JPH04250588A - Character recognizing and display device - Google Patents

Abstract

PURPOSE:To unnecessitate the movement of an input cursor to an erasing object character position by erasing a display character corresponding to the instruction of the display character by a pen. CONSTITUTION:When pen-down is detected, namely, when it is detected through a tablet controller 46 that a pen 6 touches a tablet 21, a CPU 41 judges whether the position of pen-down is within a board command area or not. When the pen-down position is out of the board command area, the CPU 41 judges which one of movement, copy and erase command areas the pen-down is executed in and when the pen-down is executed in one of those areas, characters in a page plate (data display area) 81 are moved, copied or erased after malfunction sub routine is executed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character recognition and display device that recognizes and displays characters written with a pen.

0002

[Prior Art] A conventional portable computer is shown in FIG.
A character recognition display device is provided which includes a type plate 100 having eight squares 102 as shown in FIG. When you write a character in the square 102 with a pen (not shown),
The character is pattern recognized and the recognized character (print)
is displayed within the square 72. To erase the character in the square where the input cursor 103 is located (in the example of FIG. 15, the character "ru" in the third square), touch this square with a pen. The characters in the grid where the input cursor 103 is not located (for example, the characters in the first grid in FIG.
In order to erase "S"), it was necessary to move the input cursor 103 to the square of the character to be erased (in the above example, the first square), and then touch this square with the pen.

0003

[Problems to be Solved by the Invention] As described above, in the conventional technology, in order to erase a recognized and displayed character, it is necessary to position the input cursor at the position of the character.
It was a pain to operate.

SUMMARY OF THE INVENTION An object of the present invention is to provide a character recognition display device that does not require positioning an input cursor at a character position to erase a displayed character.

Another object of the present invention is to provide a character recognition and display device that facilitates the selection of recognition candidate characters generated for a purpose written with a pen.

[0006]

[Means for Solving the Problems] A character recognition display device according to claim 1 is a character recognition display device that recognizes and displays characters written by a pen, and the character recognition and display device recognizes and displays characters written by a pen. The present invention is characterized by comprising a control means for erasing the designated character in response to the command.

[0007] The character recognition display device according to claim 2 is a character recognition display device that recognizes and displays characters written with a pen, and the recognized and displayed characters are displayed in response to an instruction made with the pen. The present invention is characterized by comprising a control means for erasing the designated character and displaying in a predetermined area a character candidate generated by character recognition in response to writing with a pen corresponding to the character to be erased.

[0008]

In the character recognition and display device according to the first aspect of the present invention, when a displayed character is designated with a pen, the control means erases the displayed character, thereby eliminating the need for an input cursor.

In the character recognition display device having the structure of claim 2, since the control means displays character candidates generated by character recognition in response to writing with a pen corresponding to the character to be erased, the selection of recognized character candidates is easy. It becomes easier.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view showing the structure of an embodiment in which the character recognition and display device of the present invention is applied to an electronic notebook device (portable computer). The main body 1 is provided with a power switch 2, which is turned on when the device is used and turned off when the device is discontinued. A brightness adjustment switch 3 is provided to the left of the power switch 2 to adjust the brightness of the screen 8 (brightness of the LCD 22, which will be described later). Further, a case 4 is provided on the side of the main body 1. This case 4 houses a pen 6, which has a switch 7 at its tip and is connected to the main body 1 via a cord 5, when not in use. When this pen 6 is taken out from the case 4, the main body 1 is
It can be placed in a groove 10 horizontally formed in the upper part of the housing. A speaker 9 is provided on the left side of the groove 10 to output a predetermined sound.

There are two switches 11 on the upper right side of the main body 1.
, 12 are provided. The switch 11 is a change-over switch that changes the brightness of the backlight, which will be described later, into, for example, two levels, and the switch 12 is a volume change-over switch that changes the volume of the sound output from the speaker 9 into, for example, three levels. The switch 13 provided on the left side of the main body 1 is
This is a stop switch that is operated when stopping a predetermined operation midway (for example, when stopping the sound being emitted). There is also a memory (IC) card 70 (Fig. 5) on the left side of the main body 1.
A socket 14 is arranged in which a device (see above) is attached. A socket 15 is provided on the rear side of the main body 1. A socket 16 is also provided inside a battery mounting section 1a on the rear side of the main body 1 into which a battery 19 is mounted. For example, RS232C cables, modems, and other adapters are connected to these sockets 15 and 16. Furthermore, on the upper left side of main body 1, there is an
A connection terminal 18 of the adapter 17 is provided.

FIG. 2 shows a more detailed example of the configuration of the screen 8. As shown in FIG. In this example, tablet 21 (X
A tablet 21a for detecting the position in the axial direction and a tablet 21b for detecting the position in the Y-axis direction are provided at the top. An LCD 22 is provided below the tablet 21. The LCD 22 is composed of glass plates 22a and 22b provided above and below, and a liquid crystal 23 inserted between the glass plates 22a and 22b. A fluorescent screen (EL) 26 is arranged below the LCD 22. When the fluorescent screen 26 as a backlight generates light, the light is transmitted to the LCD.
22. Since the tablets 21a and 21b are formed of transparent members, the image displayed on the liquid crystal 23 can be observed from above in the figure. Printed circuit board (PCB)
) 25 is loaded with parts (not shown) and is electrically connected to the LCD 22 via a rubber connector 24. It is also electrically connected to the tablet 21 through a conductive film 27 .

FIG. 3 shows a more detailed example of the structure of the fluorescent screen 26. In this embodiment, an insulating film 33 is placed between the electrode 31 and the light emitting section (the other electrode) 32. By applying a predetermined voltage between the electrode 31 and the light emitting section 32, the light emitting section 32 emits light. The electrode 31 and the light emitting section 32 are formed in a plate shape, and can illuminate the screen 8 uniformly.

[0014] In addition to this, it is also possible to use a fluorescent tube as the backlight. In addition, a fluorescent tube is installed on the side of the main body as a side light, and the light is transmitted to the LC using a light transmission member.
It is also possible to transmit the light to the rear of the D22 so that it can be illuminated.

FIG. 4 shows position detection using a tablet and LC
FIG. 3 is a circuit diagram showing the principle of display by D. tablet 2
1 has, for example, 512 electrodes in the X-axis direction,
It has 342 electrodes in the Y-axis direction. This results in
It becomes possible to detect 512×342 pixels. The tablet controller 46 controls the clock generation circuit 45a and sequentially applies a predetermined voltage to each of the 342 electrodes. Next, the clock generation circuit 45b is controlled, and the clock generation circuit 45b is controlled.
A voltage is sequentially applied to the 12 electrodes. That is, the tablet 21 is scanned by the clocks generated by the clock generation circuit 45a and the clock generation circuit 45b. When the pen 6 approaches a predetermined position on the tablet 21, a predetermined capacitance is formed between the tablet 21 and the pen 6. When the pen 6 is pressed against the tablet 21, the switch 7 at the tip of the pen 6 is turned on, so that the electric charge generated between the pen 6 and a predetermined electrode on the tablet 21 is detected, and the electric charge is transmitted to the tablet via the amplifier 47. The signal is supplied to the controller 46. Since the tablet controller 46 manages the clock generation timing of the clock generation circuits 45a and 45b, it is possible to detect the pressed position by the pen 6 on the tablet 21 from the detection signal supplied from the pen 6 and the clock generation timing. can. The tablet controller 46 supplies the thus detected operation coordinates of the pen 6 to the CPU 41.

On the other hand, the CPU 41 is connected to the LCD controller 4.
3 and writes data corresponding to the image to be displayed in the memory (V-RAM) 44. LCD controller 4
3 reads data from the memory 44 and supplies a signal corresponding to the data to the drive circuit 42b. LCD22 is
It has 512 electrodes in the horizontal direction and 342 electrodes in the vertical direction, corresponding to the tablet 21. The drive circuit 42a applies a predetermined voltage to each of the 342 electrodes one by one. Further, the drive circuit 42b sequentially applies voltages corresponding to image data to the 512 electrodes. In this way, each pixel on the LCD 22 is scanned, and the LCD
A predetermined image will be displayed on 22.

FIG. 5 shows a more detailed electrical configuration of the main body 1. The CPU 41 is connected to various ICs via a bus line 57. In addition to the system program for the entire device, the ROM 51 has written therein, for example, a kana-kanji conversion program for the word processor function, a dictionary table therefor, a recognition program for handwritten input, a dictionary table therefor, and the like. The working RAM 52 stores data necessary for operation as needed. A backup battery 54 (separate from the battery 19) is connected to the backup RAM 53, so that necessary data is backed up even when the power to the main body of the apparatus is turned off. The timer IC 55 is connected to the battery 54, counts the clock from the crystal oscillator 56, and outputs the date and time data at that point in time. The above LCD
The controller 43 and tablet controller 46 are also connected to the CPU 41 via a bus line 57.

The audio processing circuit 58 connects the sockets 14 to 1.
A predetermined audio signal is generated in response to an input from 6 or a command from CPU 41, and is output to adder 59. The sound memory 61 is controlled by the CPU 41 and outputs a pre-stored predetermined sound (for example, a warning sound "eh?") to the adder 59. The adder 59 adds the output of the audio processing circuit 58 and the output of the audio memory 61, and outputs the result to the speaker 9 via the audio volume controller 60. A volume changeover switch 12 is connected to the volume controller 60, and the volume can be controlled by operating the switch 12.

The fluorescent screen (backlight section) 26 includes a power circuit 64 (when the power switch 2 is turned on, the battery 1
9 or an AC adapter 17) is supplied via an inverter circuit 63. The brightness of the fluorescent screen 26 can be adjusted to two levels via the inverter circuit 63 by switching the selector switch 11 (for example, a brightness suitable for a bright room and a brightness suitable for a dark room).
can be switched to Separately, by controlling the brightness adjustment switch 3, the brightness of the LCD 22 can be controlled to a desired value in multiple stages. The switch 65a is turned on/off depending on whether the battery 19 attached to the main body 1 is a primary battery or a secondary battery. The switch 65b is connected to the battery 19.
The capacitance of the capacitor is detected and the device is turned on/off depending on the size of the capacitance. These switches 65a, 65b, etc. are connected to the key interface 62 via a power supply circuit 64. The key interface 62 is also connected to the brightness adjustment switch 3, the changeover switch 11, the stop switch 13, and the like. The key interface 62 supplies signals corresponding to on/off of these switches to the CPU 41.

An IC card 70 is connected to the socket 14, and the CPU 41 can exchange data, programs, etc. with the IC card 70 via an IC card interface 66. In addition, sockets 15, 1
6 is connected to an adapter 71, and is connected to the CPU 41 via an expansion interface 68.

FIGS. 6-10 illustrate the operation of the portable computer shown in FIGS. 1-5. 12 to 14 show the display contents of the input screen at each stage of the operation shown in FIGS. 6 to 10. The operation will be described below with reference to these figures.

First, the CPU 41 detects, via the tablet controller 46, that the pen is down, that is, that the pen 6 has touched the tablet 21 (Y in step S1).
ES), it is determined whether the pen down position is the board command area (button) 111 (S3). What is a board command?
This is an input mode change command. When the CPU 41 determines that it is a board command area (YES in S3), it executes the erroneous operation subroutine shown in FIG. 10 (S4).

First, the CPU 41 registers the touched command area name (in this case, "board") in the memory M (S41). Next, the CPU 41 determines whether the pen is up, that is, the pen 6 is released from the tablet 21 (
S42). If the pen is released, the CPU 41 determines whether the pen-up position is inside the command area registered in the memory M (S43). Then, as shown in FIG. 11, if the pen-up position P2 is outside the range of the command area CA that includes the previously pen-down position P1, an error sound "Eh?" is generated (S44). and return to the start. If the pen-up position is inside the command area registered in memory M (YES in S43), CPU4
1 selects a board or input mode (handwriting mode, fax mode, telephone mode, etc.) and processes it (S5).

If the pen-down position is not in the board command area (NO in S3), the CPU 41 determines that the pen-down position is in the move, copy and delete command area 112, 113.
and 114 (S6), and if so, after executing the erroneous operation subroutine S4 of FIG. 10, the characters on the page plate (data display area) 81 are moved, copied, or deleted (S7).

If the pen-down position is not in any of the move, copy, and delete command areas 112, 113, and 114 (NO in S6), the CPU 41 determines whether the pen-down position is in the kana-kanji conversion bar area 115 (S
8) If so, perform kana-kanji conversion (S9).

If the pen-down position is not in the kana-kanji conversion bar area 115 (NO in S8), the CPU 41 determines whether the pen-down position is in the write command area 116 (S10), and if so, in FIG. After execution of the erroneous operation subroutine S4, when there are characters in the square 83, those characters are written on the page plate 81, and when there are no characters, a new line character is written on the page plate 81, respectively.

[0027] The pen down position is in the write command area 11.
6 (NO in S10), the CPU 41 determines whether the pen down position is in the previous deletion command area 117 (S12), and if so, after executing the erroneous operation subroutine S4 in FIG. It is checked whether there are any written characters (S13). Then, if there is, the CPU 41 erases the character in the rightmost square 83 stored in the memory R (in which characters have been written) and the recognition candidate character for that character, and moves the rightmost character one position to the left. , and record this square in memory R. Note that when only the first character is written, the CPU 41 erases that character. If there are no characters written on the type plate 82 (S1
3), the CPU 41 does nothing (S14).

[0028] The pen down position is the previous deletion command area 1.
17 (NO in S12), the CPU 41 determines whether the pen down position is in the "A" command area 118 (S15), and if so, after executing the erroneous operation subroutine S4 in FIG. 118 is inverted. If the previous state is the normal mode, the CPU 41 thereafter displays only alphanumeric characters among the candidate characters in the recognition candidate character display window 84. Note that when the CPU 41 determines that it is an alphanumeric character and there are no candidates, it displays "?". Also, CPU4
1, if the previous state was the alphanumeric mode, from now on the normal mode is set and all candidate characters are displayed in the recognition candidate character display window 84.

Pen down position is "A" command area 1
18 (NO in S15), the CPU 41 determines whether the pen down position is within the recognition command area 119 (S17), and if so, character recognition is started after execution of the erroneous operation subroutine S4 in FIG. If there are unwritten characters, the stroke coded data is recognized (S18) and the character type is displayed (S19).

[0030] The pen down position is in the recognition command area 11.
9 (NO in S17), the CPU 41 determines whether the pen down position is within the recognition candidate character display window 84 (S20), and if so, after executing the erroneous operation subroutine S4 in FIG. It is determined whether there are any candidate characters (S21). In some cases, the CPU 41 erases the last operated character in the grid and outputs the code of the candidate character touched by the pen. If there is no candidate character touched by the pen, the CPU 41 does nothing (S23).

[0031] The pen touch position is in the recognition candidate character display window 8.
4 (NO in S20), the CPU 41 determines whether the pen-down position is within the grid 83 of the type plate 82 (S24). If it is not within square 83, S3
After executing other processing in step 1, the process returns to step S1. Square 83
If within, after executing the erroneous operation subroutine S4 in FIG.
It is determined whether there is a candidate character as a recognition result in the pen-down square 83. In some cases, the CPU 41
3 is blank, that is, the candidate characters in that square 83 are erased, and the candidate character display window 8 recognizes the character candidate print generated by character recognition according to the pen writing corresponding to that character.
4 (S26).

In FIG. 13, the second cell 83 from the left is pen-downed in the state shown in FIG. "ri" (hiragana), "ri" (katakana), "so" (
katakana) is displayed.

If there is no candidate character as a recognition result in the pen-down square 83 (NO in S25), the CPU 41 determines whether there is a character in the recognition candidate character display window 84 (S27).
), the recognition candidate character string for that square is cleared (erased) (S28). For example, as shown in FIG. 14, when a character (in this case, the kanji "ri") is written in the second square 83 from the left, the CPU 41 performs handwritten echo back that matches the stroke, and Stroke coding for recognition is executed and the obtained code is stored (S30).

If there are no characters in the recognition display window 84 (S2
7), the CPU 41 determines whether there is an unfinished stroke echo back in the square 83, and if there is,
The process of step S30 described above is executed. If not, C
The PU 41 records in the memory R that this square is the rightmost end for character input (S31).

Although the above embodiment is an example in which the present invention is applied to a portable computer, the present invention is not limited thereto, and can also be applied to, for example, a desktop computer, a laptop computer, and a medium-sized and large-sized computer.

Further, in the above embodiment, the displayed character is erased in response to the instruction of the recognized and displayed character with the pen, and the character recognition corresponding to the pen writing corresponding to the erased character is performed. Although a CPU is used as a control means for displaying character candidates generated by the above in a predetermined area, the present invention is not limited to this, and for example, dedicated hardware may also be used.

Further, in the above embodiment, a capacitance type tablet was used, but various types of tablets such as electromagnetic induction type, acoustic type, optical type, pressure sensitive type, etc. can be used. In short, any coordinate input device that can detect the position of the pen may be used.

Further, in the above embodiment, an LCD was used as the display device, but various display devices such as a plasma display device and a CRT can be used. However, flat display devices are more convenient.

[0039]

As described above, according to the character recognition display device according to claim 1, the displayed characters are erased in response to the indication of the displayed characters with the pen, so that There is no need to move the input cursor to the character position to be erased.

Further, according to the character recognition display device according to claim 2, character candidates generated by character recognition according to pen writing corresponding to the character to be erased are displayed in a predetermined area, so that the character candidates are displayed in a predetermined area. Selection becomes easier.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the appearance of an embodiment of a portable computer incorporating a character recognition display device of the present invention.

FIG. 2 is a sectional view showing a configuration example of the input screen shown in FIG. 1;

FIG. 3 is a side view showing an example of the configuration of the fluorescent screen shown in FIG. 2;

[Figure 4] LC that constitutes the input screen whose appearance is shown in Figure 1
It is a block diagram showing the electrical connection relationship between D and the tablet.

FIG. 5 is a block diagram showing the overall electrical connections of the computer shown in FIG. 1;

FIG. 6 is a flowchart showing the operation of the computer in FIG. 5;

FIG. 7 is a flowchart showing the operation of the computer in FIG. 5;

FIG. 8 is a flowchart showing the operation of the computer in FIG. 5;

FIG. 9 is a flowchart showing the operation of the computer in FIG. 5;

FIG. 10 is a flowchart showing the operation of the computer in FIG. 5;

FIG. 11 is an explanatory diagram showing the relationship between the pen-down position and the pen-up position when an error sound is generated in the operation shown in FIG. 10;

12 is a diagram showing a display example of the computer screen shown in FIG. 5. FIG.

13 is a diagram illustrating a display example of an erasing operation on the screen of the computer shown in FIG. 5; FIG.

14 is a diagram showing an example of handwritten input corresponding to the stroke encoding operation for character recognition on the computer screen shown in FIG. 5; FIG.

FIG. 15 is a diagram showing an example of a handwriting input area of a conventional portable computer.

[Explanation of symbols]

1 Main body 6 Pen 21 Tablet 22 Liquid crystal display (LCD) 41 CPU 43 LCD controller 46 Tablet controller

Claims (2)

[Claims] 1. A character recognition display device that recognizes and displays characters written by a pen, the character recognition and display device recognizing and displaying characters written by a pen, in response to the recognized and displayed characters being designated by the pen. A character recognition display device characterized by comprising erasing control means. 2. A character recognition display device that recognizes and displays characters written by a pen, wherein the recognized and displayed character is configured to display the designated character in response to the character being designated by the pen. 1. A character recognition and display device characterized by comprising a control means for erasing a character and displaying in a predetermined area a character candidate generated by character recognition corresponding to writing by the pen corresponding to the character to be erased.