公开(公告)号：US20190356111A1

公开(公告)日：2019-11-21

申请号：US16415983

申请日：2019-05-17

Applicant: STANLEY ELECTRIC CO., LTD.

Inventor： Ken NISHIOKA

IPC: H01S5/0683 ,  H01S5/042 ,  G01J1/44

Abstract: In a light emission driving device (1), a high speed APC circuit (11) has a time constant τ1 to reach a target light intensity and a low speed APC circuit (13) has a time constant τ2 larger than the time constant τ1 to reach the target light intensity. A control unit (9) of the light emission driving device (1) uses the high speed APC circuit (11) at the time of startup of the light emission driving device (1), and when a predetermined time has passed after the light intensity of laser light has reached the target light intensity, switches to the low speed APC circuit (13) and supplies an initial signal causing the low speed APC circuit (13) to output a driving signal corresponding to the target light intensity.

公开(公告)号：US20210231946A1

公开(公告)日：2021-07-29

申请号：US17151711

申请日：2021-01-19

Applicant: STANLEY ELECTRIC CO., LTD.

Inventor： Ken NISHIOKA

IPC: G02B26/10 ,  G02B26/12 ,  G02B26/08

Abstract: A light deflector 130 includes: a control unit 106 configured to generate a resonant drive signal for resonantly driving an MEMS mirror 133, and a non-resonant drive signal for non-resonantly driving the MEMS mirror 133; a resonant sensor 144 configured to detect the resonant drive of the MEMS mirror 133 and generate a resonant sensor signal; and a sensor signal processing unit 103 configured to acquire a phase difference between the resonant drive signal generated by the control unit 106 and the resonant sensor signal, in a case where the MEMS mirror 133 is resonantly driven in a Y-axis direction, also the MEMS mirror 133 is non-resonantly driven in an X-axis direction, and scanning is performed. The control unit 106 calculates an amplitude of the non-resonant drive of the MEMS mirror 133 on the basis of a change in the above phase difference.

公开(公告)号：US20240241368A1

公开(公告)日：2024-07-18

申请号：US18561891

申请日：2022-05-13

Applicant: STANLEY ELECTRIC CO., LTD.

Inventor： Naoya MATSUMARU ,  Ken NISHIOKA

IPC: G02B26/08 ,  G02B26/10

CPC classification number: G02B26/0858 ,  G02B26/101

Abstract: An optical deflector driving method includes inputting an instruction to change at least one of a first driving signal corresponding to a first driving voltage and a second driving signal corresponding to a second driving voltage, the first driving voltage and the second driving voltage being applied to an actuator swinging a mirror portion of an optical deflector around a swing axis; determining, in a case where the instruction is input, a timing when a voltage of a driving signal to be changed out of the first driving signal and the second driving signal becomes minimum; and reflecting, in a case where it is determined that the timing when the voltage of the driving signal to be changed becomes minimum comes, the change on the driving signal to be changed.