# US 10,312,718 B2 · System for levitating mobile terminal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,312,718 B2 - Document ID: US10312718B2 - Status: Granted - Kind: B2 - Application number: 15/314,858 - Filed: 2014-06-10 - Published: 2017-07-13 - Granted: 2019-06-04 - Earliest claimed: 2014-05-30 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Sangwook Hahn; Inseok Yoo; Taehyun Kim; Sukho Hong; Byunghwa Lee - Web page: https://patentgrep.com/patent/US10312718B2 ## CPC - H02J 50/70: involving the reduction of electric, magnetic or electromagnetic leakage fields - H02J 50/12: of the resonant type - H02J 50/90: involving detection or optimisation of position, e.g. alignment - H02N 15/00: Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for (electric or magnetic devices for holding work on machine tools B23Q3/15 {; monorail vehicle propulsion or suspension B60L13/00}; sliding or levitation devices for railway systems B61B13/08; material handling devices associated with conveyors incorporating devices with electrostatic or magnetic grippers B65G47/92; separating thin or filamentary articles from piles using magnetic force B65H3/16; delivering thin or filamentary articles from magnetic holders by air blast or suction B65H29/24; bearings using magnetic or electric supporting means F16C32/04; relieving bearing loads using magnetic means F16C39/06; magnets H01F7/00; dynamo-electric clutches or brakes H02K49/00 {; electric furnaces with simultaneous levitation and heating H05B6/32}) - H02J 7/70: characterised by the mechanical construction - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H02N: ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR ## Abstract A levitation system that allows a mobile terminal to levitate from the bottom using the magnetic levitation principle and to provide a system for levitating a mobile terminal, which enables the mobile terminal to be wirelessly charged in a state in which the mobile terminal levitates, is provided. ## Claims ### Claim 1 A system for levitating a mobile terminal, the system comprising: a levitation unit mounted on a rear surface of the mobile terminal; and a levitation module configured to levitate the levitation unit upward, wherein the levitation unit includes: a mounting case; and a first permanent magnet placed in the mounting case, wherein the levitation module includes: a housing; a magnet module disposed in the housing to generate a magnetic field for levitating the levitation unit; and a control unit connected to the magnet module to control a current supplied to the magnet module, wherein the magnet module includes: a plurality of electromagnets configured to generate a magnetic field for allowing a repulsive force to act on the first permanent magnet; and a second permanent magnet configured to generate a magnetic field for allowing an attractive force to act on the first permanent magnet, and wherein the levitation module is configured to: rotate the mobile terminal about a vertical axis if an event is occurred at the mobile terminal in a state that the mobile terminal levitates. ### Claim 2 (depends on 1) The system according to claim 1, wherein the levitation module is configured to rotate the mobile terminal in a clockwise direction or in a counterclockwise. ### Claim 3 (depends on 1) The system according to claim 1, wherein the levitation module is configured to control the current supplied to the magnet module such that a magnetic force in a Z-axis direction is constantly maintained and magnetic forces in a X-axis direction and a Y-axis direction are changed. ### Claim 4 (depends on 1) The system according to claim 1, wherein the second permanent magnet includes a ferrite magnet. ### Claim 5 (depends on 1) The system according to claim 1, further comprising: a charging coil mounted at one side of an inside of the housing, the charging coil configured to receive a current supplied through the control unit to generate a magnetic field, and transmit, wirelessly, a power to a coil mounted in the mobile terminal in the state in which the mobile terminal levitates. ### Claim 6 (depends on 5) The system according to claim 5, wherein the charging coil transmits the power to the coil using a magnetic induction type or a magnetic resonance. ### Claim 7 (depends on 5) The system according to claim 5, wherein the levitation module is further configured to cut off the current supplied to the charging coil if charging of a battery mounted in the mobile terminal is completed. ### Claim 8 (depends on 1) The system according to claim 1, wherein the levitation module is further configured to cut off the current supplied to the magnet module if the mobile terminal is separated from a levitation area, the current supplied to the magnet module is cut off. ### Claim 9 (depends on 1) The system according to claim 1, wherein the event is occurred if the mobile terminal is moved in the state that the mobile terminal levitates. ### Claim 10 (depends on 1) The system according to claim 1, wherein the event includes any one event among a reception of a voice or video call, a reception of a text message, an alarm, a notification of charging completion, and a reception of an e-mail. ### Claim 11 A levitation module for levitating a levitation unit mounted on a rear surface of the mobile terminal, the levitation module comprising: a housing; a magnet module disposed in the housing to generate a magnetic field for levitating the levitation unit; and a control unit connected to the magnet module to control a current supplied to the magnet module, wherein the magnet module includes: a plurality of electromagnets configured to generate a magnetic field for allowing a repulsive force to act on a first permanent magnet included in the levitation unit; and a second permanent magnet configured to generate a magnetic field for allowing an attractive force to act on the first permanent magnet, and wherein the levitation module is configured to: rotate the mobile terminal about a vertical axis if an event is occurred at the mobile terminal in a state that the mobile terminal levitates. ### Claim 12 (depends on 11) The levitation module according to claim 11, wherein the levitation module is configured to rotate the mobile terminal in a clockwise direction or in a counterclockwise. ### Claim 13 (depends on 11) The levitation module according to claim 11, wherein the levitation module is configured to control the current supplied to the magnet module such that a magnetic force in a Z-axis direction is constantly maintained and magnetic forces in a X-axis direction and a Y-axis direction are changed. ### Claim 14 (depends on 11) The levitation module according to claim 11, further comprising: a charging coil mounted at one side of an inside of the housing, the charging coil configured to receive a current supplied through the control unit to generate a magnetic field, and transmit, wirelessly, a power to a coil mounted in the mobile terminal in the state in which the mobile terminal levitates. ### Claim 15 (depends on 14) The levitation module according to claim 14, wherein the charging coil transmits the power to the coil using a magnetic induction type or a magnetic resonance. ### Claim 16 (depends on 14) The levitation module according to claim 14, wherein the levitation module is further configured to cut off the current supplied to the charging coil if charging of a battery mounted in the mobile terminal is completed. ### Claim 17 (depends on 11) The levitation module according to claim 11, wherein the levitation module is further configured to cut off the current supplied to the magnet module if the mobile terminal is separated from a levitation area, the current supplied to the magnet module is cut off. ### Claim 18 (depends on 11) The levitation module according to claim 11, wherein the event includes any one event among a reception of a voice or video call, a reception of a text message, an alarm, a notification of charging completion, and a reception of an e-mail.