JPH0519071A - Clock device - Google Patents

Abstract

PURPOSE:To obtain a clock device which is easy to set at desired time and displays the UTC time. CONSTITUTION:A clock circuit 41 conducting time count on the basis of local standard time, a display means 50 for displaying the time, a memory 24 holding data on a time difference from the universal standard time, and a processing circuit 20, are provided. In the processing circuit 20, data on the local standard time counted by the clock circuit 41 and the data on the time difference held by the memory 24 are subjected to computation and thereby data on the universal standard time are obtained. These data are supplied to the display means 50 and the universal standard time is displayed in the display means 50. The local standard time counted by the clock circuit 41 is altered by a first key Kt and keys Kp and Km. By a second key Kd and the keys Kp and Km, the data on the time difference held in the memory 24 are altered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a timepiece device for displaying the world standard time.

[0002]

2. Description of the Related Art Shortwave broadcasting schedules are designed to make the shortwave broadcasting available anywhere in the world.
UTC time (World Standard Time, Greenwich Mean Time) is used. Therefore, when a clock circuit is provided in a receiver for shortwave broadcasting, it is very convenient if time display and timer reception (standby reception) can be performed by UTC time.

[0003]

However, the correct local standard time (local time) can be easily known by radio or telephone, but there are not many means for confirming the correct UTC time.

For this reason, when a clock circuit is provided in the receiver for shortwave broadcasting to display the UTC time, it is difficult to set the clock circuit to the correct UTC time.

The present invention is intended to solve such a problem.

[0006]

By the way, when the time difference between the local standard time and the UTC time, that is, the time difference is obtained, this time difference becomes a constant value peculiar to each region, for example, +9 hours in Japan.

Therefore, when the local standard time and the time difference are displayed, if it is confirmed that these two are correct, U
The TC time can also be the correct time.

The present invention focuses on such a point, and the UT
The C time can be adjusted to the correct time.

That is, in the present invention, when the reference numerals of the respective parts correspond to the embodiments described later, the clock circuit 41 for measuring the time in the local standard time and the display means 50 for displaying the time.
And the memory 24 that holds the time difference data with respect to the world standard time, the local standard time data that is being clocked by the clock circuit 41, and the time difference data that is held in the memory 24, and the world standard time data is output. Processing circuit 20 for
1st to change the local standard time which clock circuit 41 keeps time
Keys Kt, Kp, Km and second keys Kd, Kp, Km for changing the time difference data held in the memory 24.
And.

Then, the world standard time data output from the processing circuit 20 is supplied to the display means 50 to display it.
Is to display the world standard time.

[0011]

Even if the time setting of the clock circuit 41 is performed in the local standard time, the time is displayed in the world standard time. Therefore, the time is displayed in the world standard time, and the time adjustment is easy.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numerals 1 to 8 represent synthesizer type receiving circuits, 1 is an antenna, and 2 is an electronic tuning type antenna tuning circuit. Then, the tuning circuit 2 extracts the AM broadcast wave signal Sr having the target frequency fr, the signal Sr is supplied to the mixer circuit 4 through the high frequency amplifier 3, and the frequency fo from the VCO 11 is fo = fr +450 [ kHz] (i) The oscillation signal So of (i) is taken out, this signal So is supplied to the mixer circuit 4 as a local oscillation signal, and the signal Sr is frequency-converted into an intermediate frequency signal (intermediate frequency is 450 kHz).

Then, this intermediate frequency signal is supplied to the AM detection circuit 6 through the intermediate frequency amplifier 5 to extract an audio signal, and this signal is supplied to the speaker 8 through the low frequency amplifier 7.

At this time, the VCO 11 has the circuit 1
The PLL 10 is configured with 2 to 15. That is, the signal So from the VCO 11 is supplied to the variable frequency dividing circuit 12 and divided into a frequency of 1 / N, and the frequency divided signal is supplied to the phase comparison circuit 13 and the oscillation circuit 14
An oscillation signal Sp having a reference frequency of 5 kHz is extracted from the signal source, the signal Sp is supplied to the comparison circuit 13, and the comparison output is supplied to the VCO 11 as its control voltage through the low pass filter 15. Further, the output voltage of the filter 15 is supplied to the tuning circuit 2 as a tuning voltage.

Therefore, in the steady state, the frequency-divided signal from the frequency-dividing circuit 12 and the oscillation signal So have the same frequency. Therefore, the frequency fo of the oscillation signal So at this time is fo = 5 [kHz] × N It becomes (ii). At this time, equation (i) holds.

Therefore, Therefore, when the division ratio N is between 411 and 6089, it is "1".
The reception frequency fr is 1605 kHz to 299
It changes between 95 kHz at intervals of 5 kHz and in accordance with the division ratio N.

The frequency dividing ratio N is calculated by the frequency dividing circuit 1 by the microcomputer 20 for system control.
Set to 2.

That is, in the microcomputer 20, 21 is, for example, a 4-bit CPU, 22 is a ROM in which the processing routines shown in FIGS. 2 to 6 are written, 23 is a work area RAM, and 24 is frequency data and time difference. Of the memory 22 to
24 is connected to the CPU 21 through a system bus 29. In this case, the memory 24 is a non-volatile memory that can electrically erase and write data.
That is, it is a so-called EEPROM (product name) or a memory backed up by a battery.

Further, 31 and 32 are key interfaces, 33 is an output port, 41 is a clock circuit, and 42 is an LCD.
A driver, 50 indicates an LCD, and these circuits 31 to 3
3, 41 and 42 are also connected to the CPU 21 via the bus 29. In this case, the clock circuit 41 clocks the current time in local standard time, and the LCD 50 digitally displays the local standard time clocked by the clock circuit 41 or the UTC time converted from this local standard time. To do.

The key interface 31 has
The numeric keys Kn, the enter key Ke, and the registration key Kr are connected, and the key interface 32 includes a time key Kt, a time difference key Kd, a plus key Kp, a minus key Km, and a display switching key Kc. Connected.

In this case, the numeric key Kn and the enter key K
The e key and the execution key Kc are keys for presetting a frequency and selecting a channel. Further, the time key Kt is a key for permitting input of local standard time, the time difference key Kd is a key for permitting input of time difference, and the keys Kp, Km are keys for adjusting the local standard time or time difference. The key Kc is a key for switching the time display between local standard time and UTC time. These keys Kn ~
Each Kc is composed of a non-lock type push switch.

Then, the clock circuit 41 interrupts the CPU 21 every 1/10 second, for example, and at the time of this interrupt, the CPU 21 executes the display processing routine 200 of FIG. 6, and the LCD 50 displays, for example, as shown in FIG. The UTC time or local standard time is displayed on.

That is, at the time of interruption, the processing of the CPU 21 starts from step 201 of the routine 200,
Next, at step 202, the time adjustment flag LCLF is checked, and when LCLF = “0”, the process proceeds from step 202 to step 203, and this step 20
3, the time display mode flag UTCF is checked, and when UTCF = "1", the process proceeds from step 203 to step 204.

Then, in step 204, the local standard time data indicated by the clock circuit 41 is converted into UTC time data. This conversion is realized by subtracting the time difference data held in the memory 24 from the local standard time data indicated by the clock circuit 41. Subsequently, in step 205, the UTC time data is supplied to the driver 42, and as shown in the upper side of FIG.
The current UTC time is digitally displayed on the LCD 50.
At this time, the time difference data in the memory 24 is also supplied to the driver 42, and the time difference is digitally displayed, for example, in the lower right corner of the LCD 50. FIG. 7 shows the case where the UTC time is 3:30 and the time difference is +9 hours.

Then, the processing of the CPU 21 is step 2
Then, the routine 200 is terminated.

In step 202, LCLF =
When the value is "1", the process proceeds from step 202 to step 206. In this step 206, the local standard time data indicated by the clock circuit 41 is supplied to the driver 42, and as shown in the lower side of FIG. The local standard time of is displayed digitally. At this time, the time difference data is also supplied to the driver 42, and the time difference is digitally displayed at the lower right of the LCD 50. In Figure 7, local standard time is 12:00
It shows the case where the time difference is +9 hours at 30 minutes.

The processing of the CPU 21 is step 2
Then, the routine 200 is terminated.

Further, in step 203, UTCF =
Even when it is "0", the process proceeds from step 203 to 206, and the local standard time and the time difference are digitally displayed on the LCD 50.

Thus, the LCD 50 has a flag LCLF,
According to UTCF, UTC time or local standard time is displayed, and the time difference is also displayed.

The processing such as channel selection and time adjustment is performed by C
The PU 21 executes the routine 100 shown in FIGS. 2 to 5 to realize the following.

<< Key Input >> The processing of the CPU 21 starts from step 101 of the routine 100 and proceeds to step 1
In 02, it is checked whether or not any of the keys Kn to Kc has been pressed. If no key has been pressed, the process proceeds from step 102 to step 103, in which the time adjustment flag LCLF is reset to "0". To be done. Subsequently, in step 104, the time adjustment amount counter CNTR is set to "30 minutes", and thereafter, the processing proceeds to step 109, and this routine 100
To finish.

However, when any of the keys Kn to Kc is pressed, this is detected in step 102, and the process proceeds from step 102 to step 111,
In step 111, it is checked whether or not the pressed key is the display switching key Kc. If it is not the switching key Kc, the process proceeds from step 111 to step 121.

Thereafter, the same processing as in step 111 is executed, it is checked in step 121 whether the pressed key is the plus key Kp, and in step 131, the pressed key is the minus key Km.
Is checked, and it is checked in step 141 whether the pressed key is the key Kn, Ke or Kr.

Thus, in the above steps, when a key is pressed, which of the pressed keys is
Each is checked.

When the << Known and preset >> key Kn, Ke or Kr is pressed, this is detected in step 141, and the process proceeds from step 141 to step 142. Then, in step 142, the keys Kn, Ke
, Kr corresponding to the pressed key, the following processing is performed.

That is, while pressing the enter key Ke, the numerical key Kn is used to indicate a frequency value, for example, "15160".
Is input, the numerical value (frequency) input by the numeric key Kn is converted into the frequency division ratio N, and this frequency division ratio N is set in the frequency division circuit 12 through the port 33. For example, when the numerical value “15160” is input, this is converted into the frequency division ratio “3122”, and this frequency division ratio “3122” is calculated.
Set to 2.

Therefore, the reception frequency is the frequency dividing circuit 12
The frequency corresponding to the frequency division ratio N set to
The frequency is entered with the numeric key Kn. In the present case, the frequency is "15160 kHz".

If any of the numeric keys Kn is pressed while pressing the registration key Kr, the memory 2
The frequency division ratio N of the broadcasting station selected at this time is written in the address corresponding to the pressed key among the four. Therefore, by this key operation, an arbitrary frequency can be preset in an arbitrary key of the numeric keys Kn.

Further, when any one of the numeric keys Kn is pressed, the division ratio N written therein is read from the address corresponding to the pressed key in the memory 24, and this reading is performed. The outputted frequency dividing ratio N is set in the frequency dividing circuit 12. Therefore, the preset frequency can be selected by the numeric key Kn.

As described above, frequency presetting and channel selection are performed by the numerical keys Kn, enter key Ke or registration key Kr.

<< Switching of Display >> This is a case where the display on the LCD 50 is switched between UTC time and local standard time, as shown in FIG. 7, for example. Then, in this case, the display switching key Kc is pressed.

Then, it is detected in step 111 that the key Kc is pressed, and the process proceeds from step 111 to step 112. In this step 112,
The time display mode flag UTCF is inverted, and then the process proceeds to step 109.

Then, in step 103,
Since LCLF = “0”, every time the display switching key Kc is pressed, the routine 200 switches the display on the LCD 50 between UTC time and local standard time, as shown in FIG. 7, for example.

<< Time adjustment in the direction of advancing local standard time >>
This is the case where the local standard time of the clock circuit 41 and the LCD 50 is advanced to adjust the time. Then, in this case, the plus key Kp is pressed while the time key Kt is being pressed.

Then, it is detected in step 121 that the key Kp has been pressed, and the process proceeds to step 121.
The process proceeds from step 122 to step 122. In this step 122, it is checked whether the time difference key Kd is pressed. In this case, since it is not pressed, the process proceeds to step 1
From 22 to step 123, whether or not the time key Kt is pressed is checked in this step 123. In this case, since it is pressed, the process proceeds from step 123 to step 124, and this step 124
At, LCLF is set to "1". Therefore,
Thereafter, the routine 200 causes the LCD 50 to display the local standard time.

Subsequently, the process proceeds to step 125, in which the time (local standard time) indicated by the clock circuit 41 is advanced by "1 minute", and in step 126, the time adjustment amount counter CNTR is set to "1". 1
Incremented by "minutes". In this case, step 1
Since CNTR is set to "30 minutes" by 04, CN
TR = "31 minutes". Then, in step 127, it is checked whether CNTR ≥ 60 minutes, and the CNTR
When <60 minutes, the process proceeds from step 127 to step 109, and the routine 100 ends.

Therefore, when the plus key Kp is pressed while pressing the time key Kt, the local standard time is displayed on the LCD 50 and the clock circuit 4 is displayed each time the key Kp is pressed.
The timing of 1 and the display on the LCD 50 are advanced by "1 minute". At this time, the counter CNTR also starts from "30 minutes" and is incremented by "1 minute".

Thus, by pressing the plus key Kp while pressing the time key Kt, the clock circuit 41 can be set to the correct local standard time, and the LCD 50 can display the correct local standard time.

In step 127, CNTR ≧ 60
If the time is minute, the process proceeds from step 127 to step 12
8. In step 128, CNTR = 0 is reset, and then in step 129, the memory 2
The time difference data of 4 is incremented by "1 hour", and then the process proceeds to step 109.

Therefore, when the time adjustment is performed by pressing the time key Kt and the plus key Kp to adjust the time, if the correction amount exceeds 30 minutes, the time difference data in the memory 24 is also corrected in units of one hour. For example, when moving from Tokyo to Sydney, the time difference is +1 hour, so the key Kt,
Kp advances the local standard time by one hour, but at this time, the time difference data in the memory 24 also automatically increases by one hour.

When the plus key Kp is pressed and the time key Kt is not pressed, the process proceeds from step 123 to step 109.

<< Time Adjustment in the Direction of Delaying Local Standard Time >> This is a case where time adjustment is performed by delaying the local standard time indicated by the clock circuit 41. And in this case,
While pressing the time key Kt, press the minus key Km.

Then, it is detected in step 131 that the key Km has been pressed, and the process proceeds to step 131.
From step 132, it is checked in step 132 whether the time difference key Kd is pressed. In this case, since it is not pressed, the process proceeds to step 1
From 32 to step 133, whether or not the time key Kt is pressed is checked in this step 133. In this case, since it is pressed, the process proceeds from step 133 to step 134, and this step 134
At, LCLF is set to "1". Therefore,
Thereafter, the routine 200 causes the LCD 50 to display the local standard time.

Subsequently, the process proceeds to step 135, in which the time (local standard time) indicated by the clock circuit 41 is delayed by "1 minute", and further, in step 136, the time adjustment amount counter CNTR is set. "1
Decremented by "minutes", then step 137
At, it is checked whether CNTR <0 minutes. If CNTR ≧ 0 minutes, the process proceeds from step 137 to step 109, and the routine 100 is ended.

Therefore, when the minus key Km is pressed while the time key Kt is being pressed, the local standard time is displayed on the LCD 50, and each time the key Km is pressed, the clock circuit 41 clocks and the LCD 50 displays "1 minute". Are delayed one by one. At this time, the counter CNTR also starts from "30 minutes" and is decremented by "1 minute".

Thus, by pressing the minus key Km while pressing the time key Kt, the clock circuit 41 can be set to the correct local standard time and the LCD 50 can display the correct local standard time.

In step 137, CNTR <0
If it is minutes, the process proceeds from step 137 to step 13
8. In this step 138, CNTR = 59 minutes is set, and then in step 139, the memory 24
The time difference data is decremented by "1 hour",
Thereafter, the process proceeds to step 109.

Therefore, when the minus key Km is pressed while pressing the time key Kt,
When the correction amount exceeds 30 minutes, the time difference data in the memory 24 is also corrected in 1-hour units. For example, when moving from Tokyo to Beijing, the time difference is -1 hour, so the keys Kt, K
The local standard time is delayed by 1 hour depending on m, but at this time, the time difference data in the memory 24 is also automatically reduced by 1 hour.

When the minus key Km is pressed,
When the time key Kt is not pressed, the process proceeds from step 133 to step 109.

<< Change of direction to increase time difference >>
This is a case where the time difference data in the memory 24 is increased. In this case, the plus key Kp is pressed while the time difference key Kd is being pressed.

Then, it is detected in step 121 that the key Kp has been pressed, and the process proceeds to step 121.
From step 122 to step 122, it is checked in step 122 whether the time difference key Kd is pressed. In this case, since it is pressed, the process proceeds from step 122 to step 129 and this step 129 is executed.
At, the time difference data in the memory 24 is incremented by “1 hour”, and then the process proceeds to step 109.

In this way, when the plus key Kp is pressed while the time difference key Kd is being held, the time difference data of the memory 24 and L
It can be changed to increase the time difference displayed on the CD 50.

To know the time difference, for example, a world map showing the time difference may be prepared on the back surface of the receiver.

<< Change of direction to reduce time difference >>
This is a case where the time difference data in the memory 24 is reduced. Then, in this case, the minus key Km is pushed while holding the time difference key Kd.

Then, it is detected in step 131 that the key Km has been pressed, and the process proceeds to step 131.
To step 132, and in step 132, it is checked whether or not the time difference key Kd is pressed. In this case, since it is pressed, the process proceeds from step 132 to step 139, and this step 139 is executed.
At, the time difference data in the memory 24 is decremented by “1 hour”, and then the process proceeds to step 109.

In this way, if the minus-Km is pressed while pressing the time difference key Kd, the time difference data of the memory 24 and L
The time difference displayed on the CD 50 can be reduced.

<< Summary >> As described above, since the UTC time is displayed on the LCD 50, it is very convenient when receiving a shortwave broadcast. The UTC time is calculated by the routine 200 from the data of the local standard time measured by the clock circuit 41 and the time difference of the memory 24, and the local standard time can be easily calculated by the radio receiver itself or by telephone. Since the time difference can be known and the time difference can be easily known from a map or the like, the correct UTC time can be displayed easily and surely.

Although the routine 200 is executed by interruption in the above description, the routine 200 can be executed subsequent to the routine 100. Also, UT
The time difference in India is +5 hours 30 minutes and the time difference in Iraq is +3 hours 30 minutes with respect to C time.
The time difference is set in units of 30 minutes, but it is possible to correspond to these.

[0069]

According to the present invention, the LCD 50 has a UT.
Since C time is displayed, it is very convenient when receiving short wave broadcasting.

In that case, in particular, according to the present invention, the displayed UTC time is
Local standard time and memory 24 for clocking the clock circuit 41
It is calculated from the time difference data, and the local standard time can be easily known from this radio receiver itself or by telephone, and the time difference can also be easily found from the map, etc., so the correct UTC time can be obtained. It can be displayed easily and surely.

[Brief description of drawings]

FIG. 1 is a system diagram of an example of the present invention.

FIG. 2 is a diagram showing a part of an example of a flowchart for explaining the present invention.

FIG. 3 is a diagram showing an example of a continuation of FIG.

FIG. 4 is a diagram showing an example of a continuation of FIG.

FIG. 5 is a diagram showing an example of a continuation of FIG. 4;

FIG. 6 is a diagram showing an example of a flowchart for explaining the present invention.

FIG. 7 is a diagram showing an example of a display state of time.

[Explanation of symbols]

 2 Antenna tuning circuit 4 Mixer circuit 6 Detection circuit 8 Speaker 10 PLL 12 Variable frequency divider circuit 20 Microcomputer 21 CPU 22 ROM 23 RAM 24 Memory 41 Clock circuit 50 LCD 100 Key input processing routine 200 Display processing routine Kd Time difference key Ke Enter key Km Minus key Kn Numeric key Kp Plus key Kr Registration key Kt Time key Kc Display switching key

Claims (1)

Claim: What is claimed is: 1. A clock circuit for measuring time according to local standard time, a display means for displaying time, a memory for holding time difference data with respect to world standard time, and the above-mentioned clock circuit for measuring time. A processing circuit for calculating data of local standard time and data of the time difference held in the memory and outputting data of world standard time, and a first circuit for changing the local standard time kept by the clock circuit. A key and a second key for changing the time difference data held in the memory are provided, and the world standard time data output from the processing circuit is supplied to the display means and displayed on the display means. A clock device that displays the above-mentioned world standard time.