Display device and backlight module

Abstract

The present invention discloses a display device and a backlight module, wherein the backlight module comprises a frame and an optical film, wherein the frame comprises a bottom plate and a side plate, wherein a containing cavity is formed between the bottom plate and the side plate, wherein the side plate is provided with a connecting channel, wherein one end of the connecting channel is connected to the containing cavity, and the other end of the connecting channel is connected to the outside of the backlight module; and further comprises an elastic switch component, wherein the elastic switch component is installed on the side plate, wherein the connecting channel has an open state and a closed state, wherein the elastic switch component can be elastically deformed between the open state and the closed state under the action of the pressure difference on both sides of the connecting channel; in the open state, the connecting channel connects the containing cavity and the outside of the backlight module to balance the pressure; in the closed state, the connecting channel isolates the containing cavity and the outside of the backlight module to prevent impurities such as water vapor from entering the containing cavity.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display device and a backlight module. Background Art

[0002] Electronic devices such as mobile phones, computers, and televisions are equipped with display devices to achieve display functions.

[0003] In the related art, the display device includes a display panel and a backlight module. The backlight module and the display panel are connected, and an additional component in the form of a cover plate is also configured on the side of the display panel away from the backlight module to protect the display panel or add corresponding functions, such as touch function. The additional component and the display panel are connected by laminating. When laminating, in order to reduce the generation of bubbles, the laminating operation is usually performed in a vacuum environment. However, in a vacuum environment, there will be a pressure difference between the inside and outside of the display device. Under the action of this pressure difference, the display device is prone to expansion and deformation, resulting in undesirable phenomena such as laminating red and blue spots.

[0004] Therefore, how to provide a solution to overcome or alleviate the above-mentioned defects is still a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide a display device and a backlight module, wherein the accommodating cavity of the backlight module can be connected to the outside when the pressure difference between the inside and the outside is large to balance the pressure, thereby protecting the backlight module and the display device.

[0006] In order to solve the above technical problems, the present invention provides a backlight module, including a frame and an optical film, the frame including a bottom plate and a side plate, a containing cavity is formed between the bottom plate and the side plate, the side plate is provided with a connecting channel, one end of the connecting channel is connected to the containing cavity, and the other end of the connecting channel is connected to the outside of the backlight module; it also includes an elastic switch component, the elastic switch component is installed on the side plate, the connecting channel has an open state and a closed state, under the action of the pressure difference on both sides of the connecting channel, the elastic switch component can be elastically deformed between the open state and the closed state, in the open state, the connecting channel connects the containing cavity and the outside of the backlight module, in the closed state, the connecting channel isolates the containing cavity and the outside of the backlight module.

[0007] With this solution, the elastic switch component can be operated under the pressure difference on both sides of the communication channel to adjust its own state. Specifically, when the pressure difference is large, the elastic switch component can be adjusted in position so that the communication channel can be in an open state, and the communication channel can connect the accommodating cavity and the outside of the backlight module, thereby achieving a balance of pressure inside and outside the backlight module; when the pressure difference is small, the elastic switch component can rebound and reset so that the communication channel can be in a closed state, thereby isolating the accommodating cavity and the backlight module, so as to reduce the entry of impurities such as water vapor from the outside into the accommodating cavity during environmental testing and use, and the resulting problems such as poor film wrinkles.

[0008] Optionally, the connecting channel includes a first channel section and a second channel section, one end of the first channel section is a first air inlet, the first channel section is connected to the accommodating cavity through the first air inlet, one end of the second channel section is a first connecting port, the second channel section is connected to the first channel section through the first connecting port, the other end of the second channel section is connected to the outside of the backlight module, and the elastic switch component is installed on the first channel section.

[0009] Optionally, one end of the second channel section communicating with the outer side of the backlight module is a first exhaust port, and a flow area of ​​the first air inlet is larger than a flow area of ​​the first exhaust port.

[0010] Optionally, the elastic switch component includes a slider and an elastic member connected to each other, the first channel section includes a peripheral wall surface and a bottom wall surface connected to each other, the bottom wall surface and the first air inlet are relatively arranged along the extension direction of the first channel section, the first connecting port is arranged on the peripheral wall surface, the slider is slidably assembled on the first channel section, and the slider and the peripheral wall surface are sealed; the slider has a first working position and a second working position; in the first working position, the slider is located between the first connecting port and the bottom wall surface, and the connecting channel is in the open state; in the second working position, the slider blocks the first connecting port, or the slider is located between the first connecting port and the first air inlet, and the connecting channel is in the closed state.

[0011] Optionally, the connecting channel further includes a third channel segment, one end of the third channel segment is a second connecting port, the third channel segment is connected to the first channel segment through the second connecting port, and the other end of the third channel segment is connected to the outer side of the backlight module.

[0012] Optionally, the connecting channel also includes a fourth channel section, one end of the fourth channel section is connected to the accommodating cavity, the other end of the fourth channel section is a third connecting port, and the fourth channel section is connected to the first channel section through the third connecting port; the slider has a third working position, in the third working position, the slider is located between the first air inlet and the third connecting port, the third channel section and the fourth channel section are connected through the first channel section, and the connecting channel is in the open state.

[0013] Optionally, the elastic switch component includes a base and a deformation portion which are connected to each other, the base is mounted on the side plate, and the deformation portion can be flipped relative to the base under the action of the pressure difference.

[0014] Optionally, the base is cylindrical, the base is disposed in the connecting channel, and the outer wall surface of the base and the inner wall surface of the connecting channel are fixed.

[0015] Optionally, the side panel is a rubber frame.

[0016] The present invention further provides a display device, comprising a backlight module and a display panel, wherein the display panel is located at the light emitting side of the backlight module, and the backlight module is the above-mentioned backlight module.

[0017] Since the above-mentioned backlight module has the above-mentioned technical effects, the display device having the backlight module should also have similar technical effects, so it will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of the display device;

[0019] Figure 2 A schematic diagram of the structure of the display device provided by the present invention;

[0020] Figure 3 for Figure 2 A structural diagram of an embodiment in the AA direction, wherein the slider is in the second working position;

[0021] Figure 4 for Figure 2 A structural diagram of an embodiment in the AA direction, wherein the slider is in the first working position;

[0022] Figure 5 for Figure 2 A connection structure diagram of the elastic switch component and the frame wall in another embodiment;

[0023] Figure 6 for Figure 2A structural diagram of another embodiment in the direction of AA, wherein the connecting channel is in a closed state;

[0024] Figure 7 for Figure 2 A structural diagram of another embodiment in the AA direction, wherein the connecting channel is in an open state.

[0025] The following are the descriptions of the reference numerals:

[0026] 100 backlight module, 110 frame, 110a bottom plate, 110b side plate, 111 communication channel, 111a first channel section, 111a-1 first air inlet, 111a-2 peripheral wall, 111a-3 bottom wall, 111b second channel section, 111b-1 first communication port, 111b-2 first exhaust port, 111c third channel section, 111c-1 second communication port, 111c-2 second exhaust port, 111d fourth channel section, 111d-1 second air inlet, 111d-2 third communication port, 112 elastic switch component, 112a slider, 112b elastic component, 112c base, 112d deformation portion, 120 optical film;

[0027] 200 display panel;

[0028] 300 additional parts;

[0029] P contains the cavity. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] In the embodiments of the present invention, the terms "first", "second", "third", and "fourth" 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, the features defined as "first", "second", "third", and "fourth" may explicitly or implicitly include one or more of the features.

[0032] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0033] The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", etc., are only references to the directions of the drawings. Therefore, the directional terms used are for better and clearer description and understanding of the embodiments of the present invention, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present invention. In addition, unless otherwise specified in this application, the "multiple" mentioned in this application refers to two or more.

[0034] In the description of the embodiments of the present invention, the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0035] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of the display device.

[0036] like Figure 1 As shown, the present invention provides a display device, which can be specifically applied to electronic devices such as mobile phones, computers, televisions, billboards, etc. The display device includes a backlight module 100 and a display panel 200, wherein the display panel 200 is arranged on the light-emitting side of the backlight module 100, and the backlight module 100 is used to provide sufficient brightness and uniformly distributed light source for the display panel 200, so that the entire display device can display images normally.

[0037] The backlight module 100 has a receiving cavity P, and the receiving cavity P is used to install an optical film (not shown in the figure). After the display panel 200 and the backlight module 100 are assembled, the receiving cavity P is isolated from the outer space.

[0038] As described in the background technology section, in some embodiments, the side of the display panel 200 facing away from the backlight module 100 will also be attached with an additional component 300, and the additional component 300 can be, for example, a glass cover plate, etc., for protecting the display panel 200, or the additional component 300 can also be a touch panel with a touch circuit, etc., for adding a touch function to the display device. The attachment method of these additional components 300 is usually vacuum attachment, which can reduce bubbles in the attachment process. However, under a vacuum environment, there will be a relatively large pressure difference between the accommodating cavity P and the outer space. Under the effect of this pressure difference, the display device is very likely to expand and deform, and then there will be undesirable phenomena such as red and blue spots during attachment. In severe cases, it may even cause the display device to "explode".

[0039] To this end, an embodiment of the present invention provides a display device and a backlight module, wherein the backlight module is provided with a connecting channel and an elastic switch component, and the elastic switch component can open the connecting channel under the action of the internal and external pressure difference, so that the connecting channel can connect the accommodating cavity P and the external space to achieve the balance of internal and external pressures, thereby reducing the damage or adverse phenomena of the backlight module and the display device under the action of the internal and external pressure difference.

[0040] For details, please refer to Figure 2-Figure 7 , Figure 2 A schematic diagram of the structure of the display device provided by the present invention; Figure 3 for Figure 2 A structural diagram of an embodiment in the AA direction, wherein the slider is in the second working position; Figure 4 for Figure 2 A structural diagram of an embodiment in the AA direction, wherein the slider is in the first working position; Figure 5 for Figure 2 A connection structure diagram of the elastic switch component and the frame wall in another embodiment; Figure 6 for Figure 2 A structural diagram of another embodiment in the direction of AA, wherein the connecting channel is in a closed state; Figure 7 for Figure 2 A structural diagram of another embodiment in the AA direction, wherein the connecting channel is in an open state.

[0041] In the embodiment of the present invention, the backlight module 100 includes a frame 110 and an optical film 120 .

[0042] The frame 110 includes a bottom plate 110a and a side plate 110b. The bottom plate 110a and the side plate 110b can be an integral structure formed in one piece. Alternatively, the bottom plate 110a and the side plate 110b can also be manufactured separately, and then assembled by bonding, screw connection, clamping, welding, riveting and other connection methods. In this embodiment, the material of the bottom plate 110a and the side plate 110b can be flexibly adjusted to better meet the needs of use; illustratively, the side plate 110b can be a rubber frame to facilitate the processing of corresponding structures thereon, such as the connecting channel 111 mentioned later, and the bottom plate 110a can be made of metal to enhance the structural strength of the entire frame 110.

[0043] The bottom plate 110a and the side plate 110b may have a certain angle, which may be 90 degrees, or other angle values, which may be determined in combination with actual use requirements. The bottom plate 110a and the side plate 110b may enclose a receiving cavity P, and the aforementioned optical film 120 may be disposed in the receiving cavity P. The optical film 120 may include a light source, a reflective sheet, a light guide plate, a prism sheet, a diffuser, and the like.

[0044] The side plate 110b is provided with a communication channel 111. The communication channel 111 can be formed integrally with the side plate 110b when the side plate 110b is prepared, so that the preparation of the communication channel 111 can be relatively simple. Alternatively, the side plate 110b can be prepared first, and then the communication channel 111 is processed on the side plate 110b by machining processes such as turning and milling. One end of the communication channel 111 is connected to the accommodating cavity P, and the other end of the communication channel 111 is connected to the outside of the backlight module 100.

[0045] The backlight module 100 further includes an elastic switch component 112, which is mounted on the side plate 110b. The communication channel 111 has an open state and a closed state. In the open state, the communication channel 111 can connect the accommodating cavity P and the outside of the backlight module 100. In the closed state, the communication channel 111 is blocked by the elastic switch component 112, and the accommodating cavity P and the outside of the backlight module 100 are isolated.

[0046] In actual application, the elastic switch component 112 can be operated under the pressure difference on both sides of the connecting channel 111, such as elastic deformation, so as to adjust its own state. Specifically, when the pressure difference is large, the connecting channel 111 can be switched to an open state, so as to connect the accommodating cavity P and the outside of the backlight module 100 through the connecting channel 111, thereby achieving a balance of pressure inside and outside the backlight module 100; when the pressure difference is small, the elastic switch component 112 can rebound and reset, and the connecting channel 111 can be switched to a closed state, so as to isolate the accommodating cavity P and the backlight module 100, so as to reduce the entry of impurities such as water vapor from the outside into the accommodating cavity P during the test and use, and the problems such as poor film wrinkles caused by this.

[0047] In one embodiment, Figure 2-Figure 5 As shown, the communication channel 111 may include a first channel section 111 a and a second channel section 111 b .

[0048] The first channel section 111a can be a blind hole, including a peripheral wall surface 111a-2 and a bottom wall surface 111a-3. The opening of the first channel section 111a is a first air inlet 111a-1. The first air inlet 111a-1 and the bottom wall surface 111a-3 are arranged opposite to each other in the extension direction of the first channel section 111a. The first channel section 111a can be connected to the accommodating cavity P through the first air inlet 111a-1.

[0049] In the extension direction of the second channel section 111b, one end of the second channel section 111b is the first communication port 111b-1, and the other end of the second channel section 111b is the first exhaust port 111b-2. The second channel section 111b can be connected to the first channel section 111a through the first communication port 111b-1, and the specific setting position of the first communication port 111b-1 can be on the peripheral wall surface 111a-2 of the first channel section 111a. The second channel section 111b can be connected to the outer side of the backlight module 100 through the first exhaust port 111b-2. The number of the second channel sections 111b can be one or more, which is not limited here.

[0050] The elastic switch component 112 can be installed in the first channel section 111a. The elastic switch component 112 can include a slider 112a and an elastic member 112b connected to each other. The slider 112a can be slidably assembled in the first channel section 111a, and the slider 112a and the peripheral wall surface 111a-2 are sealed. The specific sealing setting method can be to configure a sealing ring on the peripheral wall surface of the slider 112a.

[0051] The slider 112a has a first working position and a second working position. Figure 4 As shown, in the first working position, the slider 112a is located between the first communication port 111b-1 and the bottom wall 111a-3, and the slider 112a can avoid the first communication port 111b-1. The second channel section 111b can be connected to the first channel section 111a through the first communication port 111b-1, and the communication channel 111 is in an open state. In the second working position, the slider 112a can block the communication between the first communication port 111b-1 and the first air inlet 111a-1, and the communication channel 111 is in a closed state. It should be understood that the blocking here includes two ways: 1) as Figure 3As shown, the slider 112a can directly block the first connecting port 111b-1 to directly block the connection between the second channel section 111b and the first channel section 111a; 2) the slider 112a can move to the area between the first air inlet 111a-1 and the first connecting port 111b-1. At this time, the slider 112a avoids the first connecting port 111b-1, and the second channel section 111b can be connected to the first channel section 111a through the first connecting port 111b-1. However, the slider 112a achieves blocking between the first connecting port 111b-1 and the first air inlet 111a-1, and the connecting channel 111 can still be maintained in a closed state.

[0052] Under normal conditions, that is, when the pressure inside and outside the backlight module 100 is substantially the same, the slider 112a can be in the second working position to isolate the accommodating cavity P from the outside of the backlight module 100, thereby largely preventing impurities such as water vapor from entering the accommodating cavity P. When the additional component 300 is attached under a vacuum environment, the pressure inside the accommodating cavity P is much greater than the pressure outside the backlight module 100. The slider 112a can be switched to the first working position under the action of the pressure difference between the inside and outside to connect the accommodating cavity P with the outside of the backlight module 100, and balance the pressure inside the accommodating cavity P and the outside of the backlight module 100. In this process, the elastic member 112b can accumulate elastic potential energy; when the pressure inside the accommodating cavity P and the outside of the backlight module 100 are substantially the same or relatively small, the elastic potential energy accumulated by the elastic member 112b can be released to drive the slider 112a to move back to the second working position.

[0053] The elastic member 112b can be a linear spring. There are many types of linear springs, which can be easily selected and have better elastic deformation and elastic reset performance, and can drive the slider 112a well. In addition, the elastic member 112b can also be an elastomer made of a material with a certain elastic deformation ability such as rubber.

[0054] In specific design, the flow area of ​​the first air inlet 111a-1 can be larger than the flow area of ​​the first exhaust port 111b-2. In this way, when the additional component 300 is vacuum-bonded, the gas in the accommodating cavity P can be discharged relatively easily; in normal use or environmental testing, impurities such as water vapor outside the backlight module 100 are not easy to enter the first channel section 111a and the accommodating cavity P through the second channel section 111b, which is conducive to improving the reliability of the backlight module 100 and the display device provided by the present invention.

[0055] The communication channel 111 may also include a third channel section 111c. In the extension direction of the third channel section 111c, one end of the third channel section 111c is a second communication port 111c-1, and the other end of the third channel section 111c is a second exhaust port 111c-2. The second communication port 111c-1 may be located on the bottom wall surface 111a-3 of the first channel section 111a, and the third channel section 111c may be connected to the first channel section 111a through the second communication port 111c-1, and the third channel section 111c may be connected to the outer side of the backlight module 100 through the second exhaust port 111c-2.

[0056] In this solution, the third channel section 111c can play the role of a balancing channel, which can balance the pressure between the space between the slider 112a and the bottom wall surface 111a-3 and the outer space of the backlight module 100, which is beneficial to improving the smoothness of the position adjustment of the slider 112a in the first channel section 111a.

[0057] Here, the embodiment of the present invention does not limit the number of the third channel segments 111c. In practical applications, those skilled in the art can set them according to specific needs as long as they can meet the requirements of use. Figure 3-Figure 5 As shown, the number of the third channel segments 111c can be multiple.

[0058] In addition, similar to the design of the aforementioned first exhaust port 111b-2, the flow area of ​​the second exhaust port 111c-2 may also be smaller than the first air inlet 111a-1, so as to increase the difficulty of impurities such as water vapor outside the backlight module 100 entering the first channel section 111a from the third channel section 111c. As for the first exhaust port 111b-2 and the second exhaust port 111c-2, the size of the flow area of ​​the two may not be limited. In practical applications, those skilled in the art may set them according to specific needs. For example, the flow areas of the first exhaust port 111b-2 and the second exhaust port 111c-2 may be consistent.

[0059] like Figure 5 As shown, the communication channel 111 may also include a fourth channel section 111d. In the extension direction of the fourth channel section 111d, one end of the fourth channel section 111d is the second air inlet 111d-1, and the other end of the fourth channel section 111d is the third communication port 111d-2, and the third communication port 111d-2 may be located on the peripheral wall surface 111a-2 of the first channel section 111a. The fourth channel section 111d may be connected to the accommodating cavity P through the second air inlet 111d-1, and the fourth channel section 111d may be connected to the first channel section 111a through the third communication port 111d-2.

[0060] The slider 112a may also have a third working position. In the third working position, the slider 112a can avoid the third communication port 111d-2, the third communication port 111d-2 can be connected to the second communication port 111c-1, and the communication channel 111 is in an open state.

[0061] Specifically, after the additional component 300 is vacuum-bonded, the pressure in the accommodating cavity P will be close to the vacuum state. When the display device is separated from the vacuum environment, the outside air pressure will be greater than the air pressure inside the accommodating cavity P. At this time, the outside gas can enter the first channel section 111a through the third channel section 111c, and drive the slider 112a to switch to the third working position, so that the slider 112a moves between the first air inlet 111a-1 and the third connecting port 111d-2. In this way, the third channel section 111c can be connected to the fourth channel section 111d through the first channel section 111a, and then the outside gas can be passed into the accommodating cavity P to achieve the balance of the internal and external pressures again. In this process, the elastic member 112b will also be deformed, thereby accumulating elastic potential energy. When the internal and external pressures are balanced, the elastic potential energy accumulated by the elastic member 112b can be released again to drive the slider 112a to switch to the second working position again, thereby switching the connecting channel 111 to the closed state.

[0062] In this embodiment, the slider 112a may be a circular cylinder, a square cylinder, a triangular cylinder, or other special-shaped cylinders, etc., which needs to be determined in combination with the cross-sectional shape of the first channel section 111a.

[0063] In another embodiment, if Figure 6 and Figure 7 As shown, the elastic switch component 112 may include a base portion 112c and a deforming portion 112d connected to each other, the base portion 112c may be mounted on the side plate 110b, and the deforming portion 112d may be turned over under the action of the pressure difference to open or close the communication channel 111. The pressure difference may be formed by the pressure of the accommodating cavity P being greater than the pressure outside, or the pressure outside being greater than the pressure of the accommodating cavity P.

[0064] The base 112c can be cylindrical in shape, and can be arranged in the connecting passage 111, and the outer wall of the base 112c can be connected to the inner wall of the connecting passage 111, and the specific connection method can be bonding, etc. The base 112c can be a cylindrical structure such as a circular cylindrical structure, a square cylindrical structure, a triangular cylindrical structure, etc., which is specifically related to the cross-sectional shape of the first passage section 111a. In addition, the base 112c can also be a flat plate, and then the base 112c can be connected to the inner wall of the side plate 110b, which is also feasible.

[0065] The number of the deformation portion 112d may be one or more, and may be specifically designed according to actual needs, which is not limited here.

[0066] In this embodiment, the connecting channel 111 may also include the aforementioned first channel section 111a and second channel section 111b, and the first connecting port 111b-1 of the second channel section 111b may be located on the peripheral wall surface 111a-2 of the first channel section 111a, or on the bottom wall surface 111a-3 of the first channel section 111a.

[0067] Combination Figure 6 When the pressure on both sides of the communication channel 111 is balanced, the deformation portion 112d is substantially perpendicular to the extension direction of the first channel section 111a to block the first channel section 111a, so that the communication channel 111 can be switched to a closed state to reduce the entry of impurities such as external water vapor into the accommodating cavity P. Figure 7 When the pressure difference between the two sides of the connecting channel 111 is large, the deformed portion 112d can be flipped to form a non-90 degree angle with the extension direction of the first channel section 111a, so that the connecting channel 111 can be switched to an open state to achieve a balance of the internal and external pressures of the backlight module 100.

[0068] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A backlight module, comprising a frame and an optical film, characterized in that: The frame includes a bottom plate and a side plate, a receiving cavity is formed between the bottom plate and the side plate, and the side plate is provided with a communication channel, one end of the communication channel is communicated with the receiving cavity, and the other end of the communication channel is communicated with the outer side of the backlight module; It also includes an elastic switch component, which is installed on the side plate, and the communication channel has an open state and a closed state. Under the pressure difference on both sides of the communication channel, the elastic switch component can be elastically deformed between the open state and the closed state. In the open state, the communication channel communicates with the accommodating cavity and the outside of the backlight module, and in the closed state, the communication channel isolates the accommodating cavity and the outside of the backlight module; The connecting channel includes a first channel section and a second channel section, one end of the first channel section is a first air inlet, and the first channel section is connected to the accommodating cavity through the first air inlet, one end of the second channel section is a first connecting port, and the second channel section is connected to the first channel section through the first connecting port, and the other end of the second channel section is connected to the outside of the backlight module, and the elastic switch component is installed on the first channel section.

2. The backlight module according to claim 1, characterized in that: One end of the second channel section communicating with the outer side of the backlight module is a first exhaust port, and a flow area of ​​the first air inlet is larger than a flow area of ​​the first exhaust port.

3. The backlight module according to claim 1, characterized in that: The elastic switch component includes a slider and an elastic member connected to each other, the first channel section includes a peripheral wall surface and a bottom wall surface connected to each other, the bottom wall surface and the first air inlet are arranged opposite to each other along the extension direction of the first channel section, the first communication port is arranged on the peripheral wall surface, the slider is slidably assembled on the first channel section, and the slider and the peripheral wall surface are sealed; The slider has a first working position and a second working position; in the first working position, the slider is located between the first communication port and the bottom wall surface, and the communication channel is in the open state; In the second working position, the slider blocks the first communication port, or the slider is located between the first communication port and the first air inlet, and the communication channel is in the closed state.

4. The backlight module according to claim 3, characterized in that: The communication channel also includes a third channel segment, one end of which is a second communication port, the third channel segment is connected to the first channel segment through the second communication port, and the other end of the third channel segment is connected to the outer side of the backlight module.

5. The backlight module according to claim 4, characterized in that: The communication channel further includes a fourth channel section, one end of which is communicated with the accommodating cavity, the other end of which is a third communication port, and the fourth channel section is communicated with the first channel section through the third communication port; The slider has a third working position. In the third working position, the slider is located between the first air inlet and the third connecting port, the third channel section and the fourth channel section are connected through the first channel section, and the connecting channel is in the open state.

6. The backlight module according to claim 1, characterized in that: The elastic switch component includes a base and a deformation portion that are connected to each other. The base is installed on the side plate, and the deformation portion can be turned over relative to the base under the action of the pressure difference.

7. The backlight module according to claim 6, characterized in that: The base is cylindrical and is disposed in the connecting passage. The outer wall surface of the base and the inner wall surface of the connecting passage are fixed.

8. The backlight module according to any one of claims 1 to 7, characterized in that: The side plate is a rubber frame.

9. A display device, comprising a backlight module and a display panel, wherein the display panel is located at a light-emitting side of the backlight module, characterized in that: The backlight module is the backlight module according to any one of claims 1 to 8.

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