Backlight module and display device

Abstract

The present application relates to a backlight module and a display device. The backlight module is arranged on the backlight side of a liquid crystal display panel. The backlight module includes a middle frame and a support portion. The support portion is arranged between the middle frame and the edge of the liquid crystal display panel, and the side of the support portion away from the middle frame is formed into an inwardly inclined inclined surface. The backlight module of the present application is provided with a support portion between the middle frame and the edge of the liquid crystal display panel, and the side of the support portion away from the middle frame is formed into an inwardly inclined inclined surface. The inclined surface can be adapted to the edge shape of the liquid crystal display panel, so that the backlight module can effectively support the edge of the liquid crystal display panel, reduce the curvature of the liquid crystal display panel, and improve or even avoid the problem of light leakage at the edge of the liquid crystal display panel.

Description

Technical Field

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

[0002] Liquid crystal display devices are one of the most widely used flat panel display devices. Existing liquid crystal display devices mainly include a backlight module, a middle frame and a liquid crystal display panel. Since there is generally a height difference between the backlight module and the middle frame, the liquid crystal display panel will bend under the action of gravity, resulting in an unsupported area between the edge of the liquid crystal display panel and the middle frame. In the assembly process, a roller is usually used to roll the edge of the liquid crystal display panel so that the liquid crystal display panel contacts and fixes the backing glue. The unsupported area will aggravate the bending of the liquid crystal display panel under the action of the adhesive force of the backing glue, resulting in light leakage at the edge, affecting the display quality of the product. Summary of the invention

[0003] The present application aims to provide a backlight module and a display device, wherein the backlight module can reduce the curvature of a liquid crystal display panel, improve or even avoid the light leakage problem at the edge of the liquid crystal display panel.

[0004] In the first aspect, an embodiment of the present application proposes a backlight module, which is arranged on the backlight side of a liquid crystal display panel. The backlight module includes a middle frame, and is characterized in that it also includes a supporting portion, which is arranged between the middle frame and an edge of the liquid crystal display panel, and a side of the supporting portion away from the middle frame is formed as an inwardly inclined inclined surface.

[0005] In a possible implementation manner, the inclination angle of the inclined plane is θ, and θ=arctan(2H / D), wherein H is the sum of the thicknesses of the middle frame and the support portion, and D is the inner cavity distance of the middle frame.

[0006] In a possible implementation manner, the middle frame is in a rectangular frame, and an inclination angle of an inclined surface on a long side of the middle frame is smaller than an inclination angle of an inclined surface on a short side of the middle frame.

[0007] In a possible implementation, the middle frame and the support portion are integrally formed.

[0008] In a possible implementation, the middle frame further includes a sealant, and the sealant is disposed on the inclined surface of the support portion.

[0009] In a possible implementation manner, the supporting portion is frame glue.

[0010] In a possible implementation, a shielding portion extending toward the liquid crystal display panel is further formed on the edge of the middle frame, and the thickness of the shielding portion is greater than the maximum thickness of the supporting portion.

[0011] In a possible implementation manner, a light shielding layer is provided on the shielding portion.

[0012] In a possible implementation, the light shielding layer is a black tape or a black adhesive strip.

[0013] In a second aspect, an embodiment of the present application further proposes a display device, comprising: a liquid crystal display panel; and a backlight module, which is arranged on the backlight side of the liquid crystal display panel.

[0014] A backlight module and a display device are provided in an embodiment of the present application. The backlight module is provided with a support portion between a middle frame and an edge of a liquid crystal display panel, and a side of the support portion away from the middle frame is formed into an inwardly inclined slope, and the slope can be adapted to the edge shape of the liquid crystal display panel, so that the backlight module can effectively support the edge of the liquid crystal display panel, reduce the bending of the liquid crystal display panel, and improve or even avoid the problem of light leakage at the edge of the liquid crystal display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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 accompanying drawings, the same reference numerals are used for the same components. The accompanying drawings are not drawn according to the actual scale, but are only used to illustrate the relative position relationship. The layer thickness of some parts is exaggerated for easy understanding, and the layer thickness in the accompanying drawings does not represent the proportional relationship of the actual layer thickness.

[0016] Figure 1 A schematic diagram showing the structure of a liquid crystal display panel of a display device in the related art during the assembly process;

[0017] Figure 2 Show Figure 1 A schematic diagram of the structure of the assembled liquid crystal display panel;

[0018] Figure 3 A schematic structural diagram of a backlight module and a display device provided in the first embodiment of the present application is shown;

[0019] Figure 4 Show Figure 3 A schematic diagram of the enlarged structure of the middle area A;

[0020] Figure 5 A schematic structural diagram of a backlight module and a display device provided in a second embodiment of the present application is shown;

[0021] Figure 6 A schematic structural diagram of a backlight module and a display device provided in a third embodiment of the present application is shown;

[0022] Figure 7 Show Figure 6 Schematic diagram of the enlarged structure of the middle area B;

[0023] Figure 8A schematic structural diagram of a backlight module and a display device provided in a fourth embodiment of the present application is shown.

[0024] Description of reference numerals:

[0025] 1. Backlight module; 11. Middle frame; 12. Support part; 121. Inclined surface; 13. Frame glue; 14. Shielding part; 2. Liquid crystal display panel. DETAILED DESCRIPTION

[0026] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least part of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of the regional structure may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0027] Figure 1 A schematic diagram showing the structure of a liquid crystal display panel of a display device in the related art during the assembly process is shown. Figure 2 Show Figure 1 Schematic diagram of the structure of the assembled liquid crystal display panel.

[0028] like Figure 1 As shown, a display device in the related art includes a liquid crystal display panel 2 and a backlight module 1 arranged on the backlight side of the liquid crystal display panel 2. Since the liquid crystal display panel 2 is a non-emissive light receiving element, it is necessary to provide a light source through the backlight module 1 arranged on its backlight side. In order to prevent the high temperature generated by the backlight module 1 from burning the liquid crystal display panel 2, or to prevent the backlight module 1 from directly contacting the liquid crystal display panel 2 and scratching the liquid crystal display panel 2, such as scratching the lower polarizer on the backlight side, a certain height difference is formed between the backlight module 1 and the liquid crystal display panel 2 by setting a middle frame 11. The liquid crystal display panel 2 will bend under the action of its own gravity, so that there is an unsupported area between the edge of the liquid crystal display panel 2 and the middle frame 11, that is, Figure 1 The edge of the liquid crystal display panel 2 is raised.

[0029] like Figure 2As shown, during the assembly process, the LCD panel 2 uses a roller to roll the raised edge portion to flatten the unsupported area, and then adheres and fixes the unsupported area to the middle frame 11 through the frame glue 13. However, the unsupported edge area will inevitably deform during the rolling process, and the adhesive force of the frame glue 13 further aggravates the bending of the LCD panel 2, resulting in light leakage at the edge.

[0030] To this end, the present invention provides a backlight module and a display device, which can reduce the curvature of the liquid crystal display panel and improve the edge light leakage problem of the liquid crystal display panel. The specific structure of the backlight module and the display device provided by the present invention is described in detail below in conjunction with the accompanying drawings.

[0031] First embodiment

[0032] Figure 3 A schematic structural diagram of a backlight module and a display device provided in the first embodiment of the present application is shown.

[0033] like Figure 3 As shown, the display device provided in the first embodiment of the present application includes a backlight module 1 and a liquid crystal display panel 2, the backlight module 1 includes a middle frame 11 and a support portion 12, the support portion 12 is arranged between the middle frame 11 and the edge of the liquid crystal display panel 2, and the side of the support portion 12 away from the middle frame 11 is formed as an inwardly inclined inclined surface 121.

[0034] When the liquid crystal display panel 2 bends under the action of its own gravity, the edge of the liquid crystal display panel 2 is formed into an inclined plane with a certain slope, and the inclined plane 121 of the support portion 12 can fit the edge shape of the liquid crystal display panel 2, and the two are in surface contact. The edge of the liquid crystal display panel 2 is fully supported and tightly fitted by the support portion 12. Since there is no need to roll the edge of the liquid crystal display panel 2, its edge can be prevented from being deformed, thereby improving or even avoiding the generation of edge light leakage. In addition, the liquid crystal display panel 2 itself does not need to change its structural design, and there is no need for a roller to roll the edge of the liquid crystal display panel 2 during the assembly process, which simplifies the process technology. Only the support portion 12 is added on the basis of the middle frame 11. The structure is simple, the production cost is low, and it is easy to mass produce.

[0035] A backlight module and a display device are provided in an embodiment of the present application. The backlight module 1 is provided with a support portion 12 between a middle frame 11 and an edge of a liquid crystal display panel 2, and a side of the support portion 12 away from the middle frame 11 is formed into a slope 121. The slope 121 can be adapted to the edge shape of the liquid crystal display panel 2, so that the backlight module 1 can effectively support the edge of the liquid crystal display panel 2, reduce the bending of the liquid crystal display panel 2, and improve or even avoid the problem of light leakage at the edge of the liquid crystal display panel 2.

[0036] Figure 4 Show Figure 3 Schematic diagram of the enlarged structure of area A in the middle.

[0037] In some embodiments, the inclination angle of the inclined surface 121 of the support portion 12 is θ, and θ=arctan(2H / D), where H is the sum of the thicknesses of the middle frame 11 and the support portion 12, and D is the inner cavity distance of the middle frame 11. Herein, the inner cavity distance refers to the size of the inner cavity of the middle frame 11 along the length direction or the width direction, which is specifically related to the structural shape of the middle frame 11 and will not be repeated.

[0038] Specifically, if Figure 4 As shown, since the inner cavity size of the middle frame 11 is much larger than the sum of the thicknesses of the middle frame 11 and the support portion 12, the inclination angle θ of the inclined surface 121 of the support portion 12 can be equivalent to Figure 4 The angle θ shown on the right side of the middle frame 11 is that half of the inner cavity distance (D / 2) of the middle frame 11 and the sum of the thickness of the middle frame 11 and the support portion 12 form a right triangle, so that the inclination angle θ of the inclined surface 121 can be calculated. In this way, the edge of the entire liquid crystal display panel 2 can be completely supported by the inclined surface 121 of the support portion 12, and the two fit tightly without deformation, thereby improving the connection stability between the liquid crystal display panel 2 and the backlight module 1.

[0039] In some embodiments, the shape of the liquid crystal display panel 2 is rectangular, the shape of the middle frame 11 is a rectangular frame, and the inclination angle of the inclined surface 121 on the long side of the middle frame 11 is smaller than the inclination angle of the inclined surface 121 on the short side of the middle frame 11.

[0040] According to the calculation formula of the inclination angle θ of the inclined surface 121, it can be known that the inclination angle θ decreases as the inner cavity distance D of the middle frame 11 increases. When the shape of the liquid crystal display panel 2 is a rectangle, under the action of its own gravity, the deformation degree of the long side edge of the liquid crystal display panel 2 is less than the deformation degree of the short side edge. Among them, the distance between the two long side edges of the liquid crystal display panel 2 is the width dimension of the middle frame 11, and the distance between the two short side edges of the liquid crystal display panel 2 is the length dimension of the middle frame 11, so the inclination angle of the inclined surface 121 on the long side of the middle frame 11 is less than the inclination angle of the inclined surface 121 on the short side of the middle frame 11.

[0041] In some embodiments, the support portion 12 is integrally formed with the middle frame 11. That is, the support portion 12 is a part of the middle frame 11, and the support portion 12 having the inclined surface 121 is added to the original body of the middle frame 11.

[0042] Optionally, the middle frame 11 is made of metal material, such as iron plate, steel plate, aluminum plate, aluminum alloy plate, galvanized steel, etc., and is mass-produced by stamping. The middle frame 11 can also be made of plastic material, such as polycarbonate (PC), and is mass-produced by injection molding, thereby reducing the difficulty and cost of making the middle frame 11.

[0043] Furthermore, the display device further includes a sealant 13, which is disposed on the inclined surface 121 of the support portion 12. The sealant 13 may be an adhesive such as epoxy resin, and is disposed on the inclined surface 121 of the support portion 12 by coating, hot pressing, or other processes, so as to fit the edge of the liquid crystal display panel 2 to the inclined surface 121 of the support portion 12, and achieve a tight connection between the two through the adhesive force of the sealant 13, thereby improving or even avoiding the generation of edge light leakage.

[0044] Further, the backlight module 1 also includes a backlight plate, a light source and an optical element. The light source includes a substrate and at least one sub-light source arranged on the substrate. The sub-light source can be a cold cathode fluorescent lamp (CCFL) or a light emitting diode (LED). CCFL is a linear light source with low power consumption and can provide bright white light. LED has good color reproducibility, long life and less power consumption. A single LED can be packaged with the substrate as a point light source, and multiple LEDs can be arranged in a straight line or multiple rows at predetermined intervals on the substrate to form a linear light source.

[0045] According to different placement positions of the light source, the backlight module 1 can be divided into an edge-type backlight module or a direct-type backlight module.

[0046] When the backlight module 1 is a side-entry backlight module, the light source is arranged on the side of the backlight plate, and the optical element is used to control the light emission direction of the light source. The optical element includes a light guide plate and an optical film arranged on the light guide plate. Taking the sub-light source of the light source as an LED as an example, the light emitting surface of the light source is arranged opposite to the light incident surface of the light guide plate, and the light emitted by the light source is converted from a line light source to a surface light source through the light guide plate to meet the requirements of brightness and uniformity. The optical film includes a lower diffusion film, a lower light enhancement film, an upper light enhancement film and an upper diffusion film stacked from bottom to top, and a prism structure is arranged on the light emitting surface of at least one of the lower light enhancement film and the upper light enhancement film, so that the emitted light produces a focusing effect, thereby improving the brightness of the backlight module 1 within a specific viewing angle range.

[0047] When the backlight module 1 is a direct-type backlight module, the light source is arranged on the light-emitting side of the backlight plate, and the optical element can be a diffusion plate. The light source directly forms a surface light source and is provided to the liquid crystal display panel 2, which is used to average the brightness of the entire backlight module 1. Taking the sub-light source of the light source as an LED as an example, multiple LEDs are arranged in rows and columns on a substrate, and the substrate is parallel to the plane where the backlight plate is located. Multiple sub-light sources are arranged toward the optical element.

[0048] In addition, the liquid crystal display panel 2 includes an array substrate, a color filter substrate and a liquid crystal layer located between the array substrate and the color filter substrate. The liquid crystal layer includes a plurality of liquid crystal molecules. The liquid crystal molecules are usually rod-shaped and can flow like liquids and have certain crystal characteristics. When the liquid crystal molecules are in an electric field, their arrangement direction will change according to the change of the electric field.

[0049] In addition, the display device provided in the first embodiment of the present application can be, for example, but not limited to, a television, a mobile phone, a tablet computer, a digital camera, a wearable device, a vehicle-mounted display device, an ATM display device, etc., which will not be repeated here.

[0050] Second embodiment

[0051] Figure 5 A schematic structural diagram of a backlight module and a display device provided in a second embodiment of the present application is shown.

[0052] like Figure 5 As shown, the second embodiment of the present application also provides a backlight module and a display device, which are similar in structure to the backlight module and the display device provided in the first embodiment, except that a shielding portion 14 extending toward the liquid crystal display panel 2 is also formed on the edge of the middle frame 11, and the thickness of the shielding portion 14 is greater than the maximum thickness of the supporting portion 12.

[0053] When the edge of the liquid crystal display panel 2 is in contact with the inclined surface 121 of the supporting portion 12, the shielding portion 14 can block the gap between the liquid crystal display panel 2 and the inclined surface 121 of the supporting portion 12. Even if the edge of the liquid crystal display panel 2 and the inclined surface 121 of the supporting portion 12 cannot be completely in contact with each other due to manufacturing errors or other reasons, the shielding portion 14 can prevent light from leaking out of the gap, thereby improving the aesthetics of the display device and the user experience.

[0054] Furthermore, a light shielding layer is coated on the shielding portion 14. Optionally, the light shielding layer is a black tape or a black adhesive strip, and the light shielding layer is arranged on the shielding portion 14 to further prevent light from leaking from the gap, thereby improving the aesthetics of the display device and the user experience.

[0055] Third embodiment

[0056] Figure 6 The structure diagram of the backlight module and the display device provided in the third embodiment of the present application is shown. Figure 7 Show Figure 6 Schematic diagram of the enlarged structure of area B in the middle.

[0057] like Figure 6 and Figure 7 As shown, the third embodiment of the present application further provides a backlight module and a display device, which are similar in structure to the backlight module and the display device provided in the first embodiment, except that the support portion 12 is a frame glue. That is, the support portion 12 and the frame glue 13 are integrally formed.

[0058] Specifically, the support portion 12 or the sealant 13 is disposed between the middle frame 11 and the edge of the liquid crystal display panel 2 , and a side of the support portion 12 or the sealant 13 away from the middle frame 11 is formed as an inwardly inclined slope 121 .

[0059] When the liquid crystal display panel 2 bends under the action of its own gravity, the edge of the liquid crystal display panel 2 is formed into an inclined plane with a certain slope, and the inclined plane 121 of the support portion 12 can fit the edge shape of the liquid crystal display panel 2, and the two are in surface contact. The edge of the liquid crystal display panel 2 is fully supported and tightly fitted by the support portion 12. Since there is no need to roll the edge of the liquid crystal display panel 2, its edge can be prevented from being deformed, thereby improving or even avoiding the generation of edge light leakage. In addition, the liquid crystal display panel 2 itself does not need to change its structural design, and there is no need for a roller to roll the edge of the liquid crystal display panel 2 during the assembly process, which simplifies the process technology. Only the support portion 12 is added on the basis of the middle frame 11. The structure is simple, the production cost is low, and it is easy to mass produce.

[0060] Optionally, the support part 12 or the frame glue 13 can be an adhesive such as epoxy resin, which is set on the inclined surface 121 of the support part 12 by coating or other process forms to fit the edge of the liquid crystal display panel 2 with the inclined surface 121 of the support part 12 to achieve a close connection between the two, thereby improving or even avoiding the occurrence of edge light leakage.

[0061] Further, the inclination angle of the inclined surface 121 of the support portion 12 or the sealant 13 is θ, and θ=arctan(2H / D), where H is the sum of the thicknesses of the middle frame 11 and the support portion 12, and D is the inner cavity distance of the middle frame 11. Herein, the inner cavity distance refers to the size of the inner cavity of the middle frame 11 along the length direction or the width direction, which is specifically related to the structural shape of the middle frame 11 and will not be repeated.

[0062] Specifically, if Figure 7 As shown, since the inner cavity size of the middle frame 11 is much larger than the sum of the thicknesses of the middle frame 11 and the support portion 12, the inclination angle θ of the inclined surface 121 of the support portion 12 can be equivalent to Figure 4The angle θ shown on the right side of the middle frame 11 is that half of the inner cavity distance (D / 2) of the middle frame 11 and the sum of the thickness of the middle frame 11 and the support portion 12 form a right triangle, so that the inclination angle θ of the inclined surface 121 can be calculated. In this way, the edge of the entire liquid crystal display panel 2 can be completely supported by the inclined surface 121 of the support portion 12, and the two fit tightly without deformation, thereby improving the connection stability between the liquid crystal display panel 2 and the backlight module 1.

[0063] In some embodiments, the shape of the liquid crystal display panel 2 is rectangular, the shape of the middle frame 11 is a rectangular frame, and the inclination angle of the inclined surface 121 on the long side of the middle frame 11 is smaller than the inclination angle of the inclined surface 121 on the short side of the middle frame 11.

[0064] According to the calculation formula of the inclination angle θ of the inclined surface 121, it can be known that the inclination angle θ decreases as the inner cavity distance D of the middle frame 11 increases. When the shape of the liquid crystal display panel 2 is a rectangle, under the action of its own gravity, the deformation degree of the long side edge of the liquid crystal display panel 2 is less than the deformation degree of the short side edge. Among them, the distance between the two long side edges of the liquid crystal display panel 2 is the width dimension of the middle frame 11, and the distance between the two short side edges of the liquid crystal display panel 2 is the length dimension of the middle frame 11, so the inclination angle of the inclined surface 121 on the long side of the middle frame 11 is less than the inclination angle of the inclined surface 121 on the short side of the middle frame 11.

[0065] In this embodiment, since the support portion 12 is a sealant, it is arranged between the middle frame 11 and the edge of the liquid crystal display panel 2. By changing the shape of the sealant, the side away from the middle frame 11 is formed into an inwardly inclined inclined surface 121, and the inclined surface 121 is directly adapted to the edge shape of the liquid crystal display panel 2, and is tightly connected through the adhesive force of the sealant 13 to prevent the edge of the liquid crystal display panel 2 from being deformed. Such a setting can, on the one hand, enable the backlight module 1 to effectively support the edge of the liquid crystal display panel 2, reduce the bending of the liquid crystal display panel 2, and improve or even avoid the problem of light leakage at the edge of the liquid crystal display panel 2; on the other hand, it also improves the connection stability between the liquid crystal display panel 2 and the backlight module 1.

[0066] Further, the backlight module 1 also includes a backlight plate, a light source and an optical element. The light source includes a substrate and at least one sub-light source arranged on the substrate. The sub-light source can be a cold cathode fluorescent lamp (CCFL) or a light emitting diode (LED). CCFL is a linear light source with low power consumption and can provide bright white light. LED has good color reproducibility, long life and less power consumption. A single LED can be packaged with the substrate as a point light source, and multiple LEDs can be arranged in a straight line or multiple rows at predetermined intervals on the substrate to form a linear light source.

[0067] According to different placement positions of the light source, the backlight module 1 can be divided into an edge-type backlight module or a direct-type backlight module.

[0068] When the backlight module 1 is a side-entry backlight module, the light source is arranged on the side of the backlight plate, and the optical element is used to control the light emission direction of the light source. The optical element includes a light guide plate and an optical film arranged on the light guide plate. Taking the sub-light source of the light source as an LED as an example, the light emitting surface of the light source is arranged opposite to the light incident surface of the light guide plate, and the light emitted by the light source is converted from a line light source to a surface light source through the light guide plate to meet the requirements of brightness and uniformity. The optical film includes a lower diffusion film, a lower light enhancement film, an upper light enhancement film and an upper diffusion film stacked from bottom to top, and a prism structure is arranged on the light emitting surface of at least one of the lower light enhancement film and the upper light enhancement film, so that the emitted light produces a focusing effect, thereby improving the brightness of the backlight module 1 within a specific viewing angle range.

[0069] When the backlight module 1 is a direct-type backlight module, the light source is arranged on the light-emitting side of the backlight plate, and the optical element can be a diffusion plate. The light source directly forms a surface light source and is provided to the liquid crystal display panel 2, which is used to average the brightness of the entire backlight module 1. Taking the sub-light source of the light source as an LED as an example, multiple LEDs are arranged in rows and columns on a substrate, and the substrate is parallel to the plane where the backlight plate is located. Multiple sub-light sources are arranged toward the optical element.

[0070] In addition, the liquid crystal display panel 2 includes an array substrate, a color filter substrate and a liquid crystal layer located between the array substrate and the color filter substrate. The liquid crystal layer includes a plurality of liquid crystal molecules. The liquid crystal molecules are usually rod-shaped and can flow like liquids and have certain crystal characteristics. When the liquid crystal molecules are in an electric field, their arrangement direction will change according to the change of the electric field.

[0071] In addition, the display device provided in the third embodiment of the present application can be, for example, but not limited to, a television, a mobile phone, a tablet computer, a digital camera, a wearable device, a vehicle-mounted display device, an ATM display device, etc., which will not be repeated here.

[0072] Fourth embodiment

[0073] Figure 8 A schematic structural diagram of a backlight module and a display device provided in a fourth embodiment of the present application is shown.

[0074] like Figure 8 As shown, the fourth embodiment of the present application also provides a backlight module and a display device, which are similar in structure to the backlight module and the display device provided in the third embodiment, except that a shielding portion 14 extending toward the liquid crystal display panel 2 is also formed on the edge of the middle frame 11, and the thickness of the shielding portion 14 is greater than the maximum thickness of the supporting portion 12.

[0075] When the edge of the liquid crystal display panel 2 is in contact with the inclined surface 121 of the supporting portion 12, the shielding portion 14 can block the gap between the liquid crystal display panel 2 and the inclined surface 121 of the supporting portion 12. Even if the edge of the liquid crystal display panel 2 and the inclined surface 121 of the supporting portion 12 cannot be completely in contact with each other due to manufacturing errors or other reasons, the shielding portion 14 can prevent light from leaking out of the gap, thereby improving the aesthetics of the display device and the user experience.

[0076] Furthermore, a light shielding layer is coated on the shielding portion 14. Optionally, the light shielding layer is a black tape or a black adhesive strip, and the light shielding layer is arranged on the shielding portion 14 to further prevent light from leaking from the gap, thereby improving the aesthetics of the display device and the user experience.

[0077] It is understandable that the technical solutions of the backlight module provided in the embodiments of the present application can be widely used to provide light sources 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.

[0078] It should be easily understood that “on,” “above,” and “over” in this 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 intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above something” or “over,” but also may include the meaning of “above something” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0079] The term "layer" used in the text may refer to a material portion including an area with a certain thickness. A layer may extend over the entire underlying structure or overlying structure, or may have a range smaller than the range of the underlying or overlying structure. In addition, a layer may be an area of ​​a homogeneous or inhomogeneous continuous structure, the thickness of which is less than the thickness of the continuous structure. For example, a layer may be located between the top surface and the bottom surface of the continuous structure or between any paired lateral planes at the top surface and the bottom surface. A layer may extend laterally, vertically and / or along a tapered surface. A substrate substrate may be a layer, may include one or more layers therein, and / or may have one or more layers located thereon, above it and / or below it. A layer may include multiple layers. For example, an interconnect layer may include one or more conductors and a contact layer (forming contacts, interconnects and / or vias therein) and one or more dielectric layers.

[0080] 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 it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, 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 display device, comprising a liquid crystal display panel and a backlight module, wherein the backlight module is arranged on the backlight side of the liquid crystal display panel, the backlight module comprises a middle frame, and a certain height difference is formed between the backlight module and the liquid crystal display panel by arranging the middle frame, characterized in that: The backlight module comprises a support portion, the support portion is arranged between the middle frame and the edge of the liquid crystal display panel, and a side of the support portion away from the middle frame is formed as an inwardly inclined slope; The inclination angle of the inclined plane is θ, and θ=arctan(2H / D), wherein H is the sum of the thickness of the middle frame and the support portion, and D is the inner cavity distance of the middle frame; The inclined surface is adapted to the edge shape of the liquid crystal display panel, so that the backlight module effectively supports the edge of the liquid crystal display panel and reduces the bending of the liquid crystal display panel under the action of its own gravity.

2. The display device according to claim 1, characterized in that The middle frame is in the shape of a rectangular frame, and the inclination angle of the inclined surface on one side of the long side of the middle frame is smaller than the inclination angle of the inclined surface on one side of the short side of the middle frame.

3. The display device according to claim 1, characterized in that The middle frame and the support portion are integrally formed.

4. The display device according to claim 3, characterized in that: It also includes a sealant, and the sealant is arranged on the inclined surface of the supporting part.

5. The display device according to claim 1, characterized in that The supporting part is frame glue.

6. The display device according to claim 1, characterized in that: A shielding portion extending toward the liquid crystal display panel is also formed at the edge of the middle frame, and the thickness of the shielding portion is greater than the maximum thickness of the supporting portion.

7. The display device according to claim 6, characterized in that: A light shielding layer is arranged on the shielding portion.

8. The display device according to claim 7, characterized in that: The light shielding layer is a black tape or a black adhesive strip.

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