Preparation method of electrowetting display screen, electrowetting display screen and display equipment

Abstract

The invention relates to the technical field of electrowetting display, and discloses a preparation method of an electrowetting display screen, the electrowetting display screen and display device.The preparation method of the electrowetting display screen comprises the steps that a first cover plate assembly is prepared, and the step of preparing the first cover plate assembly comprises the substeps that a first substrate is provided and comprises a first glass substrate and a first conductive layer which are stacked; forming a plurality of pixel walls on the first conductive layer, enabling the plurality of pixel walls to define a plurality of pixel spaces, and enabling any two adjacent pixel walls to be arranged at intervals so as to enable the plurality of pixel spaces to be communicated with each other; a sealing frame is attached to the first conductive layer, so that the plurality of pixel walls are arranged in a frame body of the sealing frame in a surrounding mode through the sealing frame; filling polar liquid and non-polar liquid in the plurality of pixel spaces by adopting a one-drop filling process, wherein the polar liquid and the non-polar liquid can flow among the plurality of pixel spaces through gaps between the adjacent pixel walls; and the second cover plate assembly covers the sealing frame, so that the filling process of the polar liquid and the non-polar liquid can be simplified.

Description

Technical Field

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

[0002] Electrowetting display devices are mainly based on the electrowetting effect. By applying an external voltage, the filling liquid is deformed and displaced, thereby achieving the spreading and contraction of ink in the device.

[0003] In the related art, an electrowetting display device is usually provided with a plurality of pixel spaces that are not connected to each other. When filling the pixel spaces with liquids such as ink, each pixel space needs to be filled individually, which is a relatively complicated process. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a method for preparing an electrowetting display screen, which can simplify the filling process of liquids such as ink.

[0005] The present invention also provides an electrowetting display screen manufactured by the above-mentioned method for manufacturing the electrowetting display screen and a display device including the electrowetting display screen.

[0006] According to the first aspect of the present invention, a method for preparing an electrowetting display screen includes: preparing a first cover plate assembly, and the preparation of the first cover plate assembly includes: providing a first substrate, the first substrate including a stacked first glass substrate and a first conductive layer; forming a plurality of pixel walls on the first conductive layer, so that the plurality of pixel walls enclose a plurality of pixel spaces, and any two adjacent pixel walls are spaced apart so that the plurality of pixel spaces are interconnected; attaching a sealing frame to the first conductive layer, so that the sealing frame encloses the plurality of pixel walls within the frame of the sealing frame; using a one-drop filling process to fill the plurality of pixel spaces with polar liquid and non-polar liquid, and the polar liquid and non-polar liquid can flow between the plurality of pixel spaces through the gaps between adjacent pixel walls; and covering the second cover plate assembly on the sealing frame.

[0007] The method for preparing an electrowetting display screen according to an embodiment of the present invention has at least the following beneficial effects: the method for preparing an electrowetting display screen comprises: preparing a first cover plate assembly, the preparation of the first cover plate assembly comprising: providing a first substrate, the first substrate comprising a stacked first glass substrate and a first conductive layer; forming a plurality of pixel walls on the first conductive layer, so that the plurality of pixel walls enclose a plurality of pixel spaces, and any two adjacent pixel walls are spaced apart so that the plurality of pixel spaces are interconnected; attaching a sealing frame to the first conductive layer, so that the sealing frame encloses the plurality of pixel walls within the frame of the sealing frame; and using a one-drop filling process to fill the plurality of pixel spaces. Polar liquid and non-polar liquid are filled inside, and the polar liquid and non-polar liquid can flow between multiple pixel spaces through the gaps between adjacent pixel walls; the second cover assembly is covered on the sealing frame, so that by setting the adjacent pixel walls to be spaced apart, a flow channel can be formed between any adjacent pixel spaces, so that the filling liquid can flow in each pixel space through the flow channel, and then a one-drop filling process can be used to fill the liquid in a single pixel space, without the need to fill each pixel space separately. The filling method is more convenient, the manufacturing speed is improved, and the filling amount of the polar liquid and non-polar liquid can be well controlled.

[0008] According to some embodiments of the present invention, the method for preparing an electrowetting display screen further includes: preparing a second cover plate assembly; preparing the second cover plate assembly includes: providing a second substrate, the second substrate including a second glass substrate, a second conductive layer and an insulating layer stacked in sequence; spin coating a hydrophobic layer on the insulating layer; covering the second cover plate assembly on a sealing frame, including: covering the side of the second cover plate assembly provided with the hydrophobic layer on the sealing frame.

[0009] According to some embodiments of the present invention, before the step of laminating the sealing frame on the first conductive layer, preparing the first cover plate assembly further includes: setting a partition frame on the first conductive layer so that the partition frame encloses a plurality of pixel walls within the frame of the partition frame, and the sealing frame encloses the partition frame within the frame of the sealing frame.

[0010] According to the electrowetting display screen of the second embodiment of the present invention, the electrowetting display screen is prepared by the preparation method of the electrowetting display screen in any of the above embodiments; the electrowetting display screen includes a second cover plate assembly, a first cover plate assembly, a polar liquid and a non-polar liquid; the first cover plate assembly includes a first glass substrate, a first conductive layer, a plurality of pixel walls and a sealing frame, and the first conductive layer is stacked on the first glass substrate; the plurality of pixel walls are arranged on the first conductive layer and surround a plurality of pixel spaces, and any two adjacent pixel walls are arranged at intervals so that the plurality of pixel spaces are interconnected, and the pixel spaces are used to fill polar liquids and non-polar liquids, and the polar liquids and non-polar liquids can flow between the plurality of pixel spaces through the gaps between adjacent pixel walls; the sealing frame surrounds a first accommodating space, and the plurality of pixel walls are arranged in the first accommodating space; wherein the second cover plate assembly is covered on the sealing frame to close the first accommodating space.

[0011] According to some embodiments of the present invention, the second cover assembly includes a second glass substrate, a second conductive layer, an insulating layer and a hydrophobic layer stacked in sequence; the second cover assembly is arranged on one side of the hydrophobic layer and covers the sealing frame to enclose multiple pixel spaces; and / or, the first cover assembly also includes a partition frame, which is connected to the first conductive layer and is arranged in the first accommodating space; the partition frame surrounds a second accommodating space, and a plurality of pixel walls are arranged in the second accommodating space.

[0012] According to some embodiments of the present invention, a plurality of pixel walls further enclose a plurality of connected spaces, wherein the connected spaces connect at least two adjacent pixel spaces; the connected spaces are used for allowing polar liquid and non-polar liquid to flow between adjacent pixel spaces.

[0013] According to some embodiments of the present invention, the first cover assembly further includes a shunt member connected to the first conductive layer and spaced apart from the pixel wall; and a shunt member is protrudingly disposed in at least one of the communicating spaces.

[0014] According to some embodiments of the present invention, the flow diverter includes at least one flow guiding surface, which is arranged in an arc-shaped concave shape and extends into two adjacent pixel spaces.

[0015] According to some embodiments of the present invention, any pixel space is surrounded by at least three pixel walls, and the at least three pixel walls are distributed in a circular shape and spaced apart in sequence to enclose the pixel space; two adjacent pixel walls among the at least three pixel walls can form a connected space with two adjacent pixel walls among the at least three pixel walls that enclose another pixel space.

[0016] A display device according to an embodiment of the third aspect of the present invention includes the electrowetting display screen in any one of the above embodiments.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0019] Figure 1 A schematic cross-sectional view of the electrowetting display screen provided by an embodiment of the present invention is shown;

[0020] Figure 2 A schematic structural diagram of an electrowetting display screen provided by an embodiment of the present invention is shown;

[0021] Figure 3 A schematic structural diagram of an electrowetting display screen provided by another embodiment of the present invention is shown;

[0022] Figure 4 A schematic structural diagram of a first cover plate assembly provided by an embodiment of the present invention is shown;

[0023] Figure 5 A schematic structural diagram of a second cover plate assembly provided by an embodiment of the present invention is shown;

[0024] Figure 6 A flow chart of a method for manufacturing an electrowetting display screen provided by an embodiment of the present invention is shown.

[0025] Reference numerals:

[0026] Electrowetting display screen 100;

[0027] First cover assembly 110; first glass substrate 111; first conductive layer 113; pixel wall 115; first pixel wall 1151; second pixel wall 1153; third pixel wall 1155; fourth pixel wall 1157; fifth pixel wall 1159; pixel space 117; first pixel space 1171; second pixel space 1173; third pixel space 1175; fourth pixel space 1177; connecting space 119; first connecting space 1191; second connecting space 1193; third connecting space 1195; fourth connecting space 1197; fifth connecting space 1199; sealing frame 121; partition frame 123; diverter 125; diverter surface 1251;

[0028] Second cover assembly 130; second glass substrate 131; second conductive layer 133; insulating layer 135; hydrophobic layer 137;

[0029] Polar liquid 150; non-polar liquid 170. DETAILED DESCRIPTION

[0030] The following describes embodiments of the present invention in detail. Examples of the embodiments 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 intended only to explain the present invention and are not to be construed as limiting the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They 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. Therefore, they cannot be understood as limitations on the present invention.

[0032] In the description of the present invention, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting 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.

[0034] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0035] See also Figures 1 to 2 , an embodiment of the present application provides a display device, which may be an electronic paper display or other display devices.

[0036] The display device may include an electrowetting display screen 100 , which may achieve a paper-like display effect.

[0037] In some embodiments, the electrowetting display screen 100 includes a first cover assembly 110 , a second cover assembly 130 , a polar liquid 150 , and a non-polar liquid 170 . The first cover assembly 110 includes a first glass substrate 111 , a first conductive layer 113 , a plurality of pixel walls 115 , and a sealing frame 121 .

[0038] The first conductive layer 113 is stacked on the first glass substrate 111 , and the first conductive layer 113 can serve as an electrode to cooperate with the conductive structure on the second cover assembly 130 to form a positive / negative electrode.

[0039] The first conductive layer 113 may be an indium tin oxide (ITO) layer or other conductive layers.

[0040] A plurality of pixel walls 115 are disposed on the first conductive layer 113 and enclose a plurality of pixel spaces 117. Any two adjacent pixel walls 115 are spaced apart so that the plurality of pixel spaces 117 are interconnected. The pixel spaces 117 are used to be filled with a polar liquid 150 and a non-polar liquid 170. The polar liquid 150 and the non-polar liquid 170 can flow between the plurality of pixel spaces 117 through the gaps between adjacent pixel walls 115. In this way, when performing a process of filling the polar liquid 150 and the non-polar liquid 170, filling can be performed within a single pixel space 117 (for example, a one drop filling process (ODF) can be used). The polar liquid 150 and the non-polar liquid 170 can flow from the gaps between the pixel walls to the remaining pixel spaces 117, eliminating the need to fill each pixel space 117 individually. This filling method is more convenient, improves manufacturing speed, and can better control the filling amount of the polar liquid 150 and the non-polar liquid 170.

[0041] It should be noted that when filling the polar liquid 150 and the non-polar liquid 170 , the filling order is set according to the needs.

[0042] As an example, the polar liquid 150 may be filled first and then the non-polar liquid 170 . Both the polar liquid 150 and the non-polar liquid 170 may be filled using a one-drop filling process.

[0043] The polar liquid 150 may be at least one of water, ethylene glycol, and propylene glycol.

[0044] The non-polar liquid 170 may be ink, and the color of the ink may be set as required. For example, the ink may be black ink.

[0045] The sealing frame 121 surrounds a first accommodating space, and a plurality of pixel walls 115 are disposed in the first accommodating space. The second cover assembly 130 is covered on the sealing frame 121 to seal the first accommodating space. In this way, the first conductive layer 113, the sealing frame 121, and the second cover assembly 130 can cooperate to seal the first accommodating space, which helps to improve the leakage of the polar liquid 150 and the non-polar liquid 170.

[0046] As an example, the sealing frame 121 may be bonded between the first conductive layer 113 and the second cover assembly 130 .

[0047] See also Figure 1 and Figure 4 In some embodiments, the first cover assembly 110 may further include a partition frame 123 .

[0048] Partition frame 123 can be connected to first conductive layer 113 and disposed within the first accommodation space. Partition frame 123 can enclose a second accommodation space, and multiple pixel walls 115 can be disposed within the second accommodation space. Thus, partition frame 123 can be disposed between the outer periphery of multiple pixel walls 115 and sealing frame 121, thereby helping to reduce contact between polar liquid 150 and non-polar liquid 170 and sealing frame 121, thereby improving the sealing performance of sealing frame 121. Furthermore, because partition frame 123 separates polar liquid 150 and non-polar liquid 170, sealing frame 121 can be assembled in a dry environment, reducing installation difficulty.

[0049] As an example, the outermost pixel walls 115 of several pixel walls 115 can be attached to the inner wall of the partition frame 123, and the outer wall of the partition frame 123 can be attached to the inner wall of the sealing frame 121, so that the partition frame 123 can separate the sealing frame 121 and the several pixel walls 115, which helps to reduce the polar liquid 150 and the non-polar liquid 170 from entering between the sealing frame 121 and the partition frame 123, and further reduce the polar liquid 150 and the non-polar liquid 170 from contacting the sealing frame 121, which helps to improve the sealing of the sealing frame 121.

[0050] See also Figures 1 to 2 In some embodiments, a plurality of pixel walls 115 may further enclose a plurality of connected spaces 119 .

[0051] The connecting space 119 can connect at least two adjacent pixel spaces 117 . The connecting space 119 is used to allow the polar liquid 150 and the non-polar liquid 170 to flow between the adjacent pixel spaces 117 , thereby improving the smoothness of the flow of the polar liquid 150 and the non-polar liquid 170 .

[0052] As an example, a plurality of pixel walls 115 enclose four pixel spaces 117 and five connected spaces 119, with the four pixel spaces 117 arranged in a rectangular pattern. The four pixel spaces 117 are defined as a first pixel space 1171, a second pixel space 1173, a third pixel space 1175, and a fourth pixel space 1177. The five connected spaces 119 are defined as a first connected space 1191, a second connected space 1193, a third connected space 1195, a fourth connected space 1197, and a fifth connected space 1199. The first connected space 1191 can be located at the center of the first pixel space 1171, the second pixel space 1173, the third pixel space 1175, and the fourth pixel space 1177. The second connected space 1193, the third connected space 1195, the fourth connected space 1197, and the fifth connected space 1199 can be arranged in a quadrilateral pattern at the periphery of the four pixel spaces 117.

[0053] Specifically, a first connecting space 1191 is provided at the center position of the first pixel space 1171, the second pixel space 1173, the third pixel space 1175 and the fourth pixel space 1177. The first connecting space 1191 can connect the first pixel space 1171, the second pixel space 1173, the third pixel space 1175 and the fourth pixel space 1177 respectively. In this way, when performing a one-drop filling process, the polar liquid 150 and the non-polar liquid 170 can be filled in only one of the first pixel space 1171, the second pixel space 1173, the third pixel space 1175 and the fourth pixel space 1177, and the polar liquid 150 and the non-polar liquid 170 can flow to the other three through the first connecting space 1191.

[0054] The first pixel space 1171 and the second pixel space 1173 can also be connected via the second connecting space 1193. This allows the first pixel space 1171 and the second pixel space 1173 to communicate with each other through the first connecting space 1191 and the second connecting space 1193, respectively. This helps provide another flow channel for the polar liquid 150 and the non-polar liquid 170, allowing them to more quickly and evenly fill the first pixel space 1171 and the second pixel space 1173. Similarly, the second pixel space 1173 and the third pixel space 1175 can also be connected via the third connecting space 1195, the third pixel space 1175 and the fourth pixel space 1177 can also be connected via the fourth pixel space 1177, and the fourth pixel space 1177 and the first pixel space 1171 can also be connected via the fifth connecting space 1199. These details will not be repeated here.

[0055] It should be noted that two adjacent pixel spaces 117 may refer to two pixel spaces 117 that are adjacent to each other laterally, or may refer to two pixel spaces 117 that are adjacent to each other diagonally.

[0056] As an example, the first pixel space 1171 and the second pixel space 1173 are adjacent to each other laterally, the second pixel space 1173 and the third pixel space 1175 are adjacent to each other laterally, the third pixel space 1175 and the fourth pixel space 1177 are adjacent to each other laterally, and the fourth pixel space 1177 and the first pixel space 1171 are adjacent to each other laterally. The first pixel space 1171 and the third pixel space 1175 are adjacent to each other diagonally, and the second pixel space 1173 and the fourth pixel space 1177 are also adjacent to each other diagonally.

[0057] See also Figures 1 to 3 In some embodiments, the first cover plate assembly 110 may further include a diverter 125 .

[0058] Among them, the diverter 125 can be connected to the first conductive layer 113 and can be spaced apart from the pixel wall 115. A diverter 125 is protrudingly provided in at least one connecting space 119. In this way, the filling liquid (i.e., the polar liquid 150 and the non-polar liquid 170) can flow in the adjacent pixel space 117 through the gap between the diverter 125 and the pixel wall 115, and the diverter 125 can limit and divert the filling liquid, which helps the filling liquid to evenly fill the adjacent pixel spaces 117, helps to ensure the stability of the liquid level, and helps to more conveniently and accurately control the capacity of the filling liquid in each pixel space 117.

[0059] The shape of the diverter 125 can be set according to needs. For example, the diverter 125 can be a cylinder, a prism, an elliptical cylinder or other shapes.

[0060] In some embodiments, the diverter 125 may include at least one guide surface, which may be arc-shaped and concave and extend into two adjacent pixel spaces 117. The guide surface may guide the flow direction of the polar liquid 150 and the non-polar liquid 170, thereby helping the polar liquid 150 and the non-polar liquid 170 to flow more smoothly and evenly into the adjacent pixel spaces 117.

[0061] The at least one guide surface may refer to one guide surface, two guide surfaces, three guide surfaces, four guide surfaces, or another number of guide surfaces.

[0062] As an example, the diverter 125 may include a guide surface, which may extend into the first pixel space 1171 and the second pixel space 1173, so that the guide surface can guide a portion of the filling liquid (i.e., the polar liquid 150 and the non-polar liquid 170) of the first pixel space 1171 to flow into the second pixel space 1173, and / or the guide surface can guide a portion of the filling liquid (i.e., the polar liquid 150 and the non-polar liquid 170) of the second pixel space 1173 to flow into the first pixel space 1171, which helps to make the filling liquid in the first pixel space 1171 and the second pixel space 1173 more uniform, helps to ensure the stability of the liquid level, and allows the staff to more accurately control the filling amount of the filling liquid.

[0063] As another example, the flow diverter 125 may include four flow guide surfaces, which are defined as a first flow guide surface, a second flow guide surface, a third flow guide surface, and a fourth flow guide surface, respectively. For example, the cross-section of the flow diverter 125 is approximately cross-shaped. The first flow guide surface may extend into the first pixel space 1171 and the second pixel space 1173, the second flow guide surface may extend into the second pixel space 1173 and the third pixel space 1175, the third flow guide surface may extend into the third pixel space 1175 and the fourth pixel space 1177, and the fourth flow guide surface may extend into the fourth pixel space 1177 and the first pixel space 1171. Thus, the first, second, third, and fourth flow guide surfaces can make the filling liquid in the first pixel space 1171, the second pixel space 1173, the third pixel space 1175, and the fourth pixel space 1177 more uniform, ensure the stability of the liquid level in each pixel space 117, and help the staff more accurately control the filling amount of the filling liquid.

[0064] See also Figures 1 to 2 In some embodiments, any pixel space 117 can be surrounded by at least three pixel walls 115, and the at least three pixel walls 115 can be distributed in a circular pattern to enclose the pixel space 117. Two adjacent pixel walls 115 among the at least three pixel walls 115 can form a connected space 119 with two adjacent pixel walls 115 among the at least three pixel walls 115 that enclose another pixel space 117, so that the connected space 119 can connect at least two adjacent pixel spaces 117.

[0065] As an example, first pixel space 1171 is surrounded by four pixel walls 115, including a first pixel wall 1151 and a second pixel wall 1153, which are spaced adjacent to each other. Second pixel space 1173 is surrounded by four pixel walls 115, including a second pixel wall 1153 and a third pixel wall 1155, which are spaced adjacent to each other. That is, second pixel wall 1153 can simultaneously serve as pixel wall 115 that encloses first pixel space 1171 and second pixel space 1173. The first pixel wall 1151 and second pixel wall 1153 that enclose first pixel space 1171, and the second pixel wall 1153 and third pixel wall 1155 that enclose second pixel space 1173, cooperate to form second connected space 1193.

[0066] As another example, the third pixel space 1175 is surrounded by four pixel walls 115, including a fourth pixel wall 1157 and a fifth pixel wall 1159 that are spaced apart and adjacent to each other. The first pixel wall 1151, the second pixel wall 1153, the fourth pixel wall 1157, and the fifth pixel wall 1159 can surround a first connected space 1191.

[0067] It can be understood that two adjacent pixel spaces 117 on the sides may share the same pixel wall 115 , and the connected space 119 connecting the two adjacent pixel spaces 117 may be surrounded by three pixel walls 115 .

[0068] See also Figure 1 and Figure 5 In some embodiments, the second cover assembly 130 includes a second glass substrate 131 , a second conductive layer 133 , an insulating layer 135 , and a hydrophobic layer 137 stacked in sequence.

[0069] Among them, the second conductive layer 133 can be an indium tin oxide (ITO) layer or other conductive layer, and the first conductive layer 113 and the second conductive layer 133 can cooperate to form the positive / negative poles of the electrowetting display screen 100, so as to adjust the surface tension of the polar liquid 150 and the hydrophobic layer 137 after conduction, change the contact angle between the two, and then cause the non-polar liquid 170 to deform and displace to display images and text.

[0070] The insulating layer 135 may be a dielectric layer, which is used to separate the hydrophobic layer 137 from the second conductive layer 133 to reduce the situation where the hydrophobic layer 137 is broken down by voltage.

[0071] The second cover assembly 130 is disposed on one side of the hydrophobic layer 137 and covers the sealing frame 121 to enclose the plurality of pixel spaces 117 .

[0072] As an example, the partition frame 123 and the sealing frame 121 may be adhered to the first conductive layer 113 and between the hydrophobic layer 137 .

[0073] Reference Figure 6 The embodiment of the present application also provides a method for preparing an electrowetting display screen. The method for preparing an electrowetting display screen can be used to prepare the electrowetting display screen in any of the above embodiments. The method for preparing an electrowetting display screen includes steps S010, S020 and S030.

[0074] Wherein, step S010: preparing a first cover plate assembly.

[0075] Step S010 may include steps S011 , S012 and S013 .

[0076] Step S011: providing a first substrate, wherein the first substrate comprises a stacked first glass substrate and a first conductive layer.

[0077] Step S012: forming a plurality of pixel walls on the first conductive layer, so that the plurality of pixel walls enclose a plurality of pixel spaces, and any two adjacent pixel walls are spaced apart so that the plurality of pixel spaces are interconnected.

[0078] Step S013: Laminating a sealing frame on the first conductive layer so that the sealing frame surrounds the plurality of pixel walls within the frame of the sealing frame.

[0079] This allows for the formation of multiple interconnected pixel spaces on the first cover assembly, allowing polar liquids and non-polar liquids to flow between the multiple pixel spaces. The sealing frame can confine both the polar liquid and the non-polar liquid within the sealing frame (i.e., the first accommodating space), helping to prevent liquid leakage.

[0080] The first conductive layer can be formed on the surface of the first glass substrate by a process such as electrode sputtering.

[0081] The plurality of pixel spaces may be formed on the surface of the first conductive layer by an etching process. Specifically, in some embodiments, step S012 may include the following steps:

[0082] (1) Spin-coat photoresist on the first conductive layer.

[0083] (2) Etching the photoresist to form several pixel walls and multiple pixel spaces.

[0084] Specifically, after spin coating photoresist on the first conductive layer, the photoresist is exposed and developed through a mask in a photolithography machine to obtain pixel walls and pixel spaces, that is, the pixel walls can be formed by photoresist.

[0085] Step S020: using a one-drop filling process to fill the polar liquid and the non-polar liquid into the plurality of pixel spaces.

[0086] Among them, polar liquid and non-polar liquid can flow between multiple pixel spaces through the gaps between adjacent pixel walls. In this way, there is no need to fill polar liquid and non-polar liquid separately in each pixel space. The filling method is more convenient, the manufacturing speed is improved, and the filling amount of polar liquid and non-polar liquid can be better controlled.

[0087] As an example, when filling polar liquid and non-polar liquid, you can choose to perform a one-drop filling process in the first pixel space. The filling liquid (i.e., polar liquid and non-polar liquid) can flow from the gaps between the pixel walls to the second pixel space, the third pixel space, and the fourth pixel space. This eliminates the need to fill the second pixel space, the third pixel space, and the fourth pixel space separately, and the filling method is more convenient.

[0088] In some embodiments, before step S013, step S010 may further include the step of: providing a partition frame on the first conductive layer, so that the partition frame encloses the plurality of pixel walls within the partition frame, and the sealing frame encloses the partition frame within the sealing frame.

[0089] In this way, the partition frame can block the filling liquid in the pixel space, which helps to assemble the sealing frame on the dry annular member, reduces the difficulty of assembling the sealing frame, and ensures the sealing effect of the sealing frame.

[0090] The partition frame can also be formed by etching with photoresist, that is, the partition frame and the pixel wall can be obtained by photoresist through exposure, development and other processes. Alternatively, the partition frame can also be a separate structural member that is bonded to the first conductive layer.

[0091] Step S030: Covering the second cover assembly on the sealing frame.

[0092] In this way, the second cover assembly can seal the first accommodating space, helping to prevent leakage of the filling liquid.

[0093] In the preparation method of the electrowetting display provided in the embodiment of the present application, by setting adjacent pixel walls to be spaced apart, a flow channel can be formed between any adjacent pixel spaces, so that the filling liquid can flow through the flow channel in each pixel space, and then a one-drop filling process can be used to fill the liquid in a single pixel space, without the need to fill each pixel space separately. The filling method is more convenient, the manufacturing speed is improved, and the filling amount of polar liquid and non-polar liquid can be well controlled.

[0094] In some embodiments, the method for preparing an electrowetting display screen may further include the step of preparing a second cover plate assembly.

[0095] Steps for preparing the second cover plate assembly may include the following steps:

[0096] (1) A second substrate is provided, wherein the second substrate includes a second glass substrate, a second conductive layer, and an insulating layer stacked in sequence.

[0097] (2) Spin-coat a hydrophobic layer on the insulating layer.

[0098] In this way, the hydrophobic layer of the second cover plate assembly in this embodiment does not need to undergo a modification process, which helps to avoid damage to the hydrophobic layer during the modification process, ensures the reliability of the electrowetting display screen, and extends the service life of the electrowetting display screen; and, since the hydrophobic layer does not need to undergo a modification process, the preparation process of the electrowetting display screen is simplified and the manufacturing cost is reduced.

[0099] Specifically, in the related art, a photoresist is usually spin-coated on a hydrophobic layer to form a pixel structure (i.e., a pixel wall and a pixel space). However, the hydrophobic layer and the photoresist do not wet each other, making it difficult to spin-coat the photoresist on the hydrophobic layer. Therefore, a modification process is required for the hydrophobic layer (e.g., etching the hydrophobic layer using a plasma etcher) to make the hydrophobic layer more hydrophilic in order to facilitate spin-coating the photoresist on the hydrophobic layer. However, since the hydrophobic layer has undergone a modification process and has better hydrophilicity, this will affect the flow of polar liquids. Therefore, a secondary modification process (e.g., a high-temperature reflow process) is required to restore the hydrophobicity of the hydrophobic layer. That is, the related art requires the hydrophobic layer to undergo two modification processes, which can easily cause irreparable defects in the hydrophobic layer, affecting the reliability and service life of the electrowetting display screen, and resulting in a complicated preparation method for the electrowetting display screen and increased manufacturing costs.

[0100] In the embodiment of the present application, the pixel wall is arranged on the first conductive layer of the first cover plate assembly (that is, the photoresist used to prepare the pixel structure is spin-coated on the first conductive layer), and there is no need to spin-coat the photoresist on the hydrophobic layer, so there is no need to modify the hydrophobic layer, which simplifies the preparation process of the electrowetting display screen, reduces the manufacturing cost, and ensures the reliability and service life of the electrowetting display screen.

[0101] The hydrophobic layer may be made of fluororesin material or other hydrophobic insulating materials.

[0102] In some embodiments, the above step S030 may include the step of: covering the sealing frame with one side of the second cover assembly provided with the hydrophobic layer.

[0103] In this way, the hydrophobic layer can contact the polar liquid to ensure the fluidity of the polar liquid, so that the display screen can display the required graphic information more sensitively.

[0104] In the preparation method of the electrowetting display screen, the electrowetting display screen and the display device provided in the embodiments of the present application, the preparation method of the electrowetting display screen includes: preparing a first cover plate assembly, and preparing the first cover plate assembly includes: providing a first substrate, the first substrate including a stacked first glass substrate and a first conductive layer; forming a plurality of pixel walls on the first conductive layer so that the plurality of pixel walls enclose a plurality of pixel spaces, and any two adjacent pixel walls are spaced apart so that the plurality of pixel spaces are interconnected; attaching a sealing frame on the first conductive layer so that the sealing frame encloses the plurality of pixel walls within the frame of the sealing frame; using a one-drop filling process to fill the plurality of pixel spaces Polar liquid and non-polar liquid are filled in the pixel spaces, and the polar liquid and non-polar liquid can flow between multiple pixel spaces through the gaps between adjacent pixel walls; the second cover assembly is covered on the sealing frame, so that by setting the adjacent pixel walls to be spaced apart, a flow channel can be formed between any adjacent pixel spaces, so that the filling liquid can flow in each pixel space through the flow channel, and then a one-drop filling process can be used to fill the liquid in a single pixel space, without having to fill each pixel space separately. The filling method is more convenient, the manufacturing speed is improved, and the filling amount of the polar liquid and non-polar liquid can be well controlled.

[0105] While the embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to the embodiments described above. Various modifications may be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof may be combined with one another unless there is a conflict.

Claims

1. A method for preparing an electrowetting display screen, characterized in that: include: Preparing a first cover plate assembly, the preparing the first cover plate assembly comprising: Providing a first substrate, wherein the first substrate comprises a first glass substrate and a first conductive layer stacked together; forming a plurality of pixel walls on the first conductive layer, so that the plurality of pixel walls enclose a plurality of pixel spaces, and any two adjacent pixel walls are spaced apart so that the plurality of pixel spaces are interconnected; Laminating a sealing frame on the first conductive layer so that the sealing frame surrounds the plurality of pixel walls within the sealing frame; Filling the plurality of pixel spaces with a polar liquid and a non-polar liquid using a one-drop filling process, wherein the polar liquid and the non-polar liquid can flow between the plurality of pixel spaces through gaps between adjacent pixel walls; The second cover plate assembly is covered on the sealing frame.

2. The method for preparing an electrowetting display screen according to claim 1, wherein: The method for preparing the electrowetting display screen further includes: preparing a second cover plate assembly; The preparation of the second cover plate assembly comprises: Providing a second substrate, the second substrate comprising a second glass substrate, a second conductive layer, and an insulating layer stacked in sequence; Spin coating a hydrophobic layer on the insulating layer; The step of placing the second cover plate assembly on the sealing frame comprises: The second cover plate assembly is provided with a surface of the hydrophobic layer on which the second cover plate assembly is provided to cover the sealing frame.

3. The method for preparing an electrowetting display screen according to claim 1, wherein: Before the step of attaching the sealing frame to the first conductive layer, the step of preparing the first cover plate assembly further includes: A partition frame is provided on the first conductive layer, so that the partition frame encloses the plurality of pixel walls within the partition frame, and the sealing frame encloses the partition frame within the sealing frame.

4. An electrowetting display screen, characterized in that: The electrowetting display screen is prepared by the method for preparing an electrowetting display screen according to any one of claims 1 to 3; the electrowetting display screen comprises a second cover plate assembly, a first cover plate assembly, a polar liquid and a non-polar liquid; the first cover plate assembly comprises: a first glass substrate; a first conductive layer, the first conductive layer being stacked on the first glass substrate; a plurality of pixel walls, wherein the plurality of pixel walls are disposed on the first conductive layer and enclose a plurality of pixel spaces, wherein any two adjacent pixel walls are spaced apart so that the plurality of pixel spaces are interconnected, the pixel spaces being used to be filled with the polar liquid and the non-polar liquid, and the polar liquid and the non-polar liquid can flow between the plurality of pixel spaces through the gaps between adjacent pixel walls; and a sealing frame, wherein the sealing frame encloses a first accommodating space, and the plurality of pixel walls are disposed in the first accommodating space; Wherein, the second cover assembly is covered on the sealing frame to close the first accommodating space.

5. The electrowetting display screen according to claim 4, characterized in that: The second cover assembly includes a second glass substrate, a second conductive layer, an insulating layer, and a hydrophobic layer stacked in sequence; the second cover assembly is disposed on one side of the hydrophobic layer and covers the sealing frame to enclose the plurality of pixel spaces; And / or, the first cover assembly further includes a partition frame, which is connected to the first conductive layer and disposed in a first accommodating space; the partition frame surrounds a second accommodating space, and the plurality of pixel walls are disposed in the second accommodating space.

6. The electrowetting display screen according to claim 4, characterized in that: The plurality of pixel walls further enclose a plurality of connected spaces, wherein the connected spaces at least connect two adjacent pixel spaces; The communication space is used to allow the polar liquid and the non-polar liquid to flow between adjacent pixel spaces.

7. The electrowetting display screen according to claim 6, characterized in that: The first cover assembly further includes a shunt member connected to the first conductive layer and spaced apart from the pixel wall; The diverter is protrudingly provided in at least one of the communicating spaces.

8. The electrowetting display screen according to claim 7, characterized in that: The flow dividing member includes at least one flow guiding surface, which is arranged in an arc-shaped concave shape and extends into two adjacent pixel spaces.

9. The electrowetting display screen according to claim 6, characterized in that: Any of the pixel spaces is surrounded by at least three pixel walls, and the at least three pixel walls are arranged in a ring-like shape and spaced apart in sequence to enclose the pixel space; Two adjacent pixel walls among the at least three pixel walls may enclose the connected space with two adjacent pixel walls among the at least three pixel walls that enclose another pixel space.

10. A display device, characterized in that: The device comprises the electrowetting display screen according to any one of claims 4 to 9.

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