# US 12,222,625 B2 · Display device and fabrication method of the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,222,625 B2 - Document ID: US12222625B2 - Status: Granted - Kind: B2 - Application number: 17/581,862 - Filed: 2022-01-22 - Published: 2022-11-10 - Granted: 2025-02-11 - Earliest claimed: 2021-05-06 - Assignees: E Ink Holdings Inc. - Applicants: E Ink Holdings Inc. - Inventors: Chia-Chun Yeh; Yi-Sheng Lin; Chen-Chu Tsai - Web page: https://patentgrep.com/patent/US12222625B2 ## CPC - G02F 1/167: by electrophoresis - B32B 27/281: {comprising polyimides} - B32B 37/12: characterised by using adhesives - G02F 1/1679: Gaskets; Spacers; Sealing of cells; Filling or closing of cells - B32B 7/02: Physical, chemical or physicochemical properties - B32B 27/06: as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08)} - B32B 37/16: with all layers existing as coherent layers before laminating - B32B 38/145: {Printing} - B32B 2250/05: 5 or more layers - B32B 2307/202: Conductive - B32B 2307/546: Flexural strength; Flexion stiffness - B32B 2307/7246: Water vapor barrier - B32B 2307/7375: Linear, e.g. length, distance or width - B32B 2457/20: Displays, e.g. liquid crystal displays, plasma displays - G02F 2202/28: Adhesive materials or arrangements - 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 - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM ## Abstract A display device includes a driving substrate, an electronic ink layer, and a conductive barrier layer. The electronic ink layer is located on the driving substrate. The conductive barrier layer is located on the electronic ink layer, the conductive barrier layer includes a conductive layer and a base layer, the conductive layer is located between the base layer and the electronic ink layer, and the conductive layer is separated from the electronic ink layer. ## Claims ### Claim 1 A display device, comprising: a driving substrate; an electronic ink layer located on the driving substrate; and a conductive barrier layer located on the electronic ink layer, wherein the conductive barrier layer comprises a conductive layer and a base layer, the conductive layer is located between the base layer and the electronic ink layer, and the conductive layer is separated from the electronic ink layer. ### Claim 2 (depends on 1) The display device of claim 1, wherein the conductive barrier layer further comprises a vapor barrier layer located between the conductive layer and the base layer. ### Claim 3 (depends on 1) The display device of claim 1, wherein an area of an orthogonal projection of the conductive barrier layer on the driving substrate is greater than an area of the orthogonal projection of the electronic ink layer on the driving substrate. ### Claim 4 (depends on 1) The display device of claim 1, wherein the base layer comprises colorless polyimide (CPI). ### Claim 5 (depends on 1) The display device of claim 1, further comprising: an adhesive layer located between the electronic ink layer and the conductive barrier layer. ### Claim 6 (depends on 1) The display device of claim 1, further comprising: a sealant located between the driving substrate and the conductive barrier layer, and the sealant surrounds the electronic ink layer. ### Claim 7 (depends on 6) The display device of claim 6, wherein a stiffness of the sealant is smaller than 500 MPa. ### Claim 8 (depends on 6) The display device of claim 6, wherein a water vapor transmission rate (WVTR) is smaller than 12 g/m2/day. ### Claim 9 (depends on 6) The display device of claim 6, wherein a viscosity of the sealant is smaller than 2000 Pa·s. ### Claim 10 (depends on 1) The display device of claim 1, further comprising: a functional thin film disposed on the conductive barrier layer, and a width of the functional thin film is smaller than or equal to a width of the conductive barrier layer; and a housing surrounding the driving substrate, the electronic ink layer, the conductive barrier layer, and the functional thin film, wherein the housing extends onto a surface of the functional thin film facing away from the conductive barrier layer. ### Claim 11 (depends on 10) The display device of claim 10, wherein the functional thin film comprises a first cover structure and a second cover structure, the first cover structure is located between the second cover structure and the conductive barrier layer, and a width of the second cover structure is smaller than a width of the first cover structure. ### Claim 12 (depends on 1) The display device of claim 1, further comprising: a functional thin film disposed on the conductive barrier layer, a width of the functional thin film is greater than a width of the conductive barrier layer, and a difference between the width of the functional thin film and the width of the conductive barrier layer is greater 3 mm. ### Claim 13 (depends on 12) The display device of claim 12, wherein the functional thin film comprises a first cover structure and a second cover structure, the first cover structure is located between the second cover structure and the conductive barrier layer, and a width of the second cover structure is greater than a width of the first cover structure, and the display device further comprises: a housing surrounding the driving substrate, the electronic ink layer, the conductive barrier layer, and the first cover structure, wherein the housing is located below the second cover structure. ### Claim 14 (depends on 12) The display device of claim 12, wherein the functional thin film comprises a first cover structure and a second cover structure, the first cover structure is located between the second cover structure and the conductive barrier layer, and the display device further comprises: a housing surrounding the driving substrate, the electronic ink layer, the conductive barrier layer, and the housing is located below the first cover structure. ### Claim 15 A fabrication method of the display device, comprising: forming an electronic ink layer on a driving substrate; providing a conductive barrier layer, wherein the conductive barrier layer comprises a conductive layer located on the base layer; and adhering the electronic ink layer formed on the driving substrate and the conductive layer through an adhesive layer, wherein the adhesive layer is located between the electronic ink layer and the conductive barrier layer. ### Claim 16 (depends on 15) The fabrication method of the display device of claim 15, wherein providing the conductive barrier layer further comprises disposing a vapor barrier layer located between the base layer and the conductive layer. ### Claim 17 (depends on 15) The fabrication method of the display device of claim 15, further comprising: disposing a sealant between the driving substrate and the conductive barrier layer, and the sealant surrounds the electronic ink layer. ### Claim 18 (depends on 15) The fabrication method of the display device of claim 15, further comprising: disposing a functional thin film on the driving substrate or the conductive barrier layer. ### Claim 19 (depends on 18) The fabrication method of the display device of claim 18, wherein a width of the functional thin film is smaller than or equal to a width of the conductive barrier layer, and the fabrication method of the display device further comprises: disposing a housing surrounding the driving substrate, the electronic ink layer, the conductive barrier layer, and the functional thin film such that the housing extends onto a surface of the functional thin film facing away from the conductive barrier layer. ### Claim 20 (depends on 18) The fabrication method of the display device of claim 18, wherein a width of the functional thin film is greater than a width of the conductive barrier layer, and a difference between the width of the functional thin film and the width of the conductive barrier layer is greater 3 mm, and the fabrication method of the display device further comprises: disposing a housing surrounding the driving substrate, the electronic ink layer, and the conductive barrier layer, wherein the housing is located below the functional thin film.