KR20110012217A - Writing discernment system using electric pen - Google Patents

Abstract

PURPOSE: A system for recognizing a note by using electronic pen is provided to automatically store content about note which lecture writes on a projector. CONSTITUTION: A piezoelectric sensor(110) of an electronic pen(10) converts a electric potential signal generated from a piezoelectric sensor during writing into a distance signal. A character conversion unit(230) of a projector reads the location of an electronic pen from the displacement signal. Based on note content, the letter conversion unit performs conversion to a letter. A letter output control unit(240) performs control operation to enable a converted letter to be projected on screen.

Description

Handwriting recognition system using electronic pen {Writing Discernment System Using Electric Pen}

The present invention relates to a handwriting recognition system using an electronic pen, and more particularly, when writing using an electronic pen on a screen area projected by a projector, a position is read by a piezoelectric sensor formed in the electronic pen, and the handwriting is recognized and specified. The present invention relates to a handwriting recognition system using an electronic pen capable of converting a character into a character body and projecting the converted content back to a projector and freely changing the character body of the recognized writing content.

In general, when a lecturer conducts an offline class, when writing is needed, a method of writing a necessary content on a board or a board using a writing tool is used.

However, in general, lecturers conduct lectures by using the projector to project materials onto a blackboard or a separate screen, and in order to take notes, the lecturer must use the non-projected area of the blackboard or turn off the projector. There was an inconvenience.

In addition, in order to re-learn what is written on the board or board later, the lecturer should write down what he wrote in the notebook, which reduces his focus on the lecture. There was.

In addition, when the lecturer is a bad writing, it is difficult for the learner to distinguish the letters, which causes frequent queries from the learners and also reduces the concentration.

In order to solve the above problems, an object of the present invention is to recognize the writing and read the position by the piezoelectric sensor formed on the electronic pen when the lecturer writes using the electronic pen on the screen area projected by the projector The present invention provides a handwriting recognition system using an electronic pen for storing handwritten contents and allowing a learner to freely change the font of the recognized handwritten contents.

In order to achieve the above object, a handwriting recognition system using an electronic pen according to the present invention uses an electronic pen having a piezoelectric sensor and a projected screen area as coordinates, and is located from information sensed by the piezoelectric sensor of the electronic pen. It is characterized in that it comprises a projector for reading and recognizing the writing content.

The electronic pen may include a piezoelectric sensor for converting a potential signal generated from the piezoelectric sensor into a displacement signal and a wireless transmitter for wirelessly transmitting the converted displacement signal to the projector.

The projector reads the position of the electronic pen from the wireless receiving unit for receiving the displacement signal transmitted from the piezoelectric sensor, the coordinate setting unit for setting the coordinates to the screen area projected by the projector, and the position of the electronic pen from the received displacement signal. Character recognition unit for recognizing and converting the characters to the character, Character output control unit for controlling to project the converted character on the screen and characterized in that it comprises a memory for storing the recognized handwritten content.

In addition, the character conversion unit converts the relative coordinate value through the displacement signal to the absolute coordinate value to read the position of the electronic pen position reading module and the character to convert the writing content formed by the received displacement signal to the character of the specified font Characterized in that it comprises a conversion module.

Here, the character conversion module is characterized by comparing the character data formed by the displacement signal and the characters stored in the memory to extract and convert the matching characters.

The character conversion module may store the character code of each font in the memory to change the font of the converted character.

As described above, the handwriting recognition system using the electronic pen according to the present invention not only automatically stores the contents of the lecturer's writings in the projector, but even if the lecturer is a bad writing, the learner writes the characters converted into specific fonts in real time. The content can be easily understood, resulting in an excellent effect of increasing the concentration of the lecture.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a system configuration diagram schematically showing a handwriting recognition system according to a preferred embodiment of the present invention, Figure 2 is a detailed block diagram of FIG.

1 and 2, the handwriting recognition system according to the present invention uses the electronic pen 10 having a piezoelectric sensor and the projected screen area as absolute coordinates, and uses information sensed from the piezoelectric sensor of the electronic pen. It may be configured to include a projector 20 to read the position to recognize the writing content.

Here, the projector 20 includes a basic configuration for projecting a variety of files on the screen through the projection unit, the basic configuration of the projector is obvious to those skilled in the art as well as at the core of the present invention Since the detailed description is omitted, only the core configuration related to the features of the present invention will be described.

The electronic pen 10 may include a piezoelectric sensor 110 for converting a potential signal generated from the piezoelectric sensor into a displacement signal during writing and a wireless transmitter 120 for wirelessly transmitting the converted displacement signal to the projector. Can be.

Here, the piezoelectric sensor 110 may be formed on the nib portion of the electronic pen, the potential difference occurs when the lecturer pressed the piezoelectric sensor when writing, and converts the generated potential difference signal into a displacement signal, the wireless transmitter 120 Send to the projector 20 through.

In addition, the projector 20 coordinates the coordinates from the wireless receiver 210 for receiving the displacement signal transmitted from the piezoelectric sensor 110 and the coordinate setting unit 220 for setting the background coordinates and the received displacement signal. It may include a character conversion unit 230 for recognizing and converting the displacement signal to a character, and a character output control unit 240 and a memory 250 for controlling the converted character to be projected through a projector.

The wireless transmitter 110 of the electronic pen and the wireless receiver 210 of the projector may be a conventional wireless communication method such as infrared communication or Bluetooth.

The coordinate setting unit 220 may include a program for setting the boundary of the area where the projector is projected to absolute coordinates. Therefore, the absolute coordinate is determined according to the size of the screen projected by the projector. As a result, as shown in Fig. 3, the boundary (four corners) of the area where the projector is projected becomes the reference position of the absolute coordinate.

When the displacement signal is received from the electronic pen 10, the character conversion unit 230 converts the displacement signal into a relative coordinate value to an absolute coordinate value to read the position of the electronic pen, and the character data formed by the received displacement signal. It is responsible for converting to the characters of the specified font.

More specifically, a coordinate setting device such as a trackball mouse is provided inside the piezoelectric sensor to set relative coordinates. Here, when the screen relative to the movement of the pen moves along the x, y axis of the coordinates, the character conversion unit 230 is mapped to the absolute coordinates set by the coordinate setting unit 220 according to the movement Character codes can be converted to match. Since the method of reading the position of the electronic pen is the same as the method of reading the position of a conventional mouse, a detailed description thereof will be omitted.

In addition, when the lecturer writes, the displacement signal also moves in a constant trajectory according to the movement of the electronic pen, and the moved displacement signal forms text data having a specific pattern. Characters matching to are extracted from memory and converted into characters.

Here, all forms expressed by handwriting such as letters, numbers, and symbols will be defined as letters.

" 문자가 전자펜에 의해 입력되어 수신된 경우 "전"자의 경우 상기 문자변환부가 문자변환 알고리즘을 이용하여 자음인 "ㅈ"와 모음인 "ㅓ"와 자음인 "ㄴ"의 조합으로 인식하여 "전"으로 변환한다.E.g, "

"When a character is input by the electronic pen and received, in the case of" before ", the character conversion unit recognizes a combination of the consonant" ㅈ ", the vowel" ㅓ "and the consonant" b "using the character conversion algorithm, and" To "before".

Here, the character conversion algorithm is an algorithm that analyzes the written character and extracts and converts a matching character from among the characters stored in the memory, which is obvious to those skilled in the art, and thus, a detailed description thereof will be omitted.

In addition, the character converter 230 may convert the recognized character into a predetermined specific font, and may convert the converted font into another font in various ways. To this end, the character converter may store various font characters in the memory.

The converted characters are projected onto the screen under the control of the character output control unit 240 of the projector. The text output controller 240 may control the projected text to be synchronized with the lecture data when the text is written on the lecture data.

In other words, the lecturer can take notes from the electronic pen and convert them into text in real time in the projector.

In this way, even if the lecturer is a bad writing, the learner can easily check the contents by converting the text into a character of a specific typeface in real time.

Hereinafter, a handwriting recognition storage method according to an exemplary embodiment of the present invention will be described.

4 is a flowchart schematically illustrating a method of storing handwriting recognition in accordance with a preferred embodiment of the present invention.

Referring to FIG. 4, first, the projector 20 is projected onto a target surface to form a screen (S110).

Here, the object surface means a surface of a blackboard, a board, a wall surface, etc. on which the projector is projected and displayed, and the screen means the entire area where the projector is projected.

In this case, when writing on the lecture data file, the lecture data is activated, and when the lecturer writes in a blank space other than the lecture data, the writing is done on the blank screen.

If the projector 20 has a built-in processor, the lecture material stored in the projector may be activated. If the projector 20 does not have a built-in processor, the lecture data stored in the computer terminal may be activated by being connected to an external computer terminal.

When the projector 20 is projected onto the target surface, the coordinate setting unit 220 detects the size of the screen and sets absolute coordinates (S120).

The coordinate setting unit 220 sets coordinates by a program for setting absolute coordinates based on the edges (four corners) of the screen.

Subsequently, when the lecturer writes using the electronic pen 10 on the screen, the projector receives a displacement signal from the piezoelectric sensor 110 of the electronic pen (S130).

More specifically, when the lecturer writes with the electronic pen on the screen, a potential difference is generated by the pressure applied by the electronic pen, and the piezoelectric sensor 110 converts the potential difference into a displacement signal. The converted displacement signal is wirelessly transmitted to the projector 20 through the wireless transmitter 120 of the electronic pen. Here, the displacement signal generates a continuous signal while the lecturer writes, and the displacement signals are gathered to form text data having meaning.

When the displacement signal is received, the character conversion unit 230 of the projector reads the position of the electronic pen on the absolute coordinates of the screen to recognize the character.

More specifically, the character conversion unit 230 reads the position by converting the relative coordinates of the electronic pen by the displacement signal into absolute coordinate values corresponding to the absolute coordinates provided by the coordinate setting unit 220, and continuously displaced. The signal value forms the character data, thereby recognizing the character.

Subsequently, a character matching the character data is extracted from the memory 250 and converted into a character (S150).

Here, the converted characters may be converted into a predetermined font (for example, a background font) and converted into various fonts desired by the user.

Subsequently, the converted characters are projected in real time by the character output control unit 240 of the projector.

If the lecturer's text data cannot be identified so that it cannot be converted into text, the written text data is output as it is.

If the character is recognized as described above and the writing of the lecturer is finished, the written contents are stored.

If it is written on the lecture data, the content written on the lecture data file may be stored, and if it is written on a blank screen, it may be stored as a separate file.

As the lecturer's notes are automatically saved as described above, learners do not have to take notes, they can concentrate on the class without having to lose their concentration due to the notes, and the contents of the lectures are projected by the projector. Because it is stored, the learner can be very useful when reviewing.

 While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

1 is a system configuration diagram schematically showing a handwriting recognition system according to a preferred embodiment of the present invention, Figure 2 is a detailed block diagram of FIG.

3 is an exemplary view showing coordinate setting according to a preferred embodiment of the present invention.

4 is a flowchart schematically illustrating a method of storing handwriting recognition in accordance with a preferred embodiment of the present invention.

Claims (6)

An electronic pen having a piezoelectric sensor; And a projector using the projected screen area as coordinates, reading a position from information sensed by the piezoelectric sensor of the electronic pen, and recognizing and storing the writing content. The method of claim 1, The electronic pen A piezoelectric sensor for converting a potential signal generated from the piezoelectric sensor into a displacement signal during writing; And a wireless transmitter for wirelessly transmitting the converted displacement signal to the projector. 3. The method of claim 2, The projector A wireless receiver which receives the displacement signal transmitted from the piezoelectric sensor; A coordinate setting unit that sets coordinates to a screen area projected by the projector; A text converter configured to read a position of the electronic pen from the received displacement signal, recognize a written content, and convert the written content into a text; A character output control unit for controlling the singulated-converted character to be projected onto the screen; And a memory for storing the recognized writing content. The method of claim 3, wherein The character conversion unit A position reading module for reading a position of the electronic pen by converting a relative coordinate value through the displacement signal into an absolute coordinate value; And a text conversion module for converting the writing content formed by the received displacement signal into a character of a designated typeface. The method of claim 4, wherein The character conversion module A handwriting recognition system using an electronic pen, characterized by comparing the character data formed by the displacement signal with the character stored in the memory and extracting the matching character. The method of claim 5, The character conversion module The character code of each font is stored in the memory Handwriting recognition system using an electronic pen, characterized in that the font of the converted character can be arbitrarily changed.

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