CN114415419B

CN114415419B - Backlight module, display device and vehicle

Info

Publication number: CN114415419B
Application number: CN202210052821.4A
Authority: CN
Inventors: 赵莉; 陆平英; 魏伟; 唐惠芬
Original assignee: BOE Technology Group Co Ltd; BOE Optical Science and Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; BOE Optical Science and Technology Co Ltd
Priority date: 2022-01-18
Filing date: 2022-01-18
Publication date: 2023-06-13
Anticipated expiration: 2042-01-18
Also published as: CN114415419A

Abstract

The embodiment of the application provides a backlight module, a display device and a vehicle. The backlight module comprises a module shell, an LED module, a gasket assembly and a diffusion plate. The module shell comprises a bottom shell and side walls surrounding the periphery of the bottom shell, and the bottom shell and the side walls surround to form a containing cavity. The LED module is arranged in the accommodating cavity and is configured to emit light. The gasket assembly is arranged in the accommodating cavity and surrounds the LED module, and one side, away from the LED module, of the gasket assembly abuts against the side wall. The diffuser plate sets up at the top of LED module, and the top of gasket subassembly and diffuser plate are close to the one side edge butt of LED module. In this embodiment, the gasket assembly is disposed around the LED module, so the light emitted by the LED module does not form a shadow of projection of the gasket assembly on the diffusion plate, thereby ensuring light emission uniformity of the backlight module, so as to improve display effect of the vehicle-mounted display panel.

Description

Backlight module, display device and vehicle

Technical Field

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

Background

This section provides only background information related to the present application and is not necessarily a related art.

The vehicle usually has a liquid crystal display panel to display the running state of the vehicle and provide certain entertainment effect for passengers. In the related art, the direct type backlight module is a light source located behind the liquid crystal panel, the direct type backlight module includes an LED lamp panel and a diffusion plate, a certain light mixing distance (OD) is needed between the LED lamp panel and the diffusion plate, the greater the OD, the more sufficient the light beam of the LED lamp panel is after light mixing, the lighter the light shadow is, the better the visual effect is, so different OD has different effects on the design of the direct type module light bar, in general, in order to make the light mixing of the LED lamp panel uniform, a supporting frame is arranged between the LED lamp panel and the diffusion plate to form a support for the diffusion plate, so as to ensure a certain OD value. However, the support plate in the related art easily forms a bracket shadow on the liquid crystal panel, thereby affecting the display effect of the display panel.

Disclosure of Invention

An object of the embodiment of the application is to provide a backlight module, a display device and a vehicle, so as to improve the display effect of a vehicle-mounted display panel. The specific technical scheme is as follows:

an embodiment of a first aspect of the present application provides a backlight module. The backlight module comprises a module shell, an LED module, a gasket assembly and a diffusion plate. The module shell comprises a bottom shell and side walls surrounding the periphery of the bottom shell, and the bottom shell and the side walls surround to form a containing cavity. The LED module is arranged in the accommodating cavity and is configured to emit light. The gasket assembly is arranged in the accommodating cavity and surrounds the LED module, and one side, away from the LED module, of the gasket assembly abuts against the side wall. The diffuser plate sets up at the top of LED module, and the top of gasket subassembly and diffuser plate are close to the one side edge butt of LED module.

In some embodiments of the present application, the gasket assembly is made of rubber or silicone.

In some embodiments of the present application, the rubber or the silica gel has a hardness of 30A to 60A.

In some embodiments of the present application, the gasket assembly is white in color.

In some embodiments of the present application, the LED module is a Mini-LED light panel.

In some embodiments of the present application, the spacer assembly includes a first spacer, two second spacers and a third spacer, the first spacer and the third spacer are relatively disposed at two ends of the LED module, the two second spacers are relatively disposed at the other two ends of the LED module, and a gap is disposed between the first spacer, the two second spacers and the third spacer.

In some embodiments of the present application, the backlight module further includes a film assembly disposed on a side of the diffusion plate away from the LED module.

In some embodiments of the present application, the film assembly includes at least a light enhancement sheet.

In some embodiments of the present application, when the color of the light emitted by the LED module is white, the film assembly at least further includes a prism film.

In some embodiments of the present application, when the color of the light emitted by the LED module is blue, the film material assembly at least further includes a quantum dot film.

In some embodiments of the present application, the LED module is a direct-lit backlight.

An embodiment of a second aspect of the present application provides a display device, including a backlight module in any one of the embodiments of the first aspect.

An embodiment of a third aspect of the present application proposes a vehicle comprising the display device of the embodiment of the second aspect.

The beneficial effects of the embodiment of the application are that:

according to the backlight module in the embodiment of the application, the gasket assembly is arranged in the accommodating cavity of the module shell and surrounds the LED module, so that the LED module can be fixed in the accommodating cavity of the module shell, shaking is avoided, the diffusion plate is arranged at the top of the LED module, the top of the gasket assembly is abutted with one side edge of the diffusion plate, which is close to the LED module, so that the diffusion plate can be supported to a certain extent, the distance between the LED module and the diffusion plate can be controlled through the size of the gasket assembly, and the OD value can be controlled. In this embodiment, the gasket assembly is disposed around the LED module, so the light emitted by the LED module does not form a shadow of projection of the gasket assembly on the diffusion plate, thereby ensuring light emission uniformity of the backlight module, so as to improve display effect of the vehicle-mounted display panel.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will briefly introduce the drawings that are required to be used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other embodiments may also be obtained according to these drawings to those skilled in the art.

FIG. 1 is a schematic diagram of a direct type backlight module in the prior art;

FIG. 2 is a schematic diagram of a light emitting device of a direct type backlight module in the prior art;

fig. 3 is a schematic structural diagram of a backlight module according to an embodiment of the disclosure;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a partial enlarged view at B in FIG. 3;

FIG. 6 is a cross-sectional view (OD value is greater than 0) of a backlight module with one view angle according to an embodiment of the present application;

FIG. 7 is a cross-sectional view (OD value greater than 0) of a backlight module according to another embodiment of the present disclosure;

FIG. 8 is a cross-sectional view (OD value is equal to 0) of a backlight module according to another embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a backlight module according to an embodiment of the disclosure.

Detailed Description

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other embodiments may be obtained according to these drawings to those of ordinary skill in the art.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. Based on the embodiments herein, a person of ordinary skill in the art would be able to obtain all other embodiments based on the disclosure herein, which are within the scope of the disclosure herein.

Vehicles often have liquid crystal display panels to display the driving conditions of the vehicle and also provide certain entertainment effects to passengers. As shown in fig. 1 and fig. 2, in the related art, the direct type backlight module is a light source located at the back of the liquid crystal panel, fig. 1 is a schematic diagram of the arrangement of the light beads of the direct type backlight module according to an array, where the direct type backlight module includes a housing 910 and an LED lamp plate 920, a plurality of LED lamp beads 930 are arranged on the LED lamp plate 920 in an array, the light of the plurality of LED lamp beads 930 is irradiated onto a diffusion plate, and the light of different LED lamp beads 930 is mixed by the diffusion plate and then emitted to the outside to form a display area, please refer to fig. 2, which is a light emitting schematic diagram of the LED lamp beads 930, in this drawing, the light emitting area S refers to an area formed by the light emitted by a single LED lamp bead 930 on the reference surface 940, and it can be understood that when the light emitted by the plurality of LED lamp beads 930 is irradiated onto the reference surface, an overlapping area is formed on the reference surface (not shown in the drawing), or a shadow is formed on the reference surface, assuming that the reference surface is a position, a light mixing distance OD (OD, an optical distance is a light mixing distance OD is a distance between the LED lamp 920 and the diffusion plate is a light mixing distance is a light source is also provided between the LED lamp 920 and the diffusion plate and the LED lamp plate, and the light is a light mixing distance is a light source, and a light source is more than a light source, and a light source is a light source and a light source is better when the light source is mixed by the light source and the light source. However, the support plate in the related art easily forms a bracket shadow on the liquid crystal panel, thereby affecting the display effect of the display panel.

In order to solve the technical problem, the embodiment of the application provides a backlight module, a display device and a vehicle, and aims to improve the display effect of a vehicle-mounted display panel.

As shown in fig. 3 to 5, an embodiment of a first aspect of the present application provides a backlight module. The backlight module includes a module housing 100, an LED module 200, a gasket assembly 300, and a diffusion plate 400. The module housing 100 includes a bottom case and a sidewall surrounding the periphery of the bottom case, and the bottom case and the sidewall surround to form a receiving cavity. The LED module 200 is disposed in the receiving cavity, and the LED module 200 is configured to emit light. The gasket assembly 300 is disposed in the accommodating cavity and surrounds the LED module 200, and one side of the gasket assembly 300 away from the LED module 200 abuts against the sidewall. The diffusion plate 400 is disposed on top of the LED module 200, and the top of the pad assembly 300 abuts against an edge of the diffusion plate 400 near the LED module 200.

According to the backlight module in the embodiment of the application, the gasket assembly 300 is arranged in the accommodating cavity of the module housing 100 and surrounds the LED module 200, so that the LED module 200 can be fixed in the accommodating cavity of the module housing 100, shaking is avoided, the diffusion plate 400 is arranged at the top of the LED module 200, the top of the gasket assembly 300 is abutted with the diffusion plate 400 near one side edge of the LED module 200, a certain support can be formed on the diffusion plate 400, the distance between the LED module 200 and the diffusion plate 400 can be controlled by designing the size of the gasket assembly 300, and the OD value can be controlled. In this embodiment, the gasket assembly 300 is disposed around the LED module 200, so that the light emitted by the LED module 200 does not form a shadow of the gasket assembly 300 on the diffusion plate 400, thereby ensuring the uniformity of the backlight module to improve the display effect of the vehicle-mounted display panel.

In the present embodiment, the spacer assembly 300 may be flexibly sized to meet the design requirement of the light mixing distance, and exemplary, fig. 6 and 7 illustrate schematic structures when the light mixing distance between the LED module 200 and the diffusion plate 400 is greater than 0, and fig. 8 illustrates schematic structures when the light mixing distance between the LED module 200 and the diffusion plate 400 is equal to 0.

In some embodiments of the present application, the gasket assembly 300 is made of rubber or silicone. In the related art, the vehicle-mounted product needs to pass a high temperature test at 95 ℃ for 1000hrs, and the LED has high power, so that the LED can emit heat during operation, and the rubber or silica gel has excellent heat resistance, cold resistance, dielectric property, ozone resistance, and atmospheric aging resistance, so that when the gasket assembly 300 is made of rubber or silica gel, the gasket assembly can be used for a long time from-60 ℃ (or lower) to +250 ℃ (or higher), and thus the service life of the backlight module can be prolonged.

Furthermore, in the related art, the LED module 200 is formed by splicing a plurality of lamp panels (PCB boards with LED lamps) in order to meet the assembly requirement, a certain gap is designed between each lamp panel, which easily causes a part of light energy to be lost, so as to affect the uniformity of the picture, referring to fig. 4, the LED module 200 includes a plurality of lamp beads 210 arranged in an array, a certain distance exists between the lamp beads 210 at the edge and the module housing 100, so that the display panel at the edge is easily caused to have a picture shadow caused by light energy loss, in this embodiment, when the gasket assembly 300 is respectively abutted against the module housing 100 and the LED module 200, due to the rubber and the silica gel having a certain elasticity and flexibility, not only the LED module 200 is tightly attached to the gasket assembly 300, but also the light energy of each lamp panel in the LED module 200 is tightly attached to each other, so that the problem that the light energy lost due to the peripheral side light leakage caused by the existence of the gap 340 and the existence of the gaps 340 can be reduced, and the damage to the LED module 200 caused by the light energy loss can also be avoided.

In addition, in the related art, some supporting plates are designed to have a top of the supporting frame with a sharp structure for reducing shadows, and such structures can reduce some shadows, but in the use process, the sharp structure is easy to damage the diffusion plate, so as to affect the display effect of the area. The gasket assembly in this embodiment is made of rubber or silica gel, so that the diffusion plate is not damaged, and compared with the supporting frame with a metal structure in the related art, the gasket assembly made of silica gel or rubber in this embodiment does not need to manufacture the metal plate of the supporting frame with a metal structure, so that the manufacturing cost is low, and the production cost of the backlight module can be further reduced.

In some specific embodiments, the gasket assembly 300 is adhered to the accommodating cavity of the module housing 100 by means of adhesive bonding, and the gasket assembly 300 can be stably fixed in the accommodating cavity by means of adhesive bonding, so as to avoid the position deviation of the gasket assembly 300 when the backlight module vibrates.

In some embodiments of the present application, the rubber or silicone has a hardness of 30A to 60A. In this embodiment, the rubber or the silica gel needs to have flexibility and rigidity to support the diffusion plate 400 and form a good buffer when the LED module 200 shakes, and in a specific embodiment, the hardness of the rubber or the silica gel may be 30A to 60A according to the shore hardness calculation standard, for example: 30A, 50A or 60A. Preferably, the hardness of the rubber or silica gel is 50A, which not only can well support the diffusion plate 400, but also can form a buffer area between the module housing 100 and the LED module 200, so as to prevent the LED module 200 from being damaged when the backlight module shakes.

As shown in fig. 3, 4, and 9, in some embodiments of the present application, shim assembly 300 is white in color. In the related art, in order to cover a wider area with the light emitted by the lamp beads 210 at the edge of the LED module 200, a side reflection mechanism is usually disposed at the edge of the module housing 100, which is similar to a reflection mirror, and can reflect the light emitted by the lamp beads 210, so as to avoid a dark shadow formed by the edge of the backlight module due to the light being unable to cover. In this embodiment, the gasket assembly 300 is disposed around the LED module 200, and the color of the gasket assembly 300 is designed to be white, so that the white gasket assembly 300 can reflect the light emitted by the lamp beads 210 at the edge of the LED module 200, so as to avoid the shadow formed by the edge of the backlight module due to the fact that the light cannot cover the edge.

In some embodiments of the present application, the LED module 200 is a Mini-LED light panel. In the related art, the Mini-LED lamp panel can be used for carrying out partition control, and the display panel comprising the Mini-LED lamp panel can realize high-contrast display, so that the Mini-LED lamp panel is widely applied to the market. Specifically, the Mini-LED lamp panel may include a plurality of lamp beads 210 arranged in an array, which can supply power independently in circuit design, when a display screen has a bright and dark area, the lamp beads 210 in the dark area can be turned off, and the lamp beads 210 in the light-emitting area are turned on, so that the dynamic contrast of the display panel can be improved, the purpose of saving power can also be achieved, and the gasket assembly 300 in the embodiment is arranged around the Mini-LED lamp panel, so that the light emitted by the Mini-LED lamp panel does not form a projection shadow of the gasket assembly 300 on the diffusion plate 400, and the light-emitting consistency of the backlight module can be ensured, so that the display effect of the vehicle-mounted display panel is improved.

In some embodiments of the present application, the spacer assembly 300 includes a first spacer 310, two second spacers 320 and a third spacer 330, the first spacer 310 and the third spacer 330 are disposed at two ends of the LED module 200, the two second spacers 320 are disposed at the other two ends of the LED module 200, and a gap 340 is disposed between the first spacer 310, the two second spacers 320 and the third spacer 330. For example, referring to fig. 3, the gasket assembly 300 of the present embodiment may be composed of a plurality of sub-gaskets, and gaps 340 may be formed between the sub-gaskets, and it will be appreciated that the rubber and silicone products may slightly expand in use, which may result in extrusion between the sub-gaskets, and the gaps 340 may avoid extrusion between the sub-gaskets when expanding.

In some embodiments of the present application, the backlight module further includes a film assembly 500, and the film assembly 500 is disposed on a side of the diffusion plate 400 away from the LED module 200. In the related art, the liquid crystal panel of the liquid crystal display does not emit light, but the backlight module emits light into the liquid crystal panel to display images. In order to better utilize the light emitted by the LED module 200, a plurality of film assemblies 500 are generally disposed on one side of the diffusion plate 400, wherein a portion of the film assemblies 500 are used for increasing brightness, and a portion of the film assemblies 500 are used for changing the light emitting direction, and the specific type of the film assemblies 500 is not particularly limited in this embodiment.

In some embodiments of the present application, the film assembly 500 includes at least a brightness enhancing sheet. In this embodiment, the prism sheet may be a refractive prism sheet or a total reflection prism sheet. The brightness of the light source can be improved, and the color degree of the picture is improved to a certain extent. In some embodiments, the brightness enhancement film may be DBEF (dual brightness enhancement film), which is a reflective polarizer that selectively reflects light from the backlight system so that it is not absorbed by the lower polarizer of the liquid crystal panel, thereby reusing part of the light from the full viewing angle of the liquid crystal panel and increasing the brightness of the picture.

In some embodiments of the present application, when the color of the light emitted by the LED module 200 is white, the film assembly 500 further includes at least a prism film. In this embodiment, the diffusion structure of the prism film may be a polyhedral structure such as tetrahedron, pentahedron, hexahedron, heptahedron, octahedron, or the like, which is specifically defined herein. In this embodiment, the light emitted by the LED module 200 enters the prism film through the diffusion plate 400, and the prism film uses the refraction principle of the light, so that the light emitted by the prism film is concentrated in a smaller angle, which increases the directivity of the emitted light and improves the brightness of the emitted light.

In some embodiments of the present application, when the color of the light emitted by the LED module 200 is blue, the film material assembly 500 further includes at least a quantum dot film. In this embodiment, the quantum dot film is also called QD (quantum dot) film, which is a nanomaterial with unique light characteristics, and can accurately and efficiently convert blue light emitted by the LED module 200 into red and green light, thereby forming three primary colors of RGB. The quantum dot film can be disposed on one side of the diffusion plate 400 far away from the LED module 200, and can be a thin film, and by fine adjustment of the backlight of the LED module 200, the color gamut performance can be greatly improved, so that the color is more vivid.

In some embodiments of the present application, the LED module 200 is a direct-lit backlight. In this embodiment, the light source of the direct-type backlight source is disposed in the accommodating cavity of the module housing 100, and is composed of a plurality of lamp beads 210, so that independent power supply can be realized in circuit design, when the display screen has a bright-dark area, the LEDs in the dark area can be turned off, and the LEDs in the obvious area are turned on, so that the dynamic contrast ratio of the display panel can be improved, and the purpose of power saving can also be realized.

According to the display device of the embodiment of the application, since the display device comprises the backlight module of any embodiment of the first aspect, the display device also has the beneficial effects of any embodiment of the first aspect, in particular, the display device of the embodiment comprises the backlight module, the gasket assembly 300 is arranged in the accommodating cavity of the module housing 100 and surrounds the LED module 200, the LED module 200 can be fixed in the accommodating cavity of the module housing 100 to avoid shaking, the diffusion plate 400 is arranged at the top of the LED module 200, the top of the gasket assembly 300 is abutted against one side edge of the diffusion plate 400 close to the LED module 200, thereby a certain support can be formed for the diffusion plate 400, and the distance between the LED module 200 and the diffusion plate 400 can be controlled by designing the size of the gasket assembly 300, so that the OD value can be controlled. In this embodiment, the gasket assembly 300 is disposed around the LED module 200, so that the light emitted by the LED module 200 does not form a shadow of the gasket assembly 300 on the diffusion plate 400, thereby ensuring the uniformity of the light emitted from the backlight module and improving the display effect of the display device.

Specifically, the display device may be any product or component having a display function, such as a liquid crystal display panel, electronic paper, a display, and a navigator.

According to the vehicle in the embodiment of the application, since the vehicle includes the display device in the second aspect embodiment, the display device also has the beneficial effects of the second aspect embodiment, specifically, the display device of the vehicle in the embodiment includes a backlight module, a spacer assembly 300 is disposed in the accommodation cavity of the module housing 100 and surrounds the LED module 200, so that the LED module 200 can be fixed in the accommodation cavity of the module housing 100 to avoid shaking, the diffusion plate 400 is disposed at the top of the LED module 200, and the top of the spacer assembly 300 abuts against one side edge of the diffusion plate 400 close to the LED module 200, thereby forming a certain support for the diffusion plate 400, and the distance between the LED module 200 and the diffusion plate 400 can be controlled by designing the size of the spacer assembly 300, that is, the OD value can be controlled. In this embodiment, the gasket assembly 300 is disposed around the LED module 200, so the light emitted by the LED module 200 does not form a shadow of projection of the gasket assembly 300 on the diffusion plate 400, so that the uniformity of the light emitted by the backlight module can be ensured, the display effect of the display device can be improved, and the use experience of drivers and passengers of the vehicle can be further increased.

It is noted that in the drawings, the size of layers and regions may be exaggerated for clarity of illustration. Moreover, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or intervening layers may be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may be present. In addition, it will be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or more than one intervening layer or element may also be present. Like reference numerals refer to like elements throughout.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The various embodiments of the present application are described in a related manner, and identical and similar parts of the various embodiments are all mutually referred to, and each embodiment is mainly described in the differences from the other embodiments.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the present application. Any modifications, equivalent substitutions, improvements, etc. that are within the spirit and principles of the present application are intended to be included within the scope of the present application.

Claims

1. A backlight module, comprising:

the module comprises a module shell, a first module and a second module, wherein the module shell comprises a bottom shell and a side wall surrounding the periphery of the bottom shell, and the bottom shell and the side wall are surrounded to form a containing cavity;

the LED module is arranged in the accommodating cavity and is configured to emit light;

the gasket assembly is arranged in the accommodating cavity and surrounds the LED module, one side, away from the LED module, of the gasket assembly abuts against the side wall, the gasket assembly is made of rubber or silica gel, and the gasket assembly abuts against the module shell and the LED module respectively;

the diffusion plate is arranged at the top of the LED module, and the top of the gasket assembly is abutted with the edge of one side of the diffusion plate, which is close to the LED module.

2. A backlight module according to claim 1, wherein the rubber or the silicone has a hardness of 30A to 60A.

3. A backlight module according to claim 1, wherein the gasket assembly is white in color.

4. The backlight module according to claim 1, wherein the LED module is a Mini-LED panel.

5. The backlight module according to claim 1, wherein the gasket assembly comprises a first gasket, two second gaskets and a third gasket, the first gasket and the third gasket are oppositely arranged at two ends of the LED module, the two second gaskets are oppositely arranged at the other two ends of the LED module, and a gap is arranged among the first gasket, the two second gaskets and the third gasket.

6. A backlight module according to claim 1, further comprising a film assembly disposed on a side of the diffuser plate remote from the LED module.

7. A backlight module according to claim 6, wherein the film assembly comprises at least a brightness enhancing sheet.

8. A backlight module according to claim 6, wherein the film assembly further comprises at least a prismatic film when the color of the light emitted from the LED module is white.

9. A backlight module according to claim 6, wherein the film assembly further comprises a quantum dot film when the color of the light emitted from the LED module is blue.

10. The backlight module according to claim 1, wherein the LED module is a direct type backlight.

11. A display device comprising a backlight module according to any one of claims 1 to 10.

12. A vehicle comprising the display device according to claim 11.