JPH0155112B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention provides a first mode in which data input from a keyboard is sequentially displayed on a display device, and a mode in which data displayed in the first mode is shifted out from the display device. The second part prints the data in the order of
Regarding an electronic typewriter that can switch between this mode and a third mode in which data entered from the keyboard is displayed and printed at the same time, in particular, when switching between the three modes mentioned above, data that has already been entered from the keyboard is displayed. This relates to the processing of data.

[Purpose of the invention]

For typewriters that have a first mode in which only the display device operates as described above, in the first mode, data is input sequentially from the keyboard, and only the final predetermined part of the data is printed. There are cases. For example, in an electronic typewriter equipped with a calculation function, it is unnecessary to print out the calculation formula, and it may be desired to print only the calculation result. In such a case, first, the first mode is set, an arithmetic expression is input, and only the arithmetic result is displayed on the display device by operating the equal key or the like. Next, the mode is switched to the second mode or the third mode, and only the result of the calculation is printed on the printing paper, but if the number of data of the calculation result exceeds the number of data in the current print head of the current print line of the electronic typewriter. It is possible that there are more characters than can be printed between the position and the light margin. If you want to print the calculation results on the same line, you must count and compare the number of characters that can be printed and the number of data that you want to print.

SUMMARY OF THE INVENTION An object of the present invention is to prevent the above-mentioned drawbacks, and to provide an electronic typewriter that is easy to use.

[Structure of the invention]

The present invention will be described below with reference to Examples.

FIG. 1 is a perspective view showing an outline of an electronic typewriter according to the present invention. In the figure, a keyboard 1 has a large number of character keys 2 corresponding to alphanumeric characters, and a number of character keys 2 arranged horizontally in the upper row of the keyboard 1. A large number of numeric keys 3 corresponding to numbers, a space bar 4 that controls the advancement of a carriage 32 (to be described later) along a printing line independently of the printing of letters, numbers, etc. a backspace key 5 for controlling the carriage 32 backward along the print line;
A line feed key 6, which controls the return of the printer to the left margin position, and controls paper feeding of the print paper mounted on the platen 30, which will be described later, in a direction perpendicular to the print line, a large number of character keys 2, number keys 3, etc. Shift key 7 for selecting and controlling the corresponding uppercase or lowercase letter, character key 2, and number key 3
A second shift key 8 for selecting and controlling special symbols such as "¨" (umralt) and "^" (accent silicone flex) arranged corresponding to
, a left margin key 9 and a right margin key 10 for setting the left and right widths of the print line, respectively, and the left margin key 9 and the right margin key 1.
Margin release key 1 to release the left and right margin positions set respectively by 0 for one print line
1, and a tab set key 12 for setting an arbitrary tab position within the print line set by the left margin key 9 and right margin key 10.
, a tab clear key 13 for canceling the tab position set by the tab set key 12, a tab key 14 for controlling the movement of the carriage to the tab position set by the tab set key 12, and a tab key 14 for controlling the movement of the carriage to the tab position set by the tab set key 12; A paper feed key 15 that feeds the paper every time, a paper return key 16 that similarly returns the printing paper in the direction perpendicular to the print line, and the pressed letter key 2, number key 3, space bar 4, back button. Space key 5, line feed key 6, paper feed key 15, and paper return key 1
The repeat key 17 continuously controls each operation based on 6, the character keys 2, the numeric keys 3, the arithmetic keys 19 to be described later, etc. A first mode in which numerical data is arithmetic-processed according to an arithmetic formula specified by the arithmetic keys 19, the arithmetic results are displayed, and the displayed characters, numbers, arithmetic symbols, and arithmetic results are edited. , a second mode in which characters, numbers, calculation symbols, and calculation results displayed outside of the above operations are printed on the printing paper; and a second mode in which characters, numbers, and symbols that are input 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 changeover switch 18, the four arithmetic expressions of the numerical data input using the numeric keys 3 are selected. Arithmetic keys 19 are concentrated in one place on the upper right of the keyboard 1 for selection, and the four arithmetic operation keys 19 are used to execute arithmetic processing according to the arithmetic expression selected by the arithmetic keys 19. The equal key 20, which is placed adjacent to 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, operation symbols, operation results, etc. displayed on the display device 21;
Alternatively, when the second mode is selected, a cursor key that moves the cursor 21a displayed on the display device 21 to a desired digit position and blinks the characters, etc. at the moved digit position to enable correction. 23 and 24, and the cursor keys 23 and 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 pitch selection switch 27 for determining the print line spacing are arranged.

In addition, 7a in the figure is a shift lock key that holds the selection operation of uppercase letters, and the shift lock key 7a
When pressed, the light emitting diode 28 emits light to indicate that the uppercase letter and the shift side letter are in the selected state.

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

Furthermore, 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 liquid crystals.

The platen 30 is rotatably supported by a main body frame (not shown), and is equipped with thermal paper 31 as printing paper, which is made by fastening a coloring layer that can be colored by heat, and is equipped with a step motor for paper feeding. (not shown), the thermal paper 31 is fed and returned in a direction perpendicular to the print line.

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

The thermal head 34 is mounted on the carriage 32 and comes into contact with the thermal paper 31 during the printing operation, selectively generating heat from a large number of heat generating layers arranged in a direction perpendicular to the print line, and printing on the thermal paper 31. Characters, numbers, etc. are printed in, for example, a 5×8 dot matrix format.

In the figure, reference numeral 35 denotes a power switch 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.

Figure 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 the electronic typewriter. First, when the power switch 35 is turned on, the carriage 32 is returned to the home position. At the same time, after erasing and initializing the display device 21, etc. (block 40), the control circuit 36 consisting of a microcomputer sets flags corresponding to the first to third modes set by the mode changeover switch 17, and Read-only memory (hereinafter referred to as
Program memory 37a in ROM) 37
A program corresponding to each mode written in is specified (block 41).

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

On the other hand, when a key is input, the control circuit 36 inputs the code data input from the keyboard 1 corresponding to each key to a buffer memory 36a such as a random access memory having the same number of digits as the display device 21. A ROM 37 in which pattern data such as letters and numbers are written in sequence and based on the written code data.
The pattern data corresponding to the pressed key is accessed from the pattern memory 37b inside and output to the display control circuit 38.

Further, when the second mode is selected, the control circuit 36 controls the pattern memory 36 based on the code data shifted out from the buffer memory 36a.
The print control circuit accesses the pattern data corresponding to the key pressed from 7b and the pattern data from the pattern memory 37b based on the code data written in the buffer memory 36a when the third data is selected. Output to 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.
The pattern data written in each memory location is scanned and the pattern data written in each memory location is output to the digit position of the display device 21 corresponding to the memory location, and characters, numbers, etc. are displayed based on the pattern data. It is displayed on a liquid crystal display in a 5 x 8 dot matrix format.

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

The control circuit 36 and ROM 37 in the block MC shown by the broken line in FIG. 2 are constituted by a one-chip microcomputer.

Next, the operation in each mode will be explained according to FIGS. 5 to 11.

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

When a key is input, the code data corresponding to the key is display data corresponding to character key 2, number key 3, space bar 4, calculation key 19, etc., or backspace key 5, line feed key 6,
It is determined whether the function data corresponds to the tab key 14, the equal key 20, etc., and if the function data is other than the above-mentioned function data, it is determined whether the input is possible.

When input is possible, the buffer memory 36
The pattern data accessed based on the code data written in the buffer memory 38
At the same time, the characters, symbols, etc. corresponding to the letter key 2, number key 3, space bar 4, and calculation key 19 pressed based on the input pattern data are displayed on the liquid crystal in a 5×8 dot matrix format. .

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

If the above code data is numeric data, after writing the numeric data into the first or second calculation register (not shown), move to the start and input the data sequentially according to the flowchart shown in Figure 5. Displays and processes key-input characters based on code data.

In the code data determination described above, if the code data is function data corresponding to the cursor key 23 that shifts the cursor 21a to the left, the display device 21 as shown in FIG.
Switch the cursor 21a to the correction mode by blinking the cursor 21a at the top, and move the cursor 21a one digit,
Move to the left ((upper digit side).

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 data accessed from the pattern memory 37b is written based on the code data. Write to the digit position of the buffer memory 38a.

After the above operation, the cursor 21a moves to the display device 2.
It is determined whether the cursor 2 is located at the 0th digit of
When 1a is located at the 0th digit, the correction mode is canceled and the display of the characters etc. displayed at the digit position specified by the cursor 21a is changed based on the corrected and inputted pattern data.

In determining the digit position of the cursor 21a,
When the cursor is located at a digit other than 0, the cursor 21a is shifted to the right, the characters displayed at the digit position specified by the cursor 21a are changed based on the corrected input pattern data, and the display device 21 Correct the characters displayed on the screen in sequence.

Further, when the cursor key 24 is pressed, the cursor 21a blinks, and after switching to the correction mode, the cursor 21a on the display device 21 changes to 0.
It is determined whether the cursor 21a is located at the 0th digit, and if the cursor 21a is located at the 0th digit, the correction mode is canceled.

If the cursor 21a is located at a digit other than 0 in the above judgment, the cursor 21a is shifted to the lower digit side, and the characters etc. displayed on the display device 21 are displayed based on the code data corrected and input according to the operation described above. Change.

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

Similarly to the above operation, when the insert key 26 is pressed in the correction mode, the buffer memory 36
The code data and pattern data written on the upper digit side than the cursor 21a position in a, 38a are shifted by one digit to the upper digit side, and the cursor 21a is shifted to the upper digit side.
Buffer memories 36a, 38a specified by
After writing the code data and pattern data corresponding to the space in the digit position and counting up the data counter number according to the operation described above, write the code data and pattern data corresponding to the space to the insert key 26 according to the correction mode. Subsequently, code data and pattern data corresponding to the pressed key are rewritten, and characters, etc. are inserted.

The code data entered by the key is equal to key 2
In the case of function data corresponding to 0, the first
After calculating the numerical data written in the calculation register and the numerical data input next and written in the second calculation register according to the calculation formula specified by the calculation key 19, the first calculation is performed. Rewrite the contents of the register with the first operation result.

Then, according to the further input numerical data, the second
In addition to rewriting the contents of the calculation register, the first calculation result written in the first calculation register and the numerical data written in the second calculation register are converted into the calculation formula specified by the calculation key 19. Therefore, after the calculation, the contents of the first calculation register are rewritten to the second calculation result and the calculations are performed sequentially.

When the equal key 20 is pressed after the numerical data, all the code data written in the buffer memory 36a is shifted out, and the same calculation as above is executed based on the code data.
After writing the calculation result to the third calculation register, the equal sign and the calculation result written to the third calculation register were written to the buffer memory 38a, and the equal sign and the calculation result were displayed on the display device 21. After that, send it to the start.

In the above calculation process, for example, “No.20ABC
As in the calculation formula "$50000 x 60PCS", after the above numerical data "20" is once written to the first calculation register, when the numerical data "50000" is input following character data and space data. , 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 50000×60.
Perform arithmetic processing based on .

In the first mode, when the backspace key 5, line feed key 6, or tab key 14 is input, 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 a program corresponding to the second mode is stored in the program memory 37a based on the flag. The first address is accessed, and second mode processing, which will be described later, is executed sequentially according to the program.

When the key is input, the key input code data and pattern data are transferred to the buffer memories 36a and 38 according to the flowchart shown in FIG.
a, and after sequentially displaying characters etc. corresponding to the pattern data on the display device 21, it is determined whether the data counter corresponds to the write margin, and if both match, alarm processing is executed. .

On the other hand, 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 in accordance with 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.

Switching to correction mode in the second mode,
When the delete key 25 is pressed, the first
After erasing the code data and pattern data written in the digit position in the buffer memories 36a, 38a designated by the cursor 21a, as in the mode shown in FIG. The code data and pattern data written on the left side are shifted to the lower digits, and along with this shift, the count value of the data counter is counted down to execute calculation processing of the data counter, and the process moves to the start.

Further, when the insert key 26 is inputted 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, and the cursor 21a are moved by one digit, as in the first mode described above. As the data is shifted to the upper digits, the calculated value of the data counter is counted up, the counting process of the data counter is executed, and the process moves to the start.

Note that when in the correction mode, the cursor keys 23 and 2 are pressed in the same manner as in the first mode described above.
4, the buffer memory 36
Rewrite the contents of a and 38a.

Further, in the second mode, when the equal key 20 is pressed after inputting an arithmetic expression, the key-input numerical data is processed according to the arithmetic expression specified by the arithmetic key 19, as in the first mode described above. After the arithmetic processing, the arithmetic processing is executed according to the flowchart shown in FIG. 7, and the number of data counters and the number of data written in the buffer memory 36a are added, the calculation processing of the data counter is executed, and the process proceeds to the start. Move.

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. is located, the carriage 32 is moved backward by one digit along the print line, the data counter is counted down, the data counter calculation process is executed, and the process moves to the start.

When the line feed key 6 or the tab key 14 is pressed in the second mode, 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 the above judgment, all the code data and pattern data written in the buffer memories 36a and 38a are shifted out, all characters etc. displayed on the display device 21 are erased, and the data is shifted out. After outputting pattern data corresponding to the code data to the print control circuit 39 and printing characters, etc., the carriage 32 is returned to the left merge position set by the left margin key 9, and the platen 30 is rotationally driven to print the rows. The thermal paper 31 is fed according to the line pitch set by the pitch selection switch 27, the data counter is set to the left margin, calculation processing is executed, and the process moves to the 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, the characters etc. displayed on the display device 21 are changed, and the shift After outputting the pattern data corresponding to the output code data to the print control circuit 39 and printing characters, etc., press the tab set key 1.
The carriage 32 is moved to the tab position set in step 2, the data counter is set at the tab position, calculation processing is executed, and the process moves to the start.

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

When a key is input, the control circuit 36 counts up the data counter in the same manner as the operation in the second mode described above, and then converts the code data written in the buffer memory 36a into the code data written in the buffer memory 36a. The pattern data accessed from the pattern memory 37b based on the pattern data is output to the display control circuit 38 and the print control circuit 39, respectively, and the display device 21 is output based on the pattern data.
Characters, etc. are displayed on the thermal paper 31, and characters, etc. are printed on the thermal paper 31.

In the third mode, cursor keys 23, 2
4. When the delete key 25, insert key 26, and equal key 20 are input, editing processing and arithmetic processing are prohibited as shown in FIGS. 6 and 7, and alarm processing is executed.

When the backspace key 5 is pressed in the third mode, as shown in FIG. The data and pattern data are shifted by one digit to the lower digit side, and the display device 21
Change the display and move to the start.

When the line feed key 6 or the tab key 14 is input in the third mode, the pattern data written in the buffer memories 36a and 38a is erased and displayed in the same way as the operation in the second mode shown in FIG. After changing the display of the device 21,
In addition to executing a newing action or a tab action,
Executes data counter calculation processing and moves to start.

In addition, in the calculation process of the data counter described above, as shown in FIG. 10, it is determined whether or not there is an overflow based on the number of code data corresponding to the write margin and the number of code data counted by the data counter. , in this determination, if the data counter number overflows the write margin, the display device 21
The characters etc. are displayed blinking at the top to notify that the blinking characters etc. are in an overflow state.

On the other hand, if the input code data does not overflow from the write margin in the above determination, the overflow operation is canceled.

Next, according to FIG.
The various operations associated with switching will be explained.

When the mode changeover 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 transfers the code data and pattern data written in the buffer memories 36a and 38a. At the same time as erasing everything, the display of characters etc. displayed on the display device 21 is changed, and the process moves to the start.

When the mode changeover 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 the number of code data written in the buffer memory 36a overflows from the write margin. If there is an overflow, the pattern data is accessed from the pattern memory 37b based on the code data other than the overflow written in the buffer memory 36a, and the printing operation is executed based on the pattern data. , sets the data counter to the write margin, writes the overflowed code data to the buffer memory 36a, cancels the blinking display of characters, etc. corresponding to the overflowed code data, and then displays the data on the display device 21 based on the code data. Change the displayed characters, etc. and move to the start.

On the other hand, if the number of code data does not overflow from the write margin in the above judgment,
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 is erased and the process moves to the start.

When the mode changeover 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 prevents the code data written in the buffer memory 36a from overflowing the write margin. If there is an overflow, the characters and the like overflowing from the right margin are displayed blinking, and then it is determined whether the line feed key 6 has been input.

If the line feed key 6 is pressed in this determination, after printing characters that do not overflow from the light margin, a line feed operation is executed, and after displaying the overflowing characters on the display device 21, the buffer memory 36a The number of code data written in the left margin position is added to the left margin position, the data is input to the data counter, calculation processing of the data counter is executed, and the process moves to the start.

If there is no overflow in the above judgment, after executing the printing operation based on the code data written in the buffer memory 36a, all the characters etc. displayed on the display device 21 are erased, and the process moves to the start.

Further, if a key other than the line feed key 6 is input in the above judgment, after executing the alarm process, it is judged again whether or not the line feed key 6 has been pressed, and the processing is performed according to the operation described above.

When the mode changeover 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 prevents the code data written in the buffer memory 36a from overflowing the write margin. If there is an overflow, display the overflowed characters blinking, and then press the line feed key 6.
Determine whether or not a key has been input.

When the line feed key 6 is pressed, 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. , adds the number of code data written in the buffer memory 36a and the left margin position, inputs the data to the data counter, executes the calculation process of the data counter, and moves to the start.

If there is no overflow in the above judgment, the buffer memory 36a
After executing the printing operation based on the code data written in, all the characters etc. displayed on the display device 21 are erased and the process moves to the start.

In addition, if a key other than the line feed key 6 is pressed in the above judgment, after executing the alarm process in the same way as the operation described above, it is determined whether or not the line feed key 6 has been pressed again, and according to the operation described above. Process.

When the mode changeover 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. The process moves to the start after erasing the characters displayed on the display device 21.

Further, 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 transfers the code written in the buffer memory 36a in the same manner as described above. All data is erased, as well as characters displayed on the display device 21, and the process moves to the start.

〔Effect of the invention〕

As explained above, the present invention provides a keyboard in which a large number of character keys, numeric keys, function keys including line feed keys, etc. are arranged, and outputs a code corresponding to the operated key, and a code inputted by the keyboard. A control device that outputs each data to a display device or a printing device based on the data, a display device that displays characters, numbers, etc. that correspond to keys operated based on the input data, and the input data. In the electronic typewriter, the control device sequentially displays data input from the keyboard on the display device. A first mode, a second mode in which data displayed in the first mode is printed on printing paper in the order of data shifted out from the display device, and a second mode in which data input from the keyboard is displayed and simultaneously printed. It has a third mode for printing on paper, and also has a data counter that counts up each time code data to be displayed is input and is reset by operating the line feed key, and a write margin position. When the first mode is switched from the first mode to the second mode or the third mode, the contents of the data counter are compared with the contents of the write margin storage means, and an overflow from the write margin is detected. means for blinking and displaying data on the display device, and switching from the first mode to the second mode or the third mode.
When switching to mode, the data that cannot be printed is displayed blinking in the same print line, allowing the operator to understand the data input status at a glance.This is a new electronic type with excellent operability. It provides a writer.

[Brief explanation of drawings]

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 a basic operation of the electronic typewriter. 5 to 11 are flowcharts for explaining the functions of the electronic typewriter in each mode. In the figure, 1 is the keyboard, 2 is the letter key, 3 is the number key, 19 is the calculation key, 20 is the equal key, 2
1 is a display device, 30 is a platen, 32 is a carriage, 34 is a thermal head, and 36 is a control circuit.

Claims (1)

[Claims] 1. A keyboard in which a large number of character keys, numeric keys, function keys including line feed keys, etc. are arranged and outputs a code corresponding to the operated key, and code data inputted by the keyboard. a control device that outputs each data to a display device or a printing device based on the input data; a display device that displays characters, numbers, etc. that correspond to keys operated based on the input data; and a printing device that prints characters, numbers, etc. corresponding to the keys operated by the keyboard, the control device includes a first control device that sequentially displays data input from the keyboard on the display device. a second mode in which the data displayed in the first mode is printed on the printing paper in the order of the data shifted out from the display device, and a second mode in which the data input from the keyboard is displayed on the printing paper at the same time. It has a data counter which is incremented each time code data to be displayed is input and is reset by the operation of the line feed key, and a write margin position. a write margin storage means, when switching from the first mode to the second mode or the third mode, compares the contents of the data counter with the contents of the write margin storage means;
An electronic typewriter characterized by comprising means for blinking and displaying data overflowing from a write margin on a display device.