Aac Technologies Pte. Ltd.

Lijian Ye

Rongguan Zhou

Huan Ge

Bin Xu

Chao Wang

Xingzhi Huang

Yao Hui

Henglizi Zhang

Zijie Zhang

Feng Shan

Kaitai Pan

The present invention provides a speaker having a vibrating system and a magnetic circuit system for driving the vibrating system to vibrate and sound. The magnetic circuit system has magnetic gap. The vibrating system includes vibrating assembly and voice coil assembly connected to the vibrating assembly, the voice coil assembly is inserted into the magnetic gap. The magnetic circuit system has a magnetic line concentrating area in the magnetic gap. The voice coil assembly includes a first voice coil connected to the vibrating assembly and a second voice coil arranged on the first voice coil at a side away from the vibrating assembly. if in the magnetic line concentrating area locates only the first voice coil, an electric signal is input only to the first voice coil; if in the magnetic line concentrating area locates only the second voice coil, electric signal is input only to the second voice coil.

Speaker includes a second fixing arm of an elastic supporting member sandwiched between two independently controlled voice coils

The invention discloses a real-time vibration state monitoring system. The system includes a linear motor, a signal generating module for driving the linear motor to vibrate, a working parameters feedback module, a calculating module, an initial position recording module, and a signal control module. The system can control the amplitude of the vibrator by monitoring the vibration state of the vibrator in the linear motor and adjusting the drive signal; therefore, the effect to normal working or reliability of the linear motor due to oversized amplitude can be avoided. A monitoring method is also provided.

Real-time vibration state monitoring system and monitoring method thereof

The present disclosure discloses a linear vibration motor driver including an amplitude and temperature testing unit, a gain controller, and a coil resistance detector and an amplifier. The amplitude and temperature testing unit receives a motor drive input signal and a feedback drive signal output by the amplifier, and outputs a corresponding estimated motor amplitude and real-time temperature according to the motor drive input signal and the feedback drive signal. The amplifier adjusts magnification, amplifies the motor drive input signal according to the magnification and outputs the feedback drive signal to drive the motor. The present disclosure can adjust the magnitude of the drive signal according to current estimated amplitude and maximum amplitude and make corresponding rectification of the amplifier magnification upon too high temperature to extend the service life of the motor.

Linear motor driver and method for driving same

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Shenzhen, China

Lijian Ye