Electronic timepiece

Patent metadata

Field	Value
Publication number	US-10088808-B2
Application number	US-201615086394-A
Country	US
Kind code	B2
Filing date	Mar 31, 2016
Priority date	Apr 24, 2015
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

An electronic timepiece includes a date indicator that is an analog display member, a date indicator motor that drives the date indicator, a display position storage that is a nonvolatile memory that stores position information on the date indicator, a receiver that is a time information acquirer that externally acquires time information, and a control section that outputs a drive signal to the date indicator motor and stores the position information on the date indicator in the display position storage whenever the date indicator motor activated with the drive signal drives the date indicator.

First claim

What is claimed is:

1. An electronic timepiece comprising:
a dial with a display part including a calendar window;
an analog display member including a calendar wheel, the analog display member being movable with respect to the dial and displayed at the display part of the dial;
a driver that drives the analog display member;
a nonvolatile memory that stores position information of the analog display member;
a time information acquirer that externally acquires time information;
a control section that outputs a drive signal to the driver and stores the position information on the analog display member in the nonvolatile memory whenever the driver activated with the drive signal drives the analog display member;
an external operation member that activates the driver via the control section to drive the analog display member for position adjustment; and
a position detector that detects that the analog display member has moved to a preset reference position,
wherein the control section causes the nonvolatile memory to store adjustment information on an amount of the position adjustment performed through the external operation member, the adjustment information being indicative of a position deviation between the preset reference position and the display part of the dial, and
wherein the control section outputs the drive signal to the driver to drive the analog display member with respect to the dial by the amount of the position adjustment based on the adjustment information stored in the nonvolatile memory to align an indicator of the analog display member relative to the display part of the dial while the indicator of the analog display member is being displayed at the display part of the dial in response to the position detector detecting that the analog display member has moved to the preset reference position to display the indicator of the analog display member at the display part of the dial.

2. The electronic timepiece according to claim 1 ,
wherein the analog display member, the position information of which is stored in the nonvolatile memory, is an analog display member that displays information other than a second, a minute, or an hour.

3. The electronic timepiece according to claim 1 ,
wherein the driver is a stepping motor, and
the control section stores the position information on the analog display member and polarity information on the drive signal outputted to the stepping motor in the nonvolatile memory.

4. The electronic timepiece according to claim 1 ,
wherein the control section overwrites reference position information stored in the nonvolatile memory when the reference position adjustment of the analog display member is performed through the external operation member.

Assignees

• Seiko Epson Corp

Inventors

• Miyahara Fumiaki

Classifications

• G04C17/0066 Primary

  electromagnetically driven, e.g. intermittently (clocks incorporating a stepping motor G04C3/14) · CPC title

• G04D99/00

  Subject matter not provided for in other groups of this subclass · CPC title

• G04R60/14 Primary

  specific to electromechanical timepieces, e.g. moving parts thereof · CPC title

• G04R20/12

  Decoding time data; Circuits therefor · CPC title