US 12,003,196 B2
Button type actuator, button type actuator feedback system comprising same, and control method therefor
Hyeong Jun Kim, Seoul (KR); Jong Hun Lee, Seoul (KR); and Ki Suk Son, Seoul (KR)
Assigned to CK MATERIALS LAB CO., LTD., Seoul (KR)
Appl. No. 17/059,446
Filed by CK MATERIALS LAB CO., LTD., Seoul (KR)
PCT Filed Dec. 19, 2018, PCT No. PCT/KR2018/016198
§ 371(c)(1), (2) Date Nov. 29, 2020,
PCT Pub. No. WO2019/231067, PCT Pub. Date Dec. 5, 2019.
Claims priority of application No. 10-2018-0060995 (KR), filed on May 29, 2018; application No. 10-2018-0085483 (KR), filed on Jul. 23, 2018; and application No. 10-2018-0085484 (KR), filed on Jul. 23, 2018.
Prior Publication US 2021/0159815 A1, May 27, 2021
Int. Cl. H02N 2/06 (2006.01); G06F 3/01 (2006.01); G06F 3/02 (2006.01); G06F 3/041 (2006.01); H02N 2/02 (2006.01)
CPC H02N 2/06 (2013.01) [G06F 3/016 (2013.01); G06F 3/0202 (2013.01); G06F 3/041 (2013.01); H02N 2/026 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An actuator feedback system comprising:
a case;
a button part of which at least a portion moves with respect to the case;
a vibrator connected to the button part and comprising a magnetic body;
a coil configured to generate a magnetic field in the vibrator; and
a controller configured to apply, based on a magnitude or a direction of an induced electromotive force generated in the coil as the button part is manipulated by a user, a current to the coil to move the vibrator,
wherein the controller comprises:
an input detection unit configured to detect the induced electromotive force generated in the coil when the button part is manipulated; and
a signal control unit configured to determine, based on information on the induced electromotive force detected by the input detection unit, a time point when the vibrator starts to be moved.