JP2004294206A - Date display device and camera equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means for specifying automatically a calendar display form corresponding to a standard radio wave by one or both the frequency and the code of the received standard radio wave in order to change the calendar display form by a simple operation, while aiming miniaturization and weight reduction, and for displaying a standard time of the standard radio wave in the specified calendar display form. <P>SOLUTION: This date display device 10 is equipped with an LCD 18 for displaying the time in a prescribed calendar display form, a standard radio wave receiving circuit 14 capable of receiving a plurality of standard radio waves having information on the standard time, which are mutually different in both or either of the frequency and the code, a specification means for specifying the calendar display form corresponding to the standard radio wave by both or either of the frequency and the code of the received standard radio wave, and a CPU 11 as a display control means for displaying on the LCD 18 the standard time of the standard radio wave in the specified calendar display form. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a date display device that receives a standard radio wave having information about a standard time and displays the standard time in a predetermined calendar display form, and a camera including the date display device.
[0002]
The “standard radio wave” in this specification does not include a radio wave from a GPS satellite.
[0003]
[Prior art]
The display format of the calendar differs depending on countries and regions around the world, for example, year, month, day, month, year, day, month, and year. For this reason, in a camera, a clock, or the like having a conventional calendar function, the display form of the calendar can be changed by operating a switch.
[0004]
Further, a technique for changing a calendar display mode to a display mode corresponding to a travel country based on information on a country name or a region name and a period input by an input unit is disclosed in Patent Document 1 below.
[0005]
[Patent Document 1]
JP-A-11-109477
[Problems to be solved by the invention]
However, in the above-described technology, it is necessary to operate a switch or input information on a country name or a region name and a period every time the display mode of the calendar is changed. In addition, when the power is turned on (for example, when the battery is replaced with a new battery), the display returns to the default display form, so the display form has to be set again according to the country or region. As described above, changing the display form of the calendar is a very troublesome and complicated operation.
[0007]
In many cases, the owner of the camera or clock forgets to change the display format of the calendar. If the user forgets to change the display format, the date is printed in a different display format from that of the country or region. May be printed.
[0008]
Further, when shipping a camera, a clock or the like to a foreign country, a default calendar display mode at power-on is set in advance to a display mode of a destination country or the like. At this time, it is conceivable that the default calendar display mode is changed to one and switched by a switch. However, since a camera, a clock, and the like which are generally carried by a user are strongly required to be small and light, The installation of the above-mentioned switch hinders downsizing and weight reduction, and when used together with an existing switch, there is a problem that the setting operation becomes complicated.
[0009]
The present invention has been made to solve the above-described problems, and has a date display device capable of changing the display mode of a calendar with a simple operation while reducing the size and weight, and a camera having the date display device. The purpose is to provide.
[0010]
[Means for Solving the Problems]
To achieve the above object, the date display device according to the present invention, as described in claim 1, has display means for displaying time in a predetermined calendar display form, and has information on standard time, Radio wave receiving means capable of receiving a plurality of standard radio waves whose frequency and / or code are different from each other, and specifying a calendar display mode corresponding to the standard radio wave by using both or one of the frequency and the code of the received standard radio wave It is characterized by comprising a specifying means and a display control means for displaying the standard time of the standard radio wave on the display means in the specified calendar display form.
[0011]
The date display device includes display means for displaying the time in a predetermined calendar display form, and the radio wave receiving means can receive a plurality of standard radio waves having information on the standard time. The plurality of standard radio waves have different frequencies and / or codes from each other. Therefore, the specifying unit specifies the calendar display mode corresponding to the standard radio wave by using both or one of the frequency and the code of the standard radio wave received by the radio wave receiving unit, and the display control unit uses the specified calendar display format. Then, the standard time of the standard radio wave is displayed on the display means.
[0012]
In this way, the calendar display form corresponding to the standard radio wave is automatically specified based on the frequency and / or code of the received standard radio wave, and the standard time of the standard radio wave is displayed in the specified calendar display form. In order to display on the means, there is no need for a switch for setting the calendar display form at all, and there is no need to let the user operate the switch, and in the calendar display form corresponding to the standard radio wave received in the country / region where it is currently located The time can be displayed automatically. That is, it is possible to automatically change the display form of the calendar without the need for user operation, while reducing the size and weight by eliminating the need for a switch.
[0013]
In order to achieve the above object, a date display device according to the present invention, as described in claim 2, a display means for displaying time in a predetermined calendar display form, and a predetermined calendar display mode Non-volatile memory storing the information of the form, reading means for reading the information of the calendar display form stored in the non-volatile memory when a new power is turned on, having information on the standard time, frequency and / or code Radio wave receiving means capable of receiving a plurality of standard radio waves different from each other, and display control means for displaying the standard time of the standard radio wave received by the radio wave receiving means on the display means in a calendar display format read by the reading means. It is characterized by having.
[0014]
The date display device includes display means for displaying time in a predetermined calendar display form, and a non-volatile memory storing information of a predetermined calendar display form. Are received. The plurality of standard radio waves have different frequencies and / or codes from each other, and can be identified by these frequencies or codes. Therefore, in the date display device, when a new power is turned on, the reading means reads the information of the calendar display form stored in the nonvolatile memory, and the display control means reads the information of the radio wave receiving means in the read calendar display form. Display the standard time of the received standard radio wave on the display means.
[0015]
In this way, when a new power is turned on in the date display device, the information of the calendar display format stored in the nonvolatile memory is automatically read, and the standard time of the standard radio wave is displayed in the calendar display format by the display control means. It is automatically displayed on the display means. For this reason, there is no need to provide a switch for setting the default calendar display mode when the power is turned on (for example, when a battery is replaced with a new battery), and this does not hinder the reduction in size and weight of the device. There is no complicated setting operation. That is, it is possible to automatically initialize the display mode of the calendar without the need for a user operation at the time of turning on the power while reducing the size and weight by eliminating the switch.
[0016]
The date display device according to claim 1 or 2 can be provided in a camera as described in claim 3, and the same effect as described above can be obtained.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, various embodiments according to the present invention will be described.
[0018]
[First Embodiment]
In the first embodiment, the invention described in claim 1 will be described.
[0019]
FIG. 1 shows a configuration diagram of a date display device 10 of the present embodiment. As shown in FIG. 1, the date display device 10 is connected to an antenna 12 for receiving a radio wave, and has a transmission station frequency switching circuit 13 for switching a transmission station frequency, and information about a standard time. A standard radio wave receiving circuit 14 capable of receiving a plurality of standard radio waves, both of which are different from each other, a transmitting station setting switch 15 for a user to set a transmitting station, and a user for setting and changing the time of an internal clock. Internal clock time setting switch 16, clock circuit 17 for counting up date and time information (time and date information) based on a reference clock, liquid crystal display (LCD) 18 as a display device, and operation of each of the above components And a CPU 11 for controlling / monitoring.
[0020]
In the date display device 10, the transmitting station can be set by the user with the transmitting station setting switch 15, and the standard radio wave receiving circuit 14 and the CPU 11 automatically determine the transmitting station by the processing of FIG. It is also possible to set.
[0021]
The CPU 11 includes a ROM 11A and a RAM 11B, and information of a default calendar display form is stored in the ROM 11A in advance.
[0022]
Next, a process of automatically setting a calendar display mode after receiving a standard radio wave (standard radio wave reception process) will be described with reference to FIG.
[0023]
When the date display device 10 receives the standard radio wave, the CPU 11 starts executing the standard radio wave reception process of FIG.
[0024]
First, it is determined whether or not a transmitting station has already been set by the transmitting station setting switch 15 (S01). At this time, if the transmitting station has already been set, an attempt is made to decode the standard radio wave using the frequency and code of the set transmitting station (S02).
[0025]
It is determined whether or not the decryption was successful (S03). If the decryption was successful, a calendar display form corresponding to the set transmitting station (country / region) is set, and the time obtained by the decryption is set. Is set (S04), the time is displayed on the LCD 18 in the set calendar display mode (S15), and the processing in FIG. 2 is terminated.
[0026]
On the other hand, if the decryption was not successful in S03, the fact that the standard radio wave could not be received is displayed on the LCD 18 (S05). Then, the default calendar display mode stored in the ROM 11A is set, the time of the built-in clock circuit 17 is set (S06), and the time is displayed on the LCD 18 in the set calendar display mode (S15). The process of No. 2 ends.
[0027]
If the transmitting station has not been set in S01, a receiving frequency for one transmitting station (for example, the A transmitting station) is set by the transmitting station frequency switching circuit 13 (S07). In this state, it is determined whether or not the input of the standard radio wave is detected (S08). If the input of the standard radio wave is detected, the decoding of the standard radio wave is attempted using the frequency and code of the transmitting station A (S09).
[0028]
It is determined whether or not the decryption was successful (S10). If the decryption was successful, the calendar display format corresponding to the A transmitting station (country / region) is set, and the time obtained by the decryption is set. Then (S11), the time is displayed on the LCD 18 in the set calendar display mode (S15), and the processing in FIG. 2 ends.
[0029]
On the other hand, if the decryption was not successful in S10, an attempt is made to decrypt the standard radio wave using the frequency and code for the B transmitting station (S12). It is determined whether or not the decryption was successful (S13). If the decryption was successful, the calendar display form corresponding to the B transmitting station (country / region) is set, and the time obtained by the decryption is set. Then (S14), the time is displayed on the LCD 18 in the set calendar display mode (S15), and the processing of FIG. 2 is terminated.
[0030]
However, if the decryption was not successful in S13, the fact that the standard radio wave could not be received is displayed on the LCD 18 (S05). Then, the default calendar display mode stored in the ROM 11A is set, the time of the built-in clock circuit 17 is set (S06), and the time is displayed on the LCD 18 in the set calendar display mode (S15). The process of No. 2 ends.
[0031]
By the way, if the input of the standard radio wave is not detected in S08, it can be determined that the standard radio wave cannot be received at the reception frequency for the A transmitting station, so that the receiving frequency for another transmitting station (for example, the N transmitting station) is transmitted. The setting is performed by the station frequency switching circuit 13, and a processing group G2 similar to the above S07 to S14 (processing group G1) is executed.
[0032]
If the input of the standard radio wave is not detected in the judgment process corresponding to S08 in the processing group G2, it can be determined that the standard radio wave cannot be received at the reception frequency for the N transmitting stations, and therefore, another transmission station ( For example, a reception frequency for (N + α) transmission station is set by the transmission station frequency switching circuit 13, and a processing group G3 similar to the processing group G1 is executed.
[0033]
In the processing groups G2 and G3, when it is impossible to decode the standard radio wave at any transmitting station frequency, the fact that the standard radio wave cannot be received is displayed on the LCD 18 (S05), and the ROM 11A is displayed. The stored default calendar display mode is set, the time of the built-in clock circuit 17 is set (S06), and the time is displayed on the LCD 18 in the set calendar display mode (S15). finish.
[0034]
According to the processing of FIG. 2, if the transmitting station is not set in advance, the calendar display mode corresponding to the received standard radio wave is automatically specified, and the standard time of the standard radio wave is specified in the specified calendar display mode. A calendar display format corresponding to standard radio waves received in the current country / region where no switch is required for setting the calendar display format and the user does not need to operate the switch to display on the display means. Can automatically display the time. That is, it is possible to automatically change the display form of the calendar without the need for user operation, while reducing the size and weight by eliminating the need for a switch.
[0035]
[Second embodiment]
In the second embodiment, the invention described in claim 2 will be described.
[0036]
FIG. 3 shows a configuration diagram of the date display device 10S of the present embodiment. As shown in FIG. 3, the date display device 10S has substantially the same configuration as the date display device 10 of FIG. 1 described above, but instead of the transmission station setting switch 15, information of a preset calendar display form is displayed. An EEPROM (Electrically Erasable Programmable Read-Only Memory) 19 is provided as a stored nonvolatile memory.
[0037]
When a new power is turned on, the CPU 11 reads information on the calendar display format stored in the EEPROM 19 and controls the LCD 18 to display the standard time of the standard radio wave in the read calendar display format.
[0038]
Next, a process for power-on initialization (power-on initial process) will be described with reference to FIG. Here, there are a total of four calendar display modes: a display mode for the A transmitting station, a display mode for the B transmitting station, a display mode for the C transmitting station, and a display mode for the D transmitting station. I do.
[0039]
When the power is turned on in the date display device 10 (for example, the battery is replaced with a new battery), the CPU 11 starts execution of the power-on initial process of FIG.
[0040]
First, the information of the calendar display format stored in the EEPROM 19 is read (S21). Then, while receiving the standard radio wave, it is determined whether the preset calendar display mode is the display mode for the A transmitting station (S22). A calendar display format corresponding to the transmitting station (country / region) is set, a time obtained by decoding the standard radio wave is set (S25), and the time is displayed on the LCD 18 in the set calendar display format ( S29), the process of FIG. 4 ends.
[0041]
If it is not the display mode for the A transmitting station in S22, the standard radio wave is further received, and it is determined whether the preset calendar display mode is the display mode for the B transmitting station (S23). , B display station, the calendar display mode corresponding to the B transmission station (country / region) is set, and the time obtained by decoding the standard radio wave is set (S26). The time is displayed on the LCD 18 in the displayed calendar display form (S29), and the processing in FIG. 4 ends.
[0042]
If it is not the display mode for the B transmitting station in S23, the standard radio wave is further received, and it is determined whether or not the preset calendar display mode is the display mode for the C transmitting station (S24). , C display station, the calendar display mode corresponding to the C transmission station (country / region) is set, and the time obtained by decoding the standard radio wave is set (S27). The time is displayed on the LCD 18 in the displayed calendar display form (S29), and the processing in FIG. 4 ends.
[0043]
If the display mode is not the display mode for the C transmitting station in S24, it is possible to determine that the preset calendar display mode is the display mode for the D transmitting station. The calendar display mode is set, the time obtained by decoding the standard radio wave is set (S28), the time is displayed on the LCD 18 in the set calendar display mode (S29), and the processing in FIG. 4 is terminated. .
[0044]
By the above-described processing in FIG. 4, when a new power supply is turned on, the information of the calendar display form stored in the EEPROM 19 is automatically read, and the standard time of the standard radio wave is automatically displayed on the display means in the calendar display form. Is done. For this reason, there is no need to provide a switch for setting the default calendar display mode when the power is turned on, and this does not hinder the reduction in size and weight of the device, and does not cause complicated switch setting operations. That is, it is possible to automatically initialize the display mode of the calendar without the need for a user operation at the time of turning on the power while reducing the size and weight by eliminating the switch.
[0045]
[Third embodiment]
In the third embodiment, an example will be described in which the invention described in claim 1 is applied when the power is turned on. The configuration of the date display device of the present embodiment is the same as that of the date display device 10 shown in FIG.
[0046]
Next, the process at the time of receiving the first standard radio wave after the power is turned on will be described with reference to FIG. Here, there are a total of four calendar display modes: a display mode for the A transmitting station, a display mode for the B transmitting station, a display mode for the C transmitting station, and a display mode for the D transmitting station. I do.
[0047]
When the power is turned on in the date display device 10 (for example, the battery is replaced with a new battery), the CPU 11 starts execution of the power-on initial process of FIG.
[0048]
First, a standard radio wave is received (S41). Then, it is determined whether or not the received standard radio wave can be decoded by the frequency and code of the A transmitting station (country / region) (S42). The calendar display mode is set, the time obtained by decoding the standard radio wave is set (S45), the time is displayed on the LCD 18 in the set calendar display mode (S49), and the processing in FIG. 5 is terminated. .
[0049]
If it is determined in S42 that the decoding is not possible with the frequency / code of the transmitting station A (country / region), it is determined whether or not the decoding is possible with the frequency / code of the transmitting station B (country / region) (S43). If so, the calendar display mode corresponding to the B transmitting station (country / region) is set, the time obtained by decoding the standard radio wave is set (S46), and the time is set in the set calendar display mode. The information is displayed on the LCD 18 (S49), and the processing in FIG. 5 ends.
[0050]
If it is determined in S43 that the signal cannot be decoded by the frequency / code of the B transmitting station (country / region), it is determined whether or not the signal can be decoded by the frequency / code of the C transmitting station (country / region) (S44). If so, the calendar display mode corresponding to the C transmitting station (country / region) is set, the time obtained by decoding the standard radio wave is set (S47), and the time is set in the set calendar display mode. The information is displayed on the LCD 18 (S49), and the processing in FIG. 5 ends.
[0051]
If it is not decipherable with the frequency and code of the C transmitting station (country / region) in S44, it can be determined that the calendar display mode is the display mode for the D transmitting station, and thus the D transmitting station (country / region) Is set, the time obtained by decoding the standard time signal is set (S48), and the time is displayed on the LCD 18 in the set calendar display form (S49), and the process of FIG. To end.
[0052]
By the above-described processing in FIG. 5, when the standard radio wave is received for the first time after the power is turned on, the calendar display mode corresponding to the received standard radio wave is automatically specified, and the standard radio wave standard is specified in the specified calendar display mode. Since the time is displayed on the display means, there is no need for any switch for setting the calendar display mode, and there is no need for the user to operate the switch, and the calendar corresponding to the standard radio wave received in the current country / region. The time can be automatically displayed in a display mode. That is, it is possible to automatically change the display form of the calendar without the need for user operation, while reducing the size and weight by eliminating the need for a switch.
[0053]
Note that the date display devices of the first to third embodiments can be mounted on a camera. In this case, when using the camera in a foreign country where the calendar display mode is different from Japan, the setting is automatically changed to the foreign calendar display mode without the user changing the calendar display mode. Thus, when the date and time information is imprinted on the photo print, the imprint of the date and time information in a calendar display format corresponding to the foreign country can be realized.
[0054]
Of course, the date display devices according to the first to third embodiments are very effective if applied to objects carried by a user on a foreign trip, such as a clock or a mobile phone, in addition to a camera. The same effect as above can be obtained.
[0055]
【The invention's effect】
As described above, according to the present invention, the calendar display mode corresponding to the received standard radio wave is automatically specified, and the standard time of the standard radio wave is displayed in the specified calendar display mode, or the power is turned on. Since the standard time of the standard radio wave is displayed in the calendar display format that is stored in advance, a switch for setting the calendar display format is not required at all, and the calendar corresponding to the standard radio wave received in the current country / region The time can be automatically displayed in a display mode. That is, it is possible to reduce the size and weight of the switch by eliminating the need for a switch and to eliminate the complexity of the user operation.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a date display device according to first and third embodiments.
FIG. 2 is a flowchart of a process executed in the first embodiment.
FIG. 3 is a configuration diagram of a date display device according to a second embodiment.
FIG. 4 is a flowchart of a process executed in a second embodiment.
FIG. 5 is a flowchart of a process executed in a third embodiment.
[Explanation of symbols]
10, 10S: date display device, 11: CPU, 11A: ROM, 11B: RAM, 12: antenna, 13: transmitting station frequency switching circuit, 14: standard radio wave receiving circuit, 15: transmitting station setting switch, 16: internal clock Time setting switch, 17 clock circuit, 18 LCD, 19 EEPROM.

Claims (3)

Display means for displaying the time in a predetermined calendar display form;
Radio wave receiving means having information about the standard time, and capable of receiving a plurality of standard radio waves in which both or one of the frequency and the code are different from each other,
Specifying means for specifying a calendar display form corresponding to the standard radio wave, by both or one of the frequency and the code of the received standard radio wave,
Display control means for displaying the standard time of the standard radio wave on the display means in the specified calendar display form;
Date display device equipped with. Display means for displaying the time in a predetermined calendar display form;
A nonvolatile memory storing information of a preset calendar display form,
Reading means for reading information in a calendar display form stored in the nonvolatile memory when a new power is turned on,
Radio wave receiving means having information about the standard time, and capable of receiving a plurality of standard radio waves in which both or one of the frequency and the code are different from each other,
Display control means for displaying the standard time of the standard radio wave received by the radio wave receiving means on the display means in a calendar display form read by the reading means,
Date display device equipped with. A camera comprising the date display device according to claim 1.

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