公开(公告)号：US20170115502A1

公开(公告)日：2017-04-27

申请号：US14920249

申请日：2015-10-22

Applicant: STMicroelectronics, Inc.

Inventor： Chih-Hung TAI ,  Felix KIM ,  Mark A. LYSINGER

IPC: G02B27/64

CPC classification number: G02B27/646

Abstract: Various embodiments provide an optical image stabilization circuit that synchronizes its gyroscope and drive circuit using gyroscope data ready signals and gyroscope reset signals. In response to a gyroscope data ready signal, the optical image stabilization circuit synchronously obtains position measurements of a camera lens when power drive signals are not transitioning from one power level to another power level, and synchronously transitions the power drive signals simultaneously with gyroscope reset signals. By synchronizing the gyroscope and the drive circuit, the gyroscope and other onboard sensing circuits are isolated from noise generated by the drive circuit.

公开(公告)号：US20200089021A1

公开(公告)日：2020-03-19

申请号：US16694749

申请日：2019-11-25

Applicant: STMicroelectronics, Inc.

Inventor： Mark A. Lysinger ,  Pavan Nallamothu ,  Chih-Hung TAI ,  James L. WORLEY

IPC: G02B27/64 ,  H02P7/025 ,  H02K41/035

Abstract: Various embodiments provide an optical image stabilization circuit including a drive circuit having a power waveform generator and a power waveform conversion circuit. The power waveform generator generates a power waveform. The power waveform conversion circuit converts the power waveform to a power drive signal. An actuator is then driven by the power drive signal to move a lens accordingly and compensate for any movements and vibrations of a housing of the lens.

公开(公告)号：US20190293957A1

公开(公告)日：2019-09-26

申请号：US16440008

申请日：2019-06-13

Applicant: STMicroelectronics, Inc.

Inventor： Chih-Hung TAI ,  Felix KIM ,  Mark A. LYSINGER

IPC: G02B27/64

Abstract: Various embodiments provide an optical image stabilization circuit that synchronizes its gyroscope and drive circuit using gyroscope data ready signals and gyroscope reset signals. In response to a gyroscope data ready signal, the optical image stabilization circuit synchronously obtains position measurements of a camera lens when power drive signals are not transitioning from one power level to another power level, and synchronously transitions the power drive signals simultaneously with gyroscope reset signals. By synchronizing the gyroscope and the drive circuit, the gyroscope and other onboard sensing circuits are isolated from noise generated by the drive circuit.