METHOD FOR DRIVING VIBRATING MOTOR

• US 20170025980A1
• Filed: 03/27/2016
• Published: 01/26/2017
• Est. Priority Date: 07/20/2015
• Status: Active Grant

• Current Assignee: AAC Technologies Pte Limited (AAC Technologies Holdings Inc.)
• Original Assignee: AAC Technologies Pte Limited (AAC Technologies Holdings Inc.)
• Inventors: Wang, HongXing
• Granted Patent: US 9,774,289 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02P 25/032 Reciprocating, oscillating or vibrating motors

Abstract

A method for driving a vibrating motor is provided in the present disclosure. The method includes the following steps: providing a driving signal to a vibrating motor; detecting a vibration direction of a vibrating unit of the vibrating motor; determining whether the driving signal facilitates vibration of the vibrating unit; and switching a polarity of the driving signal when the driving signal does not facilitate the vibration of the vibrating unit.

Claims

1. A method for driving a vibrating motor, comprising the following steps:

providing a driving signal to a vibrating motor;

detecting a vibration direction of a vibrating unit of the vibrating motor;

determining whether the driving signal facilitates vibration of the vibrating unit; and

switching a polarity of the driving signal when the driving signal does not facilitate the vibration of the vibrating unit.

2. The method for driving a vibrating motor as described in claim 1, wherein the driving signal is a periodic electric signal, and each signal period of the driving signal comprises a positive sub-period and a negative sub-period, the driving signal is a positive driving signal in the positive sub-period, and is a negative driving signal in the negative sub-period.

3. The method for driving a vibrating motor as described in claim 2, wherein the driving signal is provided to the vibrating motor for generating a driving force to drive the vibrating unit to vibrate;

and the driving force comprises a positive driving force corresponding to the positive driving signal, and a negative driving corresponding to the negative driving signal.

4. The method for driving a vibrating motor as described in claim 3, wherein the vibration direction of the vibrating unit is detected by a detector integrated in an electronic device in which the vibrating motor is applied.

5. The method for driving a vibrating motor as described in claim 4, wherein when the detector detects that the vibration direction is a positive moving direction, the detector generates a first detecting signal;

when the detector detects that the vibration direction is a negative moving direction, the detector generates a second detecting signal.

6. The method for driving a vibrating motor as described in claim 1, wherein the vibration direction of the vibrating unit is detected by detecting an induced potential generated by a metal part of the vibrating motor.

7. The method for driving a vibrating motor as described in claim 6, wherein the metal part generates a first induced potential when the vibrating unit moves in a positive moving direction, and generates a second induced potential when the vibrating unit moves in a negative moving direction.

8. The method for driving a vibrating motor as described in claim 1, further comprising:

upon determining that the driving signal facilitates the vibration of the vibrating unit, returning to detecting the vibration direction of the vibrating unit to perform real-time detection on the vibration direction.

9. The method for driving a vibrating motor as described in claim 3, wherein the driving signal is determined as facilitating a vibration of the vibrating motor when a direction of the driving force corresponding to the driving signal is coincident with the vibration direction of the vibrating unit.

10. The method for driving a vibrating motor as described in claim 9, wherein when the positive driving signal is applied to the vibrating motor while the vibrating unit moves in a positive moving direction, or when the negative driving signal is applied to the vibrating motor while the vibrating unit moves in a negative moving direction, the driving signal is determined as facilitating the vibration of the vibrating unit.

11. The method for driving a vibrating motor as described in claim 10, wherein when the positive driving signal is applied to the vibrating motor while the vibrating unit moves in the negative moving direction, or when the negative driving signal is applied to the vibrating motor while the vibrating unit moves in the positive moving direction, the driving signal is determined as not facilitating the vibration of the vibrating unit.

12. The method for driving a vibrating motor as described in claim 1, wherein when the driving signal is a positive driving signal and is determined as not facilitating the vibration of the vibrating unit, the driving signal is switched to a negative driving signal.

13. The method for driving a vibrating motor as described in claim 12, wherein when the driving signal is a negative driving signal and is determined as not facilitating the vibration direction of the vibrating unit, the driving signal is switched to a positive driving signal.

14. The method for driving a vibrating motor as described in claim 1, wherein the driving signal is a periodic electric signal with an adjustable signal period.

15. The method for driving a vibrating motor as described in claim 14, further comprising:

determining whether a vibration period of the vibrating unit reaches a natural period; and

adjusting a signal period of the driving signal to a natural period of the vibrating unit.

16. The method for driving a vibrating motor as described in claim 1, wherein the driving signal is a periodic electric signal with a fixed signal period equal to a natural period of the vibrating motor.

17. The method for driving a vibrating motor as described in claim 16, further comprising:

determining whether the driving signal stops being provided to the vibrating motor; and

controlling the vibrating unit to stop vibration when the driving signal stops being provided to the vibrating motor.