# US 12,216,375 B2 · Electronic paper display module > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,216,375 B2 - Document ID: US12216375B2 - Status: Granted - Kind: B2 - Application number: 17/446,121 - Filed: 2021-08-26 - Published: 2022-04-21 - Granted: 2025-02-04 - Earliest claimed: 2020-10-21 - Assignees: Chengdu Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Applicants: Chengdu BOE Optoelectronics Technology Co., Ltd.; BOE Technology Group Co., Ltd. - Inventors: Hao Luo; Yin Deng; Bo Wu; Dongmei Wei - Web page: https://patentgrep.com/patent/US12216375B2 ## CPC - G02F 1/1676: Electrodes - G02F 1/16766: for active matrices - G02F 1/167: by electrophoresis - G02F 1/16755: Substrates - 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 The present disclosure provides an electronic paper display module, including an array substrate and an electronic paper film arranged opposite to each other. The electronic paper film includes a common electrode, the array substrate includes a display region and a peripheral region, and a common electrode lead is located at the peripheral region. An orthogonal projection of the electronic paper film onto the array substrate at least covers the display region, and the common electrode lead is provided with a hollowed-out region. ## Claims ### Claim 1 An electronic paper display module, comprising an array substrate and an electronic paper film arranged opposite to each other, wherein the electronic paper film comprises a common electrode; the array substrate comprises a display region and a peripheral region, and a common electrode lead is located at the peripheral region; and an orthogonal projection of the electronic paper film onto the array substrate at least covers the display region, and the common electrode lead is provided with a hollowed-out region; wherein the array substrate further comprises a base substrate, the base substrate comprises a buffer layer and an insulation layer laminated one on another, the common electrode lead is located at a side of the insulation layer away from the buffer layer, and the insulation layer is arranged at a side of the common electrode lead away from the electronic paper film; the buffer layer is provided with a concave-convex region at a side close to the insulation layer, each concave is depressed in a direction away from the common electrode lead, and each convex is protruded in a direction close to the common electrode lead; and at least a part of the insulation layer and at least a part of the common electrode lead are deformed along with the concave-convex region of the buffer layer so as to form the hollowed-out region of the common electrode lead. ### Claim 2 (depends on 1) The electronic paper display module according to claim 1, wherein the common electrode lead is hollowed out at a part of the hollowed-out region. ### Claim 3 (depends on 2) The electronic paper display module according to claim 2, wherein the common electrode lead is a grid-shaped lead at the hollowed-out region. ### Claim 4 (depends on 1) The electronic paper display module according to claim 1, wherein the orthogonal projection of the electronic paper film onto the array substrate only covers the display region. ### Claim 5 (depends on 4) The electronic paper display module according to claim 4, wherein the base substrate is arranged at a side of the common electrode lead away from the electronic paper film; a minimum distance between an edge line of the orthogonal projection of the electronic paper film onto the base substrate and an edge line of an orthogonal projection of the hollowed-out region onto the base substrate is a first predetermined spacing; and the first predetermined spacing is greater than or equal to 10 microns and less than or equal to 200 microns. ### Claim 6 (depends on 5) The electronic paper display module according to claim 5, wherein the peripheral region comprises a first peripheral region and a second peripheral region, and the first peripheral region, the display region and the second peripheral region are arranged in a first direction; the common electrode lead is arranged at the first peripheral region, and a maximum distance between a side of the edge line of the orthogonal projection of the electronic paper film onto the base substrate closest to the first peripheral region and the edge line of the orthogonal projection of the hollowed-out region onto the base substrate in the first direction is a first predetermined distance; or the common electrode lead is arranged at the second peripheral region, and a maximum distance between a side of the edge line of the orthogonal projection of the electronic paper film onto the base substrate closest to the second peripheral region and the edge line of the orthogonal projection of the hollowed-out region onto the base substrate in the first direction is a second predetermined distance; or the common electrode lead comprises a first common electrode lead and a second common electrode lead, the first common electrode lead is provided with a first hollowed-out region, the second common electrode lead is provided with a second hollowed-out region, the first common electrode lead is arranged at the first peripheral region, the second common electrode lead is arranged at the second peripheral region, a maximum distance between the side of the edge line of the orthogonal projection of the electronic paper film onto the base substrate closest to the first peripheral region and an edge line of an orthogonal projection of the first hollowed-out region onto the base substrate in the first direction is the first predetermined distance, and a maximum distance between the side of the edge line of the orthogonal projection of the electronic paper film onto the base substrate closest to the second peripheral region and an edge line of an orthogonal projection of the second hollowed-out region onto the base substrate in the first direction is the second predetermined distance, wherein the first predetermined distance is greater than or equal to 200 microns and less than or equal to 500 microns, and the second predetermined distance is greater than or equal to 200 microns and less than or equal to 500 microns. ### Claim 7 (depends on 1) The electronic paper display module according to claim 1, wherein the orthogonal projection of the electronic paper film onto the array substrate covers the display region, and completely covers a region where the common electrode lead is located, and the common electrode lead is a grid-shaped lead. ### Claim 8 (depends on 7) The electronic paper display module according to claim 7, wherein the base substrate is arranged at a side of the common electrode lead away from the electronic paper film; the peripheral region comprises a first peripheral region and a second peripheral region, and the first peripheral region, the display region, and the second peripheral region are arranged in a first direction; the common electrode lead is arranged at the first peripheral region, and a minimum distance between an edge line of an orthogonal projection of the electronic paper film onto the base substrate and an orthogonal projection of the common electrode lead onto the base substrate in the first direction is a third predetermined distance; or the common electrode lead is arranged at the second peripheral region, and a minimum distance between the edge line of the orthogonal projection of the electronic paper film onto the base substrate and the orthogonal projection of the common electrode lead onto the base substrate in the first direction is a fourth predetermined distance; or the common electrode lead comprises a first common electrode lead and a second common electrode lead, the first common electrode lead is arranged at the first peripheral region, the second common electrode lead is arranged at the second peripheral region, a minimum distance between the edge line of the orthogonal projection of the electronic paper film onto the base substrate and an orthogonal projection of the first common electrode lead onto the base substrate in the first direction is the third predetermined distance, and a minimum distance between the edge line of the orthogonal projection of the electronic paper film onto the base substrate and an orthogonal projection of the second common electrode lead onto the base substrate in the first direction is the fourth predetermined distance; wherein the third predetermined distance is greater than or equal to 20 microns and less than or equal to 200 microns, and the fourth predetermined distance is greater than or equal to 20 microns and less than or equal to 200 microns. ### Claim 9 (depends on 1) The electronic paper display module according to claim 1, wherein the orthogonal projection of the electronic paper film onto the array substrate covers the display region, and partially covers a region where the common electrode lead is located. ### Claim 10 (depends on 9) The electronic paper display module according to claim 9, wherein a width of the hollowed-out region in the first direction is greater than or equal to 400 microns and less than or equal to 800 microns; and the peripheral region comprises a first peripheral region and a second peripheral region, the common electrode lead is arranged at the first peripheral region and/or the second peripheral region, and the first peripheral region, the display region and the second peripheral region are arranged in the first direction. ### Claim 11 (depends on 1) The electronic paper display module according to claim 1, wherein an edge of the electronic paper film close to the array substrate is arc-shaped. ### Claim 12 (depends on 1) The electronic paper display module according to claim 1, wherein the common electrode lead is provided with a wavy or serrated edge. ### Claim 13 (depends on 1) The electronic paper display module according to claim 1, wherein the base substrate comprises a base and the base is arranged at a side of the insulation layer away from the common electrode lead; the insulation layer is provided with a plurality of stress release grooves, and an orthogonal projection of each stress release groove onto the base is located at a periphery of an orthogonal projection of the common electrode lead onto the base; and the orthogonal projection of each stress release groove onto the base is rectangular, and each stress release groove is depressed in a direction away from the common electrode lead.