Display device, manufacturing method, and display apparatus

Abstract

A display device, manufacturing method, and display apparatus are disclosed. Each electrode region generates multiple electrons when energized. A reflector is located on the surface of the multiple electrode regions. A high-dielectric layer is located on the surface of the reflector facing away from the multiple electrode regions. The high-dielectric layer is used to capture the multiple electrons passing through the reflector and to bind the multiple electrons to form an electric field. The high-dielectric layer continues to bind the multiple electrons after the electrode regions are energized and de-energized. Multiple spaced black droplets are located on the side of the high-dielectric layer facing away from the reflector. Each droplet corresponds to one electrode region. When there is no electric field, the droplets disperse and are used to make the area of ​​the reflector corresponding to the droplet greater than or equal to a preset area, so that ambient light is reflected from the droplets as black light. When there is an electric field, the droplets contract and make the area of ​​the reflector corresponding to the droplet smaller than the preset area, so that ambient light is reflected from the reflector as white light. The white light and black light form an image, thus improving the problem that the display device cannot display an image after power failure.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically to a display device, a manufacturing method, and a display equipment. Background Technology

[0002] Currently, electrowetting display devices are popular among users due to their low power consumption and lack of backlighting. However, because the liquid droplets in the electrowetting electronic paper diffuse to absorb ambient light after power is turned off, they block the ambient light from reaching the reflector, thus preventing the display from showing an image. Summary of the Invention

[0003] The purpose of this invention is to provide a display device, a manufacturing method, and a display equipment, which improves the problem that the display device cannot display images after power failure.

[0004] To achieve the objectives of this invention, the following technical solution is provided: In a first aspect, embodiments of this application provide a display device, comprising: a plurality of electrode regions, each electrode region being configured to generate a plurality of electrons when energized; a reflector located on the surface of the plurality of electrode regions; a high-dielectric layer located on the surface of the reflector facing away from the plurality of electrode regions, the high-dielectric layer being configured to acquire the plurality of electrons passing through the reflector, the high-dielectric layer binding the plurality of electrons to form an electric field, the high-dielectric layer continuing to bind the plurality of electrons after the electrode regions are energized and de-energized; and a plurality of spaced black droplets located on the side of the high-dielectric layer facing away from the reflector, each droplet corresponding to one electrode region. When there is no electric field, the droplets disperse and are configured to make the area of ​​the droplet corresponding to the reflector greater than or equal to a preset area, so that ambient light is reflected from the droplets as black light. When the electric field is present, the droplets contract and make the area of ​​the droplet corresponding to the reflector smaller than the preset area, so that ambient light is reflected from the reflector as white light, the white light and the black light forming an image.

[0005] In one embodiment, the high dielectric layer includes a plurality of spaced high dielectric elements, each of the high dielectric elements and a droplet corresponding to one of the droplets in the direction of the plurality of electrode regions toward the reflector. The orthographic projection of each high dielectric element in the direction of the plurality of electrode regions toward the reflector covers the orthographic projection of the corresponding droplet in the direction of the plurality of electrode regions toward the reflector, and the electric field formed by the plurality of electrons of each high dielectric element covers the corresponding droplet.

[0006] In one embodiment, the display device further includes a carrier layer disposed on the surface of the high-dielectric layer facing away from the reflector. The surface of the carrier layer facing away from the high-dielectric layer is provided with a plurality of blind holes. Each blind hole is correspondingly disposed with a high-dielectric element in the direction of the plurality of electrode regions toward the reflector. Each blind hole contains a droplet. The orthographic projection of each high-dielectric element in the direction of the plurality of electrode regions toward the reflector covers the orthographic projection of the corresponding blind hole in the direction of the plurality of electrode regions toward the reflector.

[0007] In one embodiment, the surface of the carrier layer facing away from the high dielectric layer is further provided with a plurality of spaced receiving grooves, each of the blind holes being circular holes and each of the receiving grooves being rectangular grooves, each of the blind holes communicating with at least one of the receiving grooves, the area of ​​the orthographic projection of each of the receiving grooves in the direction of the plurality of electrode regions toward the reflector being smaller than the area of ​​the orthographic projection of each of the blind holes in the direction of the plurality of electrode regions toward the reflector, and each of the receiving grooves being used to receive at least a portion of one of the droplets.

[0008] In one embodiment, each of the blind holes communicates with a plurality of receiving slots, which are spaced apart circumferentially from the blind holes. The plurality of receiving slots include a first slot and a second slot. The orthographic projection of the first slot onto the direction of the plurality of electrode areas toward the reflector and the orthographic projection of the second slot onto the direction of the plurality of electrode areas toward the reflector are both rectangular. The area of ​​the orthographic projection of the first slot onto the direction of the plurality of electrode areas toward the reflector is greater than the area of ​​the orthographic projection of the second slot onto the direction of the plurality of electrode areas toward the reflector.

[0009] In one embodiment, the display device further includes an aluminum oxide layer disposed between the high dielectric layer and the carrier layer. The aluminum oxide layer is used to block the plurality of electrons from escaping to the carrier layer. The aluminum oxide layer includes a plurality of aluminum oxide elements. Each high dielectric element and one aluminum oxide element are correspondingly disposed in the plurality of electrode regions in the direction toward the reflector. The orthographic projection of each high dielectric element in the direction toward the reflector overlaps with the orthographic projection of the corresponding aluminum oxide element in the direction toward the reflector.

[0010] In one embodiment, the display device further includes a silicon dioxide layer disposed between the reflector and the high-dielectric layer. The silicon dioxide layer is used to prevent the plurality of electrons from escaping from the high-dielectric layer. The silicon dioxide layer includes a plurality of spaced silicon dioxide elements, each of which corresponds to one of the high-dielectric elements in the direction of the plurality of electrode regions toward the reflector. The orthographic projection of each silicon dioxide element in the direction of the plurality of electrode regions toward the reflector overlaps with the orthographic projection of the corresponding high-dielectric element in the direction of the plurality of electrode regions toward the reflector.

[0011] In one embodiment, in the direction of the plurality of electrode regions toward the reflector, each of the high-dielectric elements is at the same distance from the corresponding droplet.

[0012] Secondly, embodiments of this application also provide a manufacturing method, comprising: fabricating a first substrate; fabricating a plurality of electrode regions on the first substrate by magnetron sputtering deposition, each electrode region being used to generate a plurality of electrons when energized; fabricating a reflector on the surface of the plurality of electrode regions; fabricating a high-dielectric layer on the surface of the reflector facing away from the plurality of electrode regions, the high-dielectric layer being used to acquire the plurality of electrons passing through the reflector, the high-dielectric layer confining the plurality of electrons to form an electric field, and the high-dielectric layer continuing to confine the plurality of electrons after the electrode regions are energized and de-energized. A plurality of spaced black droplets are disposed on the side of the high dielectric layer facing away from the reflector. Each droplet corresponds to an electrode region. When there is no electric field, the droplets spread out to make the area of ​​the droplet covering the reflector greater than or equal to a preset area, so that ambient light is reflected from the droplets as black light. When the electric field is present, the droplets contract to make the area of ​​the droplet covering the reflector less than the preset area, so that ambient light is reflected from the reflector as white light. The white light and the black light form the image.

[0013] Thirdly, embodiments of this application also provide a display device, including a timing controller and a display device as described in the first aspect or any embodiment of the first aspect, wherein the timing controller is electrically connected to the display device and is used to transmit timing signals of the display device to the display device.

[0014] When the display device displays an image, multiple electrons are generated by energizing the electrode area. The high dielectric layer acquires these electrons that pass through the reflector. The high dielectric layer binds these electrons to form an electric field. The black droplets shrink under the influence of the electric field, and the area of ​​the reflector corresponding to the droplets is smaller than a preset area, so that ambient light is reflected from the reflector as white light. In another part of the electrode area, there are no electrons and no power. The droplets corresponding to the other part of the electrode area disperse when there is no electric field, and the area of ​​the reflector corresponding to the droplets is greater than or equal to a preset area, so that ambient light is reflected from the droplets as black light. The white light and black light form the image. After the display device is powered off, the high dielectric layer still binds multiple electrons after the electrode area is energized and de-energized. The electric field formed by the multiple electrons in the high dielectric layer when the power is off still exists, so the black and white image is maintained. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a display device in the first state of one embodiment; Figure 2 This is a schematic diagram of the structure of a display device in a second state according to one embodiment; Figure 3 This is a schematic diagram of a structure in which a blind hole and a receiving groove are connected in one embodiment; Figure 4 This is a schematic diagram of the structure of multiple electrode regions in one embodiment; Figure 5 This is a flowchart illustrating a manufacturing method of one embodiment.

[0016] Explanation of reference numerals in the attached figures: 10-Electrode region, 11-Reflector, 12-High dielectric layer, 121-High dielectric component, 13-Droplet, 14-Carrier layer, 141-Blind hole, 142-Receiving groove, 1421-First groove, 1422-Second groove, 15-Alumina layer, 151-Alumina component, 16-Silicon dioxide layer, 161-Silicon dioxide component, 17-First substrate. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this invention includes any and all combinations of one or more of the associated listed items.

[0019] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0020] Currently, electrowetting display devices are popular among users due to their low power consumption and lack of backlighting. However, when the power is turned off, the liquid droplets 13 in the electrowetting electronic paper diffuse to absorb ambient light, blocking the ambient light from reaching the reflector 11 and preventing the display from showing an image.

[0021] Please see Figure 1 , Figure 2 and Figure 4 The display device includes multiple electrode regions 10, a reflector 11, a high-dielectric layer 12, and multiple spaced black droplets 13. Each electrode region 10 is used to generate multiple electrons when energized. Optionally, the electrode region 10 is a pixel-level conductive area made of conductive material, which can emit electrons when a driving voltage is applied, and is the driving source for electron emission. Optionally, the multiple electrode regions 10 are an integral structure, forming a ring-shaped integral structure. The ring-shaped integral structure results in a strong voltage at the center and a weak voltage at the periphery, forming a gradient electric field. Optionally, at least some of the electrode regions 10 are used to be energized when the display device displays an image.

[0022] The reflector 11 is located on the surface of multiple electrode regions 10. Optionally, the reflector 11 has a structure with high visible light reflectivity, often using metal materials such as aluminum or silver, to reflect ambient light to output white light.

[0023] The high dielectric layer 12 is located on the surface of the reflector 11 facing away from the multiple electrode regions 10. The high dielectric layer 12 is used to capture multiple electrons passing through the reflector 11. The high dielectric layer 12 binds multiple electrons to form an electric field. The high dielectric layer 12 continues to bind multiple electrons after the electrode regions 10 are energized and de-energized.

[0024] Optionally, the high-dielectric layer 12 is a thin film made of a high-dielectric-constant material, possessing charge trapping and binding capabilities. It can capture electrons passing through the reflector 11 and maintain the charge distribution for a long time. Even after power is turned off, it can still maintain the charge binding state, thereby forming a stable spatial electric field. Optionally, the high-dielectric layer 12 is hafnium dioxide.

[0025] Multiple spaced black droplets 13 are located on the side of the high dielectric layer 12 facing away from the reflector 11. Each droplet 13 corresponds to an electrode region 10. When there is no electric field, the droplets 13 spread out and are used to make the area of ​​the reflector 11 corresponding to the droplet 13 greater than or equal to a preset area, so that ambient light is reflected from the droplet 13 as black light. When there is an electric field, the droplets 13 contract and make the area of ​​the reflector 11 corresponding to the droplet 13 less than the preset area, so that ambient light is reflected from the reflector 11 as white light. The white light and black light form an image.

[0026] Optionally, the black droplets 13 are dispersed in the black ink droplets 13 and have electro-responsive deformation characteristics, which can undergo morphological changes such as shrinking or spreading under the action of an electric field.

[0027] Optionally, each electrode region 10 uses an ITO silver composite conductive material. Each electrode region 10 can emit thermionic electrons when a 15V driving voltage is applied. A 20nm thick silver reflector 11 is deposited on the surface of the electrode region 10. The reflector 11 has nanoscale electron tunneling holes, allowing some electrons to pass through the reflector 11 to reach the high-dielectric layer 12. A 100nm thick hafnium dioxide high-dielectric layer 12 is deposited on top of the reflector 11. The high-dielectric layer 12 captures the tunneled electrons and binds them in the material trap energy level. After the electrode region 10 is de-energized, the electrons can still be bound, forming a stable... A fixed electric field is applied to fill the high dielectric layer 12 with insulating coating liquid and black droplets 13 of the display device. Each droplet 13 corresponds to an electrode area 10. When there is no electric field, the droplets 13 spread out under the action of surface tension, blocking 90% of the area corresponding to the reflector 11. Ambient light is absorbed by the black droplets 13 and reflected as black light. When an electric field is applied, the droplets 13 contract under the force of the electric field, blocking only 10% of the area of ​​the reflector 11. Ambient light is reflected by the reflector 11 and output as white light. By controlling the energizing state of different electrode areas 10, the display screen is formed by the combination of black light and white light.

[0028] When the display device displays an image, multiple electrons are generated by energizing the electrode area 10. The high dielectric layer 12 acquires multiple electrons that pass through the reflector 11. The high dielectric layer 12 binds multiple electrons to form an electric field. The black droplet 13 contracts under the action of the electric field, and the area of ​​the reflector 11 corresponding to the droplet 13 is smaller than a preset area, so that ambient light is reflected from the reflector 11 as white light. Another part of the electrode area 10 is de-energized and has no electrons. The droplets 13 corresponding to the other part of the electrode area 10 disperse when there is no electric field, and the area of ​​the reflector 11 corresponding to the droplet 13 is greater than or equal to a preset area, so that ambient light is reflected from the droplet 13 as black light. The white light and black light form an image. After the display device is de-energized, since the high dielectric layer 12 still binds multiple electrons after the electrode area 10 is energized and de-energized, the electric field formed by the multiple electrons in the high dielectric layer 12 when the power is off still exists, so that the black and white image is maintained.

[0029] In one implementation, please refer to Figure 1 , Figure 2 and Figure 4 The high dielectric layer 12 includes a plurality of spaced high dielectric elements 121. Each high dielectric element 121 and a droplet 13 are correspondingly arranged in the direction of the plurality of electrode regions 10 toward the reflector 11. The orthographic projection of each high dielectric element 121 in the direction of the plurality of electrode regions 10 toward the reflector 11 covers the orthographic projection of the corresponding droplet 13 in the direction of the plurality of electrode regions 10 toward the reflector 11. The electric field formed by the plurality of electrons of each high dielectric element 121 covers the corresponding droplet 13.

[0030] Optionally, the high-dielectric element 121 is a blocky high-dielectric material unit that is independently spaced in the high-dielectric layer 12, with each unit corresponding to a droplet 13. The high-dielectric element 121 is used to independently bind electrons and form a local electric field.

[0031] Optionally, the high-dielectric layer 12 is fabricated using a patterned process to form an array of multiple independently spaced high-dielectric elements 121. Each high-dielectric element 121 is a square hafnium dioxide block with a side length of 10 μm. Adjacent high-dielectric elements 121 are separated by silicon dioxide isolation trenches to prevent electrons from spreading laterally within the high-dielectric layer 12. Each high-dielectric element 121 is correspondingly set with an electrode region 10 and a black droplet 13 along the thickness direction. The orthographic projection of the high-dielectric element 121 on the plane of the electrode region 10 completely covers the orthographic projection of the corresponding droplet 13, ensuring that the local electric field formed by the electrons bound by the high-dielectric element 121 can completely cover the entire droplet 13 region. When a single electrode region 10 is energized, electrons only enter the corresponding high-dielectric element 121, and the electric field formed only drives the corresponding droplet 13 to contract. Adjacent high-dielectric elements 121 do not generate an electric field because there is no electron injection, and the corresponding droplet 13 remains spread out, completely avoiding electric field crosstalk between adjacent pixels.

[0032] Each high-dielectric element 121 and its corresponding droplet 13 are positioned in the direction of the multiple electrode regions 10 toward the reflector 11, such that the electric field corresponding to each droplet 13 is provided by the high-dielectric element 121 in the direction of the multiple electrode regions 10 toward the reflector 11. The orthographic projection of each high-dielectric element 121 in the direction of the multiple electrode regions 10 toward the reflector 11 covers the orthographic projection of the corresponding droplet 13 in the direction of the multiple electrode regions 10 toward the reflector 11, so that the electric field formed by the multiple electrons of each high-dielectric element 121 covers the corresponding droplet 13, ensuring that the droplet 13 is acted upon in the corresponding electric field.

[0033] In one implementation, please refer to Figure 1 , Figure 2 and Figure 3The display device also includes a carrier layer 14, which is disposed on the surface of the high dielectric layer 12 facing away from the reflector 11. The surface of the carrier layer 14 facing away from the high dielectric layer 12 is provided with a plurality of blind holes 141. Each blind hole 141 is correspondingly disposed with a high dielectric element 121 in the direction of the plurality of electrode regions 10 toward the reflector 11. Each blind hole 141 contains a droplet 13. The orthographic projection of each high dielectric element 121 in the direction of the plurality of electrode regions 10 toward the reflector 11 covers the orthographic projection of the corresponding blind hole 141 in the direction of the plurality of electrode regions 10 toward the reflector 11.

[0034] Optionally, the carrier layer 14 is a thin film layer made of insulating material, used to separate the high dielectric layer 12 from the droplet 13 region, and at the same time to provide a carrier and confinement structure for the droplet 13. It can be made of organic or inorganic insulating material.

[0035] Optionally, the blind hole 141 is a hole-like structure formed on the surface of the support layer 14 that does not penetrate the support layer 14 and is closed at the bottom. It is used to independently contain a single black droplet 13 and limit the lateral diffusion range of the droplet 13.

[0036] Optionally, a carrier layer 14 with a thickness of 5 μm is prepared on the surface of the high-dielectric layer 12 (hafnium dioxide layer) facing away from the reflector 11. An array of blind holes 141 are then prepared on the surface of the carrier layer 14 facing away from the hafnium dioxide layer using a photolithography process. Each blind hole 141 is a cylindrical hole with a depth of 3 μm. Each blind hole 141 precisely corresponds to a high-dielectric element 121 below it along the thickness direction. The orthographic projection of the high-dielectric element 121 completely covers the orthographic projection of the corresponding blind hole 141, ensuring that the droplet 13 within the blind hole 141 is completely protected. Within the electric field coverage of the high dielectric component 121, each blind hole 141 contains a black droplet 13. The sidewall of the blind hole 141 forms a lateral limit for the droplet 13. When there is no electric field, the droplet 13 spreads at the bottom of the blind hole 141, filling the bottom area of ​​the blind hole 141 and completely blocking the reflector 11 below. When there is an electric field, the droplet 13 shrinks to the center of the hole within the blind hole 141, exposing the surrounding reflector 11 area. The structure of the blind hole 141 can prevent the droplet 13 from shifting laterally and merging with adjacent droplets 13 during repeated deformation.

[0037] By setting each blind hole 141 to contain a corresponding droplet 13, the degree of dispersion of the droplet 13 is limited by the blind hole 141, and crosstalk between adjacent droplets 13 is avoided. The orthographic projection of each high dielectric element 121 in the direction of multiple electrode regions 10 toward the reflector 11 covers the orthographic projection of the corresponding blind hole 141 in the direction of multiple electrode regions 10 toward the reflector 11, so that the electric field formed by each high dielectric element 121 can completely act on the droplet 13 in the blind hole 141.

[0038] In one implementation, please refer to Figure 1 , Figure 2and Figure 3 The surface of the carrier layer 14 facing away from the high dielectric layer 12 is also provided with a plurality of spaced receiving grooves 142. Each blind hole 141 is a circular hole, and each receiving groove 142 is a rectangular groove. Each blind hole 141 is connected to at least one receiving groove 142. The area of ​​the orthographic projection of each receiving groove 142 in the direction of the plurality of electrode regions 10 toward the reflector 11 is smaller than the area of ​​the orthographic projection of each blind hole 141 in the direction of the plurality of electrode regions 10 toward the reflector 11. Each receiving groove 142 is used to receive at least a portion of a droplet 13.

[0039] Optionally, a rectangular receiving groove 142 is connected and disposed around each circular blind hole 141 in the insulating layer. The length of the receiving groove 142 is 1.2 times the diameter of the blind hole 141, and the width is 0.3 times the diameter of the blind hole 141. The projected area of ​​the receiving groove 142 is 36% of the projected area of ​​the blind hole 141, which is smaller than the area of ​​the blind hole 141. The depth of the receiving groove 142 is the same as the depth of the blind hole 141. The groove and the blind hole 141 are smoothly connected without any steps or obstructions. In the absence of an electric field, the black... The colored droplets 13 mainly fill the blind hole 141 area, and a small amount of droplets 13 flow into the receiving tank 142. After the droplets 13 spread out, they block all the reflectors 11 below the blind hole 141 and the receiving tank 142, resulting in a black display. When an electric field is applied, the droplets 13 are driven to shrink by the electric field, and most of the droplets 13 flow into the rectangular receiving tank 142. Only a small amount of droplets 13 remain in the center of the blind hole 141. The exposed area of ​​the reflectors 11 in the blind hole 141 area can reach more than 85%, resulting in a white display.

[0040] By setting each blind hole 141 to communicate with at least one receiving groove 142, the receiving groove 142 is used to receive part of the droplet 13. When the droplet 13 is subjected to an electric field, the rectangular groove increases the space for the droplet 13 to spread or contract, which facilitates the spread of the droplet 13 and increases the coverage area of ​​the droplet 13. This allows the area of ​​the droplet 13 that is blocked by the droplet 13 corresponding to the reflector 11 to be larger, thereby improving the purity of the black light.

[0041] In one implementation, please refer to Figure 1 , Figure 2 and Figure 3 Each blind hole 141 is connected to a plurality of receiving slots 142. The plurality of receiving slots 142 are spaced apart in the circumferential direction of the blind hole 141. The plurality of receiving slots 142 include a first slot 1421 and a second slot 1422. The orthographic projection of the first slot 1421 in the direction of the plurality of electrode areas 10 toward the reflector 11 and the orthographic projection of the second slot 1422 in the direction of the plurality of electrode areas 10 toward the reflector 11 are both rectangular. The area of ​​the orthographic projection of the first slot 1421 in the direction of the plurality of electrode areas 10 toward the reflector 11 is greater than the area of ​​the orthographic projection of the second slot 1422 in the direction of the plurality of electrode areas 10 toward the reflector 11.

[0042] Optionally, multiple receiving grooves 142 are evenly spaced along the circumference of the blind hole 141, so that the droplet 13 can be diverted and contracted in multiple directions, ensuring the symmetry of the contraction shape.

[0043] Optionally, four receiving slots 142 are arranged circumferentially around each circular blind hole 141, including one first slot 1421 and three second slots 1422. The first slot 1421 is rectangular, with a length of 8μm and a width of 2μm. The second slots 1422 are also rectangular, with a length of 4μm and a width of 1.5μm. The projected area of ​​the first slot 1421 is 2.67 times that of the second slot 1422. The areas of both the first slot 1421 and the second slots 1422 are smaller than the area of ​​the blind hole 141. When there is no electric field, the droplet 13 fills the blind hole 141 and all the receiving slots 142, appearing black.

[0044] Optionally, when a low-intensity electric field is applied, the droplet 13 first flows into the smaller second groove 1422, exposing part of the reflector 11 in the blind hole 141 area, and the pixel appears as a low-brightness gray state. Optionally, when a medium-intensity electric field is applied, the droplet 13 flows into both the first groove 1421 and the second groove 1422 simultaneously, further increasing the exposed area of ​​the blind hole 141, and the pixel appears as a medium-brightness gray state.

[0045] Optionally, when a high-intensity electric field is applied, the droplet 13 completely enters the first groove 1421 and the second groove 1422, the blind hole 141 area is completely exposed, and the pixel presents the highest brightness white state. Through the graded containment of different sized containment grooves 142, different grayscale displays are achieved, thereby improving the display level of the image.

[0046] By arranging multiple receiving grooves 142 at intervals around each blind hole 141, sufficient space is ensured for the dispersion of each droplet 13. The area of ​​the first groove 1421 projected onto the multiple electrode areas 10 in the direction towards the reflector 11 is greater than the area of ​​the second groove 1422 projected onto the multiple electrode areas 10 in the direction towards the reflector 11. Both the first groove 1421 and the second groove 1422 are rectangular grooves. The larger first groove 1421 can accommodate most of the volume of the droplet 13 when it contracts, ensuring the space requirement when the droplet 13 contracts rapidly. The smaller second groove 1422 has a smaller flow channel, which improves the dispersion or contraction speed of the droplet 13.

[0047] In one implementation, please refer to Figure 1 , Figure 2 and Figure 3The display device also includes an aluminum oxide layer 15, which is disposed between the high dielectric layer 12 and the carrier layer 14. The aluminum oxide layer 15 is used to block multiple electrons from escaping to the carrier layer 14. The aluminum oxide layer 15 includes multiple aluminum oxide elements 151. Each high dielectric element 121 and an aluminum oxide element 151 are correspondingly disposed in the direction of multiple electrode regions 10 toward the reflector 11. The orthographic projection of each high dielectric element 121 in the direction of multiple electrode regions 10 toward the reflector 11 overlaps with the orthographic projection of the corresponding aluminum oxide element 151 in the direction of multiple electrode regions 10 toward the reflector 11.

[0048] Optionally, an aluminum oxide barrier layer is prepared between the high dielectric layer 12 and the insulating layer. The aluminum oxide layer 15 is prepared into multiple independent aluminum oxide parts 151 using a patterning process. The multiple aluminum oxide parts 151 are arranged in a matrix with intervals along the row and column directions. Each aluminum oxide part 151 corresponds one-to-one with a high dielectric part 121 below it along the thickness direction. The orthographic projection of the aluminum oxide part 151 completely overlaps with the orthographic projection of the corresponding high dielectric part 121, accurately covering the upper surface of the high dielectric part 121. The aluminum oxide material has a large band gap and a high electron barrier, which can prevent the electrons bound in the high dielectric layer 12 from tunneling and escaping towards the insulating layer, thus maintaining the charge of the high dielectric layer 12. At the same time, the aluminum oxide parts 151 are set independently with intervals to avoid the lateral diffusion of electrons caused by the entire barrier layer, ensuring that the charge of each high dielectric part 121 is independently bound.

[0049] By setting an aluminum oxide layer 15 between the high dielectric layer 12 and the carrier layer 14, the aluminum oxide layer 15 is used to block electrons in the high dielectric layer 12 from escaping to the carrier layer 14. Each high dielectric element 121 and an aluminum oxide element 151 are correspondingly arranged in the direction of multiple electrode regions 10 toward the reflector 11. The orthographic projection of each high dielectric element 121 in the direction of multiple electrode regions 10 toward the reflector 11 overlaps with the orthographic projection of the corresponding aluminum oxide element 151 in the direction of multiple electrode regions 10 toward the reflector 11, which can completely prevent the escape of electrons in each high dielectric element 121.

[0050] In one implementation, please refer to Figure 1 , Figure 2 and Figure 3The display device also includes a silicon dioxide layer 16, which is disposed between the reflector 11 and the high dielectric layer 12. The silicon dioxide layer 16 is used to prevent multiple electrons from escaping from the high dielectric layer 12. The silicon dioxide layer 16 includes multiple spaced silicon dioxide elements 161, each silicon dioxide element 161 corresponding to a high dielectric element 121 in the direction of multiple electrode regions 10 toward the reflector 11. The orthographic projection of each silicon dioxide element 161 in the direction of multiple electrode regions 10 toward the reflector 11 overlaps with the orthographic projection of the corresponding high dielectric element 121 in the direction of multiple electrode regions 10 toward the reflector 11.

[0051] Optionally, a silicon dioxide blocking layer is added between the reflector 11 and the high-dielectric layer 12. The silicon dioxide layer 16 is fabricated as an array of multiple independently spaced silicon dioxide elements 161. Each silicon dioxide element 161 corresponds one-to-one with a high-dielectric element 121 above it along the thickness direction. The orthographic projection of the silicon dioxide element 161 completely overlaps with the orthographic projection of the corresponding high-dielectric element 121. The thickness of the silicon dioxide element 161 is 15nm. This allows electrons emitted from the electrode region 10 to tunnel into the high-dielectric layer 12, while blocking low-speed bound electrons in the high-dielectric layer 12 from tunneling back to the reflector 11 and the electrode region 10. Together with the aluminum oxide blocking layer above, a bidirectional electron blocking structure is formed on the upper and lower sides of the high-dielectric layer 12. This restricts electrons from escaping towards the reflector 11 and the insulating layer, extending the charge retention time. The silicon dioxide elements 161 are set independently at intervals to avoid lateral electron diffusion caused by the entire thin film.

[0052] By placing a silicon dioxide layer 16 between the reflector 11 and the high dielectric layer 12, the silicon dioxide layer 16 blocks the escape of electrons within the high dielectric layer 12. Each high dielectric element 121 and a silicon dioxide element 161 are correspondingly arranged in the direction of the multiple electrode regions 10 toward the reflector 11. The orthographic projection of each high dielectric element 121 in the direction of the multiple electrode regions 10 toward the reflector 11 overlaps with the orthographic projection of the corresponding silicon dioxide element 161 in the direction of the multiple electrode regions 10 toward the reflector 11, thus completely preventing the escape of electrons within each high dielectric element 121.

[0053] Please see Figure 5 , Figure 5 This is a schematic flowchart of a manufacturing method provided in an embodiment of this application. The method includes the following steps S501-S505, wherein, S501: Fabrication of the first substrate 17.

[0054] S502: Multiple electrode regions 10 are fabricated on the first substrate 17 by magnetron sputtering deposition, and each electrode region 10 is used to generate multiple electrons when energized.

[0055] S503: A reflector 11 is fabricated on the surface of multiple electrode regions 10.

[0056] S504: A high dielectric layer 12 is fabricated on the surface of the reflector 11 facing away from the multiple electrode regions 10. The high dielectric layer 12 is used to acquire multiple electrons passing through the reflector 11. The high dielectric layer 12 binds multiple electrons to form an electric field. The high dielectric layer 12 continues to bind multiple electrons after the electrode regions 10 are energized and de-energized.

[0057] S505: Multiple spaced black droplets 13 are arranged on the side of the high dielectric layer 12 facing away from the reflector 11. Each droplet 13 corresponds to an electrode area 10. When there is no electric field, the droplets 13 spread out and are used to block the area of ​​the reflector 11 corresponding to the droplet 13 from being greater than or equal to a preset area, so that ambient light is reflected from the droplet 13 as black light. When there is an electric field, the droplets 13 contract and the area of ​​the reflector 11 corresponding to the droplet 13 from being less than the preset area, so that ambient light is reflected from the reflector 11 as white light. The white light and black light form an image.

[0058] Optionally, the method further includes cleaning and drying the first substrate 17, fabricating a transistor switch array on the first substrate 17, depositing a gate metal layer, and forming gate traces by photolithography and etching, and forming and etching windowed vias to connect the transistors to multiple electrode regions 10.

[0059] Optionally, the method further includes preparing multiple annular gradient electrode regions 10, and depositing a transparent conductive film of 50 nm to 100 nm onto the electrode by magnetron sputtering. The specific steps are as follows: applying photoresist, exposure and pattern making (concentric annular gradient pattern), development, wet / dry etching, and photoresist stripping, thereby forming an annular electrode array with a dense center and gradually becoming sparser outwards. Finally, annealing is performed to improve the conductivity uniformity of the multiple electrode regions 10.

[0060] Optionally, the method further includes depositing a three-layer functional film via ALD atomic layer deposition, wherein the ultrathin silicon dioxide layer 16 is 2nm to 5nm, the high dielectric layer 12 is 8nm to 15nm, and the aluminum oxide layer 15 is 3nm to 6nm.

[0061] Optionally, the method further includes that the carrier layer 14 is a branched microporous dielectric film layer, the material of which the branched microporous dielectric film layer is deposited is silicon dioxide or silicon nitride, the thickness of the film layer is 1.0 μm to 3.0 μm, and it is the substrate of the carrier layer 14.

[0062] Optionally, the method also includes fabricating a carrier layer 14 by photolithography and dry etching, with the following fabrication sequence: applying a thick layer of photoresist, photolithography, loading radial main channels and branching patterns, developing and shaping, plasma dry etching to create micro-channels, removing the photoresist, and cleaning.

[0063] This application also provides a display device, which includes a timing controller and a display apparatus as described above. The timing controller is electrically connected to the display apparatus and is used to transmit timing signals of the display apparatus to the display apparatus.

[0064] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A display device, characterized in that, include: Multiple electrode regions, each of which is used to generate multiple electrons when energized; The reflector is located on the surface of the plurality of electrode regions; A high dielectric layer is located on the surface of the reflector opposite to the plurality of electrode regions. The high dielectric layer is used to acquire the plurality of electrons passing through the reflector. The high dielectric layer binds the plurality of electrons to form an electric field. The high dielectric layer continues to bind the plurality of electrons after the electrode regions are energized and de-energized. Multiple spaced black droplets are located on the side of the high-dielectric layer facing away from the reflector. Each droplet corresponds to an electrode region. When there is no electric field, the droplets spread out to make the area of ​​the droplet covering the reflector greater than or equal to a preset area, so that ambient light is reflected from the droplets as black light. When the electric field is present, the droplets contract to make the area of ​​the droplet covering the reflector smaller than the preset area, so that ambient light is reflected from the reflector as white light. The white light and the black light form an image.

2. The display device according to claim 1, characterized in that, The high dielectric layer includes a plurality of spaced high dielectric elements, each of which is corresponding to a droplet in the direction of the plurality of electrode regions toward the reflector. The orthographic projection of each high dielectric element in the direction of the plurality of electrode regions toward the reflector covers the orthographic projection of the corresponding droplet in the direction of the plurality of electrode regions toward the reflector. The electric field formed by the plurality of electrons of each high dielectric element covers the corresponding droplet.

3. The display device according to claim 2, characterized in that, The display device further includes a carrier layer disposed on the surface of the high-dielectric layer facing away from the reflector. The surface of the carrier layer facing away from the high-dielectric layer is provided with a plurality of blind holes. Each blind hole is correspondingly disposed with a high-dielectric element in the direction of the plurality of electrode areas toward the reflector. Each blind hole contains a droplet. The orthographic projection of each high-dielectric element in the direction of the plurality of electrode areas toward the reflector covers the orthographic projection of the corresponding blind hole in the direction of the plurality of electrode areas toward the reflector.

4. The display device according to claim 3, characterized in that, The surface of the carrier layer facing away from the high dielectric layer is further provided with a plurality of spaced receiving grooves. Each blind hole is a circular hole, and each receiving groove is a rectangular groove. Each blind hole communicates with at least one receiving groove. The area of ​​the orthographic projection of each receiving groove in the direction of the plurality of electrode areas toward the reflector is smaller than the area of ​​the orthographic projection of each blind hole in the direction of the plurality of electrode areas toward the reflector. Each receiving groove is used to receive at least a portion of a droplet.

5. The display device according to claim 4, characterized in that, Each blind hole communicates with a plurality of receiving slots, which are spaced apart circumferentially from the blind holes. Each receiving slot includes a first slot and a second slot. The orthographic projection of the first slot onto the direction of the plurality of electrode areas toward the reflector and the orthographic projection of the second slot onto the direction of the plurality of electrode areas toward the reflector are both rectangular. The area of ​​the orthographic projection of the first slot onto the direction of the plurality of electrode areas toward the reflector is greater than the area of ​​the orthographic projection of the second slot onto the direction of the plurality of electrode areas toward the reflector.

6. The display device according to claim 3, characterized in that, The display device further includes an aluminum oxide layer disposed between the high dielectric layer and the carrier layer. The aluminum oxide layer is used to block the plurality of electrons from escaping to the carrier layer. The aluminum oxide layer includes a plurality of aluminum oxide elements. Each high dielectric element and one aluminum oxide element are correspondingly disposed in the plurality of electrode areas in the direction toward the reflector. The orthographic projection of each high dielectric element in the direction toward the reflector overlaps with the orthographic projection of the corresponding aluminum oxide element in the direction toward the reflector.

7. The display device according to claim 3, characterized in that, The display device further includes a silicon dioxide layer disposed between the reflector and the high-dielectric layer. The silicon dioxide layer is used to prevent the multiple electrons of the high-dielectric layer from escaping. The silicon dioxide layer includes multiple spaced silicon dioxide elements, each of which corresponds to one of the high-dielectric elements in the direction of the multiple electrode regions toward the reflector. The orthographic projection of each silicon dioxide element in the direction of the multiple electrode regions toward the reflector overlaps with the orthographic projection of the corresponding high-dielectric element in the direction of the multiple electrode regions toward the reflector.

8. The display device according to claim 2, characterized in that, In the direction of the plurality of electrode regions toward the reflector, each of the high-dielectric elements is at the same distance from the corresponding droplet.

9. A manufacturing method, characterized in that, include: Fabrication of the first substrate; Multiple electrode regions are fabricated on the first substrate by magnetron sputtering deposition, and each electrode region is used to generate multiple electrons when energized; A reflector is fabricated on the surface of the plurality of electrode regions; A high-dielectric layer is formed on the surface of the reflector facing away from the plurality of electrode regions. The high-dielectric layer is used to acquire the plurality of electrons passing through the reflector. The high-dielectric layer binds the plurality of electrons to form an electric field. The high-dielectric layer continues to bind the plurality of electrons after the electrode regions are energized and de-energized. Multiple spaced black droplets are disposed on the side of the high dielectric layer facing away from the reflector. Each droplet corresponds to an electrode region. When there is no electric field, the droplets spread out to make the area of ​​the droplet covering the reflector greater than or equal to a preset area, so that ambient light is reflected from the droplets as black light. When the electric field is present, the droplets contract to make the area of ​​the droplet covering the reflector less than the preset area, so that ambient light is reflected from the reflector as white light. The white light and the black light form the image.

10. A display device, characterized in that, The device includes a timing controller and a display device as described in any one of claims 1 to 8, wherein the timing controller is electrically connected to the display device and is used to transmit timing signals of the display device to the display device.

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