CN111830748A

CN111830748A - Backlight module and display panel

Info

Publication number: CN111830748A
Application number: CN202010697034.6A
Authority: CN
Inventors: 李德华; 付琳琳; 张鑫
Original assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2020-10-27
Anticipated expiration: 2040-07-20
Also published as: CN111830748B

Abstract

The application discloses a backlight module and a display panel, wherein the backlight module comprises a backlight plate and an optical diaphragm which are oppositely arranged; the backlight module further comprises a magnetic assembly, the magnetic assembly comprises a first magnetic part arranged on the optical diaphragm and a second magnetic part arranged on the backlight plate, and the magnetism of one side, close to the second magnetic part, of the first magnetic part is the same as the magnetism of one side, close to the first magnetic part, of the second magnetic part. Through setting up in the first magnetism portion of optics diaphragm and set up in the second magnetism portion of board in a poor light utilizes the repulsion force between first magnetism portion and the second magnetism portion to make and keep certain clearance between board in a poor light and the optics diaphragm, for the light source provides sufficient mixed light distance, need not to set up structures such as support column simultaneously on the lamp plate, improves backlight unit's packaging efficiency.

Description

Backlight module and display panel

Technical Field

The application relates to the technical field of display, in particular to a backlight module and a display panel.

Background

With the development of communication technology, electronic devices such as smart phones are becoming more and more popular. Currently, with the development of liquid crystal display technology, users have higher and higher requirements for the image quality of display panels. The Mini LED backlight technology is a novel backlight technology, can provide local light control of more partitions for a display panel, and greatly improves the dynamic contrast of the display panel, so that the user experience is improved. In the existing Mini LED display panel, a support column is generally required to be disposed between the back plate and the optical film to provide a sufficient light mixing distance for the light source disposed on the back plate.

However, in the Mini LED display panel, the backlight source is formed by splicing a plurality of light bars, and the support posts are difficult to place.

Disclosure of Invention

The embodiment of the application provides a backlight module and a display panel to solve the technical problems that in the existing Mini LED display panel, a backlight light source is formed by splicing multiple light bars, and a supporting column is difficult to place.

In order to solve the above problems, the technical scheme provided by the invention is as follows:

in a first aspect, the present application provides a backlight module, which includes a backlight plate and an optical film, which are oppositely disposed;

the backlight module further comprises a magnetic assembly, the magnetic assembly comprises a first magnetic part arranged on the optical diaphragm and a second magnetic part arranged on the backlight plate, and the magnetism of one side, close to the second magnetic part, of the first magnetic part is the same as that of one side, close to the first magnetic part, of the second magnetic part.

In some embodiments, the first magnetic portion comprises a magnetic material distributed within the optical film.

In some embodiments, the first magnetic part comprises a first magnet disposed on a side of the optical film that is proximate to or/and distal from the backlight panel.

In some embodiments, a plurality of the first magnets are disposed at intervals.

In some embodiments, the backlight plate includes a back plate and a lamp plate disposed between the back plate and the optical diaphragm, and the second magnetic portion is disposed between the back plate and the lamp plate.

In some embodiments, the second magnetic part is disposed on a side of the backlight plate near the optical film.

In some embodiments, a plurality of spaced light sources are disposed on a side of the backlight plate close to the optical film, and the second magnetic portion is disposed at a gap between two adjacent light sources.

In some embodiments, the first magnetic part comprises a first electromagnetic coil and the second magnetic part comprises a second electromagnetic coil.

In some embodiments, the centerline of the first electromagnetic coil is collinear with the centerline of the second electromagnetic coil.

In a second aspect, the present application further provides a display panel, where the display panel includes a display screen body and a backlight module as described above, and the backlight module is disposed on a back side of the display screen body.

The beneficial effects of the invention application are as follows: through setting up in the first magnetism portion of optics diaphragm and set up in backplate or/and the second magnetism portion of lamp plate utilizes the repulsion force between first magnetism portion and the second magnetism portion to make and keeps certain clearance between board and the optics diaphragm in a poor light, for the light source provides sufficient mixed light distance, need not to set up structures such as support column simultaneously on the lamp plate, improves backlight unit's packaging efficiency.

Drawings

The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.

FIG. 1 is a schematic view of a first structure of a backlight module according to the present application;

FIG. 2 is a schematic view of a second structure of the backlight module of the present application;

FIG. 3 is a schematic view of a third structure of the backlight module of the present application;

FIG. 4 is a schematic diagram of a fourth structure of the backlight module of the present application;

FIG. 5 is a schematic diagram of a first solenoid coil according to an embodiment of the present application;

FIG. 6 is a schematic view of a fifth exemplary embodiment of a backlight module according to the present disclosure;

fig. 7 is a schematic structural diagram of a display panel according to an embodiment of the present application.

Reference numerals:

10. a backlight module; 11. a back plate; 12. a lamp panel; 13. an optical film; 14. a light source; 151. a first magnetic part; 151a, a first magnet; 151b, a first electromagnetic coil; 152. a second magnetic part; 152a, a second magnet; 152b, a second electromagnetic coil; 16. a first high voltage line; 17. a first reference voltage line; 20. and a display screen body.

Detailed Description

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. It is to be understood that the embodiments described are only a few embodiments of the present application and 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 the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

The invention aims to solve the technical problems that in the existing Mini LED display panel, a backlight light source is formed by splicing a plurality of light bars, and a support column is difficult to place.

As shown in fig. 1, the backlight module 10 includes a backlight plate and an optical diaphragm 13, which are oppositely disposed, the backlight plate includes a back plate 11 and a lamp plate 12 disposed between the back plate 11 and the optical diaphragm 13, and the lamp plate 12 may be formed by splicing a plurality of lamp strips; the lamp panel 12 is close to be provided with a plurality of light sources 14 on one side of optics diaphragm 13, a plurality of light sources 14 looks interval sets up.

The optical film 13 may include one or more films such as a diffusion plate, a light guide plate, a reflection plate, a diffusion plate, a brightness enhancement film, and a composite brightness enhancement film.

Specifically, the backlight module 10 further includes a magnetic assembly, the magnetic assembly includes a first magnetic portion 151 disposed on the optical film 13 and a second magnetic portion 152 disposed on the backlight plate, and the magnetism of one side of the first magnetic portion 151 close to the second magnetic portion 152 is the same as the magnetism of one side of the second magnetic portion 152 close to the first magnetic portion 151.

The term "the same magnetic property" means that the directions of both magnetic fields are the same. The first magnetic part 151 and the second magnetic part 152 can both generate magnetic fields, the magnetism of the two opposite surfaces of the first magnetic part 151 and the second magnetic part 152 is the same, namely, the direction of the first magnetic field generated by the first magnetic part 151 between the back plate 11 and the optical diaphragm 13 is the same as the direction of the second magnetic field generated by the second magnetic part 152 between the back plate 11 and the optical diaphragm 13, and the magnetism is the same and can generate repulsive force, so that a certain gap is kept between the backlight plate and the optical diaphragm 13, a sufficient light mixing distance is provided for the light source 14, structures such as a support column do not need to be arranged on the lamp panel 12, and the assembly efficiency of the backlight module 10 is improved.

In an embodiment, the first magnetic part 151 and the second magnetic part 152 are both made of a magnetic material, and the material for manufacturing the first magnetic part 151 and the material for manufacturing the second magnetic part 152 may be one or more of electrical steel, ferrite, nickel-based alloy, rare earth alloy, and other magnetic materials.

Wherein, first magnetism portion 151 can be including distributing in magnetic material in the optics diaphragm 13, through filling magnetic material in the optics diaphragm 13 in order to form promptly first magnetism portion 151 for when can keeping certain clearance between lamp plate 12 and the optics diaphragm 13, prevent the whole thickness increase of optics diaphragm 13.

The magnetic material filled in the optical film 13 may be a granular magnetic material or a fluid magnetic material.

As shown in fig. 2, the first magnetic part 151 may further include a first magnet 151a disposed on a side of the optical film 13 close to or/and far from the lamp panel 12.

The first magnets 151a are disposed at intervals, and a gap is disposed between two adjacent first magnets 151a, so as to provide a sufficient light-transmitting area, and prevent the first magnets 151a from adversely affecting the propagation of light emitted from the light source 14, thereby affecting the display of the display panel.

On the premise of ensuring sufficient repulsive force between the first magnetic part 151 and the second magnetic part 152, the larger the gap between two adjacent first magnetic parts 151a, the smaller the thickness of the first magnetic part 151a, the smaller the influence of the first magnetic part 151 on the light transmittance of the optical diaphragm 13, and the thickness of the first magnetic part 151a and the size of the gap between two adjacent first magnetic parts 151a may be selected according to actual conditions.

In an embodiment, the first magnet 151a may be made of a reflective material or a reflective layer is disposed on a side of the first magnet 151a close to the lamp panel 12, so that the first magnet 151a simultaneously acts as a reflector, so that the light emitted from the light source 14 is sufficiently mixed in the gap between the lamp panel 12 and the optical film 13.

In an embodiment, the second magnetic part 152 may be disposed between the back plate 11 and the lamp panel 12 to prevent the second magnetic part 152 from blocking the distribution of the light source 14.

As shown in fig. 3, the second magnetic part 152 may also be disposed on a side of the lamp panel 12 close to the optical film 13.

Further, the second magnetic portion 152 is disposed at a gap between two adjacent light sources 14, so as to prevent the second magnetic portion 152 from adversely affecting the light output of the backlight module 10.

The second magnetic part 152 may include a plurality of second magnets 152a, the plurality of second magnets 152a are distributed in a gap between two adjacent light sources 14, and the plurality of second magnets 152a may be distributed uniformly or scattered.

It should be noted that the second magnetic part 152 may further include a magnetic material distributed in the back panel 11 or/and the lamp panel 12.

In an embodiment, the first magnetic part 151 is disposed on one side of the optical diaphragm 13 close to the lamp panel 12, the second magnetic part 152 is disposed on one side of the optical diaphragm 13 close to the lamp panel 12, and the first magnetic part 151 and the second magnetic part 152 are disposed relatively, so that a repulsive force between the first magnetic part 151 and the second magnetic part 152 is more uniform, and an interval between the optical diaphragm 13 and the lamp panel 12 is more uniform.

As shown in fig. 4 and 5, in one embodiment, the first magnetic part 151 includes a first electromagnetic coil 151b, and the second magnetic part 152 includes a second electromagnetic coil 152 b.

Wherein, one end of the first electromagnetic coil 151b is electrically connected to the first high voltage line 16, the other end of the first electromagnetic coil 151b is electrically connected to the first reference voltage line 17, the first high voltage line 16 provides the first electromagnetic coil 151b with a high potential voltage, the first reference voltage line 17 is grounded or connected to a low potential voltage, and the first electromagnetic coil 151b generates a magnetic field when energized; one end of the second electromagnetic coil 152b is electrically connected to the second high voltage line, the other end of the second electromagnetic coil 152b is electrically connected to the second reference voltage line, the second high voltage line provides a high-potential voltage for the second electromagnetic coil 152b, the second reference voltage line is grounded or connected to a low-potential voltage, and the second electromagnetic coil 152b generates a magnetic field when energized.

Further, the central line of first electromagnetic coil 151b and the central line of second electromagnetic coil 152b are located the same straight line to make the repulsive force between first magnetic part 151 and second magnetic part 152 more uniform, so as to avoid the dislocation between optical diaphragm 13 and lamp panel 12.

It should be noted that only one second electromagnetic coil 152b may be provided, and at this time, the center line of the second electromagnetic coil 152b may be located on the same straight line with the center line of the lamp panel 12; the second electromagnetic coil 152b may also be provided with a plurality of second electromagnetic coils 152b, a plurality of second electromagnetic coils 152b may be provided with the lamp strips in a one-to-one correspondence, and a plurality of second electromagnetic coils 152b may be provided with a plurality of first electromagnetic coils 151b in a one-to-one correspondence, so that the repulsive force between the optical film 13 and the lamp panel 12 is more uniform.

In an embodiment, the first magnetic part 151 may be formed of a transparent magnetic material to increase the light transmittance of the first magnetic part 151, and prevent the first magnetic part 151 from adversely affecting the propagation of the light emitted from the light source 14, which may affect the normal display of the display panel.

The transparent magnetic material may be formed by silica sol and magnetic particles such as iron and boron, or may be formed by dispersing a nano-iron-cobalt alloy in an aluminum fluoride medium.

As shown in fig. 6, when the first magnetic part 151 is formed of a transparent magnetic material, the first magnetic part 151 may cover the entire surface of the optical film 13.

Based on the backlight module 10, the present application further discloses a display panel, as shown in fig. 7, the display panel includes a display panel body 20 and the backlight module 10 according to any of the above embodiments, and the backlight module 10 is disposed on the back side of the display panel body 20.

The invention has the beneficial effects that: through setting up in the first magnetism portion 151 of optical film piece 13 and set up in the second magnetism portion 152 of the board that is shaded, utilize the repulsion force between first magnetism portion 151 and the second magnetism portion 152 to make and keep certain clearance between board that is shaded and the optical film piece 13, for light source 14 provides sufficient mixed light distance, need not to set up structures such as support column on lamp plate 12 simultaneously, improve backlight unit 10's packaging efficiency.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The principle and the implementation of the present application are explained by applying specific examples, and the above description of the embodiments is only used to help understanding the technical solution and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. The backlight module is characterized by comprising a backlight plate and an optical diaphragm which are oppositely arranged;

2. The backlight module as claimed in claim 1, wherein the first magnetic part comprises a magnetic material distributed in the optical film.

3. The backlight module according to claim 1, wherein the first magnetic part comprises a first magnet disposed on a side of the optical film close to or/and far away from the backlight plate.

4. The backlight module as claimed in claim 3, wherein the first magnets are spaced apart from each other.

5. The backlight module according to claim 1, wherein the backlight plate comprises a back plate and a lamp plate disposed between the back plate and the optical film, and the second magnetic portion is disposed between the back plate and the lamp plate.

6. The backlight module as claimed in claim 1, wherein the second magnetic portion is disposed on a side of the backlight plate adjacent to the optical film.

7. The backlight module as claimed in claim 6, wherein the backlight plate is provided with a plurality of spaced light sources on a side thereof adjacent to the optical film, and the second magnetic portion is disposed at a gap between two adjacent light sources.

8. The backlight module according to claim 7, wherein the first magnetic part comprises a first electromagnetic coil, and the second magnetic part comprises a second electromagnetic coil.

9. The backlight module as claimed in claim 8, wherein the center line of the first electromagnetic coil and the center line of the second electromagnetic coil are located on the same straight line.

10. A display panel, comprising a display screen body and the backlight module according to any one of claims 1 to 9, wherein the backlight module is disposed on a back side of the display screen body.