Electronic paper and electronic paper display device

Abstract

This application discloses an electronic paper and an electronic paper display device. The electronic paper includes: a first substrate and a second substrate disposed opposite to each other, and a display unit disposed between the first substrate and the second substrate. The display unit includes a first electrode layer disposed on the first substrate, a second electrode layer disposed on the second substrate, and magnetic quantum dot ink between the first electrode layer and the second electrode layer. The magnetic quantum dot ink includes magnetic quantum dot particles. In the electronic paper structure of this application embodiment, when using magnetic quantum dot particles to transmit or reflect incident light for image display or drawing, the orientation or position of the magnetic quantum dot particles can be controlled by changing the electric field applied between the upper and lower electrode layers, thereby changing the amount of incident light transmitted or reflected, to achieve image display and transformation, ultimately presenting a painting display effect with a full color gamut.

Description

Technical Field

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

[0002] Electronic paper technology is generally referred to as a display technology that offers comfortable reading like paper, is ultra-thin and lightweight, flexible, and consumes very little power. Electronic paper displays are paper-like electronic displays that combine the advantages of paper, such as a display effect close to that of natural paper, reducing reading fatigue. Furthermore, as a display screen, electronic paper displays consume less power than conventional display devices. Summary of the Invention

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide an electronic paper and electronic display device that enriches the display image by distributing magnetic quantum dot ink between two substrates and utilizing the optical properties of the magnetic quantum dot ink.

[0004] In a first aspect, embodiments of this application provide an electronic paper, comprising:

[0005] A first substrate and a second substrate disposed opposite to each other, and a display unit disposed between the first substrate and the second substrate;

[0006] The display unit includes a first electrode layer disposed on the first substrate, a second electrode layer disposed on the second substrate, and magnetic quantum dot ink between the first electrode layer and the second electrode layer, wherein the magnetic quantum dot ink includes magnetic quantum dot particles.

[0007] Optionally, in the electronic paper of this application embodiment, the magnetic quantum dot particles are arranged in an orderly manner on the second electrode layer.

[0008] Optionally, in the electronic paper of this application embodiment, a buffer layer is provided on the second electrode layer, and the magnetic quantum dot particles are arranged in an orderly manner on the buffer layer.

[0009] Optionally, in the electronic paper of this application embodiment, the surface of the buffer layer is provided with a stable structure, and the magnetic quantum dot particles are arranged in an orderly manner in the stable structure.

[0010] Optionally, in the electronic paper of this application embodiment, a backlight source is provided on the back side of the second substrate.

[0011] Optionally, in the electronic paper of this application embodiment, one half of the magnetic quantum dot particles is filled with magnetic quantum dots, and the other half is filled with white particles.

[0012] Optionally, in the electronic paper of this application embodiment, the magnetic quantum dot ink further includes a transparent film layer disposed on the magnetic quantum dot particles.

[0013] Optionally, in the electronic paper of this application embodiment, the magnetic quantum dot ink further includes an electrophoretic solution in which the magnetic quantum dot particles can move.

[0014] Optionally, in the electronic paper of this application embodiment, the display units are provided with an isolation structure.

[0015] Secondly, embodiments of this application provide an electronic paper display device, which includes electronic paper as described in the first aspect.

[0016] In summary, the electronic paper and electronic display device provided in this application fill the space between the upper and lower electrode layers on two substrates with magnetic quantum dot ink containing dispersed magnetic quantum dot particles. This allows the electronic paper structure to control the orientation or position of the magnetic quantum dot particles by changing the electric field applied between the upper and lower electrode layers when using the magnetic quantum dot particles to transmit or reflect incident light for image display or drawing. This changes the amount of incident light transmitted or reflected, thereby achieving image display and transformation, and ultimately presenting a rich and full color gamut for drawing and display effects. Attached Figure Description

[0017] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the quantum dot structure according to an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the structure of the electronic paper according to an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the structure of electronic paper according to some embodiments of this application;

[0021] Figure 4 This is a schematic diagram of the structure of electronic paper according to some embodiments of this application;

[0022] Figure 5 This is a schematic diagram of the structure of electronic paper according to some embodiments of this application;

[0023] Figure 6 This is a schematic diagram of the structure of electronic paper according to some embodiments of this application;

[0024] Figure 7 This is a schematic diagram of the structure of electronic paper according to some embodiments of this application;

[0025] Figure 8 This is a schematic diagram of the structure of electronic paper according to some embodiments of this application.

[0026] Figure label:

[0027] 1-First substrate, 2-Second substrate, 3-Display unit, 31-First electrode layer, 32-Second electrode layer, 33-Magnetic quantum dot particles, 4-Isolation structure, 5-Buffer layer, 51-Stabilizing structure, 6-Backlight source. Detailed Implementation

[0028] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] It is understandable that in electronic paper technology, electrophoretic ink filled with charged particles is used between the electrode layers of the upper and lower substrates. The flow of these charged particles between the electrode layers causes the corresponding pixel units to brighten or darken. For example, titanium dioxide particles are typically dispersed in hydrocarbon oil, and this mixture is placed between two parallel conductive plates. When a voltage is applied to the two conductive plates, the particles migrate electrophoretically from their original plate to a plate with the opposite charge. When the particles are on the front (display surface) of the display, the screen is white; when the particles are on the back of the display, the screen is black.

[0031] It is understandable that if the electrodes on the back are divided into multiple tiny image elements (pixels), and an image is formed by applying an appropriate voltage to each area of ​​the display to create a pattern of reflective and absorptive areas.

[0032] It can also be understood that the aforementioned electrophoretic ink achieves the conversion between color and black-and-white images by utilizing the scattering or absorption of incident light by charged particles. However, the limited scattering or absorption spectrum of charged particles on incident light restricts the display effect.

[0033] In this embodiment, to enrich the display effect, magnetic quantum dot ink is filled between the upper and lower electrode layers of the two substrates to form a display structure. Due to the high color gamut light characteristics of magnetic quantum dots, when a changing voltage is applied to the upper and lower electrode layers, the magnetic quantum dot capsules in the magnetic quantum dot ink rotate or move to reflect or refract incident light, presenting a rich and realistic display effect, such as a picture book for viewing, used in various scenarios. It can also be used as a drawing tablet, enabling the drawing and saving of rich images.

[0034] It is understandable that quantum dots, as a nanoscale low-dimensional semiconductor material, have high color gamut optical properties, that is, when they reflect incident light or emit light under the action of excitation light, they can present rich image effects.

[0035] like Figure 1 As shown, traditional quantum dots can be material structures with CdSe as the core, ZnS as the outer core, and then ligands added to the outside.

[0036] Furthermore, the magnetic quantum dots involved in the embodiments of this application can be magnetic materials prepared by adding γ-Fe2O3, Fe3O4, Co, Fe and various ferrite nanoparticles in the core, or adding magnetic nanoparticles when forming the outer core, or directly grafting ligands on the outside of the quantum dots.

[0037] To better understand the electronic paper and electronic paper display device provided in the embodiments of this application, the following will be explained... Figures 2 to 8 A detailed explanation is provided.

[0038] Figure 2 This is a schematic diagram of the structure of electronic paper provided in the embodiments of this application, such as... Figure 2 As shown, the electronic paper includes:

[0039] A first substrate 1 and a second substrate 2 are disposed opposite to each other, and a display unit 3 is disposed between the first substrate and the second substrate.

[0040] The display unit includes an electrode layer disposed on a first substrate and a second substrate, namely a first electrode layer 31 on the first substrate 1 and a second electrode layer 32 on the second substrate 2, and a magnetic quantum dot ink between the first electrode layer and the second electrode layer, wherein the magnetic quantum dot ink is filled with magnetic quantum dot particles 33.

[0041] Specifically, patterned electrode layers, such as an array-distributed electrode layer structure, can be formed on two substrates, namely a first substrate and a second substrate.

[0042] For example, screen printing can be used to form an array of electrode layers on a substrate, or inkjet printing can be used to form a patterned electrode layer structure to reduce process complexity and manufacturing costs.

[0043] Furthermore, magnetic quantum dot ink can be encapsulated between the two electrode layers to form optical functional materials in the electronic paper structure.

[0044] This magnetic quantum dot ink is filled with magnetic quantum dot particles.

[0045] like Figure 2As shown, the magnetic quantum dot particles in the embodiments of this application can specifically be magnetic gel particles formed by encapsulating magnetic quantum dots in a gel.

[0046] For example, magnetic quantum dots can be dispersed into a quantum gel solution under the action of high-frequency ultrasound, and then through catalytic reaction and condensation reaction, the gel is deposited on the surface of magnetic particles to obtain core-shell structured magnetic nanoparticles, i.e., magnetic quantum dot capsules.

[0047] For example, magnetic quantum dots can be dispersed in a silica gel solution to prepare magnetic quantum dot capsules.

[0048] It is understandable that magnetic quantum dots can be prepared by adding γ-Fe2O3, Fe3O4, Co, Fe, and various ferrite nanoparticles to the core of the quantum dot, or by adding magnetic nanoparticles when forming the outer core.

[0049] The electronic paper in this embodiment fills the space between the motor layers with magnetic quantum dot ink. By utilizing the optical properties of the magnetic quantum dots, a changing electric field is applied to the upper and lower electrode layers. This causes the transmission or reflection of incident light to change when the orientation or position of the magnetic quantum dot particles changes, thereby presenting a rich image on the surface of the electronic paper.

[0050] In practice, the resulting electronic paper structure can be used as a display screen for visual presentations. Alternatively, the electronic structure can also serve as a handwriting screen, enabling touch-based handwriting on one of the substrates or as a drawing board for writing with a stylus.

[0051] It is understood that in the embodiments of this application, the electronic paper and display units can be arrayed between two substrates, that is, the electrodes on the substrate can be divided into multiple tiny image elements (pixels), so that each display unit is a sub-pixel unit in the display process, thereby forming an image by applying an appropriate voltage to each area of ​​the electronic paper to generate a pattern of reflective and absorptive areas.

[0052] Optionally, in this embodiment of the application, in order to improve the high-definition display of electronic paper or the sensitivity of handwriting, an isolation structure can be set between adjacent display units, that is, an isolation pattern layer for isolating magnetic quantum dot inks of adjacent display units can be formed on the exposed electrode layer.

[0053] like Figure 2 As shown, an insulating strip-shaped isolation structure 4 can be provided between the corresponding second electrode layers in the two display units to form an array-distributed cavity structure on the second substrate.

[0054] For example, an insulating isolation structure can be coated onto the non-recording area of ​​the electrode layer, that is, the area between the two electrode layers corresponding to adjacent pixel units.

[0055] The non-recording area refers to the area between two adjacent display units, that is, the area where the electrophoretic ink is not covered and no writing is required.

[0056] It can be understood that by using an isolation structure to form an array of cavities on a second substrate, magnetic quantum dot ink can be filled into each cavity to form an array of display units between the two substrates, which can be understood as forming an array of sub-pixel units.

[0057] For example, inkjet printing or other processes can be used to print magnetic quantum dot ink into an array of distributed cavities, forming an array of display units on electronic paper.

[0058] Furthermore, such as Figure 3 As shown, in some embodiments, in order to achieve high-definition color display and rich graphics, different colors of magnetic quantum dot ink can be filled into each display unit, i.e., the cavity formed by the isolation structure.

[0059] Specifically, in some embodiments of this application, magnetic quantum dot inks of different colors can be filled into the cavities of adjacent display units to form sub-pixel units of different colors distributed in an array.

[0060] For example, red, green and blue magnetic quantum dot inks can be sequentially and regularly filled into the cavities of adjacent display units to form an array of red, green and blue display units.

[0061] It is understandable that the red, green and blue magnetic quantum dot inks contain magnetic quantum dots of corresponding colors. When magnetic quantum dots are used, different colored pigments are filled into the core or outer core to form corresponding colored magnetic quantum dots.

[0062] In this embodiment of the electronic paper, an isolation structure is used to divide the upper and lower electrode layers into an array of cavity structures. Then, colored magnetic quantum dot ink is filled into the cavity structures to form an array of display units between the two substrates. Each display unit can then serve as a sub-pixel unit in the display process. By applying an appropriate voltage to each area of ​​the electronic paper to generate reflective and absorptive patterns, an image can be formed.

[0063] Optionally, in some embodiments of this application, in order to reduce process complexity, the display can be realized based on the electrophoretic display mode. That is, in the cavity corresponding to the display unit, the magnetic quantum dot particles are immersed in the electrophoretic solution, and then the magnetic quantum dot particles are controlled to form electrophoretic motion in the middle by the voltage change between the upper and lower electrodes.

[0064] Specifically, such as Figure 2 and Figure 3 As shown, when the magnetic quantum dot particles move to the top, external light shines on their surface, reflecting the incident light to create a bright color. Specifically, when the upper electrode layer is positively charged and the lower electrode layer is negatively charged, the magnetic quantum dot particles spread across the top surface through the electrophoretic motion chamber, reflecting the incident light and forming the corresponding colored pattern. Conversely, when the opposite charge is applied, they move downwards, absorbing the incident light and causing the display to disappear.

[0065] The magnetic quantum dot ink in this embodiment includes magnetic quantum dot particles and an electrophoretic solution. The electrophoretic solution can be silicone oil or other electrophoretic solution components.

[0066] It is understood that the electronic paper in this embodiment disperses magnetic quantum dot particles in an electrophoretic liquid based on an electrophoretic display mode, and then uses voltage changes on the upper and lower electrode layers to control the movement of the magnetic quantum dot particles in the electrophoretic liquid between the upper and lower electrode layers, so as to realize the drawing or display and transformation of the electronic paper surface, and can make the color gamut of the image full and the drawing effect realistic.

[0067] It can also be understood that in the above embodiments, the electrophoretic display mode, due to the electrophoretic liquid placed between the upper and lower electrode layers to provide space for the movement of magnetic quantum dot particles, results in an undesirable thickness of the electronic paper.

[0068] Furthermore, controlling the movement of magnetic quantum dot particles by applying voltage between the upper and lower electrode layers to achieve brightness variations limits their flexibility and ultimately affects the display effect.

[0069] Optional, such as Figure 4 As shown, in some other embodiments of this application, in order to reduce the thickness of electronic paper and improve the speed of controlling the attitude of magnetic quantum dot particles, due to the gel particle morphology of the prepared magnetic quantum dot particle capsules, i.e., the rod-shaped morphology, the capsule-shaped magnetic quantum dot particles can be uniformly and orderly arranged on the lower electrode layer, i.e., the second electrode layer. Then, the rotation of the magnetic quantum dot capsules can be controlled by the electric field, i.e., the attitude change of the magnetic quantum dot particles can be flexibly controlled to realize the display and change of the image on the surface of the electronic paper.

[0070] Furthermore, such as Figure 4As shown, after the magnetic quantum dots are prepared into capsule form, the magnetic quantum dot capsules can be filled into the cavity corresponding to the display unit. That is, the magnetic quantum dot capsules are arranged in an orderly manner on the surface of the second electrode layer, and a transparent film layer is covered on the top layer to achieve the filling of magnetic quantum dot ink in each display unit.

[0071] In practice, such as Figure 4 and Figure 5 As shown, after magnetic quantum dot capsules are uniformly and orderly arranged on the motor layer, these magnetic quantum dot capsules will rotate when the applied electric field changes, thereby changing the incident light to display a color image.

[0072] Optionally, in some embodiments of this application, in order to improve the display quality and handwriting accuracy, that is, to achieve the rotation angle and stability of the magnetic quantum dot capsules between the electrode layers, a buffer layer 5 can be provided on the second electrode layer, and a stabilizing structure 51 can be provided on the surface of the buffer layer, so that the magnetic quantum dot particles are stably arranged on the stabilizing structure of the buffer layer. That is, the stabilizing structure can provide support for the attitude change of the magnetic quantum dot capsule, ensuring the flexibility and stability of the attitude change of the magnetic quantum dot capsule.

[0073] Specifically, such as Figure 4 and Figure 5 As shown, the stabilizing structure can be set as a uniformly arranged cone structure to form an inclined structure on the surface of the buffer layer, providing stable support for the magnetic quantum dot capsules printed on it during rotation, ultimately enabling the electronic paper surface to present good image quality.

[0074] For example, the surface of a planarized layer can be padded with grooves at a certain angle using photo-alignment techniques or a friction process. This angle can range from 45° to 65°.

[0075] It is understood that the specific process and structural form of the stable structure can be flexibly set according to the actual situation, and the embodiments of this application do not limit this.

[0076] In practice, the electronic paper provided in this embodiment, when in a natural light environment, such as during the day or under indoor lighting, allows natural light to pass through the transparent film layer on the magnetic quantum dot capsules and then onto the magnetic quantum dot capsules. The magnetic quantum dot capsules, in different orientations, will transmit, absorb, and reflect the incident light to display a color image on the electronic paper.

[0077] For example, such as Figure 4 and Figure 5As shown, when no electric field is applied between the upper and lower electrode layers, the magnetic quantum dot capsule is in a vertical initial state. Natural light incident from the front of the electronic paper, that is, natural light incident from the first substrate, passes through the transparent film layer on the magnetic quantum dot capsule, and is absorbed and reflected by the colored magnetic quantum dot capsule, ultimately presenting an image formed by the location of the magnetic quantum dot capsule.

[0078] Furthermore, such as Figure 6 When an electric field is applied between the upper and lower electrode layers, causing the magnetic quantum dot capsule to rotate, the amount of natural light incident from the front of the electronic paper onto the colored magnetic quantum dot capsule will change, resulting in color changes.

[0079] Optionally, in order to further enrich the functions of electronic paper and enable it to display images in dark environments, that is, to present images in environments without ambient light, a backlight can be provided in the electronic paper structure of the above embodiments.

[0080] For example, such as Figure 7 As shown, a backlight source can be disposed on the back side of the second transparent substrate, and the backlight source can be white light.

[0081] In practice, the electronic paper provided in this embodiment can be used in environments with insufficient natural light, such as at night or in indoor lighting conditions. A backlight source can be turned on, and the backlight, after passing through the transparent substrate and electrode layer, is incident on the magnetic quantum dot capsules. The magnetic quantum dot capsules, in different orientations, will transmit and absorb the incident light to display a color image on the electronic paper.

[0082] For example, when no electric field is applied between the upper and lower electrode layers, the magnetic quantum dot capsule is in a vertical initial state. The backlight source incident from the back of the second substrate is absorbed by the colored magnetic quantum dot capsule after it is incident on the colored magnetic quantum dot capsule, while the remaining incident light will pass through the transparent film layer and finally enter the human eye, thus presenting the corresponding picture and exhibiting the backlight effect.

[0083] Furthermore, when an electric field is applied between the upper and lower electrode layers, causing the magnetic quantum dot capsule to rotate, the amount of light absorbed by the backlight source incident from the back of the electronic paper onto the colored magnetic quantum dot capsule will change, thus achieving a color change and presenting the same backlight transmission effect.

[0084] The electronic paper in this embodiment uses natural light or backlight as excitation light, enabling it to be used in any scenario and to present a rich and full picture, thus improving the display effect.

[0085] Optionally, in some embodiments of this application, in order to reduce process complexity and simplify the electronic paper structure, self-luminous magnetic quantum dots can also be used, that is, self-luminous magnetic quantum dots are encapsulated in a gel to prepare magnetic quantum dot capsules.

[0086] In this embodiment, the electronic paper structure does not require external natural light or backlight during actual use. It can simply change the electric field to utilize the self-luminous properties of magnetic quantum dots to present rich color or black and white images.

[0087] Furthermore, in some embodiments of this application, in order to enrich the functionality of electronic paper, a special structure, namely heterochromatic magnetic quantum dot particles, can be used as the optical functional material in electronic paper.

[0088] Specifically, such as Figure 8 As shown, the gel particles with this special structure can be configured such that one half is filled with magnetic colored quantum particles and the other half is filled with white particles, such as multifunctional particles filled with TiO2 white particles.

[0089] It is understood that by filling the two electrode layers of electronic paper with the heterochromatic magnetic quantization capsule in this embodiment, one side can be displayed in color and the other side in black and white.

[0090] Similarly, a backlight source can be provided in the electronic paper structure of this embodiment to enable normal display or drawing functions at night.

[0091] Optionally, in some embodiments of this application, in order to realize the touch mode of the electronic paper described in the above embodiments, a sub-sensitive pattern layer can be formed on the electrode layer by inkjet printing process.

[0092] Optionally, in some embodiments of this application, in order to achieve high-precision drawing functions, a power supply unit can also be set between the display units.

[0093] For example, each display unit is configured with a power supply unit, that is, each display unit is adjacent to a power supply unit. A display unit and a power supply unit form a pixel unit of the handwriting screen, so that a display unit and a power supply unit correspond one-to-one, and each power supply unit supplies power to the corresponding display unit.

[0094] For example, a power supply unit can be configured for two display units, so that the power supply unit supplies power to both display units, and the power supply unit can be located between the two display units.

[0095] The power supply unit can be implemented based on the principle of magnetostrictive materials. That is, an electric field is generated through the adsorption and frictional contact of magnetostrictive materials to provide a changing electric field to the adjacent display unit, thereby realizing the writing function.

[0096] The electronic paper provided in this application embodiment fills the space between the upper and lower electrode layers on two substrates with ordered magnetic quantum dot particles. This results in an electronic paper structure that, when using the magnetic quantum dot particles to transmit or reflect incident light from natural light or backlight sources for displaying or drawing images, can control the rotation of the magnetic quantum dot particles by changing the electric field applied between the upper and lower electrode layers. This changes the amount of incident light transmitted or reflected, thereby achieving the display and transformation of images. This results in a small overall thickness of the electronic paper and a rapid response speed when displaying existing images or drawing images.

[0097] Furthermore, due to the high color gamut of magnetic quantum dot particles, and the ability to adjust the switching between black and glossy colors by using a backlight source, the electronic paper structure enables drawing in black and glossy areas and coloring in color, maximizing the functionality of a real drawing tablet, with color vibrancy far exceeding that of a physical drawing tablet. Moreover, the textured drawing surface with a tactile feel enhances diffuse reflection, increasing the texture of the drawing and making it more tactile, thus boosting the user's artistic inspiration.

[0098] On the other hand, embodiments of this application also provide a method for preparing electronic paper, which specifically may include:

[0099] Step 1: Perform a single-layer hydrophilic treatment on the first and second substrates (oxygen Plasma 3 mins or PVA solution spin coating) to facilitate the uniform dispersion of conductive ink on the ultrathin film; then, sonicate the conductive material to achieve uniform dispersion of the conductive substance; use a direct-write inkjet printing device to uniformly print the conductive material on the hydrophilic treatment ultrathin film, controlling the relevant parameters of the direct-write inkjet printing device (e.g., speed, droplet volume, stroke); after drying, the preparation of the conductive pattern on the substrate layer is completed.

[0100] Step 2: Ultrasonically disseminate the pressure-sensitive material to achieve uniform dispersion of the conductive material. Then, use a direct-write inkjet printing device to uniformly spray the pressure-sensitive material onto an ultra-thin film containing the conductive material. Control the relevant parameters of the direct-write inkjet printing device (e.g., speed, droplet volume, stroke). After drying, the pressure-sensitive pattern preparation of the electrode layer and substrate layer is completed.

[0101] The above steps can be used to prepare the electrode layers on the upper and lower substrates.

[0102] Step 3: Apply the insulating adhesive layer and isolation structure to the non-recording area of ​​the electrode layer. The insulating adhesive layer serves to bond the electrode layer and the substrate layer, while ensuring that the electrode layer and the substrate layer are in an open circuit state when the ultrathin electronic paper is not pressed.

[0103] The non-recording area refers to the edge area of ​​the substrate or the area between two adjacent display units. In other words, the non-recording area is not covered by electrophoretic ink and does not require writing.

[0104] Step 4: Set a buffer layer on the second electrode layer of the second substrate, and form a groove with an inclined structure on the surface of the buffer layer by photo-alignment technology or other process technology to provide support points for the magnetic quantum dot particles.

[0105] Step 5: Set a backlight structure on the back side of the second substrate, such as forming an LED light-emitting structure that emits white light.

[0106] Step 6: Magnetic quantum dot ink is printed onto the arrayed recording area enclosed by the isolation structure using inkjet printing technology to form arrayed display units.

[0107] Step 7: Assemble the first and second substrates facing each other, cure the adhesive, and cut the magnetic display panel using a stamping method to complete the preparation of the transparent ultra-thin magnetic handwriting screen.

[0108] It is understood that the above steps can be flexibly selected or processed according to the actual situation, and the embodiments of this application do not impose any restrictions on this.

[0109] The electronic paper manufacturing method provided in this application fills the space between the upper and lower electrode layers on two substrates with ordered magnetic quantum dot particles. This results in an electronic paper structure that, when using the magnetic quantum dot particles to transmit or reflect incident light from natural light or backlight sources for display or drawing, can control the rotation of the magnetic quantum dot particles by changing the electric field applied between the upper and lower electrode layers. This changes the amount of incident light transmitted or reflected, thereby achieving the display and transformation of the image and ultimately presenting a display effect with a full color gamut.

[0110] On the other hand, this application also provides an electronic paper display device, which may include the electronic paper of the above embodiments, as well as a base plate, a driver chip, a circuit board and an interface, etc.

[0111] In summary, the electronic paper and electronic display device provided in this application fill the space between the upper and lower electrode layers on two substrates with magnetic quantum dot ink containing dispersed magnetic quantum dot particles. This allows the electronic paper structure to control the orientation or position of the magnetic quantum dot particles by changing the electric field applied between the upper and lower electrode layers when displaying or drawing images by transmitting or reflecting incident light through the magnetic quantum dot particles. This changes the amount of incident light transmitted or reflected, thereby achieving the display and transformation of the image and ultimately presenting a display effect with a full color gamut.

[0112] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An electronic paper, characterized by comprising: The electronic paper includes: A first substrate and a second substrate disposed opposite to each other, and a display unit disposed between the first substrate and the second substrate; The display unit includes a first electrode layer disposed on the first substrate, a second electrode layer disposed on the second substrate, and magnetic quantum dot ink between the first electrode layer and the second electrode layer. The magnetic quantum dot ink includes magnetic quantum dot particles, which are arranged in an orderly manner on the second electrode layer. Half of the magnetic quantum dot particles are filled with magnetic quantum dots, and the other half are filled with white particles. A buffer layer is provided on the second electrode layer, and a stable structure is provided on the surface of the buffer layer, wherein the magnetic quantum dot particles are arranged in an orderly manner in the stable structure; The stabilizing structure includes a groove formed on the surface of the buffer layer with a certain tilt angle, the tilt angle being in the range of 45°-65°, and the magnetic quantum dot particles are arranged in the groove.

2. The electronic paper according to claim 1, characterized by A backlight source is provided on the back side of the second substrate.

3. The electronic paper of claim 1, wherein, The magnetic quantum dot ink also includes a transparent film layer disposed on the magnetic quantum dot particles.

4. The electronic paper of claim 1, wherein, The magnetic quantum dot ink also includes an electrophoretic solution in which the magnetic quantum dot particles can move.

5. The electronic paper according to any one of claims 1-4, characterized in that, An isolation structure is provided between the display units.

6. An electronic paper display device, characterized by comprising: The electronic paper display device includes the electronic paper as described in any one of claims 1-5.

Images