(19)
(11) EP 3 203 329 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
11.10.2017 Bulletin 2017/41

(43) Date of publication:
09.08.2017 Bulletin 2017/32

(21) Application number: 15847697.8

(22) Date of filing: 29.09.2015
(51) International Patent Classification (IPC): 
G04C 3/14(2006.01)
 H02P 8/02(2006.01)
(86) International application number:
PCT/JP2015/077635
(87) International publication number:
WO 2016/052577 (07.04.2016 Gazette 2016/14)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
MA

(30) Priority: 30.09.2014 JP 2014200137

(71) Applicant: CITIZEN WATCH CO., LTD.
Tokyo 188-8511 (JP)

(72) Inventors:
  • IRI, Daisuke
    Nishitokyo-shi Tokyo 188-8511 (JP)
  • TAKYOH, Yu
    Nishitokyo-shi Tokyo 188-8511 (JP)

(74) Representative: Michalski Hüttermann & Partner Patentanwälte mbB 
Speditionstraße 21
40221 Düsseldorf
40221 Düsseldorf (DE)

   


(54) ELECTRONIC CLOCK


(57) Anelectronicwatch (1) includes: a step motor (30) ; a driving pulse generator circuit (5) configured to output a driving pulse (SP) for driving the step motor; a detection pulse generator circuit (10) configured to output a detection pulse for detecting rotation of the step motor; a correction pulse generator circuit (6) configured to output a correction pulse (FP) ; a pulse selection circuit (7) configured to select and output the driving pulse, the detection pulse, and the correction pulse (FP); a driver circuit (20) configured to supply to the step motor the outputs from the pulse selection circuit (7); and a rotation detection circuit (40) configured to receive a detection signal generated by the detection pulse (CP) to judge rotation of the step motor. The electronic watch (1) further includes a driving interval switch circuit (4) configured to switch a driving interval of the driving pulse (SP) between a normal driving interval and a high-speed driving interval. The rotation detection circuit (40) is capable of changing a detection condition by the driving interval switch circuit (4).