Backlight module and display device

Abstract

The present application relates to a backlight module and a display device. The backlight module includes a backplane, a light bar, and a light guide plate. The light guide plate and the backplane are stacked in the height direction. The light guide plate has a light incident surface and a light exit surface on the same side, and both the light incident surface and the light exit surface are located on the side of the light guide plate away from the backplane. The light source of the light bar faces the light incident surface. The backlight module and the display device can significantly improve the light shadow phenomenon generated by the backlight source.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly to a backlight module and a display device. Background Art

[0002] Liquid crystal display devices mainly include a liquid crystal display panel (Liquid Crystal Display, abbreviated as LCD) and a backlight module. The backlight module mainly includes a back plate, a light guide plate, and an LED light bar. In the prior art, it is generally set as a side-entry backlight module, that is, the LED light bar is arranged towards the side surface of the light guide plate. Limited by space and product specification dimensions, the distance between light sources on the LED light bar is fixed, and the distance from the light source to the side surface (light incident surface) of the light guide plate is fixed. And limited by factors such as the divergence angle of the light source, it is easy to have the phenomenon of uneven brightness and darkness in some areas where light enters the light guide plate, that is, the light shadow phenomenon. Summary of the Invention

[0003] The present application aims to provide a backlight module and a display device, which can significantly improve the light shadow phenomenon generated by the backlight source.

[0004] On the one hand, an embodiment of the present application provides a backlight module, which includes a back plate, a light bar, and a light guide plate. The light guide plate and the back plate are stacked in the height direction. The light guide plate has a light incident surface and a light exit surface on the same side, and both the light incident surface and the light exit surface are located on the side of the light guide plate away from the back plate. The light source of the light bar faces the light incident surface.

[0005] In a possible implementation manner, the light guide plate includes a first sub-plate and a second sub-plate that are connected and arranged in a stepped manner. The light incident surface is located on the first sub-plate, and the light exit surface is located on the second sub-plate. Along the height direction, the light incident surface is lower than the light exit surface.

[0006] In a possible implementation manner, the first sub-plate and the second sub-plate have the same thickness, and the first sub-plate and the second sub-plate are integrally formed by thermoplastic molding.

[0007] In a possible implementation manner, it further includes a first reflector and a second reflector. The first reflector is arranged on the side of the first sub-plate away from the light incident surface, and the second reflector is arranged on the side of the second sub-plate away from the light exit surface.

[0008] The reflection intensity of the first reflector is greater than the reflection intensity of the second reflector.

[0009] In a possible implementation manner, the second reflector is arranged between the second sub-plate and the back plate, the first reflector is arranged between the first sub-plate and the back plate, or the first reflector is arranged on the side of the back plate away from the light guide plate.

[0010] In a possible implementation, the backplane includes a bottom plate and a side plate connected to each other. The bottom plate and the side plate enclose to form a receiving cavity. The light bar and the light guide plate are located in the receiving cavity, and the light guide plate is connected to the bottom plate.

[0011] The light bar includes a light board and at least one connecting portion extending therefrom. A plurality of light sources are arranged at intervals along the length direction of the light board itself. The light board is located on one side of the light incident surface, and the light sources are arranged on the side of the light board facing the light guide plate. The connecting portion is connected to the light guide plate and / or the backplane.

[0012] In a possible implementation, along the height direction, the surface of the light bar away from the side where the light sources are arranged is flush with the light exit surface.

[0013] In a possible implementation, there are a plurality of connecting portions, and the plurality of connecting portions are arranged at intervals along the length direction of the light board itself. The cross sections of the connecting portions and the light board are L-shaped, and the connecting portions are adhesively bonded to the side surface of the side plate or the light guide plate.

[0014] In a possible implementation, there are a plurality of connecting portions, and the plurality of connecting portions are arranged at intervals along the length direction of the light board itself. The cross sections of the connecting portions and the light board are L-shaped. The first sub-board is provided with a plurality of positioning grooves arranged at intervals. The arrangement direction of the positioning grooves is parallel to the length direction of the light board itself. A part of the connecting portion extends into the positioning grooves to limit the movement of the connecting portion relative to the light guide plate.

[0015] In a possible implementation, the bottom plate is provided with a recess for receiving the first sub-board, and the light bar is located in the recess.

[0016] In a second aspect, an embodiment of the present application further provides a display device, including:

[0017] A liquid crystal display panel; and the backlight module as described above, which is arranged on the backlight side of the liquid crystal display panel, and the backlight module is used to provide backlight for the liquid crystal display panel.

[0018] According to the backlight module and the display device provided by the embodiments of the present application, in the cooperation structure of the backplane, the light bar and the light guide plate, the light incident surface and the light exit surface of the light guide plate are arranged on the same side, and the position of the light bar is adjusted so that the light sources of the light bar can vertically enter the light guide plate along the large surface of the light guide plate in the height direction and exit from directly above. While ensuring sufficient overall brightness of the light exit surface, the light incident surface is not affected by factors such as the maximum diffusion angle of light source incidence, the distance, and the distance between adjacent light sources, thereby avoiding the phenomenon of uneven brightness and darkness in the area of the light guide plate close to the incident light and avoiding the appearance of light shadow phenomena. Description of the Drawings

[0019] The features, advantages, and technical effects of the exemplary embodiments of the present application will be described below with reference to the accompanying drawings. In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn to actual scale and are only used to illustrate the relative positional relationship. The layer thickness of some parts is exaggerated in the drawings for ease of understanding, and the layer thickness in the drawings does not represent the proportional relationship of the actual layer thickness.

[0020] Figure 1 Schematic structural diagram of a backlight module provided by an embodiment of the present application;

[0021] Figure 2 Show Figure 1 Enlarged view of part A in, where the direction indicated by arrow H is the height direction;

[0022] Figure 3 Schematic structural diagram of a light guide plate in a backlight module provided by an embodiment of the present application, where the direction indicated by arrow L is the first direction;

[0023] Figure 4 Schematic structural diagram of a back plate in a backlight module provided by an embodiment of the present application, where the direction indicated by arrow L is the first direction;

[0024] Figure 5 Schematic structural diagram of a lamp bar in a backlight module provided by an embodiment of the present application, where the direction indicated by arrow L is the first direction;

[0025] Figure 6 Front view of a partial cross-section of a backlight module provided by an embodiment of the present application, where the direction indicated by arrow H is the height direction;

[0026] Figure 7 Front view of a partial cross-section of a backlight module provided by another embodiment of the present application, where the direction indicated by arrow H is the height direction;

[0027] Figure 8 Front view of a partial cross-section of a backlight module provided by still another embodiment of the present application, where the direction indicated by arrow H is the height direction.

[0028] Explanation of reference numerals:

[0029] 1. Back plate; 11. Bottom plate; 111. Depression; 112. Groove; 12. Side plate; 13. Accommodation cavity; 2. Light guide plate; 21. First sub-plate; 211. Light incident surface; 211a. Positioning groove; 22. Second sub-plate; 221. Light exit surface; 3. Lamp bar; 3a. Light source; 31. Lamp board; 32. Connection part; 4. Second reflector; 5. First reflector. Detailed implementation manners

[0030] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, many specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present application by showing examples of the present application. In the drawings and the following description, at least some of the well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present application; and, for clarity, the dimensions of the regional structures may be exaggerated. In addition, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0031] The specific structures of the backlight module provided in each embodiment of the present application and the display device including the backlight module will be described below with reference to the accompanying drawings.

[0032] Figure 1 A schematic structural diagram of a backlight module provided in an embodiment of the present application is shown. Figure 2 Shown Figure 1 An enlarged view of part A therein. Figure 3 A schematic structural diagram of a light guide plate in a backlight module provided in an embodiment of the present application is shown. Figure 4 A schematic structural diagram of a backplane in a backlight module provided in an embodiment of the present application is shown. Figure 5 A schematic structural diagram of a lamp bar in a backlight module provided in an embodiment of the present application is shown. Wherein, the direction indicated by arrow H is the height direction, and the direction indicated by arrow L is the first direction, and the first direction L is parallel to the length direction of the lamp board itself.

[0033] As Figures 1 to 5 shown, the backlight module provided in the first embodiment of the present application is used to provide backlight to a liquid crystal display panel. The backlight module includes a backplane 1, a light guide plate 2, and a lamp bar 3. The light guide plate 2 and the backplane 1 are stacked and arranged in the height direction H.

[0034] Optionally, the material of the backplane 1 is a metal material, such as ferroaluminum alloy, etc., and is made by processes such as stamping to protect the backlight module from being easily broken under the impact of external forces. The material of the backplane 1 can also be a plastic material, such as polyimide, polycarbonate, polyethersulfone, polyethylene terephthalate, polyethylene, etc. In addition, the shape of the backplane 1 can be the same as the shape of the liquid crystal display panel using the backlight module. For example, when the shape of the liquid crystal display panel is rectangular, the shape of the backplane 1 of the backlight module used is also rectangular, and the shape of the light guide plate 2 can be set to a rectangle matching the backplane 1. Hereinafter, the backplane 1 and the light guide plate 2 are set to be rectangular as an example, and the backlight module of the embodiment of the present application will be described in detail, and will not be emphasized separately later.

[0035] Optionally, the light source 3a can be a Light-Emitting Diode (LED). The LED can be used as a self-luminous light source for display, and has the advantages of low power consumption, high brightness, high resolution, high color saturation, fast response speed, long service life, high efficiency, etc.

[0036] As Figure 2 and Figure 3 shown, the light guide plate 2 has a light incident surface 211 and a light exit surface 221 on the same side, and both the light incident surface 211 and the light exit surface 221 are located on the side of the light guide plate 2 away from the back plate 1. The light source 3a of the light bar 3 faces the light incident surface 211. By setting the light incident surface 211 and the light exit surface 221 of the light guide plate 2 on the same side in the cooperative structure of the back plate 1, the light bar 3 and the light guide plate 2, and adjusting the position of the light bar 3, the light source 3a of the light bar 3 can be vertically incident into the light guide plate 2 along the large surface of the light guide plate 2 in the height direction H and exit from directly above. While ensuring sufficient overall brightness of the light exit surface 221, the light incident surface 211 will not be affected by factors such as the maximum diffusion angle of the incident light from the light source 3a, the distance, and the distance between adjacent light sources 3a, thereby avoiding the phenomenon of uneven brightness in the area of the light guide plate 2 close to the incident light and avoiding the appearance of light shadow phenomenon.

[0037] Optionally, the material of the light guide plate 2 is polymethyl methacrylate (PMMA), polycarbonate (PC), polyethylene (PE), light guide artificial resin, etc. with high light transmittance. The light emitted from the light bar 3 enters the light guide plate 2 from the light incident surface 211 of the light guide plate 2, and then exits from the side of the light exit surface 221 of the light guide plate 2 and enters the liquid crystal display panel, thereby converting the point light source or line light source generated by the light bar 3 into a surface light source, so that the entire area of the liquid crystal display panel is illuminated with a basically uniform brightness.

[0038] Optionally, the light guide plate 2 includes a first sub-plate 21 and a second sub-plate 22 that are connected and arranged in a stepped manner. The light incident surface 211 is located on the first sub-plate 21, and the light exit surface 221 is located on the second sub-plate 22. The surface area of the light exit surface 221 is much larger than the surface area of the light incident surface 211 to ensure the brightness of the exit surface. However, for the light incident surface 211, its surface area is larger than the area of the side surface of the light guide plate 2, so that the incident light can enter through the light incident surface 211 with a larger surface area, thereby avoiding the problem that the position of the light guide plate 2 opposite to the gap between adjacent light sources 3a is prone to dark areas and ensuring more uniform brightness of the light incident surface 211.

[0039] Furthermore, along the height direction H, the light incident surface 211 is lower than the light exit surface 221. By connecting the first sub-plate 21 and the second sub-plate 22 to form a stepped form, the first sub-plate 21 is lower than the second sub-plate 22, providing a layout space for the light source 3a arranged above the first sub-plate 21 to achieve vertical incidence of light in a limited space.

[0040] Optionally, referring to Figure 6 , the first sub-board 21 and the second sub-board 22 are arranged left and right. In the height direction H, in the orthographic projection of the light guide plate 2 onto the back plate 1, the first sub-board 21 and the second sub-board 22 do not overlap.

[0041] It can be understood that for the stepped connection position between the first sub-board 21 and the second sub-board 22, it can be transitionally connected by an inclined sloping plate, or it can also be smoothly connected by setting rounded corners, and no specific limitation is made here.

[0042] It should be emphasized here that for the division of the surface areas of the light incident surface 211 and the light exit surface 221 of the set first sub-board 21 and second sub-board 22, it can be adaptively adjusted according to actual needs, and no specific limitation is made here.

[0043] Furthermore, the first sub-board 21 and the second sub-board 22 can be arranged left and right along the width direction of the light guide plate 2, and the length direction of the light guide plate 2 is parallel to the first direction L.

[0044] It can be understood that the first sub-board 21 and the second sub-board 22 have the same thickness, and the first sub-board 21 and the second sub-board 22 are integrally formed by thermoplastic molding. This is convenient for processing and mass production.

[0045] Referring to Figure 4 , Figure 5 and Figure 6 , the back plate 1 includes a connected bottom plate 11 and side plates 12. The bottom plate 11 and the side plates 12 enclose a receiving cavity 13. The light bar 3 and the light guide plate 2 are located in the receiving cavity 13. The light guide plate 2 is connected to the bottom plate 11. The light bar 3 includes a light board 31 and at least one protruding connecting portion 32. The light board 31 has a circuit board to connect the light source 3a. A plurality of light sources 3a are arranged at intervals along the length direction of the light board 31 itself. The light board 31 is located on one side of the light incident surface 211, and the light sources 3a are arranged on the side of the light board 31 facing the light guide plate 2. The connecting portion 32 is connected to the light guide plate 2 and / or the back plate 1. On the basis that the depth of the receiving cavity 13 formed by enclosing the bottom plate 11 and the side plates 12 is fixed, the light bar 3 is fixed in a limited space, so as to avoid relative movement between the light bar 3 and the light guide plate 2 from affecting the effect, and at the same time, the light sources 3a can be arranged above the light incident surface 211 along the height direction H without additionally increasing the thickness of the backlight module.

[0046] Furthermore, the length direction of the light board 31 itself is parallel to the first direction L and parallel to the length direction of the light guide plate 2.

[0047] Optionally, along the height direction H, the surface of the light bar 3 away from the side where the light source 3a is disposed is flush with the light-emitting surface 221. On the basis of ensuring that there is sufficient clearance between the light source 3a and the light-incident surface 211, it is avoided that the light bar 3 exceeds the backlight module in thickness, which affects the assembly of other components in the display panel.

[0048] Specifically, there are multiple connecting portions 32, and the multiple connecting portions 32 are arranged at intervals along the length direction of the light board 31 itself. The cross-section of the connecting portion 32 and the light board 31 is L-shaped, so as to fix the light bar 3 through the connecting portion 32 bent relative to the light board 31, improving the stability of the fixation.

[0049] In an alternative embodiment, referring to Figure 7 and Figure 8 , the connecting portion 32 can be bonded to the side plate 12 or the side surface of the light guide plate 2. In the form of bonding, while ensuring the stability of the fixed connection, the cost is saved and the assembly is facilitated.

[0050] In another alternative embodiment, referring to Figure 6 , the first sub-board 21 is provided with a plurality of positioning grooves 211a arranged at intervals. The arrangement direction of the positioning grooves 211a is parallel to the length direction of the light board 31 itself. A part of the connecting portion 32 extends into the positioning grooves 211a to limit the movement of the connecting portion 32 relative to the light guide plate 2.

[0051] Optionally, the connecting portion 32 can be in interference fit with the positioning groove 211a, or fixedly connected through fixing parts such as snap-fit grooves to prevent the connecting portion 32 from shaking relative to the light guide plate 2. Or, the connecting portion 32 can also be in clearance fit with the positioning groove 211a. On this basis, the position where the connecting portion 32 cooperates with the positioning groove 211a is bonded, thereby restricting the movement of the connecting portion 32 relative to the light guide plate 2, and no specific limitation is made here.

[0052] It should be emphasized here that for the set positioning grooves 211a for cooperating with the connecting portion 32, the cross-section of the shape of the cooperation between the positioning grooves 211a and the connecting portion 32 can be square, circular, etc. The size of the positioning grooves 211a can be adaptively adjusted according to the size of the first sub-board 21 and the relative position of the set light source 3a and other requirements, and no specific limitation is made here.

[0053] It can be understood that the bottom plate 11 is provided with a recess 111 for accommodating the first sub-board 21, and the light bar 3 is located in the recess 111. That is, the bottom plate 11 is arranged as a stepped plate structure matching the light guide plate 2, so that a recess 111 is formed on the side of the bottom plate 11 facing the first sub-board 21 to provide space for the cooperation of the first sub-board 21 and the light board 31 in the vertical direction. A slot 112 is formed on the side of the bottom plate 11 away from the second sub-board 22, so that the thickness of each part of the bottom plate 11 is the same, which is convenient for processing and forming.

[0054] Optionally, for the distance difference between the set light incident surface 211 and the light exit surface 221 in the height direction H, it can be adaptively adjusted according to the specific thickness of the set light board 31, the distance requirement from the light source 3a of the light board 31 to the light incident surface 211, the number of light sources 3a, and the distance limitation requirement between them, etc., and no specific limitation is made here.

[0055] In an alternative embodiment, the backlight module further includes a first reflector 5 and a second reflector 4. The first reflector 5 is disposed on the side of the first sub-board 21 away from the light incident surface 211, and the second reflector 4 is disposed on the side of the second sub-board 22 away from the light exit surface 221. The light reflection intensity of the first reflector 5 is greater than that of the second reflector 4, so as to improve the surface brightness of the light incident surface 211 and avoid the phenomenon of uneven brightness in this area.

[0056] Optionally, the second reflector 4 is disposed between the second sub-board 22 and the backplane 1, and the first reflector 5 is disposed between the first sub-board 21 and the backplane 1, or the first reflector 5 is disposed on the side of the backplane 1 away from the light guide plate 2, so as to ensure a good light reflection effect.

[0057] It can be understood that the second reflector 4 is a reflective sheet, and the first reflector 5 is a reflective powder. Optionally, the reflective sheet can be prepared from a plastic material, and the reflective powder can also be of the same material. For example, polyethylene terephthalate (PET), polycarbonate (PC), polystyrene (PS), etc. The reflective sheet can also include a high-reflection coating coated on the plastic material, such as titanium dioxide (TiO2), to increase the light reflection coefficient.

[0058] In an alternative embodiment, the backlight module may further include an optical component. The optical component may include a diffusion plate and an optical film on the side of the diffusion plate away from the backplane 1. The diffusion plate is used to diffuse the light emitted by the light source 3a to balance the brightness of the entire backlight module. The optical film may include, for example, a prism sheet, a protective sheet, etc. The prism sheet is used to control the propagation direction of the light diffused by the diffusion plate so that the propagation direction of the light is perpendicular to the liquid crystal display panel. The protective sheet is used to protect the prisms of the prism sheet from being scratched, etc. The protective sheet can also be used to widen the viewing angle that was narrowed due to the prism sheet before. The diffusion plate and the optical film are fixedly connected by a transparent optical adhesive to prevent relative displacement between the diffusion plate and the optical film from affecting the light output effect of the backlight module.

[0059] In addition, an embodiment of the present application further provides a display device, including the backlight module as described above and a liquid crystal display panel. The backlight module is disposed on the backlight side of the liquid crystal display panel and is used to provide backlight for the liquid crystal display panel.

[0060] The liquid crystal display panel can be a single display panel or a dual display panel stacked in the thickness direction. When the liquid crystal display panel is a dual display panel, the display panel located at the bottom layer is used for light control, and the display panel located at the top layer is used for display. Such a setting can improve the contrast of the display device.

[0061] The liquid crystal display panel includes an array substrate, a color filter substrate disposed opposite to the array substrate, and a liquid crystal layer disposed between the array substrate and the color filter substrate. The liquid crystal layer includes a plurality of liquid crystal molecules, which are usually rod-shaped and can flow like a liquid and have certain crystal characteristics. When the liquid crystal molecules are in an electric field, their alignment directions will change according to the change of the electric field. The liquid crystal display panel controls the rotation of the liquid crystal molecules in the liquid crystal layer by applying a driving voltage on the array substrate and the color filter substrate to refract the light provided by the backlight module to generate an image.

[0062] It can be understood that the technical solutions of the backlight module 1 provided in the embodiments of the present application can be widely used to provide backlight for various liquid crystal display panels, such as TN (Twisted Nematic) display panels, IPS (In-Plane Switching) display panels, VA (Vertical Alignment) display panels, and MVA (Multi-Domain Vertical Alignment) display panels.

[0063] It should be easily understood that the terms "on...", "above...", and "over..." in the present application should be interpreted in the broadest manner, so that "on..." not only means "directly on something", but also includes the meaning of "on something" with intermediate features or layers therebetween, and "above..." or "over..." not only includes the meaning of "above something" or "over something", but also can include the meaning of "above something" or "over something" without intermediate features or layers therebetween (i.e., directly on something).

[0064] The term "layer" used in the text can refer to a part of a material including a region having a certain thickness. The layer can extend over the entire underlying structure or overlying structure, or can have a smaller range than the underlying or overlying structure. In addition, the layer can be a region of a homogeneous or heterogeneous continuous structure, and its thickness is less than the thickness of the continuous structure. For example, the layer can be located between the top surface and the bottom surface of the continuous structure or between any pair of lateral planes at the top surface and the bottom surface. The layer can extend laterally, vertically, and / or along a conical surface.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A backlight module, comprising a back plate, a light bar and a light guide plate, wherein the light guide plate and the back plate are stacked in the height direction, and is characterized in that, The light guide plate has a light incident surface and a light exit surface on the same side, and both the light incident surface and the light exit surface are located on the side of the light guide plate away from the back plate, and the light source of the light bar faces the light incident surface; The light guide plate includes a first sub-plate and a second sub-plate that are connected and arranged in a stepped manner. The light incident surface is located on the first sub-plate, and the light exit surface is located on the second sub-plate. Along the height direction, the light incident surface is lower than the light exit surface; The light bar includes a lamp board and a protruding connecting portion. A plurality of the light sources are arranged at intervals along the length direction of the lamp board itself. The lamp board is located on one side of the light incident surface, and the light source is arranged on the side of the lamp board facing the light guide plate. The connecting portion is connected to the light guide plate, or the connecting portion is connected to the light guide plate and the back plate; There are a plurality of the connecting portions, and the plurality of connecting portions are arranged at intervals along the length direction of the lamp board itself. The cross sections of the connecting portion and the lamp board are L-shaped. The first sub-plate is provided with a plurality of positioning grooves arranged at intervals. The arrangement direction of the positioning grooves is parallel to the length direction of the lamp board itself. A part of the connecting portion extends into the positioning groove to limit the movement of the connecting portion relative to the light guide plate; wherein, the connecting portion is in interference fit or clearance fit with the positioning groove, and the position where the connecting portion is fitted with the positioning groove is bonded; The back plate includes a bottom plate and a side plate connected to each other. The bottom plate and the side plate enclose a containing cavity. The light bar and the light guide plate are located in the containing cavity, and the light guide plate is connected to the bottom plate; The bottom plate is provided with a depression for accommodating the first sub-plate, and the light bar is located in the depression; 2. The backlight module according to claim 1, wherein The first sub-plate and the second sub-plate have the same thickness, and the first sub-plate and the second sub-plate are integrally formed by thermoplastic molding; 3. The backlight module according to claim 1, wherein It further includes a first reflector and a second reflector. The first reflector is arranged on the side of the first sub-plate away from the light incident surface, and the second reflector is arranged on the side of the second sub-plate away from the light exit surface; The light reflection intensity of the first reflector is greater than that of the second reflector; 4. The backlight module according to claim 1, characterized in that, Along the height direction, the surface of the light bar away from the side where the light source is arranged is flush with the light exit surface; 5. A display device, characterized in that, Comprising: A liquid crystal display panel; And The backlight module according to any one of claims 1 to 4, which is arranged on the backlight side of the liquid crystal display panel and is used to provide backlight for the liquid crystal display panel.

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