JPS5770479A - Hand type electronic watch with lamp illumination - Google Patents

Hand type electronic watch with lamp illumination

Info

Publication number
JPS5770479A
JPS5770479A JP14630380A JP14630380A JPS5770479A JP S5770479 A JPS5770479 A JP S5770479A JP 14630380 A JP14630380 A JP 14630380A JP 14630380 A JP14630380 A JP 14630380A JP S5770479 A JPS5770479 A JP S5770479A
Authority
JP
Japan
Prior art keywords
lamp
time
goes
counter
supplied
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14630380A
Other languages
Japanese (ja)
Inventor
Hisashi Kawahara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Citizen Holdings Co Ltd
Citizen Watch Co Ltd
Original Assignee
Citizen Holdings Co Ltd
Citizen Watch Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Citizen Holdings Co Ltd, Citizen Watch Co Ltd filed Critical Citizen Holdings Co Ltd
Priority to JP14630380A priority Critical patent/JPS5770479A/en
Publication of JPS5770479A publication Critical patent/JPS5770479A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
    • G04C3/143—Means to reduce power consumption by reducing pulse width or amplitude and related problems, e.g. detection of unwanted or missing step

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)

Abstract

PURPOSE:To prevent delay in display time despite the occurrence of voltage drop owing to lamp lighting by stopping driving of a motor during lamp lighting and fast feeding the motor as much as for stop time after putting out of the lamp thereby correcting the time. CONSTITUTION:When a lamp switch S is turned on, a lamp L goes on. At the same time, an up-down counter 15a strts counting the pulses supplied to the up input. Next, when the switch S is turned off, the lamp L goes off, and a motor 9 is fast fed by a frequency divided signal B of 32, Hz, and the correction operation for restoring the time delay is started. No more up signals P8 are supplied to the counter 15a, and in turn, down signals P9 of 32 Hz are supplied. When the content of the counter 15a goes zero, this is detected 15b, and the ordinary stepping operation of 1Hz is resumed.
JP14630380A 1980-10-21 1980-10-21 Hand type electronic watch with lamp illumination Pending JPS5770479A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14630380A JPS5770479A (en) 1980-10-21 1980-10-21 Hand type electronic watch with lamp illumination

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14630380A JPS5770479A (en) 1980-10-21 1980-10-21 Hand type electronic watch with lamp illumination

Publications (1)

Publication Number Publication Date
JPS5770479A true JPS5770479A (en) 1982-04-30

Family

ID=15404621

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14630380A Pending JPS5770479A (en) 1980-10-21 1980-10-21 Hand type electronic watch with lamp illumination

Country Status (1)

Country Link
JP (1) JPS5770479A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57139683A (en) * 1981-02-24 1982-08-28 Seiko Instr & Electronics Ltd Electronic clock
JPS5940190A (en) * 1982-08-30 1984-03-05 Seiko Epson Corp Electronic timepiece with timer
US5785657A (en) * 1994-01-14 1998-07-28 Pacesetter Ab Blood flow measurement device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57139683A (en) * 1981-02-24 1982-08-28 Seiko Instr & Electronics Ltd Electronic clock
JPS5940190A (en) * 1982-08-30 1984-03-05 Seiko Epson Corp Electronic timepiece with timer
JPH043513B2 (en) * 1982-08-30 1992-01-23
US5785657A (en) * 1994-01-14 1998-07-28 Pacesetter Ab Blood flow measurement device

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