Supporting column, backlight module and display device

Abstract

The utility model provides a supporting column, a backlight module and a display device, and relates to the technical field of display, the supporting column is used for supporting a diffusion plate, and the supporting column comprises a base, a bending part and a supporting part which are sequentially connected from bottom to top; wherein the lower end of the base is used for being fixed to a lamp panel, the bending part is of a bent columnar structure, the central axis of the base coincides with the central axis of the supporting part, and the cross sectional area of the bending part is smaller than the cross sectional area of the base and the cross sectional area of the supporting part. The supporting columns are arranged between the diffusion plate and the lamp panel, so that the diffusion plate can be flexibly supported in normal use, and when the diffusion plate is extruded, the bending parts of the supporting columns can be bent under the action of pressure, so that the light mixing distance between the diffusion plate and the lamp panel can be still kept under the condition that the diffusion plate is not damaged; therefore, the reliability of the backlight module can be improved, and the display quality can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a support column, a backlight module and a display device. BACKGROUND

[0002] Liquid Crystal Display (LCD) devices have low electromagnetic radiation, low power consumption, low heat generation, and thinness, and have become the mainstream display devices on the market. Backlight modules of LCD devices are mainly divided into side-in backlight modules and direct backlight modules according to the light-in method. Among them, the direct backlight module sets the light source on the front surface of the Open Cell (OC), and in order to achieve good backlight effect, a plurality of support columns are generally used to support the diffusion plate.

[0003] However, when the display surface of the display device is subjected to pressure or the display device vibrates and falls, if the distance between the support column and the diffusion plate is too close, the support column will scratch the diffusion plate, and even extrude the OC to cause the liquid crystal box to break, and if the distance between the support column and the diffusion plate is too far, it will cause the diffusion plate to collapse and cause light shadows, resulting in a decrease in the reliability of the backlight module. UTILITY MODEL CONTENT

[0004] Therefore, the present application provides a support column, a backlight module and a display device for supporting the diffusion plate and improving the reliability of the backlight module.

[0005] In a first aspect, an embodiment of the present application provides a support column for supporting a diffusion plate, the support column comprising: a base, a curved portion and a support portion connected in sequence from bottom to top;

[0006] The lower end of the base is used for fixing on a lamp plate.

[0007] The curved portion is a bent columnar structure, the center axis of the base coincides with the center axis of the support portion, and the cross-sectional area of the curved portion is smaller than the cross-sectional area of the base and the cross-sectional area of the support portion.

[0008] In a possible implementation of the first aspect, the curved portion comprises a first arc-shaped column, a second arc-shaped column and a third arc-shaped column connected in sequence from bottom to top.

[0009] The arc-shaped axis of the second arc-shaped column is tangent to the arc-shaped axes of the first arc-shaped column and the third arc-shaped column, respectively.

[0010] In a possible implementation of the first aspect, the radii of curvature of the first arc-shaped column, the second arc-shaped column and the third arc-shaped column gradually increase.

[0011] In a possible implementation manner of the first aspect, a cross-sectional area of the second arc-shaped column is smaller than cross-sectional areas of the first arc-shaped column and the third arc-shaped column.

[0012] In a possible implementation manner of the first aspect, a lower surface of the support portion is convexly curved.

[0013] The support portion has a circular cross section, and the cross-sectional area gradually increases from bottom to top, and the height of the base accounts for 20%-30% of the height of the support column.

[0014] In a possible implementation manner of the first aspect, the curved portion spirally extends upward around the central axis of the base.

[0015] In a possible implementation manner of the first aspect, the material of the support column is one of polyphthalamide, polyethylene and polyvinyl chloride.

[0016] In a possible implementation manner of the first aspect, the base is a frustum structure with a cross-sectional area gradually decreasing from bottom to top.

[0017] The base is fixed on the lamp panel by means of reflow soldering.

[0018] In the second aspect, the embodiments of the present application provide a backlight module, comprising: a lamp panel, a diffusion plate and the support column as described in the first aspect or any possible implementation manner of the first aspect.

[0019] The lamp panel is provided with a light emitter on a side close to the diffusion plate, the diffusion plate is configured to convert a point light source of the light emitter into a surface light source, and the support column is abutted between the lamp panel and the diffusion plate.

[0020] In the third aspect, the embodiments of the present application provide a display device, comprising: a liquid crystal panel and the backlight module as described in the second aspect, and the liquid crystal panel is located on a light emitting side of the backlight module.

[0021] The embodiment of the present application provides a support column for supporting a diffusion plate, the support column comprising: a base, a bending part and a support part connected in sequence from bottom to top; wherein the lower end of the base is used for being fixed on a lamp plate, the bending part is a bent columnar structure, the central axis of the base coincides with the central axis of the support part, and the cross-sectional area of the bending part is smaller than the cross-sectional area of the base and the cross-sectional area of the support part. By arranging the support column between the diffusion plate and the lamp plate, the diffusion plate can be flexibly supported in normal use, when the diffusion plate is pressed, the bending part of the support column can be bent under the action of the pressure, so that the diffusion plate and the lamp plate can still maintain the mixing distance without damaging the diffusion plate, thereby not only improving the reliability of the backlight module, but also improving the display quality.

[0022] The backlight module provided by the second aspect and the display device provided by the third aspect have the beneficial effects of the first aspect and the possible implementation manners of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The first perspective structural schematic diagram of the support column provided by the embodiment of the present application is shown in the figure;

[0024] Figure 2 The second perspective structural schematic diagram of the support column provided by the embodiment of the present application is shown in the figure;

[0025] Figure 3 The third perspective structural schematic diagram of the support column provided by the embodiment of the present application is shown in the figure;

[0026] Figure 4 The structural schematic diagram of the backlight module provided by the embodiment of the present application is shown in the figure;

[0027] Figure 5 The structural schematic diagram of the bending part provided by the embodiment of the present application is shown in the figure;

[0028] Figure 6 The experimental schematic diagram of the liquid crystal panel pressing the support column provided by the embodiment of the present application is shown in the figure;

[0029] Figure 7 The structural schematic diagram of the display device provided by the embodiment of the present application is shown in the figure.

[0030] Explanation of reference signs:

[0031] 1-support column; 11-base; 12-bending part; 121-first arc-shaped column; 122-second arc-shaped column; 123-third arc-shaped column; 13-support part;

[0032] 2-lamp plate; 21-light emitter; 3-diffusion plate; 4-back plate; 5-inner middle frame;

[0033] 100 - backlight module; 200 - liquid crystal panel. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0035] The liquid crystal display device can include a liquid crystal panel and a backlight module. The liquid crystal panel is a passive light-emitting element, and the backlight module must provide a light source with sufficient brightness and uniform distribution for the liquid crystal panel so that the liquid crystal panel can normally display an image. Therefore, the light-emitting effect of the backlight module will directly affect the display effect of the liquid crystal panel.

[0036] The backlight module can mainly include a diffusion plate and a lamp plate provided with a plurality of light-emitting bodies. The diffusion plate and the lamp plate have a certain cavity therebetween, so that the light-emitting bodies can uniformly hit light onto the diffusion plate, and then the light becomes a uniform area light source after the optical diffusion of the diffusion plate and is provided to the liquid crystal panel.

[0037] The size of the diffusion plate will increase with the increase of the size of the display device. In order to prevent the diffusion plate from deforming, such as collapsing and bending, at present, a support column is generally arranged between the lamp plate and the diffusion plate to support the diffusion plate.

[0038] However, in the existing backlight module, when the liquid crystal panel is pressed, it will continue to press the diffusion plate downward. Under the action of the pressure, the support column can scratch the diffusion plate, and the diffusion plate cannot move downward under the support of the support column, and the liquid crystal cell of the liquid crystal panel can also be broken under the action of the pressure, thereby causing red spots on the display picture, further affecting the display quality, and leading to the decrease of the reliability of the backlight module.

[0039] In view of this, the embodiments of the present application provide a support column for improving the reliability of the backlight module.

[0040] The technical solutions of the present application will be described in detail below in conjunction with the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, but cannot be understood as limiting the present application.

[0041] Figure 1 The first perspective structural diagram of the support column provided by the embodiments of the present application. Figure 2 The second perspective structural diagram of the support column provided by the embodiments of the present application. Figure 3A structural schematic diagram of a third perspective view of the support column is provided for the embodiments of the present application. Referring to Figures 1-3 The support column 1 can include, in order from bottom to top, a base 11, a curved portion 12, and a support portion 13. The central axis of the base 11 can coincide with the central axis of the support portion 13 to improve the stability and support reliability of the support column 1.

[0042] The material of the support column 1 can be one of polyphthalamide (PPA), polyethylene (PE), and polyvinyl chloride (PVC). On the one hand, this can enable the support column 1 to have good resilience and recovery after elastic deformation, and the support column 1 can quickly recover to the original shape and size when the pressure disappears, thereby prolonging the fatigue life of the support column 1. On the other hand, since PPA, PE, and PVC are all translucent, this can also reduce the obstruction of the support column 1 to light, thereby reducing the shadow area of the support column 1 on the diffusion plate, and further improving the display quality.

[0043] Figure 4 A structural schematic diagram of a backlight module is provided for the embodiments of the present application. Referring to Figures 1-4 The lamp plate 2 can be provided with a plurality of light emitting bodies 21 arranged at intervals. The light emitting bodies 21 can be selected to be light emitting diodes to reduce costs. The material of the lamp plate 2 can be selected to be an aluminum substrate or FR-4, which can not only reduce the weight of the lamp plate 2, but also improve the heat resistance of the lamp plate 2, thereby improving the service life of the lamp plate 2. The diffusion plate 3 can be located above the lamp plate 2 and arranged opposite to the lamp plate 2, so as to convert the point light source of the light emitting body 21 into a surface light source.

[0044] In some embodiments, the backlight module can further include a back plate 4 and an inner middle frame 5. The lamp plate 2 can be fixed on the back plate 4 in a fixing manner such as buckle fixing, heat-conducting adhesive pasting, or screw locking. For example, heat-conducting adhesive can be arranged on the contact surface of the lamp plate 2 and the back plate 4, so as to paste the lamp plate 2 on the back plate 4. This can facilitate the conduction of heat of the lamp plate 2 to the back plate 4, thereby improving the heat dissipation of the backlight module.

[0045] The inner middle frame 5 can surround the periphery of the lamp plate 2 and support the edge of the diffusion plate 3. By arranging the back plate 4 and the inner middle frame 5 at the edge of the diffusion plate 3, the diffusion plate 3 can be limited and the mixing distance can be maintained. In some embodiments, the back plate 4 and the inner middle frame 5 can be integrally formed to simplify the structure.

[0046] The lower end of the base 11 can be fixed on the lamp panel 2 and spaced apart from the light emitter 21. As an example, the light emitter 21 and the base 11 can be fixed on the lamp panel 2 by using the upper tin over-reflow welding method, so as to reduce the preparation difficulty and improve the preparation efficiency.

[0047] The shape of the base 11 can be a frustum structure, such as a prismatic frustum and a circular frustum, and the cross-sectional area gradually increases from top to bottom, so as to ensure that the base 11 has sufficient fixing area with the lamp panel 2, and also helps to ensure that the support column 1 can withstand the expected load pressure without damage, deformation and tilting, and reduces the blocking of the light rays of the light emitter 21 by the top end of the base 11, so as to improve the mixing light quality and the light uniformity of the light incident surface of the diffusion plate 3. In some embodiments, the height of the base 11 can account for 20%-30% of the height of the support column 1, so as to reduce the light blocking amount while ensuring the stability of the support column 1.

[0048] The bending part 12 can be a bent column structure, so that when the diffusion plate 3 is pressed against the support column 1, the bending part 12 can elastically deform in the transverse direction (perpendicular to the direction of the lamp panel 2 pointing to the diffusion plate 3) to buffer the pressure. The cross-sectional shape of the bending part 12 can be the same as the shape of the upper end surface of the base 11, so as to facilitate preparation. The cross-sectional area of the bending part 12 can be smaller than the cross-sectional area of the base 11 and the cross-sectional area of the support part 13, so that when subjected to pressure, the bending part 12 can bend in the transverse direction.

[0049] In an alternative implementation, Figure 5 The structure diagram of the bending part provided by the embodiments of the present application is shown in Figure 5 As an example, the arc axis of the second arc-shaped column 122 can be tangent to the arc axes of the first arc-shaped column 121 and the third arc-shaped column 123, respectively, so that when the diffusion plate 3 presses against the support column 1, the support column 1 can more effectively conduct the pressure to the lamp panel 2, so as to improve the reliability of the support column 1.

[0050] Further, the radii of curvature of the first arc-shaped column 121, the second arc-shaped column 122 and the third arc-shaped column 123 can gradually increase, that is, the curvatures of the first arc-shaped column 121, the second arc-shaped column 122 and the third arc-shaped column 123 gradually decrease, so as to better buffer and absorb the pressure from the diffusion plate 3, thereby improving the practicability and stability of the support column 1.

[0051] In some embodiments, the cross-sectional area of the second arc-shaped column 122 is smaller than the cross-sectional area of the first arc-shaped column 121 and the cross-sectional area of the third arc-shaped column 123, so as to facilitate the bending at the second arc-shaped column 122, thereby helping to disperse the stress of the support column 1 itself while effectively buffering the pressure, reducing the material damage of the support column 1, and the bent shape can also make more efficient use of space.

[0052] In some embodiments, the bending part 12 can spiral upward around the central axis of the base 11 to form a spring-like structure, so as to be able to utilize the elastic deformation of the bending part 12 to absorb and disperse the pressure from the diffusion plate 3. The direction of the spiral of the bending part 12 can be clockwise or counterclockwise, and the embodiments of the present application do not make special limitations thereon.

[0053] The lower surface of the bottom end of the support part 13 can be convex to form an arc surface shape, which can match the shape of the upper end of the bending part 12, so as to facilitate the conduction of pressure. The top end of the support part 13 can form a spherical structure, which on the one hand can further improve the stability of the support column 1, helping to reduce the shaking of the support column 1 caused by stress, and on the other hand, it can also make the stress of the support column 1 more dispersed, reduce the possibility of single-point stress of the support column 1, and ensure that the support column 1 can remain stable in various environments, thereby improving the load-bearing capacity, service life and applicability of the support column 1. Moreover, compared with the existing support column 1, since the top of the support part 13 is a smooth curve, the corners become round, which can reduce the possibility of scratching the diffusion plate 3 by the support part 13.

[0054] In some embodiments, the cross-sectional area of the support part 13 can also gradually increase from bottom to top, so as to increase the support area and help to flexibly support the diffusion plate 3. The support column 1 can be integrally formed by injection molding process to simplify the structure and manufacturing process, of course, the base 11, the bending part 12 and the support part 13 can also be connected by other ways, such as bonding, clamping or riveting. The distance between adjacent support columns 1 can be set according to actual needs, and the embodiments of the present application do not make special limitations thereon.

[0055] It should be noted that, in order to avoid the liquid crystal panel being crushed, the compression stroke of the support column 1 can be determined according to actual needs.

[0056] For example, referring to Figure 6 , when the liquid crystal panel 200 is pressed by a 10Kg object, the diameter of the top of the support part is 1mm, the initial distance between the liquid crystal panel 200 and the lamp plate 2 is 9.4mm (the initial height of the support column 1 is 6mm, the initial distance between the top end of the support column 1 and the liquid crystal panel 200 is 3.4mm), the material of the support column 1 is PPA, and the pressure applied on the liquid crystal panel 200 is F=10KGx9.81m / s2 = 98.1N, and the calculation formula of the support area of the support part is A = π(d / 2) 2 where d represents the top diameter of the support part, so that A = 2.5 x 10 -7 m2.

[0057] The support column 1 exhibits linear elastic behavior within the elastic range after being subjected to pressure, and can be determined according to Hooke's law as follows:

[0058] (1) σ = F / A;

[0059] (2) ε = σ / E;

[0060] where σ represents the stress in the liquid crystal panel 200, E represents the elastic modulus of PPA, which is 17000 MPa, and ε represents the strain. According to the above two formulas, ε = 0.023082 can be obtained.

[0061] Since the strain ε is the ratio of the length change amount of the support column 1 to the initial length, i.e. ε = Δh / L, where Δh represents the change amount (compression stroke) of the initial distance between the liquid crystal panel 200 and the lamp panel 2, and h represents the initial distance between the liquid crystal panel 200 and the lamp panel 2. Then the change amount Δh = 2.17 x 10 -4 m, i.e. 0.217 mm. Considering the process error and the fact that the bending moment on the cross section of the support column 1 and the deflection of the support column 1 may not be linearly related to the pressure at the moment when the support column 1 is suddenly subjected to force, etc., the value of the change amount Δh can be taken as 0.3 mm to improve the fault tolerance of the support column 1.

[0062] From the compression stroke, it can be seen that when the liquid crystal panel 200 is subjected to a pressure of 10 Kg, only a buffer gap of 0.3 mm is needed, and the support column 1 will not touch the lower surface of the liquid crystal panel 200, so the initial height of the support column 1 can be compressed to 5.7 mm when extruded. For ease of calculation, according to the Pythagorean theorem, when the included angle α is 30°, the chord length is 0.6 mm. Correspondingly, the support column 1 only needs to be bent and the chord is greater than 0.6 mm, which can ensure that the liquid crystal panel 200 will not be touched by the support column 1 while also ensuring the mixing distance of the light, so that the display quality of the liquid crystal panel 200 is also guaranteed.

[0063] The embodiment of the present application provides a support column for supporting a diffusion plate, the support column comprising: a base, a bending part and a support part connected in sequence from bottom to top; wherein the lower end of the base is used for being fixed on a lamp plate, the bending part is a bent columnar structure, the central axis of the base coincides with the central axis of the support part, and the cross-sectional area of the bending part is smaller than the cross-sectional area of the base and the cross-sectional area of the support part. By arranging the support column between the diffusion plate and the lamp plate, the diffusion plate can be flexibly supported in normal use, when the diffusion plate is extruded, the bending part of the support column can be bent under the action of the pressure, so that the diffusion plate and the lamp plate can still maintain the mixing distance between them without damaging the diffusion plate, thereby not only improving the reliability of the backlight module, but also improving the display quality.

[0064] Based on the same concept, the present application also provides a backlight module, which continues to refer to Figure 4 The backlight module 100 can comprise the support column 1, the lamp plate 2 and the diffusion plate 3 described in any of the above embodiments. Wherein the side of the lamp plate 2 close to the diffusion plate 3 can be provided with a light emitter 21, the diffusion plate 3 can convert the point light source of the light emitter 21 into a surface light source, and the support column 1 can abut between the lamp plate 2 and the diffusion plate 3 to provide support for the diffusion plate 3.

[0065] In some embodiments, the backlight module 100 can further comprise a back plate 4 and an inner middle frame 5, the lamp plate 2 can be fixed on the back plate 4, and the inner middle frame 5 can support the edge of the diffusion plate 3, which can be referred to the above embodiments.

[0066] Since the backlight module 100 in the embodiment comprises the support column 1 in the above embodiments, that is, the backlight module 100 in the embodiment has all the technical features and technical effects of the above support column 1 embodiments, which are specifically referred to the above embodiments and will not be repeated here.

[0067] The present application also provides a display device, Figure 7 The structural schematic diagram of the display device provided by the embodiment of the present application is shown in Figure 7 The display device can comprise the backlight module 100 and the liquid crystal panel 200 provided by the above embodiments, and the liquid crystal panel 200 is located on the light emitting side of the backlight module 100.

[0068] It should be noted that, Figure 7 Only the relative position relationship between the liquid crystal panel 200 and the backlight module 100 is schematically shown, and does not represent the actual film structure, the display device comprises the above backlight module 100, and has all the technical features of all the above backlight module 100 embodiments.

[0069] It should be understood that, in the description of the application and the appended claims, the terms "comprise", "contain", "have" and any variations thereof are intended to cover non-exclusive inclusions, and mean "including but not limited to", unless otherwise specifically indicated.

[0070] In the description of the present application, unless otherwise specified, " / " means that the objects before and after are in an "or" relationship, for example, A / B can mean A or B; "and / or" in the present application is used to describe the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural.

[0071] Also, in the description of the present application, unless otherwise specified, "multiple" means two or more than two. "At least one of the following" or similar expressions means any combination of the items, including any combination of single or multiple items.

[0072] In addition, in the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "vertical", "horizontal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0073] In the present application, unless otherwise specifically specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited, the specific meaning of the above terms in the present application can be understood according to the specific circumstances by those skilled in the art.

[0074] In addition, in the description of the present application and the appended claims, the terms "first", "second", and the like are used to distinguish similar objects, and are not to be construed as indicating or implying relative importance or a specific order or sequence, unless otherwise specifically indicated or implied by the context of usage. It is to be understood that the data so used can be interchanged, where appropriate, so that the embodiments described herein can be carried out in sequences other than those illustrated or otherwise described herein; features limited to "first", "second" can explicitly or implicitly include at least one such feature.

[0075] In the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any implementation or design scheme described herein as "exemplary" or "for example" is not necessarily to be construed as preferred or advantageous over other implementations or design schemes. Rather, the use of the words "exemplary" or "for example" is intended to present concepts in a particular manner.

[0076] In the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any implementation or design scheme described herein as "exemplary" or "for example" is not necessarily to be construed as preferred or advantageous over other implementations or design schemes. Rather, the use of the words "exemplary" or "for example" is intended to present concepts in a particular manner.

[0077] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; 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 present application.

Claims

1. A support column, characterized by, The support column for supporting a diffusion plate comprises a base, a curved portion and a support portion connected in sequence from bottom to top; The lower end of the base is used for fixing on a lamp panel; The curved portion is a bent columnar structure, the central axis of the base coincides with the central axis of the support portion, and the cross-sectional area of the curved portion is smaller than the cross-sectional area of the base and the cross-sectional area of the support portion.

2. The support column of claim 1, wherein, The curved portion comprises a first arc-shaped column, a second arc-shaped column and a third arc-shaped column connected in sequence from bottom to top; The arc-shaped axes of the second arc-shaped column are tangent to the arc-shaped axes of the first arc-shaped column and the third arc-shaped column, respectively.

3. The support column of claim 2, wherein, The radii of curvature of the first arc-shaped column, the second arc-shaped column and the third arc-shaped column gradually increase.

4. The support column of claim 2, wherein, The cross-sectional area of the second arc-shaped column is smaller than the cross-sectional area of the first arc-shaped column and the cross-sectional area of the third arc-shaped column.

5. The support column of claim 1, wherein, The lower surface of the support portion is convexly arc-shaped; The cross-section of the support portion is circular, the cross-sectional area gradually increases from bottom to top, and the height of the base accounts for 20%-30% of the height of the support column.

6. The support column of claim 1, wherein, The curved portion spirally upward around the central axis of the base.

7. The support column of claim 1, wherein, The material of the support column is one of polyphthalamide, polyethylene and polyvinyl chloride.

8. A support column according to any one of claims 1 to 7, characterised in that, The base is a truncated cone structure with a gradually decreasing cross-sectional area from bottom to top; The base is fixed on the lamp panel by reflow soldering.

9. A backlight module, characterized in that, Comprise: A lamp panel, a diffusion plate and the support column according to any one of claims 1-8; The side of the lamp panel close to the diffusion plate is provided with a light emitter, the diffusion plate is used for converting the point light source of the light emitter into a surface light source, and the support column abuts between the lamp panel and the diffusion plate.

10. A display device, characterized by comprising: Comprise: A liquid crystal panel and the backlight module according to claim 9, and the liquid crystal panel is located on the light emitting side of the backlight module.

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