JP2001273266A - Information processor, method and device for display therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently display the numerical value of a memory or other numerical value on plural lines. SOLUTION: An LCD display 2 has a first line display area 2a and a second line display area 2b. At the time of tax calculation, an amount before tax, amount after tax or amount of tax is displayed on two display areas at the same time. On the left side of the display area, the symbol of 'before tax' is displayed as well. When a numerical value, which is not '0', is stored in the memory at the time of ordinary calculation, that numerical value is displayed on the side of upper stage together with the symbol of 'M' and an argument or calculated result is displayed on the side of lower stage. When the numerical value of the memory is '0', a last answer is displayed on the side of upper stage and the symbol of 'answer' is displayed as well.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus represented by an electronic desk calculator and the like, and a display method and a display apparatus therefor.

[0002]

2. Description of the Related Art Conventionally, information processing apparatuses such as electronic desk calculators, portable information terminals abbreviated as PDAs (Personal Digital Assistants), and personal computers have been widely used. An electronic desk calculator in which portability and cost are emphasized has a display device for displaying a numerical value with a plurality of digits at a minimum.
In addition, while performing normal calculations including addition, subtraction, multiplication, and division in accordance with the user's input operation to the key input device, etc., display the numerical values such as the input numerical value and the calculation result Display on the device. In a complicated calculation, for example, to temporarily store numerical values in the middle or to store numerical values that are used many times repeatedly, to input numerical values by user's input operation or to perform arithmetic processing May be provided. In an ordinary electronic desk calculator capable of displaying a numerical value for one line, a numerical value once stored in a memory cannot be displayed unless an arithmetic process for reading a numerical value from the memory is performed.

[0003] Japanese Patent Application Laid-Open No. 1-140366 has two display sections, so that only one display section is normally used, and when the contents of the memory are displayed, the other display section is used. A configuration of an electronic desk calculator is disclosed. In addition, Japanese Utility Model Laid-Open No.
A configuration is disclosed in which two display units are provided, and one display unit constantly displays the contents of a memory, and the other display unit displays calculation results and the like.

[0004]

Problems to be Solved by the Invention
No. 6 and Japanese Utility Model Application Laid-Open No. Sho 60-170860 have two display units, on the other hand, which can display the contents stored in the memory. Since the unit can only display the contents of the memory, the display unit cannot be used effectively when a numerical value is not stored in the memory.

Further, the electronic desk calculator has a function of performing a tax calculation related to a consumption tax, a currency conversion between currencies of various countries, a conversion between various units, and the like by a simple input operation. There is something. Even in such an electronic desk calculator having a specific calculation function, for example, as disclosed in Japanese Utility Model Laid-Open No. 5-59543 and Japanese Patent Laid-Open Publication No. 64-12363, different types of numerical values It has been considered to have a function of simultaneously displaying.

[0006] Further, as in the configuration disclosed in Japanese Utility Model Application Laid-Open No. 5-59543 and Japanese Patent Application Laid-Open No. 64-12363, even if a specific calculation can display a plurality of lines of numerical values, the specific calculation does not. There is no ordinary calculation that cannot effectively utilize the display of multiple lines.

An object of the present invention is to provide a display device for a plurality of rows, capable of displaying numerical values in a memory,
An object of the present invention is to provide an information processing apparatus capable of effectively displaying other numerical values when a numerical value in a memory is not displayed, a display method thereof, and a display device.

[0008]

According to the present invention, there is provided an input device for receiving a user's input operation, a memory for storing a numerical value based on a predetermined input operation to the input device, and a display area capable of displaying the numerical value. In an information processing apparatus including a display device having a plurality of lines, according to an input operation to the input device,
An arithmetic means for executing arithmetic processing including four arithmetic operations, and display control means for displaying an arithmetic processing result of the arithmetic means on a display device, wherein when a numerical value is stored in a memory, the numerical value is displayed on the display device. When a numerical value is not stored in the memory, the final calculation processing result of the calculation means is displayed in the predetermined display area, and the result of the final calculation processing is displayed in the predetermined display area. An information processing apparatus comprising: a display control unit configured to control a numerical value corresponding to an input operation to an input device and a calculation process of a calculation unit in a display area other than a predetermined display area.

According to the present invention, the information processing apparatus includes an input device for receiving a user's input operation, a memory for storing a numerical value based on a predetermined input operation to the input device, and a display capable of displaying the numerical value. A display device having an area for a plurality of rows, and further includes a calculation unit and a display control unit. The arithmetic unit executes arithmetic processing including four arithmetic operations according to an input operation to the input device. The display control means, when displaying the result of the arithmetic processing by the arithmetic means on the display device, can identify that the numerical value is stored in the memory in a predetermined display area of the display device when the numerical value is stored in the memory. And when no value is stored in memory,
The final calculation result of the calculation means is displayed in a predetermined display area. The display control means controls to display a numerical value corresponding to an input operation to the input device and a calculation process of the calculation means in a display area other than a display area predetermined on the display device. If a numerical value is stored in the memory, the numerical value is displayed in a predetermined display area of the display means, and if no numerical value is stored in the memory, the final calculation processing result of the calculating means is displayed. Numerical values can be displayed using the display area effectively. When the numerical value stored in the memory is displayed, it is displayed so as to be identifiable as the stored content of the memory, so the numerical value displayed in the predetermined display area is the numerical value stored in the memory. Whether or not there is can be easily identified.

Further, in the present invention, the arithmetic means includes a normal calculation mode for executing arithmetic processing including the four arithmetic operations in accordance with a predetermined input operation to the input device, and a specific calculation mode for executing a predetermined type of specific arithmetic processing. And the display control means, when the arithmetic means is switched to the specific calculation mode, the numerical value stored in the memory, the input operation to the input device, and the arithmetic processing of the arithmetic means. Is controlled so that the numerical value of the result of the specific arithmetic processing and the predetermined numerical value related to the result are displayed in a state in which it can be identified that the numerical value is related to the specific arithmetic processing, instead of displaying the numerical value corresponding to It is characterized by doing.

According to the present invention, the arithmetic means includes a normal calculation mode for executing arithmetic processing including four arithmetic operations and a specific calculation mode for executing a predetermined type of specific arithmetic processing in accordance with a predetermined input operation to the input device. Can be switched to
The display control means, when the arithmetic means is switched to the specific calculation mode, instead of displaying the numerical value stored in the memory and the numerical value according to the input operation to the input device and the arithmetic processing of the arithmetic means, A numerical value resulting from the specific arithmetic processing,
Control is performed so that a predetermined numerical value related to the result is displayed in a state where it is identifiable that the numerical value is related to the specific arithmetic processing. In the specific calculation mode, the numerical values related to the specific operation are displayed in a plurality of display areas in a state where they can be identified, and the display device is used effectively in a state where the correspondence between the relevant numerical values is easily understood. Can be.

In the present invention, the calculation means performs tax calculation as the predetermined type of specific calculation processing, and the display control means calculates a tax-excluded amount and a tax-excluded amount or a tax amount based on the tax calculation by the calculation means. It is characterized in that it is controlled so as to be displayed on a tax display device.

According to the present invention, the tax calculation can be performed as a specific calculation process, and the display device displays the tax-included amount and the tax-excluded amount or the tax amount by using a display area of a plurality of lines based on the tax calculation. Can be displayed.

In the present invention, the calculating means performs currency conversion as the predetermined kind of specific calculating processing, and the display control means is expressed in a plurality of kinds of currencies based on the currency conversion by the calculating means. It is characterized in that the amount is controlled to be displayed on the display device.

According to the present invention, the currency conversion can be performed as a specific calculation process, and the display device displays the amounts of money represented by a plurality of kinds of currencies in an easy-to-understand manner using a plurality of display areas. Can be.

Further, in the present invention, the arithmetic means performs unit conversion as the predetermined type of specific arithmetic processing, and the display control means is expressed in a plurality of types of units based on the unit conversion by the arithmetic means. A numerical value is controlled to be displayed on the display device.

According to the present invention, unit conversion, such as between the metric system and the imperial system, can be performed as the specific arithmetic processing.
Since numerical values represented by a plurality of types of units can be displayed at the same time, the correspondence between the units can be displayed in an easily understandable manner.

Further, the present invention provides an input device for receiving a user's input operation, a memory for storing a numerical value based on a predetermined input operation to the input device, and a display having a plurality of display areas capable of displaying the numerical value. In a display method of an information processing device including a device, in accordance with an input operation to an input device,
The calculation processing mode can be switched between a normal calculation mode including four arithmetic operations and a specific calculation mode for performing a predetermined specific type of calculation. In the specific calculation mode, the specific calculation mode is displayed in a display area for a plurality of rows of the display device. A plurality of types of numerical values related to the types of calculations are displayed so as to be identifiable. In the normal calculation mode, when the numerical values are stored in the memory in a predetermined display area of the display device, the stored contents are displayed. When the numerical value is not stored in the memory, the last arithmetic processing result is displayed in a display area different from the predetermined display area, and the numerical value related to the arithmetic including the four arithmetic operations corresponding to the input operation to the input device is displayed. Are displayed so as to be identifiable, respectively.

According to the present invention, when a display is performed by an information processing apparatus having a display device having a plurality of lines of display areas capable of displaying numerical values, four types of operations are performed according to an input operation by a user to the input device. The arithmetic processing mode is switched between a normal calculation mode including an arithmetic operation and a specific calculation mode for performing a predetermined specific arithmetic operation, and the display on the display device is also switched according to the arithmetic processing mode. In the specific calculation mode, a plurality of types of numerical values related to a specific type of calculation are displayed in a display area for a plurality of rows of the display device so that they can be identified. As a specific type of calculation, for example, tax calculation, currency conversion, unit conversion, and the like are possible, and the corresponding numerical values can be displayed at the same time, so that the result of the specific type of calculation can be displayed in an easily understandable manner. In the normal calculation mode, when a numerical value is stored in the memory, the stored content is displayed in a predetermined display area of the display device, and when the numerical value is not stored in the memory, the last calculation result is displayed. In a display area different from the display area, numerical values related to calculations including four arithmetic operations and the like are identifiably displayed in accordance with input operations to the input device. Since the contents stored in the memory or the final calculation result can be displayed in the predetermined display area, the display can be performed by effectively using the display device.

Further, the present invention is an information processing apparatus having an input device for receiving a user's input operation and a memory for storing a numerical value based on a predetermined input operation to the input device, provided for displaying a numerical value. In the display device of the information processing device, a display area capable of displaying numerical values, a plurality of numerical segments arranged to form a plurality of rows,
Of the display area formed by the numeric segments,
A memory segment for displaying a symbol for identifying the storage contents of the memory, which is arranged so as to be in the vicinity of a predetermined display area, and identifying a numerical value related to a predetermined specific type of operation A plurality of segment signal lines selectively connected according to a predetermined combination with a specific calculation segment for, a numerical segment, a memory segment and a specific calculation segment,
A predetermined combination of a numerical segment, a memory segment, and a specific calculation segment so that a numerical value can be displayed in a numerical segment and a symbol can be displayed in a memory segment and a specific calculation segment in combination with a segment signal line. Including a plurality of common signal lines selectively connected according to, the segment signal line and the common signal line, by switching of the predetermined selection, to select one of the memory segment and the specific calculation segment,
A display device of an information processing device, which is capable of displaying.

According to the present invention, an information processing apparatus provided with a display device includes an input device for receiving a user's input operation, and a memory for storing a numerical value based on a predetermined input operation on the input device. The display device includes a plurality of numerical segments, a memory segment, a specific calculation segment, a plurality of segment signal lines, and a plurality of common signal lines. The plurality of numerical value segments are arranged so as to form a display area capable of displaying numerical values for a plurality of rows.
The memory segment is arranged so as to be in the vicinity of a predetermined display area in the display area formed by the numerical value segments, and is used for displaying a symbol for identifying the stored content of the memory. The specific calculation segment is used for displaying a symbol for identifying a numerical value related to a predetermined specific type of operation.
The plurality of segment signal lines are selectively connected to a numerical segment, a memory segment, and a specific calculation segment in accordance with a predetermined combination. A plurality of common signal lines are combined with a segment signal line to display a numerical value with a numerical segment and a symbol with a memory segment and a specific calculation segment so that a numerical segment, a memory segment, and a specific segment can be displayed. The connection is selectively made according to a predetermined combination of calculation segments. Since the segment signal line and the common signal line can be selectively displayed by switching between predetermined selections, either the memory segment or the specific calculation segment can be displayed.
The identification of the displayed contents, including the display of the stored contents of the memory, is performed between the time of performing a predetermined type of predetermined calculation in the arithmetic processing in the information processing device and the time of performing a numerical calculation such as a normal four arithmetic operation. While displaying and performing the segment and the segment for specific calculation, it is possible to easily switch and display the segment.

Further, the present invention is a computer-readable recording medium in which a program for causing a computer to function is recorded as any one of the information processing apparatuses described above.

According to the present invention, when a computer functions as an information processing apparatus having a display device having a plurality of lines of display areas capable of displaying numerical values, the display area of a plurality of lines of the display device is effectively used. However, the present invention can be effectively used for displaying the contents stored in the memory, displaying the final calculation result, or simultaneously displaying a plurality of numerical values corresponding to a specific type of calculation.

[0024]

FIG. 1, FIG. 2 and FIG. 3 show the external configuration of electronic desk-top computers 1, 11, 21 according to the first, second and third embodiments of the present invention, respectively. The electronic desk calculators 1, 11, 21 of the embodiments are provided with LCD displays 2, 12, 22 including a liquid crystal display device (hereinafter abbreviated as “LCD”). LCD display 2, 1
2 and 22 have first line display areas 2a, 12a and 22a and second line display areas 2b, 12b and 22b, and can simultaneously display numerical values for two lines. Hereinafter, the present invention will be described with reference to the case where the LCD displays 2, 12, and 22 having a display area for two rows are used in the electronic desk calculators 1, 11, 21. However, in place of the electronic desk calculators 1, 11, 21. Thus, the present invention can be similarly applied to information processing apparatuses such as pocket computers, portable information tools, and electronic memos. Furthermore, an electronic desk calculator realized by application software such as a personal computer may be used.

On the surfaces of the electronic desk calculators 1, 11, and 21, not only are the LCD displays 2, 12, and 22 exposed, but also various operation keys are provided on the keyboards 3, 13, and 23.
It is provided as. The keyboards 3, 13, and 23 include, for example, a numeric key for entering numbers from 0 to 9, a decimal point key for entering a decimal point, addition (+), subtraction (-), multiplication (x) and The key includes an arithmetic key for performing division (÷), an equal (=) key for obtaining the arithmetic result, and the like. In addition, clear (C · CE) key,
A memory key (CM / RM / M- / M +) key and an all clear (CA) key are provided. On the display surfaces of the LCD displays 2, 12, and 22, numerical values and calculation results input by these keys and the electronic desk calculators 1, 11, and 22 are displayed.
A symbol or the like indicating the state of 21 is displayed.

The electronic desk calculator shown in FIG. 1 has a tax calculation mode related to a consumption tax in addition to the usual four arithmetic functions. Further, the electronic desk calculator 12 of FIG. 2 has a currency conversion mode for performing currency conversion between a foreign currency and a yen in addition to a normal calculation mode. The electronic desk calculator 21 of FIG.
Has a conversion mode between European euros and local currencies in addition to the usual calculations.

FIG. 4 shows an electrical configuration common to the electronic desk calculators 1, 11, 21 shown in FIGS.
The electronic desk calculators 1, 11, 21 control the keyboards 3, 13, 23 having the above-mentioned respective keys, and the above-mentioned LCD displays 2, 12, 22 constituting a display device by the microcomputer 30. 1,11,21
Function is realized. The microcomputer 30 is a so-called one-chip microcomputer, and includes a CPU 31, a ROM 32, a RAM 33, and the like. The CPU 31 controls the overall operation of the electronic desktop computers 1, 11 and 21 according to a control program stored in the ROM 32. For example, it controls reading processing of various keys, arithmetic calculation processing, and output processing of various calculation results. Therefore, the ROM 32 stores control programs necessary for these processes. R
The AM 33 is used for temporarily storing various data. The memory functions of the electronic desk calculators 1, 11 and 21 are also realized by using the RAM 33. The ANS memory for storing the final answer also uses the RAM 33.
The microcomputer 30 has a plurality of terminals,
The terminals are connected to terminals of the keyboards 3, 13, 23 and the LCD displays 2, 12, 22 respectively.

The microcomputer 30 receives operation power from the solar cell 4 or the battery 35 of the power supply 34. Power from the solar cell 4 is provided via a resistor 36. When the output voltage of the solar cell 4 is sufficient, the light emitting diode (LED) 37 is turned on. When the power generated by the solar cell 4 is low, power is supplied from the battery 35 via the diode 38. If the output voltage of the solar cell 4 is high, the diode 38 becomes reverse-biased, so that backflow to the battery 35 can be prevented. Battery 3
5 can also be avoided.

An external storage device 39 is also connected to the microcomputer 30. The external storage device 39 can read a recording medium such as an IC card, a floppy disk, or a CD-ROM, for example, as described later.
Data and programs can be entered. RO
If the M32 is an electrically rewritable memory such as a flash memory, the program read from the external storage device 39 can be used to upgrade the version of the program operated by the CPU 31. Also, the external storage device 39
In addition to reading programs and data from a recording medium, the program and data can be downloaded by connecting to the Internet or the like via a modem or the like. In this case, the download program may be stored in the ROM 32 in advance.

The microcomputer 30 is reset (RE
An all clear (CA) key 40 is connected to the (SET) terminal. When the CA key 40 is turned on, the microcomputer 30 is reset, and programs and data are initialized. The power supply 34 is also connected with a bypass capacitor 41 for noise prevention and voltage generation.

The recording medium readable by the external storage device 39 may be a program medium readable by being inserted into the external storage device 39. Such a program medium is a recording medium configured to be separable from the main body of the external storage device 39, such as a tape system such as a magnetic tape or a cassette tape, a magnetic disk such as a floppy (registered trademark) disk or a hard disk, or a CD-ROM. ROM / MO / M
A medium that fixedly holds a program, including a disk system of an optical disk such as a D / DVD, a card system such as an IC card, a memory card, or an optical card, and a semiconductor memory such as a mask ROM, an EPROM, an EEPROM, and a flash ROM. Can be used.

FIG. 5 shows LCDs provided in the electronic desk calculators 1, 11, 21 shown in FIGS. 1, 2 and 3, respectively.
The connection terminals of the display units 2, 12, 22 are shown. H1 to H6 are terminals for common signal lines, and S6, S5, S4, S3
And each terminal of a8, b8, c8 to a1, b1, c1
Terminal for the segment signal line. LCD display 2, 1
Reference numerals 2 and 22 denote a first row display area 2a, 12a, and 22a and a second row display area 2b, 12b, and 22b.
Column display can be performed.

FIG. 6 shows a key matrix for the keyboards 3, 13, and 23. The key matrix includes S6, S5, c8, b8, a8, c7,
Using the outputs of b7, a7, c6, b6, KL4, KL
From the change in the input of 3, KL2 and KL1, the type of the pressed key can be known. The clear (C / CE) key also functions as a power ON key. Further, the key for "tax included / excl. Tax" shown in FIG. 1, the key for "rate setting" shown in FIG. 2, and the key for "RATE SET" shown in FIG. , But use only one each. The “M +” key is connected to another position in FIGS. 1, 2 and 3. Thus, as will be described later, conversion between a foreign currency and a yen, and conversion between a European common currency, Euro, and each country's currency can be performed in the same manner as long as the conversion rate is set.

An "answer" key provided on the keyboards 3, 13 and an "ANS" key provided on the keyboard 23 are provided for executing the last answer function.
This last answer function is a function of storing a calculation result in a last answer memory and reading out the calculation result later.

FIG. 7 shows the first row display areas 2a, 12a, 22a and the second row display area 2 of the LCD displays 2, 12, 22.
This indicates that the key matrix can be used to specify the decimal point position when displaying numerical values in b, 12b, and 22b, and to specify rounding, rounding down, or rounding up. The electronic desk calculator 1 of each embodiment of FIGS.
In 11 and 21, since this function is not used, an OPEN state is set, and floating point display and rounding are designated.

FIGS. 8, 9 and 10 show FIGS. 1 and 2 respectively.
And an LCD display 2 used in each embodiment shown in FIG.
The display surfaces 12 and 22 are respectively shown in an enlarged manner. In the LCD display 2 shown in FIG. 8, numerical display of eight digits can be performed in the display areas 2a and 2b for two rows. On the left side of the first line display area 2a, three symbols of "tax included", "-", and "tax rate" are arranged. On the right side of the first line display area 2a, three symbols “M”, “setting”, and “answer” are arranged. On the left side of the second line display area 2b, three symbols “excl. Tax”, “−” and “=” are arranged. On the right side of the second row display area 2b, two symbols “%” and “E” are arranged. LC shown in FIG.
In the D display 12, on the left side of the first line display area 12a,
Three symbols of "yen", "-" and "rate" are arranged, and a symbol indicating conversion to "yen", a symbol indicating conversion to "foreign currency", a symbol of "M" and "setting" are provided on the right side. Is arranged. Second line display area 12
On the left side of b, three symbols of “foreign currency”, “−” and “=” are arranged, and on the right side, three symbols of “answer”, “%” and “E” are arranged. L shown in FIG.
On the left side of the first line display area 22a of the CD display 22, a symbol indicating a local currency, a symbol of "-" and a symbol of "RATE" are arranged, and on the right side, conversion into local currency is performed. , A symbol indicating conversion to euro, a symbol “M”, and a symbol “SET” are arranged, respectively.
On the left side of the second line display area 22b, a symbol indicating a euro currency, a symbol of "-", and a symbol of "=" are arranged, and on the right side, a symbol of "ANS", a symbol of "%", and a symbol of "E". Is arranged.

FIG. 11 shows a configuration of a display surface of an LCD display 42 according to a fourth embodiment of the present invention. Fourth of implementation
The embodiment uses only the storage contents of the memory without performing tax calculation or currency conversion as a specific calculation function as in the electronic desk calculators 1, 11, 21 of the embodiments shown in FIGS. 1, 2, and 3. The display is performed using the two-stage display areas 42a and 42b. Therefore, only the symbol "-" is arranged on the left side of the first row display area 42a, and only the symbol "M" is arranged on the right side. Two symbols “−” and “=” are arranged on the left side of the second row display area 42b, and one symbol “E” is arranged on the right side.

FIGS. 12 and 13 show the LCD shown in FIG.
Common signal lines H1, H2, H3, H4, H5, H to the electrodes of the display segments constituting the display surface of the display 2
6 and segment signal lines S6, S5, S4, c8, b
8, a8,..., C1, b1, and a1 are shown, respectively. H1, H2, H3 for the first row display area 2a
, And H4, H5, and H6 common signal lines are assigned to the second row display area 2b. Three segment signal lines a, b, and c are respectively assigned for numerical display of each digit in the first row display area 2a and the second row display area 2b.
And two segment signal lines of S5 are assigned, and the segment signal line of S4 is assigned to the right symbol. The segment signal line S6 is connected to three segments of “tax included”, “−” and “tax rate”, and a segment of “tax” of “excluding tax”. The segment signal line S5 is connected to the “excluded” symbol and the “−” and “=” symbols among the “excluding tax” symbols. FIG.
Each numerical value and each symbol can be displayed by a combination of signal lines as shown in FIG. 2 and FIG. Also, with the symbol "excl. Tax", only "tax" alone can be displayed.

FIGS. 14 and 15 show the LCD shown in FIG.
The electrodes of the symbols constituting the display surface of the display unit 12, the common signal lines H1, H2, H3, H4, H5, H6 and the segment signal lines S6, S5, S4, c8, b8, a8,
.., C1, b1, a1, S4, and S3 indicate connection states with the segment signal lines, respectively. The symbol for conversion to a circle and the symbol for conversion to a foreign currency provided on the right side of the first row display area 12a are connected to a common signal line H1, but the segment signal lines are divided into S3 and S4. Connecting. As a result, conversion into yen and conversion into foreign currency can be displayed separately.

FIGS. 16 and 17 show the LC shown in FIG.
The connection state of the electrodes of the display segment forming the display surface of the D display 22 and the connection states of the common signal line and the segment signal line are shown. In FIGS. 16 and 17, the “yen” symbol shown in FIGS. 14 and 15 corresponds to the local currency symbol, and the symbol corresponding to “foreign currency” corresponds to the euro symbol. It is possible to separately display a symbol representing conversion to local currency and a symbol representing conversion to euro. The configuration of the display surface of the LCD display 42 shown in FIG. 11 can be realized by simplifying the configuration shown in FIGS.

As shown in FIGS. 12 to 17, in the segment electrode group for displaying numerical values, seven rod-shaped electrodes are arranged in the shape of "8", and the combination thereof can represent the numbers 0 to 9. it can. A circular electrode representing a decimal point is disposed at the lower right of the electrode group having the shape of “8”, and an electrode representing “′” may be disposed at the upper right. The specifications of the four arithmetic calculations, the tax calculation, and the currency conversion have the same configuration except that the symbol shape of the display electrode is different. That is, the substrate, the segment signal lines S3, S4, S6, a1 to a8, b1 to b8, c1
To c8 and the common signal lines H1 to H6 are the same. In this way, the display electrodes and the segment signal lines S3, S4, S5, S
6, a1 to a8, b1 to b8, c1 to c8 and the common signal lines H1 to H6.
Display can be performed by efficient control by U31.

A method of manufacturing the LCD displays 2, 12, 22 will be described. The display of each specification of the four arithmetic calculations, the tax calculation, and the currency conversion is configured similarly except that the symbol shape of the display electrode is different. That is, the substrate and the segment signal lines S3, S4, S5, S6, a1 to a8, b1 to b
8, c1 to c8, the common signal lines H1 to H6, and the microcomputer 30 are common, so that a common portion is formed on the substrate, and then a different portion is formed according to each specification. 12, 42 can be manufactured efficiently.

That is, in the LCD display 2 for tax calculation processing shown in FIGS. 12 and 13, the connection of the "tax included" electrode to the segment signal line S6 and the connection of the common signal line H1 are performed. Connection between the "tax rate" electrode and the segment signal line S6,
Connection with the common signal line H3 is performed. The connection between the “tax” electrode and the segment signal line S6 and the connection between the common signal line H4 are performed. The connection of the “extracted” electrode to the segment signal line S5 and the connection of the common signal line H4 are performed. The connection between the "setting" electrode, the segment signal line S4, and the common signal line H2 is performed. The connection between the “%” electrode, the segment signal line S4, and the common signal line H4 is performed. Further, an "M" electrode as a display electrode for memory calculation processing and a segment signal line H
4 and the connection of the common signal line H1. Connection between the "answer" or "ANS" electrode as a display electrode for the four arithmetic calculations and the segment signal line S4, and the common signal line H3
And connection.

L for currency conversion processing shown in FIGS.
In the CD indicators 12 and 22, the electrodes for displaying "yen" or local currency are connected to the segment signal line S6, and the common signal line H1 is connected. The connection between the electrode of "foreign currency" or the euro currency symbol and the segment signal line S5 and the connection with the common signal line H4 are performed. The connection between the "rate" or "RATE" electrode and the segment signal line S6 and the connection to the common signal line H3 are performed. The connection between the electrode representing conversion into yen or the conversion into local currency and the segment signal line H3 and the connection to the common signal line H1 are performed. The connection to the segment signal line H4 and the connection to the common signal line H1 for conversion into foreign currency or conversion into euro currency are performed. Connection between the "setting" or "SET" electrode and the segment signal line H4, and the common signal line H
3 is connected. The display electrodes for memory calculation processing
The connection between the “M” electrode and the segment signal line S4 and the connection to the common signal line H2 are performed. The display electrodes for the four arithmetic calculations connect the "answer" or "ANS" electrode to the segment signal line S4, and connect to the common signal line H4.

In each of the LCD displays 2, 12, and 22 connected as described above, the segment signal lines and the common signal lines connected to the respective segment electrodes are selectively turned on.
By setting N, the specified electrode can be brought into a display state, display by efficient control is realized, and the LCD displays 2, 12, 22 can be manufactured efficiently.

As a display device of an information processing device for executing any one of the tax calculation process, the currency conversion process, and the four arithmetic calculation processes, four segment signal lines S3, S4, S5, S6 and Arranging six common signal lines, and each signal line S3, S4, S5, S
6, forming a display electrode having any one of a symbol shape related to tax calculation, a symbol shape related to currency conversion, and a symbol shape related to four arithmetic calculations on a substrate on which H1 to H6 are provided. It can be manufactured by a manufacturing method. Accordingly, the substrate, the segment signal lines S3, S4, S5, S6 and the common signal lines H1 to H6 are connected to the respective LCD displays 2, 12, 22.
The LCD displays 2, 12, and 22 can be manufactured efficiently by commonly forming them.

FIG. 18 shows an operation procedure according to a program stored in the ROM 32 of the microcomputer 30 shown in FIG. The microcomputer 30 automatically switches the display according to the input key. For this reason,
Keyboards 3, 13, 23 for microcomputer 30
Is connected, any one of the keyboards 3, 13, 23 is connected according to a key matrix as shown in FIG. 21 can be performed.

At step a1 after the start of the operation, it is determined whether or not the input is a key input operation for setting or checking the tax rate. When it is determined that the input operation is a key input operation for tax rate setting or tax rate confirmation, the mode shifts to a mode for displaying a tax rate in step a2. If it is determined in step a1 that the operation is not a key operation for setting the tax rate or confirming the tax rate, step a
At 3, it is determined whether or not the operation is a key input operation for calculating the tax rate.
When it is determined that this is a key input operation for tax rate calculation,
In step a4, the mode is shifted to a mode for displaying the tax-included amount, the tax-excluded amount, and the tax amount. If it is determined in step a3 that the input is not a key input operation for calculating the tax rate, the process proceeds to step a5, and it is determined whether the input is a key input operation for rate setting or rate confirmation. When it is determined that the input operation is a key input operation for rate setting or rate confirmation, a currency conversion rate is displayed in step a6. If it is determined in step a5 that the input operation is not an input operation for rate setting or rate confirmation, it is determined in step a5 whether the input operation is a key input operation for currency conversion calculation. If it is determined that the operation is a key input operation for currency conversion calculation, the amount of currency to be converted and the amount of currency after currency conversion are displayed in step a8.

If it is determined in step a7 that the input operation is not a currency conversion calculation operation, it is determined in step a9 whether or not a value is stored in the memory. When it is determined that the value is stored in the memory, the value stored in the memory is changed to the first row display area 2 in the upper row in step a10.
a, 12a, 22a, and 42a. Step a9
If it is determined that no value is stored in the memory at step a11, the final answer is displayed in the upper first row display areas 2a, 12a, 22a and 42a at step a11. Step a2, Step a4, Step a6, Step a8,
When the procedure of step a10 and step a11 is completed, the process returns to step a1.

FIG. 19 shows steps a1 to a2 in FIG.
The procedure of the processing of setting the tax rate and confirming the tax rate shown in FIG. After the procedure starts, in step b1, it is confirmed that the "CA" key has been input. Next, in step b2, it is confirmed that the "tax included / tax excluded" key shown in FIG. 1 has been input.
If it is confirmed that the input operation has been performed, the mode is set to the tax rate setting mode in step b3, and it is determined in step b4 whether the numerical key has been input. If the numeric key is operated, the numerical value input in step b5 is stored as the tax rate. Next, in step b6, it waits for the input of the "=" key. If the "=" key is input, the tax rate is set in step b7, and the "setting" is set so that the user can see that the tax rate has been set.
Symbol is displayed.

If it is determined in step b2 that the "tax-included / excl. Tax" key has not been operated, step b
Then, it is determined whether or not the “tax rate confirmation” key has been operated. If it is determined that the input operation has been performed, the tax rate is confirmed in step b9, and the set tax rate is displayed. If the tax rate has not been set, the tax rate 0% is displayed. When it is determined in step b4 that the numeric key has not been input, the process proceeds to step b10.
It is determined whether or not the “=” key has been operated.
When it is determined that the “=” key has been input, the tax rate that has already been set is reset, as shown in step b12. If it is determined in step b10 that the "=" key has not been input, step b
It moves to 11 and cancels the tax rate setting mode. Step b1
When it is determined that the "CA" key has not been operated for input, or when the "tax rate confirmation" key has not been operated for input in step b8, the procedure of the tax rate setting and the tax rate confirmation is ended.

FIG. 20 shows the procedure of tax calculation in steps a3 to a4 shown in FIG. After the start of the procedure, step c
In step 1, it is determined whether the "CA" key has been input.
If it is determined that the "CA" key has not been input, the process proceeds to step c2, where it is determined whether a numeric key has been input. If it is determined that a numeric key has not been input, the process proceeds to step c3, where it is determined whether another key has been input. If no other key has been input, the process returns to step c1.

If it is determined in step c1 that the "CA" key has been input, the process proceeds to step c4, where it is determined whether a numeric key has been input. If the numeric key has not been entered, it is determined in step c5 whether the "tax included / tax excluded" key has been entered. When it is determined that the input has been made, the tax rate setting mode is set in step c6. If it is determined in step c5 that the "tax included / excluding tax" key has not been entered, step c7
It is determined whether or not another key has been input.
If no other key is input, step c
Return to 1.

If it is determined in step c2 or step c4 that a numeric key has been input, step c
In step 8, it is determined whether the "tax included / excl. Tax" key has been input. If it is determined that an input has been made, in step c9, the entered numerical value is calculated including tax, and the tax-included amount and the tax-excluded amount are displayed. Tax-included symbols are displayed on the upper side, and tax-excluded symbols are displayed on the lower side. Next, in step c10, it is determined whether or not the "tax included / tax excluded" key has been input again. If it is determined that the input has been made, step c
At 11, the tax amount is calculated, and the tax-included amount and the tax amount are displayed. The tax symbol is displayed in the upper row and the tax symbol is displayed in the lower row.

If it is determined in step c8 that the "tax included / excl. Tax" key has not been entered, the process proceeds to step c12.
To determine if an operator has been entered. Before it is determined in step c8 that the “tax included / excl. When it is determined, an operator is input following the numeric key. If no operator is input, the process returns to step c8. If it is determined that an operator is input, then in step c13, "tax included
It is determined whether the "excl. Tax" key has been entered. If it is determined that the input has been made, in step c14, the value of the result of the four arithmetic calculations is calculated including tax, and the tax-included amount and the tax-excluded amount are displayed. Tax-included symbols are displayed on the upper side and tax-excluded symbols are displayed on the lower side. Next, in step c15, "tax included / tax excluded"
Determine whether the key has been pressed again. When it is determined that the input has been made, the process proceeds to step c11, where the calculation of the tax amount, the tax-included amount and the display of the tax amount are performed.

If it is determined in step c3 or step c7 that another key has been input, step c
Move to 16. In step c16, it is determined whether or not the "tax included / tax excluded" key has been input. If it is determined that the "tax included / excl. Tax" key has been entered, step c
Move to 17. In step c17, since the X register used for tax calculation is 0, 0 is displayed for both the tax-included amount and the tax-excluded amount. When it is determined in step c10, step c15, or step c16 that the "tax-included / tax-excluded" key has not been input, or when the process of step c11 has been completed, the tax calculation procedure ends.

FIG. 21 shows steps a5 to a6 in FIG.
The processing procedure for setting the currency conversion rate and confirming the rate shown in FIG. After the procedure starts, in a step d1, it is determined whether or not the "CA" key is input. If it is determined that a key has been input, it is determined in step d2 whether a key indicating conversion from foreign currency to yen or from yen to foreign currency has been input. When it is determined that the input has been made, the mode is set to the rate setting mode in step d3. Then step d
At 4, it is determined whether a numeric key has been entered. If it is determined that the number has been input, the input number is stored as a currency conversion rate in step d5. Next, in step d6, the process waits for the "=" key to be input, and when it is input, in step d7, the rate is set, and a "set" symbol is displayed so that the user can see that the rate has been set.

If it is determined in step d2 that a key indicating conversion from foreign currency to yen or yen to foreign currency has not been input, it is determined in step d8 whether a rate confirmation key has been input. If it is determined that an input has been made, a rate confirmation operation is performed in step d9. In the rate check operation, if the rate has already been set, the set rate is displayed. If no rate is set, rate 0 is displayed.

After entering the rate setting mode in step c3, when it is determined in step c4 that no numeric key has been input, it is determined in step d10 whether the "=" key has been input. If it is determined that the "=" key has not been input, the rate setting mode is canceled in step d11. If it is determined in step d10 that the "=" key has been input, the rate which has already been set is reset in step d12. Step d
When it is determined in step 8 that the rate confirmation key has not been input, or in steps d7, d9, and d1
When the procedures 1 and d12 are completed, the procedure for setting the currency conversion rate and confirming the rate is also completed.

FIG. 22 shows the procedure of currency conversion calculation in steps a7 to a8 shown in FIG. After the procedure starts, in a step e1, it is determined whether or not the "CA" key is input. If it is determined that no input has been made, it is determined in step e2 whether a numeric key has been input. If it is determined that no numeric key has been input, it is determined in step e3 whether another key has been input. If it is determined that no other key has been input, the process returns to step e1.

If it is determined in step e1 that the "CA" key has been input, then in step e4, "M +"
Determine whether a key has been entered. When it is determined that the input has been made, in step e5, the setting of the foreign currency or the foreign currency is switched, and a symbol indicating the conversion from the foreign currency to the circle or the symbol of the yen is displayed on the display surface of the LCD display 12. Indicates whether the symbol indicates conversion to foreign currency.
If it is determined in step e4 that the "M +" key has been input, it is determined in step e6 whether a numeric key has been input next. If a numeric key has not been entered, it is determined in step e7 whether the key is a key for instructing conversion from foreign currency to a yen or from yen to a foreign currency. When it is determined that the key is a key for instructing conversion, the mode is set to the rate setting mode in step e8. If it is determined in step e7 that a key indicating conversion from foreign currency to yen or from yen to foreign currency has not been input, the process proceeds to step e9, where it is determined whether another key has been input. If no other key has been input, the process returns to step e1.

If it is determined in step e2 or step e6 that a numeric key has been input, step e10
Then, it is determined whether or not a key indicating conversion from foreign currency to yen or from yen to foreign currency is input. When it is determined that the input has been made, the input numerical value is subjected to currency conversion, and the price of the foreign currency and the price of the yen are displayed at step e11.
On the display surface, whether the conversion is to a yen or a foreign currency is indicated by a symbol.

If it is determined in step e10 that the key is not a key for conversion from foreign currency to yen or from yen to foreign currency, in step e14 the value of the result of the four arithmetic calculations is converted into a currency.
Displays the price of foreign currency and the price of yen. On the display surface, conversion to a yen or conversion to a foreign currency is displayed using a symbol.

If it is determined in step e3 or step e9 that another key has been input, the process proceeds to step e15. In step e15, it is determined whether or not a key indicating conversion from foreign currency to yen or from yen to foreign currency has been input. When it is determined that the input has been made, the value of the yen and the foreign currency are both displayed as 0 because the X register is 0. When it is determined in step e13 or step e15 that there is no key input indicating conversion from foreign currency to yen or from yen to foreign currency, the procedure ends.

FIG. 23 shows the electronic desk calculator 21 shown in FIG.
The procedure for displaying the currency conversion rates shown in steps a5 to a6 in FIG. Steps f1 to f12 correspond to step d shown in FIG.
It is basically equivalent to each step from 1 to d12. However, instead of determining whether or not a key indicating conversion from foreign currency to yen or from yen to foreign currency is input in step d2 in FIG. 21, step f2 in FIG. 23 indicates conversion to local currency or conversion to euro. Determine whether a key has been entered. Step d7 in FIG.
Then, instead of displaying “setting”, step f in FIG.
At 7, "SET" is displayed. Further, in step d8 of FIG. 21, it is determined whether or not a rate confirmation key has been input. However, in step f8 of FIG.
The difference is that the presence or absence of the input of the "RECALL" key is confirmed.

FIG. 24 shows the electronic desk calculator 21 shown in FIG.
The procedure of the currency conversion calculation shown in steps a7 to a8 in FIG. 18 is shown. Step g1 to step g1 in FIG.
Steps 6 to 6 are steps e in the procedure shown in FIG.
It is basically equivalent to each step from 1 to step e16. However, in FIG. 22, the conversion is between foreign currency and yen, whereas in FIG. 24, the conversion is between euro and local currency. As FIG. 21 corresponds to FIG. 23, FIG. 24 also corresponds to FIG.

FIG. 25 shows a procedure for the last answer calculation shown in step all of FIG. When performing the last answer calculation, the value of the memory is cleared with the "CA" key, and the memory is stored in the first row display areas 2a, 12a, 22a, 42a on the upper side of the LCD displays 2, 12, 22, 42. Is not displayed. After the procedure starts, in a step h1, it is determined whether or not an operator has been input. When the operator is input, step h2
Wait until the numeric key is input. Next, step h3
Then, it is determined whether or not the “=” key is input. When the "=" key is input in step h3, the answer is stored in the last answer memory in step h4, and the LCD displays 2, 1 are displayed.
The storage values, which are the storage contents of the memory, are displayed on the upper side of 2, 22, and 42. Next, in step h5, it is determined whether an operator has been input. If an operator is input, it is determined in step h6 whether an "ANS" key has been input. When it is determined that the "ANS" key has been input, at step h7, the last answer is called from the last answer memory and the first answer of the LCD displays 2, 12, 22, 42 is retrieved.
It is displayed in the row display areas 2a, 12a, 22a, 42a.
Next, in a step h8, it is determined whether or not the "=" key has been input. When it is determined that the input has been made, in step h9, a calculation is performed using the final answer, the answer is stored in the last answer memory, and the LCD displays 2, 12, 22,
The stored value is displayed on the upper side of 42. When it is determined in step h1 that the operator is not after the input, the operation proceeds to step h1.
When it is determined in step 3 that the "=" key has not been entered,
When it is determined in step h5 that the operator has not been input, when it is determined in step h6 that the "ANS" key has not been input, it is determined in step h8 that the "=" key has not been input. At this time, or when the procedure of step h9 is completed, the procedure as a whole is also completed.

FIG. 26 shows an example of operating the tax rate setting and the tax rate confirmation of the tax calculation function according to the procedure shown in FIG. (A)
Shows a screen in an initial state before calculation. "CA" key,
When the “tax included / excl. Tax” key and the numerical value “5” key are sequentially input, “5.” is displayed in the second line display area 2b below the LCD display 2 as shown in FIG. A "tax rate" symbol is displayed on the left side, and a "%" symbol is displayed on the right side. If you enter the "=" key here,
As shown in (c), the numerical value of “5.%” is set as the tax rate.

Next, after inputting the numerical value "1000", the "+" key for the four arithmetic operations and the numerical value "500", the "=" key is input, and the "tax included / tax excluded" key is input. , (D), calculation and display of the tax-included amount and the tax-excluded amount are performed. The symbol of “tax included” is displayed on the upper side, and the first line display area 2a displays the amount of 1575 including tax.
Is displayed. The tax-excluded amount 1500 is displayed together with the “tax-excluded” symbol in the lower second line display area 2b. Here, when the "tax-included / excl. Tax" key is input again, the tax-included amount and the tax amount are displayed as shown in (e). The tax-included amount is the same as that of (d), and the tax-included amount of 1575 is displayed in the first row display area 2a on the upper side, and the tax amount of 75 is displayed in the second row display area 2b on the lower side. The display symbols also include a “tax included” symbol on the upper side and a “tax” symbol on the lower side.

To check the tax rate, enter a key indicating "answer" following the "CA" key, and enter "5" as shown in FIG.
You can check the tax rate set as%.

FIG. 27 shows the electronic desk calculator 11 shown in FIG.
23 shows a state in which the electronic desk calculator 21 shown in FIG. 3 sets and checks the conversion rates shown in FIG. 21 or FIG. (A) shows the screen in the initial state before the number entry. Here, when a "CA" key, a key indicating conversion from foreign currency to yen or yen to foreign currency, and a numerical value "120" are sequentially input, a rate of "120" is set as shown in (b). When the “=” key is pressed, as shown in (c),
A symbol indicating that a conversion rate of 120 yen has been set for one unit of foreign currency, for example, US $, is displayed. As the symbols, “yen”, “rate”, “foreign currency”, and “setting” are displayed. By displaying the symbol of “setting”, it is understood that the conversion rate from foreign currency to yen is set to 120 yen. Next, in order to confirm the conversion rate, when the "CA" key and the "answer" key are input in order, as shown in (d), the rate of 120 yen set from (a) to (c) is set. Is displayed.

(E), (f), and (g) of FIG.
The procedure for converting the euro currency into the local currency Deutsche Mark (DM) by the electronic desk calculator 21 of FIG. (E)
Indicates the initial state before the numerical entry. If you enter the "CA" key, a key indicating conversion to local currency or conversion to euro, and then enter the numerical value of "1.23",
As shown in (f), a conversion rate that one euro corresponds to a local currency such as 1.23 Deutsche Mark is set, and a “SET” symbol indicating that the conversion rate is set is also displayed. When the "CA" key and the "ANS" key are input, the conversion rate can be confirmed as shown in (h).

FIG. 28 shows an example of currency conversion calculation after setting the currency conversion rate according to the procedure shown in FIG. (A)
After setting the exchange rate to 1 円 = 120 yen, 15
This shows a state where $ 00 is converted into a yen. First, the "CA" key and the "M +" key are input. Step e in FIG.
1. As shown in step e4 and step e5,
By continuously inputting the “CA” key and the “M +” key, the setting can be switched from a yen to a foreign currency or from a foreign currency to a yen. Therefore, the user sets the state in which foreign currency is converted into yen by looking at the display screen of the LCD display 12. Next, "1
000 "," + "key input and" 5000 "
And the input of the “=” key are performed in order, and a key indicating conversion from foreign currency to a yen or from a yen to a foreign currency is further input. As a result, a value of 180,000, which is a value obtained by converting foreign currency $ 1500 into yen at a conversion rate of $ 1 = 120 yen, is displayed in the first line display area 12a. In the lower part, the input value of $ 1,500 is displayed as the second line display area 12b. A symbol “circle” is displayed on the upper left side of the display area of the LCD display 12, and a symbol indicating conversion into a circle is displayed on the right side. "Foreign currency" is displayed on the lower side of the display area.

By continuously inputting the "CA" key and the "M +" key, it is possible to switch between conversion from foreign currency to yen and conversion from yen to foreign currency. The conversion can be switched to a conversion mode from yen to foreign currency as shown in FIG. Here, a numeral key of “1500”, a “+” key, a numeral of “300”, and “=”
By sequentially inputting a key and a key for instructing conversion from foreign currency to yen or from yen to foreign currency, it is possible to display a state in which 1800 yen is converted into dollars as shown in FIG. At this time, the symbol of "circle" is on the upper side,
A numerical value of 1800 and a symbol indicating conversion to foreign currency are displayed. On the lower side, a symbol of “foreign currency” and a converted value of 15 are displayed.

Next, as shown in FIGS. 27 (e) to 27 (g), after setting a conversion rate such that 1 euro is equal to 1.23 German marks, the electronic desk calculator 21 shown in FIG. An example of a currency conversion calculation would be the "CA" key,
By inputting the "M +" key, whether to convert from euro to local currency or from local currency to euro is specified by looking at the display surface of the LCD display 22. In this case, it is set to convert from euro to local currency. Next, enter the numeral “300”, enter the “+” key, enter “700”, enter the “=” key, and instruct conversion to local currency or euro. Enter the key. As a result, as shown in FIG.
A display that converts 000 euros into German marks can be made. That is, a symbol of the local currency, a numerical value of 1230, and a symbol indicating conversion to the local currency are displayed on the upper side. On the lower side, a symbol of euro and a numerical value of 1000 are displayed.

To convert Deutsche Mark to Euro under the condition that 1 Euro is set at 1.23 Deutsche Mark conversion rate, input "CA" key and "M +" key to switch to Euro. Is displayed, then, for example, enter “1000”, enter the “+” key, enter “1000”, enter the “=” key, and further enter the local currency. Enter a key to indicate conversion or conversion to euro. As shown in (d), a symbol indicating the local currency, a numerical value of 2000, and a symbol indicating conversion to euro are displayed on the upper side. On the lower side, the Euro symbol and 1
2 when the euro is at the exchange rate of 1.23 Deutsche Mark
A value of 1626.0163 corresponding to 000 Deutsche Mark is displayed.

FIG. 29 shows the LCD display 42 shown in FIG.
Here is an example in which the calculation of the memory is performed using. (A) shows an initial state before input. To start without clearing the numerical value stored in the memory, start by pressing the "C.CE" key. To start clearing the contents stored in the memory, the user starts by inputting the "CA" key.
For example, when the input number of “8” and the input operation of the “M +” key are performed, as shown in FIG.
2a displays a numerical value of "8" and a symbol of "M". With the symbol of “M”, it is identified that the numerical value “8” on the upper side is the storage content of the memory. On the lower side, the second
The input number "8" is displayed as the line display area 42b. On the lower left side, the symbol of "=" is displayed,
Indicates a numeric value. Next, the results after the four arithmetic calculations are shown.
For example, when the “操作” key, the numeral of “5”, and the input operation of the “=” key are performed, as shown in (c), the numerical value on the lower side changes to 1.6. On the upper side, the value of “8” stored in the memory is displayed as it is.

Next, "RM" for calling the contents stored in the memory
Enter the key, and then enter the "÷" key.
When "4" is entered and the "=" key is operated, (d)
As shown in the figure, the value of "2", which is the quotient obtained by dividing the value of "8" stored in the memory by "4", is displayed on the lower side. Although the stored content is called from the memory by the "RM" key, the value of "8" is displayed as it is on the upper side because the stored content of the memory does not change. Next, when the input operation of the “x” key is performed, the number of “5” is input, and the input operation of the “M +” key is performed, the display changes to the display as shown in FIG. A value “10” obtained by multiplying the value of “2” displayed in (d) by “5” is displayed on the lower side, and the value of “10” is stored in the previous memory by the input operation of the “M +” key. Is stored in the memory, the storage content of the memory becomes 18, and the numerical value displayed on the upper side changes to 18.

FIG. 30 shows the electronic desk calculator 21 shown in FIG.
Is used to show an example of display when performing a last answer calculation. (A) LCD display 2 after "CA" key input
2 shows the display screen of FIG. When performing the last answer calculation, it is necessary to clear the value stored in the memory with the "CA" key so that the value of the memory is not displayed on the upper side of the two-stage display. This is for displaying the answer of the final calculation on the upper side. Next, when “1” is set, the “+” key is input, “2” is set, the “+” key is input, and “3” is set. In this way, the last input numeral "3" is displayed on the lower side. Here, when the input operation of the “=” key is performed, the answer 6 of 1 + 2 + 3 = is displayed in the lower part as shown in FIG. This answer 6
Is also the final calculated value, so it is also displayed on the upper side,
Further, a “ANS” symbol indicating that the answer is the last answer is also displayed. In addition, a symbol “=” is also displayed on the lower left side.

Further, "4" is set, the "+" key is input, "5" is set, and the "+" key is input.
When “6” is entered and the “÷” key is operated, (d)
As shown in the figure, the answer 15 of 4 + 5 + 6 = is displayed on the lower side. On the upper side, the final calculated value 6 by the “=” key operated between (b) and (c) is displayed as it is. Here, when the "ANS" key is input, as shown in (e), the final calculated value 6 using the "=" key is displayed as it is on the upper side, and "6" is also displayed on the lower side. Is displayed. The display of “6” on the lower side indicates that the numerical value placed after “÷” between (c) and (d) is “6”, and the “=” key is input. Then, as shown in (f), the final calculated value using the “=” key is 16 ÷ 6 = 2.5, and the numerical value of 2.5 is displayed on both the upper and lower rows. Is done. Next, when "2" is entered and the "x" key is operated, a numerical value of 2.5 and a symbol of "ANS" are displayed on the upper side as shown in FIG. Indicates the numerical value "2". Here, when the input operation of the “ANS” key and the input operation of the “=” key are further performed, as shown in (h), 2 × 2.5 =
Is displayed on both the upper and lower tiers. This is because the final calculated value after inputting the “=” key is 5.

FIGS. 31 and 32 show an operation in which the electronic desk calculator 1 shown in FIG. 1 is used to switch from tax calculation to memory calculation and further to last answer calculation, and the display is automatically switched accordingly. Here is an example. (A) shows a screen in an initial state before calculation. When the "CA" key is input and the "tax included / tax excluded" key is input and "5" is entered, a display as shown in (b) is performed. Lower second
The numerical value of “5” is displayed in the line display area, and the symbols of “tax rate” and “%” are displayed. Here, when the “=” key is input, 5% is set as the tax rate as shown in FIG. The "setting" symbol is also displayed.

When the input operation of the “CA” key, the input operation of the “25”, the input operation of the “×” key, the input operation of the “5” key, and the input operation of the “M +” key are performed, as shown in FIG. And 25 × 5
125, which is the answer to =, is input to the memory. In the first line display area 2a, a numerical value of "125" and a symbol of "M" indicating a numerical value of the memory are displayed. In the second line display area 2b, a numerical value of 125, which is the input result, and a symbol of "=" are displayed. Next, "CC
By inputting the "E" key, entering "10", inputting the "+" key, inputting "5", and inputting the "=" key, as shown in (e), The second line display area 2b
15 which is the answer of 10 + 5 = is displayed, and the symbol of "answer" is also displayed.

Here, when the "tax-included / tax-excluded" key is operated, the tax-included amount and the tax-excluded amount are displayed according to the tax rate set to 5%, as shown in FIG. In the first line display area 2a on the upper side, a numerical value of 15.75 including tax is displayed, and a symbol of "tax included" is also displayed. In the lower second line display area 2b, a numerical value of 15 which is a tax-excluded amount is displayed, and a symbol of "tax-excluded" is also displayed.
The “M” symbol and the “ANS” symbol are also displayed as they are, indicating that the memory and the ANS memory have numerical values. When the "tax-included / excl. Tax" key is input again, as shown in (g), although the display of the tax-included amount on the upper side remains the same, the numerical value of the tax amount of 0.75 is displayed on the lower side, and " The tax symbol is also displayed.

Next, input operation of the "C.CE" key is performed,
When “84” is input, “÷” is input, “3” is input, and the “M−” key is input, as shown in FIG. The calculated value 28 is displayed,
On the upper side, a numerical value of 97, which is a value obtained by subtracting 28 from 125, which is the storage content of the memory, is displayed. The symbol related to tax calculation on the left side is not displayed, and the symbol of "=" is displayed. As a result, it is understood that the display is a normal calculation display, and the symbol “M” is displayed on the upper side, so that it is understood that the numerical value of 97 is the storage content of the memory. Here, when the "RM" key is input, the display on the upper side does not change and the numerical value displayed on the lower side changes to 97, as shown in (i). In addition, the display of the symbol of "=" disappears at the lower side. Thus, it is understood that the value of 97 is the content stored in the memory.

As shown in FIG. 32, from the state shown in FIG. 31 (i), the user operates the “CM” key to input “1”,
By inputting the "+" key, inputting "7", and inputting the "=" key, a numerical value of 8 is displayed on both the upper and lower rows as shown in (j). The “CM” key is a key for clearing only the stored contents of the memory, and does not clear the last answer memory. However, 8 which is the calculation result of 1 + 7 = is stored in the last answer memory, and the symbol “ANS” is displayed along with the numerical value 8 on the upper side.
On the lower side, a calculation result of 8 is displayed, and a symbol of "=" indicating that the calculation is a normal calculation is also displayed.
Here, “64” is entered, and “×” key is input and operated.
When “2” is entered and “÷” is input, a numerical value of 128, which is the answer of 64 × 2 =, is displayed on the lower side as shown in (k). Next, input operation of "answer" key,
As shown in (l), the display on the lower side changes to the numerical value 8 stored in the last answer memory. Here, when the “=” key is input, the value of 16 obtained by dividing the value of 128 shown in the lower part of (k) by 8 is displayed on both the upper part and the lower part as shown in (m). Is done.

Here, the input operation of the “C · CE” key is performed.
Enter “68”, input the “+” key, and enter “17”.
Is input and the "M +" key is operated to input, as shown in (n), 85, which is the answer of 68 + 17, is displayed on the lower side, and (j) is displayed by the input operation of the "M" key. 85 is added to the storage content of the memory which was previously set to 0 by the "CM" key, and the numerical value of 85 which is the storage content of the memory is also displayed on the upper side. In addition, a symbol “M” indicating that the content is stored in the memory is displayed, and a symbol “answer” indicating that a numerical value is stored is also displayed in the last answer memory. Next, when the "tax-included / excl. Tax" key is input, as shown in (o), a numerical value of 89.25 including the tax of 5% is displayed on the upper side as the tax-included amount, and further, the value of "tax-included" is displayed. Symbols are also displayed. A numerical value of 85, which is a tax-excluded amount, is displayed on the lower side, and a symbol of "tax-excluded" is also displayed. Although the symbols “M” and “answer” are also displayed on the right side, this is a symbol indicating that a numerical value is stored in the memory and the last answer memory. In this state, when the “C · CE” key is operated, the display related to the tax calculation is terminated as shown in (p), and the memory content 85 is displayed on the upper side, and the lower side is displayed on the lower side. Is displayed as 0. On the upper side, a symbol “M” indicating that the content is stored in the memory is displayed, and further, a symbol “answer” indicating that the switch is stored in the last answer memory is displayed.

FIG. 33 and FIG. 34 show that the electronic desk calculator 11 shown in FIG.
Further, an example of an operation of switching to the last answer calculation and automatically switching the display will be described. (A) shows an initial state before calculation. By inputting the "CA" key and inputting a key indicating conversion from foreign currency to yen or from yen to foreign currency, and further entering "120", a display as shown in (b) is performed. A numerical value of “120” is displayed on the lower side, and symbols corresponding to “yen”, “rate”, and “foreign currency” are displayed. Here, input operation of “=” key,
As shown in (c), a symbol of “setting” is further displayed in the state shown in (b). Thus, one foreign currency,
For example, a conversion rate at which US $ is 120 yen is set.

Next, the user operates the "CA" key to enter "25".
, Enter the “x” key, enter “5”,
When input operation of the "M +" key is performed, as shown in (d),
The numerical value of 125, which is a 25 × 5 answer, is displayed on both the upper side and the lower side. On the upper side, a symbol of "M" indicating that the content is stored in the memory is displayed, and on the lower side, a symbol of "=" indicating that the calculation is a normal calculation is displayed. Further, input operation of “C · CE” key, input “10”, input operation of “+” key, input “5”,
When the input operation of the “=” key is performed, a numerical value of 15 which is an answer of 10 + 5 is displayed on the lower side as shown in FIG.
Since the answer is after the input of the "=" key, 15 values are stored in the last answer memory. Furthermore, if you input a key indicating conversion from foreign currency to yen or yen to foreign currency,
As shown in (f), a numerical value of 180, which is obtained by converting 15 US $, which is a foreign currency, into a yen at a conversion rate of 120 yen, is displayed in the upper row, and a symbol indicating the conversion into a yen, a memory, and a last answer memory are displayed. The symbols “M” and “answer” indicating that a numerical value is stored are displayed, and the symbols “yen” and “foreign currency” are further displayed on the left side.

Further, the input operation of the "C / CE" key, "8
Numerical value of “4”, input operation of “÷”, numerical value of “3”, “M”
When the input operation of the "-" key is performed, as shown in (g), the calculation mode returns to the normal calculation mode, and a numerical value of 28 which is an answer of 84/3 is displayed on the lower side, and "M-" is displayed on the upper side. 97, which is the result of 125-28, based on the input operation of the "" key. The symbol "M" indicates that the upper numerical value is the storage content of the memory. Here, "R
When the user operates the "M" key, a numerical value 97, which is the content stored in the memory, is also displayed on the lower side as shown in FIG.

As shown in FIG. 34, the input operation of the “CM” key, the numeral of “1”,
When the input operation of the “+” key, the numeral of “7”, and the input operation of the “=” key are performed, as shown in FIG.
8 which is the answer to 7 = is displayed. Since the stored contents of the memory are cleared by the input operation of the "CM" key, the display of the stored contents of the memory is not performed on the upper side, and the final calculation result 8 which is the stored contents of the last answer memory is displayed. Is done. A symbol of “answer” indicating that the upper display is the storage content of the last answer memory is also displayed. Next, when “64” is input, the “×” key is input operated, “2” is input, and the “÷” key is input operated,
As shown in (j), the 64 × 2 answer 1
A value of 28 is displayed. On the upper side, 8 which is the stored content of the last answer memory is displayed as it is, and a symbol of "answer" indicating that it is the stored content of the last answer memory is also displayed. When the "answer" key is input here, "8", which is the storage content of the last answer memory, is displayed on the lower side as shown in (k). Next, when the input operation of the “=” key is performed, the numerical value of 128 shown in FIG.
A value of 16, which is a value obtained by dividing by a numerical value of 8 shown in (k),
It is displayed on the lower side as shown in (l). On the upper side,
The final calculation result of the “=” key, 16, is displayed,
A "answer" symbol indicating that the content is stored in the last answer memory is also displayed.

Next, when a key indicating conversion from foreign currency to yen or from yen to foreign currency is input, as shown in (n),
A numerical value of 10200 obtained by converting 1 US $ at a conversion rate of 120 yen with respect to the value of 85 on the lower side is displayed on the upper side. Further, on the left side, symbols of "yen" and "foreign currency" are displayed, and on the right side, a symbol indicating conversion into yen, and "M" indicating that a numerical value is stored in the memory.
And an "answer" symbol indicating that data is stored in the last answer memory. Here, when the "C.CE" key is input, as shown in (o), the lower side is cleared and 0 is displayed, and the upper side displays a numerical value of 85 stored in the memory. Since 16 numbers are stored in the last answer memory, a symbol of "answer" is also displayed.

FIG. 35, FIG. 36 and FIG. 37 show the external configuration of the electronic desk calculators 51, 61 and 71 of the fifth, sixth and seventh embodiments of the present invention, respectively. Each of the electronic desk calculators 51, 61, 71 is provided with a solar cell 4 similar to the electronic desk calculators 1, 11, 21 shown in FIGS. 35, 36 and 37
The electronic desk calculators 51, 61 and 71 of FIG. 1 are different from the electronic desk calculators 1, 11 and 21 shown in FIGS.
Furthermore, it has a function of unit conversion calculation. Although the present invention can be suitably implemented in such electronic desk calculators 51, 61, and 71, the present invention is widely applied not only to electronic desk calculators but also to information processing apparatuses such as pocket computers, portable information tools, and electronic memos. be able to. The electronic desk calculators 51, 61, 71 include LCD displays 52, 62, 72 and keyboards 53, 63, 73, respectively. In the LCD displays 52, 62, 72,
Like the first row display areas 52a, 62a, 72a and the second row display areas 52b, 62b, 72b, numerical values of eight digits can be displayed in two rows. Such LCD displays 52, 62, 72 are provided by electronic desk calculators 51, 61, 7 respectively.
The display surface is exposed from the surface of No. 1 so that the user can easily read the numerical value.

Keyboards 53, 63, 73 are provided on the surfaces of the electronic desk calculators 51, 61, 71, respectively. The keyboards 53, 63, 73 are formed by adding some keys to the keyboards 3, 13, 23 shown in FIGS. The added key is a key related to unit conversion. Also, the keyboards 53, 63, 73
Then, reading and clearing of the memory are referred to as "RC
Use the "M" key to perform the same function.

FIG. 38 shows an electrical configuration common to the electronic desk calculators 51, 61 and 71 shown in FIGS. 35, 36 and 37. The microcomputer 80 has a CPU 81 inside, similarly to the microcomputer 30 shown in FIG.
A ROM 82 and a RAM 83 are included. CPU
81, ROM 82 and RAM 83 are CPs shown in FIG.
It is equivalent to U31, ROM32 and RAM33. The microcomputer 80 of the present embodiment differs from the microcomputer 30 shown in FIG. 4 in that a segment signal S7 is used. If the microcomputer 30 shown in FIG. 4 is provided with a terminal for the segment signal S7 and is not used, the microcomputer 30 shown in FIG. 4 and the microcomputer 80 shown in FIG. 38 can be shared. The power supply 34 of the microcomputer 80, the external storage device 39, the “CA” key 40, etc.
And FIG. 38 are common.

FIG. 39 shows connection terminals of the LCD displays 52, 62 and 72 shown in FIGS. 35, 36 and 37.
Compared with the connection terminals of the LCD displays 2, 12, and 22 shown in FIG. 5, terminals for segment signals S7 and S2 are added.

FIG. 40 shows a key matrix of the keyboards 53, 63 and 73. The unit conversion keys added on the keyboards 53, 63, 73 are connected to the segment signal S7. Combined with the arrow keys for unit conversion,
"%", "+/-", "x", "+", "=", "-"
Input operation of each key of, conversion of miles and km,
The conversion between ft and m, the conversion between oz and g, the conversion between lb and kg, the conversion between yd and m, and the conversion between in and cm can be respectively performed. Also, as in FIG. 6, one of a “tax-included / excl. Tax” key, a key for converting foreign currency to yen or yen to foreign currency, and a key for converting to local currency or converting to euro is one. Connect.

FIG. 41, FIG. 42 and FIG.
LCD displays 52, 62, 7 shown in FIGS. 36 and 37.
2 shows the configuration of the display surface. The configuration of each display surface shown in FIG. 41, FIG. 42 and FIG. 43 has a symbol of a unit to be converted on both sides of each display surface of the LCD displays 2, 12, and 22 shown in FIG. Is added. The conversion of the unit is performed between the imperial system and the metric system, and the upper side, that is, the first line display area 52a,
"Ft", "oz", and "l" are on the left side of 62a and 72a.
The symbol “b” is arranged, and “in”, “y”
The symbols “d” and “mile” are arranged. Lower side,
That is, "m", "g", and "kg" symbols are arranged on the left side of the second row display areas 52b, 62b, and 72b, and "cm", "m", and "km" symbols are on the right side. Be placed.

FIGS. 44 and 45 show the LCs shown in FIG.
The connection states of the electrodes constituting the display surface of the D display 52, the common signal lines, and the segment signal lines are shown. That is, in the LCD display 52, which is a display device for the tax calculation processing, the connection of the "tax included" electrode to the segment signal line S5 and the connection to the common signal line H1 are performed. The “tax rate” electrode is connected to the segment signal line S5 and the common signal line H3. The “tax” electrode is connected to the segment signal line S6 and the common signal line H4. The “extracted” electrode is connected to the common signal line S5 and the segment signal line H4. The “setting” electrode is connected to the segment signal line S4 and the common signal line H2.
The "%" electrode is connected to the segment signal line S4 and the common signal line H
Connect to 4. "M" which is a display electrode for memory calculation processing
The electrodes are connected to the segment signal line S4 and the common signal line H1. The “answer” electrode, which is a display electrode for the four arithmetic calculations, is connected to the segment signal line S4 and the common signal line H3. The “ft” electrode, which is a unit conversion calculation electrode, is connected to the segment signal line S7 and the common signal line H1.
The “oz” electrode is connected to the segment signal line S7 and the common signal line H2. The “lb” electrode is connected to the segment signal line S
7 and the common signal line H3. The “m” electrode is connected to the segment signal line S7 and the common signal line H4.
The “g” electrode is connected to the segment signal line S7 and the common signal line H
Connect to 5. The “kg” electrode is connected to the segment signal line S7.
And the common signal line H6. The “in” electrode is connected to the segment signal line S2 and the common signal line H1. "Y
The "d" electrode is connected to the segment signal line S2 and the common signal line H2.
Connect with The “mile” electrode is connected to the segment signal line S
2 and the common signal line H3. The “cm” electrode is connected to the segment signal line S2 and the common signal line H4.
The “m” electrode is connected to the segment signal line S2 and the common signal line H
Connect to 5. The “km” electrode is connected to the segment signal line S2
And the common signal line H6.

FIGS. 46 and 47 show the LC shown in FIG.
The electrode arrangement on the display surface of the D display 62 and the connection state of the common signal line and the segment signal line are shown. FIGS. 48 and 49 show connection states of electrodes and signal lines on the display surface of the LCD display 72 shown in FIG. 43, respectively. The connection state between the electrodes and the signal lines of the LCD display 62 shown in FIGS. 46 and 47 represents a symbol for unit conversion in the connection state of the electrodes and the signal lines of the LCD display 12 shown in FIGS. 14 and 15. The electrode has a configuration in which a connection state similar to that of the LCD display 52 shown in FIGS. 44 and 45 is added. The connection state between the electrodes of the LCD display 72 and the signal lines shown in FIGS.
The connection state between the electrode of the unit conversion symbol and the signal line on the LCD display 52 shown in FIGS. 44 and 45 is added to the connection state between the electrode of the LCD electrode 22 and the signal line shown in FIG. Therefore, the LCD displays 62, 72
May be performed in the same manner as the above-described method of manufacturing the LCD displays 12 and 22 except that the connection method related to the display electrodes for the unit conversion calculation process is added in the method of manufacturing the LCD display 52. .

FIG. 50 shows a general control procedure of the electronic desk calculators 51, 61, 71 by the microcomputer 80 shown in FIG. After the start of the procedure, step i
Steps 1 to i8 are respectively equivalent to steps a1 to a8 shown in FIG. However, when it is determined in step i7 that the calculation is not currency conversion calculation, the process proceeds to step i9, and it is determined whether or not the calculation is unit conversion. If it is determined that the conversion is a unit conversion, at step i10, the value of the designated unit and the value after the unit conversion are displayed on the LCD displays 52 and 6.
2 and 72. If it is determined in step i9 that the calculation is not unit conversion calculation, in each of steps i11 to i13, step a shown in FIG.
Processing equivalent to each step from step 9 to step all is performed. When the processing of step i2, step i4, step i6, step i8, step i10, step i12, and step i13 ends, the process returns to step i1.

The procedure for setting the tax rate and confirming the tax rate in step i2 is performed in the same manner as in FIG. The procedure of the tax calculation in step i4 is performed in the same manner as in FIG. The procedure for setting the rate and confirming the rate in step i6 is performed in the same manner as in FIG. 21 or FIG. The procedure of currency conversion in step i8 is performed in the same manner as in FIG. 22 or FIG. Further, the last answer memory using the key of “answer (ANS)” and the calculation related to the memory as shown in FIG. 25 can be similarly performed based on the procedure from step i11 to step i13.

FIG. 51 shows steps i9 to i1 in FIG.
The procedure of displaying the value of the designated unit and the value after the unit conversion on the LCD displays 52, 62, and 72 in the unit conversion calculation shown in FIG. At step j1, it is determined whether the "CA" key has been input. If it is determined that the "CA" key has been input, it is determined in step j2 whether a numeric key has been input. If no numeric key has been entered, the process returns to step j1. If it is determined in step j2 that a numeric key has been input, it is determined in step j3 whether a rightward arrow key indicating conversion from imperial to metric has been input. As shown in FIG. 40, the unit conversion between "ft" and "m" is designated by a "+/-" key, and the unit conversion between "oz" and "g" is designated by a "x" key. . The unit conversion between “lb” and “kg” is designated by the “+” key. "In" and "cm"
Specify the unit conversion with “−” key. The unit conversion between “yd” and “m” is designated by the “=” key. "Mil
The unit conversion between "e" and "km" is designated by the "%" key.

In step j4, "%" is input and it is determined whether or not "ft" is converted to "m". If it is determined that the conversion is from “ft” to “m”, the input numerical value is converted from ft to m in step j5.
Convert to units. If it is determined in step j4 that the conversion is not from ft to m, then in step j6, “×”
It is determined whether or not a key is operated to convert from oz to g. When it is determined that the conversion is from oz to g, at step j7, the input numerical value is converted from oz to g. When it is determined in step j6 that the conversion is not oz to g, in step j8,
It is determined whether or not the “+” key is operated to convert the unit from lb to kg. When it is determined that the conversion is from lb to kg, the numerical value input in step j9 is converted from lb to kg. If it is determined in step j8 that the conversion is not unit conversion from lb to kg, the input operation of the "-" key is performed in step j10 and i
It is determined whether the unit conversion is from n to cm. in
When it is determined that the conversion is from unit to cm, the numerical value input in step j11 is converted from in to cm. If it is determined in step j10 that the unit is not converted from in to cm, the "=" key is operated in step j12 to determine whether or not the unit is converted from yd to m. When it is determined that the conversion is from yd to m, the numerical value input in step j13 is converted to yd
From m to m. At step j12, yd to m
Step j
In step 14, the "%" key is operated to determine whether or not the unit is converted from miles to km. km from miles
If it is determined that the unit conversion is
The numerical value input in step 15 is converted from miles to km. If it is determined in step j14 that the unit is not converted from miles to km, the process returns to step j14.

If it is determined in step j13 that the input is not a rightward arrow, the flow proceeds to step j16i to determine whether or not the leftward arrow key for unit conversion from metric to imperial is operated. If it is determined that the left arrow key has been operated, the "+/-" key is operated in step j17, and m to ft
It is determined whether unit conversion to is specified. When it is determined that the unit conversion from m to ft is specified, the numerical value input in step j18 is converted from m to ft. If it is determined in step j17 that unit conversion from m to ft has not been specified, it is determined in step j19 whether the "x" key has been input and the unit conversion from g to oz has been specified. to decide. When it is determined that the unit conversion from g to oz is specified, the numerical value input in step j20 is converted from g to oz. If it is determined in step j19 that the unit conversion from g to oz is not specified, step j
At 21, it is determined whether or not the "+" key has been operated to designate unit conversion from kg to lb. kg to l
When it is determined that the unit conversion to b has been designated, the numerical value input in step j22 is converted from kg to lb. If it is determined in step j21 that the unit conversion from kg to lb is not specified, in step j23, the "-" key is operated to input cm to in.
It is determined whether unit conversion to is specified. cm
When it is determined that the unit conversion from "in" to "in" is designated, in step j24, the input numerical value is converted from "cm" to "in". In step j23, in from cm
If it is determined that the unit conversion to is not specified, at step j25, the “=” key is operated to input m
It is determined whether or not the unit conversion from to yd is specified. When it is determined that the unit conversion from m to yd is specified, in step j26, the input numerical value is
To yd. In step j25, from m to y
When it is determined that the unit conversion to d has not been specified, the "%" key is operated at step j27 to input k.
It is determined whether or not unit conversion from m to miles is designated. If it is determined that unit conversion from km to miles is designated, at step j28, the input numerical value is converted from km to miles. If it is determined in step j27 that unit conversion from km to miles is not specified, the process returns to step j17.
If it is determined in step j1 that the "CA" key has not been operated, or if it is determined in step j16 that the left arrow key has not been operated, furthermore, step j5, step j7, step j9, step j11, step j13, step j15, step j
18, step j20, step j22, step j2
4. When each step of step j26 or step j28 ends, the unit conversion procedure also ends.

Step j5, step j7, step j9, step j11, step j13, step j15, step j18, step j20, step j
The coefficients used for conversion in each of steps 22, 22, j24, j26 and j28 are determined in advance by RO
It is stored as data in M82.

FIG. 52 shows an example of unit conversion calculation performed according to the procedure of FIG. In the ROM 82, 2.54 is set as a conversion coefficient from in to cm, 0.3048 is set as a conversion coefficient from ft to m, 0.9144 is set as a conversion coefficient from yd to m, and 1.609344 is set as a conversion coefficient from km to km, 28.3495 is set as a conversion coefficient from oz to g, and 0.4535 as a conversion coefficient from lb to kg.
9237 is set. The set rate is "R
After the "ECALL" key is input, the key can be displayed by inputting a key for designating each unit conversion. For example, by inputting a "RECALL" key and inputting a "-" key for designating conversion between in and cm, a rate of 2.54 can be displayed. Further, if a “RECALL” key and a “+/−” key indicating the conversion from ft to m are input, 0.3
048 can be displayed.

In FIG. 52, what is 125yd
The following shows the procedure for converting whether or not it corresponds. First, as (a), an input operation of a “CA” key is performed. Next, as (b),
The numerical value of “125” is set, and the right arrow key is input. As a result, as shown in (c), the number 125 entered in the lower part is displayed on the display screens of the LCD displays 52, 62 and 72. Next, as shown in (d),
When an input operation of a “=” key indicating unit conversion between yd and m is performed, as shown in FIG.
A numerical value of “125” and a symbol of “yd” are displayed on the upper side of 2. On the lower side, the converted “114.
A numerical value of “3” and a symbol of “m” are displayed. This shows that 125yd is equivalent to 114.3m.

In FIG. 52, what is 200 cm is what inch
The following shows a procedure for calculating whether or not it corresponds to. In (a), "C
The "A" key is input, and in (b), the input operation of the numerical value of "200" and the input operation of the left arrow key are performed. As a result, as shown in FIG.
In the lower part of the display screen of 2,72, the entered "200"
Is displayed. Next, as shown in (d), when the "-" key for designating the conversion between in and cm is input, as shown in (e), "78.740157" corresponding to 200 cm is displayed in the upper row. And the symbol of “in” are displayed, and the numerical value of “200” and the symbol of “cm” are displayed in the lower part. This shows that 200 cm is equivalent to 78.740157 inches.

FIGS. 53 and 54 show the CPs shown in FIG.
FIG. 35 shows an example of an operation performed by U81 as the electronic desk calculator 51 shown in FIG. 35, in which the display is automatically switched as the tax calculation is changed from unit calculation to memory calculation and last answer calculation. FIG. 53A shows the display screen of the LCD display 52 in an initial state before the calculation. By inputting the “CA” key, inputting the “tax included / excl. Tax” key, and further inputting “5”, as shown in FIG. A numerical value and a symbol of “%” are displayed, and a symbol of “tax rate” is displayed on the upper side. Entering the "=" key here will set a tax rate of 5%,
The "Setting" symbol is additionally displayed.

When the input operation of the "CA" key, the input operation of the "25", the input operation of the "x" key, the input operation of the "5" key, and the input operation of the "M +" key are performed, as shown in FIG. On the upper side of the display screen of the LCD display 52, the numerical value "125" stored in the memory is displayed, and the symbol "M" is also displayed. On the lower side, a numerical value of “125” is displayed as a calculation result, and a symbol of “=” indicating normal calculation is also displayed. Here, when the right arrow key is operated and the "+/-" key for designating unit conversion from ft to m is operated, "1" is displayed on the upper side as shown in FIG.
The numerical value of “25” and the symbol of “ft” are displayed, and the numerical value of “38.1” and the symbol of “m” are displayed on the lower side. This shows that 125 ft is equivalent to 38.1 m. In addition, an “M” symbol is also displayed on the upper side, indicating that a numerical value is stored in the memory.

Input operation of the "C / CE" key and "10"
, Enter the “+” key, enter “5”,
When the input operation of the “=” key is performed, a numerical value of “125” and a symbol of “M” are displayed on the upper side, and a numerical value of “15” which is the calculation result is displayed on the lower side, as shown in FIG. As an answer of the calculation designated by “=”, a “answer” symbol indicating that the numerical value is stored in the last answer memory and a “=” symbol indicating normal calculation are displayed. . Here, when the "tax included / excl. Tax" key is input, as shown in (g), a numerical value of "15.75" and a symbol of "tax included" are displayed on the upper side. On the lower side, a numerical value of “15” and a symbol of “excl. Tax” are displayed.
Further, since numerical values are stored in the memory and the last answer memory, symbols of “M” and “answer” are also displayed. When the "tax-included / excl. Tax" key is input again, the lower part of the display screen of the LCD display 52 displays a numerical value of "0.75" and a symbol of "tax" as shown in (h). Change to show tax amount.

Input operation of "C / CE" key, input operation of "84", input operation of "@" key, input operation of "3", "M-"
When a key input operation is performed, as shown in FIG.
On the lower side of the display 52, a numerical value of “28” which is a calculation result of 84/3 is displayed, and on the upper side, “9” as a value obtained by subtracting 28 from 125 stored in the memory is displayed.
"7" is displayed. On the upper side, an "M" symbol indicating that the content is stored in the memory is further displayed, and on the lower side, an "answer" symbol indicating that the numerical value is stored in the last answer memory is displayed. . In addition, a symbol of “=” indicating a normal calculation value is also displayed on the lower side. Here, input the left arrow key indicating the conversion from metric system to imperial system,
When the user operates the "%" key to designate that the conversion is from km to miles, the numerical value of "28" is changed at the lower side of the LCD display 52 as shown in (j). Although not, a symbol of “km” is added. On the upper side, the numerical value of "17.398393"
The display of the "mile" symbol is added. This shows that 28 km is equivalent to 17.398393 miles.

When the “R · CM” key is input,
As shown in (k), on the lower side of the display screen of the LCD display 52, the numerical value of "97" which is the storage content of the memory is called and displayed. On the upper side, a numerical value of “97” and a symbol of “M” indicating the stored content of the memory are displayed. Further, since the last answer memory stores a numerical value, a symbol of "answer" is also displayed. Here, input the "R / CM" key again,
When "1" is input, the "+" key is input, and "7" is input, and the "=" key is input, the display changes as shown in (l). When the "R.CM" key is operated for the first time, the contents stored in the memory are read, and when the key is operated for the second time, the memory is cleared. Therefore, in the state shown in (l),
Since no numerical value is stored in the memory, the numerical value of "8", which is the stored content of the last answer memory, is displayed on the upper side. In this case, the numerical value of “8” is the calculation result of 1 + 7, and is the answer of the final calculation result by the input operation of the “=” key. A numerical value of “8” is also displayed on the lower side.
In this state, when “64” is set, the “×” key is input, “2” is set, and the “÷” key is input.
As shown in (m), the numerical value on the lower side changes to “128” which is the calculation result of 64 × 2. Here, when the "answer" key is operated to input "8", which is the stored content of the last answer memory, the display changes as shown in (n). Further, when the “=” key is input, “128” shown in FIG.
Is divided by the value of “8” read from the last answer memory, and the value of “16” is displayed on both the upper and lower sides of the LCD display 52 as shown in FIG. You. The numerical value of “16” is a calculation result in the normal calculation mode. In addition to the display of the symbol of “=”, the symbol of “answer” indicating that it is also stored in the last answer memory is also displayed.

Next, a key input operation of "C.CE", "6.
Numeral of "8", input operation of "+" key, numeral of "17",
When the input operation of the “M +” key is performed, the numerical value of “85” which is the calculation result of 68 + 17 is added to the memory as shown in (p), and “8” is displayed on the upper side of the LCD display 52.
The symbol “M” is displayed together with the numerical value “5”. A numerical value of “85” and a symbol of “=” indicating that it is a normal calculation process are also displayed on the lower side. Further, since the last answer memory also stores the numerical value of "16" as shown by (o), the symbol of "answer" is also displayed. If you enter the "tax included / tax excluded" key here,
As shown in (q), the upper side includes “89.2 including tax”.
A numerical value of “5” and a symbol of “tax included” are displayed. On the lower side, a numerical value of “85” excluding tax and a symbol of “excl. Tax” are displayed. A symbol “M” and a symbol “answer” indicating that a numerical value is stored in the memory and the last answer memory are also displayed. Here, "CC
When the "E" key is operated, as shown in FIG.
On the display screen of the D display 52, the numerical value in the upper row becomes the numerical value of “85” and the symbol of “M” which are the storage contents of the memory, and the display in the lower row shows the numerical value of “0” and the last answer memory. The symbol "answer" indicating that the numerical value is stored is displayed.

FIGS. 55 and 56 show the CP shown in FIG.
FIG. 36 shows an example in which U81 operates as the electronic desk calculator 61 shown in FIG. 36 so that the display is automatically switched as the currency conversion calculation is switched from the unit conversion calculation to the memory calculation and the last answer calculation. . (A)
Shows a display screen of the LCD display 62 in an initial state before calculation. Input the "CA" key, and input the key to specify the conversion from foreign currency to yen or from yen to foreign currency.
When "0" is entered, it indicates that the conversion rate between yen and foreign currency is "120", as shown in (b). Here, when the “=” key is input, a conversion rate at which one foreign currency, for example, US $ is 120 yen is set as shown in (c), and a “setting” symbol is additionally displayed. "C
When an input operation of the “A” key, an input operation of “25”, an input operation of the “×” key, an input operation of “5”, and an input operation of the “M +” key are performed, as shown in FIG. The numerical value of “125”, which is the calculation result of 5, is stored in the memory, and is displayed on the upper side and the lower side. On the upper side, a symbol “M” indicating a numerical value stored in the memory is also displayed, and on the lower side, a symbol “=” indicating normal calculation is displayed. Here, when the right arrow key and the "+/-" key indicating conversion between ft and m are input, as shown in (e), a symbol of "ft" is displayed on the upper side. In addition, a numerical value of “38.1” and a symbol of “m” are displayed on the lower side. As a result, 12
It turns out that 5 ft is equivalent to 38.1 m.

Input operation of the "C / CE" key, "10"
, Enter the “+” key, enter “5”,
When the input operation of the “=” key is performed, as shown in FIG.
A numerical value of “15”, which is a calculation result of 10 + 5, is displayed on the lower side of the CD display 62, and a symbol of “answer” indicating that the result is also stored in the last answer memory is displayed. On the upper side, a numerical value of “125” stored in the memory is displayed, and a symbol of “M” is also displayed. When a key for designating conversion from foreign currency to yen or yen to foreign currency is input, as shown in (g), the foreign currency of the numerical value of "15" displayed on the lower side in (f) is converted to yen. "1
A value of “800” is displayed on the upper side, and a symbol representing conversion into a circle and a symbol of “yen” are displayed. The symbol of "foreign currency" is added to the lower side. Further, since numerical values are stored in the memory and the last answer memory, a symbol of "M" and a symbol of "answer" are also displayed.

Input operation of the "C / CE" key, and "84"
, Enter the "÷" key, enter "3",
When the input operation of “M−” is performed, as shown in FIG.
On the lower side of the D display 62, a numerical value of “28”, which is a calculation result of 84/3, is displayed, and a symbol of “=” indicating that the calculation is a normal calculation is also displayed. On the upper side, a numerical value of "97" which is a result of subtracting 28 from 125 stored in the memory is displayed, and "M" indicating that the numerical value is stored in the memory and the last answer memory and "M" and The "answer" symbol is also displayed. Here, when the left arrow key is operated and the “%” key indicating the conversion between “mile” and “km” is operated, the lower part of the display screen of the LCD display 62 is displayed as shown in FIG. The symbol of “km” is added to the side, the numerical value of “17.398393” is displayed on the upper side, and “mil” is displayed.
The symbol "e" is added. By this, 28km
Is equivalent to 17.398393 miles.

As shown in FIG. 56, when the "R.CM" key is input, as shown in FIG. 56 (j), "97" stored in the memory is displayed on the lower side of the display screen of the LCD display 62. Is called and displayed, the display on the upper side also changes to the value of "97", and the display of symbols is only "M" and "answer". Input "R ・ CM" again,
When “1” is set, the “+” key is input, “7” is set, and the “−” key is input, as shown in (k), the calculation result of “1 + 7” is “8”. Are displayed on the upper and lower sides of the display screen of the LCD display 62, respectively, and the numerical value of "8" on the upper side is the "answer" indicating that it is a numerical value stored in the last answer memory. Symbols are also displayed. Here, when “64” is input, “×” is input, “2” is input, and “÷” is input, the display screen of the LCD display 62 is displayed as shown in (l). The lower side changes to a numerical value of “128” which is a calculation result of 64 × 2. When the input operation of the "answer" key is performed, the lower part of the display screen of the LCD display 62 changes to "8" which is a numerical value stored in the last answer memory, as shown in (m). Here, when the “=” key is input, as shown in (n), the numerical values on the upper side and lower side of the display screen of the LCD display 62 are “1/8” which is the calculation result of 128/8.
6 ", and an" answer "symbol indicating that the result is stored in the last answer memory is also displayed. In addition, a symbol “=” indicating that the result is a normal calculation is also displayed.

Input operation of the "C / CE" key is performed, and "68"
Is input, the “+” key is input, the “17” is input, and the “M +” key is input. As shown in (o), the numerical value of “85” which is the calculation result of 68 + 17 is obtained as shown in (o). Is L
“M” is displayed on the upper and lower sides of the display screen of the CD display 62 to indicate that the content is stored in the memory, and a symbol “answer” is displayed to indicate that the numerical value is also stored in the last answer memory. Is displayed, and a symbol "=" indicating that the calculation is normal is displayed. Here, when a key for designating conversion from a foreign currency to a yen or from a yen to a foreign currency is input, as shown in (p), the foreign currency of “85” becomes “1”.
The display changes to indicate that it corresponds to the circle “0200”. That is, a numerical value of “10200”, a symbol of “yen”, and a symbol indicating conversion into a circle are displayed on the upper side of the display screen of the LCD display 62, and “85” is displayed on the lower side of the display screen. ”And a symbol of“ foreign currency ”are displayed. In addition, "M" and "answer" symbols indicating that numerical values are stored in the memory and the last answer memory are also displayed. In this state, when the “C · CE” key is input, as shown in (q), the LCD display 62
On the upper side of the display screen, a numerical value “85”, which is the content stored in the memory, is displayed, and a symbol “M” is also displayed.
In addition, a “answer” symbol indicating that a numerical value is stored in the last answer memory is also displayed. A numerical value of “0” is displayed on the lower side.

In the above description, although the numerical values of the memory and the numerical values of the last answer memory are displayed in the upper display area, it goes without saying that they may be displayed in the lower display area. Further, as the specific calculation processing, the present invention can be similarly applied to the calculation of the selling price and profit of a product, various interests, and the like. In addition, it is needless to say that the display area can be provided with three or more rows.

[0121]

As described above, according to the present invention, a display device having a display area for a plurality of lines provided in an information processing apparatus is effectively used to display the contents stored in a memory and the display of the final calculation result. In addition, the display of the calculation result of the calculation means according to the input operation to the input device is simultaneously displayed in a plurality of rows, so that the display device can be effectively used and the display can be easily understood.

According to the present invention, in a specific calculation mode for executing a predetermined specific calculation process, a specific type of calculation result and a numerical value corresponding to the calculation result can be simultaneously displayed in a display area of a plurality of rows. Therefore, the result of the specific operation can be displayed in a state where the correspondence is easy to understand.

Further, according to the present invention, the tax calculation result can be simultaneously displayed as a tax-included amount and a tax-excluded amount or a tax amount on a display area of a plurality of lines of the arithmetic unit, and the display unit is effectively used for the tax calculation. The display can be easily understood.

Further, according to the present invention, the result of a specific operation regarding currency conversion can be displayed simultaneously in a display area of a plurality of rows with a numerical value corresponding to the result of conversion, so that the conversion state can be displayed in an easily understandable manner.

According to the present invention, the specific calculation result of the unit conversion is displayed simultaneously with the numerical value related to the display device capable of displaying the numerical value in the display area of a plurality of rows, and the conversion correspondence is displayed in a state where it can be easily understood. can do.

Further, according to the present invention, in the normal calculation mode including the four arithmetic operations, the contents stored in the memory or the final operation result can be effectively used by effectively using the display device having a plurality of rows of display areas provided in the information processing apparatus. In the specific calculation mode, which simultaneously displays numerical values related to calculations including the four arithmetic operations in response to operation input to the input device and performs a predetermined type of specific calculation, the result of the specific calculation and the related numerical values are simultaneously supported. In this way, a display that is easy to understand can be performed.

Further, according to the present invention, a combination of a segment signal line and a common signal line is selected as a display device of an information processing apparatus, and simultaneous display of a plurality of numerical values in a plurality of rows of display areas is performed. A memory segment arranged in the vicinity of a predetermined display area is selected to display the numerical value of the memory content while identifying that the memory content is being displayed, or to display a numerical value of the memory content. It is possible to simultaneously display a plurality of numerical values related to the specific calculation while displaying the symbol in the specific calculation segment as being a numerical value.

Further, according to the present invention, a program recorded on a recording medium is read by a computer, and the display contents of a memory, final calculation results, or numerical values associated with an input operation in a normal calculation are displayed in a display area of a plurality of lines. Can be performed at the same time, or the calculation result of a predetermined type of specific calculation and the associated numerical value can be displayed at the same time.

[Brief description of the drawings]

FIG. 1 is a front view illustrating an external configuration of an electronic desk calculator 1 according to a first embodiment of the present invention.

FIG. 2 is an electronic desk calculator 11 according to a second embodiment of the present invention.
FIG. 2 is a front view showing the external configuration of FIG.

FIG. 3 is an electronic desk calculator 21 according to a third embodiment of the present invention.
FIG. 2 is a front view showing the external configuration of FIG.

FIG. 4 is a block diagram showing an electrical configuration common to the electronic desk calculators 1, 11, 21 shown in FIGS. 1, 2 and 3;

FIG. 5 shows the LCD display 2 shown in FIGS. 1, 2 and 3;
It is a figure which shows the signal connection terminal of 12,22.

FIG. 6 shows keyboards 3, 13, and 3 shown in FIGS. 1, 2 and 3;
23 is a diagram showing a key matrix common to 23. FIG.

FIG. 7 is a diagram showing a key matrix when the microcomputer 30 of FIG. 4 switches functions related to decimal point display.

8 is a diagram showing a display screen of the LCD display 2 shown in FIG.

9 is a diagram showing a display screen of the LCD display 12 shown in FIG.

FIG. 10 is a diagram showing a display screen of an LCD display 22 shown in FIG.

FIG. 11 is a diagram showing a display screen of an LCD display used in a fourth embodiment of the present invention.

12 is a diagram showing a connection state between a segment electrode for display and a common signal line on the LCD display 2 shown in FIG.

13 is a diagram showing a connection state between display electrodes of the LCD display 2 shown in FIG. 1 and segment signal lines.

14 is a diagram showing a connection state between a display electrode of the LCD display 12 shown in FIG. 2 and a common signal line.

15 is a diagram showing a connection state between display electrodes of the LCD display 12 shown in FIG. 2 and segment signal lines.

16 is a diagram showing a connection state between a display electrode of the LCD display 22 shown in FIG. 3 and a common signal line.

17 is a diagram showing a connection state between a display electrode of the LCD display 22 shown in FIG. 3 and a segment signal line.

18 is a flowchart showing an overall control procedure of the electronic desk calculators 1, 11, 21 shown in FIGS. 1, 2 and 3 by the CPU 31 shown in FIG.

19 is a flowchart showing a processing procedure of a tax rate setting or a tax rate confirmation as the electronic desk calculator 1 by the CPU 31 of FIG.

20 is a flowchart showing a processing procedure of a tax rate calculation as the electronic desk calculator 1 by the CPU 31 of FIG.

21 is an electronic desk calculator 11 by the CPU 31 of FIG.
It is a flowchart which shows the processing procedure of the rate setting or rate confirmation as "."

22. An electronic desk calculator 11 by the CPU 31 of FIG.
It is a flowchart showing the procedure of currency conversion calculation.

23 is an electronic desk calculator 21 by the CPU 31 of FIG.
9 is a flowchart showing a procedure for setting a currency conversion rate as an example.

24 is an electronic desk calculator 21 by the CPU 31 of FIG.
It is a flowchart showing the procedure of currency conversion calculation.

FIG. 25 is a flowchart showing a procedure of last answer calculation by the CPU 31 of FIG. 4;

FIG. 26 is a diagram illustrating an example of an operation of performing tax rate setting and tax rate confirmation according to the procedure of FIG. 19;

FIG. 27 is a diagram showing an example of an operation of setting and confirming a currency conversion rate according to the procedure of FIG. 21 or FIG.

28 is a diagram illustrating an example of an operation of performing currency conversion calculation after setting a currency conversion rate according to the procedure of FIG. 27.

FIG. 29 is a diagram showing an example of an operation of performing a memory calculation using the LCD display 42 of FIG. 11;

30 is a diagram illustrating an example of an operation of performing a last answer calculation using the electronic desk calculator 21 of FIG. 3;

31 is a diagram illustrating an example of an operation of performing a tax calculation, a memory calculation, and a last answer calculation using the electronic desk calculator 1 of FIG. 1;

FIG. 32 is a diagram illustrating an example of an operation of performing a tax calculation, a memory calculation, and a last answer calculation using the electronic desk calculator 1 of FIG. 1;

FIG. 33 is a diagram showing an example of an operation for performing a memory conversion calculation, a memory calculation, and a last answer calculation using the electronic desk calculator 11 of FIG. 2;

FIG. 34 is a diagram showing an example of an operation of performing a memory calculation, a memory calculation, and a last answer calculation using the electronic desk calculator 11 of FIG. 2;

FIG. 35 is an electronic desk calculator 5 according to a fifth embodiment of the present invention.
FIG. 1 is a front view showing an external configuration of FIG.

FIG. 36 is an electronic desk calculator 6 according to the sixth embodiment of the present invention.
FIG. 1 is a front view showing an external configuration of FIG.

FIG. 37 is an electronic desk calculator 7 according to the seventh embodiment of the present invention.
FIG. 1 is a front view showing an external configuration of FIG.

FIG. 38 is a block diagram showing an electrical configuration common to the electronic desk calculators 51, 61, and 71 shown in FIGS. 35, 36, and 37.

FIG. 39 is a diagram showing signal connection terminals of the LCD displays 52, 62 and 72 shown in FIGS. 35, 36 and 37.

FIG. 40 is a diagram showing a key matrix common to the keyboards 53, 63, and 73 shown in FIGS. 35, 36, and 37.

FIG. 41 is a diagram showing a display screen of the LCD display 52 shown in FIG. 35.

42 is a diagram showing a display screen of an LCD display 62 shown in FIG. 36.

43 is a diagram showing a display screen of an LCD display 72 shown in FIG. 37.

44 is a diagram showing a connection state between a segment electrode for display and a common signal line on the LCD display 52 shown in FIG. 35.

45 is a diagram showing a connection state between a segment electrode for display and a segment signal line on the LCD display 52 shown in FIG. 35.

46 is a diagram showing a connection state between a segment electrode for display and a common signal line on the LCD display 62 shown in FIG. 36.

47 is a diagram showing a connection state between a segment electrode for display and a segment signal line on the LCD display 62 shown in FIG. 36.

48 is a diagram showing a connection state between a segment electrode for display and a common signal line on the LCD display 72 shown in FIG. 37.

49 is a diagram showing a connection state between a segment electrode for display and a segment signal line on the LCD display 72 shown in FIG. 37.

50 and FIG. 3 by the CPU 81 shown in FIG. 38;
6 and the electronic desk calculators 51, 61, 71 shown in FIG.
It is a flowchart which shows the general control procedure as "."

FIG. 51 is a flowchart showing a unit conversion procedure by the CPU 81 of FIG. 38;

52 is a diagram illustrating an example of an operation of performing unit conversion according to the procedure of FIG. 51.

FIG. 53 is a diagram showing an example of an operation of performing a unit conversion calculation from a tax calculation and a last answer calculation from a memory calculation using the electronic desk calculator 51 of FIG. 35;

54 is a diagram illustrating an example of an operation of performing a unit conversion calculation from a tax calculation and a last answer calculation from a memory calculation using the electronic desk calculator 51 of FIG. 35.

FIG. 55 is a diagram showing an example of an operation of performing unit conversion calculation from currency conversion calculation, and further performing last answer calculation from memory calculation, using the electronic desk calculator 61 of FIG. 36.

FIG. 56 is a diagram showing an example of an operation of performing unit conversion calculation from currency conversion calculation, and further performing last answer calculation from memory calculation, using the electronic desk calculator 61 of FIG. 36.

[Explanation of symbols]

1, 11, 21, 51, 61, 71 Electronic desk calculator 2, 12, 22, 42, 52, 62, 72 LCD display 2a, 12a, 22a, 42a, 52a, 62a, 72
a First line display area 2b, 12b, 22b, 42b, 52b, 62b, 72
b Second line display area 3, 13, 23, 53, 63, 73 Keyboard 30, 80 Microcomputer 31, 81 CPU 32, 82 ROM 33, 83 RAM 39 External storage device

Claims (8)

[Claims] An input device for receiving a user's input operation, a memory for storing a numerical value based on a predetermined input operation to the input device, and a display device having a display area for displaying a numerical value for a plurality of lines. An information processing apparatus comprising: an arithmetic unit for executing arithmetic processing including four arithmetic operations in accordance with an input operation to an input device; and a display control unit for displaying an arithmetic processing result of the arithmetic unit on a display device; When the numerical value is stored, the numerical value is displayed in a predetermined display area of the display device so as to be identifiable as the stored content of the memory. When the numerical value is not stored in the memory, the final calculation processing result of the calculating means is displayed. Is displayed in the predetermined display area, and a numerical value corresponding to the input operation to the input device and the arithmetic processing of the arithmetic means is displayed in the display area of the display device other than the predetermined display area. The information processing apparatus characterized by comprising a display control means for controlling so. 2. The computer according to claim 1, wherein the arithmetic unit includes a normal calculation mode for executing arithmetic processing including the four arithmetic operations in accordance with a predetermined input operation to the input device, and a specific calculation mode for executing a predetermined type of specific arithmetic processing. The display control means, when the calculation means is switched to the specific calculation mode, the numerical value stored in the memory,
And, instead of displaying the numerical value corresponding to the input operation to the input device and the arithmetic processing of the arithmetic means, a numerical value of the result of the specific arithmetic processing and a predetermined numerical value related to the result are applied to the specific arithmetic processing. 2. The information processing apparatus according to claim 1, wherein the information is controlled so that the related information can be identified. 3. The calculation means performs a tax calculation as the predetermined type of specific calculation processing, and the display control means displays a tax amount and a tax-excluded amount or a tax amount based on the tax calculation by the calculation means. 3. The information processing apparatus according to claim 2, wherein the information is controlled so as to be displayed on the apparatus. 4. The calculation means performs currency conversion as the predetermined kind of specific calculation processing, and the display control means calculates an amount represented by a plurality of kinds of currencies based on the currency conversion by the calculation means. 4. The information processing apparatus according to claim 2, wherein the information is controlled so as to be displayed on the display device. 5. The calculation means performs unit conversion as the predetermined type of specific calculation processing, and the display control means converts a numerical value represented by a plurality of types of units based on the unit conversion by the calculation means. The information processing apparatus according to claim 2, wherein control is performed to display the information on the display device. 6. An input device for receiving a user's input operation, a memory for storing a numerical value based on a predetermined input operation to the input device, and a display device having a display area for displaying a numerical value for a plurality of lines. In a display method of an information processing apparatus provided, it is possible to switch an arithmetic processing mode between a normal calculation mode including four arithmetic operations and a specific calculation mode for performing a predetermined type of operation in accordance with an input operation to an input device. In the specific calculation mode, a plurality of types of numerical values related to the specific type of calculation are displayed in a display area for a plurality of rows of the display device so as to be identifiable. When a numerical value is stored in the memory, the stored content is stored in a predetermined display area, and when no numerical value is stored in the memory, the last calculation processing result is displayed in a different display area from the predetermined display area. That in the display area, the display method of an information processing apparatus characterized by in response to the input operation of the input device a numerical value relating to operations involving arithmetic operations, identifiably displayed. 7. An information processing apparatus comprising: an input device that accepts a user's input operation; and a memory that stores a numerical value based on a predetermined input operation to the input device. In the display device of the device, a plurality of numerical segments arranged to form a display region capable of displaying numerical values for a plurality of rows, and a display region formed by the numerical segments,
A memory segment for displaying a symbol for identifying the storage contents of the memory, which is arranged so as to be in the vicinity of a predetermined display area, and for identifying a numerical value related to a predetermined kind of operation A plurality of segment signal lines selectively connected according to a predetermined combination of a specific calculation segment, a numerical segment, a memory segment, and a specific calculation segment; A plurality of commons selectively connected according to a predetermined combination of a numerical segment, a memory segment and a specific calculation segment so that a numerical value can be displayed and a symbol can be displayed in the memory segment and the specific calculation segment. Signal line, the segment signal line and the common signal line A display device for an information processing apparatus, wherein one of a memory segment and a specific calculation segment can be selected and displayed by switching a predetermined selection. 8. A computer-readable recording medium in which a program for causing a computer to function is recorded as the information processing apparatus according to claim 1.