JPH0348918A - Character input device - Google Patents

Abstract

PURPOSE:To attain the input and display of many characters via a single screen by deciding a character input position from the start point data applied to a tablet laminated to a display part and enlarging temporarily an input frame to recognize the handwritten characters. CONSTITUTION:When the handwritten characters are inputted to a coordinate input part 1 of a transparent tablet laminated to a display part 2, the start point data and the input character coordinate serial data are stored in an input buffer 3f via an input control part 3b of a process control part 3. At the same time, a large frame is temporarily displayed at the part 2 via a frame data storage part 3e, etc., and the input characters are displayed within the large frame. When the input operation is through, the enlarged frame and characters are erased by the part 3b. Then the handwritten characters are displayed within the original frame. In such a case, the display frame is not fixed so that more characters are displayed on a single screen.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a character input device that inputs handwritten characters, performs character recognition from the handwriting, and displays the recognition results.

(Prior Art) Keyboards are the mainstream input means for data processing devices such as personal computers and word processors, and by operating key switches on the keyboard, users can move to any position on the display screen. Any characters can be entered.

In this case, the characters displayed on the screen are set as small as possible to make them legible, allowing more characters to be displayed on the screen and making effective use of the screen.

However, when using this keyboard, key operations other than character input, such as moving a cursor or converting kanji characters, must be performed, which can be troublesome.

On the other hand, as a means of inputting characters in place of a keyboard, handwritten characters and figures can be entered at any position using a tablet integrated into the display section, and handwritten characters and figures can be input from the input two-dimensional coordinates and stroke information. There is handwritten character recognition technology that recognizes written characters and shapes.

A data processing device that has this kind of function displays the handwriting input during handwriting input, recognizes the input character when the character input is completed, and replaces the character that is the recognition result with the handwriting. It was displayed at the position where handwritten input was entered.

(Problem to be Solved by the Invention) However, in the data processing device having the handwritten character recognition function as described above, a frame indicating the size of characters that can be input by handwriting is displayed in advance, and the handwritten character is displayed within the frame. When input, the recognition result of the human-written characters will be displayed as is within the frame. The size of this frame is determined by conditions such as the performance of the tablet and the user's writing operation, and is considerably larger than the displayed characters in the case of keyboard input. Therefore, the number of characters that can be displayed on the screen of the display unit is limited, making it impossible to display many characters.

Therefore, we set up a specific section as a frame exclusively for handwritten input,
A method may also be considered in which, after recognizing a character input at that position, the resulting character is displayed at an arbitrary position.

However, in this method, in addition to handwritten input, the display position of the recognized character must be specified using a keyboard, etc., and it is not possible to take advantage of the advantage of the data processing device described above that the recognized character is displayed directly at the position where the handwritten input is input. Can not.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a character input device that can input and display more characters on one screen while directly inputting by hand at the desired input position. shall be.

[Structure of the Invention] (Means and Effects for Solving the Problems) The present invention has a coordinate input unit made of a transparent tablet that is laminated and integrated with the display screen and on which handwritten character input is performed. The character input position is determined from the start point data of the coordinate value string input in the coordinate input section, the input frame corresponding to the input position is temporarily enlarged and displayed, and the coordinates of the input character handwritten within the input frame are displayed. After character recognition is performed using the data in the value column, the recognized characters are displayed in the original input frame size before enlargement, and when handwriting is done manually, only the frame at the corresponding position is displayed at the size suitable for handwriting. In order to display the recognized characters in their original size when inputting is completed and character recognition is completed, the screen is temporarily enlarged to allow handwritten characters to be input while specifying the input position. The number of displayed characters can be set to a sufficiently large number.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows its overall structure, in which a transparent tablet 1 serving as a coordinate input section for inputting characters by writing is integrated on a processing control section 3 together with a liquid crystal display 2 serving as a display section.

The transparent tablet 1 has a large number of transparent electrodes arranged in a matrix, detects the position coordinates (x, y) of a designated position, and sends the detected position coordinates to the processing control section 3.

The liquid crystal display 2 is driven and controlled by the processing control unit 3, and displays dots at specified position coordinates (x, y) on the display surface set as an XY coordinate plane, and displays handwriting and characters as a collection of multiple dots. Display patterns, etc. In this way, the coordinate input surface of the transparent tablet 1 and the liquid crystal display 2
The coordinates (x, y) are set to be the same as that of the display surface.

Therefore, the display information such as character patterns displayed on the liquid crystal display 2 can be visually recognized through the transparent tablet 1, and the display position coordinates of the display information such as the character patterns displayed on the liquid crystal display 2 can be visually recognized through the transparent tablet 1. It can be specified directly from l.

Next, the circuit configuration of the processing control section 3 will be mainly explained with reference to FIG. As shown in the figure, the processing control section 3 includes an editing processing section 3a, an input control section 3b, a recognition processing section 3c, a display control section 3d, a frame data storage section 3e, a human power buffer 3r, and a recognition dictionary 3g.

The input control unit 3b inputs the coordinate value string input by hand using the coordinate input unit (transparent tablet) ■ as a character pattern while being permitted by the editing processing unit 3a, and inputs this as a character pattern to the recognition processing unit 3C.
Transfer to. At the same time, this coordinate value month display control section 3d
The handwriting is also transferred in real time to display the handwriting on the display section (display section) 2.

Then, when the input of one character sentence is completed, the display control unit 3
d to erase the handwriting displayed on the display section 2. Further, the input control section 3b notifies the editing processing section 3a of the presence or absence of the writing state at that time and its position based on instructions from the editing processing section 3a.

The recognition processing unit 3C normalizes the coordinate value string data received from the input control unit 3b, compares and collates the coordinate value string data individually with a plurality of character data registered in advance in the recognition dictionary 3g, and as a result, determines the number of characters with small difference. Let be the recognized character of the written input character,
The character code corresponding to the recognized character is output to the editing processing section 3a. The display control section 3d performs erasing on the display section 2 according to instructions from the input control section 3b, and displays frames and characters on the display section 2, and saves and restores display data according to instructions from the editing processing section 3a. .

The editing processing section 3a includes the input control section 3 in the processing control section 3.
b, recognition processing section 3c, display control section 3d, frame data storage section 3es Controls the operation of all the human buffer 3r and recognition dictionary 3g, and at the same time processes the data input by hand. That is, the editing processing section 3a constantly detects the presence or absence of written input, and when it detects that a character has been input into the manual frame of the display section 2, it enlarges and displays the corresponding input frame. Then, when it is determined that character input is finished, the input frame is returned to its original size and displayed,
The character code of the recognized character obtained from the recognition processing section 3c is stored in the input buffer 3r, and the recognized character is displayed at the handwriting input position on the display section 2.

The frame data storage section 3e stores position data of each input frame so that the editing processing section 3a can find the corresponding input frame from the handwriting position. The input buffer 3r stores character codes of input recognition characters, and the recognition dictionary 3g stores normalized coordinate value string data of a large number of characters.

With the above configuration, its operation is shown in FIG.

FIG. 3 mainly shows the contents of the operation processing by the editing processing section 3a, and at the beginning of the operation, first, as shown in step S1, a handwritten input at the coordinate manual section 1 is waited for. This is done by detecting a signal from the input control section 3b, and if it is input, the process proceeds to step S2 and checks whether the human power frame corresponding to the human power coordinate position is displayed on the display section 2. This is determined by comparing the coordinate signal from the input control section 3b and the frame data stored in the crushing data storage section 3e. If there is no corresponding frame, it is determined that the input is not a character input, this process is temporarily terminated, and the operation is executed again from the beginning, but if there is a corresponding frame, the process continues to step S3. , sends a control command to the display control section 3d to enlarge and display the corresponding input frame on the display section 2, and erase the inside of the enlarged frame. At this time, the display control section 3d
In this case, the character data that will be erased by enlarging the frame is saved in advance.

FIG. 4 exemplifies a state in which the input frame is enlarged and displayed in this manner. Here, following "Yama 1) Fat" in the "Name" field, "Higashi" is entered as the first character in the "Address" field, and then the second character is to be entered. In this case, the normally sized frame shown as A is enlarged to the size shown as B, such as the input box for this second character.

When a handwritten input is made within the enlarged frame in the subsequent step S4, the input control section 3b sequentially stores the coordinate value string data in the input buffer 3r and sends a command to display the handwriting to the display control section 3d. In accordance with this command, the display control section 3d displays handwriting according to the writing motion within the enlarged input frame of the display section 2 using the coordinate value string data stored in the input buffer 3r. When the input of a one-character sentence is completed, the input control unit 3b determines this based on the time when the signal due to the written input is interrupted, and sends the coordinate value string data of the one-character sentence stored in the input buffer 3 to the recognition processing unit 3c. While transferring the handwriting, the display control unit 3d is instructed to erase the handwriting displayed within the expanded input frame.Recognition processing unit 3c
normalizes the coordinate value string data transferred from the input buffer 3r, and compares the data individually with a large number of normalized character data stored in the recognition dictionary 3g. As a result of this comparison, the character data with the smallest difference is determined to be a recognized character, and the character code corresponding to that character is sent to the editing processing section 3a. The editing processing unit 3a restores the display of the enlarged input frame in step S5 according to this character code, and then
Recall the character data that was saved by expanding the frame,
This process is then newly displayed on the display unit 2 together with the recognized characters.

Note that in the above embodiment, the enlarged input frame is returned to its original size after character recognition, but this is not the only option, and handwritten input is not limited to only characters, but can include symbols as well. It includes.

Furthermore, although an example has been shown in which the end of input for one character is determined based on the time after the input stops, it may be determined when handwritten input is made outside the expanded input frame.

[Effect of the Invention J As described in detail above, the present invention has a coordinate input section consisting of a transparent tablet that is laminated and integrated with the display screen and on which handwritten character input is performed. Determine the input position of the character from the starting point data of the coordinate value string to be input, temporarily enlarge and display the input frame corresponding to the input position, and display the data of the coordinate value string of the input character handwritten within that input frame. After character recognition is performed, the first character is displayed in the original input frame size before enlargement, so when handwriting input is performed, only the frame at the corresponding position is temporarily resized to a size suitable for handwriting. In order to display the recognized characters in their original size when input is completed and character recognition is completed, it is possible to input handwritten characters and specify the input position, instead of displaying them on a single screen. It is possible to provide a character input device in which a sufficiently large number of characters can be set.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the circuit configuration of an embodiment of the present invention, Fig. 2 is a diagram showing the overall structure of Fig. 1, Fig. 3 is a flowchart showing processing contents, and Fig. 4 is an example of a display screen. This is a diagram. l... Coordinate input section (transparent tablet) 2... Display section (liquid crystal display) 3... Processing control section, 3a.
...Editing processing unit, 3b...Input control unit, 3c...Recognition processing unit, 3d...Display control unit, 3e...Frame data storage unit, 3"...Input buffer, 3g...・Recognition dictionary. Figure 1

Claims (1)

[Scope of Claims] A display section; A coordinate input section consisting of a transparent tablet that is laminated and integrated with the screen of the display section and on which handwritten characters can be input; and a starting point of a coordinate value string to be input using the coordinate input section. a determination means for determining the input position of a character from data; a display control means for displaying on the display section an enlarged input frame corresponding to the input position determined by the determination means; A character input device comprising a character input means for continuing handwritten character input, and a character recognition means for performing character recognition from coordinate value string data obtained by the character input means at a coordinate input section.