Backlight module and display device

Abstract

The utility model discloses a backlight module and a display device. The backlight module comprises a back plate, an adapter plate assembly, a connecting assembly and a plurality of lamp panel sets, the back plate is provided with a first side and a second side which are opposite in the front-back direction of the back plate, the lamp panel sets are installed on the first side, and the adapter plate assembly is electrically connected with the lamp panel sets; a through hole penetrating through the back plate in the front-back direction of the back plate is formed in the back plate, the connecting assembly comprises a fixing piece and a limiting piece, the fixing piece penetrates through the through hole, and the fixing piece is used for fixing the backlight module to an external object; the limiting piece is located between the first side of the back plate and the adapter plate assembly, and the adapter plate assembly is connected with the limiting piece. According to the backlight module, the fixing piece absorbs part of vibration energy through cooperation of the through hole and the back plate, meanwhile, the limiting piece locks the adapter plate assembly in the limiting space through rigid connection, shaking or displacement of the adapter plate assembly due to vibration is avoided, and the overall performance of the backlight module is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to display device technical field especially, it relates to a backlight module and display device. BACKGROUND

[0002] In the production and application process of the backlight module, the adapter plate assembly as a key component for realizing circuit connection bears an important role of signal transmission and function expansion.

[0003] In the prior art, the adapter plate assembly is prone to displacement or falling due to factors such as thermal expansion and contraction caused by external vibration and temperature change, thereby affecting the overall performance of the backlight module. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problems that in the prior art, the adapter plate assembly is prone to displacement or falling due to factors such as thermal expansion and contraction caused by external vibration and temperature change, thereby affecting the overall performance of the backlight module.

[0005] To solve the above problems, on the one hand, the utility model embodiment provides a backlight module, including backboard, adapter plate assembly, connecting assembly and a plurality of lamp plate groups, the backboard has the first side and the second side opposite along its front and back direction, the lamp plate group is installed on the first side, the adapter plate assembly is electrically connected with the lamp plate group;

[0006] The through hole is provided on the backboard and penetrates the backboard along the front and back direction, the connecting assembly includes a fixing part and a limiting part, the fixing part is provided in the through hole, and the fixing part is used for fixing the backlight module to an external object;

[0007] The limiting part is located between the first side of the backboard and the adapter plate assembly, and the adapter plate assembly is connected with the limiting part; The limiting part includes a connecting frame, a first limiting plate and a second limiting plate, the connecting frame is connected with the fixing part; Along the front and back direction of the backboard, the first limiting plate and the second limiting plate are located on the same side of the connecting frame, and the first limiting plate and the second limiting plate are spaced apart on the connecting frame along the up and down direction of the backboard, the first limiting plate, the second limiting plate and the connecting frame enclose a limiting space, and the adapter plate assembly is limited in the limiting space.

[0008] Optionally, the connecting frame is provided with a first mounting hole, the adapter plate assembly is provided with a second mounting hole, the first mounting hole and the second mounting hole are in communication with each other, and the first mounting hole and the second mounting hole are adapted to be inserted with a fastener to connect the connecting frame with the adapter plate assembly.

[0009] Optionally, the connecting frame comprises a base plate, a first side plate and a second side plate, the first limiting plate and the second limiting plate are arranged on the base plate, and the first side plate and the second side plate are located on a side of the base plate away from the first limiting plate.

[0010] The first side plate and the second side plate are arranged in a left-right direction of the back plate.

[0011] Optionally, the first side plate comprises a first connecting segment and a second connecting segment connected to each other, one end of the first connecting segment away from the second connecting segment is connected to the base plate, the first connecting segment extends in a front-rear direction of the back plate, and the second connecting segment extends in a direction away from the second side plate.

[0012] And / or, the second side plate comprises a third connecting segment and a fourth connecting segment connected to each other, one end of the third connecting segment away from the fourth connecting segment is connected to the base plate, the third connecting segment extends in the front-rear direction of the back plate, and the fourth connecting segment extends in a direction away from the first side plate.

[0013] Optionally, the first side is provided with a groove portion and a bearing portion, the through hole and the groove portion are in communication, the lamp plate group is arranged on the bearing portion, and the limiting member and the adapter plate assembly are arranged on the groove portion.

[0014] Optionally, the adapter plate assembly comprises a plurality of adapter plates, a plurality of the lamp plate groups and a plurality of the adapter plates are arranged in sequence in an up-down direction of the back plate, and a plurality of the adapter plates and a plurality of the lamp plate groups are electrically connected one by one.

[0015] Optionally, the lamp plate group comprises a plurality of lamp plates arranged in sequence in a left-right direction of the back plate, the adapter plate comprises a first adapter plate and a second adapter plate, the first adapter plate and the second adapter plate are arranged in sequence in the left-right direction of the back plate, and the first adapter plate and the second adapter plate are electrically connected.

[0016] Part of the plurality of lamp plates is electrically connected to the first adapter plate, and another part of the plurality of lamp plate groups is electrically connected to the second adapter plate.

[0017] Optionally, the adapter plate assembly comprises two adapter plates, and the two adapter plates are symmetrically arranged relative to a preset position.

[0018] Optionally, the backlight module further comprises a diffusion sheet, the diffusion sheet is located on a side of the lamp panel group away from the back plate, the back plate is provided with a support frame, the support frame comprises a square support seat and a support column arranged on the support seat, the lamp panel group is provided with a square hole, the support seat is located in the square hole, and one end of the support column away from the support seat is connected with the diffusion sheet.

[0019] According to the backlight module provided in the embodiment of the present application, the fixing member is arranged in the through hole of the back plate, the backlight module is fixed on an external object (such as a wall), and a mechanical support base is formed. The connecting frame of the limiting member is directly connected (such as welding, buckling or the like) with the fixing member, so that the limiting member and the fixing member form a rigid whole, and the position stability of the limiting member is ensured. The adapter plate assembly is embedded in the limiting space, and the first limiting plate, the second limiting plate and the connecting frame form physical constraints from three directions (up and down and one side). When external vibration or thermal expansion and cold contraction causes displacement of the adapter plate assembly, the limiting plate directly blocks the movement, so that the electrical connection between the adapter plate assembly and the lamp panel group is stable. When external vibration is transmitted to the back plate, the fixing member absorbs part of the vibration energy through the cooperation of the through hole and the back plate, and at the same time, the limiting member "locks" the adapter plate assembly in the limiting space through the rigid connection, so that the adapter plate assembly is prevented from shaking or shifting due to vibration, and the overall performance of the backlight module is ensured.

[0020] The display device provided in the embodiment of the present application comprises the backlight module. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the embodiment of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiment of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0022] Figure 1 is a structural schematic view of a first perspective of the backlight module provided in the embodiment of the present application;

[0023] Figure 2 is a structural schematic view of a second perspective of the backlight module provided in the embodiment of the present application;

[0024] Figure 3 is an exploded view of the backlight module provided in the embodiment of the present application;

[0025] Figure 4 is a schematic view of the backlight module provided in the embodiment of the present application after removing part of the structure;

[0026] Figure 5is a schematic view of a backlight module provided in another embodiment of the utility model after removing part structure;

[0027] Figure 6 is a schematic view of the connection relationship between the connection assembly and the adapter plate assembly of the backlight module provided in another embodiment of the utility model;

[0028] Figure 7 is a schematic view of the connection assembly of the backlight module provided in an embodiment of the utility model;

[0029] Figure 8 is a schematic view of the limiting piece of the backlight module provided in an embodiment of the utility model;

[0030] Figure 9 is a schematic view of the back plate of the backlight module provided in an embodiment of the utility model.

[0031] The reference signs in the specification are as follows:

[0032] 1, back plate;2, adapter plate assembly;21, adapter plate;211, first adapter plate;212, second adapter plate;3, connection assembly;31, fixing piece;32, limiting piece;321, connecting frame;3211, base plate;3212, first side plate;32121, first connecting section;32122, second connecting section;3213, second side plate;32131, third connecting section;32132, fourth connecting section;322, first limiting plate;323, second limiting plate;4, through hole;5, first mounting hole;6, lamp plate group;61, lamp plate;7, recessed groove part;8, bearing part;9, diffusion sheet;10, support frame;101, support seat;102, support column;20, optical film;30, reflecting sheet. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clearly understood, the utility model is further described in detail below by combining with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0034] In the description of the utility model, need understanding is, the orientation or position relation that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate is based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element referred to must have a particular orientation, to a particular orientation structure and operation, therefore can not be understood as the restriction of the utility model. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of " is two or more than two.

[0035] In the description of the utility model, it is necessary to explain that, unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood broadly, for example, it can be fixed connection, can be detachable connection, or integrally connected, can be mechanical connection, can be electrical connection, can be directly connected, can be indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0036] As Figures 1 to 9 Indicated, an embodiment of the utility model provides a backlight unit, including backboard 1, adapter plate assembly 2, connecting assembly 3 and multiple lamp plate groups 6, backboard 1 has the first side and the second side opposite along its front and rear direction, lamp plate group 6 is installed on the first side, adapter plate assembly 2 is electrically connected with lamp plate group 6;

[0037] Backboard 1 is provided with through hole 4 along its front and rear direction through backboard 1, connecting assembly 3 includes fixing piece 31 and limiting piece 32, fixing piece 31 is worn in through hole 4, fixing piece 31 is used for fixing the backlight unit to external object;

[0038] The limiting piece 32 is located between the first side of the back plate 1 and the adapter plate assembly 2, and the adapter plate assembly 2 is connected with the limiting piece 32; the limiting piece 32 comprises a connecting frame 321, a first limiting plate 322 and a second limiting plate 323, and the connecting frame 321 is connected with the fixing piece 31; along the front-rear direction of the back plate 1, the first limiting plate 322 and the second limiting plate 323 are located on the same side of the connecting frame 321, and the first limiting plate 322 and the second limiting plate 323 are spaced apart in the up-down direction of the back plate 1 and arranged on the connecting frame 321, and the first limiting plate 322, the second limiting plate 323 and the connecting frame 321 enclose a limiting space, and the adapter plate assembly 2 is limited in the limiting space. In this embodiment, taking the viewer's perspective as the reference, assuming that the side of the back plate 1 facing the display screen display surface is "front" (first side, install the lamp plate group 6 and the light emitting surface), and the side away from the display surface is "back" (second side, connect to the external shell or install the support). Taking the vertical extension direction of the back plate 1 as the reference, perpendicular to the front-rear direction, it usually corresponds to the longitudinal direction of the display screen (such as arranging the lamp plate group 6 from top to bottom). Taking the horizontal extension direction of the back plate 1 as the reference, perpendicular to the front-rear and up-down directions, it corresponds to the transverse direction of the display screen (such as arranging the lamp plate group 6 from left to right). This application mainly focuses on commercial display scenarios, and can be applied to large display devices such as conference panels and teaching all-in-one machines, to solve the reliability problems of traditional backlight modules in high-frequency movement (such as conference room equipment handling) and environmental temperature changes (such as temperature difference caused by air conditioner start-stop). The "three-sided enclosing limiting space" (first limiting plate 322, second limiting plate 323, connecting frame 321) of the limiting piece 32 fixes the adapter plate assembly 2 on the first side of the back plate 1, forms a rigid constraint, and effectively resists the displacement risk caused by external vibration; the rigid connection of the fixing piece 31 and the limiting piece 32 makes the fixing force of the adapter plate assembly 2 directly transmitted to the external installation object (such as the wall, the display screen shell) through the through hole 4 of the back plate 1, avoiding the problem of vibration loosening or falling caused by traditional single-point connection (such as welding, gluing), and ensuring the overall performance of the backlight module. The backlight module of the present application, the plurality of lamp plate groups 6 can be arranged as two rows of twelve lamp plates 61, each lamp plate 61 carries ninety-six LEDs, a total of one thousand one hundred and fifty-two lamps, each lamp plate 61 is equipped with twelve driving chips, each chip has eight channels, and each channel independently controls a typical voltage of 24V. Through system combination, the backlight module can create a high dynamic contrast, high color gamut commercial display product with one thousand one hundred and fifty-two partitions, suitable for conference and teaching scenarios, which can effectively improve the video display effect and optimize the viewing comfort. Through system integration to achieve the above high-performance display effect, the high-density LED partition control technology and mechanical stability design are deeply integrated, providing a solution for conference collaboration systems and teaching demonstration devices that combines professional display performance and reliability, and the circuit part adopts existing mature electrical connection technology, and the specific circuit principle is not described in this embodiment.

[0039] In an embodiment, the connecting frame 321 is provided with a first mounting hole 5, and the adapter plate assembly 2 is provided with a second mounting hole, the first mounting hole 5 and the second mounting hole are in communication with each other, and the first mounting hole 5 and the second mounting hole are adapted to insert a fastener to connect the connecting frame 321 and the adapter plate assembly 2. In this embodiment, when it is necessary to install the adapter plate assembly 2, the first mounting hole 5 on the connecting frame 321 is aligned with the second mounting hole on the adapter plate assembly 2, the two holes are in communication with each other, then the fastener (such as a screw, a bolt, etc.) is inserted, and by tightening or fixing the fastener, the connecting frame 321 and the adapter plate assembly 2 are firmly fixed together under the action of thread engagement or other fastening means. During the operation of the backlight module, even if affected by external vibration, thermal expansion and contraction caused by temperature changes, due to the fastening effect of the fastener, the adapter plate assembly 2 is difficult to displace relative to the connecting frame 321, and always maintains a stable position in the limiting space, ensuring the continuous and effective electrical connection with the lamp plate group 6. Compared with simply relying on the limiting space to limit the adapter plate assembly 2, the use of the fastener increases an additional fixing point, forming a double protection of "limiting space constraint + fastening connection", greatly reducing the risk of displacement and falling of the adapter plate assembly 2.

[0040] In an embodiment, the connecting frame 321 includes a base plate 3211, a first side plate 3212 and a second side plate 3213, the first limiting plate 322 and the second limiting plate 323 are arranged on the base plate 3211, and the first side plate 3212 and the second side plate 3213 are located on the side of the base plate 3211 away from the first limiting plate 322;

[0041] The first side plate 3212 and the second side plate 3213 are arranged in the left-right direction of the back plate 1. In this embodiment, by arranging the first side plate 3212 and the second side plate 3213 in the left-right direction of the back plate 1 on the fixing member 31, a symmetrical support structure is formed, which can enhance the connection strength between the connecting frame 321 and the fixing member 31, avoid displacement or falling of the adapter plate assembly 2 due to uneven stress, and thus ensure the stability of the overall performance of the backlight module. It can be understood that the "front, back, left and right directions" are reference descriptions based on the installation state of the back plate 1 (for example, the side of the back plate 1 facing the display picture can be defined as the "front side", the side away from the picture is the "back side", and the left-right direction is perpendicular to the front-back direction), which can be flexibly adjusted according to the installation direction of the device in actual application, and does not constitute the only limitation on the structure direction. At the same time, the device is suitable for commercial display screen field, especially for high requirement display equipment in conference, teaching and other scenes, through precise structure design and mature circuit system combination, high dynamic contrast, high color gamut display effect is realized, and visual experience is improved.

[0042] In an embodiment, the first side plate 3212 comprises a first connecting segment 32121 and a second connecting segment 32122 connected to each other, an end of the first connecting segment 32121 away from the second connecting segment 32122 is connected to the base plate 3211, the first connecting segment 32121 extends in the front-rear direction of the back plate 1, and the second connecting segment 32122 extends in a direction away from the second side plate 3213.

[0043] In an embodiment, the second side plate 3213 comprises a third connecting segment 32131 and a fourth connecting segment 32132 connected to each other, an end of the third connecting segment 32131 away from the fourth connecting segment 32132 is connected to the base plate 3211, the third connecting segment 32131 extends in the front-rear direction of the back plate 1, and the fourth connecting segment 32132 extends in a direction away from the first side plate 3212. In this embodiment, the first side plate 3212 and the second side plate 3213 form a triangular support structure through the L-shaped bending design of the "first connecting segment 32121 + second connecting segment 32122 / fourth connecting segment 32132", which significantly improves the bending stiffness of the side plate itself. The accommodation space enclosed by the L-shaped side plate and the base plate 3211 provides an embedded mounting position for the fixing member 31, so that the fixing member 31 extends into the end of the groove and is completely hidden inside the structure, avoiding direct impact of external force, while optimizing the internal space layout of the backlight module. In addition, a reinforcing rib is arranged in the groove, the adapter plate assembly 2 is arranged on the reinforcing rib, the reinforcing rib has a certain height, and the L-shaped side plate is arranged to make the height of the connecting frame 321 consistent with the height of the reinforcing rib, so as to ensure that the adapter plate assembly 2 is installed on a horizontal reference surface after installation, eliminate the inclination stress caused by the height difference, and improve the electrical connection reliability.

[0044] In an embodiment, the first side is provided with a groove part 7 and a bearing part 8, the through hole 4 communicates with the groove part 7, the lamp plate group 6 is arranged on the bearing part 8, and the limiting member 32 and the adapter plate assembly 2 are arranged in the groove part 7. In this embodiment, the adapter plate assembly 2 is placed in the groove part 7, and after the lamp plate group 6 is placed on the bearing part 8, the lamp plate group 6 is located in front of the adapter plate assembly 2. The adapter plate assembly 2 is accommodated in the groove part 7, and the lamp plate group 6 is installed on the bearing part 8, forming a front-rear layered three-dimensional layout, which fully utilizes the three-dimensional space of the back plate 1. The problem of thickness increase caused by the stacking of the lamp plate group 6 and the adapter plate assembly 2 in the same plane is avoided, the overall thickness of the backlight module is effectively compressed, which is consistent with the development trend of light and thin commercial display screens, and the risk of mutual interference of internal components is reduced.

[0045] In an embodiment, the adapter plate assembly 2 comprises a plurality of adapter plates 21, and the plurality of lamp plate groups 6 and the plurality of adapter plates 21 are arranged in sequence in the up-down direction of the back plate 1; the plurality of adapter plates 21 are electrically connected to the plurality of lamp plate groups 6 one by one. In this embodiment, the plurality of adapter plates 21 are electrically connected to the plurality of lamp plate groups 6 one by one and arranged in sequence in the up-down direction of the back plate 1, which shortens the length of the connection line between the adapter plate 21 and the corresponding lamp plate group 6. The loss in the signal transmission process is reduced, and faster and more accurate control can be achieved, ensuring that each lamp plate group 6 can respond in a timely manner according to the display requirements, providing strong support for commercial display screens to achieve high dynamic contrast, high refresh rate and other characteristics. In conference display, teaching courseware demonstration and other scenarios, the switching of the picture and the display of dynamic content are more smooth, and the visual experience is improved.

[0046] In an embodiment, the lamp plate group 6 comprises a plurality of lamp plates 61 arranged in sequence in the left-right direction of the back plate 1, the adapter plate 21 comprises a first adapter plate 211 and a second adapter plate 212, the first adapter plate 211 and the second adapter plate 212 are arranged in sequence in the left-right direction of the back plate 1, and the first adapter plate 211 and the second adapter plate 212 are electrically connected;

[0047] Part of the plurality of lamp plates 61 is electrically connected to the first adapter plate 211, and another part of the plurality of lamp plate groups 6 is electrically connected to the second adapter plate 212. In this embodiment, twelve lamp plates are arranged in two rows, six lamp plates 61 in each row, each lamp plate 61 carries ninety-six LEDs, a total of one thousand one hundred and fifty-two lamps, each lamp plate 61 is equipped with twelve driving chips, each chip has eight channels, and each channel independently controls a typical voltage of 24V. Each row corresponds to a first adapter plate 211 and a second adapter plate 212, and six lamp plates 61 are split in the left-right direction and controlled by two adapter plates 21 respectively, which shortens the length of the connection line between the adapter plate 21 and the lamp plate 61, reduces the signal transmission loss and delay, and enables the driving signal to be transmitted to each lamp plate 61 more quickly and accurately. Combined with the configuration of twelve driving chips and eight channels independently controlled for each lamp plate, fine dimming of one thousand one hundred and fifty-two partitions can be achieved, providing high dynamic contrast and high color gamut display effect for commercial display screens. In conference demonstration and teaching courseware display, the picture brightness details and color restoration performance are better, and the visual experience is improved. It can be understood that, due to the relatively long length of the single row of six lamp plates 61, if only one adapter plate 21 is used for connection, there will be problems such as complex wiring and high installation difficulty in the production process. After setting two adapter plates 21, the lamp plates 61 are connected in groups, which simplifies the production process, reduces the probability of installation errors caused by long lines and complex layout in the assembly process, improves production efficiency, and also reduces the increase in cost caused by rework.

[0048] In an embodiment, the adapter plate assembly 2 includes two groups of adapter plates 21, which are symmetrically arranged relative to the preset position. In this embodiment, the two groups of adapter plates 21 are symmetrically arranged relative to the preset position, so that no groove is needed to be arranged on the lower left side of the backboard 1 for installing the adapter plate assembly 2. The space on the lower left side of the backboard 1 is released, which creates conditions for installing an Android version module (such as an RK3588 chip module) on the back side of the backboard 1. The RK3588 chip has strong signal processing and audio / video decoding capabilities, and the module can efficiently complete signal output and audio / video processing tasks, realize the integrated design of the backlight module and display signal processing function, simplify the overall structure, and improve the integration of the product.

[0049] In an embodiment, the backlight module further includes a diffusion sheet 9 located on the side of the lamp plate group 6 away from the backboard 1, and the backboard 1 is provided with a support frame 10, which includes a square support seat 101 and a support column 102 arranged on the support seat 101. The lamp plate group 6 is provided with a square hole, the support seat 101 is located in the square hole, and one end of the support column 102 away from the support seat 101 is connected with the diffusion sheet 9. In this embodiment, the diffusion sheet 9 is located on the side of the lamp plate group 6 away from the backboard 1, which can effectively scatter the light emitted by the lamp plate group 6, reduce the directness and unevenness of the light, and make the backlight more uniform and soft. When the commercial display screen is used in conference and teaching scenes, local over-brightness or dark areas of the picture can be avoided, the display clarity and color consistency of text and images are improved, visual fatigue caused by long-time viewing of the audience is reduced, and the overall viewing comfort is enhanced.

[0050] According to the backlight module provided in the embodiment of the utility model, the fixing part 31 is arranged in the through hole 4 of the backboard 1, the backlight module is fixed on an external object (such as a wall), and a mechanical support base is formed. The connecting frame 321 of the limiting part 32 is directly connected (such as welding, buckling or the like) with the fixing part 31, so that the limiting part 32 and the fixing part 31 form a rigid whole, and the position stability of the limiting part 32 is ensured. The adapter plate assembly 2 is embedded in the limiting space, and is physically constrained from three directions (up and down and one side) by the first limiting plate 322, the second limiting plate 323 and the connecting frame 321. When external vibration or thermal expansion and cold contraction causes displacement of the adapter plate assembly 2, the limiting plate directly blocks the movement of the adapter plate assembly 2, so that the electrical connection between the adapter plate assembly 2 and the lamp plate group 6 is stable. When external vibration is transmitted to the backboard 1, the fixing part 31 absorbs part of the vibration energy through the cooperation with the through hole 4 of the backboard 1, and at the same time, the limiting part 32 "locks" the adapter plate assembly 2 in the limiting space through the rigid connection, so that the adapter plate assembly 2 is prevented from shaking or shifting due to vibration, and the overall performance of the backlight module is ensured.

[0051] The utility model discloses a display device, including the backlight module of above -mentioned embodiment, in this embodiment, display device still includes display screen, and display screen is integrated in the backlight module, and the composite structure of backlight module is through the limiting piece 32 and fixed part 31 (such as three face enclosure limit space, L shape side plate, reinforcing rib etc.), effectively resist the displacement or the risk of falling of adapter plate assembly 2 caused by outside vibration, temperature change, avoid the problem such as display screen backlight flicker, local dark area caused by circuit connection failure, especially suitable for the demand of equipment high frequency movement or long time operation in meeting, teaching scene. The backlight module of one thousand one hundred and fifty two subareas independent light control technology (two rows 12 lamp panels 61, and each lamp panel 51 ninety six channel control LED) cooperate high color gamut LED lamp pearl, make display device realize high dynamic contrast and wide color gamut coverage.

[0052] In an embodiment, the side of the diffusion sheet 9 facing away from the lamp panel 51 is provided with an optical film 20, and the adapter plate 21 is provided with a power connector and a communication interface connector, and is connected to an external backlight control panel through an electronic wire. In addition, the device is also provided with a reflecting sheet 30, thereby improving the utilization efficiency of the light source. The display device also includes an algorithm board, which mainly functions to input and output VBO signals and extract brightness information. The display device also includes a power management module, which includes a variable voltage, which is adjusted through real-time LED voltage drop feedback. Each module has clear division of labor and close cooperation, forming a complete closed loop from signal processing, dimming control to power management, ensuring reliable operation of the display device in complex application scenarios.

[0053] The above-described embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting them; although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model, and should be included in the protection scope of the present utility model.

Claims

1. A backlight module, characterized in that, The backboard has a first side and a second side opposite to each other along the front-rear direction, the lamp plate group is installed on the first side, and the adapter plate assembly is electrically connected with the lamp plate group; A through hole is arranged on the backboard and penetrates the backboard along the front-rear direction, the connecting assembly comprises a fixing member and a limiting member, the fixing member is arranged in the through hole, and the fixing member is used for fixing the backlight module to an external object; The limiting member is located between the first side of the backboard and the adapter plate assembly, the adapter plate assembly is connected with the limiting member, the limiting member comprises a connecting frame, a first limiting plate and a second limiting plate, the connecting frame is connected with the fixing member, along the front-rear direction of the backboard, the first limiting plate and the second limiting plate are located on the same side of the connecting frame, the first limiting plate and the second limiting plate are arranged on the connecting frame in the up-down direction of the backboard, and the first limiting plate, the second limiting plate and the connecting frame form a limiting space, and the adapter plate assembly is limited in the limiting space.

2. The backlight module of claim 1, wherein, A first mounting hole is arranged on the connecting frame, a second mounting hole is arranged on the adapter plate assembly, the first mounting hole and the second mounting hole are in communication with each other, and a fastener is inserted into the first mounting hole and the second mounting hole to connect the connecting frame and the adapter plate assembly.

3. The backlight module of claim 1, wherein, The connecting frame comprises a base plate, a first side plate and a second side plate, the first limiting plate and the second limiting plate are arranged on the base plate, and the first side plate and the second side plate are located on the side of the base plate away from the first limiting plate; The first side plate and the second side plate are arranged on the fixing member in the left-right direction of the backboard.

4. The backlight module of claim 3, wherein, The first side plate comprises a first connecting segment and a second connecting segment connected with each other, one end of the first connecting segment away from the second connecting segment is connected with the base plate, the first connecting segment extends in the front-rear direction of the backboard, and the second connecting segment extends away from the second side plate; And / or, the second side plate comprises a third connecting segment and a fourth connecting segment connected with each other, one end of the third connecting segment away from the fourth connecting segment is connected with the base plate, the third connecting segment extends in the front-rear direction of the backboard, and the fourth connecting segment extends away from the first side plate.

5. The backlight module of claim 1, wherein, The first side is provided with a groove portion and a bearing portion, the through hole is in communication with the groove portion, the lamp plate group is arranged on the bearing portion, and the limiting member and the adapter plate assembly are arranged on the groove portion.

6. The backlight module of claim 1, wherein, The adapter plate assembly comprises a plurality of adapter plates, a plurality of lamp plate groups and a plurality of adapter plates are arranged in sequence in the up-down direction of the backboard; a plurality of adapter plates and a plurality of lamp plate groups are electrically connected one by one.

7. The backlight module of claim 6, wherein, The lamp plate group comprises a plurality of lamp plates arranged in sequence in the left-right direction of the backboard, the adapter plate comprises a first adapter plate and a second adapter plate, the first adapter plate and the second adapter plate are arranged in sequence in the left-right direction of the backboard, and the first adapter plate and the second adapter plate are electrically connected; Part of the plurality of lamp panels is electrically connected with the first adapter plate, and another part of the plurality of lamp panel groups is electrically connected with the second adapter plate.

8. The backlight module of claim 1, wherein, The adapter plate assembly comprises two groups of adapter plates, and the two groups of adapter plates are symmetrically arranged relative to a preset position.

9. The backlight module of claim 1, wherein, The backlight module further comprises a diffusion sheet located on a side of the lamp panel group away from the back plate, the back plate is provided with a support frame, the support frame comprises a square support seat and a support column provided on the support seat, the lamp panel group is provided with a square hole, the support seat is located in the square hole, and one end of the support column away from the support seat is connected with the diffusion sheet.

10. A display device comprising: The backlight module comprises any one of claims 1 to 9. The backlight module comprises any one of claims 1 to 9.

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