Backlight with built-in main FPC
By building the display main FPC into the backlight module, the display main FPC is easily damaged when exposed and has high production costs, and the effect of protecting the FPC, reducing costs and improving production efficiency is achieved.
Patent Information
- Application Number
- CN202420649888.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-03-29
AI Technical Summary
The current display main FPC is prone to scratches and collisions when exposed, and also requires the display main FPC and the backlit FPC, resulting in an increase in production costs and is not conducive to production efficiency.
The main FPC of the display is designed to be directly built into the backlight module. The device area of the FPC is opened on the back of the glued iron frame. The main FPC of the display is exposed from the bottom of the backlight module and is directly connected to the TFT LCD main screen. The backlight FPC is cancelled, and the backlight LED light is directly soldered to the main FPC of the display.
It protects the main FPC from damage, reduces material costs, and improves production efficiency.
Smart Images
Figure CN222784732U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of display, in particular to a backlight with a built-in main FPC. Background Art
[0002] The backlight module is one of the key components of the liquid crystal display panel. Its function is to supply sufficient brightness and evenly distributed light source. The backlight LED lamp is powered by the backlight FPC to illuminate, so that it can display images normally. In a conventional display module, it includes a main display FPC for powering the display module. The LCD liquid crystal display module is conductive through the main display FPC. The backlight FPC can be powered by being electrically connected to the main display FPC. However, the current main display FPC is easily scratched and collided when exposed to the outside. At the same time, the display module requires both the main display FPC and the backlight FPC, which will increase the production cost and is not conducive to production efficiency.
[0003] For example, the Chinese utility model patent (CN217739879U) discloses a backlight module, a touch module and an electronic device, including a backlight assembly, the backlight assembly including an anti-reflection film, a light source, and an iron frame; a flexible circuit board, the flexible circuit board including a first area, a bending area and a second area, the first area of the flexible circuit board being arranged on the mounting surface of the light source; and a protective paper, the protective paper covering the first area and the bending area of the flexible circuit board. The utility model extends the PET protective paper added to the bottom of the backlight front shading glue to the entire bending area of the backlight FPC to prevent breakage, and can also protect the surface of the single-layer area of the backlight FPC to avoid scratches.
[0004] However, when the present inventors implemented this device, they found the following defects: the main FPC of the current display screen is easily scratched and collided when exposed to the outside. At the same time, the display module requires both the main FPC of the display screen and the backlight FPC, which increases the production cost and is not conducive to production efficiency. Utility Model Content
[0005] Based on this, it is necessary to provide a backlight with a built-in main FPC to address the above technical problems. The main FPC of the display screen is directly designed and attached to the backlight as a built-in FPC, wherein the component area of the FPC (including the connector area) is opened on the back of the glue iron frame of the backlight module, wherein the main FPC of the display screen is exposed from the bottom of the backlight module and is directly bound and connected to the TFT LCD main screen. The main FPC of the display screen of this design is directly used as a built-in FPC, which can protect the main FPC from damage. At the same time, the backlight FPC is eliminated, and the backlight LED is directly welded to the main FPC of the display screen, which reduces material costs and is beneficial to production efficiency.
[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0007] A backlight with built-in main FPC.
[0008] The backlight of the built-in main FPC specifically includes:
[0009] A backlight module, the backlight module includes an upper light-enhancing film, a lower light-enhancing film, a diffusion film, a light guide plate, a reflective film, a backlight LED lamp, a shading film and a plastic iron frame, the backlight module also includes a display screen main FPC for binding and connecting with the TFT liquid crystal main screen, the plastic iron frame is provided with an opening for the display screen main FPC to pass through, and the backlight LED lamp is arranged on the display screen main FPC.
[0010] As a preferred implementation of the backlight with built-in main FPC provided by the utility model, there are two backlight LED lamps, both of which are electrically connected to the main FPC of the display screen.
[0011] As a preferred implementation of the backlight with a built-in main FPC provided by the utility model, in a top view, the reflective film is attached to the main FPC of the display screen.
[0012] As a preferred implementation of the backlight with built-in main FPC provided by the utility model, the thickness of the light-shielding film is 0.1-0.2 um.
[0013] As a preferred implementation of the backlight with built-in main FPC provided by the utility model, the light-shielding film is arranged to cover the rubber iron frame and the upper brightness enhancement film.
[0014] As a preferred implementation of the backlight with built-in main FPC provided by the utility model, the light guide plate and the backlight LED lamp are on the same plane.
[0015] As a preferred implementation of the backlight with built-in main FPC provided by the utility model, the reflective film is made of any one of gold, silver, platinum, aluminum and copper.
[0016] As a preferred implementation of the backlight with built-in main FPC provided by the utility model, the distance between one end of the light-shielding film close to the plastic iron frame and the side surface of the plastic iron frame is 0.05um~0.1um.
[0017] As a preferred implementation of the backlight with built-in main FPC provided by the utility model, the upper brightness enhancement film and the lower brightness enhancement film have the same size.
[0018] As a preferred implementation of the backlight with built-in main FPC provided by the utility model, the thickness of the light guide plate is 0.7um~0.8um.
[0019] Compared with the prior art, the utility model has the following beneficial effects:
[0020] The utility model provides a backlight with a built-in main FPC, in which the display screen main FPC is directly designed and attached to the backlight as a built-in FPC, wherein the component area of the FPC (including the connector area) is opened at the back of the plastic iron frame of the backlight module, wherein the display screen main FPC is exposed from the bottom of the backlight module and is directly bound and connected to the TFT liquid crystal main screen. The display screen main FPC of this design is directly used as a built-in FPC, which can protect the main FPC from damage, and at the same time cancels the backlight FPC, and the backlight LED lamp is directly welded on the display screen main FPC, thereby reducing material costs and facilitating production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the scheme in the utility model, 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0022] Figure 1 This is a schematic diagram of the structure of the backlight with built-in main FPC provided by the utility model;
[0023] Figure 2 Another structural schematic diagram of a backlight with a built-in main FPC provided by the utility model;
[0024] The markings in the figure are as follows:
[0025] Backlight module 10 , upper brightness enhancement film 101 , lower brightness enhancement film 102 , diffusion film 103 , light guide plate 104 , reflection film 105 , backlight LED lamp 106 , light shielding film 107 , plastic iron frame 108 , FPC 109 , opening 110 . DETAILED DESCRIPTION
[0026] 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.
[0027] As mentioned in the background art, the main FPC of the current display screen is easily scratched and collided when exposed to the outside. At the same time, the display module requires both the main FPC of the display screen and the backlight FPC, which increases the production cost and is not conducive to production efficiency.
[0028] In order to solve this technical problem, the utility model provides a backlight with a built-in main FPC.
[0029] Specifically, please refer to Figure 1 , the backlight of the built-in main FPC specifically includes:
[0030] The backlight module 10 includes an upper brightness enhancement film 101, a lower brightness enhancement film 102, a diffusion film 103, a light guide plate 104, a reflection film 105, a backlight LED lamp 106, a shading film 107 and a plastic iron frame 108. The backlight module 10 also includes a display screen main FPC 109 for binding and connecting with the TFT liquid crystal main screen. The plastic iron frame 108 is provided with an opening 110 for the display screen main FPC 109 to pass through. The backlight LED lamp 106 is arranged on the display screen main FPC 109.
[0031] The utility model provides a backlight with a built-in main FPC, and the display screen main FPC 109 is directly designed and attached to the backlight as a built-in FPC 109, wherein the component area (including the connector area) of the FPC 109 is opened 110 on the back of the plastic iron frame 108 of the backlight module 10, wherein the display screen main FPC 109 is exposed from the bottom of the backlight module 10, and is directly bound and connected to the TFT liquid crystal main screen. The display screen main FPC 109 of the present design is directly used as a built-in FPC 109, which can protect the main FPC 109 from damage, and at the same time the backlight FPC 109 is eliminated, and the backlight LED lamp 106 is directly welded on the display screen main FPC 109, thereby reducing material costs and facilitating production efficiency.
[0032] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.
[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.
[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0035] Example 1
[0036] Please refer to Figure 1A backlight with a built-in main FPC includes a backlight module 10. The backlight module 10 includes an upper light-enhancing film 101, a lower light-enhancing film 102, a diffusion film 103, a light guide plate 104, a reflection film 105, a backlight LED lamp 106, a light-shielding film 107 and a glue iron frame 108. The backlight module 10 also includes a display screen main FPC 109 for binding and connecting with a TFT liquid crystal main screen. The glue iron frame 108 is provided with an opening 110 for the display screen main FPC 109 to pass through. The backlight LED lamp 106 is arranged on the display screen main FPC 109.
[0037] Through the above structural design, the main FPC109 of the display screen is directly designed to be attached to the backlight as a built-in FPC109, wherein the component area (including the connector area) of the FPC109 is opened 110 on the back of the plastic iron frame 108 of the backlight module 10, wherein the main FPC109 of the display screen is exposed from the bottom of the backlight module 10, and is directly bound and connected to the TFT liquid crystal main screen. The main FPC109 of the display screen of this design is directly used as a built-in FPC109, which can protect the main FPC109 from damage, and at the same time cancels the backlight FPC109, and the backlight LED lamp 106 is directly welded on the main FPC109 of the display screen, which reduces material costs and is beneficial to production efficiency.
[0038] Specifically, there are two or more backlight LED lamps 106 , which are all electrically connected to the display screen main FPC 109 .
[0039] Through the above structural design, the backlight LED lamp 106 uses a light-emitting diode as the backlight source of the liquid crystal display. Compared with the traditional cold cathode tube backlight source, the backlight LED lamp 106 has the characteristics of low power consumption, low heat generation, high brightness, and long life. The number of backlight LED lamps 106 is two or more, and they are all electrically connected to the main FPC 109 of the display screen.
[0040] Specifically, the reflective film 105 is attached to the display screen main FPC 109 .
[0041] Specifically, the light shielding film 107 is disposed on the adhesive iron frame 108 and the upper brightness enhancement film 101 .
[0042] Through the above structural design, the reflective film 105 is a part of the material constituting the backlight module 10, and is located at the bottom of the backlight module 10, below the light guide plate 104. Its function is to reflect the light that leaks through the light guide plate 104 to the bottom back to the panel side, thereby reducing light loss and increasing light brightness.
[0043] Specifically, the thickness of the light shielding film 107 is 0.1-0.2 um.
[0044] Through the above structural design, in this embodiment, the thickness of the light shielding film 107 is 0.1 um, and it can also be of different thicknesses under different requirements.
[0045] Specifically, the light guide plate 104 and the backlight LED lamp 106 are on the same plane.
[0046] Through the above structural design, the function of the light guide plate 104 is to change the light incident from the side parallel direction of the backlight LED lamp 106 into a non-planar direction, so that the parallel light will become scattered light when it shines on it, and move in the upward and downward directions. The downward light is reflected back by the reflective sheet.
[0047] Example 2
[0048] The backlight of the built-in main FPC provided in Example 1 is further optimized, specifically, as follows Figure 1 As shown, the reflective film 105 is made of any one of gold, silver, platinum, aluminum and copper.
[0049] Through the above structural design, the reflective film 105 is a part of the material constituting the backlight module 10, and is located at the bottom of the backlight module 10, below the light guide plate 104. Its function is to reflect the light that leaks through the light guide plate 104 to the bottom back and return it to the panel side, thereby reducing light loss and increasing light brightness. The main FPC 109 of the display screen is directly designed to be attached to the backlight as a built-in FPC 109, wherein the component area (including the connector area) of the FPC 109 is opened 110 on the back of the plastic iron frame 108 of the backlight module 10, wherein the main FPC 109 of the display screen is exposed from the bottom of the backlight module 10, and is directly bound and connected to the TFT liquid crystal main screen. The main FPC 109 of the display screen of this design is directly used as a built-in FPC 109, which can protect the main FPC 109 from damage, and at the same time cancels the backlight FPC 109, and the backlight LED lamp 106 is directly welded on the main FPC 109 of the display screen, which reduces material costs and is beneficial to production efficiency.
[0050] Furthermore, if Figure 2 As shown, the reflective film 105 can be directly formed on the main FPC 109 of the display screen, such as coating a designated area to form a reflective area. This not only reduces the assembly steps of the reflective film, but also reduces the thickness of the reflective film, further reducing the overall thickness of the backlight.
[0051] Furthermore, a reflective film 105 is attached to the top of the backlight LED lamp 106, so that the light refracted or reflected to the top of the backlight LED lamp 106 is further reflected back through the reflective film 105, thereby enhancing the utilization of light.
[0052] Example 3
[0053] The backlight of the built-in main FPC provided in embodiment 1 or 2 is further optimized, such as Figure 1 As shown, the distance between one end of the light shielding film 107 close to the plastic iron frame 108 and the side surface of the plastic iron frame 108 is 0.05um-0.1um.
[0054] Through the above structural design, the shading film 107 maintains a certain distance from the iron frame 108 to prevent structural interference. In the present embodiment, the distance between the end of the shading film 107 close to the iron frame 108 and the side of the iron frame 108 is 0.05um. Under different requirements, the distance size can also be different. The main FPC 109 of the display screen is directly designed to be attached to the backlight as a built-in FPC 109, wherein the component area (including the connector area) of the FPC 109 is opened 110 on the back of the iron frame 108 of the backlight module 10, wherein the main FPC 109 of the display screen is exposed from the bottom of the backlight module 10, and is directly bound and connected to the TFT liquid crystal main screen. The main FPC 109 of the display screen of the present design is directly used as a built-in FPC 109, which can protect the main FPC 109 from damage, and at the same time cancels the backlight FPC 109, and the backlight LED lamp 106 is directly welded to the main FPC 109 of the display screen, thereby reducing material costs and facilitating production efficiency.
[0055] Specifically, the upper brightness enhancement film 101 and the lower brightness enhancement film 102 have the same size.
[0056] Through the above structural design, the main FPC109 of the display screen is directly designed to be attached to the backlight as a built-in FPC109, wherein the component area (including the connector area) of the FPC109 is opened 110 on the back of the plastic iron frame 108 of the backlight module 10, wherein the main FPC109 of the display screen is exposed from the bottom of the backlight module 10, and is directly bound and connected to the TFT liquid crystal main screen. The main FPC109 of the display screen of this design is directly used as a built-in FPC109, which can protect the main FPC109 from damage, and at the same time cancels the backlight FPC109, and the backlight LED lamp 106 is directly welded on the main FPC109 of the display screen, which reduces material costs and is beneficial to production efficiency.
[0057] Specifically, the thickness of the light guide plate 104 is 0.7 um to 0.8 um.
[0058] Through the above structural design, in this embodiment, the thickness of the light guide plate 104 is 0.7um, and under different requirements, it can also be a different distance size. The main FPC109 of the display screen is directly designed to be attached to the backlight as a built-in FPC109, wherein the component area (including the connector area) of the FPC109 is opened 110 on the back of the plastic iron frame 108 of the backlight module 10, wherein the main FPC109 of the display screen is exposed from the bottom of the backlight module 10, and is directly bound and connected to the TFT liquid crystal main screen. The main FPC109 of the display screen designed is directly used as a built-in FPC109, which can protect the main FPC109 from damage, and at the same time cancels the backlight FPC109, and the backlight LED lamp 106 is directly welded on the main FPC109 of the display screen, which reduces material costs and is beneficial to production efficiency.
[0059] The use process of the backlight with built-in main FPC provided by the utility model is as follows:
[0060] The main FPC109 of the display screen is directly designed and attached to the backlight as a built-in FPC109, wherein the component area (including the connector area) of the FPC109 is opened 110 on the back of the plastic iron frame 108 of the backlight module 10, wherein the main FPC109 of the display screen is exposed from the bottom of the backlight module 10, and is directly bound and connected to the TFT liquid crystal main screen. The main FPC109 of the display screen of this design is directly used as a built-in FPC109, which can protect the main FPC109 from damage, and at the same time cancels the backlight FPC109, and the backlight LED lamp 106 is directly welded on the main FPC109 of the display screen, which reduces material costs and is beneficial to production efficiency.
[0061] 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.
[0062] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model 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 utility model more thorough and comprehensive. Although the utility model 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 replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.
Claims
1. A backlight with a built-in main FPC, characterized in that: The invention comprises a backlight module (10), wherein the backlight module (10) comprises an upper brightness enhancement film (101), a lower brightness enhancement film (102), a diffusion film (103), a light guide plate (104), a reflection film (105), a backlight LED lamp (106), a light shielding film (107) and a plastic iron frame (108); the backlight module (10) further comprises a display screen main FPC (109) for binding and connecting with a TFT liquid crystal main screen; the plastic iron frame (108) is provided with an opening (110) for the display screen main FPC (109) to pass through; and the backlight LED lamp (106) is arranged on the display screen main FPC (109).
2. The backlight with built-in main FPC according to claim 1, characterized in that: The number of the backlight LED lamps (106) is two or more, and they are all electrically connected to the display screen main FPC (109).
3. The backlight with built-in main FPC according to claim 2, characterized in that: The reflective film (105) is attached to the display screen main FPC (109).
4. The backlight with built-in main FPC according to claim 1, characterized in that: The thickness of the light-shielding film (107) is 0.1-0.2 um.
5. The backlight with built-in main FPC according to claim 4, characterized in that: The light-shielding film (107) is arranged to cover the rubber-iron frame (108) and the upper brightness enhancement film (101).
6. The backlight with built-in main FPC according to claim 5, characterized in that: The light guide plate (104) and the backlight LED lamp (106) are located on the same plane.
7. The backlight with built-in main FPC according to claim 6, characterized in that: The reflective film (105) is made of any one of gold, silver, platinum, aluminum and copper.
8. The backlight with built-in main FPC according to claim 1, characterized in that: The distance between one end of the light shielding film (107) close to the plastic iron frame (108) and the side surface of the plastic iron frame (108) is 0.05um-0.1um.
9. The backlight with built-in main FPC according to claim 1, characterized in that: The upper brightness enhancement film (101) and the lower brightness enhancement film (102) have the same size.
10. The backlight with built-in main FPC according to claim 1, characterized in that: The thickness of the light guide plate (104) is 0.7um-0.8um.
Citation Information
Patent Citations
Backlight module, touch module and electronic equipment
CN217739879U