Backlight module and display device

Abstract

The utility model relates to a display device which comprises a screen and a backlight module, the screen is arranged on the side, away from a cover body, of a backlight module, and a lamp panel faces the screen. The backlight module comprises a backlight assembly and a cover body, the backlight assembly is used for generating a light source on a screen, the backlight assembly comprises a lamp panel and a heat dissipation assembly, the heat dissipation assembly is attached to the lamp panel, and the heat dissipation assembly is provided with an air duct; the cover body is arranged on the heat dissipation assembly in a sleeving mode, an air opening is formed in the cover body, an air inlet and an air outlet are formed in the cover body, and the air channel is communicated with the air inlet and the air outlet. And heat emitted from the lamp panel can be effectively diffused and absorbed. The surface area of the heat dissipation assembly is large, heat is rapidly transferred to the heat dissipation assembly by making contact with the lamp panel, the cover body is arranged on the heat dissipation assembly in a sleeving mode, and air can flow in from the air inlet, penetrate through the air channel in the heat dissipation assembly and be exhausted from the air outlet. The flowing of the air flow not only can take away the heat of the lamp panel, but also effectively reduces the overall temperature in the backlight module and the display device through continuous air flow.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a backlight module and a display device using the backlight module. Background Art

[0002] In modern visual communication technology, display devices play a vital role. These devices are widely used in a variety of environments such as information display, entertainment systems, advertising, and education. In order to achieve high-quality image display, these devices usually use liquid crystal display technology (LCD), in which the backlight module is the core component, providing the necessary light source to ensure the brightness and color performance of the display. The backlight module generally includes components such as light source, light guide plate, reflector, diffuser and filter, which work together to improve the overall brightness and color performance of the display.

[0003] However, the existing backlight module technology has some technical limitations. The backlight module generates a considerable amount of heat during operation, which may have a negative impact on the performance and life of the device. These defects of the existing technology have limited the user experience and device performance.

[0004] Therefore, there is an urgent need to develop a backlight module and a display device to solve the problem of heat generation. Utility Model Content

[0005] The purpose of the present application is to overcome the deficiencies in the prior art and to provide a backlight module and a display device to reduce the heat generated by the backlight module during the operation of the display device.

[0006] This application is implemented through the following technical solutions:

[0007] The present application provides a display device, comprising a screen and a backlight module. The screen is mounted on a side of the backlight assembly away from the cover, and the light panel faces the screen.

[0008] The present application proposes a backlight module, which is applied to a display device, comprising:

[0009] A backlight assembly, used to generate a light source on the screen, the backlight assembly comprising a light board and a heat dissipation assembly, the heat dissipation assembly is attached to the light board, and the heat dissipation assembly has an air duct;

[0010] The cover body is sleeved on the heat dissipation component, the cover body is provided with an air port, the cover body is provided with an air inlet and an air outlet, and the air duct is respectively connected with the air inlet and the air outlet.

[0011] In one embodiment of the present application, the heat dissipation component includes:

[0012] A first heat dissipation plate, attached to the light panel;

[0013] A second heat dissipation plate is attached to the first heat dissipation plate, and an air duct is provided between the second heat dissipation plate and the first heat dissipation plate;

[0014] The blowing device is arranged between the air inlet and the air duct.

[0015] In one embodiment of the present application, a first concave surface is provided on a side of the first heat dissipation plate facing the second heat dissipation plate, and a second concave surface is provided on a side of the second heat dissipation plate facing the first heat dissipation plate. There is a distance between the first concave surface and the second concave surface to form the air duct.

[0016] In one embodiment of the present application, a plurality of first protrusions are provided on one side of the first heat dissipation plate or the second heat dissipation plate, and the plurality of first protrusions are attached to the first heat dissipation plate or the second heat dissipation plate to form a distance between the first concave surface and the second concave surface.

[0017] In one embodiment of the present application, one of the first heat dissipation plate or the second heat dissipation plate is provided with a plurality of first convex portions, and the other of the first heat dissipation plate or the second heat dissipation plate is provided with a plurality of second convex portions corresponding to the number of the plurality of first convex portions;

[0018] The plurality of first protrusions abut against the plurality of second protrusions in a one-to-one correspondence, so as to form a distance between the first concave surface and the second concave surface.

[0019] In one embodiment of the present application, each of the first protrusions extends along a first direction, each of the first protrusions has a spacing with an adjacent first protrusion in a second direction, and the first direction is perpendicular to the second direction;

[0020] The first concave surface forms a first air duct, a second air duct and a third air duct through the plurality of the first convex parts, the second air duct is connected to the first air duct and the second air duct on both sides respectively, the second air duct is located between any first convex part and the adjacent first convex part in the second direction, the airflow of the first air duct flows along the second direction, the airflow of the second air duct flows along the first direction, and the airflow of the third air duct flows along the second direction;

[0021] The first air duct is connected to the air inlet through the blowing device, and the third air duct is connected to the air inlet.

[0022] In one embodiment of the present application, the blowing device can drive the external air flow to pass through the air inlet, flow into the first air duct, the second air duct, and the third air duct in sequence, and flow out from the air outlet.

[0023] In one embodiment of the present application, the air inlet is arranged on the back side of the light board, the air outlet is arranged on one side of the light board, and the air outlet is perpendicular to the air inlet.

[0024] In one embodiment of the present application, the blowing device is a fan, and the fan can bring external air into and out of the air duct.

[0025] Compared with the prior art, the beneficial effects of this application are:

[0026] The backlight module includes a backlight assembly and a cover body. The backlight assembly includes a lamp board and a heat dissipation assembly. The screen is installed on the side of the backlight assembly away from the cover body. The heat dissipation assembly is attached to the lamp board, and the heat dissipation assembly has an air duct. The heat dissipation assembly is attached to the lamp board, and the heat dissipation assembly is made of metal material, which can effectively diffuse and absorb the heat emitted from the lamp board. The heat dissipation assembly has a large surface area, and by contacting the lamp board, the heat is quickly transferred to the heat dissipation assembly. The cover body is mounted on the heat dissipation assembly, and air can flow in from the air inlet, pass through the air duct in the heat dissipation assembly, and be discharged from the air outlet. This flow of air can not only take away the heat from the lamp board, but also effectively reduce the overall temperature inside the backlight module and the display device through continuous air flow, thereby improving the performance of the equipment and extending its life.

[0027] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures indicated in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A three-dimensional diagram of a display device provided in one embodiment of the present application;

[0030] Figure 2 A three-dimensional diagram of a display device provided in one embodiment of the present application;

[0031] Figure 3 An exploded perspective view of a display device provided in one embodiment of the present application;

[0032] Figure 4 An exploded perspective view of a display device provided in one embodiment of the present application;

[0033] Figure 5 An exploded perspective view of a backlight assembly provided in one embodiment of the present application;

[0034] Figure 6 An exploded perspective view of a backlight assembly provided in one embodiment of the present application;

[0035] Figure 7 A side view of a heat dissipation assembly provided in one embodiment of the present application;

[0036] Figure 8 for Figure 7 Cross-sectional view of the PP part.

[0037] Description of reference numerals:

[0038] 1. display device; 10. backlight module; 100. backlight assembly; 110. lamp board; 120. heat dissipation assembly; 1211. first air duct; 1212. second air duct; 1213. third air duct; 122. first heat sink; 1221. first concave surface; 1222. first convex portion; 123. second heat sink; 1231. second concave surface; 1232. second convex portion; 124. blowing device; 200. cover; 210. air inlet; 220. air outlet; 20. screen; X, first direction; Y, second direction. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of this application.

[0041] It should be noted that when an element is referred to as being "fixed on" or "set on" another component, it can be directly on the other component or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0042] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0044] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0045] Please refer to Figures 1 to 8 The present application proposes a display device 1, including a screen 20 and a backlight module 10. The screen 20 is installed on a side of the backlight assembly 100 away from the cover 200, and the light board 110 faces the screen 20.

[0046] Specifically, the display device 1 includes a screen 20 and a backlight module 10, wherein the screen 20 is mounted on a side of the backlight assembly 100 away from the cover 200, and the lamp board 110 faces the screen 20, that is, the lamp beads on the lamp board 110 face the screen 20. The backlight module 10 of the display device 1 is used to generate light sources on the screen 20, so that the content displayed on the screen 20 is visible.

[0047] Please refer to Figures 3 to 8 The present application proposes a backlight module 10, which is applied to a display device 1, and includes a backlight assembly 100 and a cover body 200. The backlight assembly 100 is used to generate a light source on a screen 20. The backlight assembly 100 includes a lamp board 110 and a heat dissipation assembly 120. The heat dissipation assembly 120 is attached to the lamp board 110, and the heat dissipation assembly 120 has an air duct (not marked); the cover body 200 is sleeved on the heat dissipation assembly 120, and the cover body 200 is provided with an air outlet. The cover body 200 is provided with an air inlet 210 and an air outlet 220, and the air ducts are respectively connected with the air inlet 210 and the air outlet 220.

[0048] Specifically, the backlight module 10 includes a backlight assembly 100, a heat dissipation assembly 120 and a cover 200. The lamp board 110 generates a large amount of heat during operation. If the heat is not dissipated in time, the temperature of the lamp board 110 will continue to rise, and a malfunction or even burns will occur if the temperature exceeds the safe temperature range. The heat dissipation assembly 120 is fitted with the lamp board 110. The heat dissipation assembly 120 is made of metal material and can effectively diffuse and absorb the heat emitted from the lamp board 110. The surface area of ​​the heat dissipation assembly 120 is large. By contacting the lamp board 110, the heat is quickly transferred to the heat dissipation assembly 120. The cover 200 is sleeved on the heat dissipation assembly 120. Air can flow in from the air inlet 210, pass through the air duct in the heat dissipation assembly 120, and be discharged from the air outlet 220. This flow of air can not only take away the heat of the lamp board 110, but also effectively reduce the overall temperature inside the backlight module 10 and the display device 1 through continuous air flow, thereby improving the performance of the device and extending its life.

[0049] By combining the above technical solutions, the overheating problem that may be caused by the traditional backlight module 10 can be solved, while minimizing the impact on the shape and weight of the device. In addition, due to the increased heat dissipation efficiency, the device is allowed to maintain or improve the light effect and color performance in a more compact design, thereby maintaining the beauty and portability of the device.

[0050] Please refer to Figure 5 and Figure 6 In one embodiment, the heat dissipation assembly 120 includes a first heat dissipation plate 122, a second heat dissipation plate 123 and a blowing device 124. The first heat dissipation plate 122 is attached to the lamp board 110; the second heat dissipation plate 123 is attached to the first heat dissipation plate 122, and there is an air duct between the second heat dissipation plate 123 and the first heat dissipation plate 122; the blowing device 124 is arranged between the air inlet 210 and the air duct.

[0051] Specifically, the second heat sink 123 is attached to the first heat sink 122, and there is an air duct between the second heat sink 123 and the first heat sink 122. The blowing device 124 is disposed between the air inlet 210 and the air duct, and an air circulation channel is formed through the air duct. The blowing device 124 is responsible for providing airflow in the air duct to accelerate the conduction and dissipation of heat between the first heat sink 122 and the second heat sink 123. The blowing device 124 takes away heat by blowing air on the air duct, thereby reducing the temperature of the lamp board 110.

[0052] Please refer to Figure 5 and Figure 6 In one embodiment, a first concave surface 1221 is provided on a side of the first heat dissipation plate 122 facing the second heat dissipation plate 123, and a second concave surface 1231 is provided on a side of the second heat dissipation plate 123 facing the first heat dissipation plate 122. There is a distance between the first concave surface 1221 and the second concave surface 1231 to form an air duct.

[0053] Specifically, there is a gap between the first concave surface 1221 and the second concave surface 1231, and the gap forms an air duct, which uses the air flow in the air duct to accelerate the transfer of heat from the lamp board 110 to the external environment. The existence of the gap allows more cold air to flow between the first concave surface 1221 and the second concave surface 1231, thereby enhancing the heat dissipation efficiency.

[0054] Please refer to Figure 5 and Figure 6 In one embodiment, a plurality of first protrusions 1222 are provided on one side of the first heat dissipation plate 122 or the second heat dissipation plate 123 , and the plurality of first protrusions 1222 are attached to the first heat dissipation plate 122 or the second heat dissipation plate 123 to form a distance between the first concave surface 1221 and the second concave surface 1231 .

[0055] Specifically, the first convex portion 1222 provides structural support between the first heat sink 122 and the second heat sink 123, while also maintaining a fixed spacing between the two concave surfaces. This spacing allows more air to flow between the heat sinks, thereby enhancing the heat dissipation effect.

[0056] Please refer to Figures 5 to 8 In one embodiment, one of the first heat dissipation plate 122 or the second heat dissipation plate 123 is provided with a plurality of first protrusions 1222, and the other of the first heat dissipation plate 122 or the second heat dissipation plate 123 is provided with a plurality of second protrusions 1232 corresponding to the number of the plurality of first protrusions 1222; the plurality of first protrusions 1222 and the plurality of second protrusions 1232 are abutted against each other one by one to form a spacing between the first concave surface 1221 and the second concave surface 1231.

[0057] Specifically, by abutting against the multiple first protrusions 1222 and the multiple second protrusions 1232 one by one, the spacing between the heat sinks can be very accurately controlled and maintained. This structure ensures that the air duct will not be deformed or closed due to external pressure or mechanical stress under any conditions of use.

[0058] Please refer to Figures 5 to 8In one embodiment, each first convex portion 1222 extends along the first direction X, and each first convex portion 1222 has a spacing between the adjacent first convex portion 1222 in the second direction Y, and the first direction X is perpendicular to the second direction Y; the first concave surface 1221 forms a first air duct 1211, a second air duct 1212 and a third air duct 1213 through multiple first convex portions 1222, and the two sides of the second air duct 1212 are respectively connected to the first air duct 1211 and the second air duct 1212, and the second air duct 1212 is located between any first convex portion 1222 and the adjacent first convex portion 1222 in the second direction Y, the airflow of the first air duct 1211 flows along the second direction Y, the airflow of the second air duct 1212 flows along the first direction X, and the airflow of the third air duct 1213 flows along the second direction Y; the first air duct 1211 is connected to the air inlet 210 through the blowing device 124, and the third air duct 1213 is connected to the air inlet 210.

[0059] Specifically, the two sides of the second air duct 1212 are connected to the first air duct 1211 and the second air duct 1212 respectively. The second air duct 1212 is located between any first convex portion 1222 and the adjacent first convex portion 1222 in the second direction Y. The airflow of the first air duct 1211 flows along the second direction Y, the airflow of the second air duct 1212 flows along the first direction X, and the airflow of the third air duct 1213 flows along the second direction Y. The first concave surface 1221 forms the first air duct 1211, the second air duct 1212 and the third air duct 1213 through a plurality of first convex portions 1222, and is arranged in a specific direction so that the air flow can more effectively shuttle between the heat dissipation plates, thereby taking away more heat. The airflow of the first air duct 1211 and the third air duct 1213 flows along the second direction Y, while the airflow of the second air duct 1212 flows along the first direction X. Such a cross-flow design helps to evenly dissipate heat and reduce hot spots.

[0060] Specifically, the first air duct 1211 is connected to the air inlet 210 through the blowing device 124, and the third air duct 1213 is connected to the air inlet 210. The blowing device 124 can drive the external air flow through the air inlet 210, flow into the first air duct 1211, the second air duct 1212, and the third air duct 1213 in sequence, and flow out from the air outlet 220. The blowing device 124 can drive the air flow to accelerate the flow, and the air flow increases the speed and efficiency of the air flowing through the heat sink, thereby effectively removing the heat generated by the lamp board 110. By ensuring that the air flow passes through each designed air duct in sequence, the heat exchange efficiency between the heat sinks is increased. This series of airflow paths helps to evenly disperse the heat transferred from the lamp board 110, thereby reducing the risk of local hot spots.

[0061] Please refer to Figures 5 to 8In one embodiment, the air inlet 210 is disposed on the back of the light board 110 , and the air outlet 220 is disposed on one side of the light board 110 , and the air outlet 220 is perpendicular to the air inlet 210 .

[0062] Specifically, the air inlet 210 of the cover 200 is arranged on the back of the lamp board 110 to directly provide cool air to the heat source (lamp board 110), which helps to immediately reduce the temperature of the lamp board 110, thereby avoiding heat accumulation. The air outlet 220 of the cover 200 is arranged on one side of the lamp board 110, perpendicular to the air inlet 210. This design allows the cool air entering through the back of the lamp board 110 to be discharged from the side after passing through the lamp board 110 horizontally. Such an air flow path helps to maximize the heat dissipation area and improve the heat dissipation efficiency.

[0063] In one embodiment, the blowing device 124 is a fan, and the fan can blow external air into and out of the air duct.

[0064] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A backlight module, applied to a display device, characterized in that: include: A backlight assembly, used to generate a light source on the screen, the backlight assembly comprising a light board and a heat dissipation assembly, the heat dissipation assembly is attached to the light board, and the heat dissipation assembly has an air duct; The cover body is sleeved on the heat dissipation component, the cover body is provided with an air port, the cover body is provided with an air inlet and an air outlet, and the air duct is respectively connected with the air inlet and the air outlet.

2. The backlight module according to claim 1, characterized in that: The heat dissipation component comprises: A first heat dissipation plate, attached to the light panel; A second heat dissipation plate is attached to the first heat dissipation plate, and an air duct is provided between the second heat dissipation plate and the first heat dissipation plate; The blowing device is arranged between the air inlet and the air duct.

3. The backlight module according to claim 2, characterized in that: A first concave surface is provided on a side of the first heat dissipation plate facing the second heat dissipation plate, and a second concave surface is provided on a side of the second heat dissipation plate facing the first heat dissipation plate. There is a distance between the first concave surface and the second concave surface to form the air duct.

4. The backlight module according to claim 3, characterized in that: A plurality of first convex portions are provided on one side of the first heat dissipation plate or the second heat dissipation plate, and the plurality of first convex portions are attached to the first heat dissipation plate or the second heat dissipation plate to form a distance between the first concave surface and the second concave surface.

5. The backlight module according to claim 3, characterized in that: One of the first heat dissipation plate or the second heat dissipation plate is provided with a plurality of first convex portions, and the other of the first heat dissipation plate or the second heat dissipation plate is provided with a plurality of second convex portions corresponding to the number of the plurality of first convex portions; The plurality of first protrusions abut against the plurality of second protrusions in a one-to-one correspondence, so as to form a distance between the first concave surface and the second concave surface.

6. The backlight module according to claim 4 or 5, characterized in that: Each of the first protrusions extends along a first direction, and each of the first protrusions has a spacing with an adjacent first protrusion in a second direction, and the first direction is perpendicular to the second direction; The first concave surface forms a first air duct, a second air duct and a third air duct through the plurality of the first convex parts, the second air duct is connected to the first air duct and the second air duct on both sides respectively, the second air duct is located between any first convex part and the adjacent first convex part in the second direction, the airflow of the first air duct flows along the second direction, the airflow of the second air duct flows along the first direction, and the airflow of the third air duct flows along the second direction; The first air duct is connected to the air inlet through the blowing device, and the third air duct is connected to the air inlet.

7. The backlight module according to claim 6, wherein: The blowing device can drive the external air flow to pass through the air inlet, flow into the first air duct, the second air duct, and the third air duct in sequence, and flow out from the air outlet.

8. The backlight module according to claim 1, wherein: The air inlet is arranged on the back side of the light board, the air outlet is arranged on one side of the light board, and the air outlet is perpendicular to the air inlet.

9. The backlight module according to claim 2, wherein: The blowing device is a fan, and the fan can allow external air to flow into and out of the air duct.

10. A display device, characterized in that: It comprises a screen and a backlight module as claimed in any one of claims 1 to 9, wherein the screen is mounted on a side of the backlight assembly away from the cover body, and the light panel faces the screen.

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