KR100251638B1 - Global time display and control device and method of digital mobile phone - Google Patents

Abstract

PURPOSE: An apparatus and a method for controlling display of world time on a digital mobile are provided by which a user can confirm the current time of any city of any country even though the user do not have a watch. CONSTITUTION: An apparatus for controlling display of world time on a digital mobile includes a means for setting and storing a system time detected from a synchronous channel message received from the base station of a CDMA system as a reference time, and a means for initializing counting for lapse of time right after setting of the reference time. The apparatus further has a memory(112) for storing Greenwich times of cities of countries, a controller(111) for calculating the time of a city selected by a user based on the Greenwich time of the city, the reference time and the counted time, and a display(123) for displaying the calculated time.

Description

World time display control device and method of digital portable telephone

TECHNICAL FIELD The present invention relates to digital portable telephones, and more particularly, to an apparatus and method for controlling to display world time.

The development of advanced scientific and industrial societies is driving the demand for digital handheld phones.

In addition, there is a great interest in improving economics and efficiency by allowing a single device to perform a combination of functions.

Digital handheld phones not only eliminate the local limitations of wired terminals, but also have significant time effects on their mobility. Therefore, it is very inefficient to use it only for its own functions.

On the other hand, those who work internationally or in foreign affairs need to know their views quite often, and it is very cumbersome to calculate the time difference each time. Also, since you may not know all the time differences for cities in each country, it is more cumbersome to look at a separate table and then calculate it. To solve this problem, even if a separate clock corresponding to the cities of each country is limited to only a few.

It is therefore an object of the present invention to provide an apparatus and method for controlling the display of the world time in a digital portable telephone.

1 is a block diagram showing the configuration of a digital portable telephone to which the present invention is applied.

2A and 2B are flowcharts illustrating a world time display control process according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, many specific details such as the specific number of bits and the like appear, which are provided to help a more general understanding of the present invention, and the present invention may be practiced without these specific details. It is self-evident to those who have knowledge. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a block diagram showing the configuration of a digital portable telephone to which the present invention is applied.

The controller 111 collectively controls the overall operation of the digital portable telephone.

In addition, the control unit 111 recognizes the selection of any city in the world through the user interface as a setting of the world time display mode by the user, and uses the selected city by using the Greenwich Mean Time, the reference time, and the time counted up to that time. Calculate your current time. The first memory 112 stores programs, initial service data, and Greenwich Mean Time for cities around the world. The first memory 112 may be configured as a flash memory. The second memory 113 is a memory that temporarily stores data generated during the operation of the digital portable telephone, that is, system time, user setting time, and the like. The second memory 113 may be configured as a RAM.

The third memory 113-1 is a memory for storing important variables required for the digital portable telephone to operate or a telephone number input by the user, and may be configured as an EEPROM. The key input unit 114 generates key data for performing various mode settings of the digital portable telephone, selecting a city for displaying a time, or dialing, and outputting the key data to the controller 111. The logic unit 115 exchanges data with the control unit 111 and outputs control data for controlling their operation to each part of the digital portable telephone. The data processor 116 processes the received data RXD output from the RF receiver 120, applies the signal to the controller 111, and processes the signal RXD output from the controller 111 to output the signal to the RF transmitter 121. The data processor 116 may use a digital signal processor.

The duplexer 122 is connected to an antenna to separate a transmission RF signal and a reception RF signal. The RF receiver 120 is connected to the duplexer 122 and outputs the received RF signal by frequency conversion and demodulation. The received audio signal RXA output from the RF receiver 120 is transmitted to the audio receiver 117, and the received data RXD is transferred to the data processor 116. The audio receiver 117 inputs the received audio signal RXA to reproduce an audio signal. The audio transmitter 118 inputs an audio signal to generate a transmission audio signal TXA. The RF transmitter 121 modulates the transmit audio signal TXA and the transmit data TXD output from the data processor 116 into a transmittable form and transmits the modulated data to the duplexer 122. The frequency synthesizing unit 119 generates a frequency synthesizing signal for allocating the reception channel of the RF receiver 120 and the transmission channel of the RF transmitter 121 by the control data of the logic unit 115. The display unit 123 displays the world time under the control of the control unit 111. The control unit 111 includes a predetermined timer, from the base station of the code division multiple access system.

The timer is operated to check a later time elapse based on a received system time or a time manually set by a user.

2A and 2B are flowcharts illustrating a world time display control process of a digital portable telephone according to an embodiment of the present invention.

Referring to FIG. 2A, when a user inputs a power key to supply power to the digital portable phone, the control unit 111 detects this and initializes various variable values required for the digital portable phone to operate in step a. Do this. The controller 111 checks whether the pilot channel is acquired in the pilot channel acquisition mode for communication with the base station in step b. In this case, if the pilot channel cannot be acquired, the process proceeds to step c and it is checked whether all timeouts allocated to the pilot channel acquisition have elapsed. If it is determined that the time limit has not elapsed, the process returns to step b to perform an operation for obtaining a pilot channel again. On the other hand, if the timeout period has elapsed, that is, if the pilot channel is not acquired within the specified time, the process returns to step a.

If the pilot channel is acquired within the time specified in step b, the process proceeds to step d to switch to the synchronization channel acquisition mode and checks whether a synchronization channel message is received from the base station. In this case, if it is determined that the synchronization channel message has not been received, the process proceeds to step e and it is checked whether all timeouts allocated for the synchronization channel message have elapsed. If the timeout has not elapsed as a result of the check, the process returns to step d and performs an operation for receiving a sync channel message again.

On the other hand, if the timeout period has elapsed, that is, if the synchronization channel message has not been received within the specified time, the process returns to step a.

When the synchronization channel message is received without error within the time specified in step d, the flow proceeds to step f to obtain and store a system time and various variable values (hereinafter, referred to as system time) from the synchronization channel message. do. In practice, the field of the sync channel message includes time-related information such as 36-bit system time (SYS_TIME), the number of leap seconds since the start of the system time (LP_SEC), and the difference between the system time and the local time (LTM_OFF).

After that, the transition to the idle state in step g. In the idle state, the control unit 111 monitors a paging channel and checks whether the user makes a call or uses various other functions and controls the corresponding operation to be performed. In step h, if the user time is set through the user interface, and if the time is set, the time is increased in step I. If the user time is not set, check whether the system time is set in step j. If the time is set, increase the system time in step k. If the system time is not set, it is checked in step 1 whether the user time setting mode is selected by the user. If the user time setting mode is selected as a result of the check, the user transitions to this mode and proceeds to step m to set a time to be used as a reference by performing a user time setting subroutine.

Referring to FIG. 2B, if it is not the user time setting mode, it is checked in step n whether the world time display mode is selected by the user's selection. If the world time display mode is selected as the result of the check, the mode transitions to this mode and it is checked in step 0 whether the system time or the user time is set. If both times are not set as a result of the check, the display unit 123 causes the display unit 123 to display an error message for setting the system time or the user time in step p, and then returns to step g described above to switch to the idle state. On the other hand, if the system time is acquired from the synchronization channel message or the user's time is set, it is checked whether the user selects the city for which the current time is displayed in step q. If the desired city is selected as a result of the confirmation, the display unit 123 controls the display unit 123 to calculate and display the current time of the city according to the Greenwich Mean Time and the system time or the user time of the city.

If you do not select the city you want to see the event in step r to check whether the user wants to exit the world time display mode is performed. At this time, if it is determined that the end is desired, the process returns to the above-described step g to switch to the idle state, and if it is determined that the end is not desired, the process returns to the q step.

After displaying the time of the city selected in step s, it is checked whether there is an input of a scroll key in step t. When the scroll key is input, in step u, the world time of the next city is calculated and displayed in the list of cities displayed in the world time display mode, and the process returns to step t. If the scroll key is not input, in step v, the user checks whether the user wants to exit the world time display mode. At this time, if it is determined that the end is desired, the process returns to the above-described step g to switch to the idle state, and if it is determined that the end is not desired, the process returns to the above-described step t to check whether there is a scroll key input. By repeating the steps t to v, it is possible to check the time of the cities of the countries listed in the list.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

The present invention as described above is convenient because it is possible to check the current time of any city in the world with a portable terminal without having a separate clock.

Claims (2)

A digital portable telephone, comprising: means for setting and storing a system time detected from a synchronization channel message received from a base station of a code division multiple access system as a reference time, and initiating a count of elapsed time immediately after setting of the reference time. Means for storing Greenwich Mean Time for cities of the world, and Greenwich Mean Time for any city selected by the user among the cities of the world, the reference time and the counted time. And a means for calculating and means for displaying the calculated time. A method for controlling the world time display of a digital portable telephone having a display unit and a memory for storing Greenwich Mean Time for cities around the world, the method comprising: acquiring a pilot channel from a base station of a code division multiple access system when power is supplied; A first process of receiving a channel message and detecting a system time from the sync channel message and setting the system time as a reference time, a second process of starting a count of time elapsed from this time immediately after setting the reference time, and a user interface; A third process of detecting a setting by the world time display mode through selection of a city at random through the world, and a fourth time of calculating a current time of the selected city by using Greenwich Mean Time, the reference time, and the time counted up to that time of the selected city And a fifth process of displaying the calculated time. How to feature.

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