Linear vibration generating device

Patent metadata

Field	Value
Publication number	US-11088606-B2
Application number	US-201816010887-A
Country	US
Kind code	B2
Filing date	Jun 18, 2018
Priority date	Jun 30, 2017
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A linear vibration generating device installed inside a cellular phone, a vibration bell or the like to generate vibration. Right after the power applied to the ‘circuit (a circuit generating and controlling vibration)’, which is one of elements constituting the linear vibration generating device, is turned off, the ‘circuit’ is configured as a short circuit. In addition, the linear vibration generating device can be easily manufactured since an additional space inside the linear vibration generating device is not required, and there is an outstanding effect of promptly removing residual vibration by increasing the amount of vibration damping after the vibration operation of the vibration generating device including a permanent magnet is finished.

First claim

What is claimed is:

1. A linear vibration generating device comprising:
a bracket ( 10 ) to which a coil ( 11 ) is fixed;
a case ( 20 ) combined with the bracket ( 10 );
a vibrator ( 30 ) including a permanent magnet ( 31 ) of a ring shape and provided inside the case; and
an elastic body combined with the vibrator ( 30 ),
wherein a response time is improved by using counter electromotive voltage that is generated after power of a circuit connected to the coil ( 11 ) is turned off,
wherein a short circuit (A) is configured after power of the circuit connected to the coil ( 11 ) is turned off in order to use the counter electromotive voltage.

2. The device according to claim 1 , wherein the short circuit (A) is configured using a reed switching system.

3. The device according to claim 2 , wherein whether there is a delay time before the short circuit (A) is configured after power of the circuit connected to the coil ( 11 ) is turned off is set by a user.

4. The device according to claim 3 , wherein the delay time varies according to setting of the user.

5. The device according to claim 1 , wherein the short circuit (A) is configured using a brake circuit including an H-bridge including a transistor pair.

6. The device according to claim 5 , wherein whether there is a delay time before the short circuit (A) is configured after power of the circuit connected to the coil ( 11 ) is turned off is set by a user.

7. The device according to claim 6 , wherein the delay time varies according to setting of the user.

8. The device according to claim 1 , wherein the short circuit (A) is configured using a circuit including a MOSFET.

9. The device according to claim 8 , wherein whether there is a delay time before the short circuit (A) is configured after power of the circuit connected to the coil ( 11 ) is turned off is set by a user.

10. The device according to claim 9 , wherein the delay time varies according to setting of the user.

11. A linear vibration control method comprising:
a power applying step of applying power to a circuit including a coil ( 11 );
a driving step of generating vibration as current flowing in the coil ( 11 ) by the power applying step reacts with a permanent magnet ( 31 );
a power shutdown step of shutting down the power applied to the circuit including the coil ( 11 ); and
a short circuit configuration step of short-circuiting the circuit including the coil 11 after the power is shut down by the power shutdown step.

12. The method according to claim 11 , further comprising an open circuit maintaining step of maintaining an open circuit state of the circuit including the coil after control on linear vibration is finished by the short circuit configuration step.

13. The method according to claim 12 , wherein the short circuit configuration step includes at least one of a first control step of configuring the short circuit through a reed switching system, a second step of configuring the short circuit through configuration of a brake circuit including an H-bridge, and a third step of configuring the short circuit through configuration of a circuit including a MOSFET.

14. The method according to claim 12 , further comprising a delay step between the power shutdown step and the short circuit configuration step.

Assignees

• Mplus Co Ltd

Inventors

• Lee Tae Hoon

Classifications

• G06F3/016 Primary

  Input arrangements with force or tactile feedback as computer generated output to the user · CPC title

• H02K33/18 Primary

  with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets · CPC title

• H02K11/30

  Structural association with control circuits or drive circuits · CPC title

• H02P25/034

  Voice coil motors (voice coil motors driven by DC H02P7/025) · CPC title

• H02P3/06

  for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter · CPC title