JPS6339940B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a time storage device, and particularly to a time storage device that stores time information such as a timetable (departure time of a train, etc.) and stores the current time or arbitrarily set time. This allows time information related to time to be called up with a simple operation.

[Prior Art] As a conventional time storage device of this type, for example,
JNR has a system for searching for vacant trains called the COMTRAC system. This system was introduced in the magazine "Electronics" No. 181 (Showa era) published by Ohmsha.
It is described in detail in ``Railway and Computer Graphics'' on pages 226 to 236 of ``February 1946'', but broadly speaking, it can be broadly divided into the parts that control route control functions, which have strict requirements regarding real-time performance and reliability. and a part that governs the timetable rescheduling function, which is relatively light in terms of these conditions. The former is HITAC-
It is a dual system with the 7250 as the central processing unit, but the latter is a single system with the HITAC-8811 as the processing unit. Figure 8 shows the equipment configuration of the part that performs this traffic rescheduling. The HITAC-8811 system, like the IBM-1130 system, uses the core memory of the processing unit as a buffer for display data.

The purpose of the traffic rescheduling can be said to be to change the schedule. In the process of changing train schedules based on publicly announced information, there are two aspects to consider: the most appropriate changes to ensure a certain level of transport capacity, and the most appropriate changes to return to the planned schedule as soon as possible. It is necessary to think from For this reason, this system is configured to input and output information using data printers and graphic display devices, so that collaborative work between humans and computers can be carried out smoothly.

Furthermore, Japanese Patent Application Laid-Open No. 52-94750 discloses an electronic desktop calculator capable of sexagesimal calculations as shown in Figure 9, which stores time information and inputs the necessary time information to perform calculations. It has been shown that it is possible to

[Problems to be solved by the invention] However, conventional devices such as the former COMTRAC system are mainly used for creating schedules in railway operations, and require large computers to process large amounts of information. This is possible only when

Furthermore, although it is possible to know train schedules using data printers and graphic display devices, the places where they can be used are limited because the devices are large-scale. In this way, not only the device becomes large-scale but also expensive, and the number of people who can use such a device is limited.

Furthermore, conventional devices such as electronic desktop calculators capable of sexagesimal calculations simply perform calculations on input time information. Even if this computer were configured to be able to store a large amount of time information, the operator would have to input the necessary information to retrieve the stored time information and perform calculations on the retrieved time information. This method is inconvenient because it requires a complicated calculation procedure that involves sequential calculations.

Therefore, although time information can be easily calculated at any location, there is a problem in that it is not possible to call up train schedules or time information for trains that are about to arrive in time.

On the other hand, a wide variety of time information, such as train departure times, has become indispensable in daily life, and devices that can easily store, recall, and perform calculations on this type of personal time information are needed. The development of this is strongly desired.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention aims to reduce the size of the device to increase its portability, to be able to use it at any location, and to have a simple configuration so that the device can be provided at a low price, for example. Among the departure and arrival times of aircraft, trains, buses, ships, etc., the user can call up the departure and arrival times that he or she deems necessary and has entered into the device in advance, and can also call up the departure and arrival times that are available from the present moment (now). An object of the present invention is to provide a time storage device that can prevent missing a vehicle by having functions such as calculating the remaining time until the next departure and arrival time and displaying the result.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides clock means for outputting current time information, storage means for storing a plurality of pieces of time information, and an input device for inputting time information. means, display means for displaying a plurality of pieces of time information, and calling means for instructing to call up time information;
A first operation is performed in which the time information inputted from the clock means is operated on the time information retrieved from the storage means, or a second operation is performed in which the time information inputted from the input means is operated on the time information retrieved from the storage means. A calculation means selects at least one of the time information outputted from the clock means, the storage means, and the calculation means based on a call command from the call means, and selects at least one of the time information outputted from the clock means, the storage means, and the time information outputted from the calculation means based on a call command from the call means; Displays one of the time information after the current time based on the result of the first calculation or the result of the second calculation calculated by the calculation means, and displays the time difference between the time information calculated by the calculation means and the current time on the other display means. The present invention has a configuration including a control means for controlling display of information, and is characterized in that information on a predetermined time that can be reached from the current time or information on the remaining time until that time can be easily called up.

[Function] As described above, the present invention has a clock means, a storage means, an input means, a display means, a calling means, an arithmetic means, and a control means, and the control means performs the following operations based on a calling command from the calling means. It is possible to control four types of calculation and display. That is, (a) a mode in which the control means displays the time information output from the clock means on the display means (see Figure 2 A); (b) a mode in which the control means displays the current time information input from the clock means from the storage means; At the same time, display the information of the nearest future time on one side of the display means, and display the result obtained by calculating the output of the clock means and the future time information displayed on one side of the display means, that is, the remaining time on the display means. (c) In (b) above, the control means calls out from the storage means information on the next closest future time to the future time information displayed on one of the display means. One of the display means is updated and displayed, and the result obtained by calculating the output of the clock means and the future time information updated and displayed on one of the display means, that is, the updated remaining time is displayed on the other display means. (d) displaying on one side of the display means information on the nearest future time retrieved from the storage means with respect to the time information input by the control means from the input means; The result obtained by calculating the output of the clock means and the future time information displayed on one of the display means,
In other words, a mode in which the remaining time is displayed on the other side of the display means (see FIG. 2D) can be executed.

Therefore, according to the present invention, information on a predetermined time that can be reached from the current time or information on the remaining time until that time can be easily called up.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an example of the external appearance of a time storage device according to an embodiment of the present invention, and here, as an example, a small and thin so-called business card type device is shown. In the keyboard KBR shown in Figure 1, DIA is a display that displays the current time, called time information, etc. in hours and minutes, and DIB is the remaining time from the current time to the called time information (however, , within 59 minutes and 59 seconds) in minutes and seconds; OVL indicates the remaining time;
TCK, an indicator light that lights up when the time exceeds 59 minutes and 59 seconds.
is a call key to display the current time of the clock circuit built into this device on the display DIA, and SK is 4.
It has four operation keys □A, □B, □C, and □D, and time information is written to or read from the addresses assigned to each key □A to □D in the random access storage RAM described later. This is a group of selection keys for commanding things. Note that the storage means RAM in this example can store 128 pieces of time information corresponding to each of the selection keys □A to □D, respectively. As a result, for example, 128 pieces of time information can be stored in the storage RAM for each of four types of timetables.
128 pieces of time information can be input and output using the selection keys □A to □D.

TK stores time information in storage device RAM,
Or, it is a group of time input keys for setting arbitrary time, □0 to □9 in TK are keys for inputting the time value, □: is the key for inputting the unit of time, □, are keys for inputting the time unit. This key is used to enter the unit of minutes.
R/W is a two-position switch for determining whether time information is written to or read from the storage device RAM, which will be described later.
SEK is a set key for adjusting the time of the clock circuit TM built into this device.

Figures 2A to 2D show the indicators DIA and Figure 1.
In the DIB, each mode a to d explained in the [Effect] column.
This shows the state in which the time is displayed. FIG. 2A shows the state in mode a, and by pressing down the call key TCK shown in FIG.
For example, 14:23' is called and displayed on the display DIA.

Figure 2B shows the state in mode b;
In the state shown in Figure A, set the 2-position switch R/W to the "OUT" side that instructs reading from the storage device RAM, press the call key TCK, and then press down one of the selection keys □B, for example. , the current time displayed on the display DIA from among the time information assigned and stored in advance to □B
The nearest future time after 14:23' is called,
Displayed on the display DIA.

For example, in the time information assigned and stored to selection key □B, there are three
If there is time information, the current time 14:
14:43', which is the nearest future time after 23', is retrieved from the storage RAM, and the display DIA shows 14:43'.
43′ is displayed. Furthermore, the remaining time from the current time 14:23' to 14:43' is displayed on the display DIB in minutes and seconds. If the current time is 14:23′35″, the display DIB will show the following information as shown in Figure 2B.
9′, 25″ is displayed.

Figure 2C shows the state in mode C;
If you press the selection key □B further from the state shown in Figure B,
□ From the above-mentioned time information assigned and stored in B, the nearest future time after the currently displayed 14:43', that is, 15:06', is displayed on the display DIA, and for example, the current time The remaining time 42', 18'' from 14:23'42'' to 15:06' is displayed on the display DIB as shown in FIG. 2C.

Above, we have explained an example of calling the current time using the current time calling key TCK and calling the nearest future time after this time.
In the case of mode d shown in Figure D, instead of calling the current time, any desired time is set using the TK key, and the nearest future time after that time is selected from a large amount of time information stored in the storage device RAM. It is also possible to call. For example, set any desired time to 12:30' and press the selection key □A.
From the time information assigned and stored in
The case where the nearest future time after 12:30' is called will be explained.

In this case, set the switch R/W to the "OUT" position, and instead of pressing the current time call key TCK, press the time input key TK: □1□2□:□3□0□,
, then press the selection key □A. Here, for example, if time information 12:25', 12:38', and 13:01' are assigned to the selection key □A in the storage device RAM and stored, then the time information 12:25', 12:38', and 13:01' will be stored in response to the press of the selection key □A. Then, the nearest future time 12:38' after the time set by the TK key 12:30 is displayed on the display DIA. The display DIB also shows the current time, for example 11:
The remaining time 57', 50'' from 40'10'' to the time 12:38' displayed on the display DIA is displayed as shown in FIG. 2D.

Also, if the current time is 11:30′10″, the remaining time until 12:38′ displayed on the display DIA is 67 minutes 50 seconds, which exceeds 59 minutes 59 seconds. Therefore, the indicator light OVL on the display DIB lights up, indicating that there is more than 1 hour remaining.

Next, a procedure for inputting time information, such as a timetable, into the storage section assigned to the selection key □D in the storage device RAM will be described with reference to FIG.

First, set the switch R/W to the "IN" position, which instructs writing to the storage device RAM, and
Set time information to be written to RAM. To enter time 7:12' in the timetable shown in Figure 3A,
After pressing down the selection key □D, press the time input key □7□:
When the keys are pressed down in the order of □1□2□, time information is displayed on the display DIA in the order shown in FIG. 3B, and is also stored in the storage RAM.

In other words, by pressing □7□:
All old time information in the 7 o'clock range stored in RAM will be erased. Next, by pressing □1□2□, new time information 7:12' is input. Below □2
Time information such as □4□, □4□8□, . . . is sequentially written into the storage section of the storage device RAM assigned to the selection key □D.

If you want to set the built-in clock of this device to, for example, 13:40', turn the switch R/W to "OUT".
position and press the time input key TK □1□3□:□4□0□'
, and then press the time set key SEK.

FIG. 4 shows an example of the configuration of a time storage device to which the present invention is applied. Here, KBR is a group of time input keys
The above-mentioned keyboard in which the TK, selection key group SK, etc. are arranged, and the CTR are controllers that perform various calculations on signals from the keyboard KBR and send out various control signals (described later).

RAM is a random access storage device with 8k bits of memory that can store and read a large amount of time information.
Since the time information stored in the RAM is composed of a 16-bit BCD code, a maximum of 512 pieces of time information can be stored in this example.

COU is a binary up counter with 7-bit counter stages C1 to C7, and the controller
It is reset to 0 by the RST signal from CTR. Furthermore, SR is a data register, DS1 and DS, which temporarily stores hour and minute time information input from the TK key and sent from the controller CTR.
2 is a data selector that selects one of multiple input information under the control of selection commands SEL1 and SEL2, and TM is a data selector that selects one of multiple input information under the control of selection commands SEL1 and SEL2.
This is a clock circuit that supplies minute/second data) TMD to data selectors DS1 and DS2.

SUB is the subtraction of input data X and Y (Y-X)
Executes the difference output (Y-X) from the output terminal Z, and outputs the high-borrow signal HB when the subtraction result (Y-X) is negative or zero, and the low-borrow signal LB when it is positive. This is a subtracter that can be output from B. LT1, LT2 and LT3 are
These are latch circuits that latch inputs under the control of load commands LD1, LD2, and LD3, respectively. The outputs of latch circuits LT1 and LT2 are connected to drive circuit DR1,
Supplied to the display devices DIB and DIA via DR2.

The memory device RAM needs to be addressed with 9 bits corresponding to the above-mentioned 512 storage locations, and a 9-bit address signal is supplied to address input terminals A1 to A9. Here, the address input terminals A1 to A7 are supplied with the outputs of each counter stage C1 to C7 of the counter COU, and the address input terminals A8 and A9 for the upper two bits are supplied with the output of the latch circuit LT3.

The first 128 words of storage RAM are
Addresses as shown in Figure A are assigned in advance, and various time information is written therein. That is, address 0
The 1st to 128th words are assigned to 00 to 07F, the 129th to 256th words are assigned to addresses 080 to OFF, the 257th to 384th words are assigned to addresses 100 to 17F, and the 385th to 128th words are assigned to addresses 180 to 1FF.
Assign the 512th word. Furthermore, select keys □A, □B,
□C and □D have addresses 000 to 07, respectively.
F, 080~0FF, 100~17F and 18
Assign 0 to 1FF.

When the □A key is pressed down, the encode outputs B+D and C+D from the controller CTR are both "0", and when the □B key is pressed down, the B+D output is "1" and the C+D output is "0".
Therefore, when the □C key is pressed, the B+D output becomes "0" and the C+D output becomes "1", and when the □D key is pressed, both the B+D output and the C+D output become "1". The aforementioned latch circuit LT3 receives the encode outputs B+D and C+D and latches the contents of these encode outputs when the load command LD3 is supplied from the controller CTR.

Selection keys □A to □D and address input A8, A9
and the address and word number of the storage device RAM are associated as shown in FIG. 5B. The time information written to the storage device RAM is the output DID of the latch circuit LT2, and this time information
Sends DID to the D _o terminal of the storage device RAM. At the same time, the write timing is controlled by the controller CTR.
determined by timing pulses from to storage RAM.

By pressing the time input key group TK, the time information SRD temporarily stored in the data register SR, the time information MED sequentially read from the storage device RAM based on commands from the controller CTR, and the time information MED from the clock circuit TM are input from time to time. The sent time information TMD is supplied to the data selector DS2, and one of these data is selected by the SEL2 signal and output to the latch circuit LT2. The output of the latch circuit LT2 is supplied from the drive circuit DR2 to the display DIA, and is also supplied to the data selector DS.
1. D _o input terminal of storage device RAM and clock circuit
It is also supplied to the clock correction input terminal TS of TM.

Data selector DS1 receives hour and minute time information DID from latch circuit LT2, and clock circuit TM.
Provides time information TMD of hours, minutes, and seconds from
Select either one by SEL1 signal and subtract.
Send to input terminal X of SUB. In other words, the input terminal X has the time call key of the keyboard KBR.
When TCK is pressed down, either the hour and minute time information DID displayed on the display DIA or the constantly changing current time information TMD of hours, minutes, and seconds is input by selecting the data selector DS1.
In addition, input terminal Y receives terminals A1 to A9 of time information stored in advance in the storage device RAM.
corresponding to the address location specified by the terminal
Time information MED sequentially read from _Oo is supplied.

The subtractor SUB executes subtraction of (Y-X), takes out the subtraction result, that is, the remaining time SUT from the output terminal Z, and latches it in the latch circuit LT1 for displaying the remaining time. The timing of this latch is determined by the LD1 signal from controller CTR.

In addition, the subtracter SUB outputs a high borrow signal from output terminal B when the subtraction result (Y-X) is negative or zero.
HB is input, and when positive, a low-low signal LB is output. These borrow signals HB and LB are supplied to the controller CTR, and selection commands SEL1, SEL2,
and controls load commands LD1 and LD2.

In this embodiment configured as described above, when setting the clock circuit TM to an accurate time,
Enter the time to be set using the time input keys TK on the keyboard KBR, and enter the time in the data register.
Accumulate in SR.

Next, by pressing down the time set key SEK in time with an accurate clock or time signal, the data selector DS2 temporarily latches the set time information SRD in the latch circuit LT2 and displays it on the display by the selection command SEL2 of the controller CTR. ,
At the same time, the time correction input terminal of the clock circuit TM
The set time information SRD is sent to the TS, and the clock circuit is set to the correct time.

Next, store time information such as a timetable in a storage device.
The case of writing to RAM will be explained.

First, set the switch R/W to the "IN" position and press down on any of the selection keys □A to □D. An address signal indicating the first address of the storage area assigned to that key will be sent to the counter COU and latch circuit. LT3 and is supplied to address input terminals A1 to A9 of the memory device RAM.

As mentioned above with reference to FIG. 3, when time information (hour and minute information) is input from the time input key group TK,
The time information is stored in the data register SR,
Further, in response to the SEL2 signal from the controller CTR, the data selector DS2 selects the time information SRD from the register SR and supplies it to the latch circuit LT2.
The latch circuit LT2 latches the time information SRD in response to the load command LD2. The contents of this latch are
It is displayed on the display DIA, and the storage device RAM
It is also transferred to the input terminal D _{o of} , and written to the storage device at the previously specified address at the timing of the signal. Thereafter, by sequential time setting, the counter COU is sequentially incremented by +1, and the time information is sequentially written to the designated address.

Next, the operation of this embodiment will be explained in more detail by dividing it into modes (a) to mode (d). In addition, mode (b) ~
In mode (d), switch R/W is “OUT”
It shall be kept in position.

[Mode (a)] When the user presses down the time call key TCK, the current time information TMD is retrieved from the clock circuit TM, and the selection command SEL1,
When controlling SEL2 appropriately and using it as DS2 output,
Select the current time information TMD of minutes and seconds and latch it to the latch circuit LT2.
Subtractor with LT2 output, that is, time and minute information in TMD information, that is, DID information as DSI output
Supply to input terminal X of SUB.

[Mode (b)] Furthermore, when the user presses a desired key among the selection keys □A to □D, the read time information MED is subtracted from the address of the storage area corresponding to the selection key in the storage device RAM. Supplied to the Y input terminal of the device SUB. As a result, in the subtracter SUB, both inputs X,
When Y is subtracted and the subtraction result (Y -
A signal that determines that the time is later than the MED information (Y) and adds +1 to the count COU in order to recall the next stored time from the storage RAM.
Generate INC.

As a result, when the counter COU advances by +1,
The time information of the corresponding address location is updated.
Read out from storage RAM as MED information,
Transferred to subtracter SUB input terminal Y. and,
The subtracter SUB executes the same subtraction as described above, and the same operation is repeated until the low-borrow signal LB is generated.

Therefore, when the time information read from the storage device RAM becomes a value later than the current time and at the nearest future time, the subtraction result of the subtractor SUB (Y-
X) becomes positive, and a low-low signal LB is obtained.
By SEL2 signal from controller CTR,
In the data selector DS2, the same time information MED sent to the Y terminal is selected, and by the LD2 signal from the controller CTR, this time information MED is latched in the latch circuit LT2, and the previously latched time information DID disappears, and the display DIA changes from time information DID to time information MED.
Switch to .

At the same time, the output terminal Z of the subtracter SUB sends the result of (Y-X), that is, the SUT signal indicating the remaining time information to the latch circuit LT1, but at this time, the controller CTR sends the SUT signal to the latch circuit LT1.
Since the signal is sent out, the remaining time information SUT is latched in the latch circuit LT1 and further displayed as the remaining time on the display DIB.

[Mode (c)] After the current time and the nearest future time are read from the storage RAM and displayed as described above, when the user presses the same selection key again, the controller CTR The INC signal is generated, the counter COU is incremented by +1, and the time information MED of the address specified thereby is read from the terminal O _o of the storage device RAM. At this time, the data selector DS2 selects the new MED.
Latch the information to latch circuit LT2 and display
Display on DIA.

At the same time, the new MED information is also supplied to the Y input terminal of the subtracter SUB. At this time, the data selector DS1 selects the current time information TMD under the control of the SEL1 signal and supplies it to the X input terminal of the subtracter SUB. Therefore, the subtractor SUB compares the current time with the new time information, and displays the remaining time obtained as a result on the display DIB.

Therefore, at a certain time, the nearest future time information after the current time is stored in the storage RAM.
When the selection key operations are repeated sequentially as described above, the time information stored following the read time information is sequentially retrieved from the storage RAM and displayed on the display. The remaining time will be displayed on the DIA and the remaining time will be displayed on the display DIB.

[Mode (d)] In the above example, the current time is called using the current time call key TCK, and the nearest future time after this time is called. However, instead of calling the current time, the user In mode (d), a desired arbitrary time is set using the TK key, and the nearest future time after the set time is called from time information stored in the storage RAM.

In this case, the user must turn the switch R/W to “OUT”.
position, and instead of pressing the current time call key TCK, press down the time input key TK to set the desired time.The controller CTR appropriately controls the selection commands SEL1 and SEL2 to set the DS2.
As output, time information input into register SR
SRD is selected and latched to the latch circuit LT2, and the latched LT2 output, that is, DID information, which is information at an arbitrary time set by the user, is supplied to the input terminal X of the subtracter SUB as the DS1 output. .

Furthermore, when the user presses down a desired key among the selection keys □A to □D, the same operation as described in mode (b) and mode (c) occurs based on the time set by the user. will be carried out.

Here, the remaining time for this mode (d) is
The remaining time is displayed not from the arbitrary set time, but from the current time when the selection key is pressed.

Next, the operation of each part of this embodiment in the operation of calling time information related to the current time [mode (a), mode (b), mode (c)] will be explained in detail using the timing chart in Fig. 7. do.

In FIG. 7, A is the output signal based on the pressing operation of the selection key □B, B is the RES signal and load command LD3, and C is the latch circuit LT3 and counter for specifying the address of the storage device RAM.
Address information output from COU, D is MED information output from storage device RAM, E is information output from data selector DS1, F is subtractor SUB
Borrow signal (HB/LB) output by , G is a counter for specifying the address of the storage device RAM
INC signal for stepping COU, H is load command LD1 and LD2 for operating latch circuits LT1 and LT2, I is information latched in latch circuit LT1, J is information latched in latch circuit LT2. are shown respectively.

As an example, if the current time is 9:20'30'', select the nearest future time information after this time using the select key □B.
The case of calling from the time information assigned and stored will be explained.

Note that the storage location corresponding to the selection key □B in the storage device RAM is 08 as shown in FIG.
The explanation will be based on the assumption that time information is stored sequentially at addresses 0 to 0FF. It is also assumed that the switch R/W is switched to the "OUT" side in order to read time information from the storage device RAM.

Under the above conditions, mode (a) to mode (c)
I will explain about it.

[Mode (a)] User presses time call key TCK at time 9:
When the button is pressed down at 20'30'', only 9:20' of the 9:20'30'' information retrieved from the clock circuit TM is displayed on the display DIA as the current time 9:20'.

[Mode (b)] Next, the user presses the selection key □B at time 9:20′34″.
When you press down (A in Figure 7), the controller
The CTR outputs the RES signal “1” and the LD3 signal “1” to reset the counter COU, and
The encode signals 1 and 0 according to the selection key □B are latched in the latch circuit LT3, and the signal inputs of the input ports A8 and A9 of the storage device RAM are 1 and 0, respectively.
(B in Figure 7).

As shown in FIG. 5B, the selection key □B has
Of the RAM addresses, 128 addresses from 080 to 0FF are assigned, and time information as shown in FIG. 6 is stored in each address. Therefore, when the selection key □B is pressed down, RAM address 080 is specified first (C in Figure 7), so the output terminal O _o of the storage device RAM
The time information of 7:25' is output as MED information and sent to the Y terminal of the subtractor SUB (Figure 7).
D).

At the same time as this process, the controller CTR
When displayed on the display DIA by SEL1 signal,
The minute time information DID (9:20' in this example) and the current hour, minute, and second time information TMD (9:20'30'' in this example) that are sequentially output from the clock circuit TM. , time information DID (9:20') as data selector
DS1 and sends the selected time information to the X terminal of the subtracter SUB (E in FIG. 7).

Here, the subtractor SUB executes the subtraction (7:25'-9:20') of (Y-X), that is, (MED-DID), but the subtraction result is negative, so the subtractor SUB
A high-borrow signal HB is taken out from the B terminal of SUB (F in Figure 7), and the controller CTR that receives this signal HB changes the time information DID to the time information MED.
Determine the later time and store the next time information
Count INC signal to call from RAM
COU and increments the counter COU by +1 (G in Figure 7).

When the counter COU advances by +1, address 081 is specified as the RAM address, so the storage device
8 as MED information from the RAM output terminal _Oo :
The time information of 20' is output and sent to the Y terminal of the subtracter SUB. The subtractor SUB is (8:20'-9:
20′) is executed, but since it is negative, a high borrow signal HB is sent to the controller CTR in the same way as described above. Therefore, the controller CTR adds +1 to the counter COU again as described above and writes the RAM
Specify the address as address 082 and perform the same processing as described above until the subtracter SUB's subtraction result becomes positive and the low-borrow signal LB is sent out, that is, until the MED information becomes larger than the DID information. Repeat the action.

Here, in the example of Figure 6, the RAM address is
If address 084 is specified, time information 9:34' will be displayed.
Since it is supplied to the subtractor SUB as MED information,
(9:34'-9:20') becomes positive for the first time, and the subtractor
SUB supplies a low-low signal LB from the B terminal to the controller CTR. The controller CTR uses this low-low signal LB to determine the desired time, that is,
It is determined that the closest time information after the current time has been found, and this time information 9:34' is sent to the controller CTR.
The latch circuit LT2 is latched by the LD2 signal from the LD2 signal (H, J in FIG. 7).

Also a subtractor calculation to display the remaining time
In order to execute it in SUB, by changing the SEL1 signal, the hour, minute,
9:20'34'' is selected as the current time information TMD in seconds, and its output is supplied to the X input terminal of the subtracter SUB (E in FIG. 7).

The subtractor SUB executes the subtraction of (MED-TMD), that is, (9:34'-9:20'34"), and latches the time information of 13'26" of the subtraction result by the LD1 signal from the controller CTR. Latch to circuit LT1 (H, I in Figure 7).

As described above, the time information 9:34' is latched in the latch circuit LT2, and the remaining time information 13'26'' is latched in the latch circuit LT1.The respective information is sent to the drive circuits DR1 and DR2. Display device DIA
9:34' is displayed on the display DIB, and 13'26'' is displayed on the display DIB.

[Mode (c)] If the user presses the selection key □B further at the time 9:20'40'', the controller
CTR sends an INC signal to counter COU, counter COU advances by +1, and address 085 is specified as the RAM address, so 10:14' is the Y input terminal of subtractor SUB as output information MED of storage device RAM. By repeating the same operation as above, the time information 10:14' is displayed on the display DIA, and the time information 10:14' is displayed on the display DIA.
Remaining time information (10:14'-9:20'40''), ie, 53'20'' is displayed on the DIB.

In addition, when the user presses the selection key □B again at time 9:20'42'', 08 is displayed as MED information.
10:28' at address 6 is sent to the Y input terminal of the subtractor SUB, which operates in the same way as described above, and the display DIA shows
10:28′ is displayed, but the remaining time calculated by the subtractor SUB (10:28′-9:20′42″) is 67′18″.
Since it exceeds 59′59″, the indicator light of the indicator DIB
OVL lights up and the remaining time is not displayed.

The above has explained how to call up time information related to the current time 9:20', but as mentioned above, the user can set any desired time and call up time information related to the set time. [Mode (d)] is also performed in the same procedure as described above, except that the reference time (time information DID) is changed from the current time to an arbitrary set time. However, in this case, the remaining time is displayed not from the arbitrary set time but from the current time when the selection key is pressed.

[Effects of the Invention] As explained above, according to the present invention, time information related to the current time or an arbitrarily set time, such as aircraft, trains, etc.
It is now possible to easily call up the departure and arrival times of buses, ships, etc. from the personal time information entered in advance by the user, and the remaining time until the next or the next departure and arrival time can be calculated and displayed. As a result, it is possible to prevent passengers from missing their rides, etc.

Moreover, since the time storage device of the present invention processes only personal time information, it can be constructed as a small, portable and inexpensive device, so there is no need to use large computers used to create schedules for railway operations, etc. There are no restrictions on who can use it or where it can be used, so if a general traveler carries it when traveling,
Not only does this eliminate the conventional inconvenience of finding the necessary time information by comparing a clock and a timetable, but it also automatically calculates the remaining time until that time, making it even more user-friendly.

In addition, in the present invention, an arbitrary time can be set,
Since it is also possible to call up time information close to that time, time information can be used over a wide range of areas.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of the appearance of an embodiment of the present invention;
2A to 2D are explanatory diagrams showing the display state in each mode of the display of the time storage device shown in the first diagram, FIG. 3A is a table diagram showing an example of a timetable, and FIG. 3B is a diagram showing this time FIG. 4 is a block diagram showing an example of the circuit configuration of the embodiment of the present invention shown in FIG. 1. FIG.
is a table showing the correspondence between the address, word number, and time information of the storage device RAM in FIG. 4, and FIG. 5B is a table showing the correspondence between the address of the storage device RAM in FIG. A table showing the relationship between the address of the device RAM and the word number, FIG. 6 is a table showing the relationship between the address assigned to the selection key □B in FIG. 1 and time information, and FIG. FIG. 8 is a block diagram showing an example of a conventional device, and FIG. 9 is a plan view showing the external appearance of another conventional device. TCK...time call key, SK...selection key group,
TK...Time input key group, DIA, DIB...Display,
OVL...indicator light, SEK...set key, R/W...2
Position switch, KBR...Keyboard, CTR
...Controller, RAM...Storage device, SUB...Subtractor, TM...Clock circuit, COU...Counter, DS1,
DS2...Data selector, LT1, LT2, LT3...
Latch circuit, DR1, DR2...drive circuit.

Claims (1)

[Scope of Claims] 1. Clock means for outputting current time information; Storage means for storing a plurality of time information; Input means for inputting time information; Display means for displaying a plurality of time information; Retrieval means for instructing retrieval of information; and a first unit for performing an operation between the time information inputted from the clock means and the time information retrieved from the storage means.
arithmetic means for performing an arithmetic operation or a second arithmetic operation for calculating the time information inputted from the input means and the time information read from the storage means; and at least one of the time information outputted from the calculating means, and displaying the result of the first calculation calculated by the calculating means or the second calculation on one of the display means based on the command from the calling means. control means for displaying one of the time information after the current time as a result of the above, and displaying time information of the difference between the time information calculated by the calculation means and the current time on the other of the display means; A time storage device comprising: