Transmission type electrophoretic display device and manufacturing method thereof

Abstract

The invention provides a transmission type electrophoretic display device and a manufacturing method thereof. The transmissive electrophoretic display device has a plurality of pixel regions. Each pixel area is provided with a light-transmitting area and a non-light-transmitting area. The transmission type electrophoresis display device comprises an element array substrate, a spacing layer, an electrophoresis layer and a light-transmitting conductive substrate. The element array substrate includes a plurality of first control electrodes respectively disposed in the plurality of light-transmitting regions and a plurality of second control electrodes respectively disposed in the plurality of non-light-transmitting regions. The spacer layer is disposed on the element array substrate and has a plurality of openings. In a profile map, two adjacent partition walls of the partition layer are arranged on the opposite sides of the corresponding first control electrodes respectively. The electrophoretic layer is disposed in the plurality of openings. The light-transmitting conductive substrate covers the spacing layer and the electrophoresis layer.

Description

Technical Field

[0001] This invention relates to an electrophoretic display device and its manufacturing method, and more particularly to a transmissive electrophoretic display device and its manufacturing method. Background Technology

[0002] In traditional electrophoretic display devices, the front plane laminate of the electronic paper with the electrophoretic layer is attached to the element array substrate via an adhesive layer. Because the pixel electrodes in the element array substrate are usually not aligned with the microcapsules or microcup electrophoresis in the electrophoretic layer, and the adhesive layer is dark in color, traditional electrophoretic display devices are usually opaque. Summary of the Invention

[0003] The present invention provides a transmissive electrophoretic display device and a method for manufacturing the same, wherein the transmissive electrophoretic display device is light-transmitting.

[0004] According to an embodiment of the present invention, a transmissive electrophoretic display device has multiple pixel regions. Each of the multiple pixel regions has a light-transmitting region and a light-blocking region. The transmissive electrophoretic display device includes an element array substrate, a spacer layer, an electrophoretic layer, and a light-transmitting conductive substrate. The element array substrate includes multiple first control electrodes and multiple second control electrodes. The multiple first control electrodes are respectively disposed in multiple light-transmitting regions of the multiple pixel regions. The multiple second control electrodes are respectively disposed in multiple light-blocking regions of the multiple pixel regions. The spacer layer is disposed on the element array substrate and has multiple openings that expose the multiple light-transmitting regions. In a cross-sectional view, the spacer layer includes multiple spacer walls, and two adjacent spacer walls are respectively disposed on opposite sides of a corresponding first control electrode among the multiple first control electrodes. The electrophoretic layer is disposed in the multiple openings. The light-transmitting conductive substrate covers the spacer layer and the electrophoretic layer.

[0005] According to another embodiment of the present invention, a transmissive electrophoretic display device has a plurality of pixel regions. Each of the plurality of pixel regions has a light-transmitting region and a light-blocking region. A method for manufacturing the transmissive electrophoretic display device includes: providing a component array substrate, the component array substrate including a plurality of first control electrodes and a plurality of second control electrodes, wherein the plurality of first control electrodes are respectively disposed in a plurality of light-transmitting regions of the plurality of pixel regions, and the plurality of second control electrodes are respectively disposed in a plurality of light-blocking regions of the plurality of pixel regions; forming a spacer layer on the component array substrate by photolithography, the spacer layer having a plurality of openings respectively exposing the plurality of light-transmitting regions; filling the plurality of openings with an electrophoretic layer; and covering the spacer layer and the electrophoretic layer with a light-transmitting conductive substrate.

[0006] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0007] The accompanying drawings are included to further illustrate the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0008] Figure 1 , Figure 2 as well as Figure 3 These are three top views of the same area of ​​a transmissive electrophoretic display device according to some embodiments of the present disclosure, which respectively show different elements in the area to clearly show the relative arrangement relationship between the different elements;

[0009] Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 as well as Figure 12 These are partial cross-sectional schematic diagrams of various transmissive electrophoretic display devices according to some embodiments of this disclosure, and Figures 4 to 12 For example, it corresponds to Figures 1 to 3 The cross section along the central section line I-I'. Detailed Implementation

[0010] The directional terms used in this document, such as "up," "down," "front," "back," "left," and "right," are only for reference to the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the invention.

[0011] In the accompanying drawings, the figures illustrate general features of the methods, structures, and / or materials used in specific embodiments. However, these figures should not be construed as defining or limiting the scope or nature covered by these embodiments. For example, for clarity, the relative dimensions, thicknesses, and locations of various films, regions, or structures may be reduced or enlarged.

[0012] In the accompanying drawings, the same or similar elements will be denoted by the same or similar reference numerals, and their description will be omitted in the specification. Furthermore, features in different embodiments may be combined with each other without conflict, and simple equivalent changes and modifications made in accordance with this specification or claims are still within the scope of this invention.

[0013] The terms "first," "second," etc., used in this specification or claims are only used to name different elements or distinguish different embodiments or scopes, and are not intended to limit the upper or lower limit of the number of elements, nor to limit the manufacturing or placement order of the elements. Furthermore, the statement that one element / film layer is disposed on (or above) another element / film layer can cover the case where the element / film layer is directly disposed on (or above) the other element / film layer and the two element / film layers are in direct contact; and the case where the element / film layer is indirectly disposed on (or above) the other element / film layer and one or more element / film layers exist between the two element / film layers.

[0014] Figure 1 , Figure 2 as well as Figure 3 These are three top views of the same area of ​​a transmissive electrophoretic display device according to some embodiments of the present disclosure, showing different elements in the area to clearly show the relative arrangement relationship between the different elements. Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 as well as Figure 12 These are partial cross-sectional schematic diagrams of various transmissive electrophoretic display devices according to some embodiments of this disclosure, and Figures 4 to 12 For example, it corresponds to Figures 1 to 3 The cross section along the central section line I-I'.

[0015] Please refer to Figures 1 to 4 The transmissive electrophoretic display device 1 has multiple pixel regions P. Each of the multiple pixel regions P has a light-transmitting region P1 and a light-blocking region P2. The transmissive electrophoretic display device 1 includes an element array substrate 10, a spacer layer 11, an electrophoretic layer 12, and a light-transmitting conductive substrate 13. The element array substrate 10 includes multiple first control electrodes 100 and multiple second control electrodes 102. The multiple first control electrodes 100 are respectively disposed in multiple light-transmitting regions P1 of the multiple pixel regions P. The multiple second control electrodes 102 are respectively disposed in multiple light-blocking regions P2 of the multiple pixel regions P. The spacer layer 11 is disposed on the element array substrate 10 and has multiple openings A that respectively expose the multiple light-transmitting regions P2. In the cross-sectional view, as shown... Figure 4 As shown, the spacer layer 11 includes a plurality of spacer walls 110, and two adjacent spacer walls 110 are respectively disposed on opposite sides of a corresponding first control electrode 100 among the plurality of first control electrodes 100. An electrophoretic layer 12 is disposed in a plurality of openings A. A light-transmitting conductive substrate 13 covers the spacer layer 11 and the electrophoretic layer 12.

[0016] For details, please refer to... Figure 1 . Figure 1 The diagram schematically shows twelve pixel regions P in the transmissive electrophoretic display device 1, but the number of pixel regions P is not limited to this. For ease of identification, Figure 1 Each pixel region P is indicated by a thick dashed line. In some embodiments, multiple pixel regions P can be arranged in an array to achieve the display of a surface. In some embodiments, such as Figure 1 As shown, the top view shape of each pixel region P can be hexagonal, and multiple pixel regions P can be arranged in an alternating manner to improve the aperture ratio and / or resolution, but this is not a limitation.

[0017] Each pixel region P has a light-transmitting region P1 and a light-blocking region P2, where the light-transmitting region P1 allows light to pass through, while the light-blocking region P2 can be used to house opaque components or films (such as switching elements, metal traces, storage capacitors, and / or multiple spacers). In some embodiments, although not shown, the aforementioned opaque components or films can be shielded by providing a light-shielding layer (such as a black matrix, dark ink, or other light-shielding material) in the light-blocking region P2. For ease of identification, Figure 1 The transparent area P1 is shown on a white background, and the non-transparent area P2 is shown with a dotted pattern.

[0018] In some embodiments, a non-transparent area P2 in each pixel region P may be connected to a transparent area P1 and located on at least one side of the transparent area P1. In some embodiments, such as Figure 1 As shown, the non-transparent area P2 in each pixel area P may surround the transparent area P1. In some embodiments, such as Figure 1 As shown, the top view shape of the light-transmitting area P1 can be hexagonal, while the top view shape of the non-light-transmitting area P2 can be hexagonal annular, but is not limited thereto. In some embodiments, such as Figure 1 As shown, multiple non-transparent areas P2 of multiple pixel areas P can be connected to each other, and two adjacent transparent areas P1 can be separated by two connected non-transparent areas P2.

[0019] In the top view, as Figure 1As shown, if the area of ​​the light-transmitting area P1 is A1 and the area of ​​the non-light-transmitting area P2 is A2, then the area of ​​the pixel area P is (A1+A2). The aperture ratio of the pixel area P can be defined as the area of ​​the light-transmitting area P1 divided by the area of ​​the pixel area P and then multiplied by 100%, that is, [A1 / (A1+A2)]*100%. By controlling the aperture ratio of multiple pixel areas P, the transmissive electrophoretic display device 1 is made to be entirely translucent, thus enabling a wider range of applications. For example, the transmissive electrophoretic display device 1 can be applied to windows or doors of display windows, transportation vehicles (such as sightseeing buses, ships, vehicle bodies, etc.), or commercial buildings to provide intelligent operation, introduction, guidance, or tour guide services. In some embodiments, the aperture ratio of the multiple pixel areas P can be 60% to 80%, that is, 60%≦[A1 / (A1+A2)]*100%≦80%, but is not limited thereto.

[0020] Please refer to Figure 2 as well as Figure 4 The element array substrate 10 is, for example, an active element array substrate, wherein at least one first control electrode 100 may be disposed in each light-transmitting region P1, and at least one second control electrode 102 may be disposed in each light-blocking region P2. The plurality of first control electrodes 100 disposed in the plurality of light-transmitting regions P1 may be made of a light-transmitting conductive material to improve the light transmittance of the plurality of light-transmitting regions P1. On the other hand, the plurality of second control electrodes 102 disposed in the plurality of light-blocking regions P2 may be made of a light-transmitting conductive material or a light-blocking conductive material. The light-transmitting conductive material may include metal oxides, graphene, other suitable transparent conductive materials, or combinations thereof. The metal oxide may include indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium germanium zinc oxide, or other metal oxides. The light-blocking conductive material may include metals, alloys, or combinations thereof. If the plurality of first control electrodes 100 and the plurality of second control electrodes 102 are made of the same conductive material (such as a light-transmitting conductive material), the plurality of first control electrodes 100 and the plurality of second control electrodes 102 may be formed using the same patterning process to simplify the manufacturing steps. If the multiple second control electrodes 102 are made of opaque conductive materials such as metals, alloys or combinations thereof, the multiple second control electrodes 102 may have lower impedance and / or better electrical conductivity.

[0021] In some embodiments, in a top view, such as Figure 2 As shown, the area of ​​the first control electrode 100 may be slightly smaller than the area of ​​the light-transmitting region P1, but is not limited thereto. In other embodiments, the area of ​​the first control electrode 100 may be equal to the area of ​​the light-transmitting region P1, or the area of ​​the first control electrode 100 may be slightly larger than the area of ​​the light-transmitting region P1, such that a portion of the first control electrode 100 extends into the non-light-transmitting region P2. In some embodiments, in a top view, as... Figure 2As shown, multiple second control electrodes 102 may surround multiple first control electrodes 100 respectively. For example, the top view shape of the first control electrode 100 may be hexagonal, while the top view shape of the second control electrode 102 may be hexagonal ring, but is not limited thereto.

[0022] In some embodiments, a plurality of first control electrodes 100 may be electrically connected to each other, and a plurality of second control electrodes 102 may be electrically independent of each other. Figure 2 For example, the component array substrate 10 may also include multiple connection lines CL, and multiple first control electrodes 100 can be electrically connected to each other through the multiple connection lines CL. Figure 2 For example, each connecting line CL crosses two adjacent second control electrodes 102 to electrically connect two adjacent first control electrodes 100. In this architecture, multiple connecting lines CL and multiple second control electrodes 102 are formed sequentially, and the multiple connecting lines CL are electrically insulated from the multiple second control electrodes 102 by at least one insulating layer (not shown).

[0023] For example, multiple connecting lines CL can be formed with multiple first control electrodes 100 using the same conductive material (e.g., a light-transmitting conductive material) and the same patterning process, while multiple second control electrodes 102 are formed after or before the multiple connecting lines CL and the multiple first control electrodes 100. Alternatively, the multiple first control electrodes 100 and the multiple second control electrodes 102 can be formed with the same conductive material (e.g., a light-transmitting conductive material) and the same patterning process, while multiple connecting lines CL are formed after or before the multiple first control electrodes 100 and the multiple second control electrodes 102. Alternatively, the multiple connecting lines CL, the multiple first control electrodes 100, and the multiple second control electrodes 102 are not formed simultaneously.

[0024] When the area of ​​the first control electrode 100 is equal to or slightly smaller than the area of ​​the light-transmitting region P1, the connecting lines CL are at least partially disposed within the light-transmitting region P1. In this architecture, the multiple connecting lines CL are made, for example, of a light-transmitting conductive material to improve the light transmittance of the multiple light-transmitting regions P1. Alternatively, the multiple connecting lines CL can be made of an opaque conductive material, and the adverse effects of the multiple connecting lines CL on the light transmittance can be reduced by designing the linewidth, thickness, number, or connection method of the connecting lines CL.

[0025] When the area of ​​the first control electrode 100 is slightly larger than the area of ​​the light-transmitting region P1, the multiple connecting lines CL may not overlap with the multiple light-transmitting regions P1 in the Z direction. In this architecture, the multiple connecting lines CL can be made of light-transmitting conductive material or opaque conductive material.

[0026] In other embodiments, multiple first control electrodes 100 can be electrically connected by replacing multiple connection lines CL with other conductive features (such as conductive vias or other lines).

[0027] In some embodiments, such as Figure 3 As shown, the component array substrate 10 may further include multiple scan lines SL and multiple data lines DL. The multiple scan lines SL and multiple data lines DL are interleaved, and the multiple scan lines SL are electrically insulated from the multiple data lines DL by at least one insulating layer (not shown). In some embodiments, such as Figure 3 As shown, multiple scan lines SL and multiple data lines DL are all disposed in multiple non-transparent areas P2 of multiple pixel areas P. In some embodiments, such as Figure 3 As shown, each of the multiple scan lines SL and multiple data lines DL may extend along the boundaries of the multiple pixel regions P, but is not limited thereto. In some embodiments, although not shown, the element array substrate 10 may also include multiple switching elements, multiple common electrode lines, multiple power lines and / or multiple storage capacitors, etc., and the above-mentioned elements may be disposed in multiple non-transparent regions P2 of the multiple pixel regions P.

[0028] Please refer to Figure 4 The spacer layer 11 is formed on the device array substrate 10, for example, by a photolithography process. In other words, the spacer layer 11 can be in direct contact with the device array substrate 10, and there may be no dark adhesive layer between the spacer layer 11 and the device array substrate 10 as is used in the prior art for attaching electronic paper films to the device array substrate. For example, the material of the spacer layer 11 may include photoresist, such as positive photoresist or negative photoresist, but the material of the spacer layer 11 is not limited to photoresist. In other embodiments, the spacer layer 11 may be formed using other dielectric or insulating materials, and the plurality of openings A of the spacer layer 11 may be formed using any suitable patterning process (such as laser drilling, etching, other processes, or combinations thereof). The plurality of openings A are respectively surrounded by a plurality of spacer walls 110 of the spacer layer 11. In a cross-sectional view, as shown Figure 4 As shown, the multiple partition walls 110 may be trapezoidal in shape, but are not limited thereto. In other embodiments, the multiple partition walls 110 may be inverted trapezoidal or other shapes (depending on the patterning process and its parameters).

[0029] In the cross-sectional view, such as Figure 4 As shown, two adjacent partition walls 110 are respectively disposed on opposite sides (e.g., left and right sides) of a corresponding first control electrode 100. In some embodiments, the two adjacent partition walls 110 may not overlap with the corresponding first control electrode 100 in the Z direction. In some embodiments, in a cross-sectional view, as shown... Figure 4As shown, a plurality of spacer walls 110 may be disposed at the boundary B of a plurality of pixel regions P, and one of the spacer walls 110 may be disposed above two adjacent second control electrodes 102 among the plurality of second control electrodes 102. In some embodiments, the spacer wall 110 is disposed, for example, as a gap G between two adjacent second control electrodes 102 below it, and the two adjacent second control electrodes 102 maintain independent electrical properties through the gap G.

[0030] Each second control electrode 102 may have an outer edge EP adjacent to an adjacent second control electrode 102 and an inner edge EI adjacent to a first control electrode 100. In some embodiments, the outer edge EP of the second control electrode 102 overlaps with the spacer wall 110 in the Z direction, and the inner edge EI of the second control electrode 102 may not overlap with the spacer wall 110 in the Z direction. For example, the side of the second control electrode 102 adjacent to the first control electrode 100 may extend from the spacer wall 110 to the edge of the opaque region P2, such that the inner edge EI of the second control electrode 102 is not covered by the spacer wall 110.

[0031] The electrophoretic layer 12 is disposed in a plurality of openings A. In some embodiments, such as Figure 4 As shown, the electrophoretic layer 12 may include an electrophoretic solution 120 and a plurality of white electrophoretic particles 122, but is not limited thereto. The electrophoretic solution 120 and the plurality of white electrophoretic particles 122 may be filled into a plurality of openings A by coating, but is not limited thereto. In some embodiments, the electrophoretic solution 120 may be transparent. The plurality of white electrophoretic particles 122 are distributed in the electrophoretic solution 120, and the plurality of white electrophoretic particles 122 may be charged particles with reflective properties. By controlling the voltage of the plurality of first control electrodes 100 and the plurality of second control electrodes 102, the distribution of the plurality of white electrophoretic particles 122 can be controlled, thereby controlling the state presented by each pixel area P of the transmissive electrophoretic display device 1 (e.g., reflective state or transparent state) or controlling the image displayed by the transmissive electrophoretic display device 1.

[0032] The following example illustrates the phenomenon of multiple negatively charged white electrophoretic particles 122. By applying a negative voltage to the first control electrode 100 and the second control electrode 102 in pixel region P, based on the principle of like charges repelling each other, the multiple white electrophoretic particles 122 will be repelled by the first control electrode 100 and the second control electrode 102 and distributed on the side of opening A away from the first control electrode 100 and the second control electrode 102 (e.g., the top of opening A), as shown below. Figure 4The first and third pixel regions P, counting from the left, are shown in the image. Because the white electrophoretic particles 122 have reflective properties, light incident on pixel region P is reflected by the multiple white electrophoretic particles 122 distributed at the top of opening A, meaning pixel region P appears as a reflected state or a white image. On the other hand, by applying a negative voltage to the first control electrode 100 in pixel region P and a positive voltage to the second control electrode 102 in pixel region P, based on the principle of like charges repelling and unlike charges attracting, the multiple white electrophoretic particles 122 are repelled by the first control electrode 100 and attracted by the second control electrode 102, distributing themselves near the second control electrode 102 (e.g., distributed at the bottom edge of opening A), such as... Figure 4 The second and fourth pixel regions P from the left are shown in the image. Due to the light-transmitting properties of the electrophoretic solution 120, light incident on pixel region P will pass through it, meaning that pixel region P is in a transparent state (a state where light can pass through). The portion of the second control electrode 102 not covered by the partition wall 110 can effectively attract multiple white electrophoretic particles 122, causing these particles to concentrate at the bottom edge of the opening A, thereby ensuring the light transmittance of pixel region P in the transparent state.

[0033] In other embodiments, although not shown, the plurality of white electrophoretic particles 122 may be replaced with electrophoretic particles of other colors to provide a color display image.

[0034] A light-transmitting conductive substrate 13 is disposed above the spacer layer 11 and the electrophoretic layer 12. In some embodiments, the transmissive electrophoretic display device 1 may further include a light-transmitting adhesive layer 14, and the light-transmitting conductive substrate 13 can be attached to the spacer layer 11 through the light-transmitting adhesive layer 14. The light-transmitting adhesive layer 14 may include optically clear adhesive (OCA) or optically clear resin (OCR), but is not limited thereto. The light-transmitting conductive substrate 13 may include a light-transmitting substrate 130 and a light-transmitting conductive layer 132. The material of the light-transmitting substrate 130 may include glass, quartz, ceramic, sapphire, or plastic, but is not limited thereto. The light-transmitting conductive layer 132 is disposed on the surface of the light-transmitting substrate 130 facing the spacer layer 11 and may be made of the aforementioned light-transmitting conductive material. In some embodiments, a fixed voltage may be applied to the light-transmitting conductive layer 132, but is not limited thereto.

[0035] In some embodiments, a method for manufacturing a transmissive electrophoretic display device 1 may include: providing a component array substrate 10, the component array substrate 10 including a plurality of first control electrodes 100 and a plurality of second control electrodes 102, wherein the plurality of first control electrodes 100 are respectively disposed in a plurality of light-transmitting regions P1 in a plurality of pixel regions P, and the plurality of second control electrodes 102 are respectively disposed in a plurality of non-light-transmitting regions P2 in a plurality of pixel regions P; forming a spacer layer 11 on the component array substrate 10 by photolithography, the spacer layer 11 having a plurality of openings A that respectively expose the plurality of light-transmitting regions P1; filling the plurality of openings A with an electrophoretic layer 12; and covering the spacer layer 11 and the electrophoretic layer 12 with a light-transmitting conductive substrate 13.

[0036] In some embodiments, as described above, forming the spacer layer 11 may include forming a plurality of spacer walls 110 at the junction B of the plurality of pixel regions P, wherein one of the spacer walls 110 is disposed above two adjacent second control electrodes 102 of the plurality of second control electrodes 102. In some embodiments, as described above, the material of the spacer layer 11 may include photoresist, and in a cross-sectional view, as shown... Figure 4 As shown, the shape of the plurality of spacer walls 110 can be trapezoidal or inverted trapezoidal. In some embodiments, as described above, the light-transmitting conductive substrate 13 can be attached to the spacer layer 11 through the light-transmitting adhesive layer 14.

[0037] Please refer to Figure 5 Transmissive electrophoresis display device 1A and Figure 4 The main difference between the transmissive electrophoresis display device 1A and the transmissive electrophoresis display device 1A is that the transmissive electrophoresis display device 1A also includes a plurality of sidewall electrodes 15. The plurality of sidewall electrodes 15 are respectively disposed on a plurality of sidewalls SW of a plurality of spacers 110 and are respectively electrically connected to a plurality of second control electrodes 102. In some embodiments, such as Figure 5 As shown, the sidewall electrode 15 can extend further from the sidewall SW of the partition wall 110 to the top surface ST of the partition wall 110. In the cross-sectional view, as... Figure 5 As shown, two adjacent sidewall electrodes 15 located on opposite sides (e.g., left and right sides) of the partition wall 110 are separated from each other and electrically independent. In some embodiments, the sidewall electrodes 15 can be electrically connected to the corresponding second control electrode 102 through direct contact. Alternatively, although not shown, the sidewall electrodes 15 and the corresponding second control electrode 102 may not be in direct contact and can be electrically connected through conductive features (such as conductive vias, wires, or combinations thereof). The sidewall electrodes 15 may be made of a light-transmitting conductive material or an opaque conductive material.

[0038] Manufacturing method of transmissive electrophoretic display device 1A and Figure 4The main difference in the manufacturing method of the transmissive electrophoretic display device 1 is that the manufacturing method of the transmissive electrophoretic display device 1A may further include forming a plurality of sidewall electrodes 15 on a plurality of sidewalls SW of a plurality of spacer walls 110 of the spacer layer 11, and the plurality of sidewall electrodes 15 are electrically connected to a plurality of second control electrodes 102 respectively.

[0039] By setting multiple sidewall electrodes 15, the reaction rate of multiple white electrophoretic particles 122 can be increased or the reaction time of multiple white electrophoretic particles 122 can be shortened.

[0040] Please refer to Figure 6 Transmissive electrophoresis display device 1B and Figure 4 The main difference between the transmissive electrophoretic display device 1 and the transmissive electrophoretic display device 1B is that the multiple partition walls 110 in the transmissive electrophoretic display device 1B are inverted trapezoidal in shape in cross-sectional view, while Figure 4 The multiple partition walls 110 in the transmissive electrophoretic display device 1 are trapezoidal in shape in cross-sectional view. Specifically, Figure 4 and Figure 6 The multiple partition walls 110 in the two are all formed using photolithography. The main difference between the two lies in the different photoresist materials. Figure 4 The material of the intermediate spacer layer 11 is, for example, positive photoresist, while Figure 6 The material of the spacer layer 11 is, for example, negative photoresist.

[0041] Please refer to Figures 7 to 9 Transmissive electrophoresis display devices 1C, 1D, and 1E are respectively similar to Figures 4 to 6 The main difference between the transmissive electrophoretic display devices 1, 1A, and 1B lies in the fact that the electrophoretic layer 12C in the transmissive electrophoretic display devices 1C, 1D, and 1E includes an electrophoretic solution 120 and a plurality of black electrophoretic particles 124. The plurality of black electrophoretic particles 124 are distributed in the electrophoretic solution 120, and these particles can be charged particles with light-absorbing properties. By controlling the voltages of the plurality of first control electrodes 100 and the plurality of second control electrodes 102, the distribution of the plurality of black electrophoretic particles 124 can be controlled, thereby controlling the state (e.g., absorption state or transparency state) of each pixel region P in the transmissive electrophoretic display devices 1C, 1D, or 1E, or controlling the image displayed by the transmissive electrophoretic display devices 1C, 1D, or 1E.

[0042] The following example illustrates the phenomenon of multiple positively charged black electrophoretic particles 124. By applying a positive voltage to the first control electrode 100 and the second control electrode 102 in pixel region P, based on the principle of like charges repelling each other, the multiple black electrophoretic particles 124 will be repelled by the first control electrode 100 and the second control electrode 102 and distributed on the side of opening A away from the first control electrode 100 and the second control electrode 102 (e.g., the top of opening A), as shown below. Figures 7 to 9 The first and third pixel regions P, counting from the left, are shown in the image. Because the black electrophoretic particles 124 have light-absorbing properties, light incident on pixel region P is absorbed by the multiple black electrophoretic particles 124 distributed at the top of opening A, meaning pixel region P exhibits an absorption state or a black image. On the other hand, by applying a positive voltage to the first control electrode 100 in pixel region P and a negative voltage to the second control electrode 102 in pixel region P, based on the principle of like poles repelling and unlike poles attracting, the multiple black electrophoretic particles 124 are repelled by the first control electrode 100 and attracted by the second control electrode 102, distributing themselves near the second control electrode 102 (e.g., distributed at the bottom edge of opening A), such as... Figures 7 to 9 The second and fourth pixel regions P from the left are shown in the image. Due to the light-transmitting properties of the electrophoretic solution 120, light incident on pixel region P will pass through it, meaning that pixel region P is in a transparent state (a state where light can pass through). The portion of the second control electrode 102 not covered by the partition wall 110 can effectively attract multiple black electrophoretic particles 124, causing the multiple black electrophoretic particles 124 to be concentrated at the bottom edge of the opening A, thereby ensuring the light transmittance of pixel region P in the transparent state.

[0043] Please refer to Figures 10 to 12 The transmissive electrophoresis display devices 1F, 1G, and 1H are respectively similar to... Figures 7 to 9 The transmissive electrophoretic display devices 1C, 1D, and 1E differ primarily in that transmissive electrophoretic display devices 1F, 1G, and 1H further include multiple color filter patterns (such as color filter patterns CFR, CFG, and CFB). These multiple color filter patterns are disposed on the light-transmitting conductive substrate 13 and overlap with multiple light-transmitting areas P1 within multiple pixel areas P. For example, the color filter patterns CFR, CFG, and CFB may be red, green, and blue filter patterns, respectively, but are not limited thereto. In some embodiments, the orthographic projections of the multiple color filter patterns onto the element array substrate 10 may be greater than or equal to the multiple light-transmitting areas P1, but are not limited thereto.

[0044] The manufacturing method of transmissive electrophoretic display device 1F, transmissive electrophoretic display device 1G or transmissive electrophoretic display device 1H and Figures 7 to 9 The main difference between the manufacturing methods of transmissive electrophoretic display devices 1C, 1D, and 1E is that the manufacturing methods of transmissive electrophoretic display devices 1F, 1G, and 1H may further include forming multiple color filter patterns (such as color filter pattern CFR, color filter pattern CFG, and color filter pattern CFB) on a light-transmitting conductive substrate 13, wherein the multiple color filter patterns are respectively superimposed on multiple light-transmitting areas P1 in multiple pixel areas P.

[0045] Full-color display can be achieved by setting multiple color filter patterns. In other embodiments, although not shown, the multiple black electrophoretic particles 124 can be replaced with electrophoretic particles of other colors. For example, the multiple black electrophoretic particles 124 can be replaced with multiple white electrophoretic particles 122. Alternatively, the multiple black electrophoretic particles 124 can be replaced with multiple colored particles to provide a color display image; in this architecture, the multiple color filter patterns can be selectively omitted.

[0046] In summary, in the embodiments disclosed herein, electrophoretic particles in the electrophoretic layer can be controlled by multiple control electrodes, and a spacer layer can be formed on the element array substrate, thus eliminating the need for the dark adhesive layer used in the prior art to attach the electronic paper film to the element array substrate. Therefore, the transmissive electrophoretic display device is light-transmitting.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A transmissive electrophoretic display device, characterized in that, The transmissive electrophoretic display device comprises: a plurality of pixel regions, each of which has a light-transmitting area and a light-blocking area; and the transmissive electrophoretic display device includes: The component array substrate includes: Multiple first control electrodes are respectively disposed in multiple light-transmitting areas of the multiple pixel areas; and Multiple second control electrodes are respectively disposed in multiple non-transparent areas of the multiple pixel areas; A spacer layer is disposed on the element array substrate and has a plurality of openings that expose a plurality of light-transmitting areas respectively. In a cross-sectional view, the spacer layer includes a plurality of spacer walls, and two adjacent spacer walls are respectively disposed on opposite sides of a corresponding first control electrode among the plurality of first control electrodes. An electrophoretic layer is disposed in the plurality of openings; and A light-transmitting conductive substrate covers the spacer layer and the electrophoretic layer.

2. The transmissive electrophoresis display device according to claim 1, characterized in that, In the top view, the plurality of second control electrodes respectively surround the plurality of first control electrodes.

3. The transmissive electrophoresis display device according to claim 1, characterized in that, The plurality of first control electrodes are electrically connected to each other, and the plurality of second control electrodes are electrically independent of each other.

4. The transmissive electrophoresis display device according to claim 1, characterized in that, In the cross-sectional view, the plurality of partition walls are disposed at the intersection of the plurality of pixel regions, and one of the plurality of partition walls is disposed above two adjacent second control electrodes among the plurality of second control electrodes.

5. The transmissive electrophoresis display device according to claim 1, characterized in that, The spacer layer is made of photoresist, and in the cross-sectional view, the plurality of spacer walls are trapezoidal or inverted trapezoidal in shape.

6. The transmissive electrophoretic display device according to claim 1, characterized in that, Also includes: A light-transmitting adhesive layer, wherein the light-transmitting conductive substrate is attached to the spacer layer through the light-transmitting adhesive layer.

7. The transmissive electrophoresis display device according to claim 1, characterized in that, Also includes: Multiple sidewall electrodes are respectively disposed on multiple sidewalls of the multiple partition walls and are electrically connected to the multiple second control electrodes.

8. The transmissive electrophoresis display device according to claim 1, characterized in that, Also includes: Multiple color filter patterns are disposed on the light-transmitting conductive substrate and respectively overlap the multiple light-transmitting areas in the multiple pixel areas.

9. The transmissive electrophoresis display device according to claim 1, characterized in that, The aperture ratio of the plurality of pixel regions is 60% to 80%.

10. A method for manufacturing a transmissive electrophoretic display device, characterized in that, The transmissive electrophoretic display device has multiple pixel regions, each of which has a light-transmitting region and a light-blocking region, and the manufacturing method of the transmissive electrophoretic display device includes: A component array substrate is provided, the component array substrate including a plurality of first control electrodes and a plurality of second control electrodes, wherein the plurality of first control electrodes are respectively disposed in a plurality of light-transmitting regions in a plurality of pixel regions, and the plurality of second control electrodes are respectively disposed in a plurality of light-blocking regions in a plurality of pixel regions; A spacer layer is formed on the component array substrate by photolithography, and the spacer layer has multiple openings that expose multiple light-transmitting areas respectively. An electrophoretic layer is filled into the plurality of openings; and The spacer layer and the electrophoretic layer are covered with a light-transmitting conductive substrate.

11. The method for manufacturing the transmissive electrophoretic display device according to claim 10, characterized in that, Forming the spacer layer includes forming a plurality of spacer walls at the intersection of the plurality of pixel regions, wherein one of the plurality of spacer walls is disposed above two adjacent second control electrodes among the plurality of second control electrodes.

12. The method for manufacturing the transmissive electrophoretic display device according to claim 11, characterized in that, The spacer layer is made of photoresist, and in the cross-sectional view, the plurality of spacer walls are trapezoidal or inverted trapezoidal in shape.

13. The method for manufacturing the transmissive electrophoretic display device according to claim 10, characterized in that, The light-transparent conductive substrate is attached to the spacer layer through a light-transparent adhesive layer.

14. The method for manufacturing the transmissive electrophoretic display device according to claim 10, characterized in that, Also includes: Multiple sidewall electrodes are formed on multiple sidewalls of multiple partition walls in the spacer layer, and the multiple sidewall electrodes are electrically connected to the multiple second control electrodes.

15. The method for manufacturing the transmissive electrophoretic display device according to claim 10, characterized in that, Also includes: Multiple color filter patterns are formed on the light-transmitting conductive substrate, and the multiple color filter patterns are respectively superimposed on multiple light-transmitting areas in the multiple pixel areas.

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