Electronic paper display panel and electronic paper display device

Abstract

This application provides an electronic paper display panel and an electronic paper display device. The electronic paper display panel includes: a substrate and an array substrate stacked together, multiple pixel electrodes, and multiple receiving cavities corresponding to the multiple pixel electrodes; the receiving cavities are filled with reactants, multiple first charged particles, and multiple second charged particles; wherein the surface of the first charged particles is coated with a first photocatalyst, and the surface of the second charged particles is coated with a second photocatalyst; an elastic film is disposed on the side of the receiving cavity opposite to the substrate. The first photocatalyst can cause the reactants to decompose under light and generate gas, causing the elastic film to bulge; the second photocatalyst can cause the gas to undergo a chemical reaction under light and generate reactants, causing the elastic film to recover its deformation. This electronic paper display panel can achieve tactile display by controlling the deformation of the elastic film under ambient light.

Description

Technical Field

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

[0002] Existing e-paper technology boasts advantages such as bistable operation, low power consumption, and clear display under strong light. However, it relies solely on visual output and cannot provide tactile information acquisition for the blind and deaf, thus hindering their effective use of e-paper content. Furthermore, traditional tactile display technologies (such as piezoelectric and electrostrictive technologies) have low integration with e-paper display units, slow response times, and require additional power for operation, making them difficult to adapt to the low-power characteristics of e-paper and hindering the synergy between e-paper and tactile displays. Summary of the Invention

[0003] The display panel and electronic paper display device provided in this application are intended to solve the problem that existing electronic paper display panels are difficult to implement tactile display functions.

[0004] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide an electronic paper display panel, comprising: A substrate and an array substrate are stacked together; a plurality of pixel electrodes are disposed at intervals on the surface of the array substrate facing away from the substrate; an insulating layer is disposed between adjacent pixel electrodes; adjacent insulating layers cooperate with the array substrate to form a plurality of receiving cavities corresponding to the plurality of pixel electrodes; the receiving cavities are filled with reactants, a plurality of first charged particles and a plurality of second charged particles; A common electrode is disposed opposite to the plurality of pixel electrodes; when the pixel electrodes and the common electrode are energized, an electric field is generated and the first charged particle and the second charged particle are controlled to move along the stacking direction of the display panel. The first charged particle is coated with a first photocatalyst, and the second charged particle is coated with a second photocatalyst; an elastic film is disposed on the side of the receiving cavity away from the substrate; In response to the first charged particle moving to the side of the containment cavity away from the substrate, the first photocatalyst can cause the reactants to decompose and generate gas under light irradiation, and cause the elastic film to bulge. In response to the second charged particle moving to the side of the containment cavity away from the substrate, the second photocatalyst can cause the gas to undergo a chemical reaction under light irradiation and produce reactants, and cause the elastic film to recover its deformation.

[0005] In one specific embodiment, it further includes: A breathable membrane is disposed between the elastic film and the pixel electrode, and divides the receiving cavity into a reaction chamber facing the substrate and a gas chamber facing away from the substrate; the gas can flow between the reaction chamber and the gas chamber through the breathable membrane; The reactants, the first charged particle, and the second charged particle are disposed within the reaction chamber; the common electrode is disposed on the side of the breathable membrane facing the elastic film.

[0006] In one specific embodiment, in response to the first charged particle moving to the side of the reaction chamber away from the substrate, the first photocatalyst can cause the reactants to decompose under light and generate gas, and the gas enters the gas chamber through the gas-permeable membrane and causes the elastic film to bulge. In response to the gas propelling the reactant away from the surface of the first charged particle, the reactant ceases to undergo a decomposition reaction.

[0007] In one specific embodiment, in response to the second charged particle moving to the side of the reaction chamber away from the substrate, the second photocatalyst can cause the gas to undergo a chemical reaction and produce reactants under light irradiation, and the gas in the gas chamber enters the reaction chamber through the gas-permeable membrane and causes the elastic film to recover its deformation; In response to the reactants flooding the second charged particles, the reactants cease to undergo a combination reaction.

[0008] In one specific embodiment, the reactant is a liquid; the reactant includes formic acid; the gas includes carbon dioxide and hydrogen. The first photocatalyst comprises a palladium / graphite phase carbon nitride catalyst and / or a cadmium sulfide catalyst; the second photocatalyst comprises at least one of a ruthenium compound, an iridium compound, indium oxide, and zirconium dioxide.

[0009] In one specific embodiment, the reactant is a gas; the reactant includes nitrogen tetroxide; the gas includes nitrogen dioxide. The first photocatalyst comprises tungsten trioxide and / or iron-doped tungsten trioxide; the second photocatalyst comprises silver-modified titanium dioxide.

[0010] To solve the above-mentioned technical problems, another technical solution adopted in this application is: to provide an electronic paper display panel, comprising: A substrate and an array substrate are stacked together; a plurality of pixel electrodes are disposed at intervals on the surface of the array substrate facing away from the substrate; an insulating layer is disposed between adjacent pixel electrodes; adjacent insulating layers cooperate with the array substrate to form a plurality of receiving cavities corresponding to the plurality of pixel electrodes; the receiving cavities are filled with a plurality of first charged particles and a plurality of second charged particles; A common electrode is disposed opposite to the plurality of pixel electrodes; when the pixel electrodes and the common electrode are energized, an electric field is generated and the first charged particle and the second charged particle are controlled to move along the stacking direction of the display panel. The first charged particle is coated with a photocatalytic adsorption and desorption layer; an elastic film is provided on the side of the receiving cavity away from the substrate. In response to the first charged particle moving to the side of the cavity away from the substrate, the photocatalytic adsorption-desorption layer can undergo a desorption reaction under light irradiation and generate gas, causing the elastic film to bulge. In response to the second charged particle moving to the side of the cavity away from the substrate and blocking light, and the first charged particle moving to the side of the cavity facing the substrate, the photocatalytic adsorption-desorption layer can adsorb the gas and cause the elastic film to recover its deformation.

[0011] In one specific embodiment, the photocatalytic adsorption-desorption layer includes a porous framework structure and an azobenzene photoresponsive unit connected to the inner surface of the porous framework structure; The porous framework structure may include at least one of metal-organic framework, porous carbon, and porous silica.

[0012] In one specific embodiment, the gas includes at least one of nitrogen, carbon dioxide, or alkane gases.

[0013] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide an electronic paper display device, including an electronic paper display panel as described in any of the above claims.

[0014] The beneficial effects of this application embodiment are as follows: Unlike the prior art, this application embodiment provides an electronic paper display panel, which includes: a substrate and an array substrate stacked together; a plurality of pixel electrodes are spaced apart on the side surface of the array substrate away from the substrate; an insulating layer is disposed between adjacent pixel electrodes; adjacent insulating layers cooperate with the array substrate to form a plurality of receiving cavities corresponding to the plurality of pixel electrodes; the receiving cavities are filled with reactants, a plurality of first charged particles and a plurality of second charged particles; a common electrode is disposed opposite to the plurality of pixel electrodes; when the pixel electrodes and the common electrode are energized, an electric field is generated and the first charged particles and the second charged particles are controlled to move along the stacking direction of the display panel; wherein, the surface of the first charged particles is coated with a first photocatalyst, and the surface of the second charged particles is coated with a second photocatalyst; an elastic film is disposed on the side of the receiving cavity away from the substrate. In response to a first charged particle moving to the side of the cavity away from the substrate, a first photocatalyst decomposes the reactants and generates gas under illumination, causing the elastic film to bulge. In response to a second charged particle moving to the side of the cavity away from the substrate, a second photocatalyst reacts the gas under illumination, generating reactants and restoring the elastic film's deformation. By coating the surface of the first charged particle with the first photocatalyst, when the electric field controls the first charged particle to move to the side of the cavity away from the substrate, the first photocatalyst can cause the reactants to decompose and generate gas under ambient light irradiation, thereby increasing the gas volume within the cavity and driving the elastic film to deform and bulge. Simultaneously, by coating the surface of the second charged particle with the second photocatalyst, when the electric field controls the second charged particle to move to the side of the cavity away from the substrate, the second photocatalyst can cause the gas within the cavity to react and form reactants under ambient light irradiation, thereby decreasing the gas volume within the cavity and restoring the elastic film's deformation. Thus, tactile display is achieved by controlling the deformation of the elastic film corresponding to multiple pixels. Furthermore, by setting a first photocatalyst and a second photocatalyst, a tactile display driven by ambient light was realized on electronic paper, which also effectively reduced the energy consumption of the electronic paper display panel. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the electronic paper display panel provided in the first embodiment of this application; Figure 2 for Figure 1 The image shows a cross-sectional view of the electronic paper display panel along line AA. Figure 3a for Figure 2 A schematic diagram of the structure of the first charged particle shown. Figure 3b for Figure 2 A schematic diagram of the structure of the second charged particle shown. Figure 4 This is a cross-sectional view along line AA of the electronic paper display panel provided in the second embodiment of this application; Figure 5 This is a schematic diagram of the structure of the first charged particle in the electronic paper display panel provided in the third embodiment of this application; Figure 6 A simplified structural diagram of the electronic paper display device provided in the fourth embodiment of this application.

[0016] Explanation of icon numbers: 100-Electronic paper display panel; 1-Substrate; 2-Array substrate; 3-Pixel electrode; 4-Insulating layer; 5-Reactant; 6-First charged particle; 7-Second charged particle; 8-Common electrode; 9-Gas-permeable membrane; 10-Containing cavity; 20-Reaction chamber; 30-Gas chamber; 41-First insulating layer; 42-Second insulating layer; 61-First photocatalyst; 62-Photocatalytic adsorption-desorption layer; 71-Second photocatalyst; 101-Elastic film. Detailed Implementation

[0017] The technical solutions of the embodiments of this application 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 this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0019] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] See Figures 1-3b , Figure 1 This is a schematic diagram of the structure of the electronic paper display panel provided in the first embodiment of this application; Figure 2 for Figure 1 The image shows a cross-sectional view of the electronic paper display panel along line AA. Figure 3a for Figure 2 A schematic diagram of the structure of the first charged particle shown. Figure 3b for Figure 2 A schematic diagram of the structure of the second charged particle in the diagram is shown. The first embodiment of this application provides an electronic paper display panel 100, which can be used to display Braille and achieve tactile display. The electronic paper display panel 100 may include a substrate 1 and an array substrate 2 stacked together, multiple pixel electrodes 3, multiple receiving cavities 10 corresponding to the multiple pixel electrodes 3, and a common electrode 8.

[0022] The substrate 1 can be a glass plate, used to support other structures of the electronic paper display panel 100. An array substrate 2 is stacked on one side surface of the substrate 1, used to transmit electrical signals to the pixel electrode 3. The array substrate 2 may include multiple thin-film transistors (not shown) for controlling the transmission of electrical signals. The structure and function of the thin-film transistors are the same as or similar to those in the prior art; for details, please refer to the prior art, which will not be repeated here.

[0023] Multiple pixel electrodes 3 are spaced apart on the surface of the array substrate 2 away from the substrate 1. A common electrode 8 is disposed opposite to the multiple pixel electrodes 3. When the pixel electrodes 3 and the common electrode 8 are energized, an electric field is generated. The multiple pixel electrodes 3 are arranged in an array on the surface of the array substrate 2, and each pixel electrode 3 corresponds to a thin-film transistor and receives data signals from the thin-film transistor.

[0024] An insulating layer 4 is disposed between adjacent pixel electrodes 3. The insulating layer 4 extends from the surface of the array substrate 2 along the stacking direction Y of the electronic paper display panel 100 toward the side opposite to the substrate 1, so as to isolate adjacent pixel electrodes 3. The adjacent insulating layers 4 cooperate with the array substrate 2 to form a plurality of receiving cavities 10 corresponding to the plurality of pixel electrodes 3. By disposing of the insulating layer 4 between adjacent pixel electrodes 3, it is ensured that the electric field generated by each pixel electrode 3 can only act within the corresponding receiving cavity 10, avoiding any impact on adjacent receiving cavities 10.

[0025] Each cavity 10 is filled with reactant 5, multiple first charged particles 6, and multiple second charged particles 7. The first charged particles 6 can be negatively charged black particles, and the second charged particles 7 can be positively charged white particles. The electric field generated by the pixel electrode 3 and the common electrode 8 acts on the corresponding cavity 10, controlling the movement of the first charged particles 6 and the second charged particles 7 along the stacking direction Y of the electronic paper display panel 100 within the reactant 5.

[0026] Specifically, under the influence of the electric field generated by the pixel electrode 3 and the common electrode 8, one of the first charged particle 6 and the second charged particle 7 moves to the side of the receiving cavity 10 facing the substrate 1, and the other moves to the side of the receiving cavity 10 away from the substrate 1. For example, the black first charged particle 6 can move to the side of the receiving cavity 10 away from the substrate 1 under the influence of the electric field, while the white second charged particle 7 moves to the side of the receiving cavity 10 facing the substrate 1 to display a black image; or the black first charged particle 6 moves to the side of the receiving cavity 10 facing the substrate 1, while the white second charged particle 7 moves to the side of the receiving cavity 10 away from the substrate 1 to display a white image.

[0027] Specifically, the surface of the first charged particle 6 is coated with a first photocatalyst 61, and the surface of the second charged particle 7 is coated with a second photocatalyst 71. A photocatalyst is a material that can absorb photons under light to generate electron-hole pairs (excitons) and initiate a chemical reaction; wherein, the first photocatalyst 61 can initiate the decomposition reaction of reactant 5 to produce gas under light, and the second photocatalyst 71 can initiate the combination reaction of the gas in the containment cavity 10 to produce reactant 5 under light.

[0028] An elastic film 101 is provided on the side of the receiving cavity 10 away from the substrate 1. The elastic film 101 can deform under the action of external force and recover its deformation after the external force is removed. Specifically, the elastic film 101 is connected to the end of the insulating layer 4 away from the array substrate 2 and cooperates with the array substrate 2 to form the receiving cavity 10.

[0029] In response to the first charged particle 6 moving to the side of the cavity 10 away from the substrate 1, the first photocatalyst 61 can cause the reactant 5 to decompose and generate gas under light irradiation, and cause the elastic film 101 to bulge.

[0030] By coating the surface of the first charged particle 6 with the first photocatalyst 61, so that when the electric field controls the first charged particle 6 to move to the side of the containment cavity 10 away from the substrate 1 and display a black image, the first photocatalyst 61 can cause the reactant 5 to decompose and generate gas under ambient light irradiation. This increases the gas volume in the containment cavity 10, thereby driving the elastic film 101 to deform and bulge, forming tactile feedback.

[0031] In response to the second charged particle 7 moving to the side of the cavity 10 away from the substrate 1, the second photocatalyst 71 can cause the gas to undergo a chemical reaction under light and produce reactant 5, and cause the elastic film 101 to recover its deformation.

[0032] By coating the surface of the second charged particle 7 with the second photocatalyst 71, so that when the electric field controls the second charged particle 7 to move to the side of the containment cavity 10 away from the substrate 1 and display a white image, the second photocatalyst 71 can cause the gas in the containment cavity 10 to undergo a chemical reaction to form reactant 5 under ambient light irradiation conditions, thereby reducing the gas volume in the containment cavity 10 so that the elastic film 101 can recover its deformation.

[0033] Thus, tactile display is achieved by controlling the deformation of the elastic film 101 corresponding to multiple pixels. In addition, by setting the first photocatalyst 61 and the second photocatalyst 71, tactile display driven by ambient light is realized on the electronic paper, which also effectively reduces the energy consumption of the electronic paper display panel 100.

[0034] Of course, in some other embodiments, a first catalyst may be coated on the surface of white charged particles and a second catalyst may be coated on the surface of black charged particles, so that when displaying a white image, the elastic film 101 will bulge and form tactile feedback, and when displaying a black image, the elastic film 101 will restore its deformation.

[0035] like Figure 2 As shown, in a specific embodiment, the electronic paper display panel 100 may further include a breathable membrane 9; the breathable membrane 9 is disposed between the elastic film 101 and the pixel electrode 3, and divides the receiving cavity 10 into a reaction chamber 20 facing the substrate 1 and a gas chamber 30 facing away from the substrate 1. That is, in the lamination direction Y, the breathable membrane 9 divides each receiving cavity 10 into a reaction chamber 20 located below and a gas chamber 30 located above.

[0036] In each containment cavity 10, reactant 5, first charged particle 6 and second charged particle 7 are disposed in the corresponding reaction chamber 20; common electrode 8 is disposed on the side of gas-permeable membrane 9 facing elastic film 101, that is, common electrode 8 is disposed in the corresponding gas chamber 30.

[0037] In this system, gas can flow between reaction chamber 20 and gas chamber 30 through the permeable membrane 9. Specifically, when reactant 5 decomposes in reaction chamber 20 to produce gas, the gas pressure in reaction chamber 20 increases. Gas flows from the higher-pressure reaction chamber 20 through the permeable membrane 9 into the lower-pressure gas chamber 30, causing the gas volume in gas chamber 30 to expand and deform the elastic membrane 101. When gas in reaction chamber 20 undergoes a combination reaction to form reactant 5, the gas pressure in reaction chamber 20 decreases. Gas flows from the higher-pressure gas chamber 30 through the permeable membrane 9 into the lower-pressure reaction chamber 20, causing the gas volume in gas chamber 30 to decrease and the elastic membrane 101 to return to its original shape.

[0038] Thus, by setting up a breathable membrane 9 to divide the receiving cavity 10 into a gas chamber 30 for realizing tactile feedback and a reaction chamber 20 for driving changes in gas volume, it is convenient that if a problem occurs in the gas chamber 30 or the reaction chamber 20 during the manufacturing process, only the problematic part of the structure can be replaced or remade, thereby effectively reducing manufacturing costs.

[0039] Specifically, the insulating layer 4 may include a first insulating layer 41 disposed between adjacent reaction chambers 20, and a second insulating layer 42 disposed between adjacent gas chambers 30. The first insulating layer 41 separates adjacent reaction chambers 20 to form multiple independent and sealed reaction chambers 20, so that the movement of the first charged particles 6 and the second charged particles 7 and the decomposition and combination reactions of the reactants 5 in each reaction chamber 20 remain independent, and the operation of adjacent reaction chambers 20 does not affect each other. The second insulating layer 42 separates adjacent gas chambers 30 to form multiple independent and sealed gas chambers 30, so that changes in the volume of gas in each gas chamber 30 do not affect adjacent gas chambers 30.

[0040] In a specific embodiment, in response to the first charged particle 6 moving to the side of the reaction chamber 20 away from the substrate 1, the first photocatalyst 61 can cause the reactant 5 to undergo a decomposition reaction and generate gas under light irradiation. The gas enters the gas chamber 30 through the gas permeable membrane 9 and causes the elastic film 101 to bulge. In response to the gas pushing the reactant 5 away from the surface of the first charged particle 6, the reactant 5 stops undergoing a decomposition reaction.

[0041] Thus, through the synergistic effect of the first charged particle 6, the first photocatalyst 61, the reactant 5, and the gas, the first charged particle 6 can be moved to the surface of the reaction chamber 20 and immediately trigger the decomposition reaction of the reactant 5 to accelerate the generation of tactile feedback; and the decomposition reaction stops after the reactant 5 on the surface of the reaction chamber 20 is consumed, so as to avoid the situation where excessive gas is generated, causing the elastic film 101 to deform beyond the elastic limit and fail or even break.

[0042] Specifically, when the first charged particle 6 moves to the surface of the reaction chamber 20 under the control of the electric field, external light can irradiate the first charged particle 6 and excite the first photocatalyst 61 on the surface of the first charged particle 6. The first photocatalyst 61 acts and catalyzes the decomposition reaction of the reactant 5 in contact with the first photocatalyst 61, thereby generating gas. It can be understood that the gas generated by the decomposition reaction increases the gas pressure in the reaction chamber 20, so as to drive the gas to quickly pass through the permeable membrane 9 into the gas chamber 30, which facilitates the acceleration of the time for generating tactile feedback. At the same time, the black first charged particle 6 can absorb external light and generate heat, further accelerating the decomposition reaction rate of the reactant 5.

[0043] Specifically, when the reactant 5 located on the surface of the reaction chamber 20 and in contact with the first photocatalyst 61 is decomposed, the first photocatalyst 61 is completely enveloped by the gas generated by the reactant 5. The first photocatalyst 61 no longer contacts the reactant 5, its catalytic effect is ineffective, the reactant 5 stops decomposing and stops generating gas, so as to avoid generating too much gas.

[0044] In a specific embodiment, in response to the second charged particle 7 moving to the side of the reaction chamber 20 away from the substrate 1, the second photocatalyst 71 can cause the gas to undergo a chemical reaction under light and generate reactant 5. The gas in the gas chamber 30 enters the reaction chamber 20 through the gas-permeable membrane 9 and causes the elastic film 101 to recover its deformation. In response to the reactant 5 submerging the second charged particle 7, the reactant 5 stops undergoing a chemical reaction.

[0045] Thus, through the synergistic effect of the first charged particle 6, the second photocatalyst 71, the gas, and the reactant 5, the second charged particle 7 can be moved to the surface of the reaction chamber 20 and immediately trigger a chemical reaction in the gas on the surface of the reaction chamber 20, thereby accelerating the speed at which the elastic film 101 recovers its deformation. After the reactant 5 produced by the chemical reaction refills the surface of the reaction chamber 20 and covers the second charged particle 7, the chemical reaction stops, so that the gas in the gas chamber 30 stops being consumed, avoiding the situation where excessive gas consumption leads to a prolonged time for subsequent tactile feedback.

[0046] Specifically, when the second charged particle 7 moves to the surface of the reaction chamber 20 under the control of the electric field, external light can irradiate the second charged particle 7 and excite the second photocatalyst 71 on the surface of the second charged particle 7. The second photocatalyst 71 acts and catalyzes the gas in contact with the second photocatalyst 71 to undergo a chemical reaction, thereby producing reactant 5. It can be understood that the chemical reaction of the gas reduces the gas pressure in the reaction chamber 20, so as to drive the gas in the gas chamber 30 to quickly pass through the permeable membrane 9 into the reaction chamber 20, which facilitates the acceleration of the recovery time of the elastic film 101. At the same time, the white second charged particle 7 can reflect external light to prevent external light from passing through the second charged particle 7 and irradiating the first charged particle 6 located at the bottom of the reaction chamber 20, thereby exciting the first photocatalyst 61 and triggering the decomposition reaction of reactant 5.

[0047] Specifically, when the gas located on the surface of the reaction chamber 20 and in contact with the second photocatalyst 71 is consumed, the second photocatalyst 71 is completely covered by the reactants 5 produced by the chemical reaction. The second photocatalyst 71 is no longer in contact with the gas, its catalytic effect is ineffective, the gas stops undergoing chemical reaction, and the production of reactants 5 stops, so as to avoid consuming too much gas.

[0048] Continue reading Figure 2 In a specific embodiment, reactant 5 can be a liquid. Specifically, reactant 5 may include formic acid, and the gas may include carbon dioxide and hydrogen. The first photocatalyst 61 includes a palladium / graphite phase carbon nitride catalyst and / or a cadmium sulfide catalyst; the second photocatalyst 71 includes at least one of a ruthenium compound, an iridium compound, indium oxide, and zirconium dioxide.

[0049] Specifically, when the first charged particle 6 moves to the surface of the reaction chamber 20, the first photocatalyst 61 generates excitons under light excitation and rapidly migrates to the surface of the first photocatalyst 61. The formic acid liquid in contact with the surface of the first photocatalyst 61 absorbs the excitons and undergoes a decomposition reaction, thereby generating carbon dioxide and hydrogen. The carbon dioxide and hydrogen enter the gas chamber 30 through the gas permeable membrane 9, causing the elastic film 101 to deform and bulge, forming tactile feedback.

[0050] During the decomposition reaction, the formic acid liquid level continues to drop under the combined effects of gravity and air pressure until the formic acid liquid level detaches from the first photocatalyst 61, at which point the formic acid decomposition reaction stops.

[0051] When the second charged particle 7 moves to the surface of the reaction chamber 20, the second photocatalyst 71 generates excitons under light excitation and rapidly migrates to the surface of the second photocatalyst 71. Carbon dioxide and hydrogen gas in contact with the surface of the second photocatalyst 71 absorb the excitons and undergo a combination reaction to generate formic acid. Carbon dioxide and hydrogen gas enter the reaction chamber 20 from the gas chamber 30 through the gas permeable membrane 9, and the gas volume in the gas chamber 30 decreases so that the elastic film 101 recovers its deformation.

[0052] During the duration of the chemical reaction, the formic acid level continues to rise as the formic acid level increases until it covers the entire second photocatalyst 71. After carbon dioxide and hydrogen are separated from the second photocatalyst 71, the chemical reaction between carbon dioxide and hydrogen stops.

[0053] Specifically, before the decomposition and combination reaction occurs, the gas chamber 30 is filled with carbon dioxide and hydrogen to accelerate the time required for the elastic film 101 to generate tactile feedback and recover its deformation.

[0054] Specifically, the time from the onset of the formic acid decomposition reaction to the generation of noticeable tactile feedback by the elastic membrane 101 is less than or equal to 1 second; specifically, this time can be any value among 0.2s, 0.4s, 0.6s, 0.8s, and 1s. The time from the onset of the combination reaction between carbon dioxide and hydrogen to the recovery of the elastic membrane 101's deformation is greater than or equal to 3s and less than or equal to 5s; specifically, this time can be any value among 3s, 3.5s, 4s, 4.5s, and 5s.

[0055] See Figure 4 , Figure 4 This is a cross-sectional view along line AA of the electronic paper display panel provided in the second embodiment of this application. The structure and function of the electronic paper display panel 100 provided in the second embodiment of this application are basically the same as those of the electronic paper display panel 100 provided in the first embodiment of this application. The difference is that in the second embodiment of this application, the reactant 5 can be a gas; specifically, the reactant 5 can include nitrogen tetroxide; the gas can include nitrogen dioxide; the first photocatalyst 61 can include tungsten trioxide and / or iron-doped tungsten trioxide; the second photocatalyst 71 can include silver-modified titanium dioxide. Specifically, before the decomposition and combination reaction occurs, the gas chamber 30 is filled with nitrogen dioxide to accelerate the time required for the elastic film 101 to generate tactile feedback and recover its deformation.

[0056] Specifically, when the first charged particle 6 moves to the surface of the reaction chamber 20, the nitrogen tetroxide gas in contact with the surface of the first photocatalyst 61 absorbs excitons and undergoes a decomposition reaction, thereby generating nitrogen dioxide with twice the volume. It can be understood that the heat generated by the absorption of light by the black first charged particle 6 causes thermal vibrations between gas molecules. Since the molecular mass of nitrogen tetroxide is much greater than that of nitrogen dioxide, the larger nitrogen tetroxide molecules can remain in the reaction chamber 20, while the smaller nitrogen dioxide molecules enter the gas chamber 30 through the permeable membrane 9, causing the elastic film 101 to deform and bulge, thus creating tactile feedback.

[0057] Meanwhile, during the duration of the decomposition reaction, the nitrogen tetroxide gas layer with a larger molecular weight gradually descends until it detaches from the first photocatalyst 61, at which point the nitrogen tetroxide decomposition reaction stops.

[0058] When the second charged particle 7 moves to the surface of the reaction chamber 20, the nitrogen dioxide in contact with the surface of the second photocatalyst 71 absorbs excitons and undergoes a chemical reaction to generate nitrogen tetroxide. Nitrogen dioxide enters the reaction chamber 20 from the gas chamber 30 through the gas-permeable membrane 9, and the gas volume in the gas chamber 30 decreases so that the elastic film 101 can recover its deformation.

[0059] During the duration of the chemical reaction, the volume of the nitrogen tetroxide gas layer continues to increase until the nitrogen tetroxide gas layer covers the entire second photocatalyst 71. After the nitrogen dioxide and the second photocatalyst 71 are separated, the nitrogen dioxide stops undergoing the chemical reaction.

[0060] Specifically, the time from the onset of the decomposition reaction of nitrogen tetroxide to the generation of noticeable tactile feedback by the elastic film 101 is less than or equal to 1 second; specifically, this time can be any value among 0.2s, 0.4s, 0.6s, 0.8s, and 1s. The time from the onset of the combination reaction of nitrogen dioxide to the recovery of the elastic film 101 from deformation is less than or equal to 1 second; specifically, this time can be any value among 0.2s, 0.4s, 0.6s, 0.8s, and 1s.

[0061] This application provides an electronic paper display panel 100. The electronic paper display panel 100 utilizes a first photocatalyst 61 coated on the surface of first charged particles 6. When the first charged particles 6 are moved by an electric field to the side of the receiving cavity 10 away from the substrate 1, the first photocatalyst 61, under ambient light irradiation, can cause the reactant 5 to decompose and generate gas. This increases the gas volume within the receiving cavity 10, causing the elastic film 101 to deform and bulge. Simultaneously, a second photocatalyst 71 is coated on the surface of second charged particles 7. When the second charged particles 7 are moved by an electric field to the side of the receiving cavity 10 away from the substrate 1, the second photocatalyst 71, under ambient light irradiation, can cause the gas within the receiving cavity 10 to undergo a chemical reaction to form reactant 5. This decreases the gas volume within the receiving cavity 10, allowing the elastic film 101 to recover its deformation. Thus, tactile display is achieved by controlling the deformation of the elastic film 101 corresponding to multiple pixels. Furthermore, by setting the first photocatalyst 61 and the second photocatalyst 71, a tactile display driven by ambient light is realized on the electronic paper, which also effectively reduces the energy consumption of the electronic paper display panel 100.

[0062] See Figure 5 , Figure 5 This is a schematic diagram of the structure of the first charged particle 6 in the electronic paper display panel provided in the third embodiment of this application. The structure and function of the electronic paper display panel 100 provided in the third embodiment of this application are basically the same as those of the electronic paper display panel 100 provided in the first embodiment of this application. The difference is that in the third embodiment of this application, the surface of the first charged particle 6 is coated with a photocatalytic adsorption and desorption layer 62.

[0063] It should be noted that under dark, room-temperature conditions without light, the ions on the surface of the photocatalytic adsorption-desorption layer 62 are positively charged, while the oxygen molecules near the photocatalytic adsorption-desorption layer 62 have a certain electron cloud density. There is a physical adsorption effect between the two. The ion transfers an unpaired electron to the gas molecule. The positively charged ion and the negatively charged gas molecule form a stable coordinate bond through strong electrostatic interaction, and the gas molecule is then adsorbed by the photocatalytic adsorption-desorption layer 62.

[0064] Under illumination, electrons in the aforementioned coordination compounds absorb photon energy and transition from the ground state to the excited state. The energy of the excited state weakens the electrostatic attraction between positively charged ions and negatively charged gas molecules. Electrons that were originally transferred to gas molecules are transferred back to the ions on the surface of the photocatalytic adsorption-desorption layer 62 under illumination. The released gas molecules diffuse from the interior of the photocatalytic adsorption-desorption layer 62 and re-enter the gas phase.

[0065] Specifically, in combination Figure 4 and Figure 5Both the reaction chamber 20 and the gas chamber 30 are filled with gas, and the surface of the second charged particle 7 is not covered with a photocatalyst and a photocatalytic adsorption-desorption layer 62.

[0066] In response to the first charged particle 6 moving to the side of the receiving cavity 10 away from the substrate 1, the photocatalytic adsorption-desorption layer 62 can undergo a desorption reaction under light irradiation to generate gas and cause the elastic film 101 to bulge. Specifically, when the electric field controls the first charged particle 6 to move to the side of the receiving cavity 10 away from the substrate 1 and displays a black image, the gas generated by the desorption reaction of the photocatalytic adsorption-desorption layer 62 under light irradiation increases the gas pressure in the reaction chamber 20, thereby driving the gas to quickly pass through the permeable membrane 9 into the gas chamber 30. The gas volume in the gas chamber 30 expands, causing the elastic film 101 to deform and bulge.

[0067] Furthermore, the photocatalytic adsorption-desorption layer 62 can only adsorb a limited number of gas molecules. After the desorption reaction releases all the gas molecules, it will automatically stop to avoid the situation where excessive gas is generated, causing the elastic film 101 to deform beyond its elastic limit and fail or even break.

[0068] In response to the second charged particle 7 moving to the side of the containment cavity 10 away from the substrate 1 and blocking light, and the first charged particle 6 moving to the side of the containment cavity 10 facing the substrate 1, the photocatalytic adsorption-desorption layer 62 can adsorb gas and cause the elastic film 101 to recover its deformation. Specifically, when the electric field controls the second charged particle 7 to move to the side of the containment cavity 10 away from the substrate 1 and display a white image, the photocatalytic adsorption-desorption layer 62 adsorbs the gas in the reaction chamber 20 under the condition of no light, thereby reducing the gas pressure in the reaction chamber 20. Under the pressure drive, the gas in the gas chamber 30 enters the reaction chamber 20 through the gas permeable membrane 9, and the gas volume in the gas chamber 30 decreases, causing the elastic film 101 to recover its deformation.

[0069] Furthermore, the photocatalytic adsorption and desorption layer 62 can only adsorb a limited number of gas molecules. Once a certain amount is reached, it will automatically stop adsorbing gas, thus stopping the consumption of gas in the gas chamber 30 and preventing excessive gas consumption from causing a prolonged time for subsequent tactile feedback.

[0070] Thus, by coating the surface of the first charged particle 6 with a photocatalytic adsorption and desorption layer 62, the functions of generating and absorbing gas are integrated, eliminating the need for multiple photocatalysts and reactants 5, and effectively reducing the process difficulty and manufacturing cost.

[0071] In a specific embodiment, the photocatalytic adsorption-desorption layer 62 includes a porous framework structure (not shown) and azobenzene photoresponsive units (not shown) connected to the inner surface of the porous framework structure. The porous framework structure provides a high specific surface area and a uniformly distributed pore structure, offering numerous active sites for gas molecule adsorption. Under light irradiation, the azobenzene photoresponsive units undergo molecular isomerization, altering the surface charge distribution of the material, weakening the adsorption force between gas molecules and the framework, and promoting gas desorption.

[0072] The porous framework structure can include at least one of metal-organic frameworks, porous carbon, and porous silica. Specifically, if a metal-organic framework is used, the azobenzene photoresponsive unit can be connected to its inner surface through coordination bonds. If porous carbon is used, its inner surface can be modified with azophenyl groups through covalent bonds. If porous silica is used, its inner surface can be silanized to introduce azobenzene photoresponsive units.

[0073] Specifically, the gas may include at least one of nitrogen, carbon dioxide, or alkane gases, so as to cooperate with the first charged particle 6 and the photocatalytic adsorption-desorption layer 62 to release or adsorb the gas molecules.

[0074] See Figure 6 , Figure 6 This is a simplified structural diagram of the electronic paper display device provided in the fourth embodiment of this application. The fourth embodiment of this application provides an electronic paper display device that can be used to display Braille and achieve tactile display. The electronic paper display device may include the electronic paper display panel 100 involved in any of the above embodiments. This electronic paper display device can achieve tactile display by controlling the deformation of the elastic film 101 under ambient light.

[0075] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An electronic paper display panel, characterized in that, include: A substrate and an array substrate stacked together; The array substrate has multiple pixel electrodes spaced apart on the side surface opposite to the substrate. An insulating layer is disposed between adjacent pixel electrodes; the adjacent insulating layers cooperate with the array substrate to form a plurality of receiving cavities corresponding to the plurality of pixel electrodes; the receiving cavities are filled with reactants, a plurality of first charged particles and a plurality of second charged particles; A common electrode is disposed opposite to the plurality of pixel electrodes; when the pixel electrodes and the common electrode are energized, an electric field is generated and the first charged particle and the second charged particle are controlled to move along the stacking direction of the display panel. The first charged particle is coated with a first photocatalyst, and the second charged particle is coated with a second photocatalyst; an elastic film is disposed on the side of the receiving cavity away from the substrate; In response to the first charged particle moving to the side of the containment cavity away from the substrate, the first photocatalyst can cause the reactants to decompose and generate gas under light irradiation, and cause the elastic film to bulge. In response to the second charged particle moving to the side of the containment cavity away from the substrate, the second photocatalyst can cause the gas to undergo a chemical reaction under light irradiation and produce reactants, and cause the elastic film to recover its deformation.

2. The electronic paper display panel according to claim 1, characterized in that, Also includes: A breathable membrane is disposed between the elastic film and the pixel electrode, and divides the receiving cavity into a reaction chamber facing the substrate and a gas chamber facing away from the substrate; the gas can flow between the reaction chamber and the gas chamber through the breathable membrane; The reactants, the first charged particle, and the second charged particle are disposed within the reaction chamber; the common electrode is disposed on the side of the breathable membrane facing the elastic film.

3. The electronic paper display panel according to claim 2, characterized in that, In response to the first charged particle moving to the side of the reaction chamber away from the substrate, the first photocatalyst can cause the reactants to decompose under light and generate gas, and the gas enters the gas chamber through the gas-permeable membrane and causes the elastic film to bulge. In response to the gas propelling the reactant away from the surface of the first charged particle, the reactant ceases to undergo a decomposition reaction.

4. The electronic paper display panel according to claim 2, characterized in that, In response to the second charged particle moving to the side of the reaction chamber away from the substrate, the second photocatalyst can cause the gas to undergo a chemical reaction and produce reactants under light irradiation, and the gas in the gas chamber enters the reaction chamber through the gas-permeable membrane and causes the elastic film to recover its deformation; In response to the reactants flooding the second charged particles, the reactants cease to undergo a combination reaction.

5. The electronic paper display panel according to claim 1, characterized in that, The reactants are liquids; the reactants include formic acid; the gases include carbon dioxide and hydrogen. The first photocatalyst comprises a palladium / graphite phase carbon nitride catalyst and / or a cadmium sulfide catalyst; the second photocatalyst comprises at least one of a ruthenium compound, an iridium compound, indium oxide, and zirconium dioxide.

6. The electronic paper display panel according to claim 1, characterized in that, The reactant is a gas; the reactant includes nitrogen tetroxide; the gas includes nitrogen dioxide. The first photocatalyst comprises tungsten trioxide and / or iron-doped tungsten trioxide; the second photocatalyst comprises silver-modified titanium dioxide.

7. An electronic paper display panel, characterized in that, include: A substrate and an array substrate stacked together; The array substrate has multiple pixel electrodes spaced apart on the side surface opposite to the substrate. An insulating layer is disposed between adjacent pixel electrodes; the adjacent insulating layers cooperate with the array substrate to form a plurality of receiving cavities corresponding to the plurality of pixel electrodes; the receiving cavities are filled with a plurality of first charged particles and a plurality of second charged particles; A common electrode is disposed opposite to the plurality of pixel electrodes; when the pixel electrodes and the common electrode are energized, an electric field is generated and the first charged particle and the second charged particle are controlled to move along the stacking direction of the display panel. The first charged particle is coated with a photocatalytic adsorption and desorption layer; an elastic film is provided on the side of the receiving cavity away from the substrate. In response to the first charged particle moving to the side of the cavity away from the substrate, the photocatalytic adsorption-desorption layer can undergo a desorption reaction under light irradiation and generate gas, causing the elastic film to bulge. In response to the second charged particle moving to the side of the cavity away from the substrate and blocking light, and the first charged particle moving to the side of the cavity facing the substrate, the photocatalytic adsorption-desorption layer can adsorb the gas and cause the elastic film to recover its deformation.

8. The electronic paper display panel according to claim 7, characterized in that, The photocatalytic adsorption-desorption layer includes a porous framework structure and an azobenzene photoresponsive unit connected to the inner surface of the porous framework structure. The porous framework structure may include at least one of metal-organic framework, porous carbon, and porous silica.

9. The electronic paper display panel according to claim 7, characterized in that, The gas includes at least one of nitrogen, carbon dioxide, or alkane gases.

10. An electronic paper display device, characterized in that, Includes the electronic paper display panel as described in any one of claims 1-9.

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