US 12,189,343 B2
Electronic watch
Toshiyuki Nozawa, Okaya (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Nov. 24, 2021, as Appl. No. 17/534,608.
Claims priority of application No. 2020-195829 (JP), filed on Nov. 26, 2020.
Prior Publication US 2022/0163927 A1, May 26, 2022
Int. Cl. G04C 3/14 (2006.01); G04G 9/00 (2006.01)
CPC G04C 3/14 (2013.01) [G04G 9/0082 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An electronic watch, comprising:
a first hand configured to be rotated by a first motor, and indicate a higher digit of numerical information or time information;
a second hand configured to be rotated by a second motor, and indicate a lower digit of the numerical information or the time information; and
a motor controller configured to control the first motor and the second motor so as to:
perform a numerical value indication mode for simultaneously driving the first motor and the second motor to indicate an increase or decrease in the numerical information by hand step movement of each of the first and second hands, or a time correction mode for simultaneously driving the first motor and the second motor to correct the time information; and
in the numerical value indication mode or the time correction mode, the motor controller is further configured to:
control a drive frequency of the first motor and a drive frequency of the second motor such that angular velocity of the hand step movement of the first hand is less than angular velocity of the hand step movement of the second hand;
control the first motor to cause the first hand to stop for a first period of time after the first hand moves a plurality of steps as the hand step movement while the second motor causes the second hand to continuously move as the hand step movement; and
control the first motor to move the first hand as the hand step movement after the first period of time elapses while the second motor causes the second hand to continuously move as the hand step movement.