# US 10,485,100 B2 · Circuit board and display system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,485,100 B2 - Document ID: US10485100B2 - Status: Granted - Kind: B2 - Application number: 15/275,612 - Filed: 2016-09-26 - Published: 2017-03-30 - Granted: 2019-11-19 - Earliest claimed: 2015-09-30 - Assignees: Semiconductor Energy Laboratory Co., Ltd. - Applicants: Semiconductor Energy Laboratory Co., Ltd. - Inventors: Naoyuki Senda; Yuichi Yanagisawa - Web page: https://patentgrep.com/patent/US10485100B2 ## CPC - H05K 1/028: {Bending or folding regions of flexible printed circuits (H05K1/0283 takes precedence)} - G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable} - H05K 1/0268: {for electrical inspection or testing} - G06F 3/147: using display panels - G09G 2354/00: Aspects of interface with display user - G09G 2380/02: Flexible displays - H01F 2007/068: {using printed circuit coils} - H05K 1/05: Insulated {conductive substrates, e.g. insulated} metal substrate - H05K 1/165: {incorporating printed inductors} - H05K 2201/0116: Porous, e.g. foam - H05K 2201/0133: Elastomeric or compliant polymer - H05K 2201/0162: Silicon containing polymer, e.g. silicone - H05K 2201/057: Shape retainable - H05K 2201/086: for inductive purposes, e.g. printed inductor with ferrite core - H05K 2201/10128: Display - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract To provide a circuit board in which a curvature of a display surface can be controlled, or to provide a highly portable circuit board. A circuit board includes a substrate with flexibility and a curvature control mechanism. The curvature control mechanism includes a first electromagnet and a second electromagnet provided over a first surface of the substrate, an insulating film provided over the first and second electromagnets, and wirings electrically connected to the first and second electromagnets. ## Claims ### Claim 1 A display system comprising: a display device comprising: a display portion; and a curvature control mechanism comprising a plurality of electromagnets provided along an end of the display portion, the plurality of electromagnets comprising a first electromagnet, a second electromagnet, and a third electromagnet; a distance data detection sensor configured to detect a distance data between a user and the distance data detection sensor; and a curvature control circuit configured to control a curvature of the display device on a basis of the distance data by controlling operation of the curvature control mechanism, wherein: the first electromagnet and the second electromagnet are in a first row and are directly adjacent to each other, a first axis passes through a midpoint of the first electromagnet and a midpoint of the second electromagnet, the first electromagnet is electrically connected to a first wiring, the second electromagnet is electrically connected to a second wiring that is different from the first wiring so that a direction of current flowing in the second electromagnet is able to be changed independently of the first electromagnet, the third electromagnet is in a second row, a center axis of the third electromagnet passes through a midpoint of a distance between the first electromagnet and the second electromagnet, and the center axis is orthogonal to the first axis. ### Claim 2 (depends on 1) The display system according to claim 1, wherein the display portion and the curvature control mechanism overlap with each other. ### Claim 3 (depends on 1) The display system according to claim 1, wherein the display portion and the curvature control mechanism do not overlap with each other. ### Claim 4 (depends on 1) The display system according to claim 1, wherein the second electromagnet is configured to be supplied with a current in a same direction as a current flowing in the first electromagnet in a first state and a current in an opposite direction to a current flowing in the first electromagnet in a second state. ### Claim 5 (depends on 1) The display system according to claim 1, wherein the display portion and the curvature control mechanism are provided over one surface of a substrate. ### Claim 6 (depends on 1) The display system according to claim 1, wherein the display device is configured to be changed in shape in accordance with magnetic attraction or magnetic repulsion between the first electromagnet and the second electromagnet. ### Claim 7 (depends on 1) The display system according to claim 1, further comprising a display control circuit configured to control an image to be displayed on the display portion in accordance with the distance data. ### Claim 8 (depends on 1) The display system according to claim 1, wherein the third electromagnet is electrically connected to the first wiring. ### Claim 9 (depends on 1) The display system according to claim 1, further comprising a housing, wherein: the housing comprises the curvature control circuit and a rod, and the display device is configured to be rolled up with the rod. ### Claim 10 A display system comprising: a display device comprising: a display portion; and a curvature control mechanism comprising a plurality of electromagnets provided along an end of the display portion, the plurality of electromagnets comprising a first electromagnet, a second electromagnet, and a third electromagnet; a distance data detection mechanism comprising: a movable portion; and a distance data detection sensor provided over the movable portion and configured to detect a distance data between a user and the distance data detection sensor; a positional data detection sensor configured to detect a positional data of the user; and a control circuit comprising: a curvature control circuit configured to control a curvature of the display device on a basis of the distance data by controlling operation of the curvature control mechanism; and a movable portion control circuit configured to control the movable portion on a basis of the positional data, wherein: the first electromagnet and the second electromagnet are in a first row and are directly adjacent to each other, a first axis passes through a midpoint of the first electromagnet and a midpoint of the second electromagnet, the first electromagnet is electrically connected to a first wiring; the second electromagnet is electrically connected to a second wiring that is different from the first wiring so that a direction of current flowing in the second electromagnet is able to be changed independently of the first electromagnet, the third electromagnet is in a second row, a center axis of the third electromagnet passes through a midpoint of a distance between the first electromagnet and the second electromagnet, and the center axis is orthogonal to the first axis. ### Claim 11 (depends on 10) The display system according to claim 10, wherein the display portion and the curvature control mechanism overlap with each other. ### Claim 12 (depends on 10) The display system according to claim 10, wherein the display portion and the curvature control mechanism do not overlap with each other. ### Claim 13 (depends on 10) The display system according to claim 10, wherein the second electromagnet is configured to be supplied with a current in a same direction as a current flowing in the first electromagnet in a first state and a current in an opposite direction to a current flowing in the first electromagnet in a second state. ### Claim 14 (depends on 10) The display system according to claim 10, wherein the display portion and the curvature control mechanism are provided over one surface of a substrate. ### Claim 15 (depends on 10) The display system according to claim 10, wherein the display device is configured to be changed in shape in accordance with magnetic attraction or magnetic repulsion between the first electromagnet and the second electromagnet. ### Claim 16 (depends on 10) The display system according to claim 10, wherein the third electromagnet is electrically connected to the first wiring. ### Claim 17 (depends on 10) The display system according to claim 10, wherein: the movable portion is rotatable, the positional data detection sensor is configured to be moved in accordance with rotation of the movable portion. ### Claim 18 (depends on 10) The display system according to claim 10, further comprising a housing, wherein: the housing comprises the curvature control circuit and a rod, and the display device is configured to be rolled up with the rod.