JPS5924360A - Display system of dominical year - Google Patents

Abstract

PURPOSE:To reduce a display area, by using 3 digits for display of the dominical years, activating or inactivating the highest digit in response to the years of 1,900 or 2,000 and showing the last two digits of a year with the hollowing two digits. CONSTITUTION:For an electronic calculator which performs the four rules of arithmetic, the divination, a time display etc., the operations are performed by incorporated ROM and RAM and the results of operations are displayed. When a calling instruction of date is inputted, it is decoded whether the date belongs to 1,900 or 2,000 years. When the date belongs to the 1,900 years, the highest place of a display part is activated to display an apostrophe. While the highest place of the display part is blank in the case of the 2,000 years. The following two digits shown the last two digit of a year. This can save one display digit. The figure shows December 31, 1982.

Description

[Detailed description of the invention] ``Kidori'' relates to the method of displaying the year of the Western calendar.

Conventionally, in order to represent the years in the West @1900s and 2000s, the display digits DI, D3 . Using D4, 2000
When the year is displayed, the display digits are D2°D3. I am using D4. In another prior art, as shown in FIG. 1(2), four display digits D5. D8 indicates the year of the Western calendar. In such prior art, the display digits Di, 112 . I.J.
5, and also requires a large display area. Therefore, in order to display the year of the Western calendar, 7 is used to display the numbers used in Km, a military type desk meter with a clock, clocks, cash registers, and other devices.
Display digits with day segment in B font oJ
It is desired that the year be represented using as few numbers as possible.

The object of the present invention is to provide a display method that reduces the display area and displays the year by display digits with segments capable of displaying existing numerals.

FIG. 2 is a block diagram of an embodiment of the present invention, and FIG. 3 is a front view of the display 2 included in the embodiment. A display digit 2 and a key manual means 3 are connected to a processing device 4 realized by a microcomputer or the like. The processing device 4 performs processing operations to achieve the functions of a fortune-telling device, an electronic desktop calculator, a clock cash register, and the like. From the key manual means 3, information such as numerical values such as the year of the Christian calendar is input by manual operation. The display unit 2 has a plurality of (
In this embodiment, the display digits Dll-D19 of 9) are arranged horizontally adjacent to each other.1, these display digits Dll-D19
has a 7B7 ont day segment that can display numbers. In order to identify the segments of each display digit Dll to D19, as shown in FIG.
The reference mark DP corresponding to g and the decimal point is used.

In the processing device 4, a program for fortune-telling and the like are written in advance in the read-only memory 15. The processing device 4 performs fortune-telling operations and functions as an electronic desktop calculator in accordance with signals from the key human power means 3 and programs stored in the read-only memory 15. Random access memory 1
6 stores the signal to be displayed by the display 2. The inner worlds stored in this random access memory 16 are segments a-g of the display 2.

1) It corresponds to P differently. Random access memo IJ
17 stores information inputted by the key manual means 3, subtraction results, year, month, day, and time. The above-described random access memory 16 has almost the same configuration as the random access memory 17 except that it functions as a panther register for the display 42. Arithmetic operations in the processing device 4 are performed in an arithmetic circuit 18 including an accumulator and an arithmetic unit. , drive circuit 1! l'J
, including gates and buffers for driving the display 2, converting the data from the random access memory 16 into a format suitable for driving the display 2. From time 1@20, the key strobe signal is input to the key human power means 3, and the signal from the key human power means 3 is 7 lip 70 knob 21.
received a good reputation. .

FIG. 5 shows the random access memory 1 for the display 2.
6 is shown in detail. This random access memory 16 is
It has two files G and H, each file has a reference number 0 to
9. It consists of 16 digits shown as A-F, and each file G,
Each H digit has 4 bits weighted 1.2°4.8. The display digit Dll-D19 shown in FIG.
Figure 5: Random access memory 16 digit F,
E.

They individually correspond to D, . . . , A, 9, 8, and 7.

Referring to FIG. 6, in step nl, the year 1900s or 2000s expressed in the Western calendar is set by operating the key human power means 3.

In step n2, the processing device 4 detects which key 75 has been pressed, and this content is stored in the random access memory 17.
Stored in In step n3, it is determined whether the numerical value stored in the random access memory 17 indicates an arithmetic command for the electronic desktop calculator. When the true information entered by the key is a calculation command for the electronic desk calculator, the process moves to step n4, where the electronic desk calculator performs calculation processing, and the calculation result is displayed on the display 2 at step n5. .

If no arithmetic command for the electronic desktop calculator has been generated based on the information input by the key manual means 3, the process moves from step n3 to step n6, where it is determined whether a time calling command has been issued.

When the information inputted by the key manual means 3 is a time uP input command, the current time is read from the random access memory 17 in step n7. The calculation circuit 18 calculates and decodes the 11Y output result, and transfers the calculation result to the random access memory 16. Thus, in step n8, the display 2 displays the current time using display digits 1)ll-1)19.

In step n6, if a time call command has not occurred based on the information input from the key manual means 3, the process moves to step n9, and it is determined whether a date call command has occurred. If the information is for a date recall command, the process moves to step nlO, where the H-phase data stored in the random access memory 17 is recalled from the random access memory 17, and the arithmetic circuit 18 performs calculations and decoding, and the decoding result is obtained. is transferred to the random access memory 16. Next, information representing the date stored in the random access memory 17 is displayed at 190.
It is checked in step nil whether it is the 0's. When the information to be displayed is the 1900's, the process moves to step n12, and bit b having 20 digits in the digit indicated by reference numeral F of file number 1 in random access memory 16 is set. This is an operation equivalent to storing 2. Note that the random access memory 16 is completely reset in advance in its initial state. Since bit b of the digit indicated by reference sign F is logical rlJ, segment b of the highest digit D11 is activated at input step n14, which will be described later. The reference numerals indicating the segments shown in FIG. 4 and the reference numerals indicating the bit store area of the random access memory 16 are the same for ease of understanding.

In step nil, the date data to be displayed is 19
If it is not the 00's, then the process moves to step n13 when it is the 20()0's. In step n13, all bits a to g of the digit indicated by reference mark F of file H,
Logic "0" is written to DP. Thus, the most significant digit D
Any segments a-g, DP of ll become -1-1 in an inactive state.

After steps n l 2 and n 13 are completed, the process moves to step n14, where digit F of file G in random access memory 16 is cleared to logic "0".

To summarize, due to the creation of MJ in steps n1l-n14, in step n14, segment b of the most significant digit Dll will be fully activated and an apostrophe will be displayed when representing the year in the 1900s. , nothing can be displayed in the most significant digit Dll. The consecutive display digits Di 2 and DI3 following the most significant digit Dll include 1900s and 2000s.
The last two digits of the year can be displayed. For example, in Figure 3,
December 31, 1982 is displayed.

Next, the process moves to step n15 and enters a standby state.

This standby state is canceled by operating the key manual means 3.

As described above, according to the present invention, the year is displayed using a display digit having a segment capable of displaying at least three numbers, so that the display area can be reduced, and it is possible to use a fortune-telling device, a watch, etc. Display digits used in electronic desk calculators, clocks, cash registers, and other electronic devices that display numbers.
This can be used to represent the year according to the Western calendar, and there is no need for a display digit with a special middle segment for representing the year, as in the prior art mentioned by Mfj.

[Brief explanation of drawings]

FIG. 1 is a front view showing the display state of the prior art, FIG. 2 is a block diagram of an embodiment of the present invention, FIG. 3 is a front view of the display 2, and FIG. 4 is the display shown in FIG. 3. FIG. 5 is a diagram showing the specific structure of the random access memory 16, and FIG. 6 is a flowchart for explaining the operation. 2...Display device, 3...Key manual means, 4...Processing device, 15...Read only memory, 16.17...
・Random access memory, 18... Arithmetic circuit, 19
...Drive output, Dlj-Dl9-...Display digit, a~glDP...Segment agent Patent attorney Kei Nishi part! D2 Figure 1 Figure 3

Claims (1)

[Claims] At least three segments having segments for displaying numbers.
A display device consisting of digit display digits arranged in an array; a means for deriving a signal representing the year; If the year is either the 1900s or the 2000s, one of the predetermined segments of the most significant digit is activated, and either and means for keeping the most significant digit in an inactivated state.