US 12,149,191 B2
Vibration generator and vibration generation method
Hitoshi Shirashima, Fukushima (JP); and Kazuhiko Kinemura, Miyagi (JP)
Assigned to ALPS ALPINE CO., LTD., Tokyo (JP)
Filed by Alps Alpine Co., LTD, Tokyo (JP)
Filed on Dec. 15, 2022, as Appl. No. 18/082,301.
Claims priority of application No. 2021-204997 (JP), filed on Dec. 17, 2021.
Prior Publication US 2023/0198442 A1, Jun. 22, 2023
Int. Cl. H02P 25/034 (2016.01); G06F 3/01 (2006.01); H02K 33/18 (2006.01)
CPC H02P 25/034 (2016.02) [G06F 3/016 (2013.01); H02K 33/18 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A vibration generator that outputs a drive signal to an actuator that vibrates a vibrator supported by an elastic member in response to the drive signal, the vibration generator comprising:
a drive signal output section configured to output the drive signal to the actuator,
wherein the drive signal output section outputs a one-shot drive signal not having negative potential, as a first drive signal to the actuator, and thereafter outputs a one-shot drive signal not having a negative potential, as a second drive signal to the actuator,
wherein the first drive signal rises to a positive side when the vibrator is vibrated, has a voltage changing on the positive side, and adds a force to move the vibrator or a vibration target vibrating in conjunction with the vibration of the vibrator in a first direction,
wherein the second drive signal is output such that a timing when a movement of the vibrator or the vibration target reaches a first peak of the movement in a second direction coincides with a timing of start of rise of the second drive signal, wherein the second direction is opposite to the first direction, and wherein the amplitude of the vibration of the vibrator is increased due to the input of the second drive signal.