CN219122547U

CN219122547U - Backlight module and display device

Info

Publication number: CN219122547U
Application number: CN202223458895.2U
Authority: CN
Inventors: 代海龙; 马骋
Original assignee: BOE Technology Group Co Ltd; K Tronics Suzhou Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; K Tronics Suzhou Technology Co Ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-06-02
Anticipated expiration: 2032-12-23

Abstract

The utility model relates to a backlight module, which comprises a back plate, a reflecting sheet, supporting columns and a diffusion plate, wherein the reflecting sheet is arranged between the back plate and the diffusion plate, the supporting columns for supporting the diffusion plate are adhered to the first surface of the reflecting sheet facing the diffusion plate, and a positioning structure for positioning the supporting columns is arranged on the first surface. The utility model also relates to a display device. The support column is arranged on the reflecting plate, and the installation position of the support column can be rapidly identified through the arrangement of the positioning structure on the reflecting plate, so that the efficiency is improved.

Description

Backlight module and display device

Technical Field

The utility model relates to the technical field of manufacturing of display products, in particular to a display device.

Background

With the high-speed development of the technology of liquid crystal display devices, in order to meet the ultra-thin device form, the light mixing distance value of the direct type backlight module gradually tends to be thin. However, the shadow defect becomes more obvious as the light mixing distance is smaller, and the image quality is deteriorated, so that the light mixing distance value is ensured by arranging the support columns. At present, the support column is fixed on the backboard through a screw fixing mode and the like, and various problems exist.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a backlight module and a display device, which solve the problems that the installation position of a support column is difficult to identify and is easy to leak.

In order to achieve the above purpose, the technical scheme adopted by the embodiment of the utility model is as follows: the utility model provides a backlight unit, includes backplate, reflector plate, support column and diffuser plate, the backplate with be provided with between the diffuser plate the reflector plate, the reflector plate orientation the first surface bonding of diffuser plate is provided with and is used for supporting the support column of diffuser plate, just be provided with on the first surface and be used for fixing a position the location structure of support column.

Optionally, the support column includes the base and set up in supporting part on the base, the location structure includes the site pattern structure that adopts printing ink printing to form, the shape of site pattern structure is in line with the shape of the orthographic projection of base on the reflector plate.

Optionally, the lattice point pattern structure is a pattern structure with directional directivity, so as to limit the installation direction of the support columns.

Optionally, the dot pattern structure includes a plurality of ink dots disposed at intervals.

Optionally, at least one of the ink dots is shaped as a pattern structure having directional directivity to define a mounting direction of the support column.

Optionally, an auxiliary positioning structure is arranged in the central area of the dot pattern structure.

Optionally, the dot pattern structure includes a plurality of ink dots that the interval set up, the auxiliary positioning structure includes the auxiliary ink dot that sets up in the center of dot pattern structure, the area of auxiliary ink dot orthographic projection on the reflector plate is greater than the area of dot pattern structure the orthographic projection of ink dot on the reflector plate.

Optionally, the supporting part is a triangle plate structure, the bottom edge of the triangle plate structure is connected with the base, and the vertex of the triangle plate structure is used for supporting the diffusion plate.

Optionally, the support column is made of transparent material.

Optionally, a plurality of support columns are arranged on the reflector plate in an array manner, a plurality of light sources are arranged on the reflector plate in an array manner, at least one row of light sources are arranged between two adjacent rows of support columns, and/or at least one column of light sources are arranged between two adjacent columns of support columns.

The embodiment of the utility model also provides a display device which comprises the backlight module.

The beneficial effects of the utility model are as follows: the support column is arranged on the reflecting plate, and the installation position of the support column can be rapidly identified through the arrangement of the positioning structure on the reflecting plate, so that the efficiency is improved.

Drawings

Fig. 1 is a schematic diagram of a backlight module according to an embodiment of the utility model;

FIG. 2 is a diagram showing a first alignment and assembly state of the support column and the positioning structure according to the embodiment of the utility model;

FIG. 3 is a diagram showing a second alignment assembly state of the support column and the positioning structure according to the embodiment of the utility model;

fig. 4 is a partial schematic view of a reflection sheet in an embodiment of the present utility model.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the utility model, fall within the scope of protection of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1-4, the present embodiment provides a backlight module, including a back plate 10, a reflective sheet 30, support columns 40 and a diffusion plate 50, wherein the reflective sheet 30 is disposed between the back plate 10 and the diffusion plate 50, the support columns 40 for supporting the diffusion plate 50 are adhered to a first surface of the reflective sheet 30 facing the diffusion plate 50, and positioning structures 310 for positioning the support columns 40 are disposed on the first surface.

In the conventional art, the support column 40 needs to be installed by punching holes in the back plate 10, so that the support column 40 is installed on the back plate 10 in a screw fixing manner, the number of the punched holes is large, the punched holes are generally small, the recognition difficulty is high, and the installation of the support column 40 is easy to be lost. In the embodiment that the reflector plate 30 and the support column 40 are arranged on the same layer, the reflector plate 30 or the support column 40 needs to be avoided, so that the installation difficulty is increased, in the embodiment that the support column 40 is arranged on the reflector plate 30, the reflector plate 30 is also provided with openings, the openings on the reflector plate 30 need to be arranged corresponding to the openings on the backboard 10, the installation difficulty is also improved, and the efficiency is reduced. In this embodiment, the support columns 40 are directly and fixedly connected to the reflective sheet 30 in a bonding manner, which is simple and fast, and improves the efficiency. And the positioning structure 310 is arranged on the reflecting sheet 30, so that the installation position can be conveniently identified, the installation efficiency is further improved, and the occurrence of the installation leakage condition of the supporting column 40 is avoided.

The connection between the reflective sheet 30 and the support column 40 may be by double-sided adhesive bonding, or may be by dispensing, which is not limited herein. For example, as shown in fig. 2, the reflective sheet 30 and the support post 40 are bonded together by a double-sided tape 402.

In an exemplary embodiment, the support column 40 includes a base 400 and a support part 401 disposed on the base 400, and the positioning structure 310 includes a dot pattern structure formed by printing with ink, and the shape of the dot pattern structure corresponds to the shape of the orthographic projection of the base 400 on the reflective sheet 30.

The positioning structure 310 is formed by using an ink printing manner, so that the positioning structure 310 is simple and quick, the shape of the dot pattern structure is consistent with the shape of the orthographic projection of the base 400 on the reflector 30, that is, the shape of the dot pattern structure is consistent with the outline shape of the base 400, and the positioning structure 310 is easier to identify and is convenient to install compared with the arrangement of a smaller screw mounting hole.

Moreover, in the mounting manner of screws and the like in the conventional technology, the mounting number and the mounting position of the support columns 40 are relatively large, if the adjustment is required, the back plate 10 needs to be repaired, the cost is high, the situation that the position cannot be adjusted due to structural interference easily occurs, in this embodiment, the support columns 40 are arranged on the reflecting sheet 30 in a bonding manner, the positioning structure 310 is a dot pattern structure formed on the reflecting sheet 30 in an ink printing manner, if the mounting number or the position of the support columns 40 needs to be adjusted, only the position of the dot pattern structure needs to be adjusted, the back plate 10 does not need to be repaired, and the method is simple and flexible, and the changing cost is low.

Illustratively, the dot pattern structure includes a plurality of spaced apart ink dots 301. The net point pattern structure is integrated into zero, and the net point pattern structure is arranged in a scattered manner, so that the shielding area of the net point pattern structure is reduced.

In an exemplary embodiment, the dot pattern structure is a pattern structure having directional directivity to define the installation direction of the support columns 40.

The mounting manner of the support column 40 in the conventional technology has no referent mounting direction, and if the support column 40 is reversely placed or is displaced, a shadow is generated, which affects the picture quality. In this embodiment, the dot pattern structure is a pattern structure with directional directivity, which can indicate the installation direction, so as to facilitate the installation of the support column 40, for example, the dot pattern structure is a bar, a rectangle, an ellipse, etc., and the length extension direction of the dot pattern is consistent with the length extension square of the base 400 of the support column 40.

If the shape of the dot pattern structure matches the shape of the base 400, if the base 400 is a pattern having directivity such as a rectangle, the dot pattern structure may be directly formed into a corresponding pattern, and if the shape of the base 400 is a square, a circle, or the like, and if the shape of the dot pattern structure matches the shape of the orthographic projection of the base 400 on the reflective sheet 30, the dot pattern structure may not have directivity, and at this time, a protrusion (which is formed by surrounding a plurality of ink dots 301 disposed at intervals, may be disposed inside, or outside the dot pattern structure, and all the dot pattern structures are disposed at the same positions so that the indicated mounting directions are the same) may be added to the dot pattern structure, for example, in one embodiment of the present embodiment, at least one of the ink dots 301 may be formed into a pattern structure having directivity so as to define the mounting direction of the support post 40.

Illustratively, the shape of at least one of the ink dots 301 may be a bar, oval, diamond, arrow shape, or the like.

Note that, in the case where the shape of the ink dots 301 having 2 or more dots is a pattern structure having directional directivity, the shape of the ink dots 301 having 2 or more dots is the same, i.e., the direction is the same, for example, the ink dots 301 having 2 or more dots are each a stripe structure, and the length extending directions of all stripe structures are parallel; more than 2 ink dots 301 are all of oval structures, and the extending directions of the major axes of all the oval structures are parallel.

When the base 400 of the support column 40 is shaped like a bar, the longitudinal extending direction or the width extending direction thereof need only be recognized, and the forward and reverse directions need not be distinguished, and when the base 400 is shaped like a trapezoid, the dot pattern structure may indicate the forward and reverse directions, for example, the dot pattern structure is shaped like a trapezoid conforming to the orthographic projection shape of the base 400 on the reflection sheet 30.

In an exemplary embodiment, the central region of the dot pattern structure is provided with an auxiliary positioning structure 310.

The backlight module further includes a light source 20, for example, an LED light source 20, where the LED light source 20 includes a substrate and a lamp bead disposed on the substrate, and in order to facilitate the installation of the light source 20, the reflector 30 is also provided with a light source 20 positioning structure 310, and at this time, the reflector 30 is simultaneously provided with a positioning structure 310 for positioning and installing the support column 40, and a light source 20 positioning structure 310 for positioning and installing the light source 20, and in this case, in order to facilitate the identification of the installation position of the support column 40, in this embodiment, the auxiliary positioning structure 310 is added. And the auxiliary positioning structure 310 is disposed in the central area of the halftone dot pattern structure, and does not occupy other space except the installation position of the support columns 40.

It should be noted that, the dot pattern structure is in a shape that matches the shape of the orthographic projection of the base 400 of the supporting column 40 on the reflector 30, and the dot pattern structure corresponds to the outline of the orthographic projection of the base 400 on the reflector 30, that is, the dot pattern structure is a hollow annular structure formed by surrounding a plurality of ink dots 301 arranged at intervals, and the auxiliary positioning structure 310 is arranged in the central area of the dot pattern structure, so that the installation position of the supporting column 40 can be identified in an auxiliary manner, and interference of other structures can not be caused.

In an exemplary embodiment, the dot pattern structure includes a plurality of ink dots 301 disposed at intervals, the auxiliary positioning structure 310 includes an auxiliary ink dot 302 disposed at the center of the dot pattern structure, and an area of an orthographic projection of the auxiliary ink dot 302 on the reflective sheet 30 is larger than an area of an orthographic projection of the ink dot 301 of the dot pattern structure on the reflective sheet 30.

The area of the orthographic projection of the auxiliary ink dots 302 on the reflector plate 30 is larger than the area of the orthographic projection of the ink dots 301 of the dot pattern structure on the reflector plate 30, which is beneficial to the identification of the positioning structure 310. Illustratively, the diameter of the orthographic projection of the plurality of ink dots 301 forming the dot pattern structure on the reflective sheet 30 is 0.1-1.0mm, and the diameter of the orthographic projection of the auxiliary ink dots 302 on the reflective sheet 30 is 0.5-5mm, but not limited thereto.

By way of example, the auxiliary ink dots 302 may be circular, oval, etc.

The auxiliary positioning structure 310 may be a through hole formed in a central area of the mesh-point pattern structure, but is not limited thereto.

For example, the thickness of the plurality of ink dots 302 (the thickness in the direction perpendicular to the reflective sheet) is 0.1-1.0mm, so that the dot pattern structure formed by surrounding the plurality of ink dots 301 has a positioning and identifying function, and meanwhile, a limiting function can be achieved, that is, the plurality of ink dots 301302 have a certain thickness, so that the dot pattern structure forms a mounting groove, and the support columns 4040 are mounted in the dot pattern structure.

Illustratively, the area of the reflective sheet 30 located in the halftone pattern structure is provided with a clamping groove, the connection surface of the base and the reflective sheet 30 is provided with a protrusion, the protrusion cooperates with the clamping groove to limit the connection between the reflective sheet 30 and the support column 40, and the thickness of the protrusion in the direction perpendicular to the connection surface is smaller than the thickness of the clamping groove in the direction perpendicular to the reflective sheet 30, so that a gap is avoided between the support column 40 and the reflective sheet 30, and the connection stability between the reflective sheet 30 and the support column 40 is ensured.

The connection surface of the base and the reflection sheet 30 is parallel to the reflection sheet 30.

In an exemplary embodiment, the support part 401 is a triangle plate structure, the base of which is connected to the base 400, and the vertex of which is used to support the diffusion plate 50.

The supporting part 401 is designed into a triangular plate-shaped structure, and the triangular structure has the advantages of stability, firmness, pressure resistance and the like, and can effectively stabilize the structure of the supporting part 401. The bottom edge of the supporting portion 401 is connected to the top surface (the surface far away from the reflecting sheet 30) of the base 400, and the triangular plate-shaped structure can simultaneously avoid the light emitted by the light source 20 from being reflected towards the direction of the back plate 10 after being irradiated to the surface of the supporting portion 401, so that the light transmission direction is ensured.

The vertex corresponding to the bottom edge of the supporting portion 401 is used for propping against the diffusion plate 50, and the vertex corresponding to the vertex is an arc angle, so that the top end of the supporting portion 401 is ensured to be a smooth arc, damage to the diffusion plate 50 caused by the supporting portion 401 is avoided, and stability of supporting the diffusion plate 50 is improved.

Illustratively, the two sides of the triangular plate-shaped structure adjacent to the bottom edge include a first portion and a second portion along a direction away from the base 400, and the curvature of the second portion gradually increases along a direction away from the base 400, so that an end of the triangular plate-shaped structure away from the base 400 is a rounded end, thereby avoiding damage to the diffusion plate 50.

Illustratively, a buffer structure is disposed between the support portion 401 and the base 400, the buffer structure includes a first support plate parallel to the reflective sheet 30, two side plates at two ends of the length of the first support plate in the extending direction, a gap is formed between the first support plate and the base 400, two side plates are connected with the base 400, a buffer space is formed between the buffer structure and the base 400, and when the support portion 401 is pressed by the diffusion plate 50, the diffusion plate 50 is prevented from being scratched by the support columns 40 due to the fact that the buffer structure deforms into the buffer space to play a role in buffering, and thus the diffusion plate 50 is prevented from being scratched when the diffusion plate 50 is collapsed downward due to gravity or the like.

In an exemplary embodiment, the support columns 40 are made of transparent materials, such as acrylic, so as to improve light transmittance and avoid the occurrence of shadows.

The support portion 401 and the base 400 are detachably connected together, so that the support portion 401 can be replaced conveniently, and the support portion is suitable for backlight modules with different light mixing distances, and the application range of the support column 40 is improved.

In an exemplary embodiment, a plurality of the support columns 40 are arranged on the reflective sheet 30 in an array manner, and a plurality of the light sources 20 are arranged on the reflective sheet 30 in an array manner, at least one row of the light sources 20 is arranged between two adjacent rows of the support columns 40, and/or at least one column of the light sources 20 is arranged between two adjacent columns of the support columns 40.

The number and distribution forms of the support columns 40 may be set according to actual needs, for example, a row of support columns 40 is disposed between two adjacent rows of the light sources 20, a row of light sources including a first row of light sources disposed near the edge of the reflective sheet 30 and a plurality of second rows of light sources distributed in the middle of the reflective sheet 30 are disposed in the row direction of the light sources 20, one side of the first row of light sources near the second row of light sources is provided with one row of support columns 40, and in the row direction of the light sources 20, every other two rows of light sources 20 are provided with one row of support columns 40, that is, two rows of light sources 20 are disposed between two adjacent rows of support columns 40.

The support columns 40 and the light sources 20 are arranged at intervals, the same column of the support columns 40 is arranged at intervals, and the same row of the support columns 40 is arranged at intervals.

Illustratively, the reflective sheet 30 has adjacent first row light sources and first row support columns distributed thereon, and an orthographic projection of one of the support columns 40 of the first row of support columns on the first row light sources is located between two adjacent light sources 20 of the first row light sources.

Illustratively, the reflective sheet 30 has a third adjacent column of light sources and a first column of support posts distributed thereon, and the orthographic projection of one support post 40 of the first column of support posts on the third column of light sources is located between two adjacent light sources 20 of the third column of light sources.

It should be noted that, a row or a column of the support columns 40 near the edge of the reflective sheet 30 is disposed on a side of the reflective sheet 30 near the edge, and a row or a column of the light sources 20 is disposed on the side of the reflective sheet, so as to ensure uniformity of light.

An optical film 60 is disposed on a side of the diffusion plate 50 away from the back plate 10, and a display panel 70 is disposed on a side of the optical film 60 away from the back plate 10.

The display device may be: any product or component with display function such as a liquid crystal television, a liquid crystal display, a digital photo frame, a mobile phone, a tablet personal computer and the like, wherein the display device further comprises a flexible circuit board, a printed circuit board and a backboard.

It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present utility model, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the utility model, and are also considered to be within the scope of the utility model.

Claims

1. The utility model provides a backlight unit, includes backplate, reflector plate, support column and diffuser plate, its characterized in that, the backplate with be provided with between the diffuser plate the reflector plate, the reflector plate orientation the first surface bonding of diffuser plate is provided with and is used for supporting the support column of diffuser plate, just be provided with on the first surface and be used for fixing a position the location structure of support column.

2. A backlight module according to claim 1, wherein the support column comprises a base and a support portion disposed on the base, the positioning structure comprises a dot pattern structure formed by printing ink, and the shape of the dot pattern structure conforms to the shape of the orthographic projection of the base on the reflector plate.

3. A backlight module according to claim 2, wherein the dot pattern structure is a pattern structure having directional directivity to define the installation direction of the support posts.

4. A backlight module according to claim 2, wherein the dot pattern structure comprises a plurality of spaced apart ink dots.

5. A backlight module according to claim 4, wherein at least one of the ink dots is shaped as a pattern structure having directional directivity to define the mounting direction of the support post.

6. A backlight module according to claim 4, wherein the central region of the dot pattern structure is provided with an auxiliary positioning structure.

7. A backlight module according to claim 6, wherein the dot pattern structure comprises a plurality of ink dots arranged at intervals, the auxiliary positioning structure comprises auxiliary ink dots arranged at the center of the dot pattern structure, and the area of orthographic projection of the auxiliary ink dots on the reflecting sheet is larger than that of orthographic projection of the ink dots of the dot pattern structure on the reflecting sheet.

8. A backlight module according to claim 4, wherein the supporting part is a triangular plate-shaped structure, a bottom side of the triangular plate-shaped structure is connected with the base, and a vertex of the triangular plate-shaped structure is used for supporting the diffusion plate.

9. A backlight module according to claim 1, wherein the support posts are made of a transparent material.

10. A backlight module according to claim 1, wherein a plurality of the support columns are arranged on the reflector plate in an array manner, and a plurality of light sources are arranged on the reflector plate in an array manner, at least one row of the light sources is arranged between two adjacent rows of the support columns, and/or at least one column of the light sources is arranged between two adjacent columns of the support columns.

11. A display device comprising a backlight module according to any one of claims 1-10.