Light leakage prevention backlight module and liquid crystal display module

Abstract

The utility model discloses a light leakage prevention backlight module which comprises a backlight support, a light leakage prevention assembly and a light leakage prevention assembly. The backlight lamp strip comprises a lamp strip LED and a lamp strip FPC, the lamp strip LED is arranged in the assembling groove, the lamp strip FPC is provided with a first end and a second end, the first end is located in the assembling groove and connected with the lamp strip LED, and the second end extends out of the backlight support from the upper portion of one side edge of the backlight support; the first shading adhesive tape is adhered and fixed above the backlight bracket, and is provided with a light outlet corresponding to the assembly groove; and the second shading adhesive tape is adhered and fixed between the light bar FPC and the backlight bracket. According to the light leakage prevention backlight module, the problem of light leakage of a gap between the light bar FPC and the backlight support can be solved. The utility model further discloses a liquid crystal display module which comprises the light leakage prevention backlight module.

Description

Technical Field

[0001] This utility model relates to display technology, and more particularly to a backlight module and a liquid crystal display module that prevents light leakage. Background Technology

[0002] The liquid crystal display module consists of two parts: a backlight module and a liquid crystal panel. The backlight module has a U-shaped light-shielding tape on its light-emitting surface. This light-shielding tape serves two purposes: first, its U-shape defines the light-emitting area of ​​the backlight module; second, its double-sided adhesive properties secure the backlight module to the liquid crystal panel.

[0003] The backlight module contains a backlight strip. The FPC of the backlight strip needs to extend from between the light-shielding tape and the backlight bracket of the backlight module to connect to an external power source. This results in the light-shielding tape being actually adhered to the FPC of the backlight strip on the side near the backlight strip, rather than to the backlight bracket, thus reducing the adhesion stability between the light-shielding tape and the backlight bracket. During long-term use, the light-shielding tape is prone to loosening or detaching from the backlight bracket on the side near the backlight strip, leading to an increased gap between the FPC of the backlight strip and the backlight bracket, causing light leakage. Utility Model Content

[0004] To address the shortcomings of the prior art, this utility model provides a backlight module and a liquid crystal display module that prevent light leakage, thereby reducing the problem of light leakage between the light strip FPC and the backlight bracket.

[0005] The technical problem to be solved by this utility model is achieved through the following technical solution:

[0006] A backlight module for preventing light leakage includes:

[0007] A backlight bracket, the backlight bracket having a mounting groove;

[0008] A backlight strip, comprising LED strips and FPC strips, wherein the LED strips are disposed in the mounting groove, and the FPC strips have a first end and a second end, wherein the first end is located in the mounting groove and connected to the LED strips, and the second end extends from above one side of the backlight bracket to the outside of the backlight bracket;

[0009] The first light-shielding tape is bonded and fixed to the top of the backlight bracket and has a light outlet corresponding to the assembly slot.

[0010] The second light-shielding tape is bonded and fixed between the light strip FPC and the backlight bracket.

[0011] Furthermore, the second light-shielding tape includes a first adhesive portion and a second adhesive portion connected in sequence. The first adhesive portion is bonded and fixed to the lower part of the second end of the light strip FPC. After the second adhesive portion is bent relative to the first adhesive portion, it is bonded and fixed to the side of the backlight bracket near the light strip FPC.

[0012] Furthermore, the second light-shielding tape also includes a third adhesive portion connected to the second adhesive portion. After the third adhesive portion is bent relative to the second adhesive portion, it is bonded and fixed to the underside of the backlight bracket near the lamp strip FPC.

[0013] Furthermore, the first light-shielding tape is adhered and fixed to the first end of the light strip FPC on the side closest to the light strip FPC.

[0014] Furthermore, the first light-shielding tape includes a first layer of tape and a second layer of tape, with the second layer of tape bonded and fixed to the side of the first layer of tape near the lamp strip FPC; the light outlet is formed in the first layer of tape.

[0015] Furthermore, the backlight module that prevents light leakage also includes a light guide component, which is disposed in the assembly slot, and the LED strip is located on one side of the light guide component.

[0016] Furthermore, the backlight strip also includes foam adhesive, which is bonded and fixed to the lower side of the first end of the light strip FPC and surrounds the periphery of the light strip LED; the first end of the light strip FPC is bonded and fixed to the backlight bracket and the light guide assembly above the side near it by the foam adhesive.

[0017] Furthermore, the first light-shielding tape is a double-sided adhesive tape, and the second light-shielding tape is a single-sided adhesive tape.

[0018] Furthermore, both the first and second light-blocking tapes are black tapes.

[0019] A liquid crystal display module includes a liquid crystal panel and the aforementioned light leakage prevention backlight module, wherein the liquid crystal panel is bonded and fixed to a first light-shielding tape of the light leakage prevention backlight module.

[0020] The present invention has the following beneficial effects: The backlight module of the present invention uses the second light-shielding tape to bond and fix the light strip FPC to the backlight bracket. In this way, even if the first light-shielding tape and the backlight bracket become loose or fall off on the side near the backlight strip during long-term use, the second light-shielding tape can still limit the relative position between the light strip FPC and the backlight bracket, so as to prevent the gap between the light strip FPC and the backlight bracket from increasing, thereby avoiding the problem of light leakage through the gap. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the upper structure of the backlight module for preventing light leakage provided by this utility model.

[0022] Figure 2 This is a schematic diagram of the lower structure of the backlight module for preventing light leakage provided by this utility model.

[0023] Figure 3 A cross-sectional structural diagram of the backlight module for preventing light leakage provided by this utility model.

[0024] Figure 4 This is a three-dimensional structural diagram of the first light-shielding tape in the backlight module for preventing light leakage provided by this utility model.

[0025] Figure 5 A cross-sectional structural diagram of the liquid crystal display module provided by this utility model. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments, examples of which are shown in the drawings. Throughout the drawings, the same or similar reference numerals denote 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 intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," "fixing," and "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Example 1

[0031] like Figure 1-3 As shown, a backlight module for preventing light leakage includes:

[0032] Backlight bracket 21, the backlight bracket 21 having an assembly groove 210;

[0033] The backlight strip 22 includes LED strip 221 and FPC strip 222. The LED strip 221 is disposed in the mounting groove 210. The FPC strip 222 has a first end 22a and a second end 22b. The first end 22a is located in the mounting groove 210 and connected to the LED strip 221. The second end 22b extends from above one side of the backlight bracket 21 to the outside of the backlight bracket 21.

[0034] The first light-shielding tape 23 is bonded and fixed to the top of the backlight bracket 21 and has a light outlet 230 corresponding to the assembly slot 210.

[0035] The second light-shielding tape 24 is bonded and fixed between the light strip FPC222 and the backlight bracket 21.

[0036] The backlight module of this utility model uses the second light-shielding tape 24 to bond and fix the light strip FPC222 to the backlight bracket 21. In this way, even if the first light-shielding tape 23 and the backlight bracket 21 become loose or fall off on the side near the backlight light strip 22 during long-term use, the second light-shielding tape 24 can still limit the relative position between the light strip FPC222 and the backlight bracket 21, so as to prevent the gap between the light strip FPC222 and the backlight bracket 21 from increasing, thereby avoiding the problem of light leakage through the gap.

[0037] In this embodiment, both the first light-shielding tape 23 and the second light-shielding tape 24 are black tapes, wherein the first light-shielding tape 23 is a double-sided adhesive tape and the second light-shielding tape 24 is a single-sided adhesive tape.

[0038] Specifically, the second light-shielding tape 24 includes a first adhesive portion 241, a second adhesive portion 242, and a third adhesive portion 243 connected in sequence. The first adhesive portion 241 is bonded and fixed below the second end 22b of the light strip FPC222. The second adhesive portion 242 is bent relative to the first adhesive portion 241 and bonded and fixed to the side of the backlight bracket 21 near the light strip FPC222. The third adhesive portion 243 is bent relative to the second adhesive portion 242 and bonded and fixed to the lower part of the backlight bracket 21 near the light strip FPC222.

[0039] In this embodiment, the first light-shielding tape 23 is bonded and fixed to the side of the light strip FPC222 near the first end 22a of the light strip FPC222.

[0040] Preferred, such as Figure 4 As shown, the first light-shielding tape 23 includes a first layer tape 231 and a second layer tape 232. The second layer tape 232 is bonded and fixed to the first layer tape 231 on the side (above or below) near the light strip FPC222. The light outlet 230 is opened in the first layer tape 231.

[0041] The first light-shielding tape 23 adopts a double-layer tape structure on the side near the light strip FPC222 to form a greater thickness, thereby improving its local light-shielding effect on that side and preventing light leakage caused by the light emitted by the light strip LED221.

[0042] The backlight module for preventing light leakage also includes a light guide assembly 25, which is disposed within the mounting groove 210, and the LED strip 221 is located on one side of the light guide assembly 25. The light guide assembly 25 includes a light guide plate 251, a reflective film 252, and an optical film 253. The reflective film 252 is disposed on the lower surface of the light guide plate 251, and the optical film 253 is disposed on the upper surface of the light guide plate 251.

[0043] In this embodiment, the optical film 253 includes a diffusion film, a lower brightness enhancement film, and an upper brightness enhancement film arranged sequentially.

[0044] Preferably, the backlight strip 22 further includes foam adhesive 223, which is bonded and fixed to the lower side of the first end 22a of the light strip FPC 222 and surrounds the periphery of the light strip LED 221; the first end 22a of the light strip FPC 222 is bonded and fixed to the backlight bracket 21 and the light guide assembly 25 above the side near it by the foam adhesive 223, so as to improve the bonding stability between the light strip FPC 222 and the backlight bracket 21 and the light guide assembly 25, and at the same time play a role in buffering and vibration reduction.

[0045] For the light guide assembly 25, the optical film 253 can be designed to be recessed on the side near the backlight strip 22, so that the side of the light guide plate 251 near the backlight strip 22 is exposed from the optical film 253; the light strip FPC 222 is bonded and fixed above the exposed side of the light guide plate 251 by the foam adhesive 223.

[0046] Example 2

[0047] like Figure 5 As shown, a liquid crystal display module includes a liquid crystal panel 1 and a backlight module 2 for preventing light leakage as described in Embodiment 1. The liquid crystal panel 1 is bonded and fixed to the first light-shielding tape 23 of the backlight module 2 for preventing light leakage.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present utility model, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the present utility model.

Claims

1. A backlight module with anti-light leakage feature, characterized in that, include: A backlight bracket, the backlight bracket having a mounting groove; A backlight strip, comprising LED strips and FPC strips, wherein the LED strips are disposed in the mounting groove, and the FPC strips have a first end and a second end, wherein the first end is located in the mounting groove and connected to the LED strips, and the second end extends from above one side of the backlight bracket to the outside of the backlight bracket; The first light-shielding tape is bonded and fixed to the top of the backlight bracket and has a light outlet corresponding to the assembly slot. The second light-shielding tape is bonded and fixed between the light strip FPC and the backlight bracket.

2. The backlight module for preventing light leakage according to claim 1, characterized in that, The second light-shielding tape includes a first adhesive portion and a second adhesive portion connected in sequence. The first adhesive portion is bonded and fixed to the lower part of the second end of the light strip FPC. After the second adhesive portion is bent relative to the first adhesive portion, it is bonded and fixed to the side of the backlight bracket near the light strip FPC.

3. The backlight module for preventing light leakage according to claim 2, characterized in that, The second light-shielding tape also includes a third adhesive portion connected to the second adhesive portion. After the third adhesive portion is bent relative to the second adhesive portion, it is bonded and fixed to the underside of the backlight bracket near the lamp strip FPC.

4. The backlight module for preventing light leakage according to claim 1, characterized in that, The first light-shielding tape is adhered and fixed to the top of the first end of the light strip FPC on the side closest to the light strip FPC.

5. The backlight module for preventing light leakage according to claim 1, characterized in that, The first light-shielding tape includes a first layer of tape and a second layer of tape, with the second layer of tape bonded and fixed to the side of the first layer of tape near the lamp strip FPC; the light outlet is formed in the first layer of tape.

6. The backlight module for preventing light leakage according to claim 1, characterized in that, The backlight module that prevents light leakage also includes a light guide component, which is disposed in the assembly slot, and the LED strip is located on one side of the light guide component.

7. The backlight module for preventing light leakage according to claim 6, characterized in that, The backlight strip also includes foam adhesive, which is bonded and fixed to the lower side of the first end of the light strip FPC and surrounds the periphery of the light strip LED; the first end of the light strip FPC is bonded and fixed to the backlight bracket and the light guide assembly above the side near it by the foam adhesive.

8. The backlight module for preventing light leakage according to claim 1, characterized in that, The first light-shielding tape is a double-sided adhesive tape, and the second light-shielding tape is a single-sided adhesive tape.

9. The backlight module for preventing light leakage according to claim 1, characterized in that, Both the first and second light-blocking tapes are black tapes.

10. A liquid crystal display module, characterized in that, It includes a liquid crystal panel and the backlight module for preventing light leakage as described in claim 1, wherein the liquid crystal panel is bonded and fixed to the first light-shielding tape of the backlight module for preventing light leakage.

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