Electronic paper display device

Abstract

The application discloses an electronic paper display device, which comprises a substrate, an electronic paper display module, a power management module and a friction nanogenerator. The power management module is located between the substrate and the electronic paper display module. The friction nanogenerator is located between the substrate and the electronic paper display module, and a part of the friction nanogenerator exceeds the edge of the electronic paper display module. The friction nanogenerator comprises a first friction layer, a second friction layer and a rotating shaft. The first friction layer is located on the side of the second friction layer close to the electronic paper display module. The rotating shaft is rotatably installed on the substrate. The rotating shaft is connected with one of the first friction layer and the second friction layer. A part of the friction layer connected with the rotating shaft among the first friction layer and the second friction layer exceeds the edge of the electronic paper display module. The application can reduce the volume of the electronic paper display device, so as to realize the light and thin of the electronic paper display device.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically to an electronic paper display device. Background Technology

[0002] Electronic paper displays have significant application prospects in various fields due to their advantages such as low power consumption and high contrast. Electronic paper displays require a power source to function, but this can make them less convenient to use. Therefore, conventional electronic paper displays incorporate triboelectric nanogenerators to power them. However, because these generators are externally mounted, this increases the size of the electronic paper display, making it difficult to achieve a thinner and lighter design. Utility Model Content

[0003] The embodiments of this application provide an electronic paper display device that can reduce the size of the electronic paper display device to achieve a thinner and lighter electronic paper display device.

[0004] Embodiments of this application provide an electronic paper display device, comprising: substrate; An electronic paper display module, wherein the electronic paper display module is disposed on the substrate; A power management module is disposed on the substrate, located between the substrate and the electronic paper display module, and electrically connected to the electronic paper display module. A triboelectric nanogenerator is disposed on the substrate and located between the substrate and the electronic paper display module, with a portion of the triboelectric nanogenerator extending beyond the edge of the electronic paper display module. The triboelectric nanogenerator is electrically connected to the power management module. The triboelectric nanogenerator includes a first friction layer, a second friction layer, and a rotating shaft. The first friction layer is located on the side of the second friction layer closer to the electronic paper display module. The rotating shaft is rotatably mounted on the substrate and connected to one of the first and second friction layers. A portion of the first and second friction layers connected to the rotating shaft extends beyond the edge of the electronic paper display module.

[0005] Furthermore, the first friction layer is connected to the electronic paper display module, and the second friction layer is connected to the rotating shaft.

[0006] Furthermore, the triboelectric nanogenerator also includes a third friction layer, which is disposed on a surface of the first friction layer away from the electronic paper display module.

[0007] Furthermore, the triboelectric nanogenerator also includes a fourth friction layer, which is disposed on a surface of the second friction layer near the electronic paper display module, and the fourth friction layer is connected to the rotating shaft.

[0008] Furthermore, the second friction layer is connected to the substrate, and the second friction layer is provided with a first opening, wherein one end of the rotating shaft passes through the first opening and is connected to the first friction layer.

[0009] Furthermore, the triboelectric nanogenerator also includes a fifth friction layer, which is disposed on a surface of the second friction layer near the electronic paper display module. The fifth friction layer has a second opening, wherein one end of the rotating shaft passes through the first opening and the second opening and is connected to the first friction layer.

[0010] Furthermore, the triboelectric nanogenerator also includes a first electrode layer and a second electrode layer. The first electrode layer is disposed on a surface of the first friction layer near the electronic paper display module, and the second electrode layer is disposed on a surface of the second friction layer away from the electronic paper display module. Both the first electrode layer and the second electrode layer are electrically connected to the power management module.

[0011] Furthermore, there is a gap between the first friction layer and the second friction layer, and the gap is no greater than 3 mm.

[0012] Furthermore, a surface of the first friction layer away from the electronic paper display module contacts a surface of the second friction layer close to the electronic paper display module.

[0013] Furthermore, the electronic paper display device also includes an insulating layer disposed on a surface of the electronic paper display module near the substrate.

[0014] The beneficial effects of this application are: This application provides an electronic paper display device. The electronic paper display device includes a substrate, an electronic paper display module, a power management module, and a triboelectric nanogenerator. The power management module is disposed on the substrate, located between the substrate and the electronic paper display module, and electrically connected to the electronic paper display module. The triboelectric nanogenerator is disposed on the substrate, located between the substrate and the electronic paper display module, with a portion of the triboelectric nanogenerator extending beyond the edge of the electronic paper display module. The triboelectric nanogenerator is electrically connected to the power management module. The triboelectric nanogenerator includes a first friction layer, a second friction layer, and a rotating shaft. The first friction layer is located on the side of the second friction layer closer to the electronic paper display module. The rotating shaft is rotatably mounted on the substrate, and the rotating shaft is connected to both the first and second friction layers. One of the friction layers is connected, and a portion of the friction layer connected to the rotating shaft in the first friction layer and the second friction layer extends beyond the edge of the electronic paper display module; that is, in the technical solution of this application, since a portion of the friction layer connected to the rotating shaft in the first friction layer and the second friction layer extends beyond the edge of the electronic paper display module, it is ensured that by rotating the portion of the friction layer connected to the rotating shaft and extending beyond the electronic paper display module, the triboelectric nanogenerator can generate current to power the electronic paper display module, thereby realizing the display function of the electronic paper display device. Furthermore, since the triboelectric nanogenerator and the power management module are set on the backlight side of the electronic paper display module, the triboelectric nanogenerator, the power management module and the electronic paper display module are integrated into a single structure. Compared with the conventional solution of setting the triboelectric nanogenerator externally, it does not increase the volume of the electronic paper display device, thus achieving the thinness and lightness of the electronic paper display device. Attached Figure Description

[0015] Figure 1 This is a top view of the electronic paper display device of this application; Figure 2 This is an exploded view of the electronic paper display device of this application; Figure 3 This is a schematic diagram of the internal structure of the electronic paper display device of this application; Figure 4 This is a schematic diagram of the electronic paper display device of this application; Figure 5 This is a schematic diagram of the first structure of the electronic paper display device of this application; Figure 6 This is a schematic diagram of a second structure of the electronic paper display device of this application; Figure 7 This is a schematic diagram of a third structure of the electronic paper display device of this application; Figure 8 This is a schematic diagram of the fourth structure of the electronic paper display device of this application; Figure 9 This is a schematic diagram of the fifth structure of the electronic paper display device of this application; Figure 10 This is a schematic diagram of the sixth structure of the electronic paper display device of this application; Figure 11 This is a schematic diagram of the seventh structure of the electronic paper display device of this application; Figure 12 This is a schematic diagram of the eighth structure of the electronic paper display device of this application; Figure 13 This is a schematic diagram of the first friction layer of the electronic paper display device of this application; Figure 14 This is a schematic diagram of the second friction layer of the electronic paper display device of this application; Figure 15 This is a schematic diagram of the structure of the electronic paper display device of this application when the first friction layer and the second friction layer are misaligned.

[0016] Explanation of reference numerals in the attached figures: 10-Electronic paper display device; 100-Substrate; 200-Electronic paper display module; 300-Power management module; 310-Rectifier module; 320-Step-down module; 330-Voltage regulator module; 340-Control module; 400-Triboelectric nanogenerator; 410-First friction layer; 411-First blade; 420-Second friction layer; 421-First opening; 422-Second blade; 430-Shaft; 440-Third friction layer; 450-Fourth friction layer; 460-Fifth friction layer; 461-Second opening; 470-First electrode layer; 480-Second electrode layer; 500-Insulating layer; 600-Energy storage module. Detailed Implementation

[0017] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings. The technical solutions described below are for illustrative purposes only and should not be construed as limiting the scope of protection of this application.

[0018] Furthermore, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different technical features. The terms "multiple" and similar words indicate two or more unless otherwise expressly specified.

[0019] The first embodiment of this application provides a first type of electronic paper display device 10, see reference. Figures 1-5The electronic paper display device 10 includes a substrate 100, an electronic paper display module 200, a power management module 300, and a triboelectric nanogenerator 400. The electronic paper display module 200 is disposed on the substrate 100. The power management module 300 is disposed on the substrate 100, located between the substrate 100 and the electronic paper display module 200, and electrically connected to the electronic paper display module 200. The triboelectric nanogenerator 400 is disposed on the substrate 100, located between the substrate 100 and the electronic paper display module 200, and a portion of the triboelectric nanogenerator 400 extends beyond the edge of the electronic paper display module 200. The device is electrically connected to the power management module 300. The triboelectric nanogenerator 400 includes a first friction layer 410, a second friction layer 420, and a rotating shaft 430. The first friction layer 410 is located on the side of the second friction layer 420 near the electronic paper display module 200. The rotating shaft 430 is rotatably mounted on the substrate 100. The rotating shaft 430 is connected to one of the first friction layer 410 and the second friction layer 420, and a portion of the friction layer connected to the rotating shaft 430 in the first friction layer 410 and the second friction layer 420 extends beyond the edge of the electronic paper display module 200. Specifically, the first friction layer 410 is connected to the electronic paper display module 200, and the second friction layer 420 is connected to the rotating shaft 430.

[0020] The electronic paper display device 10 requires a power source to perform its display function. However, this makes the electronic paper display device 10 less convenient to use. Therefore, conventional electronic paper display devices 10 incorporate a triboelectric nanogenerator 400 to power the device. However, because the triboelectric nanogenerator 400 is externally mounted, it increases the size of the electronic paper display device 10. Therefore, this application provides a display device that includes an electronic paper display device 10 comprising a substrate 100, an electronic paper display module 200, a power management module 300, and a triboelectric nanogenerator 400. The power management module 300 is mounted on the substrate 100, located between the substrate 100 and the electronic paper display module 200, and electrically connected to the electronic paper display module 200. The triboelectric nanogenerator 400 is mounted on the substrate 100, located between the substrate 100 and the electronic paper display module 200. Between the electronic paper display modules 200, a portion of the triboelectric nanogenerator 400 extends beyond the edge of the electronic paper display module 200. The triboelectric nanogenerator 400 is electrically connected to the power management module 300. The triboelectric nanogenerator 400 includes a first friction layer 410, a second friction layer 420, and a rotating shaft 430. The first friction layer 410 is located on the side of the second friction layer 420 closer to the electronic paper display module 200. The rotating shaft 430 is rotatably mounted on the substrate 100. The rotating shaft 430 is connected to the first friction layer 410 and the second friction layer 420. One of the friction layers 420 is connected, and a portion of the friction layer 410 and the second friction layer 420 connected to the rotating shaft 430 extends beyond the edge of the electronic paper display module 200. Specifically, the first friction layer 410 is connected to the electronic paper display module 200, and the second friction layer 420 is connected to the rotating shaft 430. That is, in the technical solution of this application, because a portion of the friction layer 410 and the second friction layer 420 connected to the rotating shaft 430 extends beyond the edge of the electronic paper display module 200, it is ensured that the second friction layer 420 can be rotated. The current generated extends beyond a portion of the electronic paper display module 200 to power the electronic paper display module 200, thereby enabling the display function of the electronic paper display device 10. Furthermore, since the triboelectric nanogenerator 400 and the power management module 300 are located on the backlight side of the electronic paper display module 200, the triboelectric nanogenerator 400, the power management module 300, and the electronic paper display module 200 are integrated into a single structure. Compared to the conventional solution of setting the triboelectric nanogenerator 400 externally, this does not increase the volume of the electronic paper display device 10, thus achieving a thinner and lighter electronic paper display device 10.

[0021] It should be noted that the triboelectric nanogenerator 400 utilizes Maxwell's displacement current principle to directly convert mechanical energy in the environment (such as contact separation, sliding, pressing, and vibration) into electrical energy through the synergistic effect of triboelectric charging and electrostatic induction.

[0022] In this embodiment, reference Figures 13-15 The first friction layer 410 includes a plurality of first blades, and the second friction layer 420 includes a plurality of second blades. The plurality of first blades are arranged circumferentially with the rotation axis 430 as the central axis, and the plurality of second blades are arranged circumferentially with the rotation axis 430 as the central axis. When the second friction layer 420 rotates with the rotation axis 430 as the central axis, the plurality of second blades and the plurality of first blades can overlap or be misaligned.

[0023] In this embodiment, the relationship between the number of the first fan blades and the angle of the first fan blades is N1 = 180° / θ1, and the relationship between the number of the second fan blades and the angle of the second fan blades is N2 = 180° / θ2, where N1 and N2 are positive integers, θ1 is the central angle of the first fan blade, and θ2 is the central angle of the second fan blade. Preferably, the angle of θ1 is 22.5°, 45°, or 90°, and the angle of θ2 is 22.5°, 45°, or 90°.

[0024] In this embodiment, the number of the first fan blades is equal to the number of the second fan blades.

[0025] During operation, the first friction layer 410 and the second friction layer 420 will cycle from overlapping to misalignment and back to overlapping again as the second friction layer 420 rotates. During this process, the first friction layer 410 and the second friction layer 420 generate different charge-driven voltages, thereby generating periodic pulse currents.

[0026] In this embodiment, the material of the first friction layer 410 is a conductive metal, a conductive polymer, or a conductive inorganic material.

[0027] Specifically, the material of the first friction layer 410 is polyaniline (PANI), polystyrene (PS), polystyrene-poly(ethylene-butene)-polystyrene block copolymer (SEBS), polyamide (nylon), polyethylene glycol succinate, polyurethane elastomer (PU), polyethylene terephthalate (PET), polyimide (PI), polyethylene glycol adipate, cotton fabric, silk, paper, wool, polymethyl methacrylate (PMMA), polylactic acid (PLA), aluminum (Al), copper (Cu), strontium titanate (STO) electrospun film, etc. At least one of the following: tetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polydimethylsiloxane (PDMS), polyvinyl chloride (PVC), polychlorotrifluoroethylene (PCTFE), polytetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (PFA), polyhexafluoropropylene (FEP), ethyl cellulose, nitrile rubber (NBR), polyoxymethylene, polyvinyl chloride, polycarbonate, carbon nanotubes (CNTs), graphene, conductive polymer (PEDOT:PSS), and composite ceramic materials (zinc oxide, silicon dioxide).

[0028] In this embodiment, the material of the second friction layer 420 is a conductive metal, a conductive polymer, or a conductive inorganic material.

[0029] Specifically, the material of the second friction layer 420 is polyaniline (PANI), polystyrene (PS), polystyrene-poly(ethylene-butene)-polystyrene block copolymer (SEBS), polyamide (nylon), polyethylene glycol succinate, polyurethane elastomer (PU), polyethylene terephthalate (PET), polyimide (PI), polyethylene glycol adipate, cotton fabric, silk, paper, wool, polymethyl methacrylate (PMMA), polylactic acid (PLA), aluminum (Al), copper (Cu), strontium titanate (STO) electrospun film, etc. At least one of the following: tetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polydimethylsiloxane (PDMS), polyvinyl chloride (PVC), polychlorotrifluoroethylene (PCTFE), polytetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (PFA), polyhexafluoropropylene (FEP), ethyl cellulose, nitrile rubber (NBR), polyoxymethylene, polyvinyl chloride, polycarbonate, carbon nanotubes (CNTs), graphene, conductive polymer (PEDOT:PSS), and composite ceramic materials (zinc oxide, silicon dioxide).

[0030] In this embodiment, the material of the first friction layer 410 is different from the material of the second friction layer 420.

[0031] In this embodiment, reference Figure 4The electronic paper display device 10 further includes an energy storage module 600, which is disposed on the substrate 100 and located between the substrate 100 and the electronic paper display module 200. The energy storage module 600 is electrically connected to the power management module 300. By including an energy storage module 600 on the substrate 100 and located between the substrate 100 and the electronic paper display module 200, and electrically connected to the power management module 300, the energy storage module 600 can store the electrical energy generated by the triboelectric nanogenerator 400 and power the electronic paper display module 200, thus improving the ease of use of the electronic paper display device 10. Furthermore, since the energy storage module 600 is located between the substrate 100 and the electronic paper display module 200, it is integrated inside the electronic paper display device 10, without increasing the volume of the device, thereby improving its integration and facilitating its thinner and lighter design.

[0032] In this embodiment, the power management module 300 includes a rectifier module 310, a buck module 320, a voltage regulator module 330, and a control module 340. The input terminal of the rectifier module 310 is electrically connected to the triboelectric nanogenerator 400. The input terminal of the buck module 320 is electrically connected to the output terminal of the rectifier module 310. The input terminal of the voltage regulator module 330 is electrically connected to the buck module 320. The output terminal of the voltage regulator module 330 is electrically connected to the energy storage module 600 and the electronic paper display module 200. The control module 340 is electrically connected to the output terminals of the rectifier module 310 and the voltage regulator module 330. The power management module 300 includes a rectifier module 310, a step-down module 320, a voltage regulator module 330, and a control module 340. The input terminal of the rectifier module 310 is electrically connected to the triboelectric nanogenerator 400. The input terminal of the step-down module 320 is electrically connected to the output terminal of the rectifier module 310. The input terminal of the voltage regulator module 330 is electrically connected to the step-down module 320. The output terminal of the voltage regulator module 330 is electrically connected to the energy storage module 600 and the electronic paper display module 200. The control module 340 is electrically connected to the output terminals of the rectifier module 310 and the voltage regulator module 330. The rectifier module 310 can rectify the electrical output of the triboelectric nanogenerator 400, converting it into DC power that can be processed by subsequent modules. The step-down module 320 and the voltage regulator module 330 play the role of voltage conversion and stabilization, enabling the electrical energy generated by the triboelectric nanogenerator 400 to be safely charged and discharged.

[0033] In this embodiment, the shaft 430 of the triboelectric nanogenerator 400 is electrically connected to the power management module 300.

[0034] In this embodiment, reference Figure 5 The first friction layer 410 and the second friction layer 420 have a spacing d, which is no greater than 3 mm. By setting a spacing d between the first friction layer 410 and the second friction layer 420, and the spacing d being no greater than 3 mm, it is possible to avoid the performance degradation of the triboelectric nanogenerator 400 if the spacing d between the first friction layer 410 and the second friction layer 420 is too large. Preferably, the spacing d is 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, or 3.0 mm.

[0035] In this embodiment, a surface of the first friction layer 410 away from the electronic paper display module 200 contacts a surface of the second friction layer 420 close to the electronic paper display module 200.

[0036] In this embodiment, reference Figure 12 The electronic paper display device 10 further includes an insulating layer 500, which is disposed on a surface of the electronic paper display module near the substrate 100. By including the insulating layer 500 on the surface of the electronic paper display module near the substrate 100, the insulating layer 500 can isolate the triboelectric nanogenerator 400 from the electronic paper display module 200, preventing the charge generated by the triboelectric nanogenerator 400 from interfering with the electronic paper display module 200, thereby improving the stability of the display image of the electronic paper display device 10.

[0037] The second embodiment of this application provides a second type of electronic paper display device 10. The second embodiment is similar to the first embodiment, but differs from the first embodiment in that, as described in the reference... Figure 6The triboelectric nanogenerator 400 further includes a third friction layer 440, which is disposed on the surface of the first friction layer 410 away from the electronic paper display module 200. By including the third friction layer 440 on the surface of the first friction layer 410 away from the electronic paper display module 200, when the second friction layer 420 rotates, the second friction layer 420 can overlap or misalign with the first friction layer 410 and the third friction layer 440, which is beneficial to improving the performance of the electronic paper display device 10.

[0038] In this embodiment, from a top-down view of the electronic paper display device 10, the third friction layer 440 overlaps with the first friction layer 410.

[0039] It is understood that, from the perspective of looking down at the electronic paper display device 10, the third friction layer 440 overlaps with the first friction layer 410, that is, the third friction layer 440 and the first friction layer 410 have the same structure. The third friction layer 440 has a plurality of third blades, and the number of third blades is the same as the number of first blades, and the central angle of the third blades is equal to the central angle of the first blades.

[0040] In this embodiment, the material of the third friction layer 440 is a conductive metal, a conductive polymer, or a conductive inorganic material.

[0041] Specifically, the material of the third friction layer 440 is polyaniline (PANI), polystyrene (PS), polystyrene-poly(ethylene-butene)-polystyrene block copolymer (SEBS), polyamide (nylon), polyethylene glycol succinate, polyurethane elastomer (PU), polyethylene terephthalate (PET), polyimide (PI), polyethylene glycol adipate, cotton fabric, silk, paper, wool, polymethyl methacrylate (PMMA), polylactic acid (PLA), aluminum (Al), copper (Cu), strontium titanate (STO) electrospun film, etc. At least one of the following: tetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polydimethylsiloxane (PDMS), polyvinyl chloride (PVC), polychlorotrifluoroethylene (PCTFE), polytetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (PFA), polyhexafluoropropylene (FEP), ethyl cellulose, nitrile rubber (NBR), polyoxymethylene, polyvinyl chloride, polycarbonate, carbon nanotubes (CNTs), graphene, conductive polymer (PEDOT:PSS), and composite ceramic materials (zinc oxide, silicon dioxide).

[0042] In this embodiment, the material of the third friction layer 440 is different from the material of the first friction layer 410.

[0043] In this embodiment, the shaft 430 of the triboelectric nanogenerator 400 is electrically connected to the power management module 300.

[0044] The third embodiment of this application provides a third type of electronic paper display device 10. The third embodiment is similar to the first embodiment, but differs from the first embodiment in that, in reference to... Figure 7 The triboelectric nanogenerator 400 further includes a fourth friction layer 450, which is disposed on the surface of the second friction layer 420 near the electronic paper display module 200 and is connected to the rotating shaft 430. By including the fourth friction layer 450 in the triboelectric nanogenerator 400, which is disposed on the surface of the second friction layer 420 near the electronic paper display module 200 and connected to the rotating shaft 430, when the fourth friction layer 450 and the second friction layer 420 rotate, the first friction layer 410 can overlap or misalign with the second friction layer 420 and the fourth friction layer 450, which is beneficial to improving the performance of the electronic paper display device 10.

[0045] In this embodiment, from a top-down view of the electronic paper display device 10, the second friction layer 420 overlaps with the fourth friction layer 450.

[0046] It is understood that, from the perspective of looking down at the electronic paper display device 10, the fourth friction layer 450 overlaps with the second friction layer 420, that is, the fourth friction layer 450 and the second friction layer 420 have the same structure. The fourth friction layer 450 has a plurality of fourth blades, and the number of fourth blades is the same as the number of second blades, and the central angle of the fourth blades is equal to the central angle of the second blades.

[0047] In this embodiment, the material of the fourth friction layer 450 is a conductive metal, a conductive polymer, or a conductive inorganic material.

[0048] Specifically, the material of the fourth friction layer 450 is polyaniline (PANI), polystyrene (PS), polystyrene-poly(ethylene-butene)-polystyrene block copolymer (SEBS), polyamide (nylon), polyethylene glycol succinate, polyurethane elastomer (PU), polyethylene terephthalate (PET), polyimide (PI), polyethylene glycol adipate, cotton fabric, silk, paper, wool, polymethyl methacrylate (PMMA), polylactic acid (PLA), aluminum (Al), copper (Cu), strontium titanate (STO) electrospun film, etc. At least one of the following: tetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polydimethylsiloxane (PDMS), polyvinyl chloride (PVC), polychlorotrifluoroethylene (PCTFE), polytetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (PFA), polyhexafluoropropylene (FEP), ethyl cellulose, nitrile rubber (NBR), polyoxymethylene, polyvinyl chloride, polycarbonate, carbon nanotubes (CNTs), graphene, conductive polymer (PEDOT:PSS), and composite ceramic materials (zinc oxide, silicon dioxide).

[0049] In this embodiment, the material of the fourth friction layer 450 is different from the material of the second friction layer 420. In this embodiment, the shaft 430 of the triboelectric nanogenerator 400 is electrically connected to the power management module 300.

[0050] The fourth embodiment of this application provides a fourth type of electronic paper display device 10. The fourth embodiment is similar to the first embodiment, but differs from the first embodiment in that, in reference to... Figure 8 The triboelectric nanogenerator 400 further includes a first electrode layer 470 and a second electrode layer 480. The first electrode layer 470 is disposed on a surface of the first friction layer 410 near the electronic paper display module 200, and the second electrode layer 480 is disposed on a surface of the second friction layer 420 away from the electronic paper display module 200. Both the first electrode layer 470 and the second electrode layer 480 are electrically connected to the power management module 300. The triboelectric nanogenerator 400 further includes a first electrode layer 470 and a second electrode layer 480. The first electrode layer 470 is disposed on a surface of the first friction layer 410 near the electronic paper display module 200, and the second electrode layer 480 is disposed on a surface of the second friction layer 420 away from the electronic paper display module 200. Both the first electrode layer 470 and the second electrode layer 480 are electrically connected to the power management module 300. The first electrode layer 470 and the second electrode layer 480 can concentrate charges, thereby improving the output performance of the triboelectric nanogenerator 400 and ensuring that the display screen of the electronic paper display device 10 is more stable.

[0051] In this embodiment, the material of the first electrode layer 470 is a conductive metal, a conductive polymer, or a conductive inorganic material.

[0052] Specifically, the conductive metal can be copper or aluminum, the conductive polymer can be PEDOT:PSS, and the conductive inorganic material can be graphene.

[0053] It is understood that in this embodiment, both the first electrode layer 470 and the second electrode layer 480 are electrically connected to the power management module 300. Therefore, in the fourth embodiment, it is not necessary to electrically connect the rotating shaft 430 to the triboelectric nanogenerator 400.

[0054] It is understood that in the first to fourth embodiments, different embodiments can be combined with each other to form new embodiments.

[0055] The fifth embodiment of this application provides a fifth type of electronic paper display device 10, see reference. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 9 The electronic paper display device 10 includes a substrate 100, an electronic paper display module 200, a power management module 300, and a triboelectric nanogenerator 400. The electronic paper display module 200 is disposed on the substrate 100. The power management module 300 is disposed on the substrate 100, located between the substrate 100 and the electronic paper display module 200, and electrically connected to the electronic paper display module 200. The triboelectric nanogenerator 400 is disposed on the substrate 100, located between the substrate 100 and the electronic paper display module 200, with a portion of the triboelectric nanogenerator extending beyond the edge of the electronic paper display module 200, and electrically connected to the power management module 300. Next, the triboelectric nanogenerator 400 includes a first friction layer 410, a second friction layer 420, and a rotating shaft 430. The first friction layer 410 is located on the side of the second friction layer 420 near the electronic paper display module 200. The rotating shaft 430 is rotatably mounted on the substrate 100. The rotating shaft 430 is connected to one of the first friction layer 410 and the second friction layer 420, and a portion of the friction layer connected to the rotating shaft 430 extends beyond the edge of the electronic paper display module 200. Specifically, the second friction layer 420 is connected to the substrate 100 and has a first opening 421, wherein one end of the rotating shaft 430 passes through the first opening 421 and is connected to the first friction layer 410.

[0056] The electronic paper display device 10 requires a power source to provide electrical energy in order to realize the display function of the electronic paper display device 10. However, this makes the use of the electronic paper display device 10 inconvenient. Therefore, the conventional electronic paper display device 10 is equipped with a triboelectric nanogenerator 400 to power the electronic paper display device 10. However, since the triboelectric nanogenerator 400 is set up externally, the size of the electronic paper display device 10 increases.Therefore, the technical solution of this application provides a display device, which includes an electronic paper display device 10 comprising a substrate 100, an electronic paper display module 200, a power management module 300, and a triboelectric nanogenerator 400. The power management module 300 is disposed on the substrate 100, located between the substrate 100 and the electronic paper display module 200, and electrically connected to the electronic paper display module 200. The triboelectric nanogenerator 400 is disposed on the substrate 100, located between the substrate 100 and the electronic paper display module 200. Between groups 200, and a portion of the triboelectric nanogenerator 400 extends beyond the edge of the electronic paper display module 200, the triboelectric nanogenerator 400 is electrically connected to the power management module 300, the triboelectric nanogenerator 400 includes a first friction layer 410, a second friction layer 420, and a rotating shaft 430, the first friction layer 410 being located on the side of the second friction layer 420 closer to the electronic paper display module 200, the rotating shaft 430 being rotatably mounted on the substrate 100, and the rotating shaft 430 being connected to one of the first friction layer 410 and the second friction layer 420, and the first friction layer 410 being located on the side of the second friction layer 420 closer to the electronic paper display module 200, the first friction layer 410 being located on the side of the second friction layer 420 closer to the electronic paper display module 200, the rotating shaft 430 being rotatably mounted on the substrate 100, and the rotating shaft 430 being connected to one of the first friction layer 410 and the second friction layer 420, and the first friction layer 410 being located on the side of the second friction layer 420 closer to the edge of the electronic paper display module 200, the second friction layer 420 being located on the side of the second friction layer 420, the second friction layer 410 being located on the side of the second friction layer 42 ...20 being located on the side of the second friction layer 420, the second friction layer 420 being located on the side of the second friction layer 420, the second friction layer In the first friction layer 410 and the second friction layer 420, a portion of the friction layer connected to the rotating shaft 430 extends beyond the edge of the electronic paper display module 200. Specifically, the second friction layer 420 is connected to the substrate 100 and has a first opening 421, through which one end of the rotating shaft 430 passes and connects to the first friction layer 410. That is, in the technical solution of this application, because a portion of the friction layer connected to the rotating shaft 430 in the first friction layer 410 and the second friction layer 420 extends beyond the edge of the electronic paper display module 200, it ensures that the rotating shaft 430 can pass through the first opening 421 and connect to the first friction layer 410. The second friction layer 420 extends beyond a portion of the electronic paper display module 200, generating current to power the electronic paper display module 200 and enabling the display function of the electronic paper display device 10. Furthermore, since the triboelectric nanogenerator 400 and the power management module 300 are located on the backlight side of the electronic paper display module 200, the triboelectric nanogenerator 400, the power management module 300, and the electronic paper display module 200 are integrated into a single structure. Compared to the conventional solution of setting the triboelectric nanogenerator 400 externally, this does not increase the volume of the electronic paper display device 10, thus achieving a thinner and lighter electronic paper display device 10.

[0057] It should be noted that the triboelectric nanogenerator 400 utilizes Maxwell's displacement current principle to directly convert mechanical energy in the environment (such as contact separation, sliding, pressing, and vibration) into electrical energy through the synergistic effect of triboelectric charging and electrostatic induction.

[0058] In this embodiment, reference Figures 13-15 The first friction layer 410 includes a plurality of first blades, and the second friction layer 420 includes a plurality of second blades. The plurality of first blades are arranged circumferentially with the rotation axis 430 as the central axis, and the plurality of second blades are arranged circumferentially with the rotation axis 430 as the central axis. When the second friction layer 420 rotates with the rotation axis 430 as the central axis, the plurality of second blades and the plurality of first blades can overlap or be misaligned.

[0059] In this embodiment, the relationship between the number of the first fan blades and the angle of the first fan blades is N1 = 180° / θ1, and the relationship between the number of the second fan blades and the angle of the second fan blades is N2 = 180° / θ2, where N1 and N2 are positive integers, θ1 is the central angle of the first fan blade, and θ2 is the central angle of the second fan blade. Preferably, the angle of θ1 is 22.5°, 45°, or 90°, and the angle of θ2 is 22.5°, 45°, or 90°.

[0060] In this embodiment, the number of the first fan blades is equal to the number of the second fan blades.

[0061] During operation, the first friction layer 410 and the second friction layer 420 will cycle from overlapping to misalignment and back to overlapping again as the second friction layer 420 rotates. During this process, the first friction layer 410 and the second friction layer 420 generate different charge-driven voltages, thereby generating periodic pulse currents.

[0062] In this embodiment, the material of the first friction layer 410 is a conductive metal, a conductive polymer, or a conductive inorganic material.

[0063] Specifically, the material of the first friction layer 410 is polyaniline (PANI), polystyrene (PS), polystyrene-poly(ethylene-butene)-polystyrene block copolymer (SEBS), polyamide (nylon), polyethylene glycol succinate, polyurethane elastomer (PU), polyethylene terephthalate (PET), polyimide (PI), polyethylene glycol adipate, cotton fabric, silk, paper, wool, polymethyl methacrylate (PMMA), polylactic acid (PLA), aluminum (Al), copper (Cu), strontium titanate (STO) electrospun film, etc. At least one of the following: tetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polydimethylsiloxane (PDMS), polyvinyl chloride (PVC), polychlorotrifluoroethylene (PCTFE), polytetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (PFA), polyhexafluoropropylene (FEP), ethyl cellulose, nitrile rubber (NBR), polyoxymethylene, polyvinyl chloride, polycarbonate, carbon nanotubes (CNTs), graphene, conductive polymer (PEDOT:PSS), and composite ceramic materials (zinc oxide, silicon dioxide).

[0064] In this embodiment, the material of the second friction layer 420 is a conductive metal, a conductive polymer, or a conductive inorganic material.

[0065] Specifically, the material of the second friction layer 420 is polyaniline (PANI), polystyrene (PS), polystyrene-poly(ethylene-butene)-polystyrene block copolymer (SEBS), polyamide (nylon), polyethylene glycol succinate, polyurethane elastomer (PU), polyethylene terephthalate (PET), polyimide (PI), polyethylene glycol adipate, cotton fabric, silk, paper, wool, polymethyl methacrylate (PMMA), polylactic acid (PLA), aluminum (Al), copper (Cu), strontium titanate (STO) electrospun film, etc. At least one of the following: tetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polydimethylsiloxane (PDMS), polyvinyl chloride (PVC), polychlorotrifluoroethylene (PCTFE), polytetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (PFA), polyhexafluoropropylene (FEP), ethyl cellulose, nitrile rubber (NBR), polyoxymethylene, polyvinyl chloride, polycarbonate, carbon nanotubes (CNTs), graphene, conductive polymer (PEDOT:PSS), and composite ceramic materials (zinc oxide, silicon dioxide).

[0066] In this embodiment, the material of the first friction layer 410 is different from the material of the second friction layer 420.

[0067] In this embodiment, reference Figure 4 The electronic paper display device 10 further includes an energy storage module 600, which is disposed on the substrate 100 and located between the substrate 100 and the electronic paper display module 200. The energy storage module 600 is electrically connected to the power management module 300. By including an energy storage module 600 on the substrate 100 and located between the substrate 100 and the electronic paper display module 200, and electrically connected to the power management module 300, the energy storage module 600 can store the electrical energy generated by the triboelectric nanogenerator 400 and power the electronic paper display module 200, thus improving the ease of use of the electronic paper display device 10. Furthermore, since the energy storage module 600 is located between the substrate 100 and the electronic paper display module 200, it is integrated inside the electronic paper display device 10, without increasing the volume of the device, thereby improving its integration and facilitating its thinner and lighter design.

[0068] In this embodiment, reference Figure 4The power management module 300 includes a rectifier module 310, a buck module 320, a voltage regulator module 330, and a control module 340. The input terminal of the rectifier module 310 is electrically connected to the triboelectric nanogenerator 400. The input terminal of the buck module 320 is electrically connected to the output terminal of the rectifier module 310. The input terminal of the voltage regulator module 330 is electrically connected to the buck module 320. The output terminal of the voltage regulator module 330 is electrically connected to the energy storage module 600 and the electronic paper display module 200. The control module 340 is electrically connected to the output terminals of the rectifier module 310 and the voltage regulator module 330. The power management module 300 includes a rectifier module 310, a step-down module 320, a voltage regulator module 330, and a control module 340. The input terminal of the rectifier module 310 is electrically connected to the triboelectric nanogenerator 400. The input terminal of the step-down module 320 is electrically connected to the output terminal of the rectifier module 310. The input terminal of the voltage regulator module 330 is electrically connected to the step-down module 320. The output terminal of the voltage regulator module 330 is electrically connected to the energy storage module 600 and the electronic paper display module 200. The control module 340 is electrically connected to the output terminals of the rectifier module 310 and the voltage regulator module 330. The rectifier module 310 can rectify the electrical output of the triboelectric nanogenerator 400, converting it into DC power that can be processed by subsequent modules. The step-down module 320 and the voltage regulator module 330 play the role of voltage conversion and stabilization, enabling the electrical energy to be safely charged and discharged.

[0069] In this embodiment, the shaft 430 of the triboelectric nanogenerator 400 is electrically connected to the power management module 300.

[0070] The sixth embodiment of this application provides a sixth type of electronic paper display device 10. The sixth embodiment is similar to the fifth embodiment, but differs from the fifth embodiment in that, in reference to... Figure 10The triboelectric nanogenerator 400 further includes a fifth friction layer 460, which is disposed on the surface of the second friction layer 420 near the electronic paper display module 200. The fifth friction layer 460 has a second opening 461, wherein one end of the rotating shaft 430 passes through the first opening 421 and the second opening 461 and connects to the first friction layer 410. By including the fifth friction layer 460 in the triboelectric nanogenerator 400, which is disposed on the surface of the second friction layer 420 near the electronic paper display module 200, and has a second opening 461, wherein one end of the rotating shaft 430 passes through the first opening 421 and the second opening 461 and connects to the first friction layer 410, when the first friction layer 410 rotates, the first friction layer 410 can overlap or misalign with the second friction layer 420 and the fifth friction layer 460, which is beneficial to improving the performance of the electronic paper display device 10.

[0071] In this embodiment, from a top-down view of the electronic paper display device 10, the second friction layer 420 overlaps with the fifth friction layer 460.

[0072] It is understood that, from the perspective of looking down at the electronic paper display device 10, the second friction layer 420 overlaps with the fifth friction layer 460, that is, the fifth friction layer 460 and the second friction layer 420 have the same structure. The fifth friction layer 460 has a plurality of fifth blades, and the number of fifth blades is the same as the number of second blades, and the central angle of the fifth blades is equal to the central angle of the second blades.

[0073] In this embodiment, the material of the fifth friction layer 460 is a conductive metal, a conductive polymer, or a conductive inorganic material.

[0074] Specifically, the material of the fifth friction layer 460 is polyaniline (PANI), polystyrene (PS), polystyrene-poly(ethylene-butene)-polystyrene block copolymer (SEBS), polyamide (nylon), polyethylene glycol succinate, polyurethane elastomer (PU), polyethylene terephthalate (PET), polyimide (PI), polyethylene glycol adipate, cotton fabric, silk, paper, wool, polymethyl methacrylate (PMMA), polylactic acid (PLA), aluminum (Al), copper (Cu), strontium titanate (STO) electrospun film, etc. At least one of the following: tetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polydimethylsiloxane (PDMS), polyvinyl chloride (PVC), polychlorotrifluoroethylene (PCTFE), polytetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (PFA), polyhexafluoropropylene (FEP), ethyl cellulose, nitrile rubber (NBR), polyoxymethylene, polyvinyl chloride, polycarbonate, carbon nanotubes (CNTs), graphene, conductive polymer (PEDOT:PSS), and composite ceramic materials (zinc oxide, silicon dioxide).

[0075] In this embodiment, the material of the fifth friction layer 460 is different from the material of the second friction layer 420.

[0076] In this embodiment, the shaft 430 of the triboelectric nanogenerator 400 is electrically connected to the power management module 300.

[0077] The seventh embodiment of this application provides a seventh type of electronic paper display device 10. The seventh embodiment is similar to the fifth embodiment, but differs from the fifth embodiment in that, in reference to... Figure 11 The triboelectric nanogenerator 400 further includes a first electrode layer 470 and a second electrode layer 480. The first electrode layer 470 is disposed on a surface of the first friction layer 410 near the electronic paper display module 200, and the second electrode layer 480 is disposed on a surface of the second friction layer 420 away from the electronic paper display module 200. Both the first electrode layer 470 and the second electrode layer 480 are electrically connected to the power management module 300. The triboelectric nanogenerator 400 further includes a first electrode layer 470 and a second electrode layer 480. The first electrode layer 470 is disposed on a surface of the first friction layer 410 near the electronic paper display module 200, and the second electrode layer 480 is disposed on a surface of the second friction layer 420 away from the electronic paper display module 200. Both the first electrode layer 470 and the second electrode layer 480 are electrically connected to the power management module 300. The first electrode layer 470 and the second electrode layer 480 can concentrate charges, thereby improving the output performance of the triboelectric nanogenerator 400 and ensuring that the display screen of the electronic paper display device 10 is more stable.

[0078] In this embodiment, the material of the first electrode layer 470 is a conductive metal, a conductive polymer, or a conductive inorganic material.

[0079] Specifically, the conductive metal can be copper or aluminum, the conductive polymer can be PEDOT:PSS, and the conductive inorganic material can be graphene.

[0080] It is understood that in this embodiment, both the first electrode layer 470 and the second electrode layer 480 are electrically connected to the power management module 300. Therefore, in the seventh embodiment, it is not necessary to electrically connect the rotating shaft 430 to the triboelectric nanogenerator 400.

[0081] In this embodiment, reference Figure 9 The first friction layer 410 and the second friction layer 420 have a spacing d, which is no greater than 3 mm. By setting a spacing d between the first friction layer 410 and the second friction layer 420, and the spacing d being no greater than 3 mm, it is possible to avoid the performance degradation of the triboelectric nanogenerator 400 if the spacing d between the first friction layer 410 and the second friction layer 420 is too large. Preferably, the spacing d is 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, or 3.0 mm.

[0082] In this embodiment, a surface of the first friction layer 410 away from the electronic paper display module 200 contacts a surface of the second friction layer 420 close to the electronic paper display module 200.

[0083] In this embodiment, reference Figure 12 The electronic paper display device 10 further includes an insulating layer 500, which is disposed on a surface of the electronic paper display module near the substrate 100. By including the insulating layer 500 on the surface of the electronic paper display module near the substrate 100, the insulating layer 500 can isolate the triboelectric nanogenerator 400 from the electronic paper display module 200, preventing the charge generated by the triboelectric nanogenerator 400 from interfering with the electronic paper display module 200, thereby improving the stability of the display image of the electronic paper display device 10.

[0084] It is understood that in this embodiment, both the first electrode layer 470 and the second electrode layer 480 are electrically connected to the power management module 300. Therefore, in the seventh embodiment, it is not necessary to electrically connect the rotating shaft 430 to the triboelectric nanogenerator 400.

[0085] It is understood that in the fifth to seventh embodiments, different embodiments can be combined with each other to form new embodiments.

[0086] The specific embodiments of this application have been described in detail above. The embodiments disclosed above are merely preferred embodiments of this application. Those skilled in the art can make many modifications and improvements without departing from the concept of this application. All such modifications and improvements fall within the scope of protection defined by the claims of this application.

Claims

1. An electronic paper display device, characterized by comprising: include: substrate; An electronic paper display module, wherein the electronic paper display module is disposed on the substrate; A power management module is disposed on the substrate, located between the substrate and the electronic paper display module, and electrically connected to the electronic paper display module. A triboelectric nanogenerator is disposed on the substrate and located between the substrate and the electronic paper display module, with a portion of the triboelectric nanogenerator extending beyond the edge of the electronic paper display module. The triboelectric nanogenerator is electrically connected to the power management module. The triboelectric nanogenerator includes a first friction layer, a second friction layer, and a rotating shaft. The first friction layer is located on the side of the second friction layer closer to the electronic paper display module. The rotating shaft is rotatably mounted on the substrate and connected to one of the first and second friction layers. A portion of the first and second friction layers connected to the rotating shaft extends beyond the edge of the electronic paper display module. 2.The electronic paper display device of claim 1, wherein, The first friction layer is connected to the electronic paper display module, and the second friction layer is connected to the rotating shaft. 3.The electronic paper display device of claim 2, wherein, The triboelectric nanogenerator further includes a third friction layer, which is disposed on a surface of the first friction layer away from the electronic paper display module. 4.The electronic paper display device of claim 2, wherein, The triboelectric nanogenerator further includes a fourth friction layer, which is disposed on a surface of the second friction layer near the electronic paper display module, and the fourth friction layer is connected to the rotating shaft. 5.The electronic paper display device of claim 1, wherein, The second friction layer is connected to the substrate, and the second friction layer has a first opening, wherein one end of the rotating shaft passes through the first opening and is connected to the first friction layer. 6.The electronic paper display device of claim 5, wherein, The triboelectric nanogenerator further includes a fifth friction layer, which is disposed on a surface of the second friction layer near the electronic paper display module. The fifth friction layer has a second opening, wherein one end of the rotating shaft passes through the first opening and the second opening and is connected to the first friction layer. 7.The electronic paper display device of claim 1 or 5, wherein, The triboelectric nanogenerator further includes a first electrode layer and a second electrode layer. The first electrode layer is disposed on a surface of the first triboelectric layer close to the electronic paper display module, and the second electrode layer is disposed on a surface of the second triboelectric layer away from the electronic paper display module. Both the first electrode layer and the second electrode layer are electrically connected to the power management module. 8.The electronic paper display device of claim 1, wherein, There is a gap between the first friction layer and the second friction layer, and the gap is no greater than 3 mm. 9.The electronic paper display device of claim 1, wherein, The surface of the first friction layer away from the electronic paper display module is in contact with the surface of the second friction layer close to the electronic paper display module. 10.The electronic paper display device of claim 1, wherein, The electronic paper display device further includes an insulating layer disposed on a surface of the electronic paper display module near the substrate.

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