Backlight module and display device

Abstract

The embodiment of the utility model provides a backlight module and a display device, the backlight module comprises a back plate, an optical film and a support column, the support column is located between the optical film and the back plate, the support column comprises an elastic part, a support part and a rolling part, the elastic part is connected with the back plate, the support part is located between the elastic part and the optical film, and the rolling part is located between the elastic part and the optical film. The end, away from the optical film, of the supporting part is connected with the elastic part, the rolling part is located between the supporting part and the optical film, and the rolling part is slidably connected with the optical film, so that when the optical film is subjected to external force, the optical film is prevented from being broken or scratched by the supporting column, and the reliability and the optical picture taste of the backlight module are improved.

Description

Technical Field

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

[0002] The backlight module is a structure that provides backlight for display devices such as liquid crystal displays that cannot emit light on their own. These displays can only display colorful images through the white light provided by the backlight module. Backlight modules include direct-type backlight modules and edge-type backlight modules. Direct-type backlight modules are widely used in display components such as car displays, TV and computer monitors due to their stable structure and low cost.

[0003] The direct-type backlight module includes a back panel, a light source and a diffusion plate located above the point light source. Since the diffusion plate has a certain weight, it needs to be supported above the light source, otherwise the diffusion plate will sag onto the light source and affect the uniformity of the light emission of the backlight module. In related technologies, a supporting structure is added between the diffusion plate and the back panel of the backlight module to support the diffusion plate. In the face of strong vibration, the diffusion plate is easily broken or scratched by the supporting column, which reduces the reliability and optical picture quality of the backlight module and causes a decline in the display effect of the monitor. Utility Model Content

[0004] The embodiments of the utility model provide a backlight module and a display device to alleviate the deficiencies in the related art.

[0005] To achieve the above functions, the technical solutions provided by the embodiments of the present invention are as follows:

[0006] The utility model provides a backlight module, comprising a back plate, an optical film arranged opposite to the back plate, and a support column located between the optical film and the back plate, wherein the support column comprises:

[0007] an elastic portion, the elastic portion being connected to the back plate;

[0008] A supporting portion, located between the elastic portion and the optical film, wherein one end of the supporting portion away from the optical film is connected to the elastic portion;

[0009] The rolling part is located between the supporting part and the optical film, and the rolling part is slidably connected to the optical film.

[0010] Optionally, in some embodiments, the elastic portion includes a plurality of elastic members, one end of the elastic member close to the support portion is connected to the support portion, and one end of the elastic member close to the back plate is connected to the back plate;

[0011] Wherein, when the optical film moves toward the direction approaching the supporting column, the elastic member is compressed toward the direction approaching the back plate.

[0012] Optionally, in some embodiments, the elastic member includes a first connecting segment and a second connecting segment connected to each other, and an extending direction of the first connecting segment and an extending direction of the second connecting segment form a preset angle.

[0013] Optionally, in some embodiments, one end of the first connecting section close to the supporting portion is connected to the supporting portion, and one end of the first connecting section away from the supporting portion extends from the supporting portion toward a direction close to the back plate;

[0014] One end of the second connecting section close to the first connecting section is connected to the first connecting section, and one end of the second connecting section away from the first connecting section extends from the first connecting section in a direction away from the central axis of the support portion.

[0015] Optionally, in some embodiments, a side of the second connecting section close to the back plate is flush with a side of the back plate close to the second connecting section.

[0016] Optionally, in some embodiments, the elastic portion further comprises a base, the base is located between the elastic member and the support portion, and a plurality of the elastic members are arranged at intervals along the circumferential direction of the base;

[0017] Wherein, one end of the base close to the support portion is connected to the support portion, and one end of the base away from the support portion is connected to the elastic member.

[0018] Optionally, in some embodiments, the base includes a plurality of protrusions extending in a direction away from the central axis of the support portion, one protrusion is provided corresponding to one elastic member, and the protrusion is connected to an end of the elastic member away from the back plate.

[0019] Optionally, in some embodiments, a receiving cavity is provided on a side of the support portion close to the optical film, the rolling portion is provided in the receiving cavity, and the rolling portion is rollingly connected to the support portion;

[0020] Wherein, the diameter of the rolling portion is greater than the depth of the accommodating cavity.

[0021] Optionally, in some embodiments, the rolling portion is a sphere, and an opening is formed on a side of the accommodating cavity close to the rolling portion, and a diameter of the opening is smaller than a diameter of the rolling portion.

[0022] An embodiment of the utility model further provides a display device, comprising a display panel and any one of the above-mentioned backlight modules, wherein the backlight module is arranged on the backlight side of the display panel.

[0023] The utility model provides a backlight module and a display device, wherein the backlight module comprises a back plate, an optical film and a support column, wherein the support column is located between the optical film and the back plate, and the support column comprises an elastic portion, a support portion and a rolling portion, wherein the elastic portion is connected to the back plate, the support portion is located between the elastic portion and the optical film, an end of the support portion away from the optical film is connected to the elastic portion, the rolling portion is located between the support portion and the optical film, and the rolling portion is slidably connected to the optical film, so that when the optical film is subjected to external force, the optical film is prevented from being broken or scratched by the support column, thereby improving the reliability of the backlight module and the optical picture quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 An exploded schematic diagram of a backlight module provided by an embodiment of the utility model;

[0026] Figure 2 A partial cross-sectional schematic diagram of a backlight module provided by an embodiment of the utility model;

[0027] Figure 3 It is an exploded schematic diagram of a backlight module in the related art;

[0028] Figure 4 It is a partial cross-sectional schematic diagram of a backlight module in the related art;

[0029] Figure 5 A schematic diagram of the structure of the support portion provided by an embodiment of the utility model;

[0030] Figure 6 An exploded schematic diagram of a support portion provided by an embodiment of the utility model;

[0031] Figure 7 The present invention is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the actual use or working mode of the device, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only, and the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be connected or detachably connected; it can be mechanically connected, electrically connected, or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] The disclosure below provides many different embodiments for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention provides various specific examples of processes and materials, but those skilled in the art can recognize the application of other processes and / or the use of other materials.

[0036] The embodiments of the present utility model provide a backlight module and a display device. The following are detailed descriptions of each embodiment. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.

[0037] Please combine Figure 1 and Figure 2 ;in, Figure 1 An exploded schematic diagram of a backlight module provided by an embodiment of the utility model; Figure 2A partial cross-sectional schematic diagram of a backlight module provided by an embodiment of the utility model;

[0038] The present embodiment provides a backlight module 1, which includes a back plate 11, an optical film 12 arranged opposite to the back plate 11, and a support column 13 located between the optical film 12 and the back plate 11, the support column 13 includes an elastic portion 133, a supporting portion 132 and a rolling portion 131, the elastic portion 133 is connected to the back plate 11, the supporting portion 132 is located between the elastic portion 133 and the optical film 12, the end of the supporting portion 132 away from the optical film 12 is connected to the elastic portion 133, the rolling portion 131 is located between the supporting portion 132 and the optical film 12, and the rolling portion 131 is slidably connected to the optical film 12.

[0039] It should be noted that please combine Figure 3 and Figure 4 ;in, Figure 3 It is an exploded schematic diagram of a backlight module in the related art; Figure 4 It is a partial cross-sectional schematic diagram of a backlight module in the related art.

[0040] In the backlight module 2 of the related art, the back plate 21 and the optical film 22 are spaced apart so that the light emitting body arranged on the back plate 21 can evenly shine light onto the optical film 22. In order to prevent the optical film 22 from collapsing and bending, a plurality of support columns 23 are usually arranged on the back plate 21 for supporting the optical film 22. During the transportation of the backlight module 2, the optical film 22 is easily vibrated due to external force. The two ends of the support column 23 are in direct contact with the back plate 21 and the optical film 22 respectively, so it is easy to cause friction and collision between the support column 23 and the optical film 22, thereby reducing the reliability and optical picture quality of the backlight module 2 and causing the display effect of the display to decline.

[0041] It can be understood that in this embodiment, the support column 13 includes an elastic portion 133, a support portion 132 and a rolling portion 131. The elastic portion 133 is connected to the back plate 11, the support portion 132 is located between the elastic portion 133 and the optical film 12, the support portion 132 is connected to the elastic portion 133 at one end away from the optical film 12, the rolling portion 131 is located between the support portion 132 and the optical film 12, and the rolling portion 131 is slidably connected to the optical film 12, so that when the optical film 12 is subjected to external force, the optical film 12 is prevented from being broken or scratched by the support column 13, thereby improving the reliability and optical picture quality of the backlight module 1.

[0042] Specifically, please continue to combine Figure 1 and Figure 2In some embodiments, the backlight module 1 can be a direct-type backlight module 1, which can provide a backlight source for a display device such as a liquid crystal display that cannot emit light independently. The backlight module 1 includes a back panel 11, an optical film 12, a light-emitting component 14 and a support column 13.

[0043] The back panel 11 includes a bottom frame 111 and a frame 112, one end of the frame 112 is connected to the bottom frame 111, the optical film 12 is arranged opposite to the bottom frame 111, and the optical film 12 is connected to the other end of the frame 112, the optical film 12 is arranged opposite to the bottom frame 111, the support column 13 is located between the bottom frame 111 and the optical film 12, one end of the support column 13 is slidably connected to the optical film 12, and the other end of the support column 13 abuts against the bottom frame 111; wherein the optical film 12 includes but is not limited to one of a diffuser, a prism and a brightness enhancement sheet.

[0044] It is understandable that, in the prior art, as consumers pursue larger-sized display devices, the size of the optical film 12 will also increase and will have a heavier weight. If the optical film 12 is supported only by the frame 112, the middle part of the optical film 12 is at risk of collapsing downward, thereby seriously affecting the optical taste. Therefore, in this embodiment, the support column 13 is arranged between the bottom frame 111 and the optical film 12, one end of the support column 13 is slidably connected to the optical film 12, and the other end of the support column 13 is abutted against the bottom frame 111, thereby supporting the optical film 12.

[0045] The support column 13 includes an elastic portion 133, a supporting portion 132 and a rolling portion 131. The elastic portion 133 is arranged on a side of the bottom frame 111 close to the optical film 12, the supporting portion 132 is arranged on a side of the elastic portion 133 away from the bottom frame 111, and the rolling portion 131 is arranged on a side of the supporting portion 132 away from the elastic portion 133.

[0046] Please combine Figure 1 , Figure 2 , Figure 5 and Figure 6 ;in, Figure 5 A schematic diagram of the structure of a support column provided by an embodiment of the utility model; Figure 6 An exploded schematic diagram of a support column provided in an embodiment of the utility model.

[0047] In some embodiments, the elastic portion 133 includes a plurality of elastic members 1331, and one end of the elastic member 1331 close to the support portion 132 is connected to the support portion 132, and one end of the elastic member 1331 close to the bottom frame 111 is connected to the bottom frame 111; wherein, when the optical film 12 moves toward the direction close to the support column 13, the elastic member 1331 is compressed toward the direction close to the back plate 11, and the elastic member 1331 deforms to absorb the downward pressure, so that the support column 13 can be used as a buffer by the elastic force of the elastic member 1331, preventing the optical film 12 from bending downward due to its own gravity or the pressure of the film layer on it due to its large area; at the same time, it prevents the backlight module 1 from being easily broken by the support column 13 in the face of strong vibration.

[0048] It should be noted that the downward pressure refers to Figure 1 The pressure applied to the optical film 12 along the third direction Z may be due to the large area of ​​the optical film 12, the pressure in the middle part due to its own gravity or the pressure of the film layer on it, or the pressure caused by the optical film 12 vibrating due to external force during the transportation of the backlight module 1.

[0049] In some embodiments, the elastic portion 133 is elastic, and the elastic portion 133 includes a base 1332, the base 1332 is located between the elastic member 1331 and the support portion 132, and a plurality of the elastic members 1331 are arranged at intervals along the circumferential direction of the base 1332; wherein, one end of the base 1332 close to the support portion 132 is connected to the support portion 132, and the end of the base 1332 away from the support portion 132 is connected to the elastic member 1331.

[0050] Specifically, the central axis W1 of the support portion 132 coincides with the central axis W2 of the base 1332, and the base 1332 includes a plurality of protrusions 13321, and the protrusions 13321 extend in a direction away from the central axis W2 of the base 1332. One protrusion 13321 is arranged corresponding to one elastic member 1331, and the protrusion 13321 is connected to one end of the elastic member 1331 away from the bottom frame 111; wherein the angles between the two protrusions 13321 are equal, thereby enhancing the stability of the elastic portion 133.

[0051] It should be noted that the elastic portion 133 may include two, three, four or five elastic members 1331. The present embodiment does not impose any specific restriction on the number of the elastic members 1331. The technical solution of the present invention is illustrated by taking the case where the elastic portion 133 includes three elastic members 1331, the base 1332 includes three protrusions 13321, and the angles between any two of the protrusions 13321 are 120 degrees.

[0052] In some embodiments, the support column 13 contacts the optical film 12 to cause the elastic member 1331 to deform, and the elastic member 1331 includes but is not limited to a spring, and the elastic member 1331 includes a first connecting segment 13311 and a second connecting segment 13312, and the extension direction of the first connecting segment 13311 and the extension direction of the second connecting segment 13312 form a preset angle, and this embodiment does not specifically limit the size of the preset angle.

[0053] The elastic member 1331 is connected to the support portion 132 through the base 1332; specifically, the end of the first connecting segment 13311 close to the base 1332 is connected to the base 1332, and the end of the first connecting segment 13311 away from the base 1332 extends from the base 1332 toward the direction close to the bottom frame 111, and the end of the second connecting segment 13312 close to the first connecting segment 13311 is connected to the first connecting segment 13311, and the end of the second connecting segment 13312 away from the first connecting segment 13311 extends from the first connecting segment 13311 toward the direction away from the central axis W1 of the support portion 132.

[0054] Understandably, see Figure 3 and Figure 4 It can be known that in the related art, in order to ensure the good optical quality of the backlight module 2, the support column 23 is generally made into a truncated cone structure, which will make the end of the support column 23 close to the optical film 22 relatively fragile. Under the impact of external force, the support column 23 is easy to bend or break, and the optical film 22 is easy to be broken by the support column 23, thereby reducing the mixed light distance, causing the backlight module 2 to have a lamp shadow, thereby reducing the reliability of the backlight module 2.

[0055] In this embodiment, the elastic member 1331 includes a first connecting section 13311 and a second connecting section 13312. The extension direction of the first connecting section 13311 and the extension direction of the second connecting section 13312 form a preset angle, so that the deformation of the elastic member 1331 can buffer the pressure on the support column 13, which is beneficial to prevent the support column 13 from bending or breaking, and at the same time avoid the optical module from being broken by the support column 13, thereby improving the reliability and optical picture quality of the backlight module 1.

[0056] In some embodiments, a side of the second connecting section 13312 close to the back plate 11 is flush with a side of the back plate 11 close to the second connecting section 13312 , thereby further enhancing the buffering effect of the elastic portion 133 on unloading the deformation external force exerted on the supporting portion 132 , which is beneficial to improving the reliability and optical picture quality of the backlight module 1 .

[0057] Specifically, the base 1332 and the support part 132 can be connected by adhesion or embedding, and the side of the support part 132 close to the base 1332 is flush with the side of the base 1332 close to the support part 132, and the orthographic projection of the support column 13 on the back plate 11 covers the orthographic projection of the base 1332 on the back plate 11, thereby improving the bonding force between the base 1332 and the support part 132 after connection, improving the stability and reliability of the support part 132, and then reducing the number of support columns 13 used.

[0058] In some embodiments, the base 1332 and the elastic member 1331 are integrally formed; it can be understood that the integrally formed structure can not only ensure the stability of the elastic portion 133 structure, but also facilitate molding and simple manufacturing, and eliminates unnecessary assembly parts and connection procedures, thereby greatly improving the assembly efficiency of the support member.

[0059] Please continue to combine Figure 1 , Figure 2 , Figure 5 and Figure 6 In some embodiments, the rolling portion 131 is located between the supporting portion 132 and the optical film 12, and the rolling portion 131 is slidably connected to the optical film 12.

[0060] Specifically, a accommodating cavity 1321 is provided on one side of the support portion 132 close to the optical film 12, and the rolling portion 131 is disposed in the accommodating cavity 1321, and the rolling portion 131 is rollingly connected to the support portion 132; wherein, the diameter of the rolling portion 131 is greater than the depth of the accommodating cavity 1321, so that when the optical film 12 is acted upon by an external force and moves along the first direction or the second direction, the support column 13 can be slidably connected to the optical film 12 by the rolling portion 131, so as to prevent the optical film 12 from being broken by the support column 13, thereby improving the reliability and optical picture quality of the backlight module 1.

[0061] In some embodiments, the rolling portion 131 may be a sphere, and an opening 13211 is provided on a side of the accommodating cavity 1321 close to the rolling portion 131, the diameter of the opening 13211 is smaller than the diameter of the rolling portion 131, and the diameter of the rolling portion 131 is greater than or equal to 0.7 mm, so that when the optical film 12 moves along the first direction X or the second direction Y, the rolling of the rolling portion 131 can avoid friction between the optical film 12 and the support column 13, thereby preventing the optical film 12 from being scratched by the support column 13.

[0062] In some embodiments, the light-emitting component 14 includes a light board and a plurality of point light sources 141, wherein the light board is mounted on a back panel 11, and a side of the light board away from the back panel 11 includes a mounting surface, and the plurality of point light sources 141 are arranged on the mounting surface; wherein a light-emitting diode (LED) lamp can be used as the point light source 141.

[0063] The support portion 132 can be arranged between the lamp board and the optical film 12. The orthographic projection of the support portion 132 on the lamp board does not overlap with the orthographic projection of the point light source on the lamp board. The material of the support portion 132 can be white, transparent or translucent plastic material, thereby avoiding the generation of lamp shadow when the backlight module 1 emits light, ensuring the uniformity and visual effect of the light emission of the backlight module 1, and also ensuring that the light-emitting components of the backlight module 1 will not be damaged by the downward pressure of the optical film 12.

[0064] See also Figure 7 , which is a schematic diagram of the structure of the display device provided in an embodiment of the utility model.

[0065] This embodiment provides a display device, which includes the backlight module and the display panel described in any one of the above embodiments, and the backlight module is arranged on the backlight side of the display panel.

[0066] Among them, the display panel includes but is not limited to a light-emitting diode (LED) display panel, and this embodiment does not make any specific restrictions on this; it should be noted that this embodiment describes the technical solution of the utility model by taking the display panel as a light-emitting diode display panel as an example.

[0067] It can be understood that the backlight module has been described in detail in the above embodiments and will not be repeated here.

[0068] In specific applications, the display device can be a display screen of a smart phone, tablet computer, laptop computer, smart bracelet, smart watch, smart glasses, smart helmet, desktop computer, smart TV or digital camera, and can even be used on electronic devices with flexible display screens.

[0069] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0070] The above is a detailed introduction to a backlight module and a display device provided in an embodiment of the utility model. Specific examples are used in this article to illustrate the principle and implementation mode of the utility model. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the utility model. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A backlight module, characterized in that: It includes a back plate, an optical film arranged opposite to the back plate, and a support column located between the optical film and the back plate, wherein the support column includes: an elastic portion, the elastic portion being connected to the back plate; A supporting portion, located between the elastic portion and the optical film, wherein one end of the supporting portion away from the optical film is connected to the elastic portion; The rolling part is located between the supporting part and the optical film, and the rolling part is slidably connected to the optical film.

2. The backlight module according to claim 1, characterized in that: The elastic part includes a plurality of elastic members, one end of the elastic member close to the support part is connected to the support part, and one end of the elastic member close to the back plate is connected to the back plate; Wherein, when the optical film moves toward the direction approaching the supporting column, the elastic member is compressed toward the direction approaching the back plate.

3. The backlight module according to claim 2, characterized in that: The elastic member includes a first connecting section and a second connecting section connected to each other, and an extending direction of the first connecting section and an extending direction of the second connecting section form a preset angle.

4. The backlight module according to claim 3, characterized in that: One end of the first connecting section close to the supporting portion is connected to the supporting portion, and one end of the first connecting section away from the supporting portion extends from the supporting portion toward a direction close to the back plate; One end of the second connecting section close to the first connecting section is connected to the first connecting section, and one end of the second connecting section away from the first connecting section extends from the first connecting section in a direction away from the central axis of the support portion.

5. The backlight module according to claim 4, characterized in that: A side of the second connecting section close to the back plate is flush with a side of the back plate close to the second connecting section.

6. The backlight module according to claim 2, characterized in that: The elastic part further comprises a base, the base is located between the elastic member and the support part, and a plurality of the elastic members are arranged at intervals along the circumferential direction of the base; Wherein, one end of the base close to the support portion is connected to the support portion, and one end of the base away from the support portion is connected to the elastic member.

7. The backlight module according to claim 6, characterized in that: The base includes a plurality of protrusions, which extend in a direction away from the central axis of the support portion. One protrusion is arranged corresponding to one elastic member, and the protrusion is connected to an end of the elastic member away from the back plate.

8. The backlight module according to claim 1, characterized in that: A receiving cavity is provided on one side of the support portion close to the optical film, the rolling portion is arranged in the receiving cavity, and the rolling portion is rollingly connected to the support portion; Wherein, the diameter of the rolling portion is greater than the depth of the accommodating cavity.

9. The backlight module according to claim 8, characterized in that: The rolling part is a sphere, and an opening is formed on a side of the accommodating cavity close to the rolling part, and a diameter of the opening is smaller than a diameter of the rolling part.

10. A display device, characterized in that: The invention comprises a display panel and a backlight module as claimed in any one of claims 1 to 9, wherein the backlight module is arranged on the backlight side of the display panel.

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