# US 2026/0111091 A1 · Reflective display > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0111091 A1 - Document ID: US20260111091A1 - Status: Published application - Kind: A1 - Application number: 19/412,614 - Filed: 2025-12-08 - Published: 2026-04-23 - Earliest claimed: 2023-07-03 - Assignees: Wacom Co., Ltd. - Applicants: Wacom Co., Ltd. - Inventors: Hiroshi MIZUHASHI; Joo Hoon LEE; Fumitaka GOTO - Web page: https://patentgrep.com/patent/US20260111091A1 ## CPC - G06F 3/046: by electromagnetic means - G02F 1/1333: Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) - G02F 1/1675: Constructional details - G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means - G06F 3/04164: {Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads} - G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer} - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - H10D 30/6746: {Amorphous silicon} - H10D 86/40: characterised by multiple TFTs - H10D 86/441: {Interconnections, e.g. scanning lines} - H10D 86/60: wherein the TFTs are in active matrices - G02F 1/13338: {Input devices, e.g. touch panels} - G02F 1/167: by electrophoresis - G06F 3/0412: {Digitisers structurally integrated in a display} - G06F 2203/04102: Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper - G06F 2203/04106: Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - 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 - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES ## Abstract A reflective display includes a cover layer that has an operation surface on which a position indicator including an inductor is operated, a reflective display layer that includes a plurality of reflective elements each of which reflects, with a set gradation, light incident from the cover layer, a backplane that is provided at a position farther than the reflective display layer as viewed from the operation surface, and a common electrode layer that includes a common electrode provided between the cover layer and the reflective display layer. The backplane has, in a display area, a plurality of pixel electrodes, a plurality of data lines, and a plurality of first electromagnetic induction sensor electrodes. The plurality of first electromagnetic induction sensor electrodes are used for detecting the position of the position indicator in the operation surface by generating electromagnetic induction action with the inductor. ## Claims ### Claim 1 A reflective display, comprising: a cover layer that has an operation surface on which a position indicator including an inductor is operated; a reflective display layer that includes a plurality of reflective elements each of which reflects, with a set gradation, light incident from the cover layer; a backplane that is provided at a position farther than the reflective display layer as viewed from the operation surface; and a common electrode layer that includes a common electrode provided between the cover layer and the reflective display layer, wherein the backplane has, in a display area overlapping the plurality of reflective elements in plan view, a plurality of pixel electrodes arranged in a matrix along a first direction and a second direction intersecting the first direction, a plurality of data lines each extending along the first direction, and a plurality of first electromagnetic induction sensor electrodes each extending along the first direction, and the plurality of first electromagnetic induction sensor electrodes are used for detecting a position of the position indicator in the operation surface by generating electromagnetic induction action with the inductor. ### Claim 2 (depends on 1) The reflective display according to claim 1, wherein the common electrode layer has, in the display area, a plurality of second electromagnetic induction sensor electrodes each extending along the second direction, and the plurality of second electromagnetic induction sensor electrodes are used for detecting the position of the position indicator in the operation surface by generating electromagnetic induction action with the inductor. ### Claim 3 (depends on 1) The reflective display according to claim 1, comprising: a touch sensor that is provided between the cover layer and the common electrode layer, wherein the touch sensor has, in the display area, a plurality of second electromagnetic induction sensor electrodes each extending along the second direction. ### Claim 4 (depends on 1) The reflective display according to claim 1, wherein each of the plurality of first electromagnetic induction sensor electrodes generates electromagnetic induction action with the inductor when an electromotive force corresponding to a change in magnetic flux generated by a change in current flowing in the inductor is generated. ### Claim 5 (depends on 1) The reflective display according to claim 1, wherein the backplane has, in the display area, a plurality of gate lines each extending along the second direction, and a plurality of second electromagnetic induction sensor electrodes each extending along the second direction, and the plurality of second electromagnetic induction sensor electrodes are used for detecting the position of the position indicator in the operation surface by generating electromagnetic induction action with the inductor. ### Claim 6 (depends on 5) The reflective display according to claim 5, wherein the backplane has, in the display area, a plurality of pixel transistors provided to correspond to the respective pixel electrodes, and each of the plurality of pixel transistors has a control electrode connected to any one of the plurality of gate lines, one controlled electrode connected to any one of the plurality of data lines, and another controlled electrode connected to a corresponding one of the pixel electrodes. ### Claim 7 (depends on 6) The reflective display according to claim 6, wherein the backplane has, in the display area, a plurality of storage capacitors provided to correspond to the respective pixel electrodes, and each of the plurality of storage capacitors has one electrode connected to a corresponding one of the pixel electrodes. ### Claim 8 (depends on 7) The reflective display according to claim 7, wherein each of the plurality of first electromagnetic induction sensor electrodes extends between the data line and the storage capacitor that are adjacent to each other in the second direction. ### Claim 9 (depends on 8) The reflective display according to claim 8, wherein the number of the plurality of first electromagnetic induction sensor electrodes is smaller than the number of the data lines. ### Claim 10 (depends on 7) The reflective display according to claim 7, wherein the backplane has an insulating film that covers the plurality of data lines, and a plurality of conductive films that are each provided between a corresponding one of the plurality of pixel electrodes and the insulating film, and each of the storage capacitors has another electrode including a corresponding one of the conductive films. ### Claim 11 (depends on 5) The reflective display according to claim 5, wherein corresponding ones of the plurality of second electromagnetic induction sensor electrodes are connected to each other by a base electrode provided at end portions thereof. ### Claim 12 (depends on 11) The reflective display according to claim 11, wherein the base electrode is arranged in an area outside the display area in plan view. ### Claim 13 (depends on 5) The reflective display according to claim 5, wherein each of the plurality of second electromagnetic induction sensor electrodes generates electromagnetic induction action with the inductor when an alternating current being supplied from a sensor controller and flowing therethrough causes a change in magnetic flux. ### Claim 14 (depends on 5) The reflective display according to claim 5, wherein each of the plurality of first electromagnetic induction sensor electrodes generates electromagnetic induction action with the inductor when an alternating current being supplied from a sensor controller and flowing therethrough causes a change in magnetic flux. ### Claim 15 (depends on 14) The reflective display according to claim 14, wherein each of the plurality of second electromagnetic induction sensor electrodes generates electromagnetic induction action with the inductor when an electromotive force corresponding to a change in magnetic flux generated by a change in current flowing in the inductor is generated. ### Claim 16 (depends on 5) The reflective display according to claim 5, wherein either a first end or a second end of each of the plurality of gate lines is connected to a routing wire such that a connection of the first end and a connection of the second end are alternately made when viewed in the first direction. ### Claim 17 (depends on 5) The reflective display according to claim 5, wherein each of the plurality of gate lines is connected to a routing wire in the display area. ### Claim 18 A reflective display, comprising: a cover layer that has an operation surface on which a position indicator including an inductor is operated; a reflective display layer that includes a plurality of reflective elements each of which reflects, with a set gradation, light incident from the cover layer; a backplane that is provided at a position farther than the reflective display layer as viewed from the operation surface; and a common electrode that is provided between the cover layer and the reflective display layer, wherein the backplane has, in a display area overlapping the plurality of reflective elements in plan view, a plurality of pixel electrodes arranged in a matrix along a first direction and a second direction intersecting the first direction, a plurality of gate lines each extending along the second direction, and a plurality of second electromagnetic induction sensor electrodes each extending along the second direction, and the plurality of second electromagnetic induction sensor electrodes are used for detecting a position of the position indicator in the operation surface by generating electromagnetic induction action with the inductor. ### Claim 19 A reflective display, comprising: a cover layer that has an operation surface on which a position indicator including an inductor is operated; a reflective display layer that includes a plurality of reflective elements each of which reflects, with a set gradation, light incident from the cover layer; a backplane that is provided at a position farther than the reflective display layer as viewed from the operation surface; and a common electrode that is provided between the cover layer and the reflective display layer, wherein the backplane has, in a display area overlapping the plurality of reflective elements in plan view, a plurality of pixel electrodes arranged in a matrix along a first direction and a second direction intersecting the first direction and a plurality of linear conductors each extending along the first direction, and the plurality of linear conductors are used, in a time-division manner, as either a plurality of data lines used for supplying data signals to the pixel electrodes or a plurality of first electromagnetic induction sensor electrodes used for detecting a position of the position indicator in the operation surface by generating electromagnetic induction action with the inductor.