公开(公告)号：US20150189427A1

公开(公告)日：2015-07-02

申请号：US14304732

申请日：2014-06-13

Applicant: RICHTEK TECHNOLOGY CORP

Inventor： Kuo Shih Tsai

IPC: H04R3/00

CPC classification number: H04R3/007

Abstract: A method and device for generating a driving signal of a loudspeaker is provided. The method includes the steps of: outputting a driving voltage to a loudspeaker; measuring a current flowing through the loudspeaker; calculating to derive a voltage value corresponding to the current flowing through an electrical impedance of the loudspeaker, and calculating to derive a back-emf value by performing subtraction according to the driving voltage or a corresponding value thereof and the voltage value; integrating the back-emf value to derive an integrating value positive-correlating to a displacement of the diaphragm of the loudspeaker; and manipulating the driving voltage according to the integrating value to perform protection on the loudspeaker.

Abstract translation: 提供了一种用于产生扬声器的驱动信号的方法和装置。 该方法包括以下步骤：向扬声器输出驱动电压; 测量流经扬声器的电流; 计算导出与流过扬声器的电阻抗的电流对应的电压值，并且通过根据驱动电压或其对应值和电压值进行减法来计算导出反电动势值; 积分反电动势值以导出与扬声器的振膜的位移正相关的积分值; 并根据积分值操纵驱动电压，对扬声器进行保护。

公开(公告)号：US09264829B2

公开(公告)日：2016-02-16

申请号：US14302680

申请日：2014-06-12

Applicant: RICHTEK TECHNOLOGY CORP

Inventor： Kuo Shih Tsai

IPC: H04R29/00 ,  H04R3/04

CPC classification number: H04R29/001 ,  H04R3/04

Abstract: A method and device for detecting a force factor of a loudspeaker is provided. The method includes the steps of: providing the loudspeaker with a dynamic driving voltage signal; continuously measuring a current signal flowing through the loudspeaker; observing the current signal and if the current signal shows that the diaphragm excursion of the loudspeaker is greater than an displacement limit, decreasing the driving voltage signal until the current signal shows that the diaphragm excursion of the loudspeaker is less than or equal to the displacement limit; and substituting the current driving voltage signal, the current signal, the displacement limit, and an electrical impedance of the loudspeaker into a function so as to compute the force factor of the loudspeaker.

Abstract translation: 提供一种用于检测扬声器的力因子的方法和装置。 该方法包括以下步骤：向扬声器提供动态驱动电压信号; 连续测量流经扬声器的电流信号; 观察电流信号，如果电流信号表明扬声器的振膜偏移大于位移极限，则降低驱动电压信号，直到当前信号显示扬声器的振膜偏移小于或等于位移极限 ; 并将扬声器的电流驱动电压信号，电流信号，位移限制和电阻抗代入功能，以计算扬声器的力因子。

公开(公告)号：US20150208189A1

公开(公告)日：2015-07-23

申请号：US14302680

申请日：2014-06-12

Applicant: RICHTEK TECHNOLOGY CORP

Inventor： Kuo Shih Tsai

IPC: H04R29/00 ,  H04R3/04

CPC classification number: H04R29/001 ,  H04R3/04

Abstract: A method and device for detecting a force factor of a loudspeaker is provided. The method includes the steps of: providing the loudspeaker with a dynamic driving voltage signal; continuously measuring a current signal flowing through the loudspeaker; observing the current signal and if the current signal shows that the diaphragm excursion of the loudspeaker is greater than an displacement limit, decreasing the driving voltage signal until the current signal shows that the diaphragm excursion of the loudspeaker is less than or equal to the displacement limit; and substituting the current driving voltage signal, the current signal, the displacement limit, and an electrical impedance of the loudspeaker into a function so as to compute the force factor of the loudspeaker.

Abstract translation: 提供一种用于检测扬声器的力因子的方法和装置。 该方法包括以下步骤：向扬声器提供动态驱动电压信号; 连续测量流经扬声器的电流信号; 观察电流信号，如果电流信号表明扬声器的振膜偏移大于位移极限，则降低驱动电压信号，直到当前信号显示扬声器的振膜偏移小于或等于位移极限 ; 并将扬声器的电流驱动电压信号，电流信号，位移限制和电阻抗代入功能，以计算扬声器的力因子。