Electrowetting display panel, display device and electronic equipment

Abstract

The invention discloses an electrowetting display panel, a display device and electronic equipment, and belongs to the technical field of display, and the electrowetting display panel comprises a pixel wall which defines a pixel space and is internally provided with a containing cavity communicated with the pixel space; the colored fluid is contained in the pixel space and is configured to enter the containing cavity from the pixel space under the action of external force, so that the shielding degree of the colored fluid to the effective reflection area of the reflection layer is reduced, and the possibility of local dark spots or uneven brightness in a display picture is reduced; therefore, the brightness potential of reflection display can be fully utilized, and the overall display effect is more uniform and stable.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to an electrowetting display panel, display device, and electronic device. Background Technology

[0002] Electronic paper technology, as a reflective display technology, typically utilizes ambient light for imaging. It features low power consumption, high visibility, and suitability for flexibility, and has been applied in reading terminals, information displays, and other fields. Among these technologies, electrowetting electronic paper technology is based on the principle of electric field-controlled interfacial tension of liquids. By altering the contact angle of charged ink on the surface of a hydrophobic insulating layer, the charged ink contracts or spreads within the pixel area, thereby creating different color states on the reflective layer and achieving image display.

[0003] In related technologies, charged ink typically shrinks towards the edge of the pixel area when displayed in a bright state. However, the shrunken charged ink still remains in the display area and occupies a certain area, which blocks the effective reflective area of ​​the reflective layer. This can easily cause local dark spots or uneven brightness in the displayed image, which is not conducive to fully utilizing the brightness advantage of reflective display and thus affects the overall display effect. Summary of the Invention

[0004] This application provides an electrowetting display panel, display device, and electronic device that can reduce the amount of ink that occupies the display area after shrinkage, thereby at least partially solving the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, an electrowetting display panel is provided, comprising: A pixel wall encloses a pixel space, and the pixel wall contains a receiving cavity communicating with the pixel space; and A colored fluid, contained within the pixel space, is configured to enter the containment cavity from the pixel space under the influence of an electric field.

[0006] In some embodiments, the volume of the receiving cavity is greater than or equal to the volume occupied by the colored fluid in the contracted state.

[0007] In some embodiments, the colored fluid is configured to flow entirely from the pixel space into the receiving cavity under the influence of an electric field.

[0008] In some embodiments, the receiving cavity is eccentrically disposed in the thickness direction of the pixel wall and disposed close to the pixel space.

[0009] In some embodiments, the thickness of the pixel wall is not less than 30% of the length of the pixel space in the thickness direction of the pixel wall.

[0010] In some embodiments, the pixel space also contains a transparent fluid that is immiscible with the colored fluid, wherein the colored fluid is a non-polar fluid and the transparent fluid is a polar fluid, and the transparent fluid is configured to squeeze the colored fluid into the receiving cavity under the action of an electric field.

[0011] In some embodiments, the colored fluid occupies 10% to 30% of the pixel space volume.

[0012] In some embodiments, the electrowetting display panel further includes: First substrate; and The second substrate is disposed opposite to the first substrate; The pixel wall is disposed between the first substrate and the second substrate, and the pixel wall, together with the first substrate and the second substrate, forms a plurality of pixel spaces. The pixel wall is provided with a receiving cavity for each pixel space, and each receiving cavity is connected to the corresponding pixel space.

[0013] In some embodiments, the first substrate is a packaging substrate, and the thickness of the pixel wall on the side of the first substrate is greater than the thickness of the pixel wall on the side of the second substrate.

[0014] According to a second aspect of this application, a display device is provided, comprising the electrowetting display panel described above.

[0015] According to a third aspect of this application, an electronic device is also provided, comprising the electrowetting display panel described in the above technical solution, or comprising the electrowetting display panel described in the above technical solution.

[0016] In the electrowetting display panel of this application embodiment, by providing a receiving cavity communicating with the pixel space within the pixel wall, the colored fluid can be at least partially transferred from the pixel space to the receiving cavity under the action of an electric field, thereby reducing the residual occupation of the colored fluid in the pixel space after bright-state contraction. This helps to reduce the degree of shading of the effective reflective area of ​​the reflective layer by the colored fluid, reducing the possibility of local dark spots or uneven brightness in the displayed image, and thus facilitating the full utilization of the brightness potential of the reflective display, resulting in a more uniform and stable overall display effect.

[0017] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0020] Figure 1 This is a schematic diagram of the structure of the colored ink of the electrowetting display panel provided in the exemplary embodiment of this disclosure in the unfolded state; Figure 2 This is a schematic diagram of the structure of the colored ink of the electrowetting display panel provided in the exemplary embodiment of this disclosure in a contracted state; Figure 3 This is another structural schematic diagram of the electrowetting display panel provided in an exemplary embodiment of this disclosure.

[0021] Explanation of reference numerals in the attached figures: 100, Pixel wall; 110, Receiving cavity; 120, Connecting port; 130, First sidewall; 140, Second sidewall; 150, First reflective layer; 200, Pixel space; 300, Colored fluid; 400, Electrode; 500, Transparent fluid; 600, First substrate; 610, Second reflective layer; 620, First insulating hydrophobic layer; 700, Second substrate; 710, Second insulating hydrophobic layer. Detailed Implementation

[0022] 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 them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0023] According to the first aspect of this application, referring to Figures 1 to 3 This disclosure provides an electrowetting display panel, which is, by way of example, a reflective display panel that mainly uses ambient light for imaging display during operation, thus being suitable for achieving good visibility under natural light or strong light conditions.

[0024] The electrowetting display panel includes a pixel wall 100 and a colored fluid 300. The pixel wall 100 is used to enclose and form a pixel space 200 to limit the activity area of ​​the colored fluid 300. The colored fluid 300 can switch between a contracted state and an expanded state under the action of external force, thereby cooperating with the reflective structure to achieve different display states.

[0025] For example, the colored fluid 300 can be a polar fluid or a non-polar fluid. When the colored fluid 300 is a polar fluid, it can directly switch states or change positions under the action of an electric field, for example, changing from an expanded state to a contracted state. When the colored fluid 300 is a non-polar fluid, a polar fluid that is immiscible with the colored fluid 300 can be filled in the pixel space 200. Under the action of an electric field, the polar fluid is driven to move, and the interaction between the fluids compresses the colored fluid 300, causing the colored fluid 300 to be in an expanded or contracted state accordingly.

[0026] In some embodiments, refer to Figure 1 and Figure 2 The pixel wall 100 encloses the pixel space 200, and the pixel wall 100 has a receiving cavity 110 that communicates with the pixel space 200. The receiving cavity 110 can be understood as a cavity structure formed inside the pixel wall 100, which is connected to the pixel space 200 through the connecting port 120, so that fluid exchange can occur between the pixel space 200 and the receiving cavity 110.

[0027] It should be noted that the specific structural form of the receiving cavity 110 is not limited to a single form. It can be a cavity extending along the thickness direction of the pixel wall 100, or a local concave cavity formed inside the pixel wall 100. Correspondingly, the connecting port 120 can be a through hole, a through slot, or other structural form that enables communication between the pixel space 200 and the receiving cavity 110. Those skilled in the art can reasonably design the number, position, and volume of the receiving cavities 110 according to the pixel size, ink usage, or driving conditions to achieve a similar fluid containing effect without departing from the technical concept of this application.

[0028] For example, the receiving cavity 110 can be centrally located in the thickness direction of the pixel wall 100, or it can be eccentrically located relative to the pixel wall 100 in the thickness direction, so that the receiving cavity 110 is arranged relatively closer to the pixel space 200. With the above arrangement, it is beneficial to guide the colored fluid 300 to migrate towards the receiving cavity 110 under the action of the electric field, thereby reducing the residual occupation of the colored fluid 300 in the pixel space 200.

[0029] In some embodiments, refer to Figure 1 and Figure 2Multiple pixel walls 100 can be configured, spaced apart in the thickness direction, with adjacent pixel walls 100 defining a pixel space 200. All pixel walls 100 communicate with their corresponding pixel spaces 200 on the same side to form a consistent fluid migration direction. For example, as... Figure 2 As shown, the right side wall of each pixel wall 100 is connected to the corresponding pixel space 200, so that the colored fluid 300 in the pixel space 200 can migrate in a uniform direction to the internal structure of the pixel wall 100 under the action of the electric field.

[0030] By placing the connected sides of multiple pixel walls 100 on the same side, it is beneficial to form a more consistent fluid motion path in the pixel array, reduce the fluid response differences between different pixel units, and thus facilitate the coordinated control of the state changes of the colored fluid 300. At the same time, this structural arrangement also simplifies the processing and arrangement of the pixel walls 100, making it suitable for large-scale fabrication and array applications.

[0031] In some embodiments, refer to Figure 1 and Figure 2 The colored fluid 300 is contained within the pixel space 200 and is configured to enter the receiving cavity 110 from the pixel space 200 under the action of an external force. For example, the colored fluid 300 can enter the receiving cavity 110 from the pixel space 200 under the action of an electric field. When a driving electric field is applied within the pixel space 200, the electric field force and interfacial tension act together on the colored fluid 300, causing the colored fluid 300 to move along the communication side between the pixel wall 100 and the pixel space 200, and gradually enter the receiving cavity 110 that communicates with the pixel space 200.

[0032] By setting a receiving cavity 110 within the pixel wall 100 and communicating it with the pixel space 200, it is beneficial to provide additional storage space for the colored fluid 300, thereby reducing its spreading area within the pixel space 200 when the colored fluid 300 migrates to the receiving cavity 110, thus facilitating the switching of pixel display states.

[0033] For example, the colored fluid 300 may partially or completely enter the receiving cavity 110 under the action of an external force (such as an electric field).

[0034] In some embodiments, the volume of the receiving cavity 110 is greater than or equal to the volume occupied by the colored fluid 300 in its contracted state. This arrangement is beneficial because, under the influence of an electric field, the colored fluid 300 can completely or substantially enter the receiving cavity 110, thereby reducing its residual area within the pixel space 200. The additional space provided by the receiving cavity 110 reduces the occlusion of the colored fluid 300 on the reflective areas within the pixel space 200, which is beneficial for improving the uniformity and overall brightness of the bright display.

[0035] In some embodiments, refer to Figure 2 The colored fluid 300 is configured to enter the receiving cavity 110 entirely from the pixel space 200 under the action of an electric field. With this configuration, the residual occupancy of the colored fluid 300 in the pixel space 200 during bright display can be significantly reduced, thereby reducing the occupancy of the reflective area in the pixel space 200 and improving the brightness uniformity and overall display effect of the reflective display.

[0036] For example, in order to achieve the complete migration of the colored fluid 300 into the receiving cavity 110, the volume of the receiving cavity 110, the size and position of the connecting port 120 can be adjusted, or the appropriate viscosity and interfacial wetting characteristics of the colored fluid 300 can be selected, so that the fluid can smoothly enter the receiving cavity 110 under the action of the electric field, while still maintaining a reversible state to support display switching.

[0037] In some embodiments, refer to Figure 1 and Figure 2 The receiving cavity 110 is offset from the pixel wall 100 in the thickness direction and is located close to the pixel space 200. Offset means that the receiving cavity 110 is shifted towards the pixel space 200 in the thickness direction relative to the overall centerline of the pixel wall 100, thus bringing the connected area between the receiving cavity 110 and the pixel space 200 closer to the location of the colored fluid 300. This structural design facilitates the migration of the colored fluid 300 towards the receiving cavity 110 under the influence of an electric field, reducing the area occupied by the colored fluid 300 in the pixel space 200 during bright-state contraction. This reduces the obstruction of the effective reflective area of ​​the reflective layer and improves the brightness uniformity of the displayed image.

[0038] In some embodiments, refer to Figure 1 and Figure 2 The receiving cavity 110 is connected to the pixel space 200 via a connecting port 120, which is located on the side wall of the pixel wall 100. For example, the connecting port 120 is located on the side wall of the receiving cavity 110 closest to the pixel space 200. The pixel wall 100 needs to provide structural support in the display panel, and the presence of the receiving cavity 110 and the connecting port 120 will locally weaken the mechanical strength of the pixel wall 100, especially in the side wall area where the connecting port 120 is located.

[0039] To improve this situation, the receiving cavity 110 can be offset towards the side wall where the connecting opening 120 is located in the thickness direction of the pixel wall 100, making that side wall relatively thin, while distributing more material to the other side wall without an opening, thereby forming a thicker support structure. This structural design helps to maintain the overall mechanical strength and stability of the pixel wall 100 while providing fluid communication between the pixel space 200 and the receiving cavity 110, ensuring that the display panel can maintain the required structural support capacity during assembly, handling, and use.

[0040] For example, the degree of eccentricity and the sidewall thickness can be optimized according to the pixel size, the volume of the cavity 110 or the mechanical properties of the material, while the size and shape of the connecting port 120 can also be selected as a slit, hole or groove structure to take into account both fluid migration efficiency and structural strength requirements.

[0041] In some embodiments, refer to Figure 1 and Figure 2 The pixel wall 100 has a first sidewall 130 and a second sidewall 140 disposed opposite to each other. A connecting port 120 is formed in the first sidewall 130. In the thickness direction of the pixel wall 100, the receiving cavity 110 is eccentrically disposed relative to the pixel wall 100 and close to the first sidewall 130. Through the above structural design, the colored fluid 300 can more easily migrate from the pixel space 200 to the receiving cavity 110 along the direction of the connecting port 120 under the action of an electric field, reducing the residual occupied area in the pixel space 200, thereby reducing the obstruction of the effective reflection area of ​​the reflective layer and improving the brightness uniformity of the bright state display. The first sidewall 130 is relatively thin due to the connecting port 120. To compensate for the overall mechanical strength of the pixel wall 100, the second sidewall 140 can be designed to be thicker, thereby forming a stable support structure.

[0042] In some embodiments, refer to Figure 1 and Figure 2 A first reflective layer 150 is provided on the surface of the pixel wall 100 facing the pixel space 200. By forming a reflective layer on this surface, when the colored fluid 300 migrates towards the receiving cavity 110 under the action of an electric field and contracts within the pixel space 200, the first reflective layer 150 can reflect the ambient light entering the pixel space 200, thereby increasing the effective reflective area of ​​the pixel space 200, which is beneficial to improving the brightness level and display uniformity of the bright state display. For example, the first reflective layer 150 can be a metal reflective film, a white high-reflective coating, or a multilayer thin film structure with reflective function. The specific material form can be selected according to the display requirements, and this application does not limit it in this regard.

[0043] In some embodiments, refer to Figure 1 and Figure 2 At least two adjacent pixel spaces 200 form a pixel unit, and the colored fluid 300 in adjacent pixel spaces 200 within the same pixel unit has a different color. With this configuration, each pixel space 200 can independently control the contraction or expansion state of the colored fluid 300 under the influence of an electric field, thereby achieving multi-color combination display at the pixel unit level, which is beneficial for improving the color performance of the displayed image. For example, the colored fluid 300 in different pixel spaces 200 can respectively display colors such as red, green, blue, or black to adapt to different types of electrowetting display requirements.

[0044] In some embodiments, a pixel unit includes four pixel spaces 200. Exemplarily, the four pixel spaces 200 can be arranged in an array in a plane, and each pixel space 200 contains a colored fluid 300 of a different color. By applying an electric field to each pixel space 200 and controlling it independently, a combination display of multiple colors or grayscale levels can be realized in the pixel unit, thereby improving the display resolution and color reproduction capability.

[0045] In some embodiments, the colored fluid 300 is a coloring ink. Exemplarily, the coloring ink can be a liquid material containing pigments or dyes, capable of changing position between the pixel space 200 and the receiving cavity 110 under the influence of an electric field, thereby switching the display state. Using a coloring ink as the colored fluid 300 is advantageous for achieving higher color contrast and display clarity. Its specific composition and color type can be selected according to actual display requirements, and this application does not limit this.

[0046] In some embodiments, the thickness of the pixel wall 100 is not less than 30% of the length of the pixel space 200 in the thickness direction of the pixel wall 100. Here, "thickness direction of the pixel wall 100" can be understood as the direction of the pixel wall 100 perpendicular to its extension direction and used to separate adjacent pixel spaces 200; "length of the pixel space 200 in the thickness direction of the pixel wall 100" refers to the size of the pixel space 200 in the aforementioned direction.

[0047] By setting the thickness of the pixel wall 100 to be no less than 30% of the corresponding size of the pixel space 200, the pixel wall 100 can provide relatively sufficient structural dimensions in this direction, which is beneficial to improving the mechanical stability and support capacity of the pixel wall 100 itself. Especially when the pixel wall 100 is provided with a receiving cavity 110 and a connecting port 120, this structural configuration helps to mitigate the trend of strength weakening caused by local openings or openings, thereby helping to maintain the structural reliability of the pixel wall 100 during long-term use.

[0048] Meanwhile, the greater thickness of the pixel wall 100 can provide a larger design margin for the arrangement of the cavity 110, making it easier to rationally design the shape, position or volume of the cavity 110 inside the pixel wall 100. This is conducive to guiding the colored fluid 300 to migrate towards the cavity 110 under the action of the electric field, thereby helping to achieve effective contraction of the colored fluid 300 from the pixel space 200.

[0049] For example, the thickness of the pixel wall 100 can be 30% to 60%, 30% to 80%, or a greater proportion of the length of the pixel space 200 in that direction; the receiving cavity 110 can be configured as a groove-shaped structure continuously distributed along the extension direction of the pixel wall 100, or as a plurality of cavity structures arranged at intervals. The above-mentioned different thickness proportions and the forms of the receiving cavity 110 are all equivalent variations of the technical solution described in this application, and all are beneficial to effectively accommodating and guiding the contraction behavior of the colored fluid 300 while ensuring the structural strength of the pixel wall 100.

[0050] It should be understood that, under the condition that other structural conditions are basically the same, when the size of the pixel wall 100 in the thickness direction is relatively small, the occlusion area of ​​the pixel wall 100 in the pixel space 200 is reduced accordingly, which is conducive to increasing the effective display area of ​​the pixel space 200, and thus conducive to improving the overall display effect of the display panel.

[0051] In some embodiments, refer to Figure 1 and Figure 2 The pixel space 200 also contains a transparent fluid 500 that is immiscible with the colored fluid 300. The colored fluid 300 is a non-polar fluid, while the transparent fluid 500 is a polar fluid. The transparent fluid 500 is configured to squeeze the colored fluid 300 into the receiving cavity 110 under the action of an electric field. By introducing these two immiscible fluids into the pixel space 200, when an electric field is applied, the polar fluid is displaced under the action of the electric field force and exerts a squeezing effect on the non-polar colored fluid 300 within the pixel space 200, thereby guiding the colored fluid 300 to migrate towards and enter the receiving cavity 110. Based on this structure and working method, it is beneficial to achieve the switching between the expanded and contracted states of the colored fluid 300 without directly driving the colored fluid 300, and at the same time, it is beneficial to improve the stability of the colored fluid 300's aggregation into the receiving cavity 110, thereby providing a more controllable fluid behavior basis for subsequent display state control.

[0052] In some embodiments, the colored fluid 300 occupies 10% to 30% of the volume of the pixel space 200. Within this volume ratio range, the colored fluid 300 can spread relatively evenly within the pixel space 200 in the unfolded state, which is beneficial for forming continuous coverage of the pixel space 200 and reducing the situation of insufficient local coverage; at the same time, when switching to the contracted state, the overall volume of the colored fluid 300 is also suitable for gathering into the receiving cavity 110 under the action of the electric field, which is beneficial for achieving a balance between coverage requirements and contraction requirements, thereby providing support for stable switching of display states.

[0053] For example, the colored fluid 300 occupies 10%, 10.6%, 12.1%, 13.8%, 14.5%, 15.9%, 16.7%, 17.2%, 18.4%, 19.1%, 19.8%, 20.3%, 20.9%, 21.5%, 22.2%, 22.8%, 23.4%, 24.1%, 24.7%, 25.3%, 26.2%, 26.9%, 27.4%, 28.1%, 28.5%, 28.9%, 29.2%, 29.5%, 29.8% or 30% of the volume of the pixel space 200. This application embodiment does not specifically limit this.

[0054] In some embodiments, refer to Figure 1 and Figure 2 The electrowetting display panel also includes a first substrate 600 and a second substrate 700. The second substrate 700 is disposed opposite to the first substrate 600, forming an interlayer space between them for accommodating the display functional structure. Pixel walls 100 are disposed between the first substrate 600 and the second substrate 700 and distributed along the planar direction. The pixel walls 100, the first substrate 600, and the second substrate 700 enclose a plurality of pixel spaces 200. Each pixel space 200 is used to define the activity area of ​​the colored fluid 300. The pixel walls 100 are provided with a receiving cavity 110 corresponding to each pixel space 200, and each receiving cavity 110 is connected to the corresponding pixel space 200.

[0055] For example, the pixel wall 100 can be formed on the surface of the first substrate 600 by photolithography, molding, or coating and curing, and extends towards the second substrate 700, with its height corresponding to the distance between the first substrate 600 and the second substrate 700. In this structure, the pixel wall 100 serves to separate pixels in the plane and supports the first substrate 600 and the second substrate 700 in the thickness direction, which helps to maintain the geometric stability of the pixel space 200.

[0056] Based on this structure, the pixel wall 100 is provided with a receiving cavity 110 for each pixel space 200, and each receiving cavity 110 is fluidly connected to the corresponding pixel space 200. By configuring a receiving cavity 110 for each pixel space 200, the colored fluid 300 in each pixel space 200 can migrate to the corresponding receiving cavity 110 under the action of an electric field, which is beneficial to realize independent driving and display control at the pixel level, thereby avoiding mutual interference between fluids in different pixels.

[0057] It should be noted that "corresponding setup" can be understood as each pixel space 200 establishing a connection with at least one receiving cavity 110, and this connection spatially matching the pixel space 200. For example, the receiving cavity 110 can be located entirely inside its corresponding pixel wall 100, or it can be formed in a local area of ​​the pixel wall 100. As long as fluid communication with the corresponding pixel space 200 can be achieved structurally, the purpose of guiding the migration of the colored fluid 300 can be achieved.

[0058] Through the above structural configuration, the pixel wall 100 not only defines the pixel space 200, but also integrates a receiving cavity 110 structure for accommodating the colored fluid 300. This allows more of the colored fluid 300 to transfer into the pixel wall 100 during its contracted state, reducing the obstruction of the colored fluid 300 to the reflective area of ​​the pixel space 200 and thus providing a structural basis for improving the reflective display effect. Simultaneously, this structure, with the pixel wall 100 as a carrier to integrate the receiving cavity 110, facilitates the optimization of display performance without significantly increasing the thickness of the display panel, making it suitable for application in high-resolution electrowetting display panels.

[0059] In some embodiments, refer to Figure 2 and Figure 3 The first substrate 600 is a packaging substrate, and the thickness of the pixel wall 100 on the side of the first substrate 600 is greater than the thickness of the pixel wall 100 on the side of the second substrate 700. The second substrate 700 corresponds to the display side. The asymmetric thickness structure of the pixel wall 100 makes the pixel wall 100 have a smaller occlusion size on the side closer to the display side.

[0060] By reducing the thickness of the pixel wall 100 on the display side, the effective opening size of the pixel space 200 in the display side direction is correspondingly increased, which helps to increase the effective pixel area available for display per unit area, thereby helping to improve the pixel density and display resolution of the display panel.

[0061] Meanwhile, the pixel wall 100 maintains a relatively large thickness on the side closest to the packaging substrate, which helps compensate for the strength changes caused by structural thinning. This allows the pixel wall 100 to maintain good structural stability while serving to separate the pixel spaces 200 and support the substrate. Through this thickness distribution method, a reasonable balance is achieved between display effect and structural reliability, making it suitable for use in electrowetting display panel structures that require both resolution and reliability.

[0062] In some embodiments, electrodes 400 are provided on the first substrate 600 and / or the second substrate 700, and a motor is used to apply an electric field to the colored fluid 300. By providing electrodes 400 on the first substrate 600 and / or the second substrate 700, single-sided driving or double-sided driving can be selected according to display driving requirements, thereby guiding the colored fluid 300 to migrate or change shape between the pixel space 200 and the receiving cavity 110 under the action of the electric field. This facilitates fine control of the state of the colored fluid 300, thereby supporting stable switching between different display states.

[0063] In some embodiments, refer to Figure 1 and Figure 2 The first substrate 600 is a packaging substrate, and the connection port 120 is disposed close to the first substrate 600. Since the colored fluid 300 is more likely to form a convergence path on the side close to the packaging substrate when it migrates along the thickness direction under the action of an electric field, the above-mentioned arrangement of the connection port 120 helps to shorten the migration path of the colored fluid 300 from the pixel space 200 into the receiving cavity 110, thereby making it easier for the colored fluid 300 to enter the receiving cavity 110 under the action of an electric field, which helps to improve the stability and consistency of the fluid transfer process.

[0064] In some embodiments, refer to Figure 1 and Figure 2 An electrode 400, a second reflective layer 610, and a first insulating hydrophobic layer 620 are sequentially disposed on the side of the first substrate 600 facing the second substrate 700. The first insulating hydrophobic layer 620 is located on the side of the second reflective layer 610 facing the second substrate 700. In the above-described stacked structure, the electrode 400 is used to apply an electric field to the colored fluid 300 within the pixel space 200, the second reflective layer 610 is used to reflect incident ambient light to form a visible display effect, and the first insulating hydrophobic layer 620 is disposed between the reflective layer and the fluid to provide a hydrophobic interface condition while achieving electrical insulation, which is beneficial for controlling the wetting state and migration behavior of the colored fluid 300 under the action of the electric field. By coordinating the reflective layer and the insulating hydrophobic layer on the side of the first substrate 600, it is beneficial to fully utilize the reflective display structure and improve the effective reflection efficiency of the display area while ensuring the stability of electrowetting drive.

[0065] In some embodiments, a second insulating hydrophobic layer 710 is provided on the side of the second substrate 700 facing the first substrate 600. This second insulating hydrophobic layer 710 provides another hydrophobic interface condition for the fluid within the pixel space 200 and also acts as an electrical insulator, which helps stabilize the interface morphology of the colored fluid 300 and the transparent fluid 500 within the pixel space 200 under the influence of an electric field. Simultaneously, providing insulating hydrophobic layers on both the first substrate 600 side and the second substrate 700 side helps form a more uniform interface constraint condition in the thickness direction, thereby supporting the controllable migration of the colored fluid 300 between the pixel space 200 and the receiving cavity 110, and improving the consistency and reliability of display state switching.

[0066] According to a second aspect of this disclosure, a display device is provided, including the electrowetting display panel of the above embodiments. This display device possesses all the beneficial effects of the electrowetting display panel described above, which will not be repeated here.

[0067] According to a third aspect of this disclosure, an electronic device is provided, including the electrowetting display panel of the above embodiments, or including the display device of the above embodiments. This electronic device has all the beneficial effects of the above-described electrowetting display panel or display device, which will not be elaborated further herein.

[0068] In the description of this application, the terms "first" and "second" are used 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" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0069] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0070] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0071] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An electrowetting display panel, characterized in that, include: A pixel wall (100) encloses a pixel space (200), and the pixel wall (100) has a receiving cavity (110) communicating with the pixel space (200); and A colored fluid (300) is contained within the pixel space (200) and is configured to enter the receiving cavity (110) from the pixel space (200) under the action of an external force.

2. The electrowetting display panel according to claim 1, characterized in that, The volume of the receiving cavity (110) is greater than or equal to the volume occupied by the colored fluid (300) in the contracted state; And / or, the colored fluid (300) is configured to enter the receiving cavity (110) entirely from the pixel space (200) under the action of an electric field.

3. The electrowetting display panel according to claim 1, characterized in that, The receiving cavity (110) is eccentrically disposed in the thickness direction of the pixel wall (100) and is disposed close to the pixel space (200).

4. The electrowetting display panel according to claim 1, characterized in that, The thickness of the pixel wall (100) is not less than 30% of the length of the pixel space (200) in the thickness direction of the pixel wall (100).

5. The electrowetting display panel according to claim 1, characterized in that, The pixel space (200) also contains a transparent fluid (500) that is immiscible with the colored fluid (300). The colored fluid (300) is a non-polar fluid, and the transparent fluid (500) is a polar fluid. The transparent fluid (500) is configured to squeeze the colored fluid (300) into the receiving cavity (110) under the action of an electric field.

6. The electrowetting display panel according to claim 5, characterized in that, The colored fluid (300) occupies 10% to 30% of the volume of the pixel space (200).

7. The electrowetting display panel according to any one of claims 1 to 6, characterized in that, The electrowetting display panel also includes: First substrate (600); and The second substrate (700) is disposed opposite to the first substrate (600); The pixel wall (100) is disposed between the first substrate (600) and the second substrate (700). The pixel wall (100), together with the first substrate (600) and the second substrate (700), forms a plurality of pixel spaces (200). The pixel wall (100) is provided with a receiving cavity (110) for each pixel space (200). Each receiving cavity (110) is connected to the corresponding pixel space (200).

8. The electrowetting display panel according to claim 7, characterized in that, The first substrate (600) is a packaging substrate, and the thickness of the pixel wall (100) on the side of the first substrate (600) is greater than the thickness of the pixel wall (100) on the side of the second substrate (700).

9. A display device, characterized in that, Includes the electrowetting display panel as described in any one of claims 1 to 8.

10. An electronic device, characterized in that, It includes the electrowetting display panel as described in any one of claims 1 to 8, or the display device as described in claim 9.

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