Backlight module for improving interference hidden danger of light guide plate

Abstract

The backlight module comprises an iron frame, the light guide plate, a display screen, a light emitting source and an optical film material assembly, the light guide plate, the display screen and the light emitting source are all installed in the iron frame, and protruding points are arranged on the side, close to the light emitting source, of the light guide plate; the optical film material assembly is installed between the light guide plate and the display screen, a through groove is formed in the optical film material assembly, and the protruding points extend into the through groove. According to the backlight module capable of improving the interference hidden danger of the light guide plate, the receding grooves are formed in the positions, corresponding to the protruding points, of the double-faced adhesive tape foam for receding design treatment, so that when the height of the protruding points deviates from the upper limit, the protruding points can extend into the receding grooves, the double-faced adhesive tape foam cannot be jacked up, and the light guide plate is prevented from being damaged. In addition, the black gummed paper is used for shading, the problem of light leakage does not exist on the surface of the position, and the assembling effect of the backlight module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of backlight modules, in particular to a backlight module capable of improving the hidden danger of interference of light guide plates. Background Art

[0002] like Figure 1 As shown, in a conventional backlight display module without a middle iron frame and a middle plastic frame, the film material 111 is limited by the position of the opening 113 of the surrounding iron frames 112. At the same time, in order to accurately align the film material 111, a convex point 115 is usually added at the position of the light guide plate 114. The convex point 115 is usually added on one side of the LED lamp 116, because the space on this side is relatively large, and in order to block the light of the LED lamp 116 that penetrates through the gap of the film material 111, a black foam 117 is added to cover this side. The black foam 117 is soft and has a certain buffering effect to prevent the backlight from hard-to-hard collision with the glass of the liquid crystal display screen 118. However, the black foam 117 is easy to drop debris and cause contamination, so the conventional practice is to cover the foam with a piece of black adhesive tape 119;

[0003] In order to better align and limit the film material 111, the height of the protrusion 115 of the light guide plate 114 is designed to be flush with the surface of the film material 111. However, due to processing errors, when the height of the protrusion 115 of the light guide plate 114 is closer to the upper limit, it will be higher than the surface of the film material 111. At this time, the protrusion 115 will push up the black foam 117, and there is a risk of interference with the bottom of the liquid crystal display 118, affecting the assembly effect of the backlight module. Utility Model Content

[0004] Based on this, it is necessary to provide a backlight module that improves the interference risk of the light guide plate in response to the above-mentioned technical problems. The double-sided adhesive foam is provided with an avoidance groove at the corresponding position of the convex point for avoidance design treatment. In this way, when the convex point is at the upper limit of the height, the convex point will extend into the avoidance groove and will not push up the double-sided adhesive foam, thereby eliminating the interference risk between the double-sided adhesive foam and the black tape and the liquid crystal display, and improving the assembly effect of the backlight module.

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

[0006] A backlight module for improving the potential interference risk of a light guide plate, comprising:

[0007] An iron frame, a light guide plate, a display screen and a light source, wherein the light guide plate, the display screen and the light source are all installed inside the iron frame, and a convex point is arranged on a side of the light guide plate close to the light source;

[0008] An optical film assembly, wherein the optical film assembly is installed between the light guide plate and the display screen, and a through groove is formed on the optical film assembly, and the convex point extends to the inside of the through groove;

[0009] Double-sided adhesive foam and black adhesive tape, the double-sided adhesive foam is pasted on the side of the optical film material component away from the light guide plate and covers the through groove, the double-sided adhesive foam is provided with an avoidance groove corresponding to the through groove, and the black adhesive tape is pasted on the side of the double-sided adhesive foam away from the optical film material component.

[0010] Furthermore, the avoidance groove runs through the left and right sides of the double-sided adhesive foam, and a distance of 0.5 mm is left between the avoidance groove and the convex point.

[0011] Furthermore, the avoidance groove is in the shape of a groove, and the avoidance groove is arranged on a side of the double-sided adhesive foam close to the optical film material component, and a distance of 0.5 mm is left between the avoidance groove and the convex point.

[0012] Furthermore, a plurality of openings are formed on the outer side of the iron frame, and a plurality of protrusions are fixedly connected to the outer surface of the optical film material assembly, and the protrusions are located inside the openings.

[0013] Furthermore, the light source includes an LED lamp and an FPC connected to the LED lamp, and the LED lamp is installed on one side of the protrusion.

[0014] Furthermore, the optical film assembly includes a first brightness enhancement film, a second brightness enhancement film and a diffusion film which are connected in sequence, and the diffusion film is attached to the light guide plate.

[0015] Furthermore, a reflective film is installed between the iron frame and the light guide plate, and the reflective film extends to the top of the light guide plate.

[0016] Furthermore, the black adhesive tape is a film structure and is equal in size to the double-sided adhesive foam, and the thickness of the black adhesive tape is 0.2-0.3 mm.

[0017] Furthermore, a graphite heat conductive sheet is pasted between the double-sided adhesive foam and the optical film material assembly, and the graphite heat conductive sheet is provided with a through hole corresponding to the avoidance groove.

[0018] Furthermore, a plurality of heat dissipation holes are provided on the double-sided adhesive foam and the black adhesive tape, and the heat dissipation holes are in a circular structure and are provided on a side away from the through groove.

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

[0020] The utility model provides a backlight module for improving the potential interference hazard of a light guide plate, wherein avoidance grooves are provided at positions corresponding to the convex points of the double-sided adhesive foam. At this time, after the optical film material assembly is installed, the convex points on the light guide plate will be located in the through grooves. Due to the avoidance design treatment at the double-sided adhesive foam, a hole position with a single side that is 0.5 mm larger than the convex point is added to the double-sided adhesive foam at this position, and the black adhesive tape on the upper surface of the double-sided adhesive foam is not changed. In this way, when the convex point is at an upper limit of height, the convex point will extend into the avoidance groove and will not push up the double-sided adhesive foam, thereby eliminating the potential interference hazard of the double-sided adhesive foam and the black adhesive tape with the liquid crystal display screen. In addition, the black adhesive tape is used for shading, and there will be no light leakage problem on the surface at this position, thereby improving the assembly effect of the backlight module.

[0021] The utility model provides a backlight module that improves the hidden danger of interference of the light guide plate. A graphite heat conductive sheet is pasted between the double-sided adhesive foam and the optical film material assembly, and a plurality of heat dissipation holes are opened on the double-sided adhesive foam and the black tape. Since the graphite heat conductive sheet has good thermal conductivity, the heat dissipation holes can help it to dissipate heat. Such a heat dissipation structure can reduce the temperature inside the backlight module, improve the working environment of the optical film material assembly, avoid overheating and deformation of the optical film material assembly, and improve the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of the existing backlight module provided by the utility model;

[0023] Figure 2 A schematic diagram of the front cross-sectional structure of a backlight module for improving the potential interference risk of a light guide plate provided by the utility model;

[0024] Figure 3 A schematic diagram of the back structure of a backlight module for improving the potential interference of light guide plates provided by the utility model;

[0025] Figure 4 A schematic diagram of the structure of using double-sided adhesive foam on the back of a backlight module to improve the potential interference risk of a light guide plate provided by the utility model;

[0026] Figure 5 A schematic diagram of the structure of using black adhesive tape on the back of a backlight module for improving the potential interference risk of a light guide plate provided by the utility model;

[0027] Figure 6 A schematic structural diagram of adding a graphite heat conducting sheet to the back of a backlight module for improving the potential interference risk of a light guide plate provided by the utility model.

[0028] The markings in the figure are as follows:

[0029] 1. Iron frame; 2. Light guide plate; 3. Display screen; 4. Light source; 5. Bump; 6. Optical film assembly; 7. Through slot; 8. Double-sided adhesive foam; 9. Black adhesive tape; 10. Avoidance slot; 11. Graphite heat conductive sheet; 1101. Through hole; 12. Heat dissipation hole; 101. Opening; 102. Protrusion; 401. LED lamp; 402. FPC; 601. First brightness enhancement film; 602. Second brightness enhancement film; 603. Diffusion film; 604. Reflection film. DETAILED DESCRIPTION

[0030] 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.

[0031] As described in the background technology, due to processing errors, the existing backlight module will be higher than the surface of the film material when the height of the protrusions of the light guide plate is closer to the upper limit. At this time, the protrusions will push up the black foam, posing a risk of interference with the bottom of the LCD screen, affecting the assembly effect of the backlight module.

[0032] In order to solve this technical problem, the utility model provides a backlight module that improves the interference risk of the light guide plate. The utility model eliminates the interference risk between the double-sided adhesive foam 8 and the black tape 9 and the liquid crystal display screen 3 by providing an avoidance groove 10 at the corresponding position of the convex point 5 on the double-sided adhesive foam 8.

[0033] Specifically, please refer to Figure 2-5 The backlight module that improves the potential interference of the light guide plate specifically includes:

[0034] An iron frame 1, a light guide plate 2, a display screen 3 and a light source 4, wherein the light guide plate 2, the display screen 3 and the light source 4 are all installed inside the iron frame 1, and a convex point 5 is arranged on one side of the light guide plate 2 close to the light source 4;

[0035] An optical film component 6 is installed between the light guide plate 2 and the display screen 3. A through groove 7 is formed on the optical film component 6, and the convex point 5 extends to the inside of the through groove 7.

[0036] Double-sided adhesive foam 8 and black adhesive tape 9, the double-sided adhesive foam 8 is pasted on the side of the optical film material assembly 6 away from the light guide plate 2 and covers the through groove 7, and an avoidance groove 10 corresponding to the through groove 7 is opened on the double-sided adhesive foam 8, and the black adhesive tape 9 is pasted on the side of the double-sided adhesive foam 8 away from the optical film material assembly 6.

[0037] The utility model provides a backlight module for improving the interference hazard of the light guide plate. By providing an avoidance groove 10 at the position corresponding to the convex point 5 of the double-sided adhesive foam 8, after the optical film material assembly 6 is installed, the convex point 5 on the light guide plate 2 will be located in the through groove 7. Due to the avoidance design treatment at the double-sided adhesive foam 8, a hole position with a single side larger than the convex point 5 by 0.5 mm is added to the double-sided adhesive foam 8 at this position, and the black adhesive tape 9 on the upper surface of the double-sided adhesive foam 8 is not changed. In this way, when the convex point 5 is at the upper limit of the height, the convex point 5 will extend into the avoidance groove 10 and will not push up the double-sided adhesive foam 8, thereby eliminating the interference hazard of the double-sided adhesive foam 8 and the black adhesive tape 9 with the liquid crystal display screen 3. In addition, the black adhesive tape 9 is used for shading, and there will be no light leakage problem on the surface at this position, thereby improving the assembly effect of the backlight module.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Please refer to Figure 2-5 A backlight module for improving the interference risk of a light guide plate, comprising an iron frame 1, a light guide plate 2, a display screen 3 and a light source 4, wherein the light guide plate 2, the display screen 3 and the light source 4 are all installed inside the iron frame 1, and a convex point 5 is arranged on one side of the light guide plate 2 close to the light source 4;

[0042] An optical film component 6 is installed between the light guide plate 2 and the display screen 3. A through groove 7 is formed on the optical film component 6, and the convex point 5 extends to the inside of the through groove 7.

[0043] Double-sided adhesive foam 8 and black adhesive tape 9, the double-sided adhesive foam 8 is pasted on the side of the optical film material assembly 6 away from the light guide plate 2 and covers the through groove 7, and an avoidance groove 10 corresponding to the through groove 7 is opened on the double-sided adhesive foam 8, and the black adhesive tape 9 is pasted on the side of the double-sided adhesive foam 8 away from the optical film material assembly 6.

[0044] Please refer to Figure 1-5By opening an avoidance groove 10 at the position corresponding to the convex point 5 of the double-sided adhesive foam 8, after the optical film material assembly 6 is installed, the convex point 5 on the light guide plate 2 will be located in the through groove 7. Due to the avoidance design treatment at the double-sided adhesive foam 8, a hole position with a single side larger than the convex point 5 by 0.5 mm is added to the double-sided adhesive foam 8 at this position, and the black adhesive tape 9 on the upper surface of the double-sided adhesive foam 8 is not changed. In this way, when the convex point 5 is at the upper limit of the height, the convex point 5 will extend into the avoidance groove 10, and will not push up the double-sided adhesive foam 8, thereby eliminating the hidden danger of interference between the double-sided adhesive foam 8 and the black adhesive tape 9 and the liquid crystal display screen 3, and the black adhesive tape 9 is used for light shielding, so there will be no light leakage problem on the surface of this position, thereby improving the assembly effect of the backlight module.

[0045] The backlight module for improving the interference risk of the light guide plate provided in Example 1 is further optimized. Specifically, Figure 2 As shown, the avoidance groove 10 runs through the left and right sides of the double-sided adhesive foam 8, and a distance of 0.5 mm is left between the avoidance groove 10 and the protrusion 5; a plurality of openings 101 are opened on the outside of the iron frame 1, and a plurality of protrusions 102 are fixedly connected to the outer surface of the optical film material assembly 6, and the protrusion 102 is located inside the opening 101; the light source 4 includes an LED lamp 401 and an FPC 402 connected to the LED lamp 401, and the LED lamp 401 is installed on one side of the protrusion 5.

[0046] Through the above structural design, the avoidance groove 10 is larger than the size of the protrusion 5, so that the protrusion 5 can be better extended into the avoidance groove 10. A plurality of openings 101 are opened on the outside of the iron frame 1 to limit the position of the optical film assembly 6, making installation and positioning more convenient.

[0047] The backlight module for improving the potential interference of the light guide plate provided in Example 1 or 2 is further optimized, such as Figure 2-5 As shown, the avoidance groove 10 is in the shape of a groove, and the avoidance groove 10 is opened on the side of the double-sided adhesive foam 8 close to the optical film material component 6, and a distance of 0.5 mm is left between the avoidance groove 10 and the protrusion 5; the optical film material component 6 includes a first brightness enhancement film 601, a second brightness enhancement film 602 and a diffusion film 603 connected in sequence, and the diffusion film 603 is attached to the light guide plate 2;

[0048] Through the above structural design, the avoidance groove 10 is larger than the size of the convex point 5, so that the convex point 5 can be better extended into the avoidance groove 10. At the same time, since the avoidance groove 10 is in the shape of a groove, the light of the LED lamp 401 passing through the gap of the optical film material component 6 can be blocked, so that the shading effect is better.

[0049] A reflective film 604 is installed between the iron frame 1 and the light guide plate 2, and the reflective film 604 extends to the top of the light guide plate 2; the black adhesive tape 9 is a thin film structure and is equal to the size of the double-sided adhesive foam 8, and the thickness of the black adhesive tape 9 is 0.2-0.3mm.

[0050] Through the above structural design, the reflective film 604 can reflect the light emitted from the light guide plate 2, so that more light is irradiated on the optical film material component 6, and the thickening of the black tape 9 can avoid light leakage.

[0051] The backlight module for improving the interference risk of the light guide plate provided in the above embodiments is further optimized, such as Figure 2 and Figure 6 As shown, a graphite heat conductive sheet 11 is pasted between the double-sided adhesive foam 8 and the optical film material assembly 6, and a through hole 1101 corresponding to the avoidance groove 10 is opened on the graphite heat conductive sheet 11; a plurality of heat dissipation holes 12 are opened on the double-sided adhesive foam 8 and the black adhesive tape 9, and the heat dissipation holes 12 are circular in structure, and are opened on the side away from the through groove 7.

[0052] This arrangement is achieved by pasting a graphite heat conductive sheet 11 between the double-sided adhesive foam 8 and the optical film material assembly 6, and a plurality of heat dissipation holes 12 are opened on the double-sided adhesive foam 8 and the black tape 9. Since the graphite heat conductive sheet 11 has good thermal conductivity, the heat dissipation holes 12 can help it to dissipate heat. Such a heat dissipation structure can reduce the temperature inside the backlight module, improve the working environment of the optical film material assembly 6, and avoid overheating and deformation of the optical film material assembly 6.

[0053] The use process of the backlight module provided by the utility model for improving the interference risk of the light guide plate is as follows:

[0054] By providing an avoidance groove 10 at the position corresponding to the convex point 5 of the double-sided adhesive foam 8, after the optical film material assembly 6 is installed, the convex point 5 on the light guide plate 2 will be located in the through groove 7. Due to the avoidance design treatment at the double-sided adhesive foam 8, a hole position with a single side larger than the convex point 5 by 0.5 mm is added to the double-sided adhesive foam 8 at this position, and the black adhesive tape 9 on the upper surface of the double-sided adhesive foam 8 is not changed. In this way, when the convex point 5 is at the upper limit of the height, the convex point 5 will extend into the avoidance groove 10, and will not push up the double-sided adhesive foam 8, thereby preventing the double-sided adhesive foam 8 and the black adhesive tape 9 from interfering with the liquid crystal display screen 3. The surface of this position will not have any light leakage problem, thereby improving the assembly effect of the backlight module, and a graphite heat conductive sheet 11 is pasted between the double-sided adhesive foam 8 and the optical film material component 6, and a plurality of heat dissipation holes 12 are provided on the double-sided adhesive foam 8 and the black adhesive tape 9. Since the graphite heat conductive sheet 11 has good thermal conductivity, the heat dissipation holes 12 can help it to dissipate heat. Such a heat dissipation structure can reduce the temperature inside the backlight module, improve the working environment of the optical film material component 6, avoid overheating and deformation of the optical film material component 6, and improve the display effect.

[0055] 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.

[0056] 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 module for improving the potential interference of a light guide plate, characterized in that: It includes: An iron frame (1), a light guide plate (2), a display screen (3) and a light source (4), wherein the light guide plate (2), the display screen (3) and the light source (4) are all installed inside the iron frame (1), and a convex point (5) is provided on a side of the light guide plate (2) close to the light source (4); An optical film material component (6), the optical film material component (6) being installed between the light guide plate (2) and the display screen (3), the optical film material component (6) being provided with a through groove (7), and the protrusion (5) extending to the interior of the through groove (7); Double-sided adhesive foam (8) and black adhesive tape (9), wherein the double-sided adhesive foam (8) is adhered to a side of the optical film material component (6) away from the light guide plate (2) and covers the through groove (7), and an avoidance groove (10) corresponding to the through groove (7) is provided on the double-sided adhesive foam (8), and the black adhesive tape (9) is adhered to a side of the double-sided adhesive foam (8) away from the optical film material component (6).

2. The backlight module for improving the potential interference of light guide plates according to claim 1, characterized in that: The avoidance groove (10) runs through the left and right sides of the double-sided adhesive foam (8), and a distance of 0.5 mm is left between the avoidance groove (10) and the convex point (5).

3. The backlight module for improving the potential interference of light guide plates according to claim 1, characterized in that: The avoidance groove (10) is in the shape of a groove. The avoidance groove (10) is provided on a side of the double-sided adhesive foam (8) close to the optical film material component (6). A distance of 0.5 mm is left between the avoidance groove (10) and the convex point (5).

4. The backlight module for improving the potential interference of light guide plates according to claim 1, characterized in that: The outer side of the iron frame (1) is provided with a plurality of openings (101); the outer surface of the optical film assembly (6) is fixedly connected with a plurality of protrusions (102); the protrusions (102) are located inside the openings (101).

5. The backlight module for improving the potential interference of light guide plates according to claim 4, characterized in that: The light source (4) comprises an LED lamp (401) and an FPC (402) connected to the LED lamp (401); the LED lamp (401) is mounted on one side of the protrusion (5).

6. The backlight module for improving the potential interference of light guide plates according to claim 1, characterized in that: The optical film assembly (6) comprises a first brightness enhancement film (601), a second brightness enhancement film (602), and a diffusion film (603) which are connected in sequence, and the diffusion film (603) is bonded to the light guide plate (2).

7. The backlight module for improving the potential interference of light guide plates according to claim 5, characterized in that: A reflective film (604) is installed between the iron frame (1) and the light guide plate (2), and the reflective film (604) extends to the top of the light guide plate (2).

8. The backlight module for improving the potential interference of light guide plates according to claim 1, characterized in that: The black adhesive tape (9) is a thin film structure and is equal in size to the double-sided adhesive foam (8). The thickness of the black adhesive tape (9) is 0.2-0.3 mm.

9. The backlight module for improving the potential interference of light guide plates according to claim 8, characterized in that: A graphite heat conducting sheet (11) is adhered between the double-sided adhesive foam (8) and the optical film assembly (6), and a through hole (1101) corresponding to the avoidance groove (10) is provided on the graphite heat conducting sheet (11).

10. The backlight module for improving the potential interference of light guide plates according to claim 9, characterized in that: The double-sided adhesive foam (8) and the black adhesive tape (9) are both provided with a plurality of heat dissipation holes (12), the heat dissipation holes (12) are in a circular structure, and the heat dissipation holes (12) are provided on a side away from the through groove (7).

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