Backlight module capable of preventing light leakage and display module

Abstract

The utility model discloses a light leakage prevention backlight module and a display module, and relates to the field of display modules, the backlight module comprises a rear iron frame, a middle iron frame and a film material layer, the middle iron frame is provided with a notch, the notch is used for leading out an FPC, and a shading layer is attached to the front face of the middle iron frame and extends to the side face of the rear iron frame through the notch; a liquid crystal display screen is arranged in a middle iron frame of the backlight module to form a display module, the liquid crystal display screen comprises a lower polaroid, lower-layer glass, upper-layer glass and an upper polaroid which are sequentially stacked from bottom to top, one end of the lower-layer glass extends outwards and is provided with a driving IC, an FPC is bound to the lower-layer glass, and the FPC is bent through a notch of the middle iron frame and extends to the back face of a rear iron frame; according to the utility model, the notch is wrapped by the shading layer, the FPC is prevented from being scratched by burrs of the notch, the U-shaped process groove and the folded edge of the middle iron frame are removed, the problem of light leakage caused by the U-shaped process groove is avoided, the middle iron frame is prevented from slightly warping, light leakage is avoided, the visual effect is enhanced, and the product competitiveness is improved.

Description

Technical Field

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

[0002] With the rapid development of electronic devices, there are more and more electronic devices in our lives. In order to improve the competitiveness of products, companies are paying more and more attention to improving the quality of products to enhance the user experience. The display screen is covered on the backlight module to form a display device. A common problem in the display device is that light leakage is easy to occur, resulting in poor display effect of the display screen. For example, patent application No. CN202320641034.3 discloses a light leakage-proof backlight module, display module and liquid crystal display device. The backlight module includes an iron frame, an LED lamp is arranged in the iron frame, and a shading glue is arranged on the top of the iron frame. A shading glue gasket is arranged on the top of the shading glue corresponding to the position above the LED lamp, and the shading glue gasket is also arranged on the side and bottom of the iron frame near the LED lamp; by setting the shading glue gasket, the light scattering of the LED is blocked from passing through the cover plate, thereby improving the user experience and no longer affecting the photosensitivity function of the mobile phone. After the display screen and the backlight module are assembled, the FPC on the display screen needs to be bent and extended to the back side of the backlight module. The front edge of the middle iron frame on the conventional backlight module is easy to scratch the FPC. Conventional backlight display modules with middle iron frames usually add a folding edge at the bending position of the iron frame FPC to improve the problem of the iron frame scratching the FPC. However, in order to form the iron frame folding edge, it is necessary to add a U-shaped process groove on both sides of the folding edge. This process groove will be closer to the light-emitting area, and there will be a light leakage problem. When the middle iron frame is slightly warped, the light leakage problem will be more serious, which will seriously affect the display effect of the screen and is not conducive to product competition. Therefore, the utility model discloses a light leakage-proof backlight module and display module to solve the above problems. Utility Model Content

[0003] Based on this, it is necessary to provide a light leakage-proof backlight module and display module to address the above-mentioned technical problems, wrap the slot with a light-shielding layer to prevent the edge of the slot from scratching the FPC, remove the U-shaped process groove and the folded edge of the middle iron frame, and eliminate the light leakage problem caused by the U-shaped process groove. The light-shielding layer connects the middle iron frame with the rear iron frame, which can effectively fix the middle iron frame, prevent the middle iron frame from warping slightly, and eliminate light leakage, which greatly improves the display effect of the screen, enhances the visual effect, improves the user experience, and thereby improves the product competitiveness.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A light leakage-proof backlight module comprises a rear iron frame, a middle iron frame and a film material layer, wherein the film material layer is arranged between the rear iron frame and the middle iron frame, and a notch is opened on the middle iron frame, wherein the notch is used to lead out an FPC; and a light shielding layer, wherein the light shielding layer is attached to the front of the middle iron frame and extends to the side of the rear iron frame through the notch.

[0006] As a preferred implementation of the light leakage-proof backlight module provided by the utility model, the light-shielding layer is black adhesive tape.

[0007] As a preferred implementation of the light leakage prevention backlight module provided by the utility model, the width of the light shielding layer is greater than the width of the FPC, and the distance between the two side edges of the light shielding layer and the FPC is 0.5 mm.

[0008] As a preferred implementation of the light leakage prevention backlight module provided by the utility model, the distance between the end surface of the light shielding layer extending to the side surface of the rear iron frame and the bottom of the rear iron frame is 1 mm.

[0009] As a preferred embodiment of the light leakage prevention backlight module provided by the utility model, a reflective film is provided inside the rear iron frame, a light guide plate is attached to the surface of the reflective film, and the film material layer covers the surface of the light guide plate.

[0010] As a preferred embodiment of the anti-light leakage backlight module provided by the utility model, a gap is left between one end of the light guide plate and the side wall of the rear iron frame, and a light strip FPC is arranged on the side wall of the rear iron frame in the gap, and an LED light is installed on the light strip FPC.

[0011] As a preferred embodiment of the light leakage prevention backlight module provided by the utility model, the reflective film is bent along the inner wall of the rear iron frame so that the reflective film wraps the side of the light guide plate and avoids a side of the light guide plate close to the LED lamp.

[0012] As a preferred implementation of the light leakage prevention backlight module provided by the utility model, the film material layer includes a diffusion film, a lower brightness enhancement film and an upper brightness enhancement film which are stacked in sequence.

[0013] A display module comprises the above-mentioned backlight module, wherein a liquid crystal display screen is arranged in a middle iron frame of the backlight module, and the liquid crystal display screen is bonded and fixed to the middle iron frame by double-sided adhesive, and the liquid crystal display screen comprises a lower polarizer, a lower glass, an upper glass and an upper polarizer stacked in sequence from bottom to top, one end of the lower glass extends outward and is provided with a driver IC, an FPC is bound to the lower glass, and the FPC is bent through a notch of the middle iron frame and extends to the back of a rear iron frame.

[0014] As a preferred implementation of the display module provided by the utility model, the distance between the light shielding layer and the lower polarizer is 1 mm.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The light leakage-proof backlight module and display module provided by the utility model wrap the notch with a shading layer to prevent the edge of the notch from scratching the FPC, remove the U-shaped process groove and the folded edge of the middle iron frame, and eliminate the light leakage problem caused by the U-shaped process groove. The shading layer connects the middle iron frame and the rear iron frame together, and can effectively fix the middle iron frame to prevent the middle iron frame from slightly warping and eliminate light leakage, thereby greatly improving the display effect of the screen, enhancing the visual effect, and improving the user experience, thereby improving the product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 A schematic cross-sectional view of the overall structure of the light leakage-proof backlight module provided by the utility model;

[0019] Figure 2 A schematic diagram of the overall structure of the anti-light leakage backlight module provided by the utility model;

[0020] Figure 3 A schematic diagram of the overall structural cross-section of the display module provided by the utility model;

[0021] Figure 4 This is a schematic plan view of the overall structure of the display module provided by the utility model.

[0022] The markings in the figure are as follows:

[0023] 1. Rear iron frame; 2. Middle iron frame; 3. Notch; 4. FPC; 5. Shading layer; 6. Reflective film; 7. Light guide plate; 8. Light bar FPC; 9. LED light; 10. Diffusion film; 11. Lower brightness enhancement film; 12. Upper brightness enhancement film; 13. Double-sided adhesive; 14. Lower polarizer; 15. Lower glass; 16. Upper glass; 17. Upper polarizer; 18. Driver IC. DETAILED DESCRIPTION

[0024] 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.

[0025] As described in the background technology, after the display screen and the backlight module are assembled together, the FPC on the display screen needs to be bent and extended to the back side of the backlight module. The edge of the middle iron frame on the conventional backlight module can easily scratch the FPC. Conventional backlight display modules with middle iron frames usually add a folded edge at the bending position of the iron frame FPC to improve the problem of the iron frame scratching the FPC. However, in order to form the iron frame folded edge, it is necessary to add a U-shaped process groove on both sides of the folded edge. This process groove will be closer to the light-emitting area, resulting in a light leakage problem. When the middle iron frame is slightly warped, the light leakage problem will be more serious, which will seriously affect the display effect of the screen and is not conducive to product competition.

[0026] In order to solve this technical problem, the utility model provides a backlight module and a display module that prevent light leakage, which are applied in the field of display modules.

[0027] Specifically, please refer to Figure 1-2 The anti-light leakage backlight module specifically includes a rear iron frame 1, a middle iron frame 2 and a film material layer, the film material layer is arranged between the rear iron frame 1 and the middle iron frame 2, the middle iron frame 2 is provided with a slot 3, the slot 3 is used to lead out the FPC 4; the light shielding layer 5, the light shielding layer 5 is attached to the front of the middle iron frame 2 and extends to the side of the rear iron frame 1 through the slot 3.

[0028] like Figure 3-4 As shown, the display module includes the above-mentioned backlight module, and a liquid crystal display screen is arranged in the middle iron frame 2 of the backlight module. The liquid crystal display screen is bonded and fixed to the middle iron frame 2 by double-sided tape 13. The liquid crystal display screen includes a lower polarizer 14, a lower glass 15, an upper glass 16 and an upper polarizer 17 stacked in sequence from bottom to top, one end of the lower glass 15 extends outward and is provided with a driver IC 18, and an FPC 4 is bound to the lower glass 15, and the FPC 4 is bent through the notch 3 of the middle iron frame 2 and extends to the back of the rear iron frame 1.

[0029] The light leakage-proof backlight module and display module provided by the utility model adopt a shading layer 5 to wrap the notch 3 to prevent the edge of the notch 3 from scratching the FPC 4, remove the U-shaped process groove and the folded edge of the middle iron frame 2, and eliminate the light leakage problem caused by the U-shaped process groove. The shading layer 5 connects the middle iron frame 2 with the rear iron frame 1, and can effectively fix the middle iron frame 2 to prevent the middle iron frame 2 from slightly warping and eliminating light leakage, which greatly improves the display effect of the screen, enhances the visual effect, improves the user experience, and thus improves the product competitiveness.

[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 accompanying drawings.

[0031] 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.

[0032] 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.

[0033] Please refer to Figure 1-2 , a backlight module for preventing light leakage is provided, which includes a rear iron frame 1, a middle iron frame 2 and a film material layer, the film material layer is arranged between the rear iron frame 1 and the middle iron frame 2, a notch 3 is opened on the middle iron frame 2, the notch 3 is used to lead out FPC4, no downwardly bent edge is set at the notch 3, and no U-shaped process groove is required, in order to ensure that the middle iron frame 2 is not easy to warp, it is also necessary to prevent the edge of the middle iron frame 2 at the notch 3 from scratching the FPC4, a shading layer 5 is attached to the front of the middle iron mouth, the shading layer 5 extends downward through the notch 3 to the side of the rear iron frame 1, the shading layer 5 is black adhesive paper, of course, it can also be black tape, the middle iron frame 2 and the rear iron frame 1 are connected together by the shading layer 5, and the shading layer 5 can block light to avoid light leakage problems.

[0034] like Figure 3-4 As shown, a liquid crystal display screen is bonded to the middle iron frame 2 of the backlight module by double-sided tape 13 to form a display module. The liquid crystal display screen includes a lower polarizer 14, a lower glass 15, an upper glass 16 and an upper polarizer 17 stacked in sequence from bottom to top. One end of the lower glass 15 extends outward and is provided with a driver IC 18. An FPC 4 is bound to the lower glass 15. The FPC 4 is bent through the notch 3 of the middle iron frame 2 and extends to the back of the rear iron frame 1. The distance between the shading layer 5 and the lower polarizer 14 is 1 mm to avoid interference with the lower polarizer 14 and affect the display effect.

[0035] The light leakage-proof backlight module and display module provided in Example 1 are further optimized. Specifically, Figure 1-2As shown, the width of the light shielding layer 5 is greater than the width of the FPC 4, and the distance between the two sides of the light shielding layer 5 and the FPC 4 is 0.5 mm, so as to ensure that the flashing at the notch 3 of the middle iron frame 2 and the FPC 4 can be perfectly separated, thereby protecting the FPC 4 from being scratched. The distance between the end face of the light shielding layer 5 extending to the side of the rear iron frame 1 and the bottom of the rear iron frame 1 is 1 mm, so as to prevent the light shielding layer 5 from exceeding the backlight module after being attached.

[0036] The light leakage-proof backlight module and display module provided in Example 2 are further optimized. Specifically, Figure 1 As shown, a reflective film 6 is provided inside the rear iron frame 1, and a light guide plate 7 is attached to the surface of the reflective film 6. The film material layer covers the surface of the light guide plate 7, and a gap is left between one end of the light guide plate 7 and the side wall of the rear iron frame 1. A light bar FPC8 is provided in the gap on the side wall of the rear iron frame 1, and an LED lamp 9 is installed on the light bar FPC8. The film material layer includes a diffusion film 10, a lower light enhancement film 11 and an upper light enhancement film 12 stacked in sequence. The light bar FPC8 controls the closing and closing of the LED lamp 9. The light of the LED lamp 9 is irradiated to the light guide plate 7 and guided by the light guide plate 7 so that the light is directed upward. The reflective film 6 can prevent the light from irradiating downward, reduce light loss, and improve the light brightness intensity.

[0037] The reflective film 6 is bent along the inner wall of the rear iron frame 1 so that the reflective film 6 wraps around the side of the light guide plate 7 and avoids the side of the light guide plate 7 close to the LED lamp 9. The reflective film 6 wraps around the light guide plate 7 to prevent light from being emitted from the side of the light guide plate 7, further reducing light loss and ensuring that the light from the LED lamp 9 can enter the light guide plate 7.

[0038] The working principle of the light leakage-proof backlight module and display module provided by the utility model is as follows: the slot 3 is wrapped with a shading layer 5 to prevent the edge of the slot 3 from scratching the FPC 4, the U-shaped process groove and the folded edge of the middle iron frame 2 are removed, and the light leakage problem caused by the U-shaped process groove is eliminated, and the shading layer 5 connects the middle iron frame 2 with the rear iron frame 1, which can effectively fix the middle iron frame 2 and prevent the middle iron frame 2 from slightly warping, and eliminate light leakage, which greatly improves the display effect of the screen, enhances the visual effect, improves the user experience, and thus improves the product competitiveness.

[0039] 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.

[0040] 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 light leakage-proof backlight module, comprising a rear iron frame, a middle iron frame and a film material layer, wherein the film material layer is arranged between the rear iron frame and the middle iron frame, characterized in that: The middle iron frame is provided with a notch, the notch is used to lead out the FPC; a light shielding layer is attached to the front of the middle iron frame and extends to the side of the rear iron frame through the notch.

2. The light leakage-proof backlight module according to claim 1, characterized in that: The light-shielding layer is black adhesive tape.

3. The light leakage-proof backlight module according to claim 1, characterized in that: The width of the light shielding layer is greater than the width of the FPC, and the distance between the two sides of the light shielding layer and the FPC is 0.5 mm.

4. The light leakage-proof backlight module according to claim 1, characterized in that: The distance between the end surface of the light shielding layer extending to the side surface of the rear iron frame and the bottom of the rear iron frame is 1 mm.

5. The light leakage-proof backlight module according to claim 1, characterized in that: A reflective film is arranged inside the rear iron frame, a light guide plate is attached to the surface of the reflective film, and the film material layer covers the surface of the light guide plate.

6. The light leakage-proof backlight module according to claim 5, characterized in that: A gap is left between one end of the light guide plate and the side wall of the rear iron frame, a light bar FPC is arranged in the gap on the side wall of the rear iron frame, and an LED lamp is installed on the light bar FPC.

7. The light leakage-proof backlight module according to claim 6, characterized in that: The reflective film is bent along the inner wall of the rear iron frame so that the reflective film wraps the side surface of the light guide plate and avoids a side surface of the light guide plate close to the LED lamp.

8. The light leakage-proof backlight module according to claim 1, characterized in that: The film material layer comprises a diffusion film, a lower brightness enhancement film and an upper brightness enhancement film which are stacked in sequence.

9. A display module, characterized in that: It includes a backlight module as described in any one of claims 1 to 8, wherein a liquid crystal display screen is arranged in a middle iron frame of the backlight module, and the liquid crystal display screen is bonded and fixed to the middle iron frame by double-sided tape. The liquid crystal display screen includes a lower polarizer, a lower layer of glass, an upper layer of glass and an upper polarizer stacked in sequence from bottom to top, one end of the lower layer of glass extends outward and is provided with a driver IC, an FPC is bound to the lower layer of glass, and the FPC is bent through the notch of the middle iron frame and extends to the back of the rear iron frame.

10. The display module according to claim 9, characterized in that: The distance between the light shielding layer and the lower polarizer is 1 mm.

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