US 12,424,367 B2
Control device and vibration presenting apparatus
Toru Dan, Tokyo (JP); and Thi Hong Thu Nguyen, Tokyo (JP)
Assigned to MITSUMI ELECTRIC CO., LTD., Tokyo (JP)
Filed by Toru Dan, Tokyo (JP); and Thi Hong Thu Nguyen, Tokyo (JP)
Filed on Sep. 18, 2023, as Appl. No. 18/369,508.
Claims priority of application No. 2022-149088 (JP), filed on Sep. 20, 2022; and application No. 2023-127739 (JP), filed on Aug. 4, 2023.
Prior Publication US 2024/0105373 A1, Mar. 28, 2024
Int. Cl. H01H 47/00 (2006.01); B06B 1/04 (2006.01); H01F 7/06 (2006.01); H01F 7/08 (2006.01)
CPC H01F 7/064 (2013.01) [B06B 1/045 (2013.01); H01F 7/081 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A control device that controls an electromagnetic actuator, the electromagnetic actuator driving an operation device in one direction of a vibration direction of the operation device to vibrate the operation device, the operation device being supported in an elastically vibratable manner by an elastic support part, wherein
the control device includes a circuit, the circuit applying a main driving signal to a coil of the electromagnetic actuator to start vibration of the operation device in response to a touch operation on the operation device, the circuit then applying a sub-driving signal to the coil to adjust an attenuation period of the vibration,
the sub-driving signal has a variable voltage, the variable voltage varying with an offset voltage as a center value, the offset voltage being offset from a zero voltage, a waveform that indicates a variation in the variable voltage being a sine function curve or a cosine function curve, and
the circuit stops application of the offset voltage during at least one of a period between the main driving signal and the sub-driving signal and/or a period between a plurality of the sub-driving signals.