Electrowetting display device structure and packaging method thereof

Abstract

The present invention discloses an electrowetting display device structure and a packaging method thereof, wherein the electrowetting display device structure comprises an upper substrate and a lower substrate arranged relatively to each other, wherein the upper substrate comprises a first substrate, a first electrode and a conductive pixel wall in sequence along a direction toward the lower substrate, wherein the conductive pixel wall forms a pixel grid, and the lower substrate comprises a second substrate, a second electrode and a hydrophobic insulating layer in sequence along a direction toward the upper substrate, wherein an adjustment area is formed between the upper substrate and the lower substrate, wherein the adjustment area is filled with mutually immiscible polar liquid and non-polar liquid, and the end of the conductive pixel wall extends into the non-polar liquid. The present invention can avoid the defects caused by surface modification of the hydrophobic insulating layer material and high-temperature reflow by arranging the conductive pixel wall on the upper substrate, and completely ensure that the original characteristics of the surface of the hydrophobic insulating layer are not destroyed, thereby improving the reliability of the electrowetting optical device.

Description

Technical Field

[0001] The present invention relates to the technical field of electrowetting, and in particular to an electrowetting display device structure and a packaging method thereof. Background Art

[0002] Electrowetting: Electrowetting (Electrowetting, EW) refers to the phenomenon of changing the wettability of droplets on the substrate by changing the voltage between the droplets and the hydrophobic dielectric layer, that is, changing the contact angle, causing the droplets to deform and displace. The electrowetting display is a reflective display device based on the principle of electrowetting. It reflects external light sources through inks of different colors to achieve a full-color display effect. Electrowetting displays have the advantages of low energy consumption, wide color gamut, high response, high contrast, and visual health. Therefore, they are considered to be one of the mainstream display technologies in the future. In recent years, the demand for foldable and convenient display devices has been increasing, and more and more research has been conducted on flexible display devices. The pixel structure in the electrowetting device is driven by soft materials such as oil and water. Electrowetting display devices have natural advantages and potential in the field of flexibility.

[0003] See also Figure 1The basic structure of the electrowetting device is composed of two upper and lower substrates and two immiscible polar liquids 10' and non-polar solution 9' filled in the sealed cavity formed by the two substrates. The lower substrate includes a lower support plate 4', a first electrode 5', a hydrophobic insulating layer (or an insulating layer coated with a hydrophobic material on the surface) 6', and a pixel wall 7'. The upper substrate includes an upper support plate 1', a second electrode 2', a sealing frame 3' and a support column structure 8'. The pixel grid area surrounded by the pixel walls is the display area. The hydrophobicity of the material of the pixel wall 7' is lower than the hydrophobicity of the hydrophobic insulating layer 6', and the affinity of the pixel wall 7' to the polar liquid 10' and the non-polar solution 9' makes the wettability of the polar liquid 10' on the surface of the pixel wall 7' better, so that the non-polar solution 9' can be controlled to be filled in each pixel grid and the hydrophilicity of the pixel wall 7' isolates the non-polar liquid 9' in each pixel. The materials used in the electrowetting device are generally transparent materials, except that the non-polar solution 9' is mostly colored opaque materials or low-transmittance materials. The transmittance of the material here generally depends on the application direction of the electrowetting device. The preparation process of the above-mentioned flexible electrowetting device structure is to coat a hydrophobic insulating layer 6' on the lower support plate 4' with the first electrode 5' by spin coating, screen printing, slit coating and other methods. Then a layer of photoresist is coated on the surface of the hydrophobic insulating layer 6' to prepare the pixel wall, but because the surface energy of the hydrophobic insulating layer 6' is very low and has a very low contact angle hysteresis, such as Teflon AF1600 forward contact angle 124±2°, backward contact angle 113±2°, it is difficult to coat a uniform photoresist film on the surface of the hydrophobic insulating layer 6'. The method currently adopted by most electrowetting devices is to change the hydrophilicity of the surface of the hydrophobic insulating layer 6' through the plasma modification method to make the photoresist easier to coat on its surface. After the surface modification, the contact angle hysteresis of the hydrophobic insulating layer 6' increases, the surface adhesion increases, and it is easier for the photoresist to form a film on its surface. After the photoresist film curing, photolithography, and development are completed, in order to restore the hydrophobicity of the surface of the modified hydrophobic insulating layer 6', it is necessary to heat at high temperature to make the fresh fluororesin material at the bottom of the hydrophobic insulating layer 6' flow back to the surface, and to make the fluororesin material with poor surface hydrophobicity flow back to the bottom, and at the same time, restore the surface flatness at high temperature to restore the hydrophobicity of the surface of the hydrophobic insulating layer 6'.

[0004] It can be seen that the current traditional electrowetting devices need to involve the modification of the surface of the hydrophobic insulating layer 6' in the preparation process, so as to ensure that the photoresist is more easily coated on the surface of the hydrophobic layer to form a uniform film, so the pixel wall 7' needs to adopt the method of high-temperature reflux to restore the hydrophobicity of the surface of the hydrophobic insulating layer 6' after completion. By heating the modified film to above the melting point, the components with low surface energy in the film move from the main body to the surface, and the components containing oxygen atoms move from the surface to the main body, which causes fresh hydrophobic groups to be exposed on the surface, and the hydrophobicity is restored. However, high-temperature reflux cannot fully restore the hydrophobicity of the hydrophobic insulating layer 6' to the characteristics before modification, which will cause the hysteresis angle to increase. This has caused the shrinkage and spreading of the non-polar solution 9' of the device to produce problems during opening and closing. At the same time, the temperature of high-temperature reflux is high, and the lower support plate 4' is easily affected by high temperature and deformed and bent, thereby affecting the bending performance of the flexible electrowetting display device. The high-temperature reflow operation is also likely to cause deformation of the pixel wall 7' structure, thereby affecting the optoelectronic performance and stability of the device. The difference in properties between the surface of the hydrophobic insulating layer covered by the pixel wall 7' and the surface of the hydrophobic insulating layer 6' exposed in the cavity, as well as the impurities remaining during the development of the pixel wall 7' can all cause the electrowetting device to fail.

[0005] In addition, in order to prevent short circuit problems caused by interlayer cross-current during the bending process of the device, a traditional electrowetting device usually has a support column structure 8' on the upper support plate 1'. To ensure device performance, the upper and lower substrates need to be precisely aligned to achieve packaging. Due to the limitation of process accuracy, the support column structure 8' and the pixel wall 7' are easily misaligned, thereby affecting the flatness of the upper and lower substrates, and the performance stability and yield of the device will be affected. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an electrowetting display device structure and a packaging method thereof, which can avoid the defects caused by surface modification of the hydrophobic insulating layer material and high-temperature reflow, and completely ensure that the original characteristics of the hydrophobic insulating layer surface are not destroyed, thereby improving the reliability of the electrowetting optical device.

[0007] The technical solution adopted by the present invention is:

[0008] According to a first aspect of the present invention, there is provided an electrowetting display device structure, comprising an upper substrate and a lower substrate arranged opposite to each other, wherein the upper substrate comprises a first substrate, a first electrode and a conductive pixel wall in sequence along a direction toward the lower substrate, wherein the conductive pixel wall forms a pixel grid, and the lower substrate comprises a second substrate, a second electrode and a hydrophobic insulating layer in sequence along a direction toward the upper substrate, wherein an adjustment zone is formed between the upper substrate and the lower substrate, wherein the adjustment zone is filled with mutually immiscible polar liquid and non-polar liquid, and an end of the conductive pixel wall extends into the non-polar liquid.

[0009] The hydrophobic insulating layer may be a single layer, for example, formed of a material having hydrophobic insulating properties; or may be formed by arranging a hydrophobic layer on an insulating layer, for example, coating a hydrophobic material on the insulating layer.

[0010] According to the electrowetting display device structure of some embodiments of the present invention, the first substrate and the second substrate are flexible substrates.

[0011] According to some embodiments of the electrowetting display device structure of the present invention, a sealing frame is provided between the upper substrate and the lower substrate. In some embodiments, the sealing frame is a flexible sealing frame.

[0012] According to the electrowetting display device structure of some embodiments of the present invention, the material of the sealant frame is pressure-sensitive adhesive.

[0013] According to the electrowetting display device structure of some embodiments of the present invention, the first electrode and the second electrode are connected to a power supply component. The way of connecting the power supply components can be that the first electrode and the second electrode are independently connected to different power supply components, and the switching state of the first electrode is controlled by controlling the power supply component connected to the first electrode, thereby controlling the conductive pixel wall connected to the first electrode, and the switching state of the second electrode is controlled by controlling the power supply component connected to the second electrode, thereby controlling the wettability of the hydrophobic insulating layer, thereby realizing the switching of the pixel; it can also be achieved by separately controlling the first electrode and the second electrode in the circuit of the same power supply component, thereby realizing the driving of the device.

[0014] A second aspect of the present invention provides a packaging method for the above-mentioned electrowetting display device structure, comprising the following steps:

[0015] Taking the upper substrate, and filling the pixel grid with polar liquid;

[0016] Filling a non-polar liquid above the polar liquid, wherein the liquid level of the non-polar liquid is higher than the height of the conductive pixel wall;

[0017] Remove the substrate, set a sealing frame on the lower substrate, the sealing frame has an opening, and cover the lower substrate on the upper substrate;

[0018] Applying pressure to the lower substrate so that excess non-polar liquid flows out from the opening;

[0019] The opening is sealed.

[0020] According to the packaging method of the electrowetting display device structure of some embodiments of the present invention, the process of applying pressure to the lower substrate includes: first applying a first pressure to the central area of ​​the lower substrate, and then applying a second pressure to the surrounding area of ​​the lower substrate, wherein the first pressure is greater than the second pressure.

[0021] According to some embodiments of the present invention, the packaging method of the electrowetting display device structure further includes a step of volatilizing part of the polar liquid before the step of filling the non-polar liquid above the polar liquid.

[0022] According to the packaging method of the electrowetting display device structure of some embodiments of the present invention, the method of volatilizing part of the polar liquid is any one of heating, vacuum evaporation, and volatilization by adding a volatile solvent.

[0023] According to the packaging method of the electrowetting display device structure of some embodiments of the present invention, the volatile solvent includes at least one of ethylene glycol and methanol.

[0024] The beneficial effects of the embodiments of the present invention are:

[0025] The embodiment of the present invention provides an electrowetting display device structure, which eliminates the traditional way of constructing a pixel wall structure on a hydrophobic insulating layer, avoids the influence of high-temperature reflow on the substrate, and the hydrophobic insulating layer does not need to be subjected to surface modification and recovery treatment after film formation and curing, completely ensuring that the original characteristics of the surface of the hydrophobic insulating layer are not destroyed, maintaining the hydrophobic characteristics of the surface of the hydrophobic insulating layer, and keeping the hysteresis angle of the surface of the hydrophobic insulating layer to a minimum, which is beneficial to the opening and closing process of the electrowetting device pixel, and improves the reliability of the electrowetting optical device. At the same time, the non-polar solution is separated and contracted by the conductive pixel wall and the electrode, so as to solve the device failure risk caused by the pixel wall structure being constructed on the surface of the hydrophobic insulating layer and destroying its original characteristics. In addition, since the embodiment of the present invention sets the conductive pixel wall on the upper substrate, the surface structure of the hydrophobic insulating layer is not destroyed, and thus no impurities will remain on the surface of the hydrophobic insulating layer due to the development process of the conductive pixel wall, thereby reducing the device failure risk. In addition, in the electrowetting display device structure of the embodiment of the present invention, the conductive pixel wall is directly connected to the first electrode. By energizing the first electrode, the conductive pixel wall can freely cut the non-polar liquid. The conductive pixel wall also plays the role of a support column, replacing the pixel wall and support column structure in the traditional electrowetting device, avoiding the problem of the traditional electrowetting device requiring precise alignment of the pixel wall and the support column structure and the bending stability affected by the misalignment of the support column structure and the pixel wall. The present invention can achieve fitting packaging without precise alignment, can achieve self-support, improve the bending performance and yield of the device, and has certain advantages in flexibility. In addition, turning on the first electrode can separate the non-polar liquid, and the shrinkage of the non-polar liquid reduces a certain spreading area. Therefore, the threshold value of the applied voltage required by the second electrode of the lower substrate will be reduced accordingly, which reduces the threshold voltage to a certain extent and achieves a faster response of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of a traditional electrowetting device;

[0027] Figure 2 It is a schematic structural diagram of an electrowetting display device according to a first embodiment of the present invention;

[0028] Figure 3 It is a schematic diagram of the separation of non-polar liquid in the electrowetting display device structure when the first electrode of the upper substrate is in an open state;

[0029] Figure 4 It is a schematic diagram of the contraction of the non-polar liquid when the second electrode of the lower substrate in the electrowetting display device structure is in an open state;

[0030] Figure 5 Schematic diagram of the pixel opening process of the electrowetting display device structure;

[0031] Figure 6It is a schematic diagram of filling of polar liquid and non-polar liquid;

[0032] Figure 7 A schematic diagram of the setting of the sealant frame of the lower substrate;

[0033] Figure 8 Schematic diagram of packaging the upper substrate and the lower substrate. DETAILED DESCRIPTION

[0034] The following will be combined with the embodiments to clearly and completely describe the concept of the present invention and the technical effects produced, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0039] Reference Figure 2, shows the structure of the electrowetting display device of the first embodiment of the present invention, including an upper substrate 10 and a lower substrate 20. The upper substrate 10 includes a first substrate 11, a first electrode 12 and a conductive pixel wall 13 in the direction toward the lower substrate 20. In this embodiment, the first substrate 11 is a flexible substrate, and the flexible substrate can be exemplified by PEN (polyethylene terephthalate) or flexible glass. The first electrode 12 is an ITO electrode. The conductive pixel wall 13 surrounds a pixel grid. The conductive pixel wall 13 is made of conductive photoresist. The conductive pixel wall 13 is directly connected to the first electrode 12 as a pixel electrode. The lower substrate 20 includes a second substrate 21, a second electrode 22 and a hydrophobic insulating layer 23 in the direction toward the upper substrate 10. In this embodiment, the second substrate 21 is a flexible substrate, and the second electrode 22 is an ITO electrode. An adjustment area is formed between the upper substrate 10 and the lower substrate 20, and the adjustment area is filled with mutually immiscible polar liquid 30 and non-polar liquid 40. The end 14 of the conductive pixel wall 13 extends into the non-polar liquid 40, but does not contact the hydrophobic insulating layer 23 of the lower substrate 20, that is, there is a distance between the conductive pixel wall 13 and the hydrophobic insulating layer 23, and the distance is smaller than the average thickness of the non-polar liquid 40. A non-polar liquid area 41 is formed between the end 14 of the conductive pixel wall 13 and the hydrophobic insulating layer 23. In the energized state, the conductive pixel wall 13 (having a certain hydrophilicity) causes the thinner non-polar liquid area 41 below it to withstand a greater electric field strength due to the characteristics of an equipotential body, causing the non-polar liquid in the non-polar liquid area 41 to rupture and move preferentially, thereby achieving the effect of display pixel segmentation. Figure 3 , shows a schematic diagram of the separation of non-polar liquid in the electrowetting display device structure when the first electrode of the upper substrate is turned on. When the first electrode 12 is turned on (i.e., when powered on), the non-polar liquid in the thinner non-polar liquid area 41 below the conductive pixel wall 13 breaks and separates. At the same time, the conductive pixel wall 13 also supports the upper and lower substrates of the device to prevent the device from collapsing. In addition, the non-polar liquid 40 is separated in advance due to the electric field, which reduces the threshold voltage required for the non-polar liquid 40 to shrink, reduces the threshold voltage for pixel opening, and thus improves the device response speed. Figure 4 , shows a schematic diagram of the contraction of the non-polar liquid when the second electrode of the lower substrate in the electrowetting display device structure is in the open state. When the second electrode 22 is in the open state (i.e., when powered on), a certain voltage is applied to the second electrode 22. According to the electrowetting principle, the voltage causes a change in surface tension, and the non-polar liquid 40 is pushed forward, thereby realizing an optical switch.

[0040] The driving method of the above electrowetting display structure is: the first electrode 12 is connected to the conductive pixel wall 13, and the electric field of the conductive pixel wall 13 is directly affected by the first electrode 12, see Figure 5 , showing the pixel opening process of the electrowetting display structure. When no voltage is applied, the Figure 2 , the first electrode 12 and the second electrode 22 are in the pixel closed state, and the non-polar liquid 40 is in the spreading state. When a voltage is applied to the first electrode 12, the first electrode 12 is in the open state, and the Figure 3 , the wettability of the surface of the conductive pixel wall 13 changes, the electric field at the bottom of the conductive pixel wall 13 becomes stronger, and the polar liquid 30 gathers at the non-polar liquid area 41 at the bottom of the conductive pixel wall 13, thereby causing the non-polar liquid 40 to break. After the non-polar liquid 40 breaks and separates, a certain driving voltage is applied to the second electrode 22, combined with Figure 4 , the change in wettability of the hydrophobic insulating layer 23 of the lower substrate 20 causes a change in surface tension, causing the non-polar liquid 40 to shrink, thereby realizing an electrowetting optical switch. When the pixel opening process is completed, the voltage of the second electrode 22 is removed, the hydrophobicity of the hydrophobic insulating layer 23 is restored, the non-polar liquid 40 is spread again, and the pixel area is closed. Finally, the voltage of the first electrode 12 is removed, the wettability of the conductive pixel wall 13 is restored, the non-polar liquid 40 is spread again, and fills the non-polar liquid area 41, and the pixel is closed.

[0041] The embodiment of the present invention also provides a packaging method for the electrowetting display structure, comprising the following steps:

[0042] (1) Preparation of upper substrate 10: Prepare the first electrode 12 on the first substrate 11. The electrode film forming technology is widely used in industrial production and will not be described in detail here. A layer of photoresist material is coated on the surface of the first electrode 12 to prepare a conductive pixel wall 13. The coating method includes but is not limited to slit coating, spin coating, screen printing, flexible printing and other methods. After thermal curing, a mask is covered on the surface of the photoresist, exposed by ultraviolet light, and finally developed to obtain a conductive pixel wall 13, which surrounds a pixel grid.

[0043] The upper substrate 10 is turned upside down (the side with the conductive pixel wall 13 is facing upward), and the polar liquid 30 is filled in the pixel grid surrounded by the conductive pixel wall 13. In this embodiment, the polar liquid 30 is a polar electrolyte solution. The level of the filled polar liquid 30 is lower than the height of the conductive pixel wall 13 to facilitate the subsequent filling of the non-polar liquid 40.

[0044] (2) See Figure 6 , continue to fill the non-polar liquid 40 above the polar liquid 30, the level of the non-polar liquid 40 should be higher than the height of the conductive pixel wall 13, ensuring that the capacity of the non-polar liquid 40 is sufficient for the electrowetting display structure.

[0045] (3) Preparing the lower substrate 20: The second electrode 22 is prepared on the second substrate 21 by existing means, and the hydrophobic insulating layer 23 is coated on the surface of the second electrode 22 by a hydrophobic material solution by spin coating, dip coating, screen printing, flexible printing, etc., and finally cured in a high temperature environment.

[0046] After filling the non-polar liquid 40, the lower substrate 20 needs to be covered on the upper substrate 10 to complete the packaging process. During the packaging process, the problem that needs to be paid attention to is how to avoid residual bubbles in the electrowetting display structure. To solve this problem, the embodiment of the present invention proposes the following method:

[0047] See also Figure 7 A sealing frame 50 is provided on the hydrophobic insulating layer of the lower substrate 20. The sealing frame 50 may be made of a pressure-sensitive adhesive material. The sealing frame 50 has at least one opening 51. Figure 6 As shown, openings 51 are left at four different positions, the purpose of which is to allow excess non-polar liquid to flow out through the openings 51 during the packaging process;

[0048] See also Figure 8 , then cover the lower substrate 20 on top of the upper substrate 10, keep the upper substrate 10 and the lower substrate 20 horizontal, then apply pressure to the lower substrate 20, the excess non-polar liquid 40 flows out from the opening of the sealant frame 50, and then seal the opening with a packaging material such as ultraviolet acrylate, and finally press and dry to complete the packaging of the entire device.

[0049] In some embodiments, the process of applying pressure to the lower substrate 20 is as follows: first, a larger first pressure 61 is applied to the central area of ​​the lower substrate 20. Due to the uneven force, the central area of ​​the lower substrate 20 will first contact the non-polar liquid 40. Then, a smaller second pressure 62 is applied to the surrounding area of ​​the lower substrate 20. The lower substrate 20 is less deformed, and the contact area with the non-polar liquid 40 is increased. The excess non-polar liquid 40 flows out through the opening of the sealing frame 50. After the lower substrate 20 is completely in contact with the non-polar liquid 40, the opening is sealed with ultraviolet acrylate, etc., and finally pressed and dried to complete the packaging of the entire device.

[0050] In some embodiments, in step (1), the level of the filled polar liquid 30 is lower than the height of the conductive pixel wall 13 by volatilizing part of the polar liquid. The method of volatilizing part of the polar liquid includes but is not limited to heating, vacuum evaporation, and volatilization by adding a volatile solvent. Since the volatilization process is carried out simultaneously on the entire liquid surface, the entire liquid surface is still horizontal when part of the polar liquid is volatilized. The method of adding a volatile solvent for volatilization, for example, can be achieved by adding part of an organic solvent such as ethylene glycol or methanol that is more volatile than the polar electrolyte solution to the polar electrolyte solution, and volatilizing the organic component when the polar electrolyte solution does not volatilize violently. This method can accurately control the amount of liquid level drop by controlling the content of the added volatile solvent. After the volatilization process is completed, no organic component will remain in the polar electrolyte solution.

Claims

1. An electrowetting display device structure, characterized in that: The invention comprises an upper substrate and a lower substrate which are arranged opposite to each other, wherein the upper substrate comprises a first substrate, a first electrode and a conductive pixel wall in sequence along a direction toward the lower substrate, wherein the conductive pixel wall forms a pixel grid, and the lower substrate comprises a second substrate, a second electrode and a hydrophobic insulating layer in sequence along a direction toward the upper substrate, wherein an adjustment area is formed between the upper substrate and the lower substrate, wherein the adjustment area is filled with mutually immiscible polar liquid and non-polar liquid, and an end of the conductive pixel wall extends into the non-polar liquid; There is a distance between the conductive pixel wall and the hydrophobic insulating layer, and the distance is smaller than the average thickness of the non-polar liquid, and a non-polar liquid region is formed between the end of the conductive pixel wall and the hydrophobic insulating layer; The first electrode and the second electrode are connected to a power supply component, and the power supply component is connected in such a way that the first electrode and the second electrode are independently connected to different power supply components, respectively. The driving method specifically configured to control the structure of the electrowetting display device includes: firstly applying a voltage to the first electrode through the power supply component connected to the first electrode, the first electrode is in an open state, the wettability of the surface of the conductive pixel wall changes, the electric field at the bottom of the conductive pixel wall becomes stronger, and the polar liquid gathers to the non-polar liquid area at the bottom of the conductive pixel wall, so that the non-polar liquid in the non-polar liquid area is preferentially broken and separated; after the non-polar liquid is broken and separated, applying a driving voltage to the second electrode through the power supply component connected to the second electrode, the wettability of the hydrophobic insulating layer changes, resulting in a change in surface tension, causing the non-polar liquid to shrink, thereby realizing the opening of the pixel.

2. The electrowetting display device structure according to claim 1, characterized in that: The first substrate and the second substrate are flexible substrates.

3. The electrowetting display device structure according to claim 1, characterized in that: A sealing frame is arranged between the upper substrate and the lower substrate.

4. The electrowetting display device structure according to claim 3, characterized in that: The material of the sealant frame is pressure-sensitive adhesive.

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