Light leakage prevention backlight module and display device

Abstract

According to the light leakage prevention backlight module and the display device, a black double-faced adhesive tape capable of absorbing reflected light rays is manufactured on the surface of an FPC on one side of a light-emitting face of an LED lamp, the original white adhesive face of the double-faced adhesive tape is changed into black, and due to the fact that the adhesive tape is provided with the black face, the reflected light rays are absorbed, the shading effect can be achieved, and the problems of light transmission and light leakage are solved; and therefore, the use experience of a user is improved, the product competitiveness of the backlight module is improved, and the ever-increasing quality requirement of an enterprise is met.

Description

Technical Field

[0001] The utility model relates to the technical field of display screens, in particular to a light leakage-proof backlight module and a display device. Background Art

[0002] In the existing backlight module, the backlight FPC is attached to the backlight frame with double-sided tape. However, the sticky surface of the double-sided tape is usually white, which easily reflects light. This causes the light inside the backlight module to leak out from the gap between the backlight FPC and the backlight frame due to the reflection of the double-sided tape, which in turn causes backlight leakage, reducing the competitiveness of the product. Utility Model Content

[0003] In order to solve the deficiencies of the above-mentioned prior art, the utility model provides an anti-light leakage backlight module and a display device, by making a black double-sided tape that can absorb reflected light on the surface of the FPC on the side of the light-emitting surface of the LED lamp, and by changing the white color of the original double-sided tape adhesive surface to black, since the tape has a black surface, the reflected light is absorbed, which can play a shading role and avoid the problem of light transmission and leakage, thereby improving the user experience and the product competitiveness of the backlight module, thereby meeting the company's growing quality requirements.

[0004] The technical problem to be solved by the utility model is achieved through the following technical solution: an anti-light leakage backlight module, comprising:

[0005] A rubber frame, wherein the upper surface of the bottom edge of the rubber frame is provided with a groove;

[0006] A reflective sheet, which is fixed to the bottom of the plastic frame;

[0007] A light guide plate is disposed above the reflective sheet and embedded in the plastic frame, with the light incident surface of the bottom of the light guide plate facing the bottom surface of the groove;

[0008] FPC, and LED lights soldered on the FPC;

[0009] Double-sided adhesive tape, the FPC is adhered to the lower side of the light guide plate through the double-sided adhesive tape;

[0010] The double-sided adhesive tape is attached to the surface of the FPC avoiding the LED, and the side of the double-sided adhesive tape that is bonded to the adhesive frame is black.

[0011] As a preferred implementation of the light leakage prevention backlight module provided by the utility model, the LED is received in the groove through the double-sided adhesive tape, and the light emitting surface of the LED faces the light incident surface of the light guide plate.

[0012] As a preferred embodiment of the anti-light leakage backlight module provided by the utility model, the FPC includes a substrate layer, a circuit layer arranged on the upper surface of the substrate layer, and a metal heat dissipation layer arranged on the lower surface of the substrate layer.

[0013] As a preferred embodiment of the anti-light leakage backlight module provided by the utility model, the FPC also includes at least one through-hole penetrating the substrate layer, the circuit layer and the metal heat dissipation layer, and the inner wall of the through-hole is provided with a thermal conductive layer in contact with the circuit layer and the metal heat dissipation layer.

[0014] As a preferred implementation of the light leakage prevention backlight module provided by the utility model, a heat conductor connected to an external heat conductive structure is arranged in the through hole, and the heat conductor is in contact with the heat conductive layer.

[0015] As a preferred implementation of the light leakage prevention backlight module provided by the utility model, the structure of the metal heat dissipation layer is a mesh structure, a strip structure, a wavy structure or a honeycomb structure.

[0016] As a preferred embodiment of the anti-light leakage backlight module provided by the utility model, a two-dimensional code laser area is provided on the upper surface of the FPC, and a black ink layer and a white ink layer provided on the black ink layer are provided on the upper surface of the FPC located on the two-dimensional code laser area, and the white ink layer is formed with a two-dimensional code by laser.

[0017] As a preferred implementation of the light leakage prevention backlight module provided by the utility model, the thickness of the black ink layer is 30 μm to 40 μm.

[0018] As a preferred implementation of the light leakage prevention backlight module provided by the utility model, the thickness of the white ink layer is 10 μm to 20 μm.

[0019] A display device comprises the anti-light leakage backlight module as described in any one of the above items.

[0020] The utility model has the following beneficial effects: a light leakage prevention backlight module, comprising: a rubber frame, the upper surface of the bottom edge of the rubber frame is provided with a groove; a reflective sheet, which is fixed to the bottom of the rubber frame; a light guide plate, which is arranged above the reflective sheet and embedded in the rubber frame, with the light incident surface of the bottom of the light guide plate facing the bottom surface of the groove; an FPC, and an LED lamp welded on the FPC; a double-sided adhesive tape, wherein the FPC is pasted below the light incident surface of the light guide plate through the double-sided adhesive tape; the double-sided adhesive tape avoids the LED and is adhered to the surface of the FPC, and the side of the double-sided adhesive tape that is adhered to the rubber frame is black. The present application manufactures a black double-sided adhesive tape that can absorb reflected light on the surface of the FPC on the light-emitting side of the LED lamp, and changes the original white color of the double-sided adhesive surface to black. Since the adhesive tape is on the black side, the reflected light is absorbed, which can play a light-shielding role and avoid the problem of light transmission and leakage, thereby improving the user experience and the product competitiveness of the backlight module, thereby meeting the growing quality requirements of enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 A side sectional view of the light leakage prevention backlight module provided by the utility model;

[0023] Figure 2 A schematic diagram of the FPC double-sided adhesive tape of the light leakage prevention backlight module provided by the utility model;

[0024] Figure 3 A front view of the light leakage prevention backlight module provided by the utility model;

[0025] Figure 4 A schematic diagram of the FPC structure of the light leakage prevention backlight module provided by the utility model;

[0026] Figure 5 This is a schematic structural diagram of the FPC two-dimensional code laser area of ​​the anti-light leakage backlight module provided by the utility model.

[0027] 1. Rubber frame; 11. Groove; 2. Reflector; 3. Light guide plate; 4. FPC; 41. Base material layer; 42. Circuit layer; 43. Metal heat dissipation layer; 44. Perforation; 401. Black ink layer; 402. White ink layer; 5. Double-sided tape; 6. LED. DETAILED DESCRIPTION

[0028] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, 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 having 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 limiting the present invention.

[0029] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] 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 technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Embodiment 1

[0033] like Figures 1 to 3 As shown, a light leakage prevention backlight module comprises:

[0034] A rubber frame 1, wherein the upper surface of the bottom edge of the rubber frame 1 is provided with a groove 11;

[0035] A reflective sheet 2, which is fixed to the bottom of the plastic frame 1;

[0036] A light guide plate 3 is disposed above the reflective sheet 2 and embedded in the plastic frame 1, with the light incident surface of the bottom of the light guide plate 3 facing the bottom surface of the groove 11;

[0037] FPC4, and LED lamp 6 soldered on FPC4;

[0038] Double-sided adhesive tape 5, the FPC 4 is adhered to the lower side of the light-incoming surface of the light guide plate 3 by means of the double-sided adhesive tape 5;

[0039] The double-sided adhesive tape 5 is attached to the surface of the FPC 4 avoiding the LED 6 , and the side of the double-sided adhesive tape 5 that is bonded to the adhesive frame 1 is black.

[0040] The utility model provides an anti-light leakage backlight module, the FPC4 is adhered to the lower part of the light-incoming surface of the light guide plate by double-sided adhesive, the LED lamp 6 is a side-emitting LED lamp 6 and the light-emitting surface of the LED lamp 6 faces the light-incoming surface of the light guide plate, in order to reduce the light of the LED lamp 6 from leaking out from the glass groove on the side, thereby causing the backlight leakage, a black double-sided adhesive that can absorb reflected light is made on the surface of the FPC4 on the light-emitting surface of the LED lamp 6, and the white color of the original double-sided adhesive surface is changed to black. Since the adhesive tape is a black surface, the reflected light is absorbed, which can play a shading role and avoid the problem of light transmission and leakage, thereby improving the user experience and the product competitiveness of the backlight module, thereby meeting the growing quality requirements of enterprises.

[0041] Furthermore, the LED 6 is received in the groove 11 through the double-sided adhesive tape 5 , and the light-emitting surface of the LED 6 faces the light-incident surface of the light guide plate 3 .

[0042] Embodiment 2

[0043] like Figure 4 As shown, as a further optimization scheme of Example 1, in this embodiment, the FPC4 includes a substrate layer 41, a circuit layer 42 arranged on the upper surface of the substrate layer 41, and a metal heat dissipation layer 43 arranged on the lower surface of the substrate layer 41, and the arrangement method can be that the circuit layer 42 and the metal heat dissipation layer 43 are respectively attached to the substrate layer 41 by double-sided adhesive. Since the thickness of the substrate layer 41 is relatively thin, the heat on the FPC4 can be diffused to the metal heat dissipation layer 43 through the substrate layer 41. The metal heat dissipation layer 43 can effectively increase the heat dissipation area of ​​the FPC4 and play a role in uniform heat dissipation, thereby improving the heat dissipation efficiency of the FPC4. The substrate layer 41 can be any one of polyimide, polyester, polysulfone or polytetrafluoroethylene, the double-sided adhesive is any one of an acrylic adhesive layer or an epoxy resin adhesive layer, and the metal heat dissipation layer 43 can be a copper foil layer.

[0044] Furthermore, the FPC 4 further includes at least one through-hole 44 penetrating the substrate layer 41, the circuit layer 42 and the metal heat dissipation layer 43, and the inner wall of the through-hole 44 is provided with a heat-conducting layer in contact with the circuit layer 42 and the metal heat dissipation layer 43. By utilizing the good thermal conductivity of the through-hole 44, the circuit layer 42 and the metal heat dissipation layer 43 on both sides of the substrate layer 41 can be electrically connected to play a good thermal conductivity function, and the thermal conductive layer can provide a thermal conductive function to achieve a good heat dissipation effect. Among them, the thermal conductive layer can be a copper glue conductive ink layer.

[0045] Furthermore, a heat conductor connected to an external heat-conducting structure is disposed in the through hole 44. The heat conductor is connected to the external heat-conducting structure from one side of the circuit layer 42 and is also in contact with the heat-conducting layer in the through hole 44, so that the circuit layer 42 and the metal heat dissipation layer 43 can be connected to the external heat-conducting structure through the through hole 44, so that the heat in the FPC 4 is diffused to the external heat-conducting structure through the heat conductor in the through hole 44, so as to further improve the heat dissipation efficiency of the FPC 4. Preferably, in order to enable the through hole 44 to be connected to the external heat-conducting structure, the through hole 44 is disposed at the edge of the FPC 4.

[0046] Furthermore, the metal heat dissipation layer 43 is a uniform heat dissipation structure, and its structure can be any one of a mesh structure, a strip structure, a wavy structure or a honeycomb structure. Through the uniform heat dissipation structure, the heat dissipation effect can be better improved.

[0047] like Figure 5 As shown, in this embodiment, a two-dimensional code laser area is also provided on the upper surface of FPC4, and a black ink layer 401 and a white ink layer 402 provided on the black ink layer 401 are provided on the upper surface of FPC4 located on the two-dimensional code laser area, and a two-dimensional code is formed on the white ink layer 402 by laser. Since two layers of ink are provided, the black ink layer 401 and the white ink layer 402, the surface white ink layer 402 is lasered off by laser, exposing the bottom black ink layer 401, and the area where the laser is lasered is displayed as black. The two-dimensional code generated in this way has a good contrast effect and is easy to scan. At the same time, the two-dimensional code will not fall off and be damaged, so as to prevent the two-dimensional code from being invalid, and greatly reduce the labor cost.

[0048] Furthermore, the thickness of the black ink layer 401 is 30 μm to 40 μm. The thickness of the white ink layer 402 is 10 μm to 20 μm. This thickness is the thickness that the commonly used ultraviolet laser can just penetrate, and there is no dust around after the laser irradiation, which has the advantages of high rhythm and efficiency. The reason why the thickness of the lower black ink layer 401 is thicker than the thickness of the upper white ink layer 402 is to avoid laser power energy fluctuations and prevent the black ink layer 401 from being penetrated by the laser and causing damage to the internal layer of FPC4.

[0049] Embodiment 3

[0050] The utility model also provides a display device, having a light leakage-proof backlight module provided by the above utility model embodiment, including a rubber frame 1, wherein the upper surface of the bottom edge of the rubber frame 1 is provided with a groove 11; a reflective sheet 2, which is fixed to the bottom of the rubber frame 1; a light guide plate 3, which is arranged above the reflective sheet 2 and is embedded in the rubber frame 1, and the light incident surface of the bottom of the light guide plate 3 faces the bottom surface of the groove 11; an FPC 4, and an LED lamp 6 welded on the FPC 4; a double-sided adhesive tape 5, wherein the FPC 4 is pasted below the light incident surface of the light guide plate 3 through the double-sided adhesive tape 5; the double-sided adhesive tape 5 avoids the LED 6 and is attached to the surface of the FPC 4, and the side of the double-sided adhesive tape 5 that is bonded to the rubber frame 1 is black. The present application can play a light-shielding role by making a black double-sided adhesive tape that can absorb reflected light on the surface of the FPC 4 on the light-emitting side of the LED lamp 6, thereby avoiding the problem of light transmission and light leakage, thereby improving the user experience and the product competitiveness of the backlight module, thereby meeting the growing quality requirements of enterprises.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the utility model rather than to limit them. Although the embodiments of the utility model are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the utility model can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A light leakage prevention backlight module, characterized in that: include, A rubber frame (1), wherein the upper surface of the bottom edge of the rubber frame (1) is provided with a groove (11); A reflective sheet (2) fixed to the bottom of the plastic frame (1); A light guide plate (3) is arranged above the reflective sheet (2) and embedded in the plastic frame (1), with the light incident surface of the bottom of the light guide plate (3) facing the bottom surface of the groove (11); An FPC (4), and an LED lamp (6) soldered to the FPC (4); Double-sided adhesive tape (5), the FPC (4) is adhered to the lower side of the light-incoming surface of the light guide plate (3) by means of the double-sided adhesive tape (5); The double-sided adhesive tape (5) is adhered to the surface of the FPC (4) avoiding the LED (6), and the side of the double-sided adhesive tape (5) that is bonded to the adhesive frame (1) is black.

2. The light leakage prevention backlight module according to claim 1, characterized in that: The LED (6) passes through the double-sided adhesive tape (5) and is accommodated in the groove (11), with the light-emitting surface of the LED (6) facing the light-incident surface of the light guide plate (3).

3. The light leakage prevention backlight module according to claim 1, characterized in that: The FPC (4) comprises a substrate layer (41), a circuit layer (42) arranged on the upper surface of the substrate layer (41), and a metal heat dissipation layer (43) arranged on the lower surface of the substrate layer (41).

4. The light leakage prevention backlight module according to claim 3, characterized in that: The FPC (4) further comprises at least one through-hole (44) penetrating the substrate layer (41), the circuit layer (42) and the metal heat dissipation layer (43); the inner wall of the through-hole (44) is provided with a heat-conducting layer in contact with the circuit layer (42) and the metal heat dissipation layer (43).

5. The light leakage prevention backlight module according to claim 4, characterized in that: A heat conductor connected to an external heat-conducting structure is arranged in the through hole (44), and the heat conductor is in contact with the heat-conducting layer.

6. The light leakage prevention backlight module according to claim 3, characterized in that: The structure of the metal heat dissipation layer (43) is a mesh structure, a strip structure, a wave structure or a honeycomb structure.

7. The light leakage prevention backlight module according to claim 1, characterized in that: A two-dimensional code laser area is provided on the upper surface of the FPC (4); a black ink layer (401) and a white ink layer (402) provided on the black ink layer (401) are provided on the upper surface of the FPC (4) located on the two-dimensional code laser area; and a two-dimensional code is formed on the white ink layer (402) by laser.

8. The light leakage prevention backlight module according to claim 7, characterized in that: The black ink layer (401) has a thickness of 30 μm to 40 μm.

9. The light leakage prevention backlight module according to claim 7, characterized in that: The thickness of the white ink layer (402) is 10 μm to 20 μm.

10. A display device, characterized in that: The invention comprises the light leakage prevention backlight module as described in any one of claims 1 to 9.

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