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An apparatus and method for calculating and displaying local time for a plurality of cities in the world. The apparatus includes a memory for storing Greenwich mean time (GMT) information for each of the plurality of cities. The apparatus sets a reference time and counts the time that elapses from when the reference time is set. The apparatus calculates a local time of a city selected by a user, which is based on a difference between the GMT of the selected city and the GMT of a present location of the apparatus, the reference time and the counted elapsed time. The reference time may be either a time set by the user or a system time acquired from a signal generated from a remote system.

Inventor: Hye-Young Lee
Original Assignee: Samsung Electronics Co., Ltd.
Primary Examiner: Erika A. Gary
Attorney: Dilworth & Barrese LLP
Current U.S. Classification: 455/566; 368/13; 368/21; 455/418

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Citations

Cited PatentFiling dateIssue dateOriginal AssigneeTitle
US4217653Jun 12, 1978Aug 12, 1980Canon Kabushiki KaishaElectronic apparatus for time calculation
US4245323Jan 26, 1979Jan 13, 1981Copal Co., Ltd.Electronic calculator with time display function
US4779247Apr 10, 1987Oct 18, 1988Seiko Instruments Inc.World clock
US5363377Apr 9, 1993Nov 8, 1994U.S. Philips CorporationCommunications system and receiver for use therein which indicates time based on a selected time message signal from a central station
US5375018Jul 17, 1991Dec 20, 1994Klausner Patent TechnologiesLocation acquisition and time adjusting system
US5375104Mar 25, 1993Dec 20, 1994NEC CorporationMobile terminal equipment
US5448532Sep 30, 1991Sep 5, 1995Sharp Kabushiki KaishaElectronic world clock device for indicating times for various spots in the world
US5528558Aug 12, 1994Jun 18, 1996International time indicating system
US5655218Feb 16, 1996Aug 5, 1997Motorola, Inc.Radiotelephone communication unit displaying chronological information
US5708628Aug 26, 1996Jan 13, 1998Universal time equipment
US5907523Oct 2, 1997May 25, 1999Multi-time-zone timepiece display
US5920824Sep 2, 1997Jul 6, 1999International Business Machines CorporationMethod for computing current time on a cellular mobile system
US6108277Jun 15, 1998Aug 22, 2000Celestial timepiece assembly
US6223050Dec 9, 1997Apr 24, 2001Bellsouth Intellectual Property Management CorporationSystem and method for automatically setting a remote timepiece with the correct time

Referenced by

Citing PatentFiling dateIssue dateOriginal AssigneeTitle
US7823090Jul 11, 2008Oct 26, 2010Kabushiki Kaisha ToshibaInformation-processing apparatus and clock information display control method for use in the apparatus
US7881748Dec 22, 2009Feb 1, 2011AT&T Mobility II LLCNetwork identity and timezone (NITZ) functionality for non-3GPP devices
US8054820Dec 14, 2006Nov 8, 2011Samsung Electronics Co., LtdMethod and apparatus for synchronizing time information in a mobile communication terminal
US8132018Jun 30, 2005Mar 6, 2012Intel CorporationTechniques for password attack mitigation

Claims

1. An apparatus for displaying local time information, comprising:

means for storing Greenwich mean time (GMT) information for each of a plurality of cities;

means for receiving a reference time from a signal received from a remote system;

means for counting a duration of time that elapses from when said reference time is acquired;

means for selecting at least one of said plurality of cities and automatically calculating a local time of said selected city, said local time being based on a difference between the GMT of said selected city and the GMT of a present location of said apparatus, said reference time and said elapsed time; and
means for outputting said local time.

2. The apparatus of claim 1, wherein said apparatus is a mobile telephone.

3. The apparatus of claim 2, wherein said reference time is a system time acquired from a sync channel message received by said mobile cellular phone from a base station of a CDMA (Code Division Multiple Access) cellular system.

4. In an apparatus having a display and a memory for storing Greenwich mean time (GMT) information for each of a plurality of cities, a method for generating local time information, comprising the steps of:

receiving a reference time from a signal received from a remote system;

counting a time which elapses from said acquiring of said reference time;

selecting at least one of said plurality of cities;

automatically calculating a local time of said selected city based on the difference between the GMT of said selected city and the GMT of a present location of said apparatus, said reference time and said elapsed time; and
displaying said calculated local time.

5. The method of claim 4, further comprising the step of displaying a message to set a reference time if said step of setting a reference time does not occur.

6. The method of claim 4, wherein said step of selecting includes the substeps of:

displaying a list of said plurality of cities; and

scrolling through said list to select a desired one of said plurality of cities.

7. The method of claim 4, wherein said apparatus is a mobile telephone.

8. The method of claim 7, wherein said reference time is a system time acquired from a sync channel message received from a base station of a CDMA cellular system.

Drawings