JPH01203990A - Elapsed time display device - Google Patents

Abstract

PURPOSE:To know misoperation in reference data setting immediately by generating elapsed time data when data from an arithmetic means is positive-value data or a warning signal indicating that the time is not an elapsed time when the data is negative-value data. CONSTITUTION:A current date counter A consists of a year digit counter 9, a month-digit counter 10, a day-digit counter 11, a leap-year decision circuit 12, and a month correcting circuit 13. A reference date setting counter B consists of a year-digit counter 14, a month-digit counter 15, a day-digit counter 16, a leap-year decision circuit 17, and a month-end correcting circuit 18. An elapsed time display part C consists of a decoder 20 which outputs an elapsed time sent from a CPU 1 to a display body 19, a decoder 22 which outputs it to a display body 21, and a display switching decoder 25 which displays the elapsed time selectively on the display bodies 23 and 24 when the elapsed time is longer than one year or on the display body 23 and 24 when not. A data correcting pulse generating circuit 26 selects counters 9, 10,...16 in order to correct the contents of the counters. A driving circuit 29 drives and controls a LED 30 which displays a warning when the reference date is set to a data after the current date.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to an elapsed time display device disposed in a data imprinting device for a watch or a camera.

(Background of the Invention) In a conventional camera, a device has already been proposed in which, by loading a film into the film cartridge chamber, the date and time when the film was loaded can be stored and displayed when necessary. , displays the elapsed time from the birthday to the current date in years, months, and days, such as in children's growth records.
Moreover, a device that can imprint the image on film has not yet been commercialized, and the appearance of this type of device has been desired. However, when such a device is newly provided, the following problems may occur.

1) In this type of device, the user has to manually set the reference date (year, month, day of birthday, etc.), so in this case, for example, setting the reference date after the current date may occur. There is a possibility of malfunction.

2) As a countermeasure in case the above settings are made incorrectly, it may be possible to represent the elapsed time as a negative value, but in this case, it would not only confuse the user, but also display both positive and negative values. Since the circuit must be made possible, the circuit scale becomes large.

(Object of the Invention) The first object of the present invention is to provide an elapsed time display device that can immediately notify an erroneous operation in setting a reference date.

A second object of the present invention is to provide an elapsed time display device that can display a warning in the event of an erroneous operation at low cost and in an easy-to-understand manner.

(Features of the Invention) In order to achieve the above object, the present invention causes the numerical display means to display the elapsed time data when the data from the calculation means is data of a positive value meaning elapsed time. ,
If the data is a negative value, a control means for generating a warning display signal indicating that the data is not elapsed time data, and a warning display means for displaying a warning upon generation of the warning display signal are provided. , if the reference date is set after the current date, a warning is displayed.

Further, in the present invention, when the data from the calculation means is positive value data indicating elapsed time, the elapsed time data is displayed, and when the data is negative value data, the numerical display means Provide a display instruction means for zeroing the display caused by the
The present invention is characterized in that the numerical display means for displaying the elapsed time can also be used as a warning display means without adding any special function, and zero is used for the warning display.

(Embodiments of the Invention) Hereinafter, the present invention will be described in detail based on illustrated embodiments.

FIG. 1 is a block diagram showing one embodiment of the present invention. In the figure, 1 is a CPU that sequentially controls the device and has the function of calculating elapsed time from the current date and a set reference date, 2 is an oscillation circuit, and 3 is a CPU that divides the output from the oscillation circuit 2. 4 is a RAM that stores various input/output data; 5 is a ROM that stores program contents; 6 is an address bus; 7 is a data bus; 8 is from the frequency divider circuit 3. This is a daily pulse generation circuit that further divides the frequency of the clock and generates a daily pulse.

A is a current date counter that counts the current date,
A palm reading counter 9 outputs the contents of the last two digits of the Western calendar for current year information to the input ports YO to Y5 of the CPU 1, a moon phase counter 10 outputs the contents of the current month to the input ports MO to M3 of the CPUI, and CPtJl for the current date. input port 00~0
3, a well-known leap year determination circuit 12 that determines a leap year by determining the contents of the current palm reading counter 9, and a leap year determination circuit 12 that determines whether the current month is a large month (31 days). Determine whether it is a small month (30 days) or February (28 or 29 days) and set the day digit counter 1.
It is composed of a month correction circuit 13 that outputs a month correction signal.

B is a reference date setting counter that sets the reference date that is the basis for elapsed time calculation, and the palm reading counter 14 outputs the content of the last two digits of the year information of the year information of the reference date to the input ports SYO to SY5 of the CPU 1, and the reference date. The moon phase counter 15 outputs the month contents to the CPU input ports SMO to SM3, the day digit counter 16 outputs the day contents of the reference date to the input port 500-3D4 of the CPU 1, and the palm reading counter 14 determines the contents of the leap year. The leap year determination circuit 17 determines whether the month is large (31
The month-end correction circuit 13 is similar to the month-end correction circuit 13 that determines whether it is a month of 30 days, a month of 30 days, or a month of February (28 or 29 days), and outputs a month correction signal to the reference day digit counter 16. It is composed of a month-end correction circuit 18.

C is an elapsed time display section that displays the elapsed time sent from the CPU 1, and the output ports PH0-PI of the CPU 1
(Decoder 20 and CPU that decode the contents of the upper and lower digits of the elapsed time sent from 5 and output it as a display driver signal to the seven segment 2-digit display 19.
A decoder 22 decodes the contents of the lower digits of the elapsed time sent from the output ports PLO to PL5 of the CPU 1 and outputs it as a display driver signal to the seven segment 2-digit display 21, and the output port YM/MOCTRL of the CPU 1.
According to the output of
．． 24 is “~year~month” (actual display is “~y~m”)
), if the elapsed time is less than one year, display 23.
24 is comprised of a display switching decoder 25 that selectively displays "-month-day" (the actual display is r-m-dJ).

26 generates a correction pulse every time the switch 27 is pressed, and includes a finger counter 9, a moon phase counter 10, a day digit counter 11, a finger counter 14, and a moon phase counter 15.
, day digit counter 16 in sequence, and switch 28
A data correction pulse generation circuit 29 generates a correction pulse every time a pressing operation is performed, and cyclically corrects the contents of the counter selected by the switch 27 one by one. This is a driver circuit that controls the drive of the LED 30 that displays a warning when the reference date is set after the current date, according to the output.

Figure 2 shows the correspondence between the boat addresses of each input/output boat of the CPU 1 shown in Figure 1, the memory addresses in the RAM 4, and their contents; 4 shows the output state outputted from the month-end correction circuit 18 to the CPU 1, and FIG. 4 shows the internal structure of the display switching decoder 25 and the displays 23 and 24 that select and display accordingly.

In the above configuration, when the power is turned on, the contents of the current date counter A and the reference date setting counter B are always loaded into the RAM 4 via the CPU 1, and the elapsed time is displayed in the CPU UI based on these contents. The results are output from the output ports PHO to PH5 and PLO to PL4, and the contents are displayed on the elapsed time display section C.

Next, operations such as calculation of elapsed time will be explained according to the flowchart of FIG.

When the program starts, the operation starts from #101, but first, the current date (D) and the day digit (SD) of the reference date are read from RAM4, and the subtraction (D-3D) is performed. is the elapsed date (PD), then #102
Then, it is determined whether the value of the elapsed date (PD) is "positive" or "negative". If the result is "negative", proceed to #103, add the number of days (DM) of the current month of the reference date to the elapsed date (PD), and set this as a new elapsed date (PD).
shall be. Next, in #104, the current month (M) and standard month (SM)
is read, and the calculation (M-SM) is performed to determine this as the elapsed month (PM). Since a carry occurred in the previous #102, in the next #105, "1" is calculated from the elapsed month (PM).
"pull. - If the elapsed date (PD) is "positive" in the above #1o2, the process proceeds to #106, and the elapsed lunar phase (PM) is calculated by the same calculation as in the above #104.

Proceeding to the next step #107, it is determined whether the value of the elapsed month (PM) obtained as described above is "positive" or "negative". If the result is "negative", the process proceeds to #108, and since a carry has occurred, "12" is added and this is set as a new elapsed month (PM). Next, in #109, the current rate (
Y) and the base year (SY), perform the calculation (Y-SY), define this as the elapsed year (py), and proceed with #107 above.
Since a carry has occurred, in the next step #110, "1" is subtracted from the elapsed year (PY).

On the other hand, if the elapsed month (PM) is "positive" in #107, the process proceeds to #111, and the elapsed year (PY) is calculated using the same calculation as in #109.

Next, proceed to #112, where the value of elapsed years (PY) is “
It is determined whether the value is positive or negative. As a result"
If it is "correct", the reference date has been set correctly, so in #113 the output of the output boat WARN is left at the L level, and then the process goes to #114 where the value of the elapsed year (PY) is set. It is determined whether the current date is rOJ, that is, whether one year has passed since the set reference date. If PY≠0 (one year or more), the output boat YM/MOCTRL is determined in #115. For the display switching decoder 25, the display 23 that displays the upper digits (PH) of elapsed time displays the elapsed palm reading (PY), and the display 24 that displays the lower digits displays the elapsed moon phase. Outputs a signal like that. Therefore, in #118, the output boat YM
By setting the output of /MOCTRL to L level, the displays 23 and 24 display "~y -m J", and the same operation is repeated thereafter.The overall display in this case is, for example, "2 If 10 months have passed since then, then r 2ylOmJ will be displayed.

In addition, in #114, if PY=O (less than one year), in #117, the output port YM/MOCTRL sends a message to the display switching decoder 25 on the display 23 that displays the upper digit (PH) of the elapsed time. indicates the elapsed lunar phase (PY), and the elapsed date digit is 1. on the display 24 that displays the lower digit. Each outputs a signal as displayed. Therefore, by setting the output of the output boat YM/MOCTRL to L level in #119, the display bodies 23 and 24 display "~mx
dJ is displayed, and the same operation is repeated thereafter.

In this case, if "10 months and 29 days" have passed, the overall display will be rlom29dJ.

On the other hand, if it is determined in #112 that the elapsed year (PY) value is "negative", the reference date has been incorrectly set after the current date, so the process proceeds to #116 and is immediately output. The output of the boat WARN is set to H level, and the LED 30 is turned on via the driver circuit 29 to notify the user.

Each counter in the current day counter A has a carry-in and a carry-out connected to each other, and when the pulse every other day output from the day pulse generation circuit 8 is input to the day digit counter 11, a normal calendar is generated. It goes without saying that the current date is incremented as time passes, and the elapsed time display is also incremented accordingly.

FIG. 6 is a flowchart showing the operation of another embodiment of the present invention. In the embodiment described above, if the reference date is incorrectly set after the current date, the LED 30 is turned on to warn of this fact. However, here, it is "0 month 0 day", that is, if such a situation occurs, r On O
The purpose is to uniquely display dJ and use this as a warning display, and this is carried out by #112-#
216→#117→#119.

By configuring as described above, it produces a power saving effect more than lighting the LED 30, and it also does not cause confusion to the user or complicate the structure compared to the case where "negative" is displayed. There is no fear that it will happen.

(Correspondence between the invention and the embodiments) In the embodiments of FIGS. 1 to 5, #112. The part that executes the operations #113 and #116 serves as a control means, the driver circuit 29 and the LED 30 serve as a warning display means, and in the embodiment of FIG. 6, #112. #1
The parts that execute the operations #13 and #216 respectively correspond to display instruction means.

(Effects of the Invention) As explained above, according to the present invention, when the data from the calculation means is data of a positive value meaning elapsed time, the elapsed time data is displayed on the numerical display means. ,
If the data is a negative value, a control means for generating a warning display signal indicating that the data is not elapsed time data, and a warning display means for displaying a warning upon generation of the warning display signal are provided. If the reference date is set after the current date, a warning is displayed, so that it is possible to immediately notify of an incorrect operation in setting the reference date.

Further, according to the present invention, if the data from the calculation means is a positive value representing an elapsed time, the elapsed time data is displayed, and if the data is a negative value, a numeric value is displayed. A display instruction means is provided to set the display by the display means to zero, so that the numerical display means for displaying the elapsed time can also be used as a warning display means without adding any special function, and the warning display can be set to zero. By using this, a warning display when an erroneous operation is performed can be displayed at low cost and in an easy-to-understand manner.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing the correspondence between the boat address of each input/output port of the CPU shown in FIG. 1, the memory address in the RAM, and its contents; Figure 3 shows the first year determined by the base year and base column.
FIG. 4 is a diagram showing the output state output from the illustrated month-end correction circuit to the CPU, FIG. 4 is a diagram showing the structure of the illustrated display switching decoder shown in FIG. Flowchart showing the operation of the embodiment, No. 6
The figure is a flowchart showing the operation of another embodiment of the present invention. 1...CPU, 4...-RAM, 8...
...Date pulse generation circuit, 29...Driver circuit, 30...LED, A...Current date counter, B...Reference date setting counter , C...
...Elapsed time display section. Patent applicant: Canon Co., Ltd.

Claims (2)

[Claims] (1) A counting means for counting the current year, month, and day; a reference date storage means for storing the year, month, and day of a reference date set by external operation; and a counting means for counting the current year, month, and day; An elapsed time display device comprising an arithmetic means for subtraction and a numerical display means for displaying data from the arithmetic means, wherein the data from the arithmetic means is positive value data indicating elapsed time. control means for causing the numerical display means to display the elapsed time data; and for generating a warning display signal indicating that the elapsed time data is not the elapsed time data when the data is a negative value; 1. An elapsed time display device comprising a warning display means for displaying a warning when a warning occurs. (2) Counting means for counting the current year, month, and day; reference date storage means for storing the year, month, and day of a reference date set by external operation; and a counting means for counting the current year, month, and day; An elapsed time display device comprising an arithmetic means for subtraction and a numerical display means for displaying data from the arithmetic means, wherein the data from the arithmetic means is positive value data indicating elapsed time. If so, display the elapsed time data,
An elapsed time display device characterized in that a display instruction means is provided for setting the display by the numerical display means to zero when the data is a negative value.