Backlight module and display device

Abstract

The application provides a backlight module, which comprises a backboard, the backboard comprising a backboard body and a side plate assembly, the side plate assembly and the backboard body enclosing a containing space. The backlight module further comprises a first light emitting assembly and a second light emitting assembly, both of which are located in the containing space, and the first light emitting assembly is arranged on the backboard body, and the second light emitting assembly is arranged on the side of the side plate assembly facing the containing space. When the first light emitting assembly emits light, the second light emitting assembly selectively emits light or does not emit light according to the intensity of ambient light. When the display device is used in an outdoor environment, both the first light emitting assembly and the second light emitting assembly emit light, the light emitting intensity of the backlight module is increased, the needs of the display device used in the outdoor environment are met, the display picture of the display device is prevented from being unclear due to strong outdoor light, and the adaptability of the display device to different ambient light intensities is improved. The application further provides a display device with the backlight module.

Description

TECHNICAL FIELD

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

[0002] In recent years, the application of liquid crystal display is more and more extensive, and the liquid crystal display is not limited to indoor use, and the demand for outdoor use is also increasing. In order to protect the eyes of the user and improve the viewing comfort, the maximum brightness of the general liquid crystal display is limited.

[0003] At present, the brightness of the common liquid crystal display can meet the demand for indoor use, but when used outdoors, the influence of outdoor strong light will cause the picture displayed by the liquid crystal display to be unclear.

[0004] Therefore, how to solve the problem of unclear picture displayed by the liquid crystal display caused by outdoor strong light in the prior art is a problem to be solved by the person skilled in the art. SUMMARY

[0005] In view of the above problems in the prior art, the purpose of the present application is to provide a backlight module and a display device with the backlight module, which aims to solve the problem of unclear picture displayed by the liquid crystal display caused by outdoor strong light in the prior art.

[0006] To solve the above technical problems, the present application provides a backlight module, which comprises a back plate, the back plate comprises a back plate main body and a side plate assembly, the side plate assembly is connected to the periphery of the back plate main body and surrounds the accommodation space with the back plate main body. The backlight module further comprises a first light emitting assembly and a second light emitting assembly, the first light emitting assembly and the second light emitting assembly are located in the accommodation space, and the first light emitting assembly is arranged on the back plate main body, and the second light emitting assembly is arranged on the side of the side plate assembly facing the accommodation space, wherein when the first light emitting assembly emits light, the second light emitting assembly selectively emits light or does not emit light according to the intensity of the ambient light.

[0007] In summary, the backlight module provided by the embodiment of the present application comprises a first light-emitting assembly and a second light-emitting assembly. When the display device is used in an indoor environment, the first light-emitting assembly emits light, the second light-emitting assembly does not emit light, and the light-emitting intensity of the backlight module can meet the requirements of the display device used in an indoor environment; when the display device is used in an outdoor environment, the first light-emitting assembly and the second light-emitting assembly both emit light, the light-emitting intensity of the backlight module is increased, and the requirements of the display device used in an outdoor environment are met, thereby avoiding the fact that the display device displays an unclear picture caused by strong outdoor light, improving the adaptability of the display device to different ambient light intensities, and enabling the display device to clearly display a picture in both indoor and outdoor environments.

[0008] In an example embodiment, the first light-emitting assembly comprises a first driving board and a plurality of first light-emitting units. The first driving board is arranged on the side of the back plate body facing the accommodating space. The plurality of first light-emitting units are arranged on the side of the first driving board facing away from the back plate body and are electrically connected to the first driving board. The first driving board is configured to drive the plurality of first light-emitting units to emit light. The second light-emitting assembly comprises a second driving board and a plurality of second light-emitting units. The second driving board is arranged in the accommodating space and is connected to the side of the side plate assembly facing the accommodating space. The plurality of second light-emitting units are arranged on the side of the second driving board facing away from the side plate assembly and are electrically connected to the second driving board. The second driving board is configured to drive the plurality of second light-emitting units to emit light.

[0009] In an example embodiment, the backlight module further comprises a diffusion plate assembly. The diffusion plate assembly comprises a diffusion plate. The diffusion plate is arranged on the side of the first light-emitting unit facing away from the first driving board and on the side of the second light-emitting unit facing away from the second driving board. The diffusion plate is configured to homogenize the light emitted by the plurality of first light-emitting units.

[0010] In an example embodiment, the side of the diffusion plate facing the plurality of second light-emitting units is provided with a groove. The bottom wall of the groove is provided with a plurality of mounting holes. The plurality of mounting holes extend away from the side of the diffusion plate facing the plurality of second light-emitting units. The diffusion plate assembly further comprises a plurality of light guide elements. The light guide elements are accommodated in the mounting holes. The light guide elements are configured to guide the light emitted by the second light-emitting units towards the diffusion plate.

[0011] In an example embodiment, the diameter of the light guide element is 1 mm to 2 mm.

[0012] In an example embodiment, the distance between two adjacent light guide elements is 5 mm to 10 mm.

[0013] In an exemplary embodiment, the diffusion plate assembly further comprises a light shielding layer, the light shielding layer is arranged on the bottom wall of the groove, and the opening of the mounting hole exposes the light shielding layer, the light shielding layer is used for shielding light.

[0014] In an exemplary embodiment, the diffusion plate assembly further comprises an encapsulation layer, the encapsulation layer is filled in the groove to fix the plurality of light guide elements to the diffusion plate.

[0015] In an exemplary embodiment, the backlight module further comprises a detection module and a control module, the control module is electrically connected with the detection module and the second light emitting assembly respectively, the detection module is used for detecting the ambient light intensity to obtain a brightness signal, and sending the brightness signal to the control module, the control module controls the second light emitting assembly to emit light or not to emit light according to the brightness signal.

[0016] Based on the same inventive concept, the embodiments of the present application also provide a display device, the display device comprises a display panel and the above-mentioned backlight module, the display panel is arranged on the light emitting side of the backlight module.

[0017] In summary, the display device provided by the embodiments of the present application comprises a display panel and a backlight module, the backlight module comprises a first light emitting assembly and a second light emitting assembly. When the display device is used in an indoor environment, the first light emitting assembly emits light, the second light emitting assembly does not emit light, and the light emitting intensity of the backlight module can meet the needs of the display device used in an indoor environment; when the display device is used in an outdoor environment, the first light emitting assembly and the second light emitting assembly both emit light, the light emitting intensity of the backlight module increases, meeting the needs of the display device used in an outdoor environment, avoiding the display device displaying a picture that is not clear due to strong outdoor light, improving the adaptability of the display device to different ambient light intensities, and enabling the display device to clearly display a picture in both indoor and outdoor environments. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described in the following are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 Part of the layer structure schematic diagram of the display device disclosed by the first embodiment of the present application;

[0020] Figure 2 The three-dimensional assembly schematic diagram of the backlight module disclosed by the second embodiment of the present application;

[0021] Figure 3 A schematic diagram of a part of the layer structure of the backlight module according to the second embodiment of the present application is shown in Figure 2;

[0022] Figure 4 A schematic diagram of the diffusion plate of the backlight module according to the second embodiment of the present application is shown in Figure 3; Figure 3

[0023] Figure 5 Figure 4

[0024] Figure 6 Figure 4

[0025] Figure 7 Figure 3

[0026] Figure 8 Figure 7

[0027] Figure 9 Figure 3

[0028] Figure 10 Figure 3

[0029] Figure 11 Figure 3

[0030] Figure 12 Figure 3

[0031] Figure 13 Figure 11

[0032] BRIEF DESCRIPTION OF THE DRAWINGS

[0033] ​​​​​​​​​​​​​​​​​​​10 - display panel; 30 - backlight module; 31 - back plate; 33 - first light emitting component; 34 - second light emitting component; 35 - diffusion plate component; 36 - support column; 37 - optical film component; 38 - frame component; 39 - support element; 41 - detection module; 42 - control module; 100 - display device; 301 - accommodating space; 311 - back plate body; 312 - side plate component; 331 - first driving plate; 333 - first light emitting unit; 341 - second driving plate; 343 - second light emitting unit; 351 - diffusion plate; 351a - groove; 351b - mounting hole; 355 - light guide element; 356 - light shielding layer; 357 - encapsulation layer; 381 - first frame; 382 - second frame; 383 - first limiting member; 384 - second limiting member. DETAILED DESCRIPTION

[0034] For the purpose of promoting an understanding of the application, the application will now be described in greater detail with reference to the figures. The preferred embodiments of the application are illustrated in the figures. However, the application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art.

[0035] The following description of several embodiments with reference to the additional drawings is used to illustrate specific embodiments in which the application can be implemented. The serial numbers of the components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). The direction terms mentioned in this application, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side" and the like, are only the direction of the additional drawings, therefore, the direction terms used are for better, clearer description and understanding of the application, and are not indicative or implied that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0036] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrally connected, can be mechanically connected, can be directly connected, or indirectly connected through an intermediate medium, or can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the accompanying drawings are used to distinguish different objects, and are not used to describe a specific order. In addition, the terms "include", "may include", "contain" or "may contain" used in the present application represent the existence of the corresponding functions, operations, elements, etc. disclosed, and do not limit other one or more functions, operations, elements, etc. In addition, the terms "include" or "contain" mean that the corresponding features, numbers, steps, operations, elements, components or combinations thereof disclosed in the specification exist, and do not exclude the existence or addition of one or more other features, numbers, steps, operations, elements, components or combinations thereof, and are intended to cover non-exclusive inclusion. It should also be understood that the meaning of "at least one" described herein is one and more, for example, one, two or three, and the meaning of "multiple" is at least two, for example, two or three, unless otherwise explicitly specified.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the specification of the present application is only for the purpose of describing specific embodiments and is not intended to limit the present application.

[0038] Please refer to Figure 1 , Figure 1 A schematic diagram of a partial layer structure of a display device disclosed in the first embodiment of the present application. In the embodiments of the present application, the display device 100 can include a display panel 10 and a backlight module 30 arranged in a stack, the display panel 10 is arranged on the light exit side of the backlight module 30, and the display panel 10 is used to display images under the backlight provided by the backlight module 30.

[0039] In the embodiments of the present application, the display panel 10 can be a twisted nematic (TN) display panel, a vertical alignment (VA) display panel, an in-plane switching (IPS) display panel or a fringe field switching (FFS) display panel, and the present application does not make specific limitations thereto.

[0040] In an exemplary embodiment, the display panel 10 comprises a color film substrate, a liquid crystal layer and an array substrate which are sequentially stacked, i.e. the liquid crystal layer is between the color film substrate and the array substrate, the color film substrate and the array substrate form a corresponding preset electric field according to an image signal, the preset electric field drives the liquid crystal molecules in the liquid crystal layer to deflect to change the transmittance of the liquid crystal layer, so that the display panel 10 displays different gray scale brightness.

[0041] In an exemplary embodiment, the display panel 10 further comprises an upper polarizer and a lower polarizer, the upper polarizer is arranged on the side of the color film substrate away from the array substrate, and the lower polarizer is arranged on the side of the array substrate away from the color film substrate, the upper polarizer and the lower polarizer are used to convert the natural light backlight into polarized light backlight. The backlight provided by the backlight module 30 sequentially transmits through the lower polarizer, the array substrate, the liquid crystal layer, the color film substrate and the upper polarizer.

[0042] It can be understood that the display device 100 can be used in electronic devices including but not limited to televisions, tablets, notebooks, desktop computers, mobile phones, vehicle-mounted displays, etc. According to the embodiments of the present application, the specific type of the display device 100 is not particularly limited, and those skilled in the art can design accordingly according to the specific use requirements of the display device 100, which will not be described here.

[0043] In an exemplary embodiment, the display device 100 can further include a drive board, a power board, a high-voltage board, a key control board and other necessary components and parts, and those skilled in the art can supplement accordingly according to the specific type and actual function of the display device 100, which will not be described here.

[0044] Please refer to Figure 2 With Figure 3 , Figure 2 the backlight module disclosed in the second embodiment of the present application, Figure 3FIG. 2 is a schematic diagram of a partial layer structure of a backlight module according to a second embodiment of the present application. The backlight module 30 includes a back plate 31, the back plate 31 includes a back plate body 311 and a side plate assembly 312, the back plate body 311 is opposite to and spaced apart from the display panel 10, the side plate assembly 312 is connected to the periphery of the back plate body 311 and is located on the side of the back plate body 311 facing the display panel 10, and the back plate body 311 and the side plate assembly 312 enclose a containing space 301. The backlight module 30 further includes a first light emitting assembly 33 and a second light emitting assembly 34, the first light emitting assembly 33 and the second light emitting assembly 34 are both located in the containing space 301, the first light emitting assembly 33 is arranged on the back plate body 311, and the second light emitting assembly 34 is arranged on the side of the side plate assembly 312 facing the containing space 301. When the first light emitting assembly 33 emits light, the second light emitting assembly 34 selectively emits light or does not emit light according to the ambient light intensity.

[0045] It can be understood that the backlight module 30 includes two independent light emitting assemblies, i.e., the first light emitting assembly 33 and the second light emitting assembly 34. When the display device 100 is used in an indoor environment, at this time the ambient light intensity is weak, the first light emitting assembly 33 emits light, and the second light emitting assembly 34 does not emit light, so that the light emitting intensity of the backlight module 30 can meet the needs of the display device 100 used indoors. When the display device 100 is used in an outdoor environment, at this time the ambient light intensity is strong, the first light emitting assembly 33 and the second light emitting assembly 34 both emit light, so that the light emitting intensity of the backlight module 30 is increased to meet the needs of the display device 100 used outdoors, avoid the display device 100 displaying a picture that is not clear due to strong outdoor light, and improve the adaptability of the display device 100 to different ambient light intensities, so that the display device 100 can clearly display a picture indoors and outdoors.

[0046] In an exemplary embodiment, the first light emitting assembly 33 and the second light emitting assembly 34 are independently controlled, i.e., the light emitting state of the first light emitting assembly 33 and the light emitting state of the second light emitting assembly 34 do not affect each other. In addition, the first light emitting assembly 33 is arranged on the back plate body 311 to form a back light-in system, and the second light emitting assembly 34 is arranged on the side of the side plate assembly 312 facing the containing space 301 to form a side light-in system; when the display device 100 is used in an indoor environment, the back light-in system is turned on alone, and when the display device 100 is used in an outdoor environment, the back light-in system and the side light-in system are both turned on.

[0047] In an example embodiment, the back plate body 311 can be a rectangular plate structure as a whole, and the side plate assembly 312 can be a hollow frame structure having four side plates connected in sequence and arranged at the periphery of the back plate body 311 respectively to enclose the accommodating space 301.

[0048] In an example embodiment, the back plate body 311 and the side plate assembly 312 can be integrally formed.

[0049] In summary, the backlight module 30 provided by the example embodiment includes a first light emitting assembly 33 and a second light emitting assembly 34, and the first light emitting assembly 33 and the second light emitting assembly 34 constitute independent light-in systems respectively. When the display device 100 is used in an indoor environment, the first light emitting assembly 33 emits light, and the second light emitting assembly 34 does not emit light, and the light emitting intensity of the backlight module 30 can meet the needs of the display device 100 used indoors. When the display device 100 is used in an outdoor environment, the first light emitting assembly 33 and the second light emitting assembly 34 both emit light, and the light emitting intensity of the backlight module 30 is increased to meet the needs of the display device 100 used outdoors, thereby avoiding the display device 100 displaying unclear pictures caused by strong outdoor light, improving the adaptability of the display device 100 to different ambient light intensities, and enabling the display device 100 to clearly display pictures indoors and outdoors. In addition, when the first light emitting assembly 33 emits light, the second light emitting assembly 34 selectively emits light or does not emit light according to the ambient light intensity, so that the backlight module 30 can provide corresponding light emitting intensity according to the ambient light intensity to meet the specific needs of the display device 100 used indoors or outdoors, thereby expanding the use scenarios of the display device 100.

[0050] In the example embodiment, please refer to Figure 3 The first light emitting assembly 33 includes a first driving plate 331 and a plurality of first light emitting units 333. The first driving plate 331 is arranged in the accommodating space 301 and located at one side of the back plate body 311 where the side plate assembly 312 is arranged, i.e., the first driving plate 331 is arranged at the side of the back plate body 311 facing the accommodating space 301. The plurality of first light emitting units 333 are arranged at the side of the first driving plate 331 opposite to the back plate body 311 and electrically connected with the first driving plate 331. The first driving plate 331 is used to drive the plurality of first light emitting units 333 to emit light.

[0051] It can be understood that the first light emitting assembly 33 is a direct type backlight source, and the first light emitting assembly 33 can be a lamp panel.

[0052] In the embodiment of the present application, the first driving board 331 is provided with a corresponding driving circuit, which is electrically connected with the plurality of first light emitting units 333 and provides corresponding working current to the plurality of first light emitting units 333 to drive the plurality of first light emitting units 333 to emit light.

[0053] In the exemplary embodiment, the first light emitting assembly 33 can realize global dimming and local dimming, including 1D local dimming and 2D local dimming. The global dimming refers to adjusting the luminance of the first light emitting assembly 33 as a whole. The 1D local dimming refers to that the first light emitting assembly 33 has a plurality of light emitting columns arranged side by side, and the luminance of each light emitting column can be adjusted individually. The 2D local dimming refers to that the first light emitting assembly 33 has a plurality of light emitting areas arranged in an array, and the luminance of each light emitting area can be adjusted individually.

[0054] In the exemplary embodiment, the plurality of first light emitting units 333 can be arranged in an array on the first driving board 331, i.e., the plurality of first light emitting units 333 are arranged in multiple rows and multiple columns. The light emitting unit 333 can be a light emitting diode (LED) or a mini light emitting diode (Mini LED), which is not specifically limited in the present application. The light emitted by the first light emitting unit 333 can be white light.

[0055] In the exemplary embodiment, the first driving board 331 and the back plate body 311 can be bonded by double-sided adhesive.

[0056] In the embodiment of the present application, please refer to Figure 3 The second light emitting assembly 34 includes a second driving board 341 and a plurality of second light emitting units 343. The second driving board 341 is arranged in the accommodation space 301 and connected to one side of the side plate assembly 312 facing the accommodation space 301, and the plurality of second light emitting units 343 are arranged on the side of the second driving board 341 opposite to the side plate assembly 312 and electrically connected with the second driving board 341. The second driving board 341 is used to drive the plurality of second light emitting units 343 to emit light.

[0057] It can be understood that the second light emitting assembly 34 is a side light type backlight, and the second light emitting assembly 34 can be a light bar.

[0058] In this embodiment of the application, the second driving board 341 is provided with a corresponding driving circuit. The driving circuit is electrically connected to a plurality of second light-emitting units 343 and provides a corresponding operating current to the plurality of second light-emitting units 343 to drive the plurality of second light-emitting units 343 to emit light.

[0059] In an exemplary embodiment, a plurality of the second light-emitting units 343 may be arranged side by side on the second driving board 341, that is, the plurality of the second light-emitting units 343 are distributed in a single row. The second light-emitting unit 343 may be a light-emitting diode (LED), and the light emitted by the second light-emitting unit 343 may be white light.

[0060] like Figure 2 As shown, in an exemplary embodiment, the second drive plate 341 and the side plate assembly 312 can be bonded together with double-sided adhesive.

[0061] In the embodiments of this application, please refer to Figure 2 and Figure 3 The backlight module 30 further includes a diffuser plate assembly 35, which includes a diffuser plate 351. The diffuser plate 351 is disposed within the accommodating space 301 and is located on the side of the first light-emitting unit 333 facing away from the first driving plate 331 and the side of the second light-emitting unit 343 facing away from the second driving plate 341, and is spaced apart from both the first light-emitting unit 333 and the second light-emitting unit 343.

[0062] In an exemplary embodiment, the diffuser plate 351 may have an overall rectangular plate structure. The diffuser plate 351 is used to homogenize the light emitted by the plurality of first light-emitting units 333, making the backlight provided by the backlight module 30 to the display panel 10 more uniform. The orthographic projection of the plurality of first light-emitting units 333 on the back panel body 311 is located within the orthographic projection of the diffuser plate 351 on the back panel body 311. That is, the area where the plurality of first light-emitting units 333 are located is covered by the diffuser plate 351, and the periphery of the area where the plurality of first light-emitting units 333 are located is also covered by the diffuser plate 351, so that the light emitted by the plurality of first light-emitting units 333 can pass through the diffuser plate 351.

[0063] In an exemplary embodiment, the orthographic projection of the plurality of second light-emitting units 343 on the second driving plate 341 is located within the orthographic projection of the diffuser plate 351 on the second driving plate 341.

[0064] In an exemplary embodiment, the material of the diffuser plate 351 may include resin.

[0065] Please refer to the embodiments described in this application as well. Figure 3 , Figure 4 , Figure 5 and Figure 6 , Figure 4 for Figure 3 A schematic diagram of the diffuser plate of the backlight module shown. Figure 5 for Figure 4 An enlarged schematic diagram of structure V in the diffuser plate shown. Figure 6 for Figure 4 The diagram shows the layer structure of the diffuser plate. A groove 351a is formed on one side of the diffuser plate 351 facing the plurality of second light-emitting units 343. A plurality of mounting holes 351b are formed on the bottom wall of the groove 351a. The mounting holes 351b extend towards the side of the diffuser plate 351 away from the plurality of second light-emitting units 343, meaning the mounting holes 351b are formed by the bottom wall of the groove 351a extending recessed into the interior of the diffuser plate 351.

[0066] In an exemplary implementation, please refer to Figure 5 The shape of the plane corresponding to the opening of the groove 351a can be rectangular, that is, the groove 351a is a rectangular groove. The radial section of the mounting hole 351b can be circular, that is, the mounting hole 351b is a circular hole.

[0067] Please refer to the embodiments described in this application as well. Figure 3 , Figure 7 and Figure 8 , Figure 7 for Figure 3 The diagram shows a three-dimensional assembly of the second light-emitting component and the diffuser plate component. Figure 8 for Figure 7 The diagram shows an enlarged view of structure VIII in the diffuser assembly. The diffuser assembly 35 also includes a plurality of light guide elements 355, which are housed within the mounting hole 351b and are used to guide the light emitted by the second light-emitting unit 343 to the diffuser 351.

[0068] It is understood that multiple second light-emitting units 343 are disposed on one side plate of the side plate assembly 312, and the light guide element 355 is used to uniformly guide the light emitted by the second light-emitting units 343 to the diffuser plate 351 to avoid uneven backlighting provided by the backlight module 30.

[0069] In an exemplary embodiment, the light guide element 355 may be an optical fiber.

[0070] In the exemplary implementation, please refer to the following: Figure 9 and Figure 10 , Figure 9 for Figure 3A front view structural schematic diagram of the light guide element and the second light emitting unit, Figure 10 To Figure 3 A side view structural schematic diagram of the light guide element and the second light emitting unit. A plurality of the mounting holes 351b are arranged in a single row on the bottom wall of the groove 351a, and the arrangement direction of the plurality of the mounting holes 351b on the bottom wall of the groove 351a is the same as the arrangement direction of the plurality of the second light emitting units 343 on the second driving board 341. Correspondingly, a plurality of the light guide elements 355 are arranged in a single row, and the arrangement direction of the plurality of the light guide elements 355 is the same as the arrangement direction of the plurality of the second light emitting units 343 on the second driving board 341. The positions of the plurality of the light guide elements 355 correspond to the positions of the plurality of the second light emitting units 343 one by one, that is, the orthographic projection of the light guide element 355 on the second driving board 341 coincides or partially coincides with the orthographic projection of the second light emitting unit 343 on the second driving board 341, that is, the orthographic projection of the light guide element 355 on the second driving board 341 at least partially coincides with the orthographic projection of the second light emitting unit 343 on the second driving board 341.

[0071] In an exemplary embodiment, part of the light guide elements 355 can extend out of the opening of the mounting hole 351b and be located in the groove 351a.

[0072] In an exemplary embodiment, referring to Figure 6 , the mounting hole 351b should be recessed and extended towards the side of the diffusion plate 351 facing away from the second light emitting unit 343, but not penetrate through the diffusion plate 351. Correspondingly, the light guide element 355 is close to the side of the diffusion plate 351 facing away from the second light emitting unit 343, but does not extend out of the side of the diffusion plate 351 facing away from the second light emitting unit 343.

[0073] It can be understood that the light guide element 355 close to the side of the diffusion plate 351 facing away from the second light emitting unit 343 allows the light emitted by the second light emitting unit 343 to pass through the light guide element 355, thereby covering the entire diffusion plate 351. The light guide element 355 does not extend out of the side of the diffusion plate 351 facing away from the second light emitting unit 343, avoiding the light emitted by the second light emitting unit 343 from exposing the diffusion plate 351, resulting in a bright edge of the backlight module 30.

[0074] In an example embodiment, the diameter of the light guide element 355 can be 1 mm to 2 mm, for example, 1 mm, 1.1 mm, 1.4 mm, 1.5 mm, 1.7 mm, 1.9 mm, 2 mm, or other values, which are not specifically limited in the present application. The length of the light guide element 355 is 2 mm to 3 mm less than the distance between the side of the diffusion plate 351 facing the second light emitting unit 343 and the side facing away from the second light emitting unit 343, that is, the length of the light guide element 355 is 2 mm to 3 mm less than the length of the diffusion plate 351, for example, 2 mm, 2.2 mm, 2.3 mm, 2.5 mm, 2.7 mm, 3 mm, or other values, which are not specifically limited in the present application.

[0075] In an example embodiment, the distance between two adjacent light guide elements 355 can be 5 mm to 10 mm, for example, 5 mm, 5.5 mm, 6 mm, 6.8 mm, 7.5 mm, 8 mm, 9 mm, 10 mm, or other values, which are not specifically limited in the present application. It can be understood that if the distance between two adjacent light guide elements 355 is less than 5 mm, the number of light guide elements 355 will increase, which is not conducive to reducing costs; if the distance between two adjacent light guide elements 355 is greater than 10 mm, a bright band will appear on the backlight module 30, which will result in poor backlight uniformity.

[0076] In the embodiments of the present application, please refer to Figure 11 , Figure 11 for Figure 3 the side view structure diagram of the diffusion plate. The diffusion plate assembly 35 further comprises a light shielding layer 356, which is arranged on the bottom wall of the groove 351a, and the opening of the mounting hole 351b exposes the light shielding layer 356, that is, the light shielding layer 356 does not cover the mounting hole 351b. Correspondingly, the light guide element 355 exposes the light shielding layer 356, that is, the light shielding layer 356 does not cover the light guide element 355. The light shielding layer 356 is used for light shielding to avoid light leakage in the diffusion plate 351.

[0077] In an example embodiment, the light shielding layer 356 can be black ink.

[0078] In the embodiments of the present application, please refer to Figure 3 , Figure 12 and Figure 13 , Figure 12 for Figure 3 the structure diagram of the diffusion plate assembly, Figure 13 for Figure 11An enlarged schematic view of structure XIII in the diffusion assembly shown. The diffusion plate assembly 35 further comprises an encapsulation layer 357 filled in the recess 351a to fix the plurality of light guide elements 355 to the diffusion plate 351.

[0079] In an exemplary embodiment, the encapsulation layer 357 can be optical glue with good transparency.

[0080] In the embodiments of the present application, referring to Figure 3 , the backlight module 30 further comprises a plurality of supports 36 disposed between the first driving plate 331 and the diffusion plate 351, and the height of the supports 36 on the first driving plate 331 is greater than the height of the first light emitting units 333 on the first driving plate 331, for supporting between the first driving plate 331 and the diffusion plate 351, avoiding the diffusion plate 351 contacting the plurality of first light emitting units 333, thereby affecting the heat dissipation of the plurality of first light emitting units 333, preventing the heat emitted by the plurality of first light emitting units 333 from damaging the diffusion plate 351.

[0081] In the embodiments of the present application, referring to Figure 2 and Figure 3 , the backlight module 30 further comprises an optical film assembly 37 disposed on the side of the diffusion plate 351 opposite to the first light emitting assembly 33, the optical film assembly 37 for brightening the backlight and making the backlight more uniform.

[0082] In an exemplary embodiment, the optical film assembly 37 can include at least one prism sheet and at least one diffusion sheet stacked, the prism sheet for brightening the backlight, and the diffusion sheet for making the backlight more uniform.

[0083] In the embodiments of the present application, referring to Figure 2 and Figure 3The backlight module 30 further comprises a glue frame assembly 38, which comprises a first glue frame 381 and a second glue frame 382. The first glue frame 381 is arranged at the periphery of the side plate assembly 312 opposite to the back plate body 311 and the optical film assembly 37 opposite to the diffusion plate 351, i.e. the first glue frame 381 covers the side plate assembly 312 opposite to the back plate body 311 and the edge of the optical film assembly 37 close to the periphery. The second glue frame 382 is connected to the outer periphery of the first glue frame 381 and extends towards the back plate body 311, and the second glue frame 382 is located outside the side plate assembly 312. The first glue frame 381 is used to protect the optical film assembly 37 and the side plate assembly 312, and the second glue frame 382 is used to protect the side plate assembly 312.

[0084] In an example embodiment, the first glue frame 381 and the second glue frame 382 can be hollow frame structures.

[0085] In an example embodiment, the first glue frame 381 and the second glue frame 382 can be integrally formed.

[0086] In an example embodiment, referring to Figure 1 and Figure 3 The glue frame assembly 38 further comprises a first limiting piece 383 and a second limiting piece 384. The first limiting piece 383 is arranged on the side of the first glue frame 381 facing the optical film assembly 37 and around the periphery of the optical film assembly 37. The second limiting piece 384 is connected to the periphery of the first glue frame 381 and located on the side of the first glue frame 381 opposite to the second glue frame 382 and the periphery of the display panel 10. The first limiting piece 383 is used to limit the position of the optical film assembly 37 on the diffusion plate 351. The second limiting piece 384 is used to limit the position of the display panel 10 on the backlight module 30.

[0087] In an example embodiment, the first limiting piece 383 and the second limiting piece 384 can be hollow frame structures.

[0088] In an example embodiment, the first glue frame 381, the first limiting piece 383 and the second limiting piece 384 can be integrally formed. For example, the first limiting piece 383 is protruded on the side of the first glue frame 381 facing the optical film assembly 37, and the second limiting piece 384 is protruded at the periphery of the first glue frame 381 opposite to the second glue frame 382, i.e. the first limiting piece 383 and the second limiting piece 384 are respectively protruded on the opposite sides of the first glue frame 381.

[0089] In the embodiments of the present application, please refer to Figure 1 With Figure 3 The backlight module 30 further comprises a supporting element 39, which is arranged between the second adhesive frame 382 and the display panel 10 and is located at the inner side of the second limiting member 384. The supporting element 39 is used to support the display panel 10.

[0090] In the exemplary embodiments, the material of the supporting element 39 can be rubber.

[0091] In the embodiments of the present application, please refer to Figure 3 The backlight module 30 further comprises a detection module 41 and a control module 42, which can be arranged on the side of the back plate body 311 opposite to the first driving plate 331 of the first light emitting assembly 33. The detection module 41 can also be arranged on the shell of the display device 100. The control module 42 is electrically connected with the detection module 41 and the second light emitting assembly 34 respectively. The detection module 41 is used to detect the ambient light intensity to obtain a brightness signal and send the brightness signal to the control module 42. The control module 42 controls the second light emitting assembly 34 to emit light or not according to the brightness signal.

[0092] In the exemplary embodiments, the detection module 41 can be a light intensity detection device, and the control module 42 can be an integrated circuit.

[0093] In summary, the display device provided by the embodiments of the present application comprises a display panel 10 and a backlight module 30. The backlight module 30 comprises a first light emitting assembly 33 and a second light emitting assembly 34. When the display device 100 is used in an indoor environment, the first light emitting assembly 33 emits light, and the second light emitting assembly 34 does not emit light. The light emitting intensity of the backlight module 30 can meet the needs of the display device 100 used indoors. When the display device 100 is used in an outdoor environment, the first light emitting assembly 33 and the second light emitting assembly 34 both emit light, and the light emitting intensity of the backlight module 30 increases to meet the needs of the display device 100 used outdoors, avoiding the display device 100 displaying unclear pictures caused by strong outdoor light, improving the adaptability of the display device 100 to different ambient light intensities, and enabling the display device 100 to clearly display pictures indoors and outdoors. In addition, when the first light emitting assembly 33 emits light, the second light emitting assembly 34 selectively emits light or does not emit light according to the ambient light intensity, so that the backlight module 30 can provide corresponding light emitting intensity according to the ambient light intensity to meet the specific needs of the display device 100 used indoors or outdoors, thereby expanding the use scenarios of the display device 100.

[0094] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any appropriate way in one or more embodiments or examples.

[0095] It should be understood that the application of the present application is not limited to the above examples, and those of ordinary skill in the art can make improvements or changes according to the above description, and all such improvements and changes shall fall within the scope of protection of the claims of the present application. Those of ordinary skill in the art can understand that all or part of the processes of the above embodiments are implemented, and equivalent changes made in accordance with the claims of the present application, still fall within the scope of the present application.

Claims

1. A backlight module comprising a back plate, the back plate comprising a back plate body and a side plate assembly, the side plate assembly being connected to a peripheral edge of the back plate body and enclosing a receiving space with the back plate body, characterized in that, The backlight module further comprises a first light-emitting assembly and a second light-emitting assembly, the first light-emitting assembly and the second light-emitting assembly are both located in the accommodating space, and the first light-emitting assembly is arranged on the back plate body and used for realizing global dimming and regional dimming, the first light-emitting assembly comprises a first driving plate and a plurality of first light-emitting units, the first driving plate is arranged on the side of the back plate body facing the accommodating space, and the plurality of first light-emitting units are arranged on the side of the first driving plate away from the back plate body, the second light-emitting assembly is arranged on the side of the side plate assembly facing the accommodating space, the second light-emitting assembly comprises a second driving plate and a plurality of second light-emitting units, the second driving plate is arranged in the accommodating space and connected to the side of the side plate assembly facing the accommodating space, and the plurality of second light-emitting units are arranged on the side of the second driving plate away from the side plate assembly; wherein the second light-emitting assembly selectively emits light or does not emit light according to the ambient light intensity when the first light-emitting assembly emits light. The backlight module further comprises a diffusion plate assembly, the diffusion plate assembly comprises a diffusion plate and a plurality of light guide elements, the diffusion plate is arranged on the side of the first light-emitting unit away from the first driving plate and the side of the second light-emitting unit away from the second driving plate, a groove is formed on the side of the diffusion plate facing the plurality of second light-emitting units, a plurality of mounting holes are formed on the bottom wall of the groove, the plurality of mounting holes extend towards the side of the diffusion plate away from the plurality of second light-emitting units and do not penetrate through the diffusion plate, the plurality of light guide elements are accommodated in the mounting holes and do not protrude from the side of the diffusion plate away from the second light-emitting unit, the positions of the plurality of light guide elements correspond to the positions of the plurality of second light-emitting units one by one, and the light guide elements are used for guiding the light emitted by the second light-emitting unit to the diffusion plate. The backlight module further comprises an optical film assembly and a rubber frame assembly, the optical film assembly is arranged on the side of the diffusion plate away from the first light-emitting assembly, the rubber frame assembly comprises a first rubber frame, a second rubber frame, a first limiting piece and a second limiting piece, the first rubber frame is arranged on the side of the side plate assembly away from the back plate body and the periphery of the side of the optical film assembly away from the diffusion plate, the second rubber frame is connected to the outer periphery of the first rubber frame and extends towards the back plate body along the outer side of the side plate assembly, the first limiting piece is arranged on the side of the first rubber frame facing the optical film assembly and surrounds the periphery of the optical film assembly, and the second limiting piece is connected to the periphery of the first rubber frame and located on the side of the first rubber frame away from the second rubber frame and the periphery of the display panel.

2. The backlight module of claim 1, wherein, The plurality of first light-emitting units are electrically connected with the first driving plate, and the first driving plate is used for driving the plurality of first light-emitting units to emit light. The plurality of second light-emitting units are electrically connected with the second driving plate, and the second driving plate is used for driving the plurality of second light-emitting units to emit light.

3. The backlight module of claim 2, wherein, The diffusion plate is used to homogenize the light emitted by the plurality of first light emitting units.

4. The backlight module of claim 1, wherein, The diameter of the light guide element is 1mm to 2mm.

5. The backlight module of claim 1, wherein, The distance between two adjacent light guide elements is 5mm to 10mm.

6. The backlight module of claim 1, wherein, The diffusion plate assembly further comprises a light shielding layer, which is arranged on the bottom wall of the groove, and the opening of the mounting hole exposes the light shielding layer, which is used for light shielding.

7. The backlight module of claim 1, wherein, The diffusion plate assembly further comprises an encapsulation layer, which is filled in the groove to fix the plurality of light guide elements to the diffusion plate.

8. The backlight module of any one of claims 1-7, wherein, The backlight module further comprises a detection module and a control module, the control module is electrically connected with the detection module and the second light emitting assembly respectively, the detection module is used to detect the ambient light intensity to obtain a brightness signal, and send the brightness signal to the control module, the control module controls the second light emitting assembly to emit light or not according to the brightness signal.

9. A display device, characterized by comprising: The display panel is arranged on the light emitting side of the backlight module.

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