# US 2025/0098313 A1 · Electrophoresis display with tapered micro partition structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0098313 A1 - Document ID: US20250098313A1 - Status: Published application - Kind: A1 - Application number: 18/885,253 - Filed: 2024-09-13 - Published: 2025-03-20 - Earliest claimed: 2023-09-14 - Assignees: Superc-Touch Corporation - Applicants: Superc-Touch Corporation - Inventors: Hsiang-Yu LEE; Shang CHIN; Ping-Tsun LIN; Chia-Cheng LEI; Kun-Yu CHEN - Web page: https://patentgrep.com/patent/US20250098313A1 ## CPC - H10D 86/60: wherein the TFTs are in active matrices - G02F 1/136222: {Colour filters incorporated in the active matrix substrate} - G02F 1/167: by electrophoresis - G02F 1/16766: for active matrices - G02F 1/1681: having two or more microcells partitioned by walls, e.g. of microcup type - H10D 86/411: {characterised by materials, geometry or structure of the substrates} - H10D 86/431: {having different compositions, shapes, layouts or thicknesses of gate insulators in different TFTs} - H10D 86/441: {Interconnections, e.g. scanning lines} - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract An electrophoresis display with tapered micro partition structure includes a control substrate having a first face and a second face, a driving circuit layer, a control electrode layer, and an electrophoresis layer. The driving circuit layer, the control electrode layer, and the electrophoresis layer are sequentially arranged on the second face. The electrophoresis layer includes a micro partition structure arranged on the control substrate and made from polymer material. The micro partition structure includes a plurality of partition walls to define chambers for accommodating a colloidal solution. The sectional width of the partition wall decreases with a layer number of a polymer stacks forming the partition wall increases. ## Claims ### Claim 1 An electrophoresis display with a tapered micro-partition structure, comprising: a control substrate, comprising a first face and a second face; a driving circuit layer, arranged on the second face of the control substrate and comprising a plurality of thin film transistors, a plurality of gate lines, and a plurality of data lines, at least one of the gate lines electrically connected to gates of the thin film transistors, at least one of the data lines electrically connected to drains or sources of the thin film transistors; a control electrode layer, arranged on a surface of the driving circuit layer away from the control substrate and comprising a plurality of control electrodes, at least one of the control electrodes electrically connected to the source or the drain of one of the thin film transistors; a micro-partition structure, disposed on the control substrate and made of polymer materials, the micro-partition structures comprising a plurality of partition walls to define a plurality of chambers configured to fill with the electrophoresis material, the colloidal solution comprising at least one kind of charged color particles; at least one of a section width of the partition wall decreases with each layer as the number of layers of a plurality of polymer material stacks produced; and an opposite substrate, disposed on a side of the micro-partition structure away from the control substrate. ### Claim 2 (depends on 1) The electrophoresis display with a tapered micro-partition structure of claim 1, wherein, the partition wall is rectangular and substantially corresponds to pixels of the electrophoretic display. ### Claim 3 (depends on 1) The electrophoresis display with a tapered micro-partition structure of claim 1, further comprising a common electrode layer being disposed on a side of the opposite substrate. ### Claim 4 (depends on 1) The electrophoresis display with a tapered micro-partition structure of claim 1, further comprising: at least two kinds of charged color particles, filled in the chamber. ### Claim 5 (depends on 1) The electrophoresis display with a tapered micro-partition structure of claim 1, further comprising: a color filter layer disposed at a bottom of the chamber, and the colloidal solution comprising charged black particles and/or charged white particles. ### Claim 6 (depends on 1) The electrophoresis display with a tapered micro-partition structure of claim 1, wherein, along a direction looking from the first face of the control substrate into a display region of the electrophoretic display, an aperture ratio of the control substrate of the electrophoretic display is not less than 70%. ### Claim 7 (depends on 1) The electrophoresis display with a tapered micro-partition structure of claim 1, wherein, the colloidal solution is filled in the micro-partition structure under a vacuum environmental condition. ### Claim 8 (depends on 1) The electrophoresis display with a tapered micro-partition structure of claim 1, wherein, the micro-partition wall comprises: a plurality of polymer material stacks, wherein, a width reduction of each layer of the polymer material stack is less than 5 μm. ### Claim 9 (depends on 1) The electrophoresis display with a tapered micro-partition structure of claim 1, wherein, the partition walls overlap part of the data lines and/or part of the gate lines in a view from a vertical projection direction. ### Claim 10 (depends on 1) The electrophoresis display with a tapered micro-partition structure of claim 1, wherein, a height of the partition wall of the micro-partition structure is less than 25 μm. ### Claim 11 (depends on 1) The electrophoresis display with a tapered micro-partition structure of claim 1, wherein, the polymer material is a photoresist material, a flat layer material, a resin, or an acrylic material. ### Claim 12 (depends on 1) The electrophoresis display with a tapered micro-partition structure of claim 1, wherein, an average cross-sectional width of the partition wall of the micro-partition structure is not more than 10 μm. ### Claim 13 (depends on 1) The electrophoresis display with a tapered micro-partition structure of claim 1, wherein, in a view from a projection direction of a viewing face of the partition walls, an overlapping area of the partition wall with one of the control electrodes is less than 50% of an area of the control electrode. ### Claim 14 (depends on 1) The electrophoresis display with a tapered micro-partition structure of claim 1, wherein, a height of the partition wall of the micro-partition structure is more than 5 μm. ### Claim 15 (depends on 1) The electrophoresis display with a tapered micro-partition structure of claim 1, wherein, a filling rate of the colloidal solution in the chambers is equal to or more than 70%. ### Claim 16 (depends on 1) The electrophoresis display with a tapered micro-partition structure of claim 1, wherein, a filling rate of the colloidal solution in the chambers is equal to or more than 90%. ### Claim 17 (depends on 1) The electrophoresis display with a tapered micro-partition structure of claim 1, wherein, at least two of the partition walls have a crevice between each other, an area of the crevice is not more than 50% of an area of the partition wall, or a length of the crevice is not more than 50% of a length of the partition wall. ### Claim 18 (depends on 11) The electrophoresis display with a tapered micro-partition structure of claim 11, wherein, the micro-partition is made by repeating more than one photoresist coating, exposing and developing. ### Claim 19 An electrophoresis display with a tapered micro-partition structure, comprising: a control substrate, comprising a first face and a second face; a driving circuit layer, arranged on the second face of the control substrate and comprising a plurality of thin film transistors, a plurality of gate lines, and a plurality of data lines, at least one of the gate lines electrically connected to gates of a plurality of the thin film transistors, at least one of the data lines electrically connected to drains or sources of the thin film transistors; a control electrode layer, arranged on a surface of the driving circuit layer away from the control substrate and comprising a plurality of control electrodes, at least one of the control electrodes electrically connected to the source or the drain of one of the thin film transistors; an opposite substrate, arranged on a side away from the control substrate; and a micro-partition structure, disposed on the opposite substrate and made of polymer materials, the micro-partition structures comprising a plurality of partition walls to define a plurality of chambers configured to fill with the electrophoresis material, the colloidal solution comprising at least one kind of charged color particles; wherein, at least one of a section width of the micro-partition wall decreases with each layer as the number of layers of a plurality of polymer material stacks is produced. ### Claim 20 (depends on 19) The electrophoresis display with a tapered micro-partition structure of claim 19, wherein, the colloidal solution is filled in the micro-partition structure under a vacuum environmental condition. ### Claim 21 (depends on 19) The electrophoresis display with a tapered micro-partition structure of claim 19, wherein, the micro-partition wall comprises: a plurality of polymer material stacks, wherein, a width reduction of each layer of the polymer material stack is less than 5 μm. ### Claim 22 (depends on 19) The electrophoresis display with a tapered micro-partition structure of claim 19, wherein, the partition walls overlap part of the data lines and/or part of the gate lines in a view from a vertical projection direction. ### Claim 23 (depends on 19) The electrophoresis display with a tapered micro-partition structure of claim 19, further comprising: a color filter layer, arranged between the opposite substrate and the control electrode layer; a common electrode layer, disposed on a side of the opposite substrate; wherein, the micro-partition structure is arranged between the common electrode layer and the control electrode layer, the colloidal solution comprising charged black particles and/or charged white particles. ### Claim 24 (depends on 19) The electrophoresis display with a tapered micro-partition structure of claim 19, further comprising: a common electrode layer, disposed on a side of the opposite substrate; wherein, the micro-partition structure is arranged between the common electrode layer and the control electrode layer, and the colloidal solution comprising at least two kinds of charged color particles. ### Claim 25 (depends on 19) The electrophoresis display with a tapered micro-partition structure of claim 19, further comprising: a micro tenon, disposed on the control electrode layer and extended toward the chamber. ### Claim 26 (depends on 19) The electrophoresis display with a tapered micro-partition structure of claim 19, further comprising: a color filter layer disposed on the control electrode layer, and the colloidal solution comprising charged black particles and/or charged white particles. ### Claim 27 (depends on 26) The electrophoresis display with a tapered micro-partition structure of claim 26, further comprising: a micro tenon, disposed on the color filter layer and extended toward the chamber. ### Claim 28 (depends on 19) The electrophoresis display with a tapered micro-partition structure of claim 19, further comprising: a common electrode layer, disposed on a side of the opposite substrate; and a color filter layer, disposed on the common electrode layer, and the colloidal solution comprising charged black particles and/or charged white particles. ### Claim 29 (depends on 19) The electrophoresis display with a tapered micro-partition structure of claim 19, wherein, a height of the partition wall of the micro-partition structure is less than 25 μm. ### Claim 30 (depends on 19) The electrophoresis display with a tapered micro-partition structure of claim 19, wherein, the polymer material is a photoresist material, a flat layer material, a resin, or an acrylic material. ### Claim 31 (depends on 19) The electrophoresis display with a tapered micro-partition structure of claim 19, wherein, an average cross-sectional width of the partition wall of the micro-partition structure is not more than 10 μm. ### Claim 32 (depends on 19) The electrophoresis display with a tapered micro-partition structure of claim 19, wherein, in a view from a projection direction of a viewing face of the partition walls, an overlapping area of the partition wall with one of the control electrodes is less than 50% of an area of the control electrode. ### Claim 33 (depends on 19) The electrophoresis display with a tapered micro-partition structure of claim 19, wherein, a height of the partition wall of the micro-partition structure is more than 5 μm. ### Claim 34 (depends on 18) The electrophoresis display with a tapered micro-partition structure of claim 18, wherein, a filling rate of the colloidal solution in the chambers is equal to or more than 70%. ### Claim 35 (depends on 19) The electrophoresis display with a tapered micro-partition structure of claim 19, wherein, a filling rate of the colloidal solution in the chambers is equal to or more than 90%. ### Claim 36 (depends on 19) The electrophoresis display with a tapered micro-partition structure of claim 19, wherein, at least two of the partition walls have a crevice between each other, an area of the crevice is not more than 50% of an area of the partition wall, or a length of the crevice is not more than 50% of a length of the partition wall. ### Claim 37 (depends on 30) The electrophoresis display with a tapered micro-partition structure of claim 30, wherein, the micro-partition is made by repeating more than one photoresist coating, exposing and developing.