JPH0525324B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention provides arithmetic functions such as four arithmetic operations, as well as
The present invention relates to a decimal point input device for a data processing device that also has the function of storing various data such as alphanumeric characters.

Conventional technology Conventionally, machines have both the function of inputting numerical values and performing calculations, and the function of inputting numerical data such as telephone numbers and storing them after inputting a person's name using Alphabet, for example.
For example, a data processing device called an electronic memo pad is used. In such data processing apparatuses, there is a type in which numerical values are input without displaying a cursor. In this type of data processing device, the numerical data is generally displayed from the right end of the multi-digit display section of the display section. At this time, a decimal point symbol is always displayed on the right end of the display section, and by inputting the integer part and then the decimal point input key and the decimal part number, you can change the number of digits in the decimal part. Then, the decimal point symbol moves to the left one digit at a time on the display. In data processing apparatuses that perform such displays, there is a problem in that editing such as correcting input data such as numerical values and alphanumeric values is generally difficult because the cursor is not displayed.

On the other hand, there is a type of data processing apparatus that has both of the above-mentioned two functions that displays a cursor on a display section to display numerical values and the like. In this type of data processing device, a decimal point symbol is not displayed in advance on the display section, and data such as input numerical values are displayed starting from the left end of the display section. In other words, characters such as numerical values and alphanumeric characters are displayed in the display area of the digit where the cursor is displayed, and when one character is displayed, the cursor moves to the display area to the right of it, and the input of the subsequent character is performed. It becomes possible. In this type of data processing apparatus, it is possible to perform arbitrary editing operations such as corrections by moving a cursor to a desired location on the data that has been input and displayed, such as numerical values or alphanumeric values.

In such a data processing device, when inputting numerical data with a decimal point, when the decimal point input key is operated after inputting the numerical data of the integer part, a decimal point symbol "." is displayed at the cursor position, and the argument is Numerical data in the decimal part is input by the subsequent numerical input.

Problems to be Solved by the Invention In such conventional data processing devices, in order to erase the decimal point symbol "." once displayed on the display section, the cursor must be moved to the display position of the decimal point symbol ".". Then, it was necessary to operate the "delete one character" key or the like to erase the numeric data, or to erase the entire numeric data including the decimal point symbol, and then input new numeric data. Therefore, there is a problem in that operations for changing the display position of the decimal point symbol "." or deleting it are complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a decimal point input device for a data processing device that solves the above-mentioned problems and can easily display a decimal point symbol at a predetermined display position and erase it.

Means for Solving the Problems The present invention provides a decimal point input device for a data processing device that includes a key input section having a decimal point symbol input key and a display section having a display area of a plurality of digits. The present invention further comprises means for detecting an operation, and means for alternately displaying/erasing a decimal point symbol between a cursor display position and a display area immediately before the cursor display position based on the output of the detection means. This is a decimal point input device for a data processing device.

Effect According to the present invention, when inputting a decimal point symbol after inputting a numeric value when inputting a numerical value using the key input section, by operating the decimal point symbol input key, the cursor displayed in one display area is displayed. A decimal separator is displayed between this position and the display area immediately before this cursor display position. Further, when attempting to erase the decimal point symbol displayed in this manner, the decimal point symbol input key may be operated continuously. That is, by continuously operating the decimal point symbol input key, the decimal point symbol at the display position is alternately displayed/disappeared.

Embodiment FIG. 1 shows a data processing device 1 according to an embodiment of the present invention.
FIG. 3 is a block diagram showing the electrical configuration of the device. The data processing device 1 has, for example, a function of performing arithmetic processing,
It is a portable data processing device that also has the function of registering and recalling data, and is called a so-called electronic memo pad. This data processing device 1
, a key input section 2, a processing section (hereinafter referred to as CPU) 3, a display section 4 realized by a liquid crystal display device, etc., and data in memo mode input from the key input section 2 are stored. data storage section 5
and a computation storage unit 60 in which numerical data in the computation mode is stored.

The CPU 3 includes a storage unit 6, a display control unit 7 realized by a decoder that controls segment electrodes and common electrodes of the display unit 4, and a read-only memory (hereinafter referred to as ROM) in which, for example, a system program is stored. 8, and a control section 9 that controls the storage section 6, display control section 7, and ROM 8. The storage section 6 includes an input buffer 10 for temporarily storing characters and numbers inputted by the key input section 2, a display buffer 11, a working register area 12, and a flag area 13. The input buffer 10 is composed of an input buffer 10a for dot display data and an input buffer 10b for displaying Japanese characters.

By inputting the key input unit 2, the code signals of dot display data and date display data in the memo mode are temporarily stored in the input buffer 10, and by pressing the registration key 26 (see FIG. 2), the code signals of the dot display data and date display data in the memo mode are stored temporarily. The data is transferred to and stored in the storage unit 5. Conversely, it is called from the data storage section 5 and temporarily stored in the input buffer 10. The code signal of numerical data in the calculation mode is also temporarily stored in the input buffer 10 at the same time, and is also stored in the calculation storage section 60 by pressing the memory keys 31 and 32.
is transferred to and stored in the calculation storage unit 6, and vice versa.
0 and temporarily stored in the input buffer 10.

The code signal stored in the input buffer 10 is transferred to the display buffer 10 as a bit signal corresponding to each number or letter by a character generator (not shown). The bit signal stored in the input buffer 10 corresponds to one dot or segment on the display section 4. For example, when the logic state of each bit of the bit signal is "1", it indicates lighting; 0'' indicates that the light is off, and is output as a display signal to the display section 4 via the display control section 7.

Further, the working register area 12 has working registers 12a, 12b, . . . , and these registers 12a, 12b, . The flag area 13 includes a first flag 13a and a second flag 1.
3b, a third flag 13c, a fourth flag 13d, and so on.

For example, when the first flag 13a is a logic "1", it indicates a memo mode (in this embodiment, a telephone mode for registering a telephone number), and when it is a logic "0", it indicates a calculation mode. 2nd flag 13
When b is a logic "1", it indicates an alphanumeric character input mode, and when it is a logic "0", it indicates a numeric input mode. Further, when the third flag 13c is logic "1", it indicates the secret registration mode, and when it is logic "0", it indicates the normal registration mode. When the fourth flag 13d is logic "1", it indicates that the password is being displayed, and when it is logic "0", it indicates that the password is not being displayed.

The data storage section 5 includes a secret registration area 5a for storing data in the secret registration mode, a normal registration area 5b for storing data in the normal registration mode, a secret registration area 5a and a normal registration area 5.
It has a management information area 5c in which information for managing the data stored in b is stored.

FIG. 2 is a diagram showing the arrangement of keys provided in the key input section 2. As shown in FIG. The key input unit 2 includes four arithmetic operation keys 20, a numeric key 21 including a function that allows alphabetical input, a call key 22 for calling registered data, a mode switching key 23 for switching between calculation mode and memo mode, It has a secret registration mode key 24 for setting a secret registration mode, an alphabet mode key 25 for switching between an alphabet input mode and a numerical input mode in the numeric key 21, and a registration key 26.

The call key 22 is a forward call key 2.
2a, and a reverse call key 22b.
The forward call key 22a is a key for sequentially calling the registered data, for example from the newest to the oldest, and the reverse call key 22b is used, for example, to call the registered data from the oldest to the oldest. This is a key for sequentially calling things from the newest to the newest. In addition, the cursor right movement key 27 has a clear memory function to clear the contents of the calculation storage section 60 in the calculation mode, the cursor left movement key 30 has a clear function to clear the data displayed on the display section 4, and the data storage section. A clear key such as an all clear key 29 for clearing the stored contents of the input buffer 10, display buffer 11, etc. other than 5 and the calculation storage section 60 is provided.

There is also a recall memory key 28 for recalling the contents of the calculation storage section 60, a memory minus key 31 for subtracting the contents displayed on the display section 4 from the storage contents of the calculation storage section 60, and a memory minus key 31 for subtracting the contents displayed on the display section 4 from the storage contents of the calculation storage section 60; A memory plus key 32 that adds the contents displayed on the display section 4, and an equal key 3
3. Enter the decimal point using the percentage display key 34 to display the percentage on the display section 4. A decimal point symbol input key 35, a power cutoff key 36, and the like are provided.

When operating the numeric keys 21, press the alphabet key 25 to set the alpha alphabet mode, and for example, when the "7" key 21d is pressed once, the alpha alphabet character "A" is input.
If the button is pressed twice, the alphanumeric character "B" will be input, and if the button is pressed three times in succession, the alphanumeric character "C" will be input. "7" key 21
If d is pressed four times in succession, the alphanumeric character "A" is input again. In this way, alphabetic characters "A" to "C" are input cyclically.
The operation for inputting alphanumeric characters using the remaining number keys 21 is the same as the operation described above. Further, the all clear key 29 also serves as a power-on key.

FIG. 3 is a diagram showing the display surface 4a of the display section 4. As shown in FIG. The display surface 4a of the display unit 4 includes a first mode display area 40, a dot display area 41, a first date character display area 42, a second date character display area 43, and a second date character display area 43.
It has a mode display area 44. The mode display area 40 has a mode display 40a that lights up in the alpha-betting mode, a telephone mode display 40b that lights up in the telephone mode, and a secret mode display 40c that lights up in the secret mode.

The dot display area 41 has six dot display parts 41.
a, 41b, 41c, 41d, 41e, and 41f, and is composed of 5×5 dots. The first day character area 42 has six segment display areas 42a, 4
2b, 42c, 42d, 42, e42, f. The segment display section 42a is 1 consisting of "0".
It is made up of segments and is therefore configured so that only either 0 or space can be displayed. The remaining segment display parts 42b to 42f are composed of Japanese character segments,
This configuration does not include a decimal point.

The second display area 43 is composed of Japanese character display sections 43a to 43h having a decimal point display section 47. The mode display area 44 also has a memory display 44a, an error display 44b, and a minus display 44c.

FIG. 4 is a flowchart showing an outline of the operation of the data processing device 1. A display is performed in a display routine at step n1, a key is read at step n2, and it is determined whether or not there is a key input at step n3. If there is no key input, processing such as blinking of the cursor is performed in step n4, and the process returns to step n2 again. If there is a key input at step n3, a process corresponding to the key input is performed at step n5, and the process returns to step n1 to reset the display.

FIG. 5 is a flowchart explaining the operation of the data processing device 1 of this embodiment, and FIGS.
The figures are diagrams each showing an example of a display on the display section 4 of the data processing device 1. With reference to Figures 1 to 9,
The operation of this embodiment will be explained. In the data processing device 1 of this embodiment, the numeric keys (“0”, “1”,
..., "9") are respectively assigned three or two alphabets as shown in FIG. To enter numerical values or alphanumeric values using the numeric keys 21, the alphabetting mode key 25 is used as described above.

That is, when the data processing device 1 is activated by pressing the all clear key 29 which also serves as a power-on key, the data processing device 1
For example, it is activated in an operating state as a calculator capable of performing numerical calculations. In other words, the numeric key 21 is "0"
It is set to an operating state in which a numerical value such as ``9'' is input. On the other hand, when attempting to input an assigned alphabet using the number keys 21, for example, if the alphabet mode key 25 is pressed once, the number keys 21 become ready for inputting the assigned alphabet. .

After inputting a desired alphanumeric value in this manner, when the alphabetting key 25 is pressed again when attempting to input a numerical value, the numeric value key 21 becomes in a state in which a numerical value can be input. Furthermore, Alphabet key 25
When pressed, the numeric key 21 is again in a state in which alphabetical input can be made. In this way, each time the alphanumeric key 25 is pressed, the numeric key 21 is alternately switched between a state in which numerical values can be entered and a state in which alphabetical characters can be entered.

Using the numeric keys 21 and alphanumeric keys 25, the dot display area 4 of the display section 4 is
1 is displayed as shown in FIG. 6, and it is assumed that numerical data is subsequently input into the second date character area 43. "1" in step m1 in Figure 5
The key 21c is pressed and this is read by the CPU 3. At this time, at step m2
The CPU 3 determines whether the operated key is the decimal point key 35 or not. If the judgment result is affirmative, the process moves to step m9, and if negative, the process moves to step m3. Based on current assumptions, the judgment will be negative. Therefore, in step m3, the CPU 3 determines whether the area where the input character "1" is displayed is the first day character display area 42 or the second day character display area 43. If this judgment is affirmative, the process moves to step m4, and the character "1" is displayed on the segment display section 43a where the cursor is currently displayed.

The process then moves to step m5, where it is determined whether a decimal point symbol "." is displayed at the cursor display position. At this moment, the decimal point symbol is not displayed, and the process moves to step m6, where the cursor 46 is displayed on the segment display section 43b. In this way, the display mode shown in FIG. 6 is obtained. By continuing to press the "7" key 21d, the above-described process is repeated, and the display shown in FIG. 6 is obtained.

Next, in step m1 of Fig. 5, press the decimal point key 3.
Press 5. At this time, the judgment at step m2 becomes affirmative, and the process moves to step m9. In step m9, it is determined whether the location where the decimal point symbol "." is displayed is the first day character display area 42 or the second day character display area 43. If this judgment is negative, the decimal point symbol "." is about to be displayed in the dot display area 41. Therefore, in step m10, the decimal point symbol "." is displayed and the cursor is displayed in the dot display area 41. displayed in the location where it is displayed. In step m11, the cursor is moved to the right by one digit on the display section 4, and then the process returns to step m1.

At present, the user is attempting to input the decimal point symbol "." following the state shown in FIG. 6, 2.
Therefore, the determination at step m9 is affirmative, and the process moves to step m12. In step m12, it is determined whether the decimal point symbol "." is already displayed in the second day character display area 43 currently being input.
At this moment, the decimal point symbol "." is not displayed in the second day character display area 43, so this determination is negative and the process moves to step m16.

In step m16, as shown in FIG.
The decimal point is between the decimal point symbol "." 45
is displayed as shown in FIG. 6. After this, the process returns to step m1. After this, for example, "7"
When the key 21d is pressed, the character "7" is displayed at the display position of the cursor 46 in FIG. 6, similar to the process described above, and the cursor is further moved to the right by one character.

In this manner, the decimal point key 35 is operated again in step m1 with the display as shown in FIG. 7, for example. After this, the process goes through steps m2 and m9, as described above, and reaches step m12. The judgment at step m12 is affirmative this time, and the process moves to step m13. step
In m13, it is determined whether the display position of the decimal point symbol "." 45 displayed as shown in FIG. 71 is immediately before the display position of the cursor 46. At this point, this judgment is affirmative, and the process continues step by step.
Moving to m14, the contents of the register 12a that stores the display position of the decimal point symbol "." 45 displayed as shown in FIG. do. In this way, a display as shown in FIG. 72 is obtained. After this, the process returns to step m1.

In this way, the cursor 4 on the display section 4
The decimal point symbol "." 45 is displayed immediately before the display position of 6, and the decimal point symbol "." 45 displayed immediately before the display position of the cursor 46 is deleted as explained with reference to FIG. The operation can be performed cyclically only by pressing the decimal point key 35. In other words, input the decimal point symbol “.”/
Erasing can be performed extremely easily.

If the numerical values ``8'' and ``0'' are inputted after inputting up to FIG. 6 3, a display as shown in FIG. 8 1 will be obtained on the display section 4. With such a display obtained, the decimal point key 35 is pressed in step m1 in FIG. At this time, the processing is performed in steps m2, m9, and
Step m13 is reached via m12. At this moment, the display position of the decimal point symbol "." 45 on the display section 4 is two characters away from the display position of the cursor 46, and therefore the determination at step m13 is negative.

Therefore, the process moves to step m15, where the data regarding the display position of the decimal point symbol "." 45 as shown in FIG. to erase. In step m16, the display position of the cursor 46 shown in FIG.
The decimal point position is set between the display position of , and a decimal point symbol "." 45 is newly displayed as shown in FIG. After this, the process returns to step m1.

In this way, the decimal point symbol "." 4 that has already been input regarding the numerical data you are trying to input.
If you want to change the display position of 5 to the display position currently being input, press the decimal point key 35 at that display position.
, and the operation of moving the cursor 46 to erase the decimal point symbol "." 45 can be omitted. Therefore, the operation is simplified, and only a single decimal point position is required to be stored in the register 12a, so that the storage capacity of the data processing device 1 including the register 12 can be reduced.

Hereinafter, it is assumed that numerical data is input to the data processing device 1 at the stage shown in FIG. 6, for example. That is, the character string "17." is displayed in the second day character display area 43, and the cursor 46 is displayed at the next digit. The operation of correcting the input character "7" to the character "8" in such a data input stage will be described.

At this moment, the cursor 46 is at the display position shown in FIG. 6. Therefore, the cursor right movement key 27
Then, using the cursor left movement key 30, move the cursor 46 to the display position of character "7".
At this time, in order to prevent the cursor 46 and the character "7" from being displayed overlappingly, the character "7" is displayed blinking instead of the cursor 46, indicating the display position where key input such as correction should be made. Do as shown. At this stage, proceed to the step shown in Figure 5.
In m1, for example, the "8" key 21a is pressed. At this time, the judgment at step m2 is negative,
The determination at step m3 is affirmative, and character "8" is displayed in place of the character "7" at step m4.

In the subsequent step m5, it is determined whether the display position of the character "7" is immediately before the decimal point symbol "." 45. If this judgment is negative, for example, by correcting the character "1" in FIG. At present, instead of displaying the cursor 46, a blinking character "1" is displayed) is moved to the right by one character. In other words, the character "7" starts blinking.

At step m5, the judgment result is affirmative at this point, and at step m6, the data regarding the display position of the decimal point symbol "." 45 in the register 12a is erased, and the decimal point symbol "." 45 is also erased from the display section 4. Next, the process moves to step m7, where the cursor 46 moves by one character to the right from the display position of the character "7", and the cursor 46 moves by one character.
A cursor 46 is displayed as shown in FIG. After this, the process returns to step m1.

When the numerical data immediately before the display position of the decimal point symbol "." 45 is changed in this way, the decimal point symbol "." 46 is deleted. That is, even when numerical data following the corrected numerical data is input as an integer part, this can be easily done. In other words, the operability of the data processing device 1 is significantly improved.

Effects According to the present invention as described above, when inputting a numerical value using the key input section, by successively operating the decimal point symbol input key after inputting the numerical value,
A decimal point symbol is alternately displayed and erased at a display position between the display position of a cursor being displayed in one display area and the display area immediately before the display position of the cursor. Therefore, it is extremely easy to input a decimal point symbol or delete a displayed decimal point symbol when inputting a numerical value, and the operability of the data processing device is greatly improved.

[Brief explanation of the drawing]

Figure 1 shows data processing operation 1 of an embodiment of the present invention.
2 is a plan view showing the key arrangement of the key input section 2 of the data processing device 1. FIG. 3 is a diagram showing the display mode of the display section 4.
5 is a flowchart showing the basic operation of the data processing device 1, FIG. 5 is a flowchart showing the operation of the data processing device 1, and FIGS. 6 to 9 are diagrams showing display examples of the display unit 4. . 1...Data processing device, 2...Key input section, 3
... CPU, 4 ... Display section, 12 ... Register area, 12a ... Decimal point display position register, 21 ...
...Number key, 25...Alphabet mode key, 17...Cursor right movement key, 30...Cursor left movement key, 43...2nd day character display area,
43a to 43h...Segment display section, 45...
Decimal point symbol ".", 46...Cursor.

Claims (1)

[Claims] 1. A key input unit having a decimal point symbol input key;
In a decimal point input device for a data processing device, the decimal point input device is equipped with a display section having a display area of multiple digits, and includes means for detecting continuous operation of a decimal point symbol input key; 1. A decimal point input device for a data processing device, comprising: means for alternately displaying/erasing a decimal point symbol between a display area immediately preceding a display position.