Bundled optical fiber membrane, backlight module and display device

Abstract

The embodiment of the utility model provides a clustered optical fiber membrane, a backlight module and a display device. The clustered optical fiber membrane comprises a membrane body, the membrane body comprises a plurality of optical fibers and a bonding material for bonding the plurality of optical fibers together, and the bonding material comprises an adhesive and reflective particles dispersed in the adhesive. Therefore, a total reflection interface can be formed at the interface of the optical fiber and the adhesive material, an effect similar to an optical fiber is formed, and a part of light is totally reflected at the interface of the optical fiber and the adhesive material and finally is emitted along the extension direction of the optical fiber. And the other part of the light is refracted by the optical fiber and the adhesive and reflected by the reflecting particles, and finally is emitted from the light emitting surface of the beam concentration optical fiber film, and the angle of the light emitted from the beam concentration optical fiber film is converged to a certain range, so that the light concentration effect is realized.

Description

Technical Field

[0001] This application relates to the field of optics, and in particular to a bundled optical fiber film, a backlight module, and a display device. Background Technology

[0002] Liquid crystal displays (LCDs) have many advantages such as thinness, energy saving, and no radiation, and are widely used in mobile phones, personal digital assistants (PDAs), digital cameras, computer screens, and laptop screens.

[0003] Most LCD monitors on the market are backlit LCDs, which mainly consist of a backlight module and a liquid crystal panel mounted on the backlight module. A traditional LCD panel consists of a color filter substrate, a thin-film transistor array (TFT) substrate, and a liquid crystal layer disposed between the two substrates. Its working principle involves applying a driving voltage to the two glass substrates to control the rotation of the liquid crystal molecules in the liquid crystal layer, refracting the light from the backlight module to produce an image. Since the LCD panel itself does not emit light and requires a light source provided by the backlight module to display images properly, the backlight module is one of the key components of an LCD monitor.

[0004] However, due to the high divergence angle of the emitted light from the existing backlight module, LCD displays are prone to problems such as light leakage in dark states, color distortion caused by pixel crosstalk, and halos around text and / or patterns. Utility Model Content

[0005] Based on this, embodiments of this application provide a bundled optical fiber film, a backlight module, and a display device.

[0006] In a first aspect, embodiments of this application provide a bundled optical fiber membrane, the bundled optical fiber membrane comprising a membrane body, the membrane body comprising multiple optical fibers and an adhesive material for bonding the multiple optical fibers together, the adhesive material comprising an adhesive and reflective particles dispersed in the adhesive, wherein the refractive index of the optical fibers is greater than the refractive index of the adhesive.

[0007] In some embodiments, the refractive index of the optical fiber is 1.38 to 1.52; and / or,

[0008] The adhesive has a refractive index of 1.0 to 1.3; and / or,

[0009] The optical fiber is made of organic polymers.

[0010] In some embodiments, the organic polymer includes polypropylene, polyethylene terephthalate, or polystyrene; and / or,

[0011] The material of the reflective particles includes titanium dioxide or zirconium dioxide; and / or,

[0012] The average particle size of the reflective particles is 100 nm to 5 μm.

[0013] In some embodiments, the thickness of the membrane body is 300 μm to 3.0 mm; and / or,

[0014] The diameter of the optical fiber is 10 μm to 1000 μm; and / or,

[0015] The ratio of the length to the diameter of the optical fibers in the bundled optical fiber film is greater than or equal to 5; optionally, the ratio of the length to the diameter of the optical fibers in the bundled optical fiber film is greater than or equal to 10.

[0016] In some embodiments, the bundled optical fiber membrane further includes a first protective film disposed on the light-incident side of the membrane body; and / or,

[0017] The bundled optical fiber membrane also includes a second protective film, which is disposed on the light-emitting side of the membrane body.

[0018] In some embodiments, the surface of the second protective film near the film body and the surface away from the film body are both planar; or,

[0019] The surface of the second protective film near the membrane body is planar, and the surface of the second protective film away from the membrane body has a microstructure; and / or,

[0020] The thickness of the second protective film is 50 μm to 150 μm; and / or,

[0021] The thickness of the second protective film is 50μm to 150μm.

[0022] Secondly, embodiments of this application provide a backlight module, including the bundled optical fiber film as described above.

[0023] In some embodiments, the backlight module further includes a first light source and a light guide plate. The light guide plate has a first bottom surface and a first top surface disposed opposite to each other. The first light source is disposed on the side where the first bottom surface of the light guide plate is located, and the bundled optical fiber film is disposed on the side where the first top surface of the light guide plate is located.

[0024] In some embodiments, the backlight module further includes a second light source and a diffuser plate. The diffuser plate has a second bottom surface and a second top surface disposed opposite to each other, and a side surface connecting the second bottom surface and the second top surface. The second light source is disposed on the outer side of the side surface of the diffuser plate, and the bundled optical fiber film is disposed on the side where the second top surface of the diffuser plate is located.

[0025] Thirdly, embodiments of this application provide a display device including the backlight module as described above.

[0026] The bundled optical fiber film provided in this application includes a film body, which includes multiple optical fibers and an adhesive material that bonds the multiple optical fibers together. The adhesive material includes an adhesive and reflective particles dispersed in the adhesive. Since the refractive index of the optical fibers is greater than that of the adhesive, a total internal reflection interface can be formed at the interface between the optical fibers and the adhesive material, forming an effect similar to that of an optical fiber. Part of the light undergoes total internal reflection at the interface between the optical fibers and the adhesive material and is finally emitted along the extension direction of the optical fibers. Another part of the light is refracted by the optical fibers and the adhesive and reflected by the reflective particles before finally being emitted from the light-emitting surface of the bundled optical fiber film. Furthermore, the angle of the light emitted from the bundled optical fiber film converges to a certain range, achieving the effect of light focusing. When this bundled optical fiber film is applied to the backlight module of a liquid crystal display, it can avoid problems such as dark light leakage at a wide viewing angle due to light divergence, color distortion due to pixel crosstalk, and halos around text and / or patterns, thus improving the display effect and increasing the light output brightness of the liquid crystal display. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0028] Figure 1 This is a schematic diagram of the first structure of the bundled optical fiber membrane provided in the embodiments of this application.

[0029] Figure 2 This is a schematic diagram of a second structure of the bundled optical fiber membrane provided in an embodiment of this application.

[0030] Figure 3 This is a schematic diagram of a third structure of the bundled optical fiber membrane provided in an embodiment of this application.

[0031] Figure 4 A flowchart illustrating the method for preparing the bundled optical fiber membrane provided in this application embodiment.

[0032] Figure 5 This is a schematic diagram of a fiber bundle provided in an embodiment of this application.

[0033] Figure 6 This is a schematic diagram of cutting a fiber bundle according to an embodiment of this application.

[0034] Figure 7 This is a schematic diagram of a first structure of a backlight module provided in an embodiment of this application.

[0035] Figure 8 This is a schematic diagram of a second structure of the backlight module provided in an embodiment of this application.

[0036] Component symbol explanation:

[0037] 100. Bundled optical fiber membrane; 10. Membrane body; 11. Optical fiber; 12. Adhesive material; 21. First protective film; 22. Second protective film; 221. Microstructure; 80. Fiber bundle; 200. Backlight module; 31. First light source; 40. Light guide plate; 41. First bottom surface; 42. First top surface; 32. Second light source; 322. Circuit board; 321. Light-emitting device; 50. Diffuser plate; 51. Second bottom surface; 52. Second top surface; 60. Back plate; 61. Bottom plate; 62. Side plate; 63. Top plate; 71. Support frame; 72. Support column; 73. Foam tape; 90. Reflective sheet; 91. Horizontal part; 92. Inclined part. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0043] Please see Figure 1 , Figure 2 and Figure 3 This application provides a bundled optical fiber membrane 100, which includes a membrane body 10, the membrane body 10 including a plurality of optical fibers 11 and an adhesive material 12 for bonding the plurality of optical fibers 11 together, the adhesive material 12 including an adhesive and reflective particles dispersed in the adhesive, and the refractive index of the optical fibers 11 being greater than the refractive index of the adhesive.

[0044] It should be noted that the working principle of the bundled optical fiber membrane 100 in this application embodiment is as follows:

[0045] Since the refractive index of optical fiber 11 is greater than that of adhesive, a total internal reflection interface can be formed at the interface between optical fiber 11 and adhesive material 12, forming an effect similar to that of optical fiber.

[0046] When light enters the bundled optical fiber membrane 100, a portion of the light that enters the interior of the optical fiber 11 and meets the conditions for total internal reflection can undergo total internal reflection at the interface between the optical fiber 11 and the adhesive material 12 and finally exit along the extension direction of the optical fiber 11.

[0047] Some of the light rays that enter the optical fiber 11 but do not meet the conditions for total internal reflection will enter the adhesive material 12 and be refracted. When the refracted light rays are incident on the surface of the reflective particles, since the outer surface of the reflective particles is curved, the exit direction of the reflected light rays in different areas of the reflective particle surface is different when the parallel light beam is incident on the outer surface of the reflective particles, thereby changing the transmission direction of the light rays. Some of the light rays re-enter the optical fiber 11 and eventually exit along the extension direction of the optical fiber 11.

[0048] A portion of the light incident on the adhesive material is reflected by the reflective particles, changing its transmission direction, and eventually enters the optical fiber 11 and exits along the extension direction of the optical fiber 11.

[0049] It is understandable that because the adhesive material 12 contains reflective particles, the light transmittance of the adhesive material 12 is poor. That is to say, the light transmittance of the optical fiber 11 is much greater than that of the adhesive material 12. The light incident on the bundled optical fiber membrane 100 eventually exits mainly from the ends of the multiple optical fibers 11.

[0050] It should be noted that the angle between the transmission direction of the light emitted from the bundled optical fiber membrane 100 in this embodiment and the normal to the light-emitting surface of the bundled optical fiber membrane 100 is less than or equal to 30°. In other words, the light is effectively focused, achieving an effect close to collimated light.

[0051] For example, the refractive index of the optical fiber 11 is 1.38 to 1.52, such as 1.38, 1.40, 1.42, 1.45, 1.48, 1.50, 1.52, etc.

[0052] For example, the refractive index of the adhesive is 1.0 to 1.3, such as 1.0, 1.02, 1.05, 1.07, 1.1, 1.12, 1.15, 1.17, 1.2, 1.22, 1.25, 1.27, 1.3, etc.

[0053] For example, the material of the optical fiber 11 includes an organic polymer.

[0054] For example, the organic polymer includes polypropylene (PP), polyethylene terephthalate (PET), or polystyrene (PS).

[0055] For example, the adhesive material includes thermosetting resins, such as epoxy resins.

[0056] For example, the material of the reflective particles includes titanium dioxide (TiO2) or zirconium dioxide (ZrO2).

[0057] For example, the average particle size of the reflective particles is 100nm to 5μm, such as 100nm, 500nm, 1μm, 1.5μm, 2μm, 2.5μm, 3μm, 3.5μm, 4μm, 4.5μm, 5μm, etc.

[0058] For example, the mass percentage of the reflective particles in the adhesive material 12 is 1wt% to 70wt%, such as 1wt%, 5wt%, 10wt%, 15wt%, 20wt%, 25wt%, 30wt%, 35wt%, 40wt%, 45wt%, 50wt%, 55wt%, 60wt%, 65wt%, 70wt%, etc.

[0059] For example, the thickness of the membrane body 10 is 300μm to 3.0mm, such as 300μm, 400μm, 500μm, 600μm, 700μm, 800μm, 900μm, 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 2.2mm, 2.5mm, 2.8mm, 3mm, etc.

[0060] In some embodiments, the thickness of the membrane body 10 is 300 μm to 600 μm.

[0061] In other embodiments, the thickness of the membrane body 10 is 0.8 mm to 3.0 mm.

[0062] For example, the diameter of the optical fiber 11 is 10μm to 1000μm, such as 10μm, 50μm, 100μm, 150μm, 200μm, 250μm, 300μm, 350μm, 400μm, 450μm, 500μm, 550μm, 600μm, 650μm, 700μm, 750μm, 800μm, 850μm, 900μm, 950μm, 1000μm, etc.

[0063] For example, the length-to-diameter ratio of the optical fibers 11 in the bundled optical fiber film 100 is greater than or equal to 5; optionally, the length-to-diameter ratio of the optical fibers 11 in the bundled optical fiber film 100 is greater than or equal to 10.

[0064] For example, the ratio of the length to the diameter of the optical fiber 11 in the bundled optical fiber film 100 can be 5, 6, 7, 8, 9, 10, 12, 15, 18, 20, 22, 25, 28, 30, etc.

[0065] It should be noted that when the aspect ratio (length to diameter ratio) of the optical fiber 11 is larger, the focusing effect of the bundled optical fiber membrane 100 on light is better, and the collimation of the light emitted from the bundled optical fiber membrane 100 is higher.

[0066] For example, the ratio of the total mass of the plurality of optical fibers 11 to the mass of the membrane body 10 is 50wt% to 99.5wt%, such as 50wt%, 55wt%, 60wt%, 65wt%, 70wt%, 75wt%, 80wt%, 85wt%, 90wt%, 95wt%, 97wt%, 99.5wt%, etc.

[0067] Please see Figure 2 and Figure 3 The bundled optical fiber membrane 100 further includes a first protective film 21, which is disposed on the light-incident side of the membrane body 10.

[0068] Please see Figure 2 and Figure 3 The bundled optical fiber membrane 100 further includes a second protective membrane 22, which is disposed on the light-emitting side of the membrane body 10.

[0069] It is understandable that by setting the first protective film 21 and / or the second protective film 22, the membrane body 10 can be protected by the first protective film 21 and / or the second protective film 22, thereby improving the service life of the membrane body 10.

[0070] For example, the materials of the first protective film 21 and the second protective film 22 are both polymers, such as polyethylene terephthalate (PET).

[0071] Please see Figure 2 In some embodiments, the second protective film 22 has a planar surface on both the side closest to the film body 10 and the side furthest from the film body 10.

[0072] Please see Figure 3 In some embodiments, the surface of the second protective film 22 near the film body 10 is planar, and the surface of the second protective film 22 away from the film body 10 has microstructures 221.

[0073] It is understandable that by providing a microstructure 221 on the surface of the second protective film 22 away from the film body 10, the collimated light emitted from the bundled fiber film 100 can be appropriately diffused due to the light diffusion function of the microstructure 221, thereby expanding the viewing angle of the display device using the bundled fiber film 100.

[0074] For example, the thickness of the first protective film 21 is 50μm to 150μm, such as 50μm, 60μm, 70μm, 80μm, 90μm, 100μm, 110μm, 120μm, 130μm, 140μm, 150μm, etc.

[0075] For example, the thickness of the second protective film 22 is 50μm to 150μm, such as 50μm, 60μm, 70μm, 80μm, 90μm, 100μm, 110μm, 120μm, 130μm, 140μm, 150μm, etc.

[0076] It should be noted that when the surface of the second protective film 22 away from the film body 10 has microstructures 221, the thickness of the second protective film 22 refers to the average thickness of each region of the second protective film 22.

[0077] For example, the microstructure 221 includes at least one of a protruding structure and a recessed structure.

[0078] For example, the outer surface of the protruding structure can be an arc surface, or the outer surface of the recessed structure can be an arc surface.

[0079] For example, the protruding structure can be pyramidal, conical, frustum-shaped, or truncated cone-shaped, or the internal space of the recessed structure can be pyramidal, conical, frustum-shaped, or truncated cone-shaped.

[0080] The bundled optical fiber membrane 100 provided in this embodiment includes a membrane body 10, which includes multiple optical fibers 11 and an adhesive material 12 bonding the optical fibers 11 together. The adhesive material 12 includes an adhesive and reflective particles dispersed in the adhesive. Because the refractive index of the optical fibers 11 is greater than that of the adhesive, a total internal reflection interface can be formed at the interface between the optical fibers 11 and the adhesive material 12, creating an effect similar to that of an optical fiber. Part of the light undergoes total internal reflection at the interface between the optical fibers 11 and the adhesive material 12 and is ultimately emitted along the extension direction of the optical fibers 11. A portion of the light is refracted by the optical fiber 11 and the adhesive, and then reflected by the reflective particles before finally exiting from the light-emitting surface of the bundled optical fiber film 100. The angle of the light emitted from the bundled optical fiber film 100 converges to a certain range, achieving the effect of light focusing. When the bundled optical fiber film 100 is applied to the backlight module 200 of a liquid crystal display, it can avoid problems such as dark light leakage at a wide viewing angle due to light divergence, color distortion due to pixel crosstalk, and halos around text and / or patterns, thus improving the display effect and increasing the light output brightness of the liquid crystal display.

[0081] Please see Figure 4This application provides a method for preparing a bundled optical fiber membrane, used to prepare the bundled optical fiber membrane 100 in any of the above embodiments. The preparation method includes:

[0082] S100, please refer to Figure 5 The system provides multiple optical fibers 11 and an adhesive material 12, and uses the adhesive material 12 to bond the multiple optical fibers 11 together to obtain a fiber bundle 80.

[0083] For example, the optical fiber 11 is prepared by a drawing process.

[0084] Please see Figure 5 For example, the method of bonding multiple optical fibers 11 together using the adhesive material 12 to obtain a fiber bundle 80 includes:

[0085] The adhesive material 12 is coated on the outer surface of each optical fiber 11, and the adhesive material 12 is dried to obtain the first fiber;

[0086] Arrange multiple first fibers in the same direction to form a bundle;

[0087] The bundle is heated to cure the adhesive material 12 on the surface of the first fiber, thus obtaining the fiber bundle 80.

[0088] It is understood that the purpose of drying the adhesive material 12 is to evaporate the solvent in the adhesive material 12, so that the adhesive material 12 changes from a liquid state to a solid state.

[0089] For example, the adhesive material 12 can be dried by drying. For example, the drying temperature can be 60°C to 100°C (e.g., 60°C, 70°C, 80°C, 90°C, 100°C, etc.), and the drying time can be 5 minutes to 30 minutes (e.g., 5 minutes, 10 minutes, 15 minutes, 20 minutes, 25 minutes, 30 minutes, etc.).

[0090] It is understood that the first fiber includes optical fiber 11 and adhesive material 12 covering the outer surface of optical fiber 11. By drying the adhesive material 12, the outer surface of the first fiber is kept dry, which can prevent adhesion when multiple first fibers are arranged, resulting in inconsistent arrangement directions of multiple first fibers or uneven thickness of adhesive material 12 covering the outer surface of multiple first fibers.

[0091] For example, when the bundle is heated, the heating temperature is 100℃~150℃ (e.g. 100℃, 110℃, 120℃, 130℃, 140℃, 150℃, etc.), and the processing time is 5 minutes~30 minutes (e.g. 5 minutes, 10 minutes, 15 minutes, 20 minutes, 25 minutes, 30 minutes, etc.).

[0092] For example, while the bundle is being heated, pressure can also be applied to the bundle from the periphery to tightly connect multiple optical fibers 11, so as to avoid gaps between adjacent optical fibers 11 that could cause the bundled optical fiber film 100 to crack.

[0093] S200, please refer to Figure 6 The fiber bundle 80 is cut to obtain the membrane body 10, and the bundled optical fiber membrane 100 includes the membrane body 10.

[0094] Please combine Figure 2 and Figure 3 For example, after obtaining the membrane body 10, a first protective film 21 is provided on the light-incident side of the membrane body 10, and the bundled optical fiber membrane 100 includes the membrane body 10 and the first protective film 21.

[0095] Please see Figure 2 and Figure 3 After obtaining the membrane body 10, a second protective film 22 is provided on the light-emitting side of the membrane body 10. The bundled optical fiber membrane 100 includes the membrane body 10 and the second protective film 22.

[0096] Please see Figure 7 and Figure 8 This application provides a backlight module 200, which includes the bundled optical fiber film 100 in any of the above embodiments or the bundled optical fiber film 100 prepared by the preparation method of the bundled optical fiber film 100 in any of the above embodiments.

[0097] It should be noted that, since the bundled optical fiber film 100 provided in this application embodiment has the effect of focusing light and thus can improve the brightness of the emitted light, the bundled optical fiber film 100 can replace the brightness enhancement film in the optical film assembly of the backlight module 200.

[0098] Please see Figure 7 When the backlight module 200 is a side-lit backlight module, the backlight module 200 further includes a first light source 31 and a light guide plate 40. The light guide plate 40 has a first bottom surface 41 and a first top surface 42 that are disposed opposite to each other. The first light source 31 is disposed on the side where the first bottom surface 41 of the light guide plate 40 is located, and the bundled optical fiber film 100 is disposed on the side where the first top surface 42 of the light guide plate 40 is located.

[0099] Please see Figure 8 When the backlight module 200 is a direct-lit backlight module, the backlight module 200 further includes a second light source 32 and a diffuser plate 50. The diffuser plate 50 has a second bottom surface 51 and a second top surface 52 disposed opposite to each other, and a side surface connecting the second bottom surface 51 and the second top surface 52. The second light source 32 is disposed on the outer side of the side surface of the diffuser plate 50, and the bundled optical fiber film 100 is disposed on the side where the second top surface 52 of the diffuser plate 50 is located.

[0100] Please see Figure 8 The backlight module 200 also includes a back plate 60 and a support frame 71. The back plate 60 includes a bottom plate 61 and a side plate 62 connected together. The support frame 71 is connected to the side plate 62 and is used to support the diffuser plate 50 and the bundled optical fiber film 100. The second light source 32 is disposed on the bottom plate 61.

[0101] Please see Figure 8 The back plate 60 may also include a top plate 63, which is disposed opposite to the bottom plate 61. The top plate 63 is connected to the side of the side plate 62 away from the bottom plate 61. The top plate 63 and the bundled optical fiber film 100 can be connected by foam tape 73.

[0102] Please see Figure 8 The second light source 32 includes a circuit board 322 and a light-emitting device 321 connected to the circuit board 322. The light-emitting device 321 is located on the side of the circuit board 322 away from the base plate 61.

[0103] For example, the light-emitting device 321 is an LED (light-emitting diode), such as a MiniLED.

[0104] Please see Figure 8 The backlight module 200 also includes a support column 72, one end of which is fixedly connected to the circuit board 322, and the other end abuts against the diffuser plate 50.

[0105] Understandably, by setting the support column 72, the light mixing distance of the backlight module 200 (the distance from the light source to the diffuser plate 50) can be limited, so that the light is diffused and mixed before being emitted from the diffuser plate 50, thereby improving the light emission uniformity of the backlight module 200.

[0106] Please see Figure 8The backlight module 200 further includes a reflective sheet 90, which includes a horizontal portion 91 and an inclined portion 92. The included angle between the horizontal portion 91 and the inclined portion 92 is an obtuse angle. The horizontal portion 91 is disposed on the circuit board 322 and has a hollow area. The light-emitting device 321 is located in the hollow area. One side of the inclined portion 92 is connected to the horizontal portion 91, and the other side is connected to the support frame 71.

[0107] Understandably, by setting the reflector 90, the light utilization rate can be improved, thereby increasing the light output efficiency of the backlight module 200.

[0108] This application embodiment also provides a display device, including the backlight module 200 as described above.

[0109] For example, the display device further includes a display panel, and a backlight module 200 is disposed on the light-incident side of the display panel.

[0110] For example, the display panel is a liquid crystal display panel.

[0111] For example, the display device can be a terminal such as a television, computer monitor, mobile phone, or tablet computer, or it can be a device with a display screen such as a gaming device, augmented reality (AR) device, virtual reality (VR) device, data storage device, audio playback device, video playback device, or wearable device. Wearable devices can be smart bracelets, smart glasses, smartwatches, smart decorations, etc.

[0112] The bundled optical fiber film, backlight module, and display device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application, and the descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A bundled optical fiber membrane, characterized in that, The bundled optical fiber membrane includes a membrane body, which includes multiple optical fibers and an adhesive that bonds the multiple optical fibers together. The adhesive contains reflective particles, and the refractive index of the optical fibers is greater than the refractive index of the adhesive.

2. The bundled optical fiber membrane according to claim 1, characterized in that, The refractive index of the optical fiber is 1.38 to 1.52; and / or, The adhesive has a refractive index of 1.0 to 1.3; and / or, The optical fiber is made of organic polymers.

3. The bundled optical fiber membrane according to claim 2, characterized in that, The organic polymer includes polypropylene, polyethylene terephthalate, or polystyrene; and / or, The material of the reflective particles includes titanium dioxide or zirconium dioxide; and / or, The average particle size of the reflective particles is 100 nm to 5 μm.

4. The bundled optical fiber membrane according to claim 1, characterized in that, The thickness of the membrane body is 300 μm to 3.0 mm; and / or, The diameter of the optical fiber is 10 μm to 1000 μm; and / or, The ratio of the length to the diameter of the optical fibers in the bundled optical fiber film is greater than or equal to 5; optionally, the ratio of the length to the diameter of the optical fibers in the bundled optical fiber film is greater than or equal to 10.

5. The bundled optical fiber membrane according to claim 1, characterized in that, The bundled optical fiber membrane further includes a first protective film, which is disposed on the light-incident side of the membrane body; and / or, The bundled optical fiber membrane also includes a second protective film, which is disposed on the light-emitting side of the membrane body.

6. The bundled optical fiber membrane according to claim 5, characterized in that, The second protective film has a planar surface on both the side closest to the film body and the side furthest from the film body; or, The surface of the second protective film near the membrane body is planar, and the surface of the second protective film away from the membrane body has a microstructure; and / or, The thickness of the second protective film is 50μm to 150μm.

7. A backlight module, characterized in that, Includes the bundled optical fiber membrane as described in any one of claims 1-6.

8. The backlight module according to claim 7, characterized in that, The backlight module further includes a first light source and a light guide plate. The light guide plate has a first bottom surface and a first top surface that are disposed opposite to each other. The first light source is disposed on the side where the first bottom surface of the light guide plate is located, and the bundled optical fiber film is disposed on the side where the first top surface of the light guide plate is located.

9. The backlight module according to claim 7, characterized in that, The backlight module further includes a second light source and a diffuser plate. The diffuser plate has a second bottom surface and a second top surface disposed opposite to each other, and a side surface connecting the second bottom surface and the second top surface. The second light source is disposed on the outside of the side surface of the diffuser plate, and the bundled optical fiber film is disposed on the side where the second top surface of the diffuser plate is located.

10. A display device, characterized in that, Includes the backlight module as described in any one of claims 8-9.

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