Electronic timepiece

• US 9,696,689 B2
• Filed: 06/29/2015
• Issued: 07/04/2017
• Est. Priority Date: 07/18/2014
• Status: Active Grant

• Current Assignee: Casio Computer Company Limited
• Original Assignee: Casio Computer Company Limited
• Inventors: Hasegawa, Kosuke
• Primary Examiner(s): Johnson, Amy Cohen
• Assistant Examiner(s): WICKLUND, DANIEL PM
• Application Number:
  US14/754,454
• Publication Number:
  US 20160018792A1
• Time in Patent Office: 736 Days
• Field of Search: 368 47, 368 21
• CPC Class Codes: G04G 9/0076 in which the time in another time-zone or in another city can be displayed at will
• CPC Class Codes: G04R 20/00 Setting the time according to the time information carried or implied by the radio signal
• CPC Class Codes: G04R 20/02 the radio signal being sent by a satellite, e.g. GPS

Abstract

An electronic timepiece including: a clocking unit which counts current date and time; a daylight saving time application unit which applies daylight saving time information corresponding to positional information to the date and time counted by the clocking unit; a radio wave reception unit which receives radio waves including daylight saving time implementation information of a predetermined area; a daylight saving time information acquisition unit which acquires the daylight saving time implementation information from the received radio waves; a storage unit in which a daylight saving time implementation rule of each area in the world is stored in advance; and an information selection unit which selects, as the daylight saving time information, one of the daylight saving time implementation information and the daylight saving time implementation rule corresponding to a current position on the basis of the current position and the daylight saving time implementation information.

Claims

1. An electronic timepiece comprising:

a clocking unit which counts current date and time;

a daylight saving time application unit which applies daylight saving time information corresponding to positional information to the date and time counted by the clocking unit;

a standard wave receiving unit which receives standard radio waves for correcting time, the standard radio waves including date and time information and daylight saving time implementation information of a predetermined area and being transmitted in a Low Frequency band;

a daylight saving time information acquisition unit which acquires the daylight saving time implementation information from the received radio waves;

a storage unit in which a daylight saving time implementation rule, standard wave receivable area information, and priority information are stored in advance for each of a plurality of areas of the world divided in advance, the standard wave receivable area information indicating whether a standard wave frequency receivable by the standard wave receiving unit is broadcast in the area, and the priority information indicating whether the daylight saving time implementation information included in the standard radio waves is to be selected with priority over the daylight saving time implementation rule in the area;

a positioning unit which receives radio waves from a satellite and measures a current position;

an operation unit which receives an operation for inputting a current position; and

an information selection unit which;

determines whether the current position measured by the positioning unit or the current position input from the operation unit is in an area in which the standard wave frequency is receivable by the standard wave receiving unit based on the standard wave receivable area information stored in the storage unit,

if the current position is not in the area in which the standard wave frequency is receivable, selects the daylight saving time implementation rule corresponding to the current position as the daylight saving time information,

if the current position is in the area in which the standard wave frequency is receivable, determines whether the current position measured by the positioning unit or the current position input from the operation unit is in an area in which the daylight-saving time implementation information is selected with priority over the daylight saving time implementation rule based on the priority information,

if the current position is not in the area in which the daylight saving time implementation information is selected with priority over the daylight saving time implementation rule, selects the daylight saving time implementation rule corresponding to the current position as the daylight saving time information, and

if the current position is in the area in which the daylight saving time implementation information is selected with priority over the daylight saving time implementation rule, selects, as the daylight saving time information, the daylight saving time implementation information acquired by the daylight saving time information acquisition unit within a predetermined period of time,

wherein the daylight saving time application unit applies the selected daylight saving time information to the date and time.

2. The electronic timepiece according to claim 1, wherein the priority information is determined to indicate selecting the daylight saving time implementation information with priority for an area where daylight saving time is implemented during a same period of time as a period of time indicated by the daylight saving time implementation information included in the radio waves which are receivable by the standard wave receiving unit.

3. The electronic timepiece according to claim 2, wherein the operation unit further receives an operation for changing the priority information in the storage unit.

4. The electronic timepiece according to claim 3, wherein the information selection unit newly selects the daylight saving time information based on the current position when the positioning unit measures the current position.

5. The electronic timepiece according to claim 2, wherein the information selection unit newly selects the daylight saving time information based on the current position when the positioning unit measures the current position.

6. The electronic timepiece according to claim 1, wherein the operation unit further receives an operation for changing the priority information in the storage unit.

7. The electronic timepiece according to claim 6, wherein the information selection unit newly selects the daylight saving time information based on the current position when the positioning unit measures the current position.

8. The electronic timepiece according to claim 1, wherein the information selection unit newly selects the daylight saving time information based on the current position when the positioning unit measures the current position.