System for levitating mobile terminal

Patent metadata

Field	Value
Publication number	US-10312718-B2
Application number	US-201415314858-A
Country	US
Kind code	B2
Filing date	Jun 10, 2014
Priority date	May 30, 2014
Publication date	Jun 4, 2019
Grant date	Jun 4, 2019

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.

First claim

The invention claimed is:

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.

2. 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.

3. 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.

4. The system according to claim 1 , wherein the second permanent magnet includes a ferrite magnet.

5. 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.

6. 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.

7. 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.

8. 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.

9. 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.

10. 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.

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.

12. 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.

13. 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.

14. 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.

15. 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.

16. 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.

17. 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.

18. 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.

Assignees

• Lg Electronics Inc

Inventors

• Hahn Sangwook
• Yoo Inseok
• Kim Taehyun
• Hong Sukho
• Lee Byunghwa

Classifications

• H02J7/70 Primary

  characterised by the mechanical construction · CPC title

• H02J50/90

  involving detection or optimisation of position, e.g. alignment · CPC title

• H02J50/12

  of the resonant type · CPC title

• H02N15/00

  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}) · CPC title

• H02J7/0042

  Electricity · mapped topic