Backlight module capable of preventing foreign matter from invading
By setting a weak adhesive layer on the folded edge of the lower iron frame of the backlight module to fix the protective film, the problem of foreign objects entering the backlight module is solved, and a more stable display effect is achieved.
Patent Information
- Application Number
- CN202421968429.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-14
AI Technical Summary
In the ultra-narrow backlight module, due to insufficient space on the sides, the protective film on the surface cannot be fixed, which may cause foreign objects to enter the backlight module during transportation or transportation, resulting in bad white balls and uneven display.
By providing a weak adhesive layer on the folded edge of the lower iron frame, the protective film abuts the upper surface and side surface of the folded edge, and is pasted and fixed by the weak adhesive layer and the side surface of the folded edge, so as to better fix the protective film and prevent foreign matter from entering.
It effectively prevents foreign objects from entering the backlight module due to vibration during transportation or handling, and avoids the appearance of white balls and uneven displays after the backlight module and LCD screen are assembled.
Smart Images
Figure CN222965544U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of liquid crystal display, and more specifically, to a backlight module for preventing foreign matters from invading. Background Art
[0002] In the structure of a backlight module with ultra-narrow borders, since there is not enough space on the side to set up a rubber frame and light-shielding glue, the three sides of the surface protective film cannot be fixed. This will cause the protective film to be instantaneously separated from the film material and the iron frame due to vibration during the transportation or handling of the backlight module. There will be a gap between the protective film and the iron frame, and foreign matters will enter the internal film material of the backlight module through this gap. After the backlight module is assembled with the liquid crystal display screen and lit, there will be defects such as white clusters and uneven display. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is how to better fix the surface protective film, prevent foreign matters from entering the internal film material of the backlight module, and prevent defects such as white clusters and uneven display after the backlight module is assembled with the liquid crystal display screen and lit.
[0004] The technical problem to be solved by the utility model is realized through the following technical solutions:
[0005] To solve the above technical problem, the utility model provides a backlight module for preventing foreign matters from invading, which includes a lower iron frame, a reflective sheet, a light guide plate, an optical film group, and a protective film. The lower iron frame includes a bottom plate and a folded edge formed by bending the edge of the bottom plate upward; the reflective sheet is arranged above the bottom plate; the light guide plate is arranged above the reflective sheet; the optical film group is arranged above the light guide plate; the protective film covers above the optical film group. The protective film abuts against the upper surface and the side surface of the folded edge. A weak adhesive layer is arranged on the inner surface of the protective film located on the side surface of the folded edge, and the protective film is adhesively fixed to the side surface of the folded edge through the weak adhesive layer.
[0006] As a preferred embodiment of the backlight module for preventing foreign matters from invading provided by the utility model, a semi-tangent line is arranged on the protective film located at the outer edge of the folded edge.
[0007] As a preferred embodiment of the backlight module for preventing foreign matters from invading provided by the utility model, the protective film is a high-transparency protective film.
[0008] As a preferred embodiment of the backlight module for preventing foreign matters from invading provided by the utility model, the transmittance of the protective film is 90%-99%.
[0009] As a preferred embodiment of the backlight module for preventing foreign objects from intrusion provided by the present utility model, at least one glue column is provided on the upper surface of the light guide plate, positioning holes corresponding to the glue columns are formed in the optical film group, and the optical film group is sleeved on the glue columns.
[0010] As a preferred embodiment of the backlight module for preventing foreign objects from intrusion provided by the present utility model, a ring groove surrounding the glue column is provided on the upper surface of the light guide plate at the connection between the light guide plate and the glue column.
[0011] As a preferred embodiment of the backlight module for preventing foreign objects from intrusion provided by the present utility model, the cross-sectional shape of the ring groove is square, arc-shaped or triangular.
[0012] As a preferred embodiment of the backlight module for preventing foreign objects from intrusion provided by the present utility model, the glue column and the light guide plate are integrally formed.
[0013] As a preferred embodiment of the backlight module for preventing foreign objects from intrusion provided by the present utility model, a guiding portion with a diameter gradually increasing from top to bottom is provided at the top of the glue column.
[0014] As a preferred embodiment of the backlight module for preventing foreign objects from intrusion provided by the present utility model, the guiding portion is a chamfer or a fillet.
[0015] The present utility model has the following beneficial effects:
[0016] Since the protective film abuts against the upper surface and the side surface of the folded edge and is fixedly adhered to the side surface of the folded edge through the weak adhesive layer, that is, the outer shape extension ratio of the protective film is larger than that of the lower iron frame, the protective film exceeding the outer shape of the lower iron frame is bent to the side of the lower iron frame, and the surface of the protective film is coated with a weak adhesive layer, and the weak adhesive layer is fixed to the side of the lower iron frame, so that the protective film is better fixed, avoiding foreign objects from entering the internal film material of the backlight module due to vibration during transportation or handling, and preventing defects such as white spots and uneven display from occurring when the backlight module is assembled with the liquid crystal display screen and then lit. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the solutions in the present application, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0018] Figure 1 It is a schematic structural diagram of a backlight module for preventing foreign objects from intrusion provided by the present utility model.
[0019] Figure 2 is Figure 1 a schematic structural view of the protective film in
[0020] Figure 3 is Figure 1 a schematic improved structural view of the light guide plate in
[0021] Explanation of the reference numerals in the attached drawings:
[0022] lower iron frame 1; reflector 2; light guide plate 3; optical film group 4; protective film 5; bottom plate 11; folded edge 12; weakly adhesive layer 51;
[0023] half tangent line 52; glue column 31; annular groove 32; guiding portion 33. Specific embodiments
[0024] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0025] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. 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 utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present utility model.
[0026] In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third" may explicitly or implicitly include at least one of the features. In the description of the present utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0027] The utility model provides a backlight module for preventing foreign objects from intrusion, which comprises a lower iron frame, a reflective sheet, a light guide plate, an optical film group and a protective film. The lower iron frame comprises a bottom plate and a folded edge formed by bending the edge of the bottom plate upward; the reflective sheet is arranged above the bottom plate; the light guide plate is arranged above the reflective sheet; the optical film group is arranged above the light guide plate; the protective film covers above the optical film group, the protective film abuts against the upper surface and the side surface of the folded edge, a weak adhesive layer is arranged on the inner surface of the protective film located on the side surface of the folded edge, and the protective film is fixedly adhered to the side surface of the folded edge through the weak adhesive layer.
[0028] Since the protective film abuts against the upper surface and the side surface of the folded edge and is fixedly adhered to the side surface of the folded edge through the weak adhesive layer, that is, the outer shape extension of the protective film is larger than that of the lower iron frame, the protective film exceeding the outer shape of the lower iron frame is bent to the side of the lower iron frame, the surface of the protective film is coated with a weak adhesive layer, and the weak adhesive layer is fixed to the side of the lower iron frame, so that the protective film is better fixed, and foreign objects are prevented from entering the internal film material of the backlight module due to vibration during transportation or handling, and poor phenomena such as white masses and uneven display do not occur when the backlight module is assembled with the liquid crystal display screen and then lit for display.
[0029] In order to enable the personnel in the technical field to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the drawings. The present utility model will be described in detail below with reference to the drawings and embodiments. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.
[0030] Please refer to Figure 1, A backlight module for preventing foreign objects from entering provided by the present utility model, which includes a lower iron frame 1, a reflective sheet 2, a light guide plate 3, an optical film group 4, and a protective film 5. The lower iron frame 1 includes a bottom plate 11 and a folded edge 12, and the folded edge 12 is formed by bending the edge of the bottom plate 11 upward; the reflective sheet 2 is arranged above the bottom plate 11; the light guide plate 3 is arranged above the reflective sheet 2; the optical film group 4 is arranged above the light guide plate 3; the protective film 5 covers above the optical film group 4, and the protective film 5 abuts against the upper surface and the side surface of the folded edge 12. A weak adhesive layer 51 is arranged on the inner surface of the protective film 5 located on the side surface of the folded edge 12, and the protective film 5 is fixedly adhered to the side surface of the folded edge 12 through the weak adhesive layer 51. Since the protective film 5 abuts against the upper surface and the side surface of the folded edge 12 and is fixedly adhered to the side surface of the folded edge 12 through the weak adhesive layer 51, that is, the outer shape of the protective film 5 extends a little larger than that of the lower iron frame 1, and the protective film 5 exceeding the outer shape of the lower iron frame 1 is bent to the side of the lower iron frame 1. The surface of the protective film 5 is coated with a weak adhesive layer 51, and the weak adhesive layer 51 is fixed to the side of the lower iron frame 1, so that the protective film 5 is better fixed, preventing foreign objects from entering the inner film material of the backlight module due to vibration during transportation or handling, and preventing poor phenomena such as white clusters and uneven display when the backlight module is assembled with the liquid crystal display screen and lit for display.
[0031] Please refer to Figure 2 , Further, a half-tangent line 52 is arranged on the protective film 5 at the outer edge of the folded edge 12 to facilitate the bending of the protective film 5 and improve the bending efficiency.
[0032] Further, the protective film 5 is a high-transparency protective film 5, and the transmittance of the protective film 5 is 90%-99% to avoid the protective film 5 affecting the display effect.
[0033] Please refer to Figure 3 , As a further optimized solution of Embodiment 1, in this embodiment, at least one glue column 31 is arranged on the upper surface of the light guide plate 3. Preferably, there are four in this embodiment, and they are evenly distributed at the four corners of the light guide plate 3. The optical film group 4 is provided with positioning holes corresponding to the glue columns 31, and the optical film group 4 is sleeved on the glue columns 31. The positioning holes on the optical film group 4 can be positioned and fixed through the glue columns 31, and it does not need to be positioned by an auxiliary jig. The assembly process is simple, the assembly accuracy is high, and the production cost of the backlight module can be reduced.
[0034] When a relatively large number of molds are manufactured, the mold at the glue column 31 will have a certain amount of wear. This wear will cause a fillet to form between the subsequently produced light guide plate 3 and the glue column 31. When the fillet exists, the optical film group 4 will interfere with the fillet, resulting in the inability to install the optical film group 4. Therefore, preferably, a ring groove 32 surrounding the glue column 31 is provided at the connection between the upper surface of the light guide plate 3 and the glue column 31. When the mold wears, the wear will only occur at the ring groove 32, thereby avoiding the generation of a fillet at the edge angle of the glue column 31 due to mold wear and interfering with other components, affecting the assembly accuracy, and thus improving the yield rate and assembly efficiency.
[0035] Furthermore, the cross-sectional shape of the ring groove 32 is square, arc-shaped or triangular, but not limited thereto. The square, arc-shaped and triangular structures are simple and easy to manufacture; the assembly accuracy will not be affected after the mold wears.
[0036] Furthermore, the glue column 31 and the light guide plate 3 are integrally formed to reduce the installation steps, lower the installation cost, and improve the competitiveness of the product.
[0037] Furthermore, a guiding portion 33 with a diameter gradually increasing from top to bottom is provided at the top of the glue column 31, so that the optical film group 4 can be more smoothly sleeved in.
[0038] Furthermore, the guiding portion 33 is a chamfer or a fillet.
[0039] In the present utility model, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation" and the like shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0040] Obviously, the embodiments described above are only a part of the embodiments of the present application, rather than all of them. The preferred embodiments of the present application are shown in the drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or equivalently replace some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present application in other related technical fields is similarly within the scope of the patent protection of the present application.
Claims
1. A backlight module for preventing foreign matter from intruding, characterized in that: It includes: A lower iron frame, comprising a bottom plate and a folded edge formed by bending the edge of the bottom plate upward; A reflective sheet, which is arranged above the bottom plate; A light guide plate, which is arranged above the reflective sheet; An optical film group, which is arranged above the light guide plate; A protective film covers the optical film group, the protective film abuts against the upper surface and side surface of the folded edge, and a weak adhesive layer is provided on the inner surface of the protective film located on the side surface of the folded edge. The protective film is adhered and fixed to the side surface of the folded edge through the weak adhesive layer.
2. The backlight module for preventing foreign matter from intruding according to claim 1, characterized in that: A half-cut line is arranged on the protective film at the outer edge of the folded edge.
3. The backlight module for preventing foreign matter from intrusion according to claim 1, characterized in that: The protective film is a high-transmittance protective film.
4. The backlight module for preventing foreign matter from intrusion according to claim 1, characterized in that: The transmittance of the protective film is 90%-99%.
5. The backlight module for preventing foreign matter from intrusion according to claim 1, characterized in that: At least one glue column is disposed on the upper surface of the light guide plate, and a positioning hole corresponding to the glue column is opened in the optical film assembly, and the optical film assembly is sleeved on the glue column.
6. The backlight module for preventing foreign matter from intruding according to claim 5, characterized in that: An annular groove surrounding the glue column is provided on the upper surface of the light guide plate at the connection between the light guide plate and the glue column.
7. The backlight module for preventing foreign matter from intruding according to claim 6, characterized in that: The cross-sectional shape of the annular groove is square, arc or triangle.
8. The backlight module for preventing foreign matter from intruding according to claim 5, characterized in that: The glue column and the light guide plate are integrally formed.
9. The backlight module for preventing foreign matter from intruding according to claim 5, characterized in that: A guide portion with a diameter increasing from top to bottom is arranged at the top of the rubber column.
10. The backlight module for preventing foreign matter from intruding according to claim 9, characterized in that: The guide portion is chamfered at a right angle or a rounded angle.