Backlight module and liquid crystal display device

Abstract

The utility model relates to the technical field of backlight modules, in particular to a backlight module and a liquid crystal display device. The backlight module is provided with a plurality of Mini LED lamps, each Mini LED lamp is connected with a control IC, and the control ICs are used for controlling the illumination intensity of the corresponding Mini LED lamps, so that the illumination uniformity of the backlight module is not smaller than 60% after the backlight module is attached to a display panel. According to the backlight module, the black state uniformity of the assembled liquid crystal display device can be improved conveniently.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of backlight modules, in particular to a backlight module and a liquid crystal display device. BACKGROUND

[0002] The backlight module is a key component of a display module, and its main function is to provide uniform and stable backlight illumination for a liquid crystal display screen to ensure that the screen can clearly display content under various lighting conditions. The liquid crystal panel of the backlight module itself does not emit light, so it needs to be attached to the backlight module. The light source (such as an LED or a fluorescent lamp) in the backlight module transmits through the liquid crystal panel to generate a visible image. The backlight module is usually composed of a backlight source, a light guide plate, a reflective sheet, an optical film, and a plastic frame.

[0003] In the prior art, after the backlight module is attached to the liquid crystal panel, the entire backlight module may be subjected to uneven attachment stress, resulting in light leakage of the attached backlight module, and thus the black state uniformity of the entire backlight module is not high. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problems existing in the prior art, the purpose of the present application is to provide a backlight module to improve the black state uniformity of the attached liquid crystal display device.

[0005] To achieve the above-mentioned purpose, the present application provides a backlight module, which is configured with a plurality of Mini LED lamps, each of which is connected with a control IC. The control IC is used to control the light intensity of the corresponding Mini LED lamp, so that the light uniformity of the backlight module after being attached to the display panel is not less than 60%.

[0006] As a further optimization of the backlight module provided by the present application, each of the Mini LED lamps and each of the control ICs is arranged on a PCB.

[0007] As a further optimization of the backlight module provided by the present application, the PCB is arranged in the backlight frame of the backlight module by double-sided adhesive.

[0008] As a further optimization of the backlight module provided by the present application, a reflective film is arranged on the PCB.

[0009] As a further optimization of the backlight module provided by the present application, a light guide plate is arranged in the backlight frame.

[0010] As a further optimization of the backlight module provided by the present application, a diffusion plate is arranged on the light guide plate.

[0011] As a further optimization mode of the backlight module provided by the utility model, the diffusion sheet is arranged on the diffusion plate.

[0012] As a further optimization mode of the backlight module provided by the utility model, the lower light enhancement film and the upper light enhancement film are sequentially arranged on the diffusion sheet.

[0013] As a further optimization mode of the backlight module provided by the utility model, the sponge is further arranged on the backlight frame.

[0014] To achieve the above object, the application further provides a liquid crystal display device comprising the backlight module.

[0015] The backlight module has the following beneficial effects:

[0016] The backlight module uses the Mini LED lamp to replace the backlight source in the traditional backlight module, and then the light intensity of different Mini LED lamps can be controlled through the corresponding control IC of the Mini LED lamp, thereby ensuring the black state uniformity after the backlight module is attached.

[0017] Other features and advantages of the application will be described in the following description, and some will become apparent from the description, or will be understood by those skilled in the art from the description, or will be understood by those skilled in the art from the description. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are intended to provide a further understanding of the application, and constitute a part of the specification, and together with the embodiments of the application, serve to explain the application, and do not constitute a limitation on the application. In the drawings:

[0019] Figure 1 The structure of the backlight module of the embodiment 1 of the application is shown in the figure;

[0020] In the figure: 1-backlight frame, 2-diffusion plate, 3-double-sided adhesive, 4-PCB board, 5-sponge, 6-upper light enhancement film, 7-lower light enhancement film, 8-diffusion sheet, 9-reflective film, 10-Mini LED lamp, 11-light guide plate. DETAILED DESCRIPTION

[0021] The embodiments of the application will be described in more detail below with reference to the accompanying drawings. Although some embodiments of the application are shown in the drawings, it should be understood that the application can be implemented in various forms, and should not be interpreted as being limited to the embodiments described herein, on the contrary, these embodiments are provided to more thoroughly and completely understand the application. It should be understood that the drawings and embodiments of the application are only for illustrative purposes, and are not intended to limit the scope of protection of the application.

[0022] It should be understood that the various steps recited in the method embodiments of the present application can be performed in different orders and / or in parallel. In addition, the method embodiments can include additional steps and / or omit performing the steps shown. The scope of the present application is not limited in this respect.

[0023] The term "comprising" and variations thereof as used herein are open-ended, that is, "including but not limited to". The term "based on" means "based, at least in part, on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Related terms shall be construed accordingly.

[0024] It should be noted that the modification of "a" or "an" herein is used as the singular form and the plural form, and those skilled in the art should understand that, unless otherwise explicitly stated in the context, it should be understood as "one or more". "Multiple" should be understood as two or more.

[0025] In the following, embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0026] Embodiment 1

[0027] In one embodiment of the present application, a backlight module is provided, which will be described below with reference to Figure 1 The backlight module of the present application is described in detail as follows. Figure 1 As shown in FIG. 1, the backlight module of Embodiment 1 of the present application is configured with a plurality of Mini LED lamps 10, each of which is connected with a control IC, which is used to control the light intensity of the corresponding Mini LED lamp 10, so that the light uniformity of the backlight module after being attached to a display panel is not less than 60%.

[0028] In the present embodiment, each of the Mini LED lamps 10 and each of the control ICs is disposed on a PCB 4.

[0029] In the present embodiment, the PCB 4 is disposed in the backlight frame 1 of the backlight module by means of a double-sided adhesive 3.

[0030] In some other embodiments, the PCB 4 can also be fixed in the backlight frame by mechanical fixation.

[0031] It should be noted that the black state uniformity refers to the ratio of the lowest luminance value to the highest luminance value in the display area of the liquid crystal display device.

[0032] In the present embodiment, a light guide plate 11 is disposed in the backlight frame 1.

[0033] In the embodiment, the reflective film 9 is arranged on the PCB 4 to make the light emitted by the Mini LED lamps propagate in the direction of the light guide plate 11.

[0034] In the embodiment, the diffusion plate 2 is arranged on the light guide plate 11.

[0035] In the embodiment, the diffusion sheet 8 is arranged on the diffusion plate 2.

[0036] In the embodiment, the lower light enhancement film 7 and the upper light enhancement film 6 are sequentially arranged on the diffusion sheet 8.

[0037] In the embodiment, the backlight frame 1 further comprises a sponge for buffering the backlight module and the display panel.

[0038] In the embodiment, the backlight module can be attached to any one of a TFT display panel, a TN display panel and an IPS display panel.

[0039] The working principle of the embodiment of the application is as follows:

[0040] After the backlight module and the display panel are attached, the attached liquid crystal display device is tested for black state uniformity. If it is found that some areas of the liquid crystal display device have light leakage or uneven display brightness, the light intensity of the corresponding Mini LED lamp is adjusted by the control IC, thereby improving the black state uniformity of the entire module.

[0041] For example, if it is found that the liquid crystal display device has light leakage, the light intensity of the Mini LED lamp in the area with light leakage is adjusted to be lower by the control IC when the display panel is not powered on and the backlight module is powered on,

[0042] Embodiment 2

[0043] In an embodiment of the application, a liquid crystal display device is provided, which comprises the backlight module as described above.

[0044] The above description is only some embodiments of the application and a description of the technical principles used. Those skilled in the art should understand that the disclosure range involved in the application is not limited to the technical solutions formed by the specific combinations of the technical features described above, and should also cover other technical solutions formed by any combination of the technical features described above or their equivalent features without departing from the above disclosure concept. For example, the technical solutions formed by replacing the above features with the technical features disclosed in the application (but not limited to) having similar functions.

[0045] Furthermore, while the operations are described in a specific order, this should not be construed as requiring these operations to be performed in the specific order shown or in sequential order. Multitasking and parallel processing may be advantageous in certain environments. Similarly, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of this application. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments.

[0046] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. A backlight module, characterized in that, The backlight module is configured with a plurality of Mini LED lamps, each of the Mini LED lamps is connected with a control IC, the control IC is used for controlling the light intensity of the corresponding Mini LED lamp, so that the light uniformity of the backlight module after being attached to the display panel is not less than 60%.

2. The backlight module of claim 1, wherein, Each of the Mini LED lamps and each of the control ICs is arranged on a PCB.

3. The backlight module of claim 2, wherein, The PCB is arranged in the backlight frame of the backlight module through double-sided adhesive.

4. The backlight module of claim 3, wherein, The PCB is provided with a reflective film.

5. The backlight module of claim 4, wherein, The backlight frame is further provided with a light guide plate.

6. The backlight module of claim 5, wherein, The light guide plate is provided with a diffusion plate.

7. The backlight module of claim 6, wherein, The diffusion plate is provided with a diffusion sheet.

8. The backlight module of claim 7, wherein, The diffusion sheet is sequentially provided with a lower light enhancement film and an upper light enhancement film.

9. The backlight module of claim 8, wherein, The backlight frame is further provided with a sponge.

10. A liquid crystal display device, characterized by comprising: The backlight module of any one of claims 1-9.

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