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| Number | Title | Issue Date |
| 8351303 | Stepping motor controller and analog electronic timepiece An invention allows a stepping motor to be reliably driven to rotate when initializing the driving and allows power consumption of the stepping motor to be reduced. The controller, when initializing the driving (for example, replacing a battery), controls a main dri... | 01/08/2013 |
| 8335135 | Stepping motor control circuit and analogue electronic timepiece When a stepping motor is driven to rotate by a main driving pulse, if an induced signal exceeding a reference threshold voltage is detected only in a third segment, a pulse down operation is performed, and the main driving pulse is not changed when the same is detec... | 12/18/2012 |
| 8319468 | Stepping motor control circuit and analogue electronic timepiece The present invention aims to prevent a main drive pulse from being moved to a rank having a potential to cause a non-rotating state. A detection segment for detecting a rotating state of a stepping motor is divided into a first segment immediately after the drive w... | 11/27/2012 |
| 8295131 | Chronograph timepiece In a chronograph timepiece in which the chronograph hands are electrically rotated by a motor drive pulse and are mechanically zero-restoring-controlled, a basic drive control unit controls a motor so as to drive the chronograph hands when it is detected by a contac... | 10/23/2012 |
| 8289816 | Chronograph timepiece Disclosed is a chronograph timepiece whose chronograph hands are electrically drive-controlled and mechanically zero-restoring-controlled, wherein it possible to perform a normal operation at the time of start operation and reset operation. After a mechanical contro... | 10/16/2012 |
| 8274863 | Chronograph timepiece Disclosed is a chronograph timepiece in which it is possible to prevent the battery reliability service life time from being exceeded even when the period of time that the chronograph function is used is short, making it possible to prevent failure generation in the... | 09/25/2012 |
| 8223594 | Chronograph timepiece Disclosed is a chronograph timepiece in which it is possible to prevent the chronograph drive timing and the magnetic field detection timing from overlapping each other to unnecessarily effect driving with correction drive pulses. A processing unit controls drive ci... | 07/17/2012 |
| 8215827 | Chronograph timepiece When it is judged that a chronograph second counter and a chronograph minute counter have measured a maximum measurement time, a maximum measurement control unit controls a drive pulse generation circuit so as to drive and stop a motor such that chronograph hand sto... | 07/10/2012 |
| 8213268 | Chronograph timepiece Disclosed is a chronograph timepiece in which it is possible to prevent a non-rotation state at the time of first driving when chronograph measuring operation is reset during motor drive and restarting is effected. When a resetting operation is performed on a reset ... | 07/03/2012 |
| 8139445 | Stepping motor control circuit and analog electronic watch A stepping motor control circuit includes a rotation detecting means which detects an induced signal generated by rotation of a rotor of a stepping motor, and detects a rotation state of the stepping motor according to whether the induced signal exceeds a predetermi... | 03/20/2012 |
| 8111033 | Stepping motor control circuit and analog electronic timepiece The present invention aims to prevent a nonrotation state from being brought about even when a drive allowance is changed by variations in a stepping motor or the like. A pulse down counter circuit outputs pulse down control signal for subjecting main drive pulse to... | 02/07/2012 |
