Vehicle-mounted backlight module capable of improving heat dissipation capability and preventing sound
By designing the close contact between the lamp groove on the light-inlet side of the light guide plate and the FPC in the vehicle-mounted backlight module, combined with the use of thermal tape, the problems of excessive temperature and shaking of the light guide plate are solved, and the heat dissipation ability and stability of the module are improved , thereby enhancing its competitiveness.
Patent Information
- Application Number
- CN202421154137.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-24
AI Technical Summary
The vehicle-mounted backlight module is affected by the excessive temperature caused by insufficient attachment of LED lights to the iron frame and the shaking caused by insufficient light guide plates.
A vehicle-mounted backlight module including a lower frame, reflector, FPC and light guide plate was designed. A light groove was opened on the light inlet side of the light guide plate, and the LED light was embedded in the light groove. The light guide plate was in close contact with the FPC, and the FPC was fixed by thermal tape. On the side walls, enhance heat dissipation ability and prevent light guide plate from shaking.
It effectively improves the heat dissipation ability of the vehicle backlight module, prevents the light guide plate from shaking, and enhances its competitiveness.
Smart Images
Figure CN222354246U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of liquid crystal display, and more specifically to a vehicle-mounted backlight module with improved heat dissipation capability and anti-noise. Background Art
[0002] Common problems with vehicle-mounted backlight modules include high backlight module temperature and abnormal backlight noise. High backlight module temperature is generally caused by the LED lamp on the backlight not being attached closely enough to the iron frame, which results in the heat of the LED lamp not being able to be dissipated in time, and the heat gradually accumulates and causes the temperature to be too high; abnormal backlight noise is generally caused by the light guide plate of the backlight module not being firm enough and shaking. These two situations are chronic problems of vehicle-mounted backlight modules, which lead to insufficient competitiveness of vehicle-mounted backlight modules. Utility Model Content
[0003] The technical problem to be solved by the utility model is how to improve the heat dissipation capacity of the vehicle-mounted backlight module and prevent the light guide plate from shaking, so as to improve the competitiveness of the vehicle-mounted 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 vehicle-mounted backlight module with improved heat dissipation capability and anti-noise, which includes a lower frame, a reflective sheet, an FPC, a light guide plate and LED lamps, the lower frame includes a bottom plate and side walls extending upward from the edge of the bottom plate; the reflective sheet is fixed to the upper surface of the bottom plate; the FPC is fixed to the side wall; the light guide plate is fixed above the reflective sheet, a lamp groove is provided on the light incident side of the light guide plate, and the light incident side of the light guide plate abuts against the FPC; the LED lamp is fixed on the side of the FPC facing the light guide plate and embedded in the lamp groove, and the number of the LED lamps is equal to the number of the lamp grooves.
[0006] As a preferred embodiment of the vehicle-mounted backlight module with improved heat dissipation capability and anti-noise provided by the utility model, a thermal conductive tape is provided on the side of the FPC facing the side wall, and the FPC is fixed to the side wall by bonding with the thermal conductive tape.
[0007] As a preferred implementation of the vehicle-mounted backlight module with improved heat dissipation capability and noise prevention provided by the utility model, there are eight LED lamps, and the eight LED lamps are arranged on the FPC in sequence.
[0008] As a preferred implementation of the vehicle-mounted backlight module with improved heat dissipation capability and noise prevention provided by the utility model, the spacing between the single-side dimension of the outer shape of the lamp trough and the single-side dimension of the outer shape of the LED lamp is 0.1mm-1mm.
[0009] As a preferred implementation of the vehicle-mounted backlight module with improved heat dissipation capability and anti-noise provided by the utility model, a double-sided adhesive is arranged between the light guide plate and the FPC.
[0010] As a preferred embodiment of the vehicle-mounted backlight module with improved heat dissipation capability and anti-noise 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 thermally conductive glue, and the other end of the FPC passes through the opening of the glue frame and extends outward.
[0011] As a preferred implementation of the vehicle-mounted backlight module with improved heat dissipation capability and noise prevention provided by the utility model, slopes are provided at the notches of the bottom plate and the side walls.
[0012] As a preferred implementation of the vehicle-mounted backlight module with improved heat dissipation capability and noise prevention 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.
[0013] As a preferred implementation of the vehicle-mounted backlight module with improved heat dissipation capability and noise prevention provided by the utility model, serrated grooves are provided on the sides of the notches of the bottom plate and the side walls.
[0014] As a preferred implementation of the vehicle-mounted backlight module with improved heat dissipation capability and noise prevention provided by the utility model, the edge of the rubber frame is provided with a chamfer.
[0015] The utility model has the following beneficial effects:
[0016] Since a lamp trough is provided on the light incident side of the light guide plate, the LED lamp is embedded in the lamp trough, and the light incident side of the light guide plate abuts against the FPC, the light guide plate and the FPC can be in close contact, so that the FPC and the side wall can also be in close contact, thereby avoiding abnormal noise from the light guide plate, and the heat emitted by the LED lamp can be directly transferred to the lower frame through the FPC, thereby avoiding the accumulation of heat emitted by the LED lamp. It can improve the heat dissipation capacity of the vehicle-mounted backlight module while preventing the light guide plate from shaking, thereby improving the competitiveness of the vehicle-mounted backlight module. 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 provides a structural schematic diagram of a vehicle-mounted backlight module with improved heat dissipation capability and anti-noise.
[0019] Figure 2 for Figure 1 Cross-sectional view at AA in .
[0020] Figure 3 for Figure 1 Schematic diagram of the structure of the light guide plate.
[0021] Figure 4 This is a schematic diagram of the structure of Example 2.
[0022] Description of Figure Numbers:
[0023] Lower frame 1; reflector 2; FPC 3; light guide plate 4; LED lamp 5; bottom plate 11; side wall 12; lamp trough 41;
[0024] Glue frame 13; opening 14. DETAILED DESCRIPTION
[0025] 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.
[0026] 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.
[0027] 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.
[0028] The utility model provides a vehicle-mounted backlight module with improved heat dissipation capacity and anti-noise, which includes a lower frame, a reflective sheet, an FPC, a light guide plate and an LED lamp, wherein the lower frame includes a bottom plate and side walls extending upward from the edge of the bottom plate; the reflective sheet is fixed to the upper surface of the bottom plate; the FPC is fixed to the side wall; the light guide plate is fixed above the reflective sheet, a light groove is provided on the light incident side of the light guide plate, and the light incident side of the light guide plate abuts against the FPC; the LED lamp is fixed on the side of the FPC facing the light guide plate and embedded in the lamp groove, and the number of the LED lamps is equal to the number of the lamp grooves.
[0029] Since a lamp trough is provided on the light incident side of the light guide plate, the LED lamp is embedded in the lamp trough, and the light incident side of the light guide plate abuts against the FPC, the light guide plate and the FPC can be in close contact, so that the FPC and the side wall can also be in close contact, thereby avoiding abnormal noise from the light guide plate, and the heat emitted by the LED lamp can be directly transferred to the lower frame through the FPC, thereby avoiding the accumulation of heat emitted by the LED lamp. It can improve the heat dissipation capacity of the vehicle-mounted backlight module while preventing the light guide plate from shaking, thereby improving the competitiveness of the vehicle-mounted backlight module.
[0030] 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.
[0031] See also Figures 1 to 3, a vehicle-mounted backlight module with improved heat dissipation capacity and anti-noise provided by the utility model, which includes a lower frame 1, a reflective sheet 2, an FPC3, a light guide plate 4 and an LED lamp 5. The lower frame 1 includes a bottom plate 11 and a side wall 12, and the side wall 12 is formed by extending upward from the edge of the bottom plate 11; the reflective sheet 2 is fixed to the upper surface of the bottom plate 11; the FPC3 is fixed to the side wall 12; the light guide plate 4 is fixed above the reflective sheet 2, and a lamp groove 41 is opened on the light incident side of the light guide plate 4, and the light incident side of the light guide plate 4 is in contact with the FPC3; the LED lamp 5 is fixed on the side of the FPC3 facing the light guide plate 4 and embedded in the lamp groove 41, and the number of the LED lamps 5 is equal to the number of the lamp grooves 41. Since a lamp groove 41 is provided on the light incident side of the light guide plate 4, the LED lamp 5 is embedded in the lamp groove 41, and the light incident side of the light guide plate 4 abuts against the FPC3, the light guide plate 4 can be in close contact with the FPC3, so that the FPC3 can also be in close contact with the side wall 12, thereby avoiding abnormal noise from the light guide plate 4, and the heat emitted by the LED lamp 5 can be directly transferred to the lower frame 1 via the FPC3, thereby avoiding accumulation of heat emitted by the LED lamp 5. It can improve the heat dissipation capacity of the vehicle-mounted backlight module and prevent the light guide plate 4 from shaking, thereby improving the competitiveness of the vehicle-mounted backlight module.
[0032] Furthermore, a thermal conductive tape is provided on the side of FPC3 facing the side wall 12, and FPC3 is fixed to the side wall 12 by the thermal conductive tape, so that FPC3 can be well fixed to the side wall 12 while increasing the contact area between FPC3 and the side wall 12, thereby improving the heat dissipation capacity.
[0033] Furthermore, there are eight LED lamps 5 , and the eight LED lamps 5 are arranged on the FPC 3 in sequence.
[0034] Furthermore, the distance between the single side dimension of the lamp trough 41 and the single side dimension of the LED lamp 5 is 0.1 mm-1 mm.
[0035] Furthermore, a double-sided adhesive is provided between the light guide plate 4 and the FPC 3 to better fix the light guide plate 4 and the FPC 3 to avoid abnormal noise. More preferably, an interference fit is adopted between the light guide plate 4 and the FPC 3.
[0036] See also Figure 4As 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 13 is formed by injection molding around the outer edge of the notch. The glue frame 13 is integrally formed with the lower frame 1, and the glue frame 13 is not completely closed but has an opening 14; one end of the FPC3 is fixed to the inner side of the side wall 12 by means of thermal conductive adhesive, and the other end of the FPC3 passes through the opening 14 of the glue frame 13 and extends outward. Since the glue frame 13 is injection molded at the notch opening of the bottom plate 11 and the side wall 12, and the glue frame 13 also has an opening 14, the FPC3 can pass through the opening 14 to connect with the module, and the material of the glue frame 13 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.
[0037] Furthermore, slopes are provided at the gaps of the bottom plate 11 and the side wall 12 so that the glue rack 13 is stuck by the slopes after being formed, thereby preventing the glue rack 13 from falling off.
[0038] 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 13 will not fall off in all directions.
[0039] 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 rack 13 and the lower frame 1 and prevent the glue rack 13 from falling off.
[0040] Furthermore, the edge of the glue frame 13 is provided with a chamfer, which may be a right angle or a rounded angle, and both the right angle and the rounded angle can prevent the FPC 3 from being scratched.
[0041] 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.
[0042] 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 vehicle-mounted backlight module with improved heat dissipation capability and anti-noise, characterized in that: It includes: A lower frame, comprising a bottom plate and side walls extending upward from the edge of the bottom plate; A reflective sheet fixed to the upper surface of the bottom plate; FPC, which is fixed on the side wall; A light guide plate, which is fixed above the reflective sheet, a light slot is provided on the light incident side of the light guide plate, and the light incident side of the light guide plate abuts against the FPC; The LED lamp is fixed on the side of the FPC facing the light guide plate and embedded in the lamp groove. The number of the LED lamps is equal to the number of the lamp grooves.
2. The vehicle-mounted backlight module with improved heat dissipation capability and anti-noise according to claim 1, characterized in that: A heat-conducting tape is provided on one side of the FPC facing the side wall, and the FPC is fixed to the side wall by sticking the heat-conducting tape.
3. The vehicle-mounted backlight module with improved heat dissipation capability and anti-noise according to claim 1, characterized in that: There are eight LED lamps, and the eight LED lamps are arranged on the FPC in sequence.
4. The vehicle-mounted backlight module with improved heat dissipation capability and anti-noise according to claim 1, characterized in that: The distance between the single-side dimension of the lamp trough and the single-side dimension of the LED lamp is 0.1 mm-1 mm.
5. The vehicle-mounted backlight module with improved heat dissipation capability and anti-noise according to claim 1, characterized in that: A double-sided adhesive is provided between the light guide plate and the FPC.
6. The vehicle-mounted backlight module with improved heat dissipation capability and anti-noise 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.
7. The vehicle-mounted backlight module with improved heat dissipation capability and anti-noise according to claim 6, characterized in that: The notches of the bottom plate and the side walls are provided with slopes.
8. The vehicle-mounted backlight module with improved heat dissipation capability and anti-noise according to claim 7, 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.
9. The vehicle-mounted backlight module with improved heat dissipation capability and anti-noise according to claim 6, characterized in that: The sides of the notches of the bottom plate and the side walls are provided with sawtooth grooves.
10. The vehicle-mounted backlight module with improved heat dissipation capability and anti-noise according to claim 6, characterized in that: The edge of the glue rack is provided with a chamfer.