EP 0347249 A3 19910320 - AN IC CHIP FOR AN ANALOG ELECTRONIC WATCH
Title (en)
AN IC CHIP FOR AN ANALOG ELECTRONIC WATCH
Publication
Application
Priority
JP 15087388 A 19880617
Abstract (en)
[origin: EP0347249A2] An IC chip (20) for an analog electronic watch has a core CPU (201), a program memory (202) for storing software for actuating the core CPU, and a motor drive controlling circuit (212) for controlling a plurality of step motors according to commands of the software. An analog electronic watch having such an IC chip also has a plurality of step motors, and at least one gear train mechanism to couple each step motor to a rotatable indicator hand. Drive of the step motors can be controlled arbitrarily according to the software stored in the program memory.
IPC 1-7
IPC 8 full level
G04C 3/14 (2006.01); G04C 3/00 (2006.01); G04C 23/08 (2006.01); G04F 8/02 (2006.01); G04G 99/00 (2010.01)
CPC (source: EP KR)
G04C 3/14 (2013.01 - EP); G04C 9/00 (2013.01 - KR); G04G 9/00 (2013.01 - KR); G04G 99/00 (2013.01 - EP)
Citation (search report)
- [X] GB 2154767 A 19850911 - CITIZEN WATCH CO LTD
- [X] US 4382692 A 19830510 - WIGET FRIDOLIN [CH], et al
- [X] GB 2167884 A 19860604 - CITIZEN WATCH CO LTD
- [A] DE 3325302 A1 19840119 - TOKYO SHIBAURA ELECTRIC CO [JP]
- [A] JOURNAL SUISSE D'HORLOGERIE ET DE BIJOUTERIE, no. 2, 1981, pages 331-346, Lausanne, CH; "Réparation des montres à affichage combiné: analogique + LCD"
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
EP 0347249 A2 19891220; EP 0347249 A3 19910320; EP 0347249 B1 19940601; CN 1025458 C 19940713; CN 1038708 A 19900110; DE 68915618 D1 19940707; DE 68915618 T2 19940915; HK 107097 A 19970822; JP 2000046967 A 20000218; JP 3019324 B2 20000313; JP 3259718 B2 20020225; JP H0277679 A 19900316; JP H11194178 A 19990721; KR 900000740 A 19900131; KR 940008709 B1 19940926
DOCDB simple family (application)
EP 89306144 A 19890616; CN 89104052 A 19890615; DE 68915618 T 19890616; HK 107097 A 19970626; JP 15007989 A 19890613; JP 23580599 A 19990823; JP 29742298 A 19981019; KR 890008299 A 19890616