CN106067741B - Display device - Google Patents
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- CN106067741B CN106067741B CN201610424936.6A CN201610424936A CN106067741B CN 106067741 B CN106067741 B CN 106067741B CN 201610424936 A CN201610424936 A CN 201610424936A CN 106067741 B CN106067741 B CN 106067741B
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- 230000000670 limiting effect Effects 0.000 claims abstract description 25
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- 239000002086 nanomaterial Substances 0.000 claims description 8
- 229920000079 Memory foam Polymers 0.000 claims description 6
- 239000008210 memory foam Substances 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 15
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000012935 Averaging Methods 0.000 abstract 1
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- 238000010586 diagram Methods 0.000 description 11
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- 239000003094 microcapsule Substances 0.000 description 6
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- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 239000002033 PVDF binder Substances 0.000 description 2
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- 238000009776 industrial production Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
- H02N1/04—Friction generators
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- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
The invention discloses a kind of display device, can at least solve the problems, such as that display device of the prior art can not utilize self-powered technology humanized electric paper display to reach averaging effect.The display device includes：Electric paper display and the friction charger for electric paper display power supply, wherein, friction charger includes：Friction generator, for converting mechanical energy into electric energy when being acted on by external force；The resilience limiting part being coated on outside friction generator, for limiting the rebound velocity and/or rebound height of friction generator after external force disappears.
Description
Technical Field
The present invention relates to the field of electronic circuits, and more particularly, to a display device.
Background
With the rapid growth in demand for portable mobile devices, wearable display products, and the like, low power display devices have received widespread attention in the industry. Currently, low power consumption display devices mainly include organic light emitting diodes (oleds) which must be continuously powered by an external power source to display, and electronic paper displays which can be powered off after a short period of power supply and continuously display patterns before the power off. Based on the above characteristics of the electronic paper display, it is obviously more suitable to make a low power consumption display device by using the electronic paper display.
However, most of the conventional electronic paper displays are powered by the power module, and once the power of the power module is exhausted, the power cannot be continuously supplied, so that the service time is limited. Even if the electronic paper display driven by the self-powered technology appears, because the display principle of the electronic paper display is special, the corresponding color is displayed by utilizing the movement of the microcapsules inside under the action of the electric field force, and when the direction of the electric field force is changed, the movement mode of the microcapsules is also influenced, therefore, the electronic paper display has strict requirements on the direction and the magnitude of the input voltage, and the normal display cannot be realized once the direction and the magnitude of the input voltage are not proper. However, the self-powered technology usually generates electric energy based on friction or pressing, and the direction and strength of the friction or pressing, especially the degree of springback, are difficult to predict, so that the generated voltage is random, and it is difficult to meet the actual display requirement of the electronic paper display.
Disclosure of Invention
The invention provides a display device, which is used for solving the problem that the display device in the prior art cannot drive an electronic paper display by utilizing a self-powered technology so as to achieve a normal display effect.
The present invention provides a display device, including: electronic paper display and for the friction power supply ware of electronic paper display power supply, wherein, friction power supply ware includes: at least one friction generator for converting mechanical energy into electrical energy when acted upon by an external force; and the rebound limiting component is coated outside the friction generator and used for limiting the rebound speed and/or rebound height of the friction generator after the external force disappears.
In the display device provided by the invention, the electronic paper display is driven by the friction power supply so as to realize the self-powered effect of the whole device. The friction power supply device comprises a friction power generator and a rebound limiting component coated outside the friction power generator, and the rebound limiting component can limit the rebound speed and/or the rebound height of the friction power generator after external force disappears so as to limit the size of voltage output by the friction power generator, and therefore the actual display requirement of the electronic paper display is met. Therefore, the display device can limit the output voltage of the friction generator, so that the display device can meet the display requirement of an electronic paper display, the purpose of driving the low-power-consumption display device is achieved in a self-powered mode, energy is saved, the environment is protected, and the trouble that the battery cannot be used or replaced due to the exhaustion of the battery is avoided. In addition, the display device provided by the invention has the advantages of light weight, small volume and convenience for carrying and using by a user; and the structure and the manufacturing process are simple, the cost is low, and the method is suitable for large-scale industrial production.
Drawings
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a specific structure of an electronic paper display according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a specific structure of a friction power supply provided by an embodiment of the present invention;
FIG. 4 shows a waveform of an AC voltage that can normally drive an electronic paper display;
5a to 5c show the change process of the friction generator when the friction generator is deformed by force;
fig. 6 shows a schematic diagram of the display effect of the electronic paper display at different driving voltages.
Detailed Description
The present invention will be described in detail with reference to the following embodiments in order to fully understand the objects, features and effects of the invention, but the present invention is not limited thereto.
The invention provides a display device, which at least can solve the problem that the display device in the prior art cannot drive an electronic paper display by utilizing a self-powered technology so as to achieve a normal display effect.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in fig. 1, the display device includes: an electronic paper display 11 and a friction power supply 12 for supplying power to the electronic paper display 11. Wherein the friction power supplier 12 further comprises: at least one friction generator 121 for converting mechanical energy into electrical energy when acted upon by an external force; and a rebound limiting member 122 coated outside the friction generator 121 for limiting a rebound speed and/or a rebound height of the friction generator 121 after the external force disappears.
Therefore, the display device in the embodiment of the invention can limit the output voltage of the friction generator to meet the display requirement of the electronic paper display, so that the aim of driving the low-power-consumption display device is fulfilled in a self-powered manner.
The following describes the specific structure and operation principle of the display device provided by the present invention in detail by a specific embodiment:
in this embodiment, the display device includes an electronic paper display and a friction power supply for supplying power to the electronic paper display. Fig. 2 shows a specific structural schematic diagram of an electronic paper display provided in an embodiment of the present invention, and fig. 3 shows a specific structural schematic diagram of a friction power supply provided in an embodiment of the present invention. The specific structure and working principle of the electronic paper display and the friction power supply are respectively described as follows:
as shown in fig. 2, the electronic paper display includes: a first electrode 21 and a first flexible substrate 22 in contact with a first side surface of the first electrode 21, a second electrode 23 and a second flexible substrate 24 in contact with a first side surface of the second electrode 23, and a microcapsule 20 is further disposed between a second side surface of the first electrode 21 and a second side surface of the second electrode 23. Wherein the first electrode 21 and the second electrode 23 are respectively connected with two power output ends of the friction power supply so as to receive the power provided by the friction power supply and display under the driving of the power. In general, when the driving voltage is a forward voltage, the microcapsules show black; when the driving voltage is a reverse voltage, the microcapsule shows white.
The following description will be given by taking an example in which black is required to be displayed. Since the voltage output by the friction generator in the friction power supply of the invention is an alternating voltage which changes in real time, once the reverse voltage is greater than or equal to the forward voltage, the electronic paper display cannot normally display or display is unclear due to charge neutralization. In order to avoid the situation that the electronic paper display cannot normally display or display is unclear due to charge neutralization, the forward voltage output by the friction generator in the friction power supply is required to be greater than the reverse voltage, so that the normal display of the electronic paper display is ensured. Fig. 4 shows a waveform diagram of an ac voltage capable of normally driving an electronic paper display. As shown in fig. 4, the forward voltage V1 is greater than the reverse voltage V2. Preferably, the forward voltage V1 is in the driving voltage range of the electronic paper display, and the higher the value of the forward voltage V1, the clearer the display effect (of course, the forward voltage V1 should not be higher than the upper limit of the driving voltage in order to avoid damaging the electronic paper). The reverse voltage V2 is less than the minimum driving voltage of the e-paper display to avoid interference with the forward voltage and influence on the display effect.
As shown in fig. 3, the friction power supplier includes: a friction generator 30 and a rebound-limiting member 31 covering the outside of the friction generator 30. Wherein the friction generator 30 further comprises: a first electrode layer 301, a first polymer insulating layer 302, a second polymer insulating layer 303, and a second electrode layer 304 are stacked in this order. In fig. 3, a four-layer friction generator is schematically illustrated as an example, and in other embodiments of the present invention, the friction generator may also be a three-layer friction generator, a five-layer intermediate film structure, or a five-layer intermediate electrode structure, and the specific structures of the friction generators will be described separately finally. In fig. 3, the two opposing surfaces of the first polymer insulating layer 302 and the second polymer insulating layer 303 form the friction interfaces of the friction generator, and the friction interfaces rub against each other, and charges are induced between the first electrode layer 301 and the second electrode layer 302, so that it can be seen that the first electrode layer 301 and the second electrode layer 302 serve as two power output terminals of the friction generator. In order to further improve the power generation efficiency, a micro-nano structure is provided on at least one of two surfaces of the first high molecular polymer insulating layer 302 and the second high molecular polymer insulating layer 303 which are opposite to each other. The micro-nano structure can be flexibly implemented in various forms, for example, in fig. 3, a bump array structure (i.e., one micro-nano structure) can be disposed on a surface of the first high polymer insulating layer 302 opposite to the second high polymer insulating layer 303.
In fig. 3, the rebound-limiting member 31 is a snap-fit member, and the outer edge of the friction generator is entirely fitted into the snap-fit groove of the snap-fit member. The specific shape of the slot-type component depends on the shape of the friction generator, namely: the outer contour of the snap-in groove component conforms to the shape of the friction generator so as to completely encase the entire outer edge of the friction generator. For example, when the friction generator is a rectangular parallelepiped, the outer contour of the slot-type component is a rectangular frame to cover four sides of the friction generator; when the friction generator is a cylinder, the outer contour of the snap-in groove type component is an annular frame so as to coat the whole outer edge of the friction generator.
In addition, in the present embodiment, the description is given taking an example in which all the outer edges of the friction generator are fitted into the pockets of the pocket type member, but in another embodiment of the present invention, at least one side of the outer edges of the friction generator may be fitted into the pockets of the pocket type member. For example, when the friction generator is a rectangular parallelepiped, only one side of the outer edge (i.e., a portion corresponding to one side of the rectangular parallelepiped) may be inserted into the slot of the slot-type component, and in this case, the slot-type component has an elongated shape. For another example, when the friction generator is a rectangular parallelepiped, only two opposite sides of the outer edge (i.e., the portions corresponding to two opposite sides of the rectangular parallelepiped) may be embedded in the slot-type component, and in this case, the slot-type component has two strip shapes independent of each other. For another example, when the friction generator is a rectangular parallelepiped, only two sides perpendicular to each other in the outer edge (i.e., corresponding portions with respect to two perpendicular sides in the rectangular parallelepiped) may be embedded in the slot-type component, and in this case, the slot-type component has two long shapes perpendicular to each other and having a common end point. In addition, when the friction generator is a cuboid, three sides of the outer edge of the friction generator can be embedded into the clamping groove type component. Moreover, when the friction generator has other shapes, such as triangle and polygon, the specific shape of the slot-type component can be flexibly set according to the above principle, and is not limited herein.
No matter what the shape of the clamping groove type component is, the clamping groove type component is provided with a clamping groove used for being embedded into the outer edge of the friction generator. Because the rebound limiting component is used for limiting the rebound speed and/or the rebound height of the friction generator, the height of the clamping groove arranged on the rebound limiting component is smaller than or equal to the original height of the friction generator, and the maximum deformation height of the friction generator is smaller than the original height of the friction generator. Preferably, the height of the clamping groove is twice the maximum deformation height of the friction generator. For example, when the height of the clamping groove is equal to the original height of the friction generator, the friction generator can rebound to the original height at most after being stressed and deformed, and cannot exceed the original height due to inertia, so that the size of reverse input voltage can be limited; when the height of the clamping groove is slightly smaller than the original height of the friction generator, the outer edge of the friction generator can be continuously compressed to a smaller degree, so that the rebound height of the friction generator is better limited. In a specific implementation, assuming that the height of the card slot is X1, the original height of the friction generator is X2, and the maximum deformation height of the friction generator is X3, then X1< X2 or X1 ═ X2, and X3< X2. In addition, the inventor experimentally verifies that when the conditions of X1< X2 or X1 ═ X2 and X3< X2 are met, the optimal rebound limiting effect can be achieved when X1 ═ 2X 3.
Fig. 5a to 5c show the change process of the friction generator when the friction generator is deformed by force. Wherein fig. 5a shows an original state of the friction generator, when the friction generator is not subjected to any external force, and thus, the height of the friction generator is the original height at this time.
Fig. 5b shows a schematic diagram of the deformation of the friction generator when the friction generator is subjected to an external force F, and the friction generator is pressed to deform due to the downward direction of the external force F, so that the height of the friction generator is reduced. In the process, two friction interfaces of the friction generator are in mutual contact friction and generate static charges, so that the first electrode layer of the friction generator is provided with positive charges, the second electrode layer of the friction generator is provided with negative charges, at the moment, the friction generator outputs forward voltage, microcapsules in the electronic paper display are displayed to be black, and a preset display effect is achieved.
Fig. 5c shows a schematic diagram of the friction generator after the external force F applied to the friction generator disappears, and due to the disappearance of the external force, the friction generator gradually returns to the original state from the squeezed state, and accordingly, the two friction interfaces are separated from each other, so that the first electrode layer of the friction generator is negatively charged, the second electrode layer is positively charged, and at this time, the friction generator outputs a reverse voltage. In the process, if the limitation action of the rebound limiting component is not provided, the friction generator is easy to expand due to excessive rebound because of the influence of factors such as inertia, the material of the high polymer insulating layer and the like, so that the rebound speed of the friction generator is too high and/or the rebound height of the friction generator is too large, further, the voltage value of the generated reverse voltage of the friction generator is larger than the voltage value of the forward voltage because the instantaneous height of the friction generator is larger than the original height, and the voltage value is higher than the voltage value of the forward voltage (inevitably higher than the minimum driving voltage of the electronic paper) because the generation speed of the reverse voltage is very high, so that the electronic paper display is likely to recover to the original state due to charge neutralization without displaying a preset pattern, and display failure is likely to occur. In the invention, the rebound speed and/or rebound height of the friction generator are/is inhibited due to the addition of the rebound limiting component, so that the reverse voltage generated by the friction generator in the rebound process is smaller than the forward voltage. Preferably, the height of the clamping groove on the rebound limiting component can be reasonably set, so that the reverse voltage generated by the friction generator in the rebound process is also smaller than the minimum driving voltage of the electronic paper display.
The material of the rebound limiting component 31 may be Memory Foam (also called slow rebound), and is a polyurethane high polymer with an Open-cell structure (Open-cell), and the material has a special viscoelastic property, embodies a very soft material property, and has a very strong impact energy absorbing capability. The material molecule is very sensitive to temperature, so the material is also called temperature-sensitive memory foam. The Open-Cell molecules of this material will "Flow" when stressed by an external force and shift to conform to the contour of the contact surface of the pressure applicator, thereby spreading the pressure evenly across the contact surface, and will slowly return to their original shape when the pressure is removed, so this material was also initially referred to as Slow Spring back foam. Specifically, the memory cotton is divided into various types such as pressure memory cotton and gravity memory cotton, and various types of memory cotton can be flexibly selected to realize the memory cotton.
In addition, after experimental verification by the inventor, it is found that there is indeed a close relationship between the display effect of the electronic paper display and the driving voltage, and fig. 6 shows a schematic diagram of the display effect of the electronic paper display at different driving voltages. Wherein the left and right side of the figure show the display effect driven briefly by dc voltages 6V and 2V, respectively. Under the drive of the voltage 2V, the black line segment is basically unchanged; under the drive of the voltage 6V, the black line segment becomes a white line segment. Therefore, the display effect of the electronic paper display can be obviously improved by controlling the output voltage range of the friction generator.
Therefore, in the display device provided by the embodiment of the invention, the limitation on the output voltage of the friction generator can be realized through the rebound limiting component, so that the reverse voltage of the friction generator is smaller than the forward voltage, the display requirement of the electronic paper display is met, the display effect of the electronic paper display is improved, and the purpose of driving low-power-consumption display in a self-powered manner is achieved.
In addition, in the above embodiment, the example that the electronic paper display needs to display black is taken as an example to explain, and therefore the reverse voltage is required to be smaller than the forward voltage, and it can be understood by those skilled in the art that when the electronic paper display needs to display white, the forward voltage is correspondingly required to be smaller than the reverse voltage, at this time, the action force of the friction generator is adjusted, or a voltage inverter is added, and the like, and the implementation principle is similar to that described above, and is not described here again.
In addition, in the above embodiments, the rebound limiting member only covers the outer edge of the friction generator, and in other embodiments of the present invention, the rebound limiting member may completely cover the friction generator, in which case, the rebound limiting member includes a cavity inside, and the friction generator is disposed in the cavity. Based on similar principles as above, the height of the cavity should be less than or equal to the original height of the triboelectric generator, and the maximum deformation height of the triboelectric generator is less than the original height of the triboelectric generator. Preferably, the height of the cavity is twice the maximum deformation height of the triboelectric generator. In a specific implementation, assuming that the height of the cavity is Y1, the original height of the friction generator is Y2, and the maximum deformation height of the friction generator is Y3, Y1< Y2 and Y3< Y2. In addition, the inventor experimentally verifies that when the conditions of Y1< Y2 and Y3< Y2 are met, the optimal rebound limiting effect can be achieved when Y1 is 2Y 3.
For ease of understanding, several alternative specific configurations of the friction generator are briefly described below by way of several examples:
examples one,
The first structure of the friction generator is a three-layer structure, which includes: the electrode structure comprises a first electrode layer, a first high polymer insulating layer and a second electrode layer which are sequentially stacked. Specifically, the first electrode layer is disposed on a first side surface of the first high molecular polymer insulating layer; and the second side surface of the first high molecular polymer insulating layer is arranged opposite to the second electrode layer. In the above structure, the first side surface of the first high molecular polymer insulating layer and the first electrode layer are relatively fixed, and the second side surface of the first high molecular polymer insulating layer and the second electrode layer are in contact friction when pressed or bent, and charges are induced at the first electrode layer and the second electrode layer. Therefore, in this example, the two opposing surfaces of the first polymer insulating layer and the second electrode layer constitute a friction interface of the friction generator, and the first electrode layer and the second electrode layer respectively serve as two output ends of the friction generator, i.e. an electric energy output end of the friction power supply.
In the method, metal and polymer are rubbed, and the characteristic that metal easily loses electrons is mainly utilized, so that an induced electric field is formed between friction interfaces, and voltage and/or current are/is generated.
Examples two,
The second structure of the friction generator is a four-layer structure, which includes: the electrode structure comprises a first electrode layer, a first high polymer insulating layer, a second high polymer insulating layer and a second electrode layer which are sequentially stacked. Specifically, the first electrode layer is disposed on a first side surface of the first high molecular polymer insulating layer; the second electrode layer is arranged on the first side surface of the second high polymer insulating layer; the second side surface of the first high molecular polymer insulating layer and the second side surface of the second high molecular polymer insulating layer are in contact friction when pressed or bent, and charges are induced at the first electrode layer and the second electrode layer. Therefore, in this example, the two faces of the first high molecular polymer insulating layer and the second high molecular polymer insulating layer disposed opposite to each other constitute a friction interface of the friction generator. The first electrode layer and the second electrode layer are respectively used as two output ends of the friction generator, namely an electric energy output end of the friction power supply.
Examples III,
The third structure of the friction generator is a five-layer structure with an intermediate film, and comprises a first electrode layer, a first high-molecular polymer insulating layer, an intermediate film layer, a second high-molecular polymer insulating layer and a second electrode layer which are sequentially stacked. Specifically, the first electrode layer is disposed on a first side surface of the first high molecular polymer insulating layer; the second electrode layer is disposed on the first side surface of the second high molecular polymer insulating layer, and the intervening thin film layer is disposed between the second side surface of the first high molecular polymer insulating layer and the second side surface of the second high molecular polymer insulating layer. In this example, the intermediate thin film layer is an intermediate polymer, which may be directly disposed between the first polymer insulating layer and the second polymer insulating layer, and is not fixed to the first polymer insulating layer and the second polymer insulating layer, and at this time, a set of friction interfaces is formed between the intermediate thin film layer and the first polymer insulating layer, and another set of friction interfaces is formed between the intermediate thin film layer and the second polymer insulating layer. Alternatively, the intermediate film layer may be fixed to one of the first polymer insulating layer and the second polymer insulating layer and may form a friction interface with the other. For example, the first side surface of the intervening film layer is fixed on the second side surface of the second high molecular polymer insulating layer, and the second side surface of the intervening film layer and the second side surface of the first high molecular polymer insulating layer constitute a frictional interface contact friction. At this time, since the intermediate thin film layer and the second high molecular polymer insulating layer are relatively fixed, when the friction generator is pressed, the second side surface of the first high molecular polymer insulating layer and the second side surface of the intermediate thin film layer contact and rub and charges are induced at the first electrode layer and the second electrode layer. The first electrode layer and the second electrode layer are respectively used as two output ends of the friction generator, namely an electric energy output end of the friction power supply.
Example four,
The fourth structure of the friction generator is a five-layer structure with an intermediate electrode, and comprises a first electrode layer, a first high polymer insulating layer, an intermediate electrode layer, a second high polymer insulating layer and a second electrode layer which are sequentially stacked; the first electrode layer is arranged on the first side surface of the first high polymer insulating layer; the second electrode layer is disposed on the first side surface of the second high molecular polymer insulating layer, and the intermediate electrode layer is disposed between the second side surface of the first high molecular polymer insulating layer and the second side surface of the second high molecular polymer insulating layer. In this manner, an electrostatic charge is generated by friction between the intermediate electrode layer and the first and second high molecular polymer insulating layers, whereby a potential difference will be generated between the intermediate electrode layer and the first and second electrode layers. In this example, the intervening electrode layer is made of a material from which the electrode can be made. Two surfaces of the intermediate electrode layer, which are opposite to the first high polymer insulating layer, form a group of friction interfaces, and/or two surfaces of the intermediate electrode layer, which are opposite to the second high polymer insulating layer, form another group of friction interfaces; the first electrode layer and the second electrode layer are connected in series to form one output end of the friction generator; the intermediate electrode layer serves as the other output of the friction generator, i.e. the electrical energy output of the friction power supply.
Further, in order to improve the power generation capacity of the friction generator, in the above four examples, a micro-nano structure may be further provided on at least one of the two opposing faces constituting the friction interface. Thus, when the triboelectric generator is compressed, the opposing surfaces of the two friction interfaces are better able to contact friction and induce more charge. The micro-nano structure can be realized in two possible ways: in a first mode, the micro-nano structure is a micro-scale or nano-scale very small concave-convex structure. The concave-convex structure can increase the frictional resistance and improve the power generation efficiency. The concave-convex structure can be directly formed during the preparation of the film, and an irregular concave-convex structure can also be formed on the surface of the first high polymer insulating layer by using a polishing method. Specifically, the concave-convex structure may be a concave-convex structure in a shape of a semicircle, a stripe, a cube, a quadrangular pyramid, a cylinder, or the like. The second mode is that the micro-nano structure is a nano-scale porous structure, the material used for the first high molecular polymer insulating layer is preferably polyvinylidene fluoride (PVDF), the thickness of the material is 0.5-1.2mm (preferably 1.0mm), and a plurality of nano holes are arranged on the surface of the material opposite to the second electrode. Wherein, the size of each nanopore, i.e. the width and the depth, can be selected according to the needs of the application, and the preferred size of the nanopore is as follows: the width is 10-100nm and the depth is 4-50 μm. The number of the nano-holes can be adjusted according to the required output current value and voltage value, and the nano-holes are preferably uniformly distributed with the hole spacing of 2-30 μm, and more preferably uniformly distributed with the average hole spacing of 9 μm.
In addition, according to the working principle of the friction generator, in the working process of the friction generator, two friction interfaces need to be in continuous contact friction and separation, and the generator cannot have good output performance when being in a contact state or a separation state all the time. Therefore, in order to manufacture a generator with excellent performance, in the four examples described above, the friction generator may be in the shape of an arch, for example: at least one of the two opposite surfaces forming the friction interface is further arched outwards to form a convex surface (namely, the middle part of at least one friction interface is arched towards the direction far away from or close to the other friction interface), so that a gap is formed between the two friction interfaces, and the two friction interfaces can automatically bounce without stress. In addition, a spring and/or a shim can be arranged between the two friction interfaces, so that the two friction interfaces can be automatically bounced without force, wherein the spring and/or the shim can be arranged at the corners of the two friction interfaces and the like, and can also be arranged at the center of the two friction interfaces.
In the above embodiments, the number of the friction generators in the friction power supply may be one or more; when a plurality of friction generators are adopted, the friction generators are connected in series and/or in parallel, the friction generators can be arranged in a tiled mode and in a stacked mode, and the friction generators are not limited and can be selected by a person skilled in the art according to needs.
In summary, in the display device provided by the invention, the electronic paper display is driven by the friction power supply, so as to achieve the self-powered effect of the whole device. The friction power supply device comprises a friction power generator and a rebound limiting component coated outside the friction power generator, and the rebound limiting component can limit the rebound speed and/or the rebound height of the friction power generator after external force disappears so as to limit the size of voltage output by the friction power generator, and therefore the actual display requirement of the electronic paper display is met. Therefore, the display device can limit the output voltage of the friction generator, so that the display device can meet the display requirement of an electronic paper display, the purpose of driving the low-power-consumption display device is achieved in a self-powered mode, energy is saved, the environment is protected, and the trouble that the battery cannot be used or replaced due to the exhaustion of the battery is avoided. In addition, the display device provided by the invention has the advantages of light weight, small volume and convenience for carrying and using by a user; and the structure and the manufacturing process are simple, the cost is low, and the method is suitable for large-scale industrial production.
It will be appreciated by those skilled in the art that although the steps of the method are described sequentially for ease of understanding, it should be noted that the order of the steps is not strictly limited.
Those skilled in the art will appreciate that all or part of the steps in the method for implementing the above embodiments may be implemented by relevant hardware instructed by a program, and the program may be stored in a computer readable storage medium, such as: ROM/RAM, magnetic disk, optical disk, etc.
It will also be appreciated that the arrangement of devices shown in the figures or embodiments is merely schematic and represents a logical arrangement. Where modules shown as separate components may or may not be physically separate, components shown as modules may or may not be physical modules.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (11)
1. A display device, comprising: electronic paper display and for the friction power supply ware of electronic paper display power supply, wherein, friction power supply ware includes:
at least one friction generator for converting mechanical energy into electrical energy when acted upon by an external force;
and the rebound limiting component is coated outside the friction generator and used for limiting the rebound speed and/or rebound height of the friction generator after the external force disappears.
2. The device of claim 1, wherein the rebound-limiting member is a snap-in groove member, and at least one side of an outer edge of the friction generator is inserted into a snap-in groove of the snap-in groove member.
3. The device of claim 2, wherein an outer edge of the friction generator is fully embedded within the pocket of the pocket member.
4. The device according to claim 2 or 3, wherein the height of the clamping groove is smaller than or equal to the original height of the friction generator, and the maximum deformation height of the friction generator is smaller than the original height of the friction generator.
5. The device of claim 4, wherein the height of the slot is twice the maximum deformation height of the friction generator.
6. The apparatus of claim 1, wherein the interior of the rebound-limiting member comprises a cavity, and the friction generator is disposed within the cavity.
7. The apparatus of claim 6, wherein the height of the cavity is less than or equal to the original height of the triboelectric generator, and the maximum deformed height of the triboelectric generator is less than the original height of the triboelectric generator.
8. The device of claim 7, wherein the height of the cavity is twice the maximum deformation height of the friction generator.
9. The device of claim 1, wherein the material of the rebound-limiting member is memory foam, wherein the memory foam is pressure memory foam and/or gravity memory foam.
10. The apparatus of claim 1, wherein the triboelectric generator is a three-layer, four-layer, five-layer intermediate film, or five-layer intermediate electrode triboelectric generator comprising at least two opposing faces forming a triboelectric interface, the triboelectric generator having at least two outputs; wherein,
the three-layer structure friction generator comprises: the first electrode layer, the first high polymer insulating layer and the second electrode layer are sequentially stacked, wherein two opposite surfaces of the first high polymer insulating layer and the second electrode layer form the friction interface;
the four-layer structure friction generator includes: the first electrode layer, the first high polymer insulating layer, the second high polymer insulating layer and the second electrode layer are sequentially stacked, wherein two opposite surfaces of the first high polymer insulating layer and the second high polymer insulating layer form the friction interface;
the five-layer intermediate film structure friction generator comprises: the friction interface comprises a first electrode layer, a first high molecular polymer insulating layer, an intermediate thin film layer, a second high molecular polymer insulating layer and a second electrode layer which are sequentially stacked, wherein two opposite surfaces of the first high molecular polymer insulating layer and the intermediate thin film layer and/or two opposite surfaces of the second high molecular polymer insulating layer and the intermediate thin film layer form the friction interface;
the five-layer inter-electrode structure friction generator comprises: the first electrode layer, first high-molecular polymer insulating layer, intermediate electrode layer, second high-molecular polymer insulating layer and the second electrode layer that stack gradually the setting, wherein, first high-molecular polymer insulating layer with two faces that intermediate electrode layer is relative and/or second high-molecular polymer insulating layer with two faces that intermediate electrode layer is relative constitute friction interface.
11. The device according to claim 10, characterized in that at least one of the two opposite faces constituting the friction interface is provided with micro-nano structures and/or,
at least one of two opposite surfaces forming the friction interface is arched outwards to form a convex surface, so that a gap is formed between the two friction interfaces.
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