Backlight module capable of avoiding dark spots
By setting the light guide network on the lower frame of the backlight module and setting reflex sheets or white paint on the inner surface, the problem of dark spots during the molding process of the light guide board improves the consistency and product competitiveness of the light guide effect.
Patent Information
- Application Number
- CN202421100211.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-20
AI Technical Summary
Existing backlight modules are prone to dark spots or dark spots during the forming process of light guide plates, which affects the consistency of light guide effects, increases the defect rate and increases production costs.
Design a backlight module, where the light guide network is set on the bottom plate of the lower frame instead of the light guide plate, and a reflex sheet or white paint is set on the inner surface of the lower frame to avoid the light guide plate. No dark spots appear.
By designing the light guide outlet on the lower frame, the dark spots or dark dot problems of the light guide board are avoided in the formation process, the consistency of the light guide effect is improved, the adverse rate and production cost of the backlight module are reduced, Competitiveness.
Smart Images
Figure CN222420751U_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 avoiding dark spots. Background Art
[0002] The design of an ordinary backlight module is generally to make the light-guiding points of the backlight module on a transparent light-guiding plate. However, since the light-guiding plate is made of transparent material, it is easy to have dark spots and other defects during the molding process, which affects the normal light-guiding function of the light-guiding plate and the consistency of the effect, increases the defective rate of the backlight module, and further increases the production cost of the backlight module, reducing the product competitiveness of the backlight module. Utility Model Content
[0003] The technical problem to be solved by the utility model is how to avoid defects such as dark spots or dark dots on the light guide plate during the molding process, so that the light guide plate can play a normal light guiding role, improve the consistency of the light guiding effect, reduce the defective rate of the backlight module, and then reduce the production cost of the backlight module, and improve the product competitiveness of the backlight module.
[0004] The technical problem to be solved by the utility model is achieved through the following technical solutions:
[0005] In order to solve the above technical problems, the utility model provides a backlight module for avoiding dark spots, which includes a lower frame, a light guide plate, an FPC and an LED lamp, the lower frame includes a bottom plate and a side wall extending upward from the edge of the bottom plate, and the upper surface of the bottom plate is provided with light guide points; the light guide plate is arranged above the bottom plate; the FPC is arranged on the bottom plate; the LED lamp is fixed on the FPC and arranged on the light incident side of the light guide plate.
[0006] As a preferred implementation of the backlight module for avoiding dark spots provided by the utility model, a reflective sheet is provided on the inner surface of the lower frame, and the reflective sheet avoids the light guide grid points.
[0007] As a preferred implementation of the backlight module for avoiding dark spots provided by the utility model, the color of the inner surface of the lower frame is white.
[0008] As a preferred implementation of the backlight module for avoiding dark spots provided by the utility model, the inner surface of the lower frame is painted with white paint, and the white paint avoids the light guide dots.
[0009] As a preferred implementation of the backlight module for avoiding dark spots provided by the utility model, the light guide plate is an acrylic plate.
[0010] As a preferred implementation of the backlight module for avoiding dark spots provided by the utility model, the lower frame is a rubber frame.
[0011] As a preferred embodiment of the backlight module for avoiding dark spots provided by the utility model, a notch is provided at the connection between the edge of the bottom plate and the side wall, a glue frame is formed by injection molding around the outer edge of the notch, the glue frame is integrally formed with the lower frame, and the glue frame is not completely closed but has an opening; one end of the FPC is fixed to the inner side of the bottom plate by bonding with thermal conductive glue, and the other end of the FPC passes through the opening of the glue frame and extends outward.
[0012] As a preferred implementation of the backlight module for avoiding dark spots provided by the utility model, slopes are arranged at the notches of the bottom plate and the side walls.
[0013] As a preferred implementation of the backlight module for avoiding dark spots provided by the utility model, the slope at the notch of the bottom plate and the slope at the notch of the side wall are in different directions.
[0014] As a preferred implementation of the backlight module for avoiding dark spots provided by the utility model, the sides of the notches of the bottom plate and the side walls are provided with serrated grooves.
[0015] The utility model has the following beneficial effects:
[0016] By designing the light guide points on the lower frame, it is possible to avoid dark spots or other defects in the light guide plate during the molding process, so that the light guide plate can play a normal light guide role, improve the consistency of the light guide effect, and reduce the defect rate of the backlight module; and the light guide plate can adopt a uniform thickness and be mass-produced, without the need for mold production, saving costs. In turn, the production cost of the backlight module is reduced and the product competitiveness of the backlight module is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0018] Figure 1 The utility model is a schematic structural diagram of a backlight module for avoiding dark spots.
[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the light guide plate.
[0020] Figure 3 A schematic structural diagram of another backlight module for avoiding dark spots provided by the utility model.
[0021] Description of Figure Numbers:
[0022] Lower frame 1; light guide plate 2; FPC 3; LED lamp 4; bottom plate 11; side wall 12; light guide point 13;
[0023] Glue holder 14; opening 15. DETAILED DESCRIPTION
[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0025] In the description of the present invention, 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", "clockwise", "counterclockwise", "axial", "radial", "circumferential" 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 invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0026] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0027] The utility model provides a backlight module for avoiding dark spots, which comprises a lower frame, a light guide plate, an FPC and an LED lamp, wherein the lower frame comprises a bottom plate and a side wall extending upward from the edge of the bottom plate, and the upper surface of the bottom plate is provided with light guide points; the light guide plate is arranged above the bottom plate; the FPC is arranged on the bottom plate; the LED lamp is fixed on the FPC and arranged on the light incident side of the light guide plate.
[0028] By designing the light guide points on the lower frame, it is possible to avoid dark spots or other defects in the light guide plate during the molding process, so that the light guide plate can play a normal light guide role, improve the consistency of the light guide effect, and reduce the defect rate of the backlight module; and the light guide plate can adopt a uniform thickness and be mass-produced, without the need for mold production, saving costs. In turn, the production cost of the backlight module is reduced and the product competitiveness of the backlight module is improved.
[0029] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention.
[0030] See also Figure 1 and Figure 2 , a backlight module for avoiding dark spots provided by the utility model comprises a lower frame 1, a light guide plate 2, an FPC 3 and an LED lamp 4, the lower frame 1 comprises a bottom plate 11 and a side wall 12, the side wall 12 is formed by extending upward from the edge of the bottom plate 11, and a light guide grid 13 is arranged on the upper surface of the bottom plate 11; the light guide plate 2 is arranged above the bottom plate 11; the FPC 3 is arranged on the bottom plate 11; the LED lamp 4 is fixed on the FPC 3 and arranged on the light incident side of the light guide plate 2. By designing the light guide grid 13 on the lower frame 1, it is possible to avoid the occurrence of dark spots or dark spots on the light guide plate 2 during the molding process, so that the light guide plate 2 can play a normal light guiding role, improve the consistency of the light guiding effect, and reduce the defective rate of the backlight module; and the light guide plate 2 can adopt a uniform thickness and be mass-produced, without the need for mold production, saving costs. In this way, the production and manufacturing cost of the backlight module is reduced, and the product competitiveness of the backlight module is improved.
[0031] Furthermore, a reflective sheet is provided on the inner surface of the lower frame 1 , that is, a reflective sheet is provided on the upper surface of the bottom plate 11 and the inner side surface of the side wall 12 , and the reflective sheet avoids the light guide points 13 to improve reflection efficiency and prevent light from being absorbed.
[0032] Furthermore, the color of the inner surface of the lower frame 1 is white. In the present embodiment, the inner surface of the lower frame 1 is painted with white paint, that is, the upper surface of the base plate 11 and the inner surface of the side wall 12 are painted with white paint, and the white paint avoids the light guiding points 13 to improve the reflection efficiency and avoid light being absorbed.
[0033] Furthermore, the light guide plate 2 can be injection molded, and in some industrial products with low requirements, a CNC-processed acrylic plate can be used, which can effectively reduce product costs.
[0034] Furthermore, the lower frame 1 is a plastic frame, and the light-guiding points 13 of the plastic frame are easier to form, which can effectively reduce product costs.
[0035] See also Figure 3 As a further optimization scheme of Example 1, in this embodiment, a notch is provided at the connection between the edge of the bottom plate 11 and the side wall 12, and a glue frame 14 is formed by injection molding around the outer edge of the notch. The glue frame 14 is integrally formed with the lower frame 1, and the glue frame 14 is not completely closed but has an opening 15; one end of the FPC3 is fixed to the inner side of the bottom plate 11 by means of thermal conductive adhesive, and the other end of the FPC3 passes through the opening 15 of the glue frame 14 and extends outward. Since the glue frame 14 is injection molded at the notch opening of the bottom plate 11 and the side wall 12, and the glue frame 14 also has an opening 15, the FPC3 can pass through the opening 15 to connect with the module, and the material of the glue frame 14 is relatively soft, which can effectively avoid scratching or piercing the PI covering film of the FPC3, and avoid the circuit of the FPC3 from contacting and conducting with the lower frame 1 to cause a short circuit, so that the backlight module can display normally. There is no need to attach a single-sided adhesive, and there is no need to worry about the problem of the single-sided adhesive being too thin or too thick.
[0036] Furthermore, slopes are provided at the gaps of the bottom plate 11 and the side wall 12 so that the glue rack 14 is stuck by the slopes after being formed, thereby preventing the glue rack 14 from falling off.
[0037] Furthermore, the slopes at the notch of the bottom plate 11 and the notch of the side wall 12 have different directions, and the directions of the slopes at different positions are staggered so that the glue rack 14 will not fall off in all directions.
[0038] Furthermore, serrated grooves are provided on the sides of the notches of the bottom plate 11 and the side wall 12 to further enhance the bonding force between the glue holder 14 and the lower frame 1 and prevent the glue holder 14 from falling off.
[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0040] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying 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 disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.
Claims
1. A backlight module for avoiding dark spots, characterized in that: It includes: A lower frame, comprising a bottom plate and side walls extending upward from the edge of the bottom plate, wherein the upper surface of the bottom plate is provided with light guide points; A light guide plate, which is arranged above the bottom plate; An FPC is disposed on the bottom plate; The LED lamp is fixed on the FPC and arranged on the light incident side of the light guide plate.
2. The backlight module for avoiding dark spots according to claim 1, characterized in that: A reflective sheet is disposed on the inner surface of the lower frame, and the reflective sheet avoids the light guide points.
3. The backlight module for avoiding dark spots according to claim 1, characterized in that: The color of the inner surface of the lower frame is white.
4. The backlight module for avoiding dark spots according to claim 3, characterized in that: The inner surface of the lower frame is painted with white paint, and the white paint avoids the light guide points.
5. The backlight module for avoiding dark spots according to claim 1, characterized in that: The light guide plate is an acrylic plate.
6. The backlight module for avoiding dark spots according to claim 1, characterized in that: The lower frame is a plastic frame.
7. The backlight module for avoiding dark spots according to claim 1, characterized in that: A notch is provided at the connection between the edge of the bottom plate and the side wall, and a glue frame is formed by injection molding around the outer edge of the notch. The glue frame is integrally formed with the lower frame, and the glue frame is not completely closed but has an opening. One end of the FPC is fixed to the inner side of the bottom plate by means of thermal conductive adhesive, and the other end of the FPC passes through the opening of the glue frame and extends outward.
8. The backlight module for avoiding dark spots according to claim 7, characterized in that: The notches of the bottom plate and the side walls are provided with slopes.
9. The backlight module for avoiding dark spots according to claim 8, characterized in that: The slope at the notch of the bottom plate and the slope at the notch of the side wall have different directions.
10. The backlight module for avoiding dark spots according to claim 7, characterized in that: The sides of the notches of the bottom plate and the side walls are provided with sawtooth grooves.