Backlight structure

Abstract

The utility model discloses a backlight structure which comprises an iron frame, a light guide module, an FPC (flexible printed circuit) and a protective sticker, and the light guide module is mounted in the iron frame; the right side of the iron frame is of a plane structure and is provided with an avoiding hole, and the FPC is located in the avoiding hole. The protection paste is arranged at the bottom of the iron frame, and one end of the protection paste is bent to the left side of the iron frame. According to the backlight structure provided by the utility model, the iron frame on the backlight back surface is designed to be in a flat state and is not provided with a convex structure, the avoiding hole is formed in the right side of the iron frame, and a double-sided adhesive tape between the FPC and the iron frame is canceled, so that the FPC is positioned in the avoiding hole; and meanwhile, the protective sticker is extended and bent to the right side of the iron frame and covers the whole FPC surface on the back surface and the iron frame surface close to the outline edge of the FPC, so that the FPC can be fixed, displacement or falling off can be prevented, the back surface of the iron frame is smooth, the production and manufacturing cost is reduced, the competitiveness of backlight products is improved, and the quality requirements of enterprises are better met.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display, in particular to a backlight structure. Background Art

[0002] With the improvement of living standards, liquid crystal displays are widely used in various electronic products. They are widely loved by consumers due to their advantages such as low price and clear effect. The display mode of liquid crystal displays is passive. Generally, liquid crystal displays have a backlight structure, and their display depends on the backlight structure light source.

[0003] like Figure 1 As shown, for the structure of the ultra-narrow bottom frame backlight, the backlight FPC113 is usually placed between the light guide plate 111 and the back iron frame 112. In this structure, the corresponding total thickness of the FPC113 position at the lower end of the backlight will be thicker than that at the upper end. The lower iron frame 112 avoids the FPC113 and presents a convex phenomenon. The iron frame 112 on the back of the backlight is also in an uneven state, which will also affect the design of the terminal casing. In addition, the uneven state of the back of the iron frame 112 requires an additional manufacturing process, which will increase the probability of defective products in production and manufacturing, resulting in an increased probability of abnormalities in the entire backlight, thereby increasing the production and manufacturing costs of the backlight, reducing the product competitiveness of the backlight, and failing to meet the company's growing quality requirements. Utility Model Content

[0004] Based on this, it is necessary to provide a backlight structure to address the above-mentioned technical problems. The iron frame on the back of the backlight is designed to be flat, without an outward convex structure, and an avoidance hole is opened on the right side of the iron frame. The double-sided adhesive between the FPC and the iron frame is cancelled, so that the FPC is located inside the avoidance hole. At the same time, the protective sticker is extended and enlarged and bent to the right side of the iron frame and covers the entire FPC surface on the back and the iron frame surface close to the FPC outer edge, so that the FPC can be fixed to prevent displacement or falling off, and the back of the iron frame is flat, which not only reduces production and manufacturing costs and improves the competitiveness of backlight products, but also better meets the quality requirements of enterprises.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A backlight structure, comprising:

[0007] An iron frame and a light guide module, wherein the light guide module is installed inside the iron frame;

[0008] FPC, the right side of the iron frame is a plane structure and has an avoidance hole, and the FPC is located inside the avoidance hole;

[0009] A protective sticker is arranged at the bottom of the iron frame, one end of the protective sticker is bent to the left side of the iron frame, and the other end of the protective sticker is bent to the right side of the iron frame and covers the avoidance hole. The protective sticker is used to fix the FPC and prevent displacement or falling off.

[0010] Furthermore, the light guide module comprises a light shielding adhesive layer, an upper light enhancement layer, a lower light enhancement layer, a diffusion film, a light guide plate and a reflective film which are connected in sequence, and the FPC is fixedly connected to the light guide plate by a double-sided tape.

[0011] Furthermore, an LED lamp is installed at the bottom end of the light guide plate, and black protective paper is installed between the light-shielding adhesive layer and the diffusion film.

[0012] Furthermore, the FPC includes a main body, a connecting part and a connecting head, a through groove is opened on the lower surface of the iron frame, the through groove is connected to the avoidance hole, the connecting part is located inside the through groove, and the depth of the through groove is the same as the thickness of the connecting part.

[0013] Furthermore, the LED lights are light strips arranged in parallel, and the light strips include a plurality of independent point light sources.

[0014] Furthermore, a heat conductive sheet is fixedly connected to the lower surface of the iron frame, the front side of the heat conductive sheet is fixedly connected to the front inner wall of the iron frame, the rear side of the heat conductive sheet is fixedly connected to the rear inner wall of the iron frame, and the top end of the heat conductive sheet extends to the point light source and leaves a gap with the light guide plate.

[0015] Furthermore, a plurality of hollow gaps are formed on the upper surface of the heat conducting sheet, and a plurality of protrusions are formed on the heat conducting sheet through the hollow gaps, and each of the protrusions corresponds to the position of the point light source.

[0016] Furthermore, the heat conducting sheet is a graphite sheet, and the thickness of the heat conducting sheet is 0.5-1 mm.

[0017] Furthermore, the protective sticker is a single-sided sticker.

[0018] Furthermore, the protective film is a graphite sheet, and the right side of the protective film extends upward.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The backlight structure provided by the utility model designs the iron frame on the back of the backlight to be flat without an external convex structure, and opens an avoidance hole on the right side of the iron frame, thereby eliminating the double-sided adhesive between the FPC and the iron frame, so that the FPC is located inside the avoidance hole, and at the same time, the protective sticker is extended, enlarged and bent to the right side of the iron frame and covers the entire FPC surface on the back and the surface of the iron frame close to the outer edge of the FPC, so that the FPC can be fixed to prevent displacement or falling off, and the back of the iron frame is flat, which not only reduces the production and manufacturing costs and improves the competitiveness of the backlight products, but also better meets the quality requirements of the enterprise.

[0021] The backlight structure provided by the utility model reduces the distance between the point light source and the iron frame by arranging a heat conductive sheet on the iron frame, hollows out gaps so that heat can quickly fill the iron frame, and the heat generated by the point light source on the LED lamp can be transferred to the heat conductive sheet, and the heat is transferred to the iron frame through the heat conductive sheet, thereby accelerating the heat dissipation effect of the LED lamp and prolonging the service life. At the same time, a graphite sheet is used instead of a single-sided adhesive, that is, the graphite sheet covers the FPC and is bent to the bottom of the front side, thereby improving the heat dissipation effect of the iron frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of an existing backlight structure;

[0023] Figure 2 A schematic diagram of the front cross-sectional structure of the backlight structure provided by the utility model;

[0024] Figure 3 A rear view structural schematic diagram of the backlight structure provided by the utility model;

[0025] Figure 4 A schematic diagram of the structure of a graphite sheet used in a protective sticker of a backlight structure provided by the utility model;

[0026] Figure 5 The LED lamp of the backlight structure provided by the utility model is a structural schematic diagram of a light strip.

[0027] The markings in the figure are as follows:

[0028] 1. Iron frame; 2. Light guide module; 3. FPC; 4. Avoidance hole; 5. Protective sticker; 6. Point light source; 7. Heat conductive sheet; 8. Hollow gap; 9. Protrusion; 21. Light-shielding adhesive layer; 22. Upper light-enhancing layer; 23. Lower light-enhancing layer; 24. Diffusion film; 25. Light guide plate; 26. Reflective film; 27. Double-sided tape; 28. LED light; 29. ​​Black protective paper; 31. Main body; 32. Connecting part; 33. Connector; 34. Through slot. DETAILED DESCRIPTION

[0029] 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.

[0030] As mentioned in the background art, the iron frame of the ultra-narrow bottom frame backlight structure is usually uneven, which requires an additional production process for the production and manufacturing of the backlight, which will increase the probability of defective products in the production and manufacturing, and the probability of abnormalities in the entire backlight will also increase, thereby increasing the production and manufacturing costs of the backlight, reducing the product competitiveness of the backlight and failing to meet the company's growing quality requirements.

[0031] In order to solve this technical problem, the utility model provides a backlight structure, in which the iron frame 1 on the back of the backlight is designed to be flat, without a convex structure, and a protective sticker 5 is used to fix the FPC3 to prevent displacement or falling off, so that the back of the iron frame 1 is flat, which not only reduces production and manufacturing costs and improves the competitiveness of backlight products, but also better meets the quality requirements of enterprises.

[0032] Specifically, please refer to Figure 2-5 , the backlight structure specifically includes:

[0033] An iron frame 1 and a light guide module 2, wherein the light guide module 2 is installed inside the iron frame 1;

[0034] FPC3, the right side of the iron frame 1 is a plane structure and has an avoidance hole 4, and the FPC3 is located inside the avoidance hole 4;

[0035] The protective sticker 5 is arranged at the bottom of the iron frame 1, one end of the protective sticker 5 is bent to the left side of the iron frame 1, and the other end of the protective sticker 5 is bent to the right side of the iron frame 1 and covers the avoidance hole 4. The protective sticker 5 is used to fix the FPC3 and prevent displacement or falling off. Since the protective sticker 5 covers the FPC3 and is bent to the bottom of the front side, the protective sticker 5 can help dissipate heat and improve the heat dissipation effect of the iron frame 1.

[0036] The backlight structure provided by the utility model is designed to be flat with an iron frame 1 on the back of the backlight without an external convex structure, and an avoidance hole 4 is opened on the right side of the iron frame 1, and the double-sided adhesive between FPC3 and the iron frame 1 is eliminated, so that the FPC3 is located inside the avoidance hole 4, and at the same time, the protective sticker 5 is extended, enlarged and bent to the right side of the iron frame 1 and covers the entire FPC3 surface on the back and the surface of the iron frame 1 close to the outer edge of the FPC3, so that the FPC3 can be fixed to prevent displacement or falling off, and the back of the iron frame 1 is flat, which not only reduces the production and manufacturing costs and improves the competitiveness of the backlight products, but also better meets the quality requirements of the enterprise.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Please refer to Figure 2-5 , a backlight structure, comprising an iron frame 1 and a light guide module 2, wherein the light guide module 2 is installed inside the iron frame 1;

[0041] FPC3, the right side of the iron frame 1 is a plane structure and has an avoidance hole 4, and the FPC3 is located inside the avoidance hole 4;

[0042] The protective sticker 5 is arranged at the bottom of the iron frame 1, one end of the protective sticker 5 is bent to the left side of the iron frame 1, and the other end of the protective sticker 5 is bent to the right side of the iron frame 1 and covers the avoidance hole 4. The protective sticker 5 is used to fix the FPC3 and prevent displacement or falling off. Since the protective sticker 5 covers the FPC3 and is bent to the bottom of the front side, the protective sticker 5 can help dissipate heat and improve the heat dissipation effect of the iron frame 1.

[0043] The backlight structure provided in this embodiment is achieved by designing the iron frame 1 on the back of the backlight to be flat without an outward convex structure, and opening a avoidance hole 4 on the right side of the iron frame 1, eliminating the double-sided adhesive between the FPC3 and the iron frame 1, so that the FPC3 is located inside the avoidance hole 4, and at the same time, the protective sticker 5 is extended, enlarged and bent to the right side of the iron frame 1 and covers the entire FPC3 surface on the back and the surface of the iron frame 1 close to the outer edge of the FPC3, so that the FPC3 can be fixed to prevent displacement or falling off, and the back of the iron frame 1 is flat, which not only reduces the production and manufacturing costs and improves the competitiveness of the backlight products, but also better meets the quality requirements of the enterprise.

[0044] The backlight structure provided in Example 1 is further optimized. Specifically, Figure 2 As shown, the light guide module 2 includes a light-shielding adhesive layer 21, an upper light-enhancing layer 22, a lower light-enhancing layer 23, a diffusion film 24, a light guide plate 25 and a reflective film 26 which are connected in sequence. The FPC3 is fixedly connected to the light guide plate 25 through a double-sided tape 27. An LED lamp 28 is installed at the bottom end of the light guide plate 25. A black protective paper 29 is installed between the light-shielding adhesive layer 21 and the diffusion film 24. The FPC3 includes a main body 31, a connecting portion 32 and a connecting head 33. A through groove 34 is opened on the lower surface of the iron frame 1. The through groove 34 is connected to the avoidance hole 4. The connecting portion 32 is located inside the through groove 34. The depth of the through groove 34 is the same as the thickness of the connecting portion 32.

[0045] Through the above-mentioned structural design, the double-sided adhesive between FPC3 and the iron frame 1 can be eliminated, and the FPC3 can be completely embedded in the avoidance hole 4, so that the connecting part 32 is located in the through groove 34, and the outer side of the connecting part 32 is in contact with the inner wall of the through groove 34. In this way, the protective sticker 5 covers the entire FPC3 on the back side without causing a gap in the through groove 34, thereby preventing external dust from entering the bottom of the iron frame 1 and improving the service life of the light guide module 2.

[0046] The backlight structure provided in embodiment 1 or 2 is further optimized, such as Figure 4 and Figure 5 As shown, the LED lamp 28 is a lamp strip arranged in parallel, and the lamp strip includes a plurality of independent point-shaped light sources 6; a heat conducting sheet 7 is fixedly connected to the lower surface of the iron frame 1, the front side of the heat conducting sheet 7 is fixedly connected to the front inner wall of the iron frame 1, and the rear side of the heat conducting sheet 7 is fixedly connected to the rear inner wall of the iron frame 1, and the top end of the heat conducting sheet 7 extends to the point-shaped light source 6 and leaves a gap with the light guide plate 25;

[0047] This arrangement reduces the distance between the point light source 6 and the iron frame 1. The point light source 6 on the LED lamp 28 can emit light to the light guide plate 25. At the same time, the heat generated can be transferred to the heat conductive sheet 7, and the heat is transferred to the iron frame 1 through the heat conductive sheet 7, thereby transferring the heat to the iron frame 1 faster for heat dissipation.

[0048] A plurality of hollow gaps 8 are provided on the upper surface of the heat conductive sheet 7, and a plurality of protrusions 9 are formed on the heat conductive sheet 7 through the hollow gaps 8, and each protrusion 9 corresponds to the position of the point light source 6, so that the heat generated by the light emitted by the point light source 6 can be directly transferred to each protrusion 9, and then transferred by each protrusion 9 to the heat conductive sheet 7 and the iron frame 1 to assist in heat dissipation; a plurality of hollow gaps 8 are provided on the upper surface of the heat conductive sheet 7, and a plurality of protrusions 9 are formed on the heat conductive sheet 7 through the hollow gaps 8, and each protrusion 9 corresponds to the position of the point light source 6; the heat conductive sheet 7 is a graphite sheet, and the thickness of the heat conductive sheet 7 is 0.5-1mm.

[0049] The heat generated by such a setting can quickly fill the iron frame 1 through the hollow gap 8, and then transfer the heat to the iron frame 1 through the air between the point light source 6 and the protrusion 9, thereby accelerating the heat dissipation effect of the LED lamp 28 and improving the service life. The thickness of the heat conductive sheet 7 can be selected to be 0.8mm, which is not only more convenient to manufacture but also lower in cost and can meet the thermal conductivity requirements.

[0050] The backlight structure provided in the above embodiments is further optimized, such as Figure 3 and Figure 4 As shown, the protective sticker 5 is a single-sided sticker, or the protective sticker 5 is a graphite sheet, and the right side of the protective sticker 5 extends upward so that the graphite sheet wraps more of the iron frame 1.

[0051] With such a structural design, the protective sticker 5 can not only cover the entire FPC3 surface on the back and the surface of the iron frame 1 close to the outer edge of the FPC3, thereby fixing the FPC3 to prevent displacement or falling off, but also the graphite sheet-type protective sticker 5 has better thermal conductivity, thereby improving the heat dissipation effect of the iron frame 1.

[0052] The use process of the backlight structure provided by the utility model is as follows:

[0053] By designing the iron frame 1 on the back of the backlight to be flat without an external convex structure, and opening an avoidance hole 4 on the right side of the iron frame 1, the double-sided adhesive between the FPC3 and the iron frame 1 is cancelled, so that the FPC3 is located inside the avoidance hole 4, and at the same time, the protective sticker 5 is extended, enlarged, bent to the right side of the iron frame 1 and covers the entire FPC3 surface on the back and the surface of the iron frame 1 close to the outer edge of the FPC3, so that the FPC3 can be fixed to prevent displacement or falling off, and the back of the iron frame 1 is flat, which not only reduces the production and manufacturing costs, but also improves the competitiveness of the backlight products. In order to better meet the quality requirements of the enterprise, a heat conductive sheet 7 is arranged on the iron frame 1 to reduce the distance between the point light source 6 and the iron frame 1, and the hollow gap 8 is used to allow the heat to quickly fill the iron frame 1. The heat generated by the point light source 6 on the LED lamp 28 can be transferred to the heat conductive sheet 7, and the heat is transferred to the iron frame 1 through the heat conductive sheet 7, thereby accelerating the heat dissipation effect of the LED lamp 28 and improving the service life. At the same time, a graphite sheet is used instead of a single-sided adhesive, that is, the graphite sheet covers the FPC3 and is bent to the bottom of the front side, thereby improving the heat dissipation effect of the iron frame 1.

[0054] 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.

[0055] 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 structure, characterized in that: It includes: An iron frame (1) and a light guide module (2), wherein the light guide module (2) is installed inside the iron frame (1); The FPC (3) is a plane structure on the right side of the iron frame (1) and is provided with an avoidance hole (4), and the FPC (3) is located inside the avoidance hole (4); a protective sticker (5) is arranged at the bottom of the iron frame (1), one end of the protective sticker (5) is bent to the left side of the iron frame (1), and the other end of the protective sticker (5) is bent to the right side of the iron frame (1) and covers the avoidance hole (4), and the protective sticker (5) is used to fix the FPC (3) and prevent displacement or falling off.

2. The backlight structure according to claim 1, characterized in that: The light guide module (2) comprises a light shielding adhesive layer (21), an upper light enhancement layer (22), a lower light enhancement layer (23), a diffusion film (24), a light guide plate (25) and a reflective film (26) which are connected in sequence, and the FPC (3) is fixedly connected to the light guide plate (25) via a double-sided tape (27).

3. The backlight structure according to claim 2, characterized in that: An LED lamp (28) is installed at the bottom end of the light guide plate (25), and black protective paper (29) is installed between the light shielding adhesive layer (21) and the diffusion film (24).

4. The backlight structure according to claim 1, characterized in that: The FPC (3) comprises a main body (31), a connecting portion (32) and a connecting head (33); a through slot (34) is provided on the lower surface of the iron frame (1); the through slot (34) is connected to the avoidance hole (4); the connecting portion (32) is located inside the through slot (34); and the depth of the through slot (34) is the same as the thickness of the connecting portion (32).

5. The backlight structure according to claim 3, characterized in that: The LED lights (28) are light strips arranged in parallel, and the light strips include a plurality of independent point-shaped light sources (6).

6. The backlight structure according to claim 5, characterized in that: A heat conducting sheet (7) is fixedly connected to the lower surface of the iron frame (1); the front side of the heat conducting sheet (7) is fixedly connected to the front inner wall of the iron frame (1); the rear side of the heat conducting sheet (7) is fixedly connected to the rear inner wall of the iron frame (1); the top end of the heat conducting sheet (7) extends to the point light source (6) and leaves a gap with the light guide plate (25).

7. The backlight structure according to claim 6, characterized in that: The upper surface of the heat conducting sheet (7) is provided with a plurality of hollow gaps (8), and the heat conducting sheet (7) is provided with a plurality of protrusions (9) through the hollow gaps (8), and each of the protrusions (9) corresponds to the position of a point-shaped light source (6).

8. The backlight structure according to claim 6, characterized in that: The heat conducting sheet (7) is a graphite sheet, and the thickness of the heat conducting sheet (7) is 0.5-1 mm.

9. The backlight structure according to claim 1, characterized in that: The protective sticker (5) is a single-sided sticker.

10. The backlight structure according to claim 1, characterized in that: The protective film (5) is a graphite sheet, and the right side of the protective film (5) extends upwards.

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