JPH01287724A - Input/output device - Google Patents

Abstract

PURPOSE:To correct erroneous input permitting a correct key to be inputted following an operation to input a specific symbol key accidentally by deleting specific symbol data processed previously and stored in a storage means from the storage means. CONSTITUTION:When a key on an input means is operated, data corresponding to the key is stored in the storage means, and a character or a symbol, etc., is displayed on an output medium by an output means. Also, when the specific symbol key is depressed, it is decided whether or not combination with the key to be depressed next is correct by a decision means. And a control means outputs the combination as it is when the combination is correct, and deletes the specific symbol data operated previously and stored in the storage means from the storage means when it is not correct. In such a way, it is possible to eliminate a complicated correction operation when the specific symbol key is depressed accidentally.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an input/output device that outputs special characters on an output medium based on a character key operated subsequent to the operation of a special symbol key. It is related to.

[Prior Art] Conventionally, in an output device capable of outputting special characters on an output medium, such as an electronic typewriter, "°°" is displayed above or below the printing position based on the operation of a special symbol key.
After printing a special symbol such as " (umlaut), the print head is returned to the above printing position (backspace), and based on the subsequently operated character key, for example, the alphabet "A" is printed at the same printing position. , a special character "λ" consisting of a combination of the above special symbols and letters.

It was designed to print on printing paper.

[Problem to be Solved by the Invention] However, if a special symbol key on the keyboard is operated by mistake, for example, when the character "B" is supposed to be entered, a special symbol such as the special symbol "゛" (umlaut) may be input. If you accidentally press a key, or if you manually enter another special symbol "" (accentage) when you should have entered the special character "A", use the correction key to correct that key manually. It is necessary to delete the key and then operate the correct key again, which is very troublesome. ◎ The purpose of the present invention is to solve the above-mentioned drawbacks of the conventional technology, so that even if a special symbol key is operated incorrectly, the correction key cannot be used. without any operation,
To provide an input/output device that can correct incorrect input by subsequently inputting the correct key.

[Means for Solving the Problem] In order to achieve this object, the input/output device of the present invention includes an input means having a large number of keys such as character keys and special symbol keys, and a character key corresponding to the operated key. , an output means for outputting symbols, etc. on the output medium, and the output means outputs special characters on the output medium based on the character key after operation of the special symbol key. a storage means for storing data corresponding to a key; a determination means for determining whether or not a combination of operated special symbol data and data corresponding to a subsequently operated key is correct; control means for outputting the combination as it is if the combination is correct, and for deleting previously manipulated special symbol data stored in the storage means from the storage means when the combination is incorrect. It is characterized by

[Operation] When a key on the input means is operated, data corresponding to the key is stored in the storage means, and characters, symbols, etc. are outputted on the output medium by the output means. Furthermore, when a special symbol key is operated, the determining means determines whether or not the combination with the next operated key is correct. If the combination is correct, the control means outputs the combination as is through the output means, and if the combination is incorrect, the control means stores the previously operated special symbol data stored in the storage means. Remove from means. Therefore, even if a special symbol key is operated by mistake, there is no need to perform a troublesome correction operation.

[Example Hereinafter, the output device of the present invention will be explained according to embodiments.

FIG. 1 is a perspective view schematically showing an electronic typewriter according to the present invention, and a keyboard 1 includes a large number of character keys 2 corresponding to alphabets, a large number of numeric keys 3 corresponding to respective numbers, and a number of character keys 2 corresponding to alphabetical characters. , a spacer 4 that controls a carriage 32 (described later) along the printing line independently of the printing of numbers, etc., and a carriage 3 that controls the carriage 32 independently of the printing of letters, numbers, etc.
Backspace key 5 to control 2 backwards along the print line
, a line feed key 6 that controls the return of the carriage 32 to the left margin position, and controls the paper feed of printing paper mounted on the platen 30 (to be described later) in a direction perpendicular to the printing line, a large number of character keys 2, and numeric keys. Shift key 7 to select and control uppercase or lowercase letters corresponding to key 3, etc.
and a second shift key 8, which selects and controls special symbols such as "# (umlaut)" and "" (accent silicone flex) arranged in correspondence with the character key 2 and number key 3, and the left and right width of the print line. a left margin key 9 and a right margin key 10 that set the left margin key 9 and the right margin key 10, respectively; a margin release key 11 that releases the left and right margin positions set by the left margin key 9 and the right margin key 10, respectively, across the position printing line; A tab set key 12 for setting an arbitrary tab position within a print line set by the margin key 9 and the right margin key 10, a tab clear key 13 for canceling the tab position set by the tab set key 12, and the tab set key. Carriage 3 to the tab position set by 12
2, a paper feed key 15 that feeds the print paper at predetermined pitches in a direction perpendicular to the print line, and a paper return key 15 that similarly moves the print paper back in the direction orthogonal to the print line. key 16, and a repeat key 17 that continuously performs the respective operations based on the pressed letter key 2, number key 3, space bar 4, pack space key 5, line feed key 6, paper feed key 15, and paper return key 16. and,
It calculates and processes characters, numbers, calculation symbols, etc. input by operating the character keys 2, number keys 3, calculation keys 19 (described later), etc., as well as numerical data input manually, according to calculation formulas specified by the calculation keys 19. , a first mode in which the calculation results are displayed respectively, and the displayed characters, numbers, calculation symbols, and calculation results are edited and processed, and the characters, numbers, calculation symbols, and calculations displayed outside of the above operations are a mode changeover switch 18 that selects a second mode in which the results, etc. are printed on the printing paper; and a third mode in which the input characters and numerical symbols are displayed and printed on the printing paper at the same time;
When the first mode or the second mode is selected by the mode selector switch 18, the calculation keys 19 each select one of the four arithmetic expressions for the numerical data input by the numeric keys 3, and The equal key 20 executes arithmetic processing according to the calculated formula, and the character keys 2, numeric keys 3, arithmetic keys 19, and the characters, numbers, arithmetic symbols, and arithmetic results entered using the equal key 20 are displayed as 5×8 dots. A liquid crystal display device 21 consisting of a predetermined number of digits displayed in a matrix, a clear key 22 for erasing all characters, numbers, calculation symbols, calculation results, etc. displayed on the display device 21, and a first or second mode. When selected, the cursor keys 23 and 24 move the cursor 21a displayed on the display device 21 to a desired digit position, and blink the characters, etc. at the moved digit position to enable correction; Cursor key 23/2
The delete key 25 deletes characters, etc. at the digit position corresponding to the cursor 21a moved by the cursor keys 23 and 24. An insert key 26 for shifting to the upper digit side and adding a character or the like to the digit position corresponding to the cursor 21a, and a line pitch selection switch 27 for determining the print line spacing are arranged.

The shift lock key 7a is a key that holds the selection operation for uppercase letters, and when the key is pressed, the light emitting diode 28 emits light to indicate that uppercase letters and shift-side characters are in the selected state.

It also has a self-repeat function that continuously executes the line feed operation, paper feed operation, or paper return operation when the line feed key 6, paper feed key 15, or paper return key 16 is continuously pressed.

Further, reference numeral 29 in the figure is a brightness setting dial that adjusts the brightness by varying the voltage applied to each liquid crystal in the display device 21 and changing the arrangement state of the crystals.

The platen 30 is rotatably supported by a main body frame (not shown), and is equipped with thermal paper 31 as printing paper on which a coloring layer that can be colored by heat is fixed. The thermal paper 31 is fed and returned in a direction perpendicular to the print line according to the rotational drive of the thermosensitive paper 31 (not shown).

The carriage 32 is attached to a guide rod 33 fixed to the main body frame along the printing line and to a swingable rod (none of which is shown) connected to a link mechanism so as to be reciprocatable.

The thermal head 34 is mounted on the carriage 32 and comes into contact with the thermal paper 31 during the printing operation, selectively generates heat in a large number of heat generating layers arranged in a direction perpendicular to the print line, and prints on the thermal paper 31. Letters, numbers, etc., for example 5x8
It is printed in dot matrix format.

A power switch 35 is attached to the main body case, and when the power switch 35 is turned on, the electronic typewriter is powered by a battery housed behind the platen 30.

Fig. 2 is an electronic block diagram of an electronic typewriter, Fig. 3 is an explanatory diagram showing the buffer memory and display device, and Fig. 4 is a flowchart showing the basic operation of an electronic typewriter. Explain the operation of a typewriter.

First, when the power switch 35 is turned on, the carriage 32
The display device 21 is returned to its home position, and the display device 21
After erasing and initializing (block 40)
, a control circuit 36 consisting of a microcomputer sets flags corresponding to the first to third modes set by the mode changeover switch 18, and also sets a read-only memory (hereinafter referred to as RO) based on the set flag.
A program corresponding to each mode written in the program memory 37a in the program memory 37a (referred to as M) is designated (block 41).

The control circuit 36 then determines whether or not a key arranged on the keyboard 1 has been pressed, and if no key has been pressed manually, the control circuit 36 continues the mode search described above (block 42).
.

On the other hand, when a key is pressed manually, the control circuit 36 stores the code data inputted from the keyboard 1 corresponding to each key into a buffer memory 36a such as a random access memory having storage locations with the same number of digits as the display device 21. A ROM in which letters, numbers, etc. are written in sequence, and data such as letters and numbers are written based on the written code data.
The display control circuit 38 accesses pattern data corresponding to the pressed key from the pattern memory 37b in the display control circuit 37.
Output to.

Further, when the second mode is selected, the control circuit 36 transfers the pattern data corresponding to the pressed key from the pattern memory 37b based on the code data shifted out from the buffer memory 36a, and when the third mode is selected. When selected, each pattern data is accessed from the pattern memory 37b based on the code data written in the buffer memory 36a and outputted to the print control circuit 39.

The display control circuit 38 sequentially writes the input pattern data into a buffer memory 38a having storage positions with the same number of digits as the display device 21 while shifting the digit positions, and also writes the pattern data written into the buffer memory 38a. is operated to output the pattern data written in each memory location to the digit position of the display device 21 corresponding to the memory location, and based on the pattern data, characters, numbers, etc. are displayed in a 5×8 dot matrix format. to display on the LCD.

The print control circuit 39 advances the carriage 32 along the print line based on the pattern data input from the control circuit 36, and selectively causes the heat generating layer of the thermal head to generate heat to print characters, numbers, etc. on the print paper 31. is printed in a 5×8 dot matrix format (block 43).

Note that the control circuit 3 in the block MC indicated by the broken line in FIG.
6 and ROM 37 are constituted by a one-chip microcomputer.

Next, the operation in each mode will be explained according to FIGS. 5 to 15.

First, when the first mode is selected by the mode changeover switch 18, a flag corresponding to the first mode is set, and the program memory 37 is set based on the flag.
At step a, the first address where the program corresponding to the first mode is stored is accessed, and the first mode processing, which will be described later, is executed sequentially according to the program.

When a key is entered manually, the code data corresponding to the key is character key 2, number key 3, space key 4, and calculation key 1.
9, etc., or whether it is function data corresponding to the backspace key 5, line feed key 6, tab key 14, equal key 20, etc., and if it is other than the above function data, input. Determine whether the state is possible.

When in the input enabled state, the pattern data accessed based on the code data written in the buffer memory 36a is written in the buffer memory 38a, and the character key 2 pressed based on the input pattern data; Characters, symbols, etc. corresponding to numeric keys 3, space keys 4, and calculation keys 19 are displayed on a liquid crystal display in a 5×8 dot matrix format.

After the above display, the data counter is counted up to count the number of input data, and it is determined whether the number of input data exceeds the number of digits in the buffer memory 36a, and the number of input data exceeds the number of digits. If it is over, the code data shifted out from the buffer memory 36a is stored as print data in the register 36b, and then it is determined whether the code data stored in the register 36b is numerical data.

When the above code data is numerical data, after writing the numerical data into the first or second calculation register (not shown), the code data is inputted sequentially according to the flowchart shown in FIG. .

The key is used to display and process characters entered manually.

In the code data determination described above, the code data is the cursor key 2 that shifts the cursor 21a to the left.
3, the cursor 21a on the display device 21 is switched to the correction mode by blinking as shown in FIG.
Moves one digit to the left (toward the higher digits).

Then, the code data corresponding to the key pressed next to the cursor key 23 is written to the digit position of the buffer memory 36a designated by the cursor 21a, and the pattern accessed from the pattern memory 37b based on the code data is written. Data is written to the digit position of the buffer memory 38a.

After the above operation, it is determined whether or not the cursor 21a is located at the 0th digit of the display device 21, and if the cursor 21a is located at the 0th digit, the correction mode is canceled and the correction mode specified by the cursor 21a is canceled. The characters displayed at the digit positions are changed based on the corrected input pattern data. In addition, in determining the digit position of the cursor 21g, if the cursor is located at a position other than 0, the cursor 21g
a to the right, and the characters displayed at the digit position specified by the cursor 21a are corrected.The display is changed based on the input pattern data, and the characters displayed on the display device 21 are sequentially corrected.

Also, when the cursor key 24 is pressed, the cursor 21
After blinking a and switching to the correction mode, it is determined whether the cursor 21a on the display device 21 is located at the 0th digit, and if the cursor 21a is located at the 0th digit,
Cancel correction mode. In the above judgment, cursor 21
If a is located at a position other than 0, the cursor 21a is shifted to the lower digit, and the characters displayed on the display device 21 are changed based on the corrected code data according to the above-described operation.

Similar to the above operation, when in the correction mode, delete key 25
When is pressed, the code data and pattern data at the digit position in the buffer memories 36a, 38a specified by the cursor 21a are erased, and the code data and pattern data written in the buffer memories 36a, 38a at the upper digits from the cursor 21a position are erased. After shifting the code data and pattern data to the lower digit side, it is determined whether the cursor 21a is located at the 0 digit in the buffer memory 38a according to the operation described above, and if the cursor 21a is located at the 0 digit, the correction mode is activated. When the cursor 21a is released and is located at a digit other than 0, the cursor 21a is shifted to the lower digit side and the process moves to the start.

Similar to the above operation, when in the correction mode, insert key 26
When is pressed, the force in the buffer memories 36a and 38a shifts the code data and pattern data written to the upper digit side from the -curve 21a position by one digit, and moves the cursor 21a to the upper digit side. Shift to the buffer memory 36 specified by cursor 21 a E
After writing the code data and pattern data corresponding to the space in the digit position a. Subsequently, the code data and pattern data corresponding to the pressed key are rewritten, and characters, etc. are inserted.

If the manually entered code data is function data corresponding to the equal key 20, the numerical data written in the first calculation register and the numerical data input next and written in the second calculation register is calculated according to the calculation formula specified by the calculation key 19, and then the content of the first calculation register is rewritten to the first calculation result.

Then, the contents of the second calculation register are rewritten according to the input numerical data, and the first calculation result written to the first calculation register and the numerical data written to the second calculation register are rewritten. is calculated according to the calculation formula specified by the calculation key 19, and then the content of the first calculation register is rewritten to the second calculation result and the calculations are performed sequentially.

Then, when the equal key 20 is pressed again after the numerical data, all the code data written in the buffer memory 36a is shifted out, the same calculation as above is performed based on the code data, and then the calculation is performed. After writing the result to the third calculation register, the equal sign and the calculation result written to the third calculation register are transferred to the buffer memory 3.
8a, the equal sign and the calculation result are displayed on the display device 2.
1, then move to start.

In the above calculation process, for example, as in the calculation formula "No, 20 ABC $50000 When the numerical data "50000" is input, the control circuit 36 determines that the numerical data "20" is numerical data unrelated to the arithmetic expression, rewrites the contents of the first calculation register to the numerical data "50000", and uses the arithmetic expression. 50000
Arithmetic processing is performed based on x60.

In the first mode, when the backspace key 5, line feed key 6, or tab key 14 is pressed manually, alarm processing is executed as shown in FIGS. 8 and 9.

Next, when the second mode is selected by the mode changeover switch 18, a flag corresponding to the second mode is set, and the program memory 37 is set based on the flag.
At step a, the start address where the program corresponding to the second mode is stored is accessed, and the second mode processing, which will be described later, is executed sequentially according to the program.

When the key is input manually, the input code data and pattern data are written into the buffer memories 36a and 38a according to the flowchart shown in FIG. 5, and characters etc. corresponding to the pattern data are sequentially displayed on the display device 21. After that, it is determined whether the data counter corresponds to the write margin, and if they match, alarm processing is executed. Conversely, if the two do not match, after counting up the data counter, the pattern data accessed from the pattern memory 37b is output to the print control circuit 39 based on the code data shifted out from the buffer memory 36a according to the key input. The heat generating layer in the thermal head 34 is selectively heated to print letters, numbers, arithmetic symbols, etc. on the thermal paper 31.

In the second mode, when the mode is switched to the correction mode and the delete key 25 is pressed manually, the buffer memory 36 designated by the cursor 21a is
After erasing the code data and pattern data written in the digit positions in a and 38a, shift the code data and pattern data written to the left side of the cursor 21a in the buffer memory 36aψ38a to lower digits according to the flowchart shown in FIG. Then, along with the shift, the count value of the data counter is counted down, calculation processing of the data counter is executed, and the process moves to the start.

Furthermore, when the insert key 26 is pressed manually in the correction mode, the code data and pattern data written to the left of the cursor 21a in the buffer memories 36a and 38a, as well as the cursor 21a, are As the data is shifted to the upper digit by one digit, the count value of the data counter is counted up, the counting process of the data counter is executed, and the process moves to the start.

Incidentally, when in the correction mode, the contents of the buffer memories 36a and 38a are rewritten based on the code data and pattern data manually entered after pressing the cursor keys 23 and 24, similar to the operation in the first mode described above. .

In addition, when the equal key 20 is pressed manually after inputting an arithmetic expression in the second mode, the input numerical data is calculated according to the arithmetic expression specified by the calculation key 19, as in the first mode described above. After processing, perform arithmetic processing according to the flowchart shown in FIG. 7, and
The data counter number and the data number written in the buffer memory 36a are added, the data counter calculation process is executed, and the process moves to the start.

When the backspace key 5 is pressed in the second mode, it is determined whether the carriage 32 has moved to the left margin position based on the count value of the data counter as shown in FIG. Carriage 3
2 is located, the carriage 32 is moved backward by one digit along the print line, and then the data counter is taunted down and the calculation process of the data counter is executed.
Move to start.

In the second mode, the new line key 6 or the tab key 14
When the key is pressed, it is determined whether the pressed key is the line feed key 6 or the tab key 14, as shown in FIG. If the line feed key 6 is pressed in this determination, all code data and pattern data written in the buffer memories 36a and 38a are shifted out and displayed on the display device 2.
After erasing all the characters, etc. displayed above and outputting the pattern data corresponding to the shifted out code data to the print control circuit 39 to print the characters, etc., the carriage 32 is moved to the position set by the left margin key 9. At the same time, the platen 30 is rotated, the thermal paper 31 is fed according to the line pitch set by the line pitch selection switch 27, the data counter is set to the left margin position, and calculation processing is executed. , move to start.

Further, when the tab key 14 is pressed, the code data and pattern data written in the buffer memories 36a and 38a are shifted in accordance with the tab position, and the characters etc. displayed on the display device 21 are changed. After outputting pattern data corresponding to the shifted out code data to the print control circuit 39 and printing characters, etc., the carriage 32 moves to the tab position set by the tab set key 12.
, set the data counter to the tab position, perform calculation processing, and move to start.

Next, when the third mode is selected by the mode changeover switch 18, a flag corresponding to the third mode is set, and the program memory 37a is set based on the flag.
The program accesses the start address where the program corresponding to the third mode is stored, and sequentially executes the third mode processing described later in accordance with the program.

When the key is pressed manually, the control circuit 36 counts up the data counter in the same way as the operation in the second mode described above according to the flowchart shown in FIG.
The pattern data accessed from the pattern memory 37b based on the code data written in the buffer memory 36a is output to the display control circuit 38 and the print control circuit 39, respectively, and characters etc. are displayed on the display device 21 based on the pattern data. is displayed, and characters and the like are printed on the thermal paper 31.

When the cursor keys 23 and 24, the delete key 25, the insert key 26, and the equal key 20 are pressed manually in the third mode, editing processing and arithmetic processing are prohibited as shown in FIGS. 6 and 7, and an alarm is generated. Execute processing.

When the backspace key 5 is pressed in the third mode, the data counter is calculated in the same way as in the second mode, and then written to the buffer memories 36a and 38a, as shown in FIG. The code data and pattern data are shifted by one digit to the lower digit side, the display device 21 is changed, and the process moves to the start.

In the third mode, line feed key 6 or tab key 14
When the key is pressed manually, the pattern data written in the buffer memories 36a and 38a is erased in the same way as the operation in the second mode shown in FIG. At the same time as the tab operation is executed, data counter calculation processing is executed and the process moves to the start.

The calculation process of the data counter described above is based on the number of code data corresponding to the write margin, as shown in FIG.
Based on the number of code data counted by the data counter, it is determined whether or not there is an overflow, and in this determination, if the number of data counters overflows from the write margin, based on the code data that overflows from the write margin. Characters, etc. are displayed blinking on the display device 21 to notify that the blinking characters, etc. are in an overflow state. Conversely, if the input code data does not overflow the write margin in the above determination, the overflow operation is canceled.

Next, various operations associated with switching the mode changeover switch 18 will be explained according to FIG. 11.

When the mode selector switch 18 is switched from the third mode to the second mode, the control circuit 36 sets a flag corresponding to the second mode, and then switches the buffer memories 36a and 38.
All the code data and pattern data written in a are erased, the characters etc. displayed on the display device 21 are changed, and the process moves to the start.

When the mode selector switch 18 is switched from the second mode to the first mode, the control circuit 36 sets a flag corresponding to the first mode, and then changes the number of code data written in the buffer memory 36a from the write margin. Determine whether there is an overflow or not, and if it is an overflow,
After accessing pattern data from the pattern memory 37b based on code data other than overflow written in the buffer memory 36a and executing a printing operation based on the pattern data, the data counter is set to the write margin and an overflow occurs. After writing the code data into the buffer memory 36a and canceling the blinking display of the characters, etc. corresponding to the overflowed code data, the display of the characters, etc. displayed on the display device 21 is changed based on the code data, and the process moves to the start. . Conversely, if the number of code data does not overflow from the write margin in the above judgment, the buffer memory 3
After printing characters etc. corresponding to the code data written in the buffer memory 36a, all the code data written in the buffer memory 36a are erased and the process moves to the start.

When the mode selector switch 18 is switched from the first mode to the second mode, the control circuit 36 sets a flag corresponding to the second mode, and then the code data written in the buffer memory 36a overflows from the write margin. If there is no overflow, the printing operation is executed based on the code data written in the buffer memory 36a, and then all the characters etc. displayed on the display device 21 are erased. Move to start.

There is an overflow in the above judgment! After blinking and displaying the characters overflowing from the light margin, it is determined whether the line feed key 6 has been pressed manually.

If the line feed key 6 is pressed manually in this judgment, after printing the characters that do not overflow from the light margin, executes the line feed operation, displays the overflowing characters on the display device 21, and then prints the characters from the buffer memory. The number of code data written in 36a and the left margin position are added together, input to the data counter, calculation processing of the data counter is executed, and the process moves to the start. Further, in the above determination, if a key other than the line feed key 6 is pressed manually, after executing the alarm process, it is determined whether or not the line feed key 6 has been pressed again, and processing is performed according to the above-described operation.

When the mode selector switch 18 is switched from the first mode to the third mode, the control circuit 36 sets a flag corresponding to the third mode, and then the code data written in the buffer memory 36a overflows from the write margin. If there is no overflow, a printing operation is executed based on the code data written in the buffer memory 36a in the same way as the operation described above, and then the characters displayed on the display device 21 are printed. etc., and move to the start. If the above determination indicates that there is an overflow, the overflowed characters, etc. are displayed blinking, and then it is determined whether the line feed key 6 has been pressed manually.

When the line feed key 6 is pressed manually, after printing characters that have not overflowed and executing the line feed operation, the overflowed code data is written to the buffer memory 36a, and the printing operation is executed based on the code data. Then, the number of code data written in the buffer memory 36a and the left margin position are added, the data is input to the data counter, calculation processing of the data counter is executed, and the process moves to the start. Also, in the above judgment, the line feed key 6
If a key other than the key is pressed manually, alarm processing is performed in the same way as in the operation described above, and then it is determined whether the line feed key 6 has been pressed again, and processing is performed according to the operation described above.

When the mode selector switch 18 is switched from the third mode to the first mode, the control circuit 36 sets a flag corresponding to the first mode, and then erases all code data written in the buffer memory 36a. , display device 2
1. Erase the characters displayed above and proceed to the start.

Furthermore, when the mode selector switch 18 is switched from the third mode to the second mode, the control circuit 36 sets a flag corresponding to the second mode, and then writes the flag to the buffer memory 36a in the same manner as described above. All the code data is erased, as well as the characters displayed on the display device 21, and the process moves to the start.

Next, the output (display and printing) of special characters in the output device of the present invention will be explained with reference to FIGS. 12 and 13.

First, in a state where the second shift key 8 is pressed in the first to third modes (step S1, hereinafter simply SL
It is expressed as The same applies to other steps), when a dead key such as a special symbol "" (umlaut) or "# (accentage) that does not involve movement of the carriage 32 is pressed (S2
, YES), the control circuit 36 determines whether or not the dead key mode is set, as shown in FIGS. 12 and 13 (S3).

If not set to dead key mode (N in S3)
o) Write the code data corresponding to the pressed dead key into the buffer memory 36a (S4), set the dead key mode that does not involve movement of the carriage 32 (S5), and then write the code data into the buffer memory 36a. A special symbol "°" is displayed on the display device 21 based on the pattern data corresponding to the code data entered (S6), and the process moves to start (S1).

Subsequently, for example, if a dead key corresponding to the special symbol "" is pressed (YES in S3), the code data corresponding to the special symbol "°" previously written in the buffer memory 36a is transferred to the dead key pressed afterward. (S7), and the special symbol “゛” displayed on the display device 21 is changed to the special symbol “″” based on the pattern data corresponding to the code data (38), and the start ( Shift to SL).

On the other hand, if a key other than a dead key, such as the letter "A", is pressed after the special symbol "°゛" (
YES in S9), cancel the dead key mode mentioned above (S9).
10), refer to a special character data table in which code data corresponding to predetermined special characters are arranged,
The special symbol “°” entered earlier and the character entered later “
It is determined whether the combination with A'' is possible (Sll).

If the combination is possible in the above judgment (Y in S11)
ES), accesses the code data corresponding to the special character "A" from the special character data table, writes the code data to the buffer memory 36a (S12), and writes the pattern data corresponding to the code data to the display control circuit. 38 or print control circuit 39 to display or print characters, etc. corresponding to the pattern data (31
B).

The process then returns to the start (Sl).

On the other hand, if the special symbol "°°" is followed by a key other than the put key, such as the letter "B" (
YES in S9), the special character "B" consisting of the combination of the special symbol "°" and the character "B" is displayed on the special character data table.
Because the code data corresponding to is not arranged (S1
1 (NO), after determining that the combination of the special symbol "" and the character "B" is impossible, the buffer memory 36a1.Z
The code data corresponding to the written special symbol “°°” is rewritten to the code data corresponding to the character “B” (S14
), and the special symbol "°" displayed on the display device 21 was changed to the letter "B" or printed based on the pattern data corresponding to the code data (S15
), return to the start (Sl).

Similarly, for example, if the special symbol "°", the special symbol "~", and the letter "N" are input in this order, similar to the above operation, the special symbol "~" input later is prioritized,
After referring to the special character data table and determining whether there is a combination of the special symbol "~" and the character "N", the special character "K" accessed from the special character data table in the same manner as the above operation is The special character "N" is printed or displayed based on the code data corresponding to the character "N".

In other words, when special symbols are entered manually using the key, the last special symbol entered manually is given priority, and the combination of the special symbol and the character entered next using the key is determined according to the special character data table. If the combination matches the special characters arranged in the special character data table, display or print the special characters, and conversely, the combination does not match the special characters arranged in the special character data table. , the special characters are ignored and the characters are displayed or printed to prevent incorrect input of special characters.

Next, the automatic power-off function when the line feed key 6, paper feed key 15, or paper return key 16, which is operated in a self-repeat manner, is pressed will be described with reference to FIGS. 14 and 15.

FIG. 14 shows STO and ST1 in each state that changes depending on the pressed/released state of the key searched by scanning. It is recognized that the key is in the open state when it is in t3s'ro, and that the key is in the pressed state when it is in the state STI.

For example, when the line feed key 6 is pressed, which involves a self-repeat operation, the pressed/released state of the line feed key 6 is determined, and if the state is STO, the carriage 33 is returned to the left margin position and the paper is fed. After operating and executing a predetermined line feed process, the state changes from STO to ST1, resets the timer counter and auto power-off counter, and returns to the start.

If the line feed key 6 is continuously pressed in the above state, the timer counter is counted up and the number of times the key is scanned is sequentially counted.

When the number of scans reaches a predetermined number M by the timer counter, after resetting the timer counter, the above-mentioned line feed processing is executed, and the auto power off counter is counted up, and the auto power off counter is counted up. It is determined whether the predetermined value N has not been reached.

In the above judgment, if the count value of the auto power-off counter has not reached the predetermined value N, the process moves to the start, and the above-mentioned changeover operation is continued every time the number of scans reaches the predetermined value M by the timer counter.

Then, when the count number of the auto power-off counter reaches a predetermined value N, the control circuit 36 controls the buffer memory 3
The power supply to the display device 21 is cut off while the code data and pattern data written in 6a and 38a are held, and the control circuit 36 is connected via the diode.
The hold terminal of is changed to LOW, and the control circuit 36 is placed in a hold state.

If, for example, the line feed key 6 is pressed in the hold state, the hold terminal is changed to HIGH, and the hold state of the control circuit 36 is released.

In addition, when a key other than a key with a self-repeat operation is pressed, the state is determined, and if the state is STO, the predetermined printing/display operation corresponding to the pressed key is executed, and then the state is Transition from STO to STI and return to the start.

That is, if a self-repeat key such as the line feed key 6 is continuously pressed and the operation corresponding to the key reaches a predetermined number of times, the automatic power-off function prohibits the operation;
It is possible to reduce the power consumption of a battery-powered device.

Therefore, in this embodiment, when manually inputting a special character with a special symbol such as "°゛° (umlaut)," the combination of the special symbol and the character is determined, and only the special characters with the correct combination are accepted. Therefore, incorrect input of special characters that cannot actually occur can be prevented.

In addition, when special symbols are manually entered in succession, priority is given to the last entered special symbol and the combination of the special symbol and character is determined, which improves the operability as well as the effects described above.

[Effects of the Invention] As described in detail above, when a key provided on the input means is operated, the input/output device of the present invention includes a storage means for storing data corresponding to the key, a character corresponding to the key, an output means for outputting symbols, etc. onto an output medium; and a determining means for determining whether a combination of special symbol data corresponding to an operated special symbol key and data corresponding to a subsequently operated key is correct. , if the combination is correct by the determining means, output the combination as is;
and control means for deleting the previously operated special symbol data stored in the storage means if the combination is incorrect, and the control means deletes the previously operated special symbol data stored in the storage means, even if the special symbol key is operated by mistake. Therefore, it is possible to provide an input/output device with extremely good operability, in which an incorrect manual input can be corrected by manually inputting the correct key without operating the correction key.

[Brief explanation of the drawing]

Fig. 1 is a perspective view schematically showing an electronic typewriter according to the present invention, Fig. 2 is an electronic block diagram of the electronic typewriter, Fig. 3 is an explanatory diagram showing a buffer memory, and Fig. 4 is an electronic typewriter. Flowchart showing the basic operation of the writer, No. 5
Figures 11 to 11 are flowcharts for explaining the functions of the electronic typewriter in each mode, Figure 12 is a flowchart for outputting special characters, and Figure 13 is an explanatory diagram showing examples of combinations of special symbols and characters. , FIG. 14 is an explanatory diagram showing the state transition, and FIG. 15 is a flowchart showing the auto power-off function. In the figure, 1 is the keyboard, 2 is the letter key, 3 is the number key,
8 is a second shift key, 21 is a liquid crystal display device, 30 is a platen, 32 is a carriage, 34 is a thermal head,
36 is a control circuit, 36a is a buffer memory, 37 is RO
M, 37a is a program memory, 37b is a pattern memory, 38 is a display control circuit, and 39 is a print control circuit.

Claims (1)

[Claims] 1. An input means having a large number of keys such as character keys and special symbol keys, and an output means for outputting characters, symbols, etc. corresponding to the operated keys on an output medium, An input/output device that outputs special characters on an output medium using the output means based on a character key that is operated subsequent to the operation of a special symbol key, and a memory that stores data corresponding to the operated key. means, special symbol data corresponding to the operated special symbol key,
a determining means for determining whether or not a combination with data corresponding to a subsequently operated key is correct; and if the determining means determines that the combination is correct, the combination is output as is, and if the combination is incorrect; An input/output device comprising: a control means for deleting previously manipulated special symbol data stored in the storage means from the storage means.