阅读说明：本技术 一种显示装置及显示方法 (Display device and display method ) 是由 侯婷婷 蒲雄 杨伯儒 古逸凡 其他发明人请求不公开姓名 于 2019-11-29 设计创作，主要内容包括：本发明公开了一种显示装置及显示方法,因显示装置中包括直流摩擦纳米发电机和显示结构,且直流摩擦纳米发电机可以在外力作用下产生直流的电信号,即将外界环境中的机械能转换为电能,所以通过直流摩擦纳米发电机输出的电能可以为显示结构供电,使得无需在设置电源的情况下,即可实现为显示结构供电,从而实现了无源自驱动。因采用直流摩擦纳米发电机,且输出直流的电信号,所以该显示装置无需设置整流器等结构,仅通过直流摩擦纳米发电机即可有效驱动显示结构进行显示,进一步简化了显示装置的结构,降低了显示装置的制作成本。并且,使得该显示装置可以实现质轻和便携的设计,以满足各种应用场景的需要,拓宽了显示装置的应用领域。(The invention discloses a display device and a display method, wherein the display device comprises a direct current friction nano generator and a display structure, and the direct current friction nano generator can generate direct current electric signals under the action of external force, namely, mechanical energy in the external environment is converted into electric energy, so that the electric energy output by the direct current friction nano generator can supply power for the display structure, the display structure can be powered without setting a power supply, and the passive self-driving is realized. Because the direct-current friction nano generator is adopted and outputs direct-current electric signals, the display device does not need to be provided with structures such as a rectifier, and the display structure can be effectively driven to display only through the direct-current friction nano generator, so that the structure of the display device is further simplified, and the manufacturing cost of the display device is reduced. Moreover, the display device can realize light and portable design so as to meet the requirements of various application scenes and widen the application field of the display device.)

1. A display device, comprising: the display structure is electrically connected with the direct current friction nano generator;

the direct current friction nano generator is used for: and outputting a direct-current electric signal to the display structure under the action of an external force, so that the display structure displays the electric signal as a power supply signal.

2. The display device according to claim 1, wherein the direct current friction nano-generator is provided in two and opposite positions;

the two direct-current friction nanometer generators are electrically connected with the display structure and are respectively arranged on two opposite surfaces of the display structure.

3. The display device of claim 2, wherein the display structure includes first and second opposing drive electrodes, each electrically coupled to two of the dc tribo nanogenerators, respectively.

4. The display device of claim 3, wherein the display structure is an electronic paper display;

the electronic paper display further includes: a charged capsule located between the first drive electrode and the second drive electrode, the charged capsule comprising charged particles having different polarities and having different colors;

the two direct-current friction nano-generators are specifically used for:

and respectively outputting direct current signals with opposite polarities to the first driving electrode and the second driving electrode according to a preset rule so as to adjust the motion direction of the charged particles.

5. The display apparatus of claim 3, wherein both of the direct current triboelectric nanogenerators are sliding triboelectric nanogenerators;

the two direct current friction nanometer generators have the same structure.

6. The display device of claim 5, wherein the DC triboelectric nanogenerator comprises: the sliding structure and the friction structure are oppositely arranged, and the friction structure is positioned between the sliding structure and the display structure;

the friction structure includes: the sliding structure moves between an initial position and a final position under the action of the external force to generate the electric signal;

wherein, the first output electrode directly contacts with the sliding structure, the distance between the second output electrode and the sliding structure in the first direction is greater than zero and not greater than a first preset value, and the starting position is: the first end of the sliding structure and the first end of the first output electrode are in the same plane, and the terminal positions are as follows: the second end of sliding structure with the position when the second end of first output electrode is in the coplanar, sliding structure's first end and second end and first output electrode's first end and second end all set up along the second direction, just sliding structure's first end is close to the setting of second output electrode, first output electrode's first end is kept away from the setting of second output electrode, first direction does sliding structure with friction structure's array orientation, the second direction is first output electrode with the array orientation of second output electrode.

7. The display device of claim 6, wherein the first predetermined value is 5 millimeters.

8. The display device according to claim 6, wherein the two direct current friction nano-generators are a first direct current friction nano-generator and a second direct current friction nano-generator, respectively;

the first electrode is electrically connected with a first output electrode in the first direct current friction nano generator and a second output electrode in the second direct current friction nano generator respectively;

the second electrode is electrically connected with a second output electrode in the first direct current friction nano generator and a first output electrode in the second direct current friction nano generator respectively.

9. The display device according to any one of claims 2 to 8, wherein the display structure is a double-sided display, or the display structure is a single-sided display;

the direct-current friction nano generator is positioned on the display surface of the display structure and is a transparent direct-current friction nano generator.

10. A display method, comprising:

providing a display device as claimed in any one of claims 1 to 9;

and applying external force to enable the direct-current friction nano generator in the display device to output direct-current electric signals, so that the display structure displays the electric signals as power signals.

Technical Field

The present invention relates to electronic devices, and particularly to a display device and a display method.

Background

As a novel emission type display, the electronic paper display has great application prospect in various fields due to the advantages of low power consumption, high contrast and the like. However, since the electronic paper display needs a power supply for supplying power to the electronic paper display to realize the display, the development of the electronic paper display in terms of light weight and portability is limited.

Therefore, how to realize a light and portable design of an electronic paper display is a technical problem to be solved urgently by those skilled in the art.

Disclosure of Invention

The embodiment of the invention provides a display device and a display method, which are used for realizing the light and portable design of an electronic paper display.

In a first aspect, an embodiment of the present invention provides a display device, including: the display structure is electrically connected with the direct current friction nano generator;

the direct current friction nano generator is used for: and outputting a direct-current electric signal to the display structure under the action of an external force, so that the display structure displays the electric signal as a power supply signal.

Optionally, in an embodiment of the present invention, the direct current friction nano-generator is provided with two and oppositely arranged;

the two direct-current friction nanometer generators are electrically connected with the display structure and are respectively arranged on two opposite surfaces of the display structure.

Optionally, in an embodiment of the present invention, the display structure includes a first driving electrode and a second driving electrode that are opposite to each other, and the first driving electrode and the second driving electrode are electrically connected to the two dc tribo nanogenerators, respectively.

Optionally, in an embodiment of the present invention, the display structure is an electronic paper display;

the electronic paper display further includes: a charged capsule located between the first drive electrode and the second drive electrode, the charged capsule comprising charged particles having different polarities and having different colors;

the two direct-current friction nano-generators are specifically used for:

and respectively outputting direct current signals with opposite polarities to the first driving electrode and the second driving electrode according to a preset rule so as to adjust the motion direction of the charged particles.

Optionally, in an embodiment of the present invention, both of the two direct current friction nano-generators are sliding friction nano-generators;

the two direct current friction nanometer generators have the same structure.

Optionally, in an embodiment of the present invention, the dc friction nano generator includes: the sliding structure and the friction structure are oppositely arranged, and the friction structure is positioned between the sliding structure and the display structure;

the friction structure includes: the sliding structure moves between an initial position and a final position under the action of the external force to generate the electric signal;

wherein, the first output electrode directly contacts with the sliding structure, the distance between the second output electrode and the sliding structure in the first direction is greater than zero and not greater than a first preset value, and the starting position is: the first end of the sliding structure and the first end of the first output electrode are in the same plane, and the terminal positions are as follows: the second end of sliding structure with the position when the second end of first output electrode is in the coplanar, sliding structure's first end and second end and first output electrode's first end and second end all set up along the second direction, just sliding structure's first end is close to the setting of second output electrode, first output electrode's first end is kept away from the setting of second output electrode, first direction does sliding structure with friction structure's array orientation, the second direction is first output electrode with the array orientation of second output electrode.

Optionally, in an embodiment of the present invention, the first preset value is 5 millimeters.

Optionally, in an embodiment of the present invention, the two direct-current friction nano-generators are a first direct-current friction nano-generator and a second direct-current friction nano-generator, respectively;

the first electrode is electrically connected with a first output electrode in the first direct current friction nano generator and a second output electrode in the second direct current friction nano generator respectively;

the second electrode is electrically connected with a second output electrode in the first direct current friction nano generator and a first output electrode in the second direct current friction nano generator respectively.

Optionally, in an embodiment of the present invention, the display structure is a double-sided display, or the display structure is a single-sided display;

the direct-current friction nano generator is positioned on the display surface of the display structure and is a transparent direct-current friction nano generator.

In a second aspect, an embodiment of the present invention provides a display method, including:

providing a display device, wherein the display device is as described in the display device provided by the embodiment of the invention;

and applying external force to enable the direct-current friction nano generator in the display device to output direct-current electric signals, so that the display structure displays the electric signals as power signals.

The invention has the following beneficial effects:

the display device and the display method provided by the embodiment of the invention have the following advantages:

first, because of including direct current friction nanometer generator and demonstration structure in the display device, and direct current friction nanometer generator can produce the direct current signal of telecommunication under the exogenic action, be about to the mechanical energy conversion of external environment for the electric energy in the electric energy, so the electric energy through direct current friction nanometer generator output can be for showing the structure power supply for need not under the condition that sets up the power, can realize for showing the structure power supply, thereby realized passive self-driven.

Secondly, the friction nano generator is a direct current friction nano generator, and outputs a direct current electric signal, so that the display device provided by the embodiment of the invention does not need to be provided with structures such as a rectifier, and the display structure can be effectively driven to display only through the direct current friction nano generator, thereby further simplifying the structure of the display device and reducing the manufacturing cost of the display device.

Thirdly, the direct current friction nano generator has the characteristics of simple structure, light weight and the like, so that the display device in the embodiment of the invention can realize light weight and portable design, thereby meeting the requirements of various application scenes and widening the application field of the display device.

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 structural diagram of another display device provided in an embodiment of the invention;

fig. 3 is a schematic structural diagram of another display device provided in the embodiment of the present invention;

fig. 4 is a schematic structural diagram of a dc friction nano-generator according to an embodiment of the present invention;

fig. 5 is a schematic equivalent circuit diagram of a display device according to an embodiment of the invention;

fig. 6 is a schematic structural diagram of another specific dc friction nano-generator according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of the output result of the DC friction nano-generator according to the embodiment of the present invention;

FIG. 8 is a schematic diagram illustrating gray scale variation of a display device according to an embodiment of the present invention;

fig. 9 is a flowchart of a display method according to an embodiment of the present invention.

The nano-generator comprises a 10-direct current friction nano-generator, a 11-first direct current friction nano-generator, a 12-second direct current friction nano-generator, a 10a, 11a, 12 a-sliding structure, a 10b, 11b, 12 b-friction structure, a 10b1, a 11b1, a 12b 1-first output electrode, a 10b2, a 11b2, a 12b 2-second output electrode, a 20-display structure, a 21-first driving electrode, a 22-second driving electrode, a 23-charged capsule, a 1, 2-substrate, a 2-second friction layer, a 3-second output electrode, a 4-first friction layer, a first end of an M1-sliding structure, a second end of an M2-sliding structure, a first end of an N1-first output electrode, and a second end of an N2-first output electrode.

Detailed Description

A detailed description will be given below of a specific embodiment of a display device and a display method according to an embodiment of the present invention with reference to the drawings. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

An embodiment of the present invention provides a display device, as shown in fig. 1, which may include: a display structure 20 and a direct current triboelectric nanogenerator 10 electrically connected;

the direct current friction nanogenerator 10 is used for: the display structure 20 outputs a dc electrical signal to the display structure 20 under the action of an external force, so that the display structure 20 displays the electrical signal as a power signal.

In the embodiment of the present invention, firstly, the display device includes the dc friction nano generator 10 and the display structure 20, and the dc friction nano generator 10 can generate a dc electrical signal under an external force, that is, mechanical energy in an external environment is converted into electrical energy, so that the electrical energy output by the dc friction nano generator 10 can supply power to the display structure 20, and the display structure 20 can be powered without setting a power supply, thereby implementing passive self-driving.

Secondly, the friction nano generator is the direct current friction nano generator 10, and the output is a direct current electric signal, so the display device provided by the embodiment of the invention does not need to be provided with structures such as a rectifier, and the display structure 20 can be effectively driven to display only through the direct current friction nano generator 10, thereby further simplifying the structure of the display device and reducing the manufacturing cost of the display device.

Thirdly, the direct current friction nano generator 10 has the characteristics of simple structure, light weight and the like, so that the display device in the embodiment of the invention can realize light weight and portable design, thereby meeting the requirements of various application scenes and widening the application field of the display device.

In specific implementation, in the embodiment of the present invention, as shown in fig. 2, the dc friction nano generator may be provided with two structures (structures represented by 21 and 22) and arranged oppositely;

two direct current friction nano-generators (e.g., 21 and 22) are electrically connected to the display structure 20 and respectively disposed on two opposite surfaces of the display structure 20.

That is, the display structure 20 is disposed between two direct current friction nano-generators, and power can be supplied to the display structure 20 through the two direct current friction nano-generators, so that the display structure 20 can perform a display function.

Alternatively, in the embodiment of the present invention, as shown in fig. 2, the display structure 20 includes a first driving electrode 21 and a second driving electrode 22 which are oppositely disposed, and the first driving electrode 21 and the second driving electrode 22 are electrically connected to two direct current friction nano-generators respectively.

Therefore, the two direct current friction nano-generators can respectively provide electric signals for the first driving electrode 21 and the second driving electrode 22, so that the display structure 20 can realize the display function, and the repeated color change of the display structure 20 is facilitated.

Alternatively, in the embodiment of the present invention, as shown in fig. 2, the display structure 20 may be an electronic paper display;

at this time, the electronic paper display may further include: a charged capsule 23 located between the first and second drive electrodes 21, 22, the charged capsule 23 comprising charged particles having different polarities and having different colors;

two direct current friction nanogenerators are specifically used for:

and respectively outputting direct current signals with opposite polarities to the first driving electrode 21 and the second driving electrode 22 according to a preset rule so as to adjust the moving direction of the charged particles.

As shown in fig. 2, the charged capsule 23 may include black charged particles and white charged particles, wherein the black charged particles may be positively charged and the white charged particles may be negatively charged; alternatively, the black charged particles may be negatively charged and the white charged particles may be positively charged. Of course, the color of the charged particles is not limited to black and white, and may be other colors, and is not limited thereto, and may be selected according to actual needs.

And, the preset rule may be: the two direct current friction nano-generators alternately output direct current signals with opposite polarities to the first driving electrode 21 and the second driving electrode 22 respectively according to a preset period so as to adjust the moving direction of the charged particles.

For example, as shown in fig. 2, two direct current friction nano-generators are respectively defined as a first direct current friction nano-generator 11 and a second direct current friction nano-generator 12, wherein the first direct current friction nano-generator 11 respectively inputs an electrical signal with positive polarity to the first driving electrode 21 and inputs an electrical signal with negative polarity to the second driving electrode 22; at this time, an electric field is generated between the first drive electrode 21 and the second drive electrode 22, so that the positively charged particles (such as black particles shown in fig. 2) in the charged capsules 23 move toward the second drive electrode 22, and the negatively charged particles (such as white particles shown in fig. 2) move toward the first drive electrode 21, to implement a display function.

When the preset period is reached, the first direct current friction nano generator 11 stops inputting the electric signals to the first driving electrode 21 and the second driving electrode 22, and the second direct current friction nano generator 12 respectively inputs the electric signal with negative polarity to the first driving electrode 21 and inputs the electric signal with positive polarity to the second driving electrode 22; at this time, an electric field is generated between the first driving electrode 21 and the second driving electrode 22, so that the positively charged particles (e.g., black particles shown in fig. 2) in the charged capsules 23 move toward the first driving electrode 21, and the negatively charged particles (e.g., white particles shown in fig. 2) move toward the second driving electrode 22, whereby the moving and moving directions of the charged particles can be changed, thereby realizing the functions of color change and display.

When the next preset period is reached, the second direct current friction nano generator 12 stops inputting the electric signals to the first driving electrode 21 and the second driving electrode 22, and switches to the first direct current friction nano generator 11 to respectively input the electric signal with positive polarity to the first driving electrode 21 and input the electric signal with negative polarity to the second driving electrode 22 again; at this time, the moving direction of the charged particles is adjusted again.

Therefore, the direct current friction nano generator alternately outputs direct current signals with opposite polarities to the first driving electrode 21 and the second driving electrode 22 respectively, the display effect of the electronic paper display can be effectively adjusted and controlled, and therefore the display device has richer display effect and meets the requirements of various application scenes.

Of course, the preset period may be determined according to actual situations, and is not particularly limited herein.

Optionally, in an embodiment of the present invention, if the electronic paper display is a double-sided display or a single-sided display, and the friction nano-generator is located on the display surface of the electronic paper display, the friction nano-generator may be configured as a transparent friction nano-generator.

Certainly, when the electronic paper display is single-sided display and the friction nano generator is located on the non-display surface of the electronic paper display, the friction nano generator does not need to be set as a transparent friction nano generator, so that the design flexibility of the display device can be improved to meet the requirements of various application scenes.

Therefore, the influence of the friction nano generator on the display effect of the electronic paper display can be avoided, and the display effect of the display device is ensured; meanwhile, the application field of the display device can be expanded to meet the requirements of various application scenes.

To illustrate, optionally, when the electronic paper display is a double-sided display, the first driving electrode 21 and the second driving electrode 22 are both transparent electrodes, for example, transparent electrodes made of a transparent conductive material such as indium tin oxide.

Optionally, for the electronic paper display, the specific manufacturing process may be, but is not limited to, the following manner:

modified black and white particles are added with substances such as surfactant, alkane solvent and the like to prepare an electronic ink oil phase, wherein the black particles respectively have a certain amount of positive charges after surface modification, the proportion of the positive charges in the electronic ink oil phase is about 5-25%, the white particles respectively have a certain amount of negative charges after surface modification, and the proportion of the negative charges in the electronic ink oil phase is about 10-40%.

And (3) oscillating the obtained electronic ink oil phase by using an ultrasonic oscillator for 10-15 minutes so that the electronic ink oil phase is completely dispersed.

And adding the dispersed electronic ink oil phase into a special solution to obtain a first solution, wherein the special solution is obtained by mixing gelatin and Arabic gum according to a certain proportion.

And cooling the first solution to 5-15 ℃, and reacting for 0.5-1.5 h. And then adding an aldehyde curing agent, recovering to the normal temperature, continuing to react for 7-10 h, after the reaction is completed, selecting a screen with a proper mesh number according to the requirement, screening to obtain capsule particles with a certain particle size range, and measuring the solid content of the capsule, wherein the capsule is qualified when the solid content of the capsule is between 35-65%, and otherwise, the capsule is unqualified and screening is carried out again. Diluting the qualified capsule granules with water, standing, and storing.

Coating the diluted capsule particles on the conductive surface of the transparent ITO electrode by a scraper, and controlling the scraper to ensure that the thickness of the capsule layer is about 100-200 um; and after finishing blade coating, putting the coated film into an oven to be heated, controlling the temperature to be between 50 and 85 ℃, and keeping heating for 30 to 50 minutes so as to enable the capsule layer to be solidified on the transparent ITO electrode.

And then, carrying out hot-pressing on the surface of one side of the transparent ITO electrode with the capsule layer and the conductive surface of the other transparent ITO electrode to obtain the electronic paper diaphragm. Wherein the temperature of the hot pressing is controlled to be 70-100 ℃.

And after the hot pressing is finished, cutting the electronic paper membranes, wherein the size of each cut electronic paper membrane is 5cm by 4 cm. And (3) performing a whiteness test on the cut electronic paper membrane by using a spectrophotometer, and if the whiteness value is below 15 in an extremely black state and the whiteness value is above 65 in an extremely white state, determining that the cut electronic paper membrane is a qualified product, namely the cut electronic paper membrane serving as the qualified product can be called an electronic paper display.

In specific implementation, in the embodiment of the present invention, as shown in fig. 3, both of the two direct current friction nanogenerators (e.g., 21 and 22) are sliding friction nanogenerators;

the two direct current friction nano-generators (such as 21 and 22) have the same structure.

Therefore, the complexity of the structure of the direct-current friction nano generator can be simplified, the structural complexity of the display device is further reduced, the manufacturing process of the display device is simplified, and the manufacturing efficiency of the display device is improved.

Optionally, in an embodiment of the present invention, as shown in fig. 4, the dc friction nano generator includes: a sliding structure 10a and a friction structure 10b which are oppositely arranged, wherein the friction structure 10b is positioned between the sliding structure 10a and the display structure 20 (as shown in fig. 3, the friction structure 11b is positioned between the sliding structure 11a and the display structure 20);

the friction structure 10b includes: a first output electrode 10b1 and a second output electrode 10b2 which are spaced and arranged side by side, wherein the sliding structure 10a moves between a starting position S1 and an end position S2 under the action of external force to generate an electric signal;

wherein, the first output electrode 10b1 directly contacts with the sliding structure 10a, the distance between the second output electrode 10b2 and the sliding structure 10a in the first direction is greater than zero and not greater than a first preset value, and the starting position S1 is: the first end M1 of the sliding structure 10a and the first end N1 of the first output electrode 10b1 are at the same plane, and the end position S2 is: the second end M2 of the sliding structure 10a and the second end N2 of the first output electrode 10b1 are located at the same plane, the first end M1 and the second end M2 of the sliding structure 10a, and the first end N1 and the second end N2 of the first output electrode 10b1 are all disposed along a second direction, the first end M1 of the sliding structure 10a is disposed close to the second output electrode 10b2, the first end N1 of the first output electrode 10b1 is disposed far from the second output electrode 10b2, the first direction is an arrangement direction of the sliding structure 10a and the rubbing structure 10b (e.g., F2 direction), and the second direction is an arrangement direction of the first output electrode 10b1 and the second output electrode 10b2 (e.g., F1 direction).

For example, referring to fig. 4, the starting position is a position indicated by a dashed line S1, and the ending position is a position indicated by a dashed line S2, wherein, at the starting position S1, the first end M1 (e.g., the rightmost end) of the sliding structure 10a and the first end N1 (e.g., the leftmost end) of the first output electrode 10b1 are in the same plane; at the end position S2, the second end M2 (e.g., the leftmost end) of the sliding structure 10a is in the same plane as the second end N2 (e.g., the rightmost end) of the first output electrode 10b 1; that is, the sliding structure 10a moves back and forth between the start position S1 and the end position S2 in the second direction (the direction shown in F2) so that the dc tribo nanogenerator generates a dc electrical signal.

Moreover, in order to ensure that the dc friction nanogenerator generates a dc electrical signal, the first output electrode 10b1 needs to be in direct contact with the sliding structure 10a, and fig. 4 is only used for clearly showing the structures, and does not show that h2 is greater than 0 in an actual situation, that is, h2 should be 0 in an actual situation, so that charges are induced on the surface of the first output electrode 10b1 close to the sliding structure 10 a. For example, but not limited to, when the sliding structure 10a is made of a strong electron-withdrawing material, a positive charge is induced on a surface of the first output electrode 10b1 facing the sliding structure 10a, and a negative charge is induced on a surface of the sliding structure 10a facing the first output electrode 10b 1.

Of course, when the sliding structure 10a is made of a material having a strong positive charge, a negative charge is induced on a surface of the first output electrode 10b1 facing the sliding structure 10a, and a positive charge is induced on a surface of the sliding structure 10a facing the first output electrode 10b 1. Here, the sliding structure 10a is made of a strong electron-withdrawing material as an example.

For the second output electrode 10b2, the distance h3 between the second output electrode 10b2 and the sliding structure 10a in the first direction (the direction shown by F1) needs to be greater than zero and not greater than the first preset value, that is, the distance h3 between the second output electrode 10b2 and the sliding structure 10a needs to be greater than h 2.

As the sliding structure 10a moves to the right, because a certain gap exists between the sliding structure 10a and the second output electrode 10b2, when the sliding structure 10a moves to the right to a certain position (for example, the end position S2), electrostatic breakdown occurs when the electric field between the sliding structure 10a and the second output electrode 10b2 is sufficiently large, and the negative charge in the sliding structure 10a moves to the second output electrode 10b2, and when the first output electrode 10b1 and the second output electrode 10b2 are electrically connected, the negative charge moves to the first output electrode 10b1 through an external wire, so that a direct current can be formed between the first output electrode 10b1 and the second output electrode 10b2, as shown in the current direction in fig. 4.

When the sliding structure 10a moves to the left, the negative charges on the surface of the sliding structure 10a are consumed by the electrostatic breakdown, so that the electric field intensity between the sliding structure 10a and the second output electrode 10b2 is reduced, the electrostatic breakdown does not occur, and the sliding structure rubs against the first output electrode 10b1 again, so that no current is output at this time.

Thus, through the structural design of the direct current friction nano generator, the direct current friction nano generator can output a direct current electrical signal to drive the display structure 20 to display.

Optionally, in an embodiment of the present invention, the two direct current friction nano-generators are a first direct current friction nano-generator and a second direct current friction nano-generator, respectively;

the first electrode is electrically connected with a first output electrode in the first direct current friction nano generator and a second output electrode in the second direct current friction nano generator respectively;

the second electrode is electrically connected with the second output electrode in the first direct current friction nano generator and the first output electrode in the second direct current friction nano generator respectively.

For example, as shown in fig. 3, when the sliding structure is made of a strongly electron-withdrawing material, the first dc rubbing nanogenerator 11 can input a positive charge to the first drive electrode 21 and a negative charge to the second drive electrode 22, so that the positively charged particles in the charged capsules move to the second drive electrode 22 and the negatively charged particles move to the first drive electrode 21.

When the first dc rubbing nano-generator 11 stops outputting the dc electrical signal to the display structure 20, the second dc rubbing nano-generator 12 inputs negative charges to the first driving electrode 21 and positive charges to the second driving electrode 22, so that the positively charged particles in the charged capsules move to the first driving electrode 21 and the negatively charged particles move to the second driving electrode 22.

Therefore, the charged particles move directionally by controlling the moving direction of the charged particles, so that the color change and display functions of the electronic paper display are realized, the display device has richer display effects, and the application of the display device in multiple fields is expanded.

As shown in the equivalent circuit diagram of the display device shown in fig. 5, it can be found through the equivalent circuit diagram that the two dc friction nano-generators (e.g. 11 and 12) output electrical signals with opposite polarities to the display structure 20, so that the charged particles in the electronic paper display 20 can reciprocate to realize repeated color change, thereby enabling the electronic paper display to display richer contents.

Optionally, in an embodiment of the present invention, the first preset value is 5 microns.

Of course, the value of the first preset value is not limited to the above limitation, and may be other values that enable the dc friction nano generator to output a dc electrical signal, and is not limited herein.

Optionally, in the embodiment of the present invention, the manufacturing materials of the first output electrode, the second output electrode, the first driving electrode, and the second driving electrode may be set to be the same or different, and may be set according to actual needs, so as to meet the needs of various application scenarios, and improve flexibility of design.

Also, for convenience of fabrication, optionally, in an embodiment of the present invention, the sliding structure may include a first substrate and a first friction layer, and the first output electrode may include: the second substrate and the second rubbing layer, the second output electrode may include: a third substrate and a functional layer, the first driving electrode may include: a fourth substrate and a first electrode layer, the second driving electrode may include: a fifth substrate and a second electrode layer;

the first substrate, the second substrate, the third substrate, the fourth substrate and the fifth substrate may be made of, but not limited to, polymethyl methacrylate, polycarbonate, polystyrene, polyvinyl chloride, and the like.

When the materials for making the second friction layer, the functional layer, the first electrode layer and the second electrode layer are selected, the following materials can be selected, but are not limited to:

metal nanowires, carbon nanotubes, polymer gel, transparent tin-doped indium oxide, aluminum-doped zinc oxide, fluorine-doped tin oxide, poly (3, 4-ethylenedioxythiophene), graphene.

And the thicknesses of the second friction layer, the functional layer, the first electrode layer and the second electrode layer can be set to be but not limited to 0.01-5000 micrometers, wherein the thickness of the second friction layer can be set to be a larger value, so that the working stability of the direct current friction nano generator is ensured, and the service life of the direct current friction nano generator is prolonged.

As for the first friction layer, any material different from the second friction layer and the functional layer may be used, such as a dielectric insulating material, teflon; and the thickness of the first friction layer may be set to, but not limited to, 0.001 to 5000 micrometers.

Of course, the thicknesses of the first friction layer, the second friction layer, the functional layer, the first electrode layer and the second electrode layer are not limited to the above numerical ranges, and may be other ranges set as needed as long as the functions of the dc friction nanogenerator and the display structure can be achieved, and the thicknesses are not limited herein.

The following describes a process of manufacturing the dc tribo nanogenerator, with reference to fig. 6.

An acrylic plate 20cm long, 5cm wide and 5mm thick was produced by laser dicing and used as the substrate 1.

A layer of transparent electrode material (such as but not limited to indium tin oxide, i.e. ITO, made by magnetron sputtering) is made on one side surface of the substrate 1 as the second friction layer 2 in the first output electrode.

By laser cutting, a transparent electrode material (such as but not limited to ITO conductive glass) with a length of 3cm, a width of 5mm and a thickness of 50 μm is manufactured and is adhered to the side surface of the acrylic substrate as a second output electrode 3, as shown in fig. 6, the substrate 1, the second friction layer 2 and the second output electrode 3 constitute a friction structure.

An acrylic plate 10cm long, 5cm wide, 5mm thick is produced by laser cutting and used as the substrate 2, and then a layer of any material different from the second friction layer 3 is produced on one side surface thereof and used as the first friction layer 4 (for example, but not limited to, a PTFE film) in the sliding structure, and the substrate 2 and the first friction layer 4 constitute the sliding structure.

The two direct current friction nanometer generators have the same manufacturing process and can be manufactured in the above mode.

And finally, fixing the friction structures of the two manufactured direct-current friction nano generators on the surface of one side, which is far away from the sliding structure, of the display structure by using adhesive tapes, and then electrically connecting the first driving electrode, the second driving electrode, the first output electrode and the second output electrode through leads to obtain the display device.

Specifically, with the structure shown in fig. 3, when the display device performs display, and when the display structure 20 is an electronic paper display, the display may be performed in the following manner:

taking the dc friction nano-generator 11 as an example, the sliding structure 11a is closely contacted and opposite to the first output electrode 11b1The initial position of the sliding is as follows: the rightmost end of the slide structure 11a is vertically aligned with the leftmost end of the first output electrode 11b1, and the slide structure 11a is 15m/s at a speed of 1m/s²The acceleration of (2) slides to the right.

When the leftmost end of the sliding structure 11a is aligned up and down with the rightmost end of the first output electrode 11b1, it means that the sliding structure 11a has been slid to the end position, so that the sliding structure 11a starts to slide to the left, thereby making a repeated reciprocating motion, so that the dc friction nanogenerator 11 outputs a dc electrical signal, wherein when the electrical signal is represented by a current, the output result is as shown in fig. 7.

It should be noted that, in the embodiment of the present invention, the gray scale change of the electronic paper display can be controlled by controlling the sliding times of the sliding structure 11a, as shown in fig. 8. If the dc friction nano generator does not output an electrical signal, that is, the sliding structure 11a does not start sliding, the whiteness value of the electronic paper display is about 0.53, and as the number of sliding times of the sliding structure 11a increases, the whiteness value of the electronic paper display gradually decreases and the color gradually becomes black; when the sliding structure 11a slides for about 18 times, the whiteness value of the electronic paper display can be stabilized at about 0.14.

In fig. 7, the current given by the ordinate in the figure can be understood as the short-circuit current output by the dc tribo nanogenerator. In fig. 8, the whiteness given by the ordinate in the figure is the whiteness value mentioned in the above, and also represents the gray scale of the display, and the number of rubs represents the number of slips.

And the two direct current friction nanometer generators alternately input electric signals with opposite polarities into the electronic paper display, so that the electronic paper display can be controlled to realize repeated color change display, the electronic paper can be repeatedly utilized, and the electronic paper display can display richer contents.

Based on the same inventive concept, an embodiment of the present invention provides a display method, as shown in fig. 9, which may include:

s901, providing a display device;

the display device is the display device provided by the embodiment of the invention;

and S902, applying an external force to enable the direct-current friction nano generator in the display device to output a direct-current electric signal, so that the display structure displays the electric signal as a power supply signal.

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.