Diffusion plate support pillar and manufacturing method therefor, and backlight module

Abstract

The present application relates to the technical field of display. Provided are a diffusion plate support pillar and a manufacturing method therefor, and a backlight module, which aim to solve the problem in the related art of the presence of a shadow on a diffusion plate due to the provision of a diffusion plate support pillar. The diffusion plate support pillar comprises a support pillar body, wherein an opening is provided in the radial direction of the support pillar body, and one end of the support pillar body is configured to abut against a diffusion plate to support the diffusion plate.

Description

Diffusion plate support column and manufacturing method thereof, backlight module

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 12, 2023, with application number 202311704313.0 and application name “Diffusion plate support column and its manufacturing method, backlight module”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of display technology, and in particular to a diffusion plate support column and a manufacturing method thereof, and a backlight module. Background Art

[0003] Diffuser support columns are typically used to support the diffuser, maintaining a certain distance between the diffuser and the light source, thereby ensuring the stability of the diffuser. In related art, due to the optical properties of the diffuser support column material, the light beams emitted by the light source will interfere after passing through the diffuser support column. Technical issues

[0004] Uneven areas of light and dark will form on the diffuser, resulting in dark shadows, which will affect the uniformity of light output from the corresponding backlight module. Technical Solutions

[0005] The embodiments of the present application provide a diffuser plate support column, a manufacturing method thereof, and a backlight module, so as to solve the problem in the related art that the setting of the diffuser plate support column causes shadows to appear on the diffuser plate.

[0006] On the one hand, an embodiment of the present application provides a diffuser plate support column, which includes a support column body; an opening is provided on the support column body along its radial direction, and one end of the support column body is used to abut the diffuser plate to support the diffuser plate.

[0007] In some embodiments, the diffuser plate support column further includes a transparent filler, which is disposed in the opening. The refractive index of the transparent filler is different from that of the support column body.

[0008] In some embodiments, the transparent filler is diffusion particles.

[0009] In some embodiments, the diffusion plate support column further includes a blocking piece, and the blocking piece is fixed at the opening position of the opening.

[0010] In some embodiments, the opening is a blind hole.

[0011] In some embodiments, the inner diameter of the opening gradually decreases along the depth direction of the opening.

[0012] In some embodiments, there are multiple openings, and the multiple openings are arranged along the length direction of the support column body.

[0013] On the other hand, an embodiment of the present application provides a method for manufacturing a diffusion plate support column, which includes: providing a support column substrate; melting the support column substrate; injecting the support column substrate in a molten state into a mold, and cooling it to form a support column semi-finished product; demolding the support column semi-finished product; and opening an opening on the support column semi-finished product to form a diffusion plate support column.

[0014] In some embodiments, the method for manufacturing the diffusion plate support column further includes: filling the opening with diffusion particles, and fixing a transparent blocking piece at the opening position of the opening.

[0015] On the other hand, an embodiment of the present application provides a backlight module, which includes: a back panel, a light source, a diffuser plate and a diffuser plate support column, wherein the diffuser plate support column includes a support column body; an opening is provided on the support column body along its radial direction, one end of the support column body is used to abut the diffuser plate to support the diffuser plate, the light source is fixed on the back panel, one end of the diffuser plate support column is fixed on the back panel, and the other end of the diffuser plate support column abuts against the diffuser plate.

[0016] Technical Effects

[0017] The embodiment of the present application provides an opening on the support column body, and the opening contains air, so that part of the light emitted from the light source and entering the support column body will enter the opening, and this part of the light will be refracted; and when this part of the light passes through the opening and is emitted to the support column body, part of the light will be refracted and enter the support column body again, and the other part of the light will be totally reflected. As a result, the setting of the opening changes the original light path of the light, so that the light is more divergently irradiated to the diffuser plate, which is conducive to avoiding the generation of shadows, and further helps to improve the light uniformity of the corresponding backlight module. In addition, the production of the above-mentioned opening is very convenient, and its setting position is also very flexible. The opening can be accurately arranged through multiple tests, so as to mass-produce the diffuser plate support columns. For the produced diffuser plate support columns, it can very effectively overcome the generation of shadows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and beneficial effects of the present application apparent.

[0019] FIG1 is a cross-sectional structural diagram of a diffusion plate support column provided in some embodiments of the present application;

[0020] FIG2 is a cross-sectional structural diagram of a support column body provided in some embodiments of the present application;

[0021] FIG3 is a cross-sectional structural diagram of a support column body provided in some other embodiments of the present application;

[0022] FIG4 is a cross-sectional structural diagram of a support column body provided in some other embodiments of the present application;

[0023] FIG5 is a cross-sectional structural diagram of a support column body provided in some other embodiments of the present application;

[0024] FIG6 is a cross-sectional structural diagram of a support column body provided in some other embodiments of the present application;

[0025] FIG7 is a flow chart of a method for manufacturing a diffuser plate support column according to some embodiments of the present application;

[0026] FIG8 is a cross-sectional structural diagram of a backlight module provided in some embodiments of the present application.

[0027] Explanation of the main component symbols: 10. Diffuser plate support column; 11. Support column body; 12. Base; 20. Backlight module; 21. Back panel; 22. Light source; 23. Diffuser plate; 101. Opening; 102. Sealing part; 111. Main body; 112. Abutment part; 210. Circuit board. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0030] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0031] The use of "suitable for" or "configured to" in this application is intended to be open and inclusive language, and does not exclude devices that are adapted or configured to perform additional tasks or steps. In addition, the use of "based on" is intended to be open and inclusive, as a process, step, calculation, or other action that is "based on" one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0032] In this application, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described in this application as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that one of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes are not elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in this application.

[0033] In the related art, light beams emitted by the light source will interfere after passing through the support column of the diffusion plate, resulting in uneven light and dark areas on the diffusion plate, resulting in shadows, and affecting the light uniformity of the corresponding backlight module.

[0034] Based on this, some embodiments of the present disclosure provide a diffuser plate support column, as shown in Figures 1-6, the diffuser plate support column 10 includes a support column body 11, and an opening 101 is provided along the radial direction of the support column body 11. One end of the support column body 11 is used to abut the diffuser plate to support the diffuser plate.

[0035] Since the support column body 11 is provided with an opening 101, the opening 101 contains the same gas (e.g., air) as that in the environment used by the diffuser plate support column 10, and the refractive index of the gas is different from that of the support column body 11. This causes part of the light emitted from the light source and entering the support column body 11 to enter the opening 101, at which time this part of the light will be refracted; and when this part of the light passes through the opening 101 and is emitted toward the support column body 11, part of the light will be refracted and enter the support column body 11 again, while the other part of the light will be totally reflected. As a result, the provision of the opening 101 changes the original optical path of the light, allowing the light to be more divergently irradiated onto the diffuser plate, thereby helping to avoid the generation of shadows and further helping to improve the light output uniformity of the corresponding backlight module.

[0036] In addition, the above-mentioned openings 101 are very convenient to manufacture, and their setting positions are also very flexible. The openings 101 can be accurately arranged through multiple tests, thereby mass-producing the diffusion plate support columns. For the produced diffusion plate support columns, they can effectively overcome the generation of shadows.

[0037] It should be noted that the radial direction of the support column body 11 is perpendicular to the length (or height) direction of the support column body 11. In addition, the opening 101 only needs to be hollowed out in the radial direction of the support column body 11, and does not need to extend completely along the radial direction of the support column body 11.

[0038] In some embodiments, the opening 101 may be a through hole, that is, the opening 101 is provided through the support column body 11. This can increase the proportion of light entering the opening 101, so that the light can be diffused to the diffuser plate, thereby helping to avoid the generation of shadows.

[0039] In other embodiments, as shown in Figures 2-3, the opening 101 may be a blind hole, that is, the opening 101 does not penetrate the support column body 11. This helps to ensure the structural stability of the support column body 11 and prevents the support column body 11 from being easily broken at the location where the opening 101 is provided, thereby improving the support stability of the diffuser plate support column 10 for the diffuser plate.

[0040] In some examples, a plurality of openings 101 may be provided, wherein some of the openings 101 are through holes and others are blind holes.

[0041] In some embodiments, the inner diameters of the plurality of openings may be different. For example, the inner diameter of the through hole may be smaller than the inner diameter of the blind hole, which is beneficial to improving the structural stability of the support column body 11.

[0042] In some embodiments, as shown in FIG2 , the inner diameter of the opening 101 is uniform throughout its depth. This arrangement helps ensure the structural stability of the diffuser support column 10 and the strength of its support for the diffuser. Furthermore, the uniform inner diameter of the opening 101 facilitates setting the depth of the opening 101 to a greater value, thereby increasing the proportion of light entering the opening 101 and preventing the formation of shadows.

[0043] In other embodiments, as shown in FIG3 , the inner diameter of the opening 101 gradually decreases along the depth direction of the opening 101. This configuration provides more material support at the center of the diffuser plate support column 10, which can reduce the damage to the structural stability of the diffuser plate support column 10 caused by the opening 101, thereby ensuring the support strength of the diffuser plate support column 10 for the diffuser plate.

[0044] In some examples, a plurality of openings 101 may be provided, wherein the inner diameters of some openings 101 along their depth direction are uniform, and the inner diameters of other openings 101 along their depth direction gradually decrease.

[0045] In some embodiments, as shown in FIG1 , a plurality of openings 101 are provided, and the plurality of openings 101 are arranged along the length of the support column body 11 . This can increase the opening area of ​​the openings 101 and help ensure the structural stability of the diffuser plate support column 10 .

[0046] In some examples, the openings 101 may be evenly arranged along the length of the support column body 11 , which helps to further ensure the structural stability of the diffuser plate support column 10 .

[0047] In some examples, the above-mentioned openings 101 can also be arranged circumferentially along the support column body 11, that is, the openings 101 can be arranged in a spiral shape on the support column body 11. In this way, while ensuring the structural stability of the diffuser plate support column 10, it can also refract and totally reflect the surrounding light, thereby effectively avoiding the generation of shadows.

[0048] 1 , the support column body 11 includes a main body 111 and an abutting portion 112 connected to each other. The abutting portion 112 is configured to abut the diffuser plate at one end away from the main body 111. At least one of the main body 111 and the abutting portion 112 has an opening 101 along its radial direction.

[0049] Exemplarily, only the main body 111 is provided with the opening 101 ; or only the abutting portion 112 is provided with the opening 101 ; or both the main body 111 and the abutting portion 112 are provided with the opening 101 .

[0050] For ease of description, the following embodiments are described by taking the opening 101 being provided on the main body 111 as an example.

[0051] In some embodiments, the main body 111 is columnar, and one end surface of the columnar body is connected to the abutting portion 112 .

[0052] For example, the main body 111 may be cylindrical, so that the structure is more stable and scratches to the hands can be avoided during the picking process.

[0053] As another example, the main body 111 may also be in the shape of a quadrangular prism, a hexagonal prism, etc., which is not limited in the embodiments of the present disclosure.

[0054] In some examples, as shown in FIG. 2 , the opening 101 may extend in a direction perpendicular to a side surface of the main body 111 , which facilitates the fabrication of the opening 101 .

[0055] In other examples, as shown in FIG4 , an angle α is formed between the extension direction of the opening 101 and a side surface of the main body 111. The angle α is any angle between 0° and 90° or between 90° and 180°. That is, the angle α is any angle within the range of 0° to 180° except 0°, 90°, and 180°. This configuration facilitates flexible setting of the tilt angle of the opening 101 to accommodate the spacing between the light source and the diffuser support column 10, thereby helping to avoid the appearance of shadows.

[0056] In some other examples, as shown in Figure 5, the opening 101 includes multiple opening segments, wherein two opening segments extend in different directions. This arrangement allows the shape of the opening 101 to be flexibly arranged according to specific needs, thereby being more conducive to avoiding the appearance of shadows.

[0057] In some examples, a plurality of openings 101 may be provided, wherein some openings 101 may be in the configuration shown in FIG2 (i.e., the openings 101 are perpendicular to a side surface of the main body 111), and some openings 101 may be in the configuration shown in FIG4 (i.e., the openings 101 are inclined relative to a side surface of the main body 111). Of course, some openings 101 may also be in the configuration shown in FIG5 (i.e., the openings 101 are arranged in a zigzag manner).

[0058] In some embodiments, the abutting portion 112 may be in a truncated cone shape, so that the end of the abutting portion 112 abutting against the diffuser plate is flat, which can prevent the diffuser plate from being easily punctured when the abutting portion 112 abuts against the diffuser plate.

[0059] When the opening 101 is provided on the contact portion 112 , its arrangement can refer to the arrangement of the opening 101 on the main body 111 , which will not be described in detail here.

[0060] In some embodiments, the diffuser support column 10 further includes a transparent filler disposed within the opening 101. The filler has a refractive index different from that of the support column body 11. This configuration helps ensure that light is reflected and totally internally reflected as it passes through the opening 101. Transparent fillers with different refractive indices can be used as needed to adjust the light deflection angle, thereby helping to prevent shadows.

[0061] In some embodiments, as shown in FIG. 6 , the diffuser plate support column 10 further includes a blocking member 102 , which is fixed at the opening position of the opening 101 .

[0062] The blocking member 102 can stably fill the transparent filler in the opening 101 and prevent the transparent filler from slipping out of the opening 101 , thereby effectively ensuring that the transparent filler stably deflects light and effectively avoiding the generation of shadows.

[0063] In some examples, the blocking member 102 is a transparent blocking member, which can prevent light from being absorbed when passing through the blocking member 102, thereby ensuring that the light can be effectively emitted.

[0064] Exemplarily, the blocking member 102 may be transparent adhesive.

[0065] In some examples, the transparent filler may be a solid filler.

[0066] For example, the transparent filler can be diffusion particles. Since the position of the opening 101 can be flexibly arranged, the diffusion particles can be partially filled in the support column body 11, which is conducive to reducing production costs and improving the market competitiveness of the diffusion plate support column 10.

[0067] For example, the solid filler may be completely filled in the opening 101 , which is beneficial for stably and effectively deflecting the light, thereby achieving a good effect of avoiding the generation of shadows.

[0068] As another example, the solid filler may partially fill the opening 101, that is, the opening 101 may be partially filled with the solid filler and partially filled with air. In this way, the solid filler and the air may be used to deflect the light more times, thereby helping to avoid the generation of shadows.

[0069] In addition, when the transparent filler is a solid filler, the solid filler can also provide a certain supporting performance for the support column body 11, thereby improving the stability of the support column body 11 itself.

[0070] In other examples, the transparent fill may be a gas fill.

[0071] For example, the transparent filler can be nitrogen or other special gases, so as to achieve a good light deflection effect. Using a transparent blocking member to block the opening 101 can effectively prevent the gas filling in the opening 101 from escaping.

[0072] In yet other examples, the transparent filler may be a liquid filler.

[0073] For example, the transparent filler can be pure water or other liquids, so as to achieve a good light deflection effect. Using a transparent blocking member to block the opening 101 can effectively prevent the liquid filling in the opening 101 from flowing out.

[0074] When the transparent filler is a liquid filler, the liquid filler can also provide a certain supporting performance for the support column body 11 , thereby improving the stability of the support column body 11 itself.

[0075] In some examples, the transparent filler may also be a combination of any two or three of a solid filler, a gas filler, and a liquid filler, which will not be described in detail in the embodiments of the present disclosure.

[0076] In some embodiments, as shown in FIG. 1 , the diffuser plate support column 10 further includes a base 12 fixed to the other end of the support column body 11 (ie, the end of the main body 111 away from the abutting portion 112 ), and the base 12 is used to fix the diffuser plate support column 10 .

[0077] For example, the base 12 is provided with a mounting hole, and screws can be passed through the mounting hole to fix the base 12 , thereby completing the fixation of the diffuser plate support column 10 .

[0078] As another example, the base 12 may be adhered to a related component (such as a back plate) by adhesive, thereby completing the fixation of the diffuser plate support column 10 .

[0079] Some embodiments of the present disclosure further provide a method for manufacturing a diffusion plate support column, as shown in FIG7 , the method includes the following steps.

[0080] S10, providing a support column substrate.

[0081] For example, the support column substrate may be polymethylmethacrylate (PMMA) or polypropylene (PP) substrate particles.

[0082] S20, melting the support column substrate.

[0083] For example, the support column substrate may be placed in a melting furnace to keep the support column substrate in a molten state.

[0084] The temperature of the melting furnace can be set within a range of 180° C. to 220° C., and then the process of waiting is continued until the support column substrate is observed to be completely melted. Step S30 can be performed.

[0085] For example, the temperature of the melting furnace may be 180°C, 190°C, 200°C, 210°C, or 220°C.

[0086] S30, injecting the molten support column base material into the mold, and cooling it to form a semi-finished support column product.

[0087] The mold has a hollow portion, and the shape of the hollow portion is the same as the appearance shape of the above-mentioned diffuser plate support column 10. After the support column substrate is injected into the mold and cooled and formed, a support column semi-finished product without openings can be obtained.

[0088] In some examples, multiple molds can be provided so that multiple semi-finished support pillars can be produced in one batch, thereby improving the production efficiency of the diffuser plate support pillars.

[0089] S40, demoulding the semi-finished support column.

[0090] Since the semi-finished support column has cooled, it can be demoulded manually. Alternatively, a robotic arm can be used to demould the semi-finished support column.

[0091] S50 , opening holes in the semi-finished support column to form the diffuser plate support column 10 .

[0092] Through the above steps, the diffuser plate support column 10 can be stably manufactured. The diffuser plate support column 10 is provided with an opening, and the opening contains the same gas as the environment in which the diffuser plate support column 10 is used. Since the refractive index of air is different from that of the diffuser plate support column 10, part of the light emitted from the light source and entering the support column body will enter the opening, at which time this part of the light will be refracted; and when this part of the light passes through the opening and is emitted toward the diffuser plate support column 10, part of the light will be refracted and enter the diffuser plate support column 10 again, and the other part of the light will be totally reflected. Therefore, the setting of the opening changes the original optical path of the light, allowing the light to be more divergently irradiated to the diffuser plate, which is beneficial for avoiding the generation of shadows and further helps to improve the light uniformity of the corresponding backlight module.

[0093] In some embodiments, step S50 includes S51.

[0094] S51: Drill holes in the semi-finished support column using a drilling machine to form the diffuser plate support column 10. Drilling with a drilling machine can avoid the problem of uneven density of the diffuser plate support column 10 resulting from high pressure on the non-hole area of ​​the diffuser plate support column 10.

[0095] In some embodiments, the above method further includes S60 and S70.

[0096] S60, filling the opening with diffusion particles.

[0097] The diffusion particles have good light diffusion performance, which can effectively avoid the generation of shadows. At the same time, the diffusion particles also have certain supporting performance, which is beneficial to improving the overall structural stability of the diffusion plate support column 10.

[0098] For example, the diffusion particles may be PMMA microsphere diffusion particles.

[0099] S70: Fix a transparent blocking piece at the opening of the hole.

[0100] Exemplarily, the transparent sealing member may be transparent adhesive, and the opening of the opening may be sealed with the transparent adhesive so that the diffusion particles can be stably stored in the opening.

[0101] Some embodiments of the present disclosure also provide a backlight module. As shown in FIG8 , the backlight module 20 includes a backplate 21, a light source 22, a diffuser 23, and the aforementioned diffuser support column 10. The light source 22 is fixed to the backplate 21, and one end of the diffuser support column 10 is fixed to the backplate 21, with the other end of the diffuser support column 10 abutting against the diffuser 23. The diffuser support column 10 stabilizes the diffuser 23 above the light source 22, thereby facilitating the adjustment of light by the diffuser 23.

[0102] In some examples, an optical film layer may be further provided on the side of the diffuser 23 away from the light source 22 to further adjust the light of the light source 22 .

[0103] In some examples, the light source 22 may be fixed on a circuit board 210 on the back panel 21 and electrically connected to the circuit board 210 , so that the light source 22 may be turned on and off by the circuit board 210 .

[0104] A plurality of light sources 22 may be provided and distributed on the circuit board 210 in an array.

[0105] It should be noted that FIG. 8 only shows one diffuser plate support column 10 . During the specific installation process of the diffuser plate 23 , a plurality of diffuser plate support columns 10 may be provided.

[0106] For example, each diffuser plate support column 10 can be disposed in the middle of two adjacent light sources 22, or each diffuser plate support column 10 can be disposed in the center of four light sources 22. This ensures that the light emitted by the light source 22 can be fully emitted.

[0107] Because the diffuser support column 10 is provided with an opening 101 containing the same atmosphere as the environment in which the diffuser support column 10 is used, some of the light emitted from the light source and entering the support column body will enter the opening, where it will be refracted. When this light passes through the opening and strikes the diffuser support column 10, some of it will be refracted again and enter the diffuser support column 10, while the remaining part will be totally reflected. Thus, the opening changes the original optical path of the light, causing it to strike the diffuser more divergently, thereby preventing the formation of shadows and improving the uniformity of light output from the corresponding backlight module.

[0108] The above is a detailed introduction to the invention names provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A diffuser plate support column, wherein: include: The support column body is provided with an opening along the radial direction of the support column body, and one end of the support column body is used to abut against the diffusion plate to support the diffusion plate.

2. The diffuser plate support column according to claim 1, wherein: It also includes a transparent filler, which is arranged in the opening, and the refractive index of the transparent filler is different from the refractive index of the support column body.

3. The diffuser plate support column according to claim 2, wherein: The transparent filler is diffusion particles.

4. The diffuser plate support column according to claim 2, wherein: It also includes a blocking piece, which is fixed at the opening position of the opening.

5. The diffuser plate support column according to any one of claims 1 to 4, wherein: The opening is a blind hole.

6. The diffuser plate support column according to claim 5, wherein: Along the depth direction of the opening, the inner diameter of the opening gradually decreases.

7. The diffuser plate support column according to any one of claims 1 to 4, wherein: There are a plurality of openings, and the plurality of openings are arranged along the length direction of the support column body.

8. The diffuser plate support column according to claim 1, wherein: There are a plurality of openings, some of which are blind holes and the other are through holes.

9. The diffuser plate support column according to claim 8, wherein: The inner diameter of the through hole is smaller than the inner diameter of the blind hole.

10. The diffuser plate support column according to claim 1, wherein: The opening includes a plurality of opening segments, wherein the extension directions of two opening segments are different.

11. A method for manufacturing a diffuser plate support column, wherein: include: Providing a support column substrate; melting the support column substrate; Injecting the molten support column substrate into the mold and cooling it to form a support column semi-finished product; demoulding the semi-finished support column; and Openings are formed on the support column semi-finished product to form a diffuser plate support column.

12. The method for manufacturing a diffuser plate support column according to claim 11, wherein: Also includes: Filling the opening with diffusion particles, and A transparent blocking piece is fixed at the opening position of the opening.

13. The method for manufacturing a diffuser plate support column according to claim 11, wherein: The step of opening holes in the support column semi-finished product to form the diffuser plate support column comprises: A hole is drilled on the semi-finished support column by a drilling machine to form a diffuser plate support column.

14. A backlight module, wherein: include: A back panel, a light source, a diffuser plate and a diffuser plate support column, wherein the diffuser plate support column comprises a support column body; an opening is provided on the support column body along its radial direction, one end of the support column body is used to abut the diffuser plate to support the diffuser plate, the light source is fixed on the back panel, one end of the diffuser plate support column is fixed on the back panel, and the other end of the diffuser plate support column abuts against the diffuser plate.

15. The backlight module according to claim 14, wherein: The diffusion plate support column further includes a transparent filler, which is disposed in the opening, and the refractive index of the transparent filler is different from the refractive index of the support column body.

16. The backlight module according to claim 15, wherein: The transparent filler is diffusion particles.

17. The backlight module according to claim 15, wherein: The diffusion plate support column also includes a blocking piece, and the blocking piece is fixed at the opening position of the opening.

18. The backlight module according to any one of claims 14 to 17, wherein: The opening is a blind hole.

19. The backlight module according to claim 18, wherein: Along the depth direction of the opening, the inner diameter of the opening gradually decreases.

20. The backlight module according to any one of claims 14 to 17, wherein: There are a plurality of openings, and the plurality of openings are arranged along the length direction of the support column body.

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