Backlight module and display device

Abstract

The present application discloses a backlight module and a display device, relating to the field of display technologies. The backlight module includes a back plate, a light source assembly, an optical film assembly, a light transmission adjustment film, and an adjustment assembly. The light source assembly is disposed on the back plate, the optical film assembly is disposed on a side of the light source assembly away from the back plate, the light transmission adjustment film is disposed on a side of the optical film assembly facing the back plate, a plurality of light transmission holes are provided in the light transmission adjustment film, and the aperture of the light transmission holes is adjustable; the adjustment assembly is connected to the light transmission adjustment film and is used to adjust the aperture of the light transmission holes. Through the above design, the transmittance of the display panel can be adjusted as needed, improving the display effect of the display product and its competitiveness in the market.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a backlight module and a display device. Background Art

[0002] The display devices in the existing market are mainly backlight type liquid crystal display devices, which include a housing, a liquid crystal panel disposed in the housing, and a backlight module. Since the liquid crystal panel itself does not emit light and needs the light source provided by the backlight module to display images normally, the backlight module is one of the key components of the display device.

[0003] During the rapid development of display panels, the transmittance of display panels generally cannot be directly adjusted. However, during the actual use of display products, due to different environments and different user requirements, there are sometimes different requirements for the transmittance of display panels. Therefore, how to make the transmittance of display panels adjustable has become a research direction in the display field. Summary of the Invention

[0004] The purpose of this application is to provide a backlight module and a display device, which can adjust the transmittance of the display panel as needed, improve the display effect of the display product and its competitiveness in the market.

[0005] This application discloses a backlight module, which includes a back plate, a light source assembly, an optical film assembly, a light transmittance adjustment film, and an adjustment assembly. The light source assembly is disposed on the back plate, the optical film assembly is disposed on the side of the light source assembly away from the back plate, the light transmittance adjustment film is disposed on the side of the optical film assembly facing the back plate, and a plurality of light transmission holes are provided in the light transmittance adjustment film, and the aperture of the light transmission holes is adjustable; the adjustment assembly is connected to the light transmittance adjustment film and is used to adjust the aperture of the light transmission holes.

[0006] Optionally, the light transmittance adjustment film is a nanoporous film, the nanoporous film includes nanoparticles and polymer molecules, the size of the nanoparticles is smaller than the size of the polymer molecules, the nanoparticles are disposed in the pores formed by adjacent polymer molecules, and the gaps between adjacent polymer molecules form the light transmission holes; the adjustment assembly is a temperature control assembly, the temperature control assembly is connected to the nanoporous film, and adjusts the temperature of the nanoporous film; the polymer molecules are composed of a temperature-sensitive material, and when the nanoporous film is heated, the polymer molecules shrink, increasing the aperture of the light transmission holes.

[0007] Optionally, the temperature control assembly includes a heating film and a temperature controller, the heating film is disposed on the surface of the nanoporous film, and the temperature controller is connected to the heating film to control the heat emitted by the heating film.

[0008] Optionally, the electrothermal film includes a plurality of sub-electrothermal film portions, and the plurality of sub-electrothermal film portions are arranged side by side at intervals on the surface of the nanoporous film. The temperature controller is connected to the plurality of sub-electrothermal film portions at the same time to control the temperatures of the plurality of sub-electrothermal film portions simultaneously. Each sub-electrothermal film portion includes a plurality of cold film blocks and a plurality of hot film blocks. When the cold film blocks are energized, the temperature decreases, and when the hot film blocks are energized, the temperature increases. The cold film blocks and the hot film blocks are arranged alternately. The plurality of cold film blocks and the plurality of hot film blocks are all arranged side by side on the surface of the nanoporous film and are respectively connected to the temperature controller.

[0009] Optionally, the electrothermal film is disposed on the side of the optical film assembly facing the backplane, and the nanoporous film is disposed on the side of the electrothermal film facing the backplane. Both the nanoporous film and the electrothermal film are strip-shaped structures arranged side by side, and the orthographic projection of the nanoporous film on the backplane overlaps with the orthographic projection of the electrothermal film on the backplane.

[0010] Optionally, the nanoporous film is disposed on the side of the optical film assembly facing the backplane, and the electrothermal film is disposed on the side of the nanoporous film facing the backplane. The nanoporous film is a structure integrally disposed on the optical film assembly, and the surface area of the nanoporous film is equal to the surface area of the optical film assembly. The cold film blocks and the hot film blocks have the same shape, which is square. In each sub-electrothermal film portion, adjacent cold film blocks are arranged diagonally, and adjacent hot film blocks are arranged diagonally. Alternatively, the hot film blocks are circular rings, and the cold film blocks are circular. In each sub-electrothermal film portion, the hot film blocks are sleeved on the cold film blocks one by one, and the hot film blocks are arranged side by side in the same direction.

[0011] Optionally, the temperature control assembly further includes a heat conduction film layer. One end of the heat conduction film layer is connected to the light source assembly, and the other end of the heat conduction film layer is connected to the electrothermal film to transfer the heat on the light source assembly to the electrothermal film.

[0012] Optionally, the backplane includes a bottom plate and a side plate, and the side plate is perpendicular to the edge of the bottom plate. The backlight module further includes a rubber frame, a light guide plate, and a reflector. The reflector is disposed on the bottom plate, the light guide plate is disposed on the side of the reflector away from the bottom plate, the light source assembly is disposed on the side plate and is opposite to the side surface of the light guide plate. One end of the heat conduction film layer is disposed between the light source assembly and the side plate. The rubber frame is connected to the side plate, and a carrying platform parallel to the bottom plate is provided inside the rubber frame. The carrying platform is located on the side of the light guide plate away from the bottom plate. The optical film assembly is disposed on the carrying platform, and the heat conduction film layer is attached to the surface of the carrying platform.

[0013] Optionally, the backplane includes a bottom plate and side plates, the side plates are perpendicularly arranged to the edges of the bottom plate; the light source assembly includes a lamp board and lamp beads arranged on the lamp board, and the lamp board is arranged on the bottom plate; the backlight module further includes a rubber frame, the rubber frame is connected to the side plates, and a bearing platform parallel to the bottom plate is arranged on the inner side of the rubber frame, and the optical film assembly, the nanoporous film and the electrothermal film are all arranged on the bearing platform; one end of the heat-conducting film layer is arranged on the side of the lamp board facing the lamp beads, and the other end of the heat-conducting film layer is attached to the surface of the bearing platform and connected to the electrothermal film.

[0014] The present application also discloses a display device, which includes a display panel and the backlight module as described above, and the backlight module provides backlight for the display panel.

[0015] By adding a light transmission adjustment film and an adjustment component in the backlight module in the present application, the aperture of the light transmission holes in the light transmission adjustment film is adjusted by the adjustment component, and the amount of light emitted by the light source assembly passing through the light transmission adjustment film is changed, so as to achieve the purpose of adjusting the transmittance of the display panel. When the transmittance of the backlight module is adjustable, the backlight module can be applicable to display products with different transmittance requirements, so that the same display product can be divided into specifications with different transmittances, thereby meeting the needs of different customers, improving the display effect of the display product and its competitiveness in the market, and improving customer satisfaction. In addition, when the ambient light brightness changes, for example, from indoors to outdoors, the ambient brightness is relatively high, making it difficult to see the display screen clearly in a short time. After adopting the product of the present application, the same display effect can be achieved in different environments by adjusting the transmittance, thereby improving the display problems caused by the change of ambient light. Description of the Drawings

[0016] The included drawings are used to provide a further understanding of the embodiments of the present application, and they form a part of the specification, are used to illustrate the embodiments of the present application, and are used to explain the principles of the present application together with the text description. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0017] Figure 1 is a schematic diagram of a display device provided by an embodiment of the present application;

[0018] Figure 2 is a schematic diagram of a backlight module provided by an embodiment of the present application;

[0019] Figure 3 is a schematic diagram of a nanoporous film provided by an embodiment of the present application;

[0020] Figure 4It is a schematic diagram of a backlight module provided by an embodiment of the present application;

[0021] Figure 5 It is based on Figure 4 A further schematic diagram;

[0022] Figure 6 It is a schematic diagram of a backlight module provided by another embodiment of the present application;

[0023] Figure 7 It is Figure 6 A top view of the electrothermal film in

[0024] Figure 8 It is Figure 6 Another top view of the electrothermal film in

[0025] Figure 9 It is a schematic diagram of a backlight module provided by another embodiment of the present application;

[0026] Figure 10 It is a schematic diagram of a backlight module provided by another embodiment of the present application;

[0027] Figure 11 It is a schematic diagram of a backlight module provided by another embodiment of the present application.

[0028] Among them, 10 is a display device; 100 is a display panel; 200 is a backlight module; 201 is a rubber frame; 202 is a light guide plate; 203 is a reflective sheet; 204 is a carrier; 210 is a back plate; 211 is a bottom plate; 212 is a side plate; 220 is a light source assembly; 221 is a lamp board; 222 is a lamp bead; 230 is an optical film assembly; 231 is a first diffusion sheet; 232 is a prism sheet; 233 is a second diffusion sheet; 240 is a nanoporous film; 241 is nanoparticles; 242 is polymer molecules; 250 is a temperature control component; 260 is an electrothermal film; 261 is a sub-electrothermal film part; 262 is a cold film block; 263 is a hot film block; 270 is a temperature controller; 280 is a heat conduction film layer; 300 is a light transmission adjustment film; 310 is a light transmission hole; 400 is an adjustment component. Detailed implementation manners

[0029] It should be understood that the terms, specific structures and functional details disclosed here are only for describing specific embodiments and are representative, but the present application can be specifically implemented in many alternative forms and should not be construed as being limited only to the embodiments set forth herein.

[0030] In addition, unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] The present application will be further described below with reference to the accompanying drawings and optional embodiments.

[0032] Figure 1 is a schematic diagram of a display device provided by an embodiment of the present application. As Figure 1 shown, an embodiment of the present application provides a display device 10, and the display device 10 includes a display panel 100 and a backlight module 200. The backlight module 200 provides backlight for the display panel 100.

[0033] Figure 2 is a schematic diagram of a backlight module provided by an embodiment of the present application. As Figure 2 shown, the backlight module 200 includes a back plate 210, a light source assembly 220, an optical film assembly 230, a light transmission adjustment film 300, and an adjustment assembly 400. The light source assembly 220 is disposed on the back plate 210. The optical film assembly 230 is disposed on a side of the light source assembly 220 away from the back plate 210. The light transmission adjustment film 300 is disposed on a side of the optical film assembly 230 facing the back plate 210. A plurality of light transmission holes are provided in the light transmission adjustment film 300, and the aperture of the light transmission holes is adjustable. The adjustment assembly 400 is connected to the light transmission adjustment film 300 and is configured to adjust the aperture of the light transmission holes.

[0034] By adding the light transmission adjustment film 300 and the adjustment assembly 400 to the backlight module 200, the present application adjusts the aperture of the light transmission holes in the light transmission adjustment film 300 through the adjustment assembly 400, and changes the amount of light emitted by the light source assembly 220 passing through the light transmission adjustment film 300, so as to achieve the purpose of adjusting the transmittance of the display panel 100. When the transmittance of the backlight module 200 is adjustable, the backlight module 200 can be applied to display products with different transmittance requirements, so that the same display product can be divided into specifications with different transmittances, thereby meeting the needs of different customers, improving the display effect of the display product and its competitiveness in the market, and improving customer satisfaction. In addition, when the external environmental brightness changes, for example, from indoors to outdoors, the external brightness is relatively large, making it difficult to see the display screen clearly in a short time. After adopting the product of the present application, the purpose of achieving the same display effect in different environments can be achieved by adjusting the transmittance, thereby improving the display problem caused by the change of environmental light.

[0035] In an embodiment of the present application, the light-transmission adjusting film 300 is a nanoporous film 240, and the adjusting component 400 is a temperature control component 250. The temperature control component 250 is connected to the nanoporous film 240 to adjust the temperature of the nanoporous film 240. Of course, the light-transmission adjusting film 300 and the adjusting component 400 can also adopt other methods, as long as the light transmittance of the display panel can be adjusted by adjusting the pore diameter in the film, it can meet the design requirements of the present application.

[0036] As Figure 3 shown, it is a schematic diagram of a nanoporous film. In the implementation of the present application, the nanoporous film 240 is prepared by a self-assembly method, and is specifically composed of nanoparticles 241 and polymer molecules 242. The nanoparticles 241 are mixed in the polymer molecules 242; among them, the nanoparticles 241 are modified silica nanoparticles 241, and the polymer molecules 242 are composed of a temperature-sensitive material, and can specifically be composed of n-isopropylacrylamide (NIPAM) monomers. The nanoparticles 241 and the polymer molecules are polymerized by free radicals.

[0037] Among them, the variation range of the inner pore diameter of the nanoporous film 240 is 30nm - 100nm, the polymerization degree range is 80 - 250, and the thickness range of the nanoporous film 240 is 300um - 200um; after testing, when the design of the nanoporous film 240 meets the above parameter requirements, the stability and the light-adjusting effect can be further improved.

[0038] In the nanoporous film 240, the nanoparticles 241 provide a uniform pore structure after the polymer shrinks. The size of the nanoparticles 241 is smaller than the size of the polymer molecules 242. The nanoparticles 241 are arranged in the pores formed by adjacent polymer molecules 242. The gaps between adjacent polymer molecules 242 form the light-transmitting holes 310. When the nanoporous film 240 is heated and the temperature is at the critical temperature, the polymer molecules 242 shrink, increasing the pore diameter between adjacent polymer molecules 242. The larger the pore diameter, the more light passes through and the higher the transmittance; when the nanoporous film 240 senses a temperature decrease, the polymer molecules 242 begin to expand and return to their original shape, reducing the pore diameter between adjacent polymer molecules 242 and decreasing the transmittance. Since both the nanoparticles 241 and the polymer molecules 242 are transparent materials, the display product can still be used normally even under low-temperature conditions.

[0039] In the implementation of the present application, the temperature control component 250 includes a heating film 260 and a temperature controller 270. The heating film 260 is disposed on the surface of the nanoporous film 240, and the temperature controller 270 is connected to the heating film 260 to control the heat emitted by the heating film 260.

[0040] Specifically, the electrothermal film 260 includes a plurality of cold film blocks 262 and a plurality of hot film blocks 263. When the cold film blocks 262 are energized, the temperature decreases, and when the hot film blocks 263 are energized, the temperature increases. The cold film blocks 262 and the hot film blocks 263 are arranged alternately; a plurality of the cold film blocks 262 and a plurality of the hot film blocks 263 are both arranged side by side on the surface of the nanoporous film 240 and are respectively connected to the temperature controller 270. Since the cold film blocks 262 and the hot film blocks 263 are arranged alternately, all the cold film blocks 262 and all the hot film blocks 263 are in uniform contact with the surface of the nanoporous film 240, so that the nanoporous film 240 can be ensured to be heated evenly.

[0041] When it is necessary to increase the transmittance of the display product, all the hot film blocks 263 are energized through the temperature controller 270; and according to the transmittance level selected by the user, specifically by adjusting the magnitude of the current output by the temperature controller 270, the electrothermal film 260 is further caused to emit different temperatures, and then the aperture in the nanoporous film 240 is changed to adjust the transmittance. When it is necessary to decrease the transmittance of the display product, all the cold film blocks 262 are energized through the temperature controller 270, or all the cold film blocks 262 and the hot film blocks 263 are energized simultaneously, and by adjusting the magnitude of the current output by the temperature controller 270, the overall temperature of the electrothermal film 260 is adjusted, so as to achieve the purpose of adjusting the transmittance.

[0042] In addition, it is also possible to select local picture to adjust the transmittance according to the actual situation. At this time, after the user selects the picture, the cold film blocks 262 and the hot film blocks 263 corresponding to this picture are controlled through the temperature controller 270, so that the transmittance of this display area is different from that of other areas, showing different display effects.

[0043] Among them, the cold film block 262 can specifically adopt a polyimide electrothermal film 260, and the hot film block 263 can specifically adopt a polyethylene terephthalate electrothermal film 260.

[0044] As an embodiment of the present application, as Figure 4 shown, the backlight module 200 adopts a side-entry backlight design. The backplane 210 includes a bottom plate 211 and a side plate 212, and the side plate 212 is vertically arranged with respect to the edge of the bottom plate 211; the backlight module 200 further includes a rubber frame 201, a light guide plate 202, and a reflector 203. The reflector 203 is arranged on the bottom plate 211, the light guide plate 202 is arranged on the side of the reflector 203 away from the bottom plate 211, and the light source assembly 220 is a side light bar arranged on the side plate 212 and is arranged opposite to the side surface of the light guide plate 202.

[0045] The plastic frame 201 is connected to the side plate 212, and the inner side of the plastic frame 201, that is, the side of the plastic frame 201 facing the light guide plate 202, is provided with a support platform 204 parallel to the bottom plate 211, and the support platform 204 is located on the side of the light guide plate 202 away from the bottom plate 211. The optical film assembly 230 specifically includes a first diffuser 231, a prism sheet 232 and a second diffuser 233, the prism sheet 232 is sandwiched between the first diffuser 231 and the second diffuser 233, and the first diffuser 231 is located between the prism sheet 232 and the light guide plate 202. Of course, the optical film can also be composed of other types of optical films, which is not limited here.

[0046] In the embodiment of the present application, the entire layer of the electric heating film 260 is arranged on the first diffusion sheet 231, the entire layer of the nanoporous membrane 240 is arranged on the electric heating film 260, the second diffusion sheet 233, the prism sheet 232, the first diffusion sheet 231, the electric heating film 260 and the nanoporous membrane 240 are stacked in sequence from top to bottom on the supporting platform 204, and these membrane layer structures are supported and fixed by the supporting platform 204.

[0047] In this embodiment, both the nanoporous film 240 and the electric heating film 260 are made into a whole layer structure, that is, the area of ​​the nanoporous film 240 is the same as the area of ​​the electric heating film 260, the nanoporous film 240 and the electric heating film 260 have the same pattern, and the orthographic projection of the nanoporous film 240 on the back plate 210 overlaps with the orthographic projection of the electric heating film 260 on the back plate 210; even the areas of the film layers in the nanoporous film 240, the electric heating film 260 and the optical film assembly 230 are the same. Since the nanoporous film 240 is a whole layer structure, the transmittance of the entire display screen can be adjusted, and the electric heating film 260 is attached to the nanoporous film 240 as a whole layer, so that each part of the nanoporous film 240 can be heated, so that the temperature at each part of the nanoporous film 240 is the same, the internal pore size is the same, and the transmittance of each part of the display panel 100 is the same. Furthermore, since the electrothermal film 260 is pasted between the nanoporous film 240 and the optical film assembly 230, the light emitted by the light source assembly 220 first passes through the nanoporous film 240 and then passes through the electrothermal film 260. The nanoporous film 240 can regulate a larger base of light. Conversely, if the light emitted by the light source assembly 220 first passes through the electrothermal film 260, a portion of it will be lost by the electrothermal film 260, resulting in a reduction in the light passing through the nanoporous film 240, thereby reducing the base of light regulated by the nanoporous film 240, which will reduce the effect of regulating the transmittance.

[0048] Further, such as Figure 5As shown in the figure, the embodiment of the present application also adds a heat-conducting film layer 280 to the temperature control component 250. The function of the heat-conducting film layer 280 is to conduct heat, and it is made of a metal material that is easy to conduct heat, such as aluminum, copper, etc. One end of the heat-conducting film layer 280 is connected to the light source component 220, and the other end of the heat-conducting film layer 280 is connected to the electrothermal film 260, transferring the heat on the light source component 220 to the electrothermal film 260.

[0049] In this solution, since the light-emitting unit in the light source component 220 is likely to generate a large amount of heat when emitting light, how to effectively dissipate the heat of the light-emitting unit is also an important direction in this field. This embodiment can use the heat-conducting film layer 280 to transfer the heat generated by the light-emitting unit to the electrothermal film 260, which can not only effectively dissipate the heat of the light source component 220, but also recycle the heat, and can also supplement the heat provided by the electrothermal film 260 and the temperature controller 270 to reduce the power consumption of the temperature controller 270.

[0050] Specifically, in actual use, the heat-conducting film layer 280 first transfers the heat in the light source component 220 to the electrothermal film 260. The temperature sensing layer in the temperature controller 270 monitors the temperature of the heat-conducting film layer 280 conducted to the electrothermal film 260 layer. If it is found that the heat is insufficient, the hot film block 263 can be powered again to further increase the temperature of the electrothermal film 260 layer to adjust the transmittance of the display panel 100 to the required level.

[0051] In this embodiment, one end of the heat-conducting film layer 280 is clamped between the light source component 220 and the side plate 212, so that the heat-conducting film layer 280 has a large contact area with the light source component 220. The heat generated by the operation of the light source component 220 first passes through the heat-conducting film layer 280 and then diffuses to the back plate 210, further improving the utilization efficiency of the heat on the light source component 220. Moreover, the middle part of the heat-conducting film layer 280 is attached to the surface of the carrier table 204, pasted on the surface of the carrier table 204, and extends to be connected to the edge of the electrothermal film 260, avoiding the problem that the heat-conducting film layer 280 is scattered and affects the light path; in addition, a reflective material can be coated on the surface of the heat-conducting film layer 280 to improve the light utilization rate.

[0052] As another embodiment of the present application, as Figures 6 to 8 shown, the difference from the previous embodiment is that in this embodiment, both the electrothermal film 260 and the nanoporous film 240 are in a pattern structure of multiple strips.

[0053] Specifically, the electrothermal film 260 includes a plurality of sub-electrothermal film parts 261. Each sub-electrothermal film part 261 is in a long strip shape. The plurality of sub-electrothermal film parts 261 are evenly spaced and arranged side by side on the surface of the nanoporous film 240. The temperature controller 270 is connected to the plurality of sub-electrothermal film parts 261 at the same time to control the temperatures of the plurality of sub-electrothermal film parts 261 simultaneously. Each sub-electrothermal film part 261 includes a plurality of cold film blocks 262 and a plurality of hot film blocks 263. The plurality of cold film blocks 262 and the plurality of hot film blocks 263 are both arranged side by side on the surface of the nanoporous film 240 and are respectively connected to the temperature controller 270.

[0054] It should be noted that in this embodiment, a plurality of temperature sensors can be provided in the backlight module 200. Each sensor is respectively arranged at one end of each sub-electrothermal film part 261 to control the heat of the cold film blocks 262 and the hot film blocks 263 in the corresponding sub-electrothermal film part 261. Alternatively, only one temperature sensor can be provided in the backlight module 200 to control all the sub-electrothermal film parts 261, and only the corresponding wiring needs to be increased and the program of the temperature sensor needs to be adjusted accordingly.

[0055] At the other end of each sub-electrothermal film part 261, that is, the end of the sub-electrothermal film part 261 far from the temperature sensor, it is connected to the port of a heat conduction film layer 280 to provide heat for the plurality of sub-electrothermal film parts 261 simultaneously. Among them, a plurality of independent heat conduction film layers 280 can be provided in the backlight module 200. Each heat conduction film layer 280 is connected to a sub-electrothermal film part 261. Further, the number of the heat conduction film layers 280 can be made the same as the number of the light emitting units in the light source assembly 220, and each heat conduction film layer 280 is connected directly below the light emitting unit. Or, the number of the heat conduction film layers 280 is less than the number of the light emitting units. The heat conduction film layers 280 are all connected directly below the light emitting units, and at least one light emitting unit is spaced between adjacent heat conduction film layers 280.

[0056] In this embodiment, the nanoporous film 240 has the same pattern as the electrothermal film 260. The orthographic projection of the nanoporous film 240 on the backplane 210 overlaps with the orthographic projection of the electrothermal film 260 on the backplane 210. Since the nanoporous film 240 and the electrothermal film 260 are arranged in strips on the optical film assembly 230, in the case of realizing the adjustment of the transmittance, since a part of the space in the optical film assembly is not blocked by the nanoporous film 240 and the received light is not lost, the transmittance and the brightness of the display panel 100 can be further improved.

[0057] Such as Figure 7As shown, as an implementation manner of the sub-electrothermal film part, the cold film blocks 262 and the hot film blocks 263 have the same shape, both being square. In the sub-electrothermal film part 261, adjacent cold film blocks 262 are arranged diagonally, and adjacent hot film blocks 263 are arranged diagonally. As an example, in each sub-electrothermal film part 261, multiple cold film blocks 262 and multiple hot film blocks 263 are arranged in two rows, and the cold film blocks 262 and the hot film blocks 263 in each row are arranged alternately, and the cold film blocks 262 in the two rows do not contact each other. Among them, adjacent cold film blocks 262 and hot film blocks 263 can be connected to each other or not, which is specifically selected according to the actual situation.

[0058] With the above design, the cold film blocks 262 in the sub-electrothermal film part 261 do not agglomerate, and the hot film blocks 263 do not agglomerate either, thus having a good uniform temperature regulation effect.

[0059] As Figure 8 shown, as another implementation manner of the sub-electrothermal film part, the hot film blocks 263 are circular rings, and the cold film blocks 262 are circular. In the sub-electrothermal film part 261, the hot film blocks 263 are sleeved on the cold film blocks 262 one by one, and the hot film blocks 263 are arranged side by side in the same direction. As an example, in each sub-electrothermal film part 261, there is only one row of hot film blocks 263, and the cold film blocks 262 are correspondingly filled in each hot film block 263. Among them, the adjacent hot film blocks 263 in the sub-electrothermal film part 261 are connected together, which is beneficial to making each hot film block 263 in the sub-electrothermal film part 261 heat evenly; as for the cold film blocks 262, they can be connected to the adjacent hot film blocks 263 or not, which is specifically selected according to the actual situation.

[0060] With the above design, the contact area between the hot film blocks 263 and the cold film blocks 262 is larger, and the cold film blocks 262 can make the hot film blocks 263 reduce the temperature faster, so that the temperature regulation efficiency is higher.

[0061] As another implementation manner of the present application, as Figure 9 shown, the difference from the Figure 6 corresponding implementation manner is that in this implementation manner, only the electrothermal film 260 is in a pattern structure of multiple strips, while the nanoporous film 240 is a flat structure laid as a whole layer. The nanoporous film 240 is an integral structure, and the surface area of the nanoporous film 240 is equal to the surface area of the optical film assembly 230. Moreover, the nanoporous film 240 is arranged on the side of the optical film assembly 230 facing the backplane 210, and the electrothermal film 260 is arranged on the side of the nanoporous film 240 facing the backplane 210.

[0062] In this embodiment, since the nanoporous membrane 240 is a monolithic structure, the overall transmittance of the display panel 100 can be ensured to be consistent, making the overall display of the display panel 100 uniform. Moreover, the nanoporous membrane 240 is disposed between the optical film assembly 230 and the electrothermal film 260. In the assembly process, the nanoporous membrane 240 is first attached to the film layer of the optical film assembly 230, and then the electrothermal film 260 is formed on the nanoporous membrane 240; or the electrothermal film 260 is first formed on the nanoporous membrane 240, and then the nanoporous membrane 240 is attached to the film layer of the optical film assembly 230. This method can not only avoid the problem of unevenness of the nanoporous membrane 240 caused by the electrothermal film 260, but also, since the electrothermal film 260 is on the outermost layer and opposite to the light guide plate 202, it is also convenient for the heat conduction film layer 280 and the temperature controller 270 to be connected to the electrothermal film 260, and it can also avoid the direct contact between the electrothermal film 260 and the optical film assembly 230, transferring heat to the optical film assembly 230 and causing heat loss problems.

[0063] As another embodiment of the present application, as Figure 10 shown, the difference from the Figure 5 corresponding embodiment is that in this embodiment, the nanoporous membrane 240 and the electrothermal film 260 are attached to the light guide plate 202 instead of the optical film assembly 230. Specifically, the electrothermal film 260 is pasted on the light-emitting surface of the light guide plate 202, and the nanoporous membrane 240 is pasted on the electrothermal film 260.

[0064] In this embodiment, the distance between the electrothermal film 260 and the light source assembly 220 is closer, and the length of the heat conduction film layer 280 is shorter, which can reduce the loss of heat in the light source assembly 220 on the air and the heat conduction film layer 280, and is beneficial to improving the heat utilization rate.

[0065] Of course, in this embodiment, the positions of the nanoporous membrane 240 and the electrothermal film 260 can also be changed. Specifically, the nanoporous membrane 240 is first pasted on the light-emitting surface of the light guide plate 202, and then the electrothermal film 260 is pasted on the nanoporous membrane 240. The nanoporous membrane 240 and / or the electrothermal film 260 can also be made into a strip pattern. The specific details have been described in the above embodiments and will not be elaborated here.

[0066] As another embodiment of the present application, as Figure 11 shown, the difference from the above-mentioned multiple embodiments is that the backlight module 200 in this embodiment adopts a direct-lit light-emitting design. The backlight module 200 can use mini LED for light emission, or can use micro LED for light emission, or can also use general LED for light emission.

[0067] Specifically, the light source assembly 220 includes a lamp board 221 and lamp beads 222 disposed on the lamp board 221, and the lamp board 221 is disposed on the bottom board 211. The backlight module 200 further includes a rubber frame 201. The rubber frame 201 is connected to the side plate 212 of the bottom board 211, and a bearing platform 204 parallel to the bottom board 211 is provided inside the rubber frame 201. The optical film assembly 230, the nanoporous film 240, and the electrothermal film 260 are all disposed on the bearing platform 204. One end of the heat-conducting film layer 280 is disposed on the side of the lamp board 221 facing the lamp beads 222, that is, on the same side as the lamp board 221, and the remaining part of the heat-conducting film layer 280 is attached to the surface of the bearing platform 204 until it is connected to the electrothermal film 260.

[0068] Similarly, the related designs of the nanoporous film 240 and the electrothermal film 260 have been elaborated in detail in the above-mentioned multiple embodiments, and will not be elaborated here too much.

[0069] In the above design, the solutions in each embodiment can, to a certain extent, solve the problem that the penetration of current display products cannot be adjusted, and can improve the display effect of the display panel 100 and its competitiveness in the market.

[0070] The above content is a further detailed description of the present application in combination with specific optional embodiments. It cannot be determined that the specific implementation of the present application is only limited to these descriptions. For those of ordinary skill in the technical field to which the present application belongs, without departing from the concept of the present application, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present application.

Claims

1. A backlight module, characterized in that, it includes: a back plate; a light source component, disposed on the back plate; an optical film component, disposed on a side of the light source component away from the back plate; a light transmission adjustment film, disposed on a side of the optical film component facing the back plate, wherein a plurality of light transmission holes are provided in the light transmission adjustment film, and the aperture of the light transmission holes is adjustable; and an adjustment component, connected to the light transmission adjustment film, for adjusting the aperture of the light transmission holes; the light transmission adjustment film is a nanoporous film, the nanoporous film includes nanoparticles and polymer molecules, the size of the nanoparticles is smaller than the size of the polymer molecules, the nanoparticles are disposed in pores formed by adjacent polymer molecules, and voids between adjacent polymer molecules form the light transmission holes; the adjustment component is a temperature control component, the temperature control component is connected to the nanoporous film, and adjusts the temperature of the nanoporous film; the polymer molecules are composed of a temperature-sensitive material, and when the nanoporous film is heated, the polymer molecules contract, increasing the aperture of the light transmission holes.

2. The backlight module according to claim 1, characterized in that, the temperature control component includes a heating film and a temperature controller, the heating film is disposed on the surface of the nanoporous film, and the temperature controller is connected to the heating film to control the heat emitted by the heating film.

3. The backlight module according to claim 2, characterized in that, the heating film includes a plurality of sub-heating film parts, and the plurality of sub-heating film parts are arranged side by side at intervals on the surface of the nanoporous film, and the temperature controller is simultaneously connected to the plurality of sub-heating film parts to simultaneously control the temperatures of the plurality of sub-heating film parts; each sub-heating film part includes a plurality of cold film blocks and a plurality of hot film blocks, the temperature of the cold film blocks decreases when energized, the temperature of the hot film blocks increases when energized, and the cold film blocks and the hot film blocks are arranged alternately; the plurality of cold film blocks and the plurality of hot film blocks are all arranged side by side on the surface of the nanoporous film and are respectively connected to the temperature controller.

4. The backlight module according to claim 3, characterized in that, the heating film is disposed on a side of the optical film component facing the back plate, and the nanoporous film is disposed on a side of the heating film facing the back plate; both the nanoporous film and the heating film are in a strip structure arranged side by side, and the orthographic projection of the nanoporous film on the back plate overlaps with the orthographic projection of the heating film on the back plate.

5. The backlight module according to claim 3, characterized in that, the nanoporous film is disposed on a side of the optical film component facing the back plate, and the heating film is disposed on a side of the nanoporous film facing the back plate; the nanoporous film is a structure disposed entirely on the optical film component, and the surface area of the nanoporous film is equal to the surface area of the optical film component; the cold film blocks and the hot film blocks have the same shape, both are square, and in each sub-heating film part, adjacent cold film blocks are arranged diagonally, and adjacent hot film blocks are arranged diagonally; or The hot film block is annular, and the cold film block is circular. In the sub-electrothermal film part, the hot film blocks are sleeved on the cold film blocks one by one, and the hot film blocks are arranged side by side in the same direction.

6. The backlight module according to claim 2, characterized in that the temperature control component further includes a heat conduction film layer. One end of the heat conduction film layer is connected to the light source component, and the other end of the heat conduction film layer is connected to the electrothermal film, transferring the heat on the light source component to the electrothermal film.

7. The backlight module according to claim 6, characterized in that the back plate includes a bottom plate and a side plate, and the side plate is vertically arranged with respect to the edge of the bottom plate; the backlight module further includes a rubber frame, a light guide plate and a reflector. The reflector is arranged on the bottom plate, the light guide plate is arranged on the side of the reflector away from the bottom plate, the light source component is arranged on the side plate and is arranged opposite to the side of the light guide plate, and one end of the heat conduction film layer is arranged between the light source component and the side plate; the rubber frame is connected to the side plate, and a carrying platform parallel to the bottom plate is arranged inside the rubber frame. The carrying platform is located on the side of the light guide plate away from the bottom plate, the optical film sheet assembly is arranged on the carrying platform, and the heat conduction film layer is attached to the surface of the carrying platform.

8. The backlight module according to claim 6, characterized in that the back plate includes a bottom plate and a side plate, and the side plate is vertically arranged with respect to the edge of the bottom plate; the light source component includes a lamp board and lamp beads arranged on the lamp board, and the lamp board is arranged on the bottom plate; the backlight module further includes a rubber frame. The rubber frame is connected to the side plate, and a carrying platform parallel to the bottom plate is arranged inside the rubber frame. The optical film sheet assembly, the nanoporous film and the electrothermal film are all arranged on the carrying platform; one end of the heat conduction film layer is arranged on the side of the lamp board facing the lamp beads, and the other end of the heat conduction film layer is attached to the surface of the carrying platform and is connected to the electrothermal film.

9. A display device, characterized in that it includes a display panel and the backlight module according to any one of claims 1-8, and the backlight module provides backlight for the display panel.

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