Patent Publication Number: US-2012045746-A1

Title: Electronic class system

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority from and the benefit of Korean Patent Application No. 10-2010-0081392, filed on Aug. 23, 2010, which is hereby incorporated by reference for all purposes as if fully set forth herein. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an electronic class system. More particularly, the present invention relates to an electronic class system which enables a digitalized class, wherein breaking from a conventional class method or an examination method using paper teaching materials for class and a blackboard for writing class contents, the digitalized class uses an electronic pen which is a digitalized writing tool for generating writing data, a computer which communicates with the electronic pen to receive the writing data generated by the electronic pen, and a smart board which serves as a blackboard, on which the writing data received by the computer is projected as beams. 
     2. Description of the Prior Art 
     Despite abrupt development of communication technologies and electronic appliances, a class is still performed in such a manner that a teacher gives a lecture while writing class contents on a blackboard, and one or more students take a lesson while seeing the contents written on the blackboard and a paper teaching material for class and executing writing on the paper teaching material for class or a notebook with a writing tool, such as a pencil, simultaneously with listening to the lecture. In such a conventional class method, in order for the teacher or all of the students to see the contents written by any one of the students or the teacher, the corresponding contents should be written on the blackboard. 
     In a conventional examination method, examination papers with written examination questions should be distributed to students, and the students should submit the examination papers after writing answers to the questions on the examination papers. 
     SUMMARY OF THE INVENTION 
     Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide an electronic class system which enables a digitalized class, wherein breaking from a conventional class method or examination method using paper teaching materials for class and a blackboard for writing class contents, the digitalized class uses one or more electronic pens, each of which is a digitalized writing tool for generating writing data, a computer communicating with the electronic pens to receive the writing data (student writing data or lecturer writing data) generated by the electronic pens, and a smart board which serves as a blackboard on which the writing data (student writing data or lecturer writing data) received by the computer is projects as beams. 
     Another object of the present invention is to provide an electronic class system which allows contents written by a teacher or a student to be automatically displayed on a smart board if the teacher or the student writes the contents using an electronic pen, without the necessity of writing the contents on a blackboard so as to allow all of the students or the teacher to see the contents written by the teacher or the student. 
     Another object of the present invention is to provide an electronic class system capable of automatically transmitting answers to examination questions to a teacher&#39;s computer when a student writes the answers using an electronic pen, even if the student does not submit an examination paper with the answers written by the student. 
     In order to accomplish these objects, there is provided an electronic class system including: a dot book printed with a dot pattern, on which class contents or examination questions are described; a student electronic pen which generates and transmits student writing data by recognizing the dot pattern at the points where the student electronic pen comes into contact with the dot book according to student writing on the dot book; a computer which receives and outputs the student writing data through a beam projector interface; a beam projector which receives the student writing data outputted through the beam projector interface, and projects the student writing data as beams; and a smart board, on which the contents written by the student are displayed by the beams projected by the beam projector. 
     In accordance with another aspect of the present invention, there is provided an electronic class system including: a student electronic pen which generates and transmits student writing data by recognizing a dot pattern at the points where the student electronic pen comes into contact with a dot book printed with the dot pattern according to student writing on the dot book; a computer which receives and renders the student writing data to be projected as beams through a beam projector interface; and a smart board, on which the contents written by the student are displayed by the beams projected by the beam projector. 
     In accordance with another aspect of the present invention, there is provided an electronic class system including: a student electronic pen which generates and transmits student writing data by recognizing a dot pattern at the points where the student electronic pen comes into contact with a dot book printed with the dot pattern according to student writing on the dot book; a computer which receives and outputs the student writing data through a beam projector interface; a beam projector which receives the student writing data outputted through the beam projector interface, and projects the student writing data as beams; and a smart board, on which the contents written by the student are displayed by the beams projected by the beam projector. 
     As described above, according to the present invention, it is possible to provide an electronic class system which enables a digitalized class, wherein breaking from a conventional class method or examination method using paper teaching materials for class and a blackboard for writing class contents, the digitalized class uses one or more electronic pens, each of which is a digitalized writing tool for generating writing data, a computer communicating with the electronic pens so as to receive the writing data (student writing data or lecturer writing data) generated by the electronic pens, and a smart board which serves as a blackboard on which the writing data (student writing data or lecturer writing data) received by the computer is projected as beams. 
     According to the present invention, it is also possible to provide an electronic class system which allows contents written by a teacher or a student to be automatically displayed on a smart board if the teacher or the student writes the contents using an electronic pen, without the necessity of writing the contents on a blackboard so as to allow all of the students or the teacher to see the contents written by the teacher or the student. 
     According to the present invention, it is also possible to provide an electronic class system capable of automatically transmitting answers to examination questions to a teacher&#39;s computer when a student writes the answers using an electronic pen, even if the student does not submit an examination paper with the answers written by the student. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: 
         FIG. 1  shows an electronic class system in accordance with an embodiment of the present invention; 
         FIG. 2  shows an example of transmitting student writing data so as to display student writing on a smart board, wherein the student writing is executed on a dot book using a student electronic pen in the inventive electronic class system; 
         FIG. 3  shows an example of transmitting lecturer writing data so as to display lecturer writing on a smart board, wherein the lecturer writing is executed using at least one of a lecturer electronic pen, a tablet device, and a computer (tablet computer) in the inventive electronic class system; 
         FIG. 4  shows an example of transmitting lecturer writing data corresponding to lecturer writing contents directly written on a smart board by a lecturer using a smart board electronic pen in the inventive electronic class system; and 
         FIG. 5  shows a smart board printed with a dot pattern in an electronic class system in accordance with an embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same elements will be designated by the same reference numerals although they are shown in different drawings. Further, in the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. 
     In addition, terms, such as first, second, A, B, (a), (b) or the like may be used herein when describing components of the present invention. Each of these terminologies is not used to define an essence, order or sequence of a corresponding component but used merely to distinguish the corresponding component from other component(s). It should be noted that if it is described in the specification that one component is “connected,” “coupled” or “joined” to another component, a third component may be “connected,” “coupled,” and “joined” between the first and second components, although the first component may be directly connected, coupled or joined to the second component. 
       FIG. 1  shows an electronic class system  100  in accordance with an embodiment of the present invention. 
     As shown in  FIG. 1 , the electronic class system  100  in accordance with an embodiment of the present invention includes: a dot book  110  and a student electronic pen  120  which are provided as in a pair for each of students (student A, student B, . . . , student F); a computer  130  communicating with each of the student electronic pens  120  in a predetermined communication mode so as to receive student writing data; a beam projector  140  receiving student writing data from the computer  130  and projecting the student writing data as beams; and a smart board  150 , on which the beams projected by the beam projector  140  are imaged. 
     A dot book  110  and a student electronic pen  120  are the pair of class tools used by one student for taking a lesson or taking an examination. 
     The dot book  110 , which is one of a pair of class tools, is a digital type learning material which is printed with a dot pattern recognizable by the student electronic pen  120 , and has class contents or examination questions written on the printed dot pattern. 
     The student electronic pen  120 , which is the other of the pair of class tools, generates student writing data by recognizing the dot pattern at the points where it comes into contact with the dot book  110  in accordance with student writing on the dot book  110 , and transmits the generated student writing data to the computer  130 . That is, if a student executes writing on his/her dot book  110  with his/her own student electronic pen  120 , the student electronic pen  120  can recognize the dot pattern at the points where it comes into contact with the dot book  110 , and can generate student writing data corresponding to the student writing on the basis of recognized information (e.g., coordinate values of dots (position information) or the like included in the dot pattern). 
     The above-mentioned student electronic pen  120  stores information for the dot pattern printed on the dot book  100 , wherein the student electronic pen  120  can recognize the dot pattern at the points where the student electronic pen  120  come into contact with the dot book  110  using a camera or a scanner with reference to the stored information for the dot pattern (e.g., the coordinate values of the dots or the like), and can generate the student writing data by determining the traces of the student writing. 
     The above-mentioned computer  130  communicates with the student electronic pen  120  of each student, and receives student writing data from the student electronic pen  120 , and outputs the received student writing data through a beam projector interface so that the student writing executed by the student electronic pen  120  can be displayed on the smart board. 
     On the basis of the student writing data received from the student electronic pen  120 , the computer  130  can generate output data to be outputted to the beam projector interface (or monitor interface) using a program for configuring an output screen. For example, if plural student writing data were received from plural student electronic pens  120 , the computer  130  can generate an output data which divides the entire output screen into plural sub-screens so that each of the sub-screens can display student writing corresponding to one student writing data. 
     As a result, the beam projector  140  receives student writing data outputted through the beam projector interface of the computer, and projects the student writing data onto the smart board  150  as beams. On the smart board  150 , student writing is displayed by the beams projected by the beam projector  140 . The monitor of the computer  130  displays a screen equal to the screen displayed on the smart board by the beams projected from the beam projector  140 . 
     Referring to  FIG. 1 , the inventive electronic class system  100  may further include at least one of a lecturer electronic pen  160  and a tablet device  170 , wherein the lecturer electronic pen  160  recognizes lecturer writing data by recognizing the dot pattern at the points where the lecturer electronic pen  160  comes into contact with the dot book  110  in accordance with lecturer writing on the dot book  110 , and generates and transmits lecturer writing data to the computer  130 , and wherein the tablet device  170  recognizes the dot pattern at the points where it comes into contact with the dot book  110  or a specific plate  171  in accordance with lecturer writing on the dot book  110  or the specific plate  171 . 
     If the lecturer electronic pen  160  and/or the tablet device  170  are used, the contents to be explained can be displayed on the smart board  150  by the lecturer (teacher). 
     For this purpose, the computer  130  outputs at least one of lecturer writing data from the lecturer electronic pen  160  and lecturer writing data generated using the dot pattern recognized by the tablet device  170  through the beam projector interface, the beam projector  140  receives the lecturer writing data outputted through the beam projector interface of the computer, and projects the lecturer writing data as beams, and the lecturer writing is displayed on the smart board by the beams projected from the beam projector  140 . 
     In order to display the contents to be explained or the like on the smart board  150 , the lecturer may use the computer  130 , besides the lecturer electronic pen  160  and/or the tablet device  170 . In such a case, the computer  130  should be a tablet computer including a touch screen on which the dot pattern is printed. As such, the computer  130  generates lecturer writing data by recognizing the dot pattern at the points touched in accordance with the lecturer writing on the touch screen, and outputs the generated lecturer writing data through the beam projector interface, the beam projector  140  receives the lecturer writing data outputted through the beam projector interface of the computer  130 , and projects the lecturer writing data as beams, and the lecturer writing is displayed on the smart board  150  by the beams projected by the beam projector  140 . 
     Referring to  FIG. 1 , the inventive electronic class system  100  is adapted to be capable of displaying at least one of student writing and lecturer writing not only through the beam projector  140 , but also on a monitor  180  of a television set or the like. For this purpose, as shown in  FIG. 1 , the inventive electronic class system  100  may further include a monitor  180  which can display at least one of student writing data received from one or more student electronic pens  120  by the computer  130 , and lecturer writing data generated by at least one of the lecturer electronic pen  160 , the tablet device  170  and the computer, by receiving them through the monitor interface. 
     As described above, the smart board  150  displays student writing corresponding to student writing data generated by other devices (including at least one of a student electronic pen  120 , a computer  130 , a lecturer electronic pen  160 , and a tablet device  170 ) and/or lecturer writing corresponding to lecturer writing data by a beam projection mode. Besides this function, the lecturer writing may be executed on the smart board  150  by a lecturer, and may be recognized by a smart board electronic pen  190 . For this purpose, a dot pattern may be printed on the smart board  150 . 
     If the dot pattern is printed on the smart board  150  like this, the inventive electronic class system  100  may further include a smart board electronic pen  190  which generates lecturer writing data by recognizing the dot pattern at the points where it comes into contact with the smart board  150 , and transmits the generated lecturer writing data to the computer  130 . 
     In such a case, the computer  130  may output the lecturer writing data received from the smart board electronic pen  190  to a beam projector interface or a monitor interface. 
     In addition, the above-mentioned smart board electronic pen  190  may recognize the dot pattern at the points where the smart board electronic pen  190  comes into contact with a specific part displayed on the smart board by the beams projected from the beam projector  140 . In such a case, the smart board electronic pen  190  may conduct a process corresponding to the specific part or transmit the recognized information of the specific part to the computer  130 . Upon receiving the recognized information of the specific part from the smart board electronic pen  190 , the computer  130  can conduct the process corresponding to the specific part. For example, the smart board electronic pen  190  or the computer  130  can recognize the text contents written in the specific part, and conduct a process for at least one of a dictionary function or a voice output function for the recognized text contents. As a result, like the case in which a user selects a specific icon shown on the monitor of the computer so as to implement the corresponding function while seeing the computer monitor, the user can select the specific part displayed on the smart board  150  while seeing the smart board  150 , so that the corresponding function can be implemented by the smart board electronic pen  190  or the computer  130 . 
     The smart board electronic pen  190  stores information for the dot pattern printed on the smart board  150 , wherein the smart board electronic pen  190  can recognize the dot pattern at the points where it comes into contact with the smart board  150  using a camera or a scanner with reference to the stored information for the dot pattern (e.g., coordinate values of dots), and can generate lecturer writing data by determining the traces of the lecturer writing on the basis of the recognized information (e.g., coordinate values of dots). 
     Electronic pens, including the above-mentioned student electronic pen  120 , lecturer electronic pen  160 , and the smart board electronic pen  190 , and the computer  130  may communicate with each other on the basis of wired or wireless communication. In the case of wired-based communication, the electronic pens and the computer  130  may communicate with each other via a wired communication network or by being directly interconnected with each other by cable lines. In the case of wireless-based communication, the electronic pens and the computer  130  may communicate with each other by being interconnected with each other through APs (Access Points), or a Bluetooth or infrared system without such an AP. 
     The student electronic pen  120  recognizes the dot pattern at the points where it comes into contact with the dot book  110 , thereby acquiring the position information items of the recognized dot pattern (e.g., coordinate values of the dots or the like), wherein the student electronic pen  120  can generate student writing data including the acquired position information items, student writing data including writing trace data in accordance with the acquired position information items, or student writing data including a writing trace image in accordance with the acquired position information items. In the same manner, the lecturer electronic pen  160  and the smart board electronic pen  190  can generate lecturer writing data. In addition, the computer  130  may receive position information items of the points where the tablet device  170  and the specific plate  171  come into contact with an electronic pen from the tablet device  170  or a tablet function module of the computer  130 , and generate lecturer writing data in the same manner with the generation of the student writing data. 
     The above-mentioned computer  130  may store the student writing data received through the student electronic pen  120 , and/or the lecturer writing data received through the lecturer electronic pen  160  and the smart board electronic pen  190 . The computer  130  may store (record) the lecture contents, class results for a corresponding student, and writing contents of the student and/or lecturer using the transmitted/received data, and may upload the stored data onto a server with internet access so that the stored data can be used in an online class or the like. 
     When examination questions are written on the dot book  110 , the above-mentioned computer  130  may receive student writing data through the student electronic pen  120  as answers to the examination questions, and may store or output scoring result data or answer analysis data based on the student writing data to the beam projector interface or monitor interface. 
     All of the above-mentioned student electronic pen  120 , lecturer pen  160  and smart board electronic pen  190  have the same function, except the users and uses thereof. However, the implemented forms and shapes thereof may be different from each other. 
     In connection with the electronic class system  100  in accordance with an embodiment of the present invention, the data flow of student writing data and lecturer writing data in the electronic class system  100  will be discussed below. 
       FIG. 2  shows an example of transmitting student writing data so as to display, on the smart board  150 , student writing executed by a student on the dot book  110  in the inventive electronic system. 
       FIG. 2  is an example of transmitting student writing data for writing contents (student writing) written on the dot book by Student A among plural students, using his/her own student electronic pen  120 , wherein it is assumed that the student electronic pen  120  and the computer  130  communicate with each other through an AP  220  with a wireless communication mode. 
     Referring to  FIG. 2 , if Student A writes contents  2000  on the dot book  110  with his/her own student electronic pen  120 , the student electronic pen  120  recognizes the dot pattern at the points where it comes into contact with the dot book  110 , and generates student writing data on the basis of the recognized dot pattern. The student electronic pen  120  transmits the student writing data generated in this manner to the computer  130  through the AP  220 . 
     Referring to  FIG. 2 , the computer  130  generates an output data to be outputted to the beam projector  140  (or monitor  180 ) using a program for configuring an output screen, so as to display the writing contents  2000  of Student A on the basis of the student writing data received from the student electronic pen  120  of Student A. At this time, the output data may be generated by using the student writing data of any other student together with the student writing data of Student A. A program for configuring an output screen may divide the entire screen into a plurality of sub-screens, the number of which corresponds to the number of the students, so that each sub-screen displays student writing contents according to the student writing data of one corresponding student. 
     Referring to  FIG. 2 , the computer projects the output data containing student writing data concerned with Student A to the smart board  150  as beams through the beam projector  140 , so that the writing contents  2000  of Student A are displayed on the corresponding sub-screen. On the screen  200  projected to the smart board in this manner, student writing contents according to the student writing data of all of the students (Student A, Student B, Student C, Student D, Student E, Student F) may be displayed separately from student to student. 
     In addition, the computer  130  may also output the output data containing the student writing data concerned with Student A on the screen  210  of the computer monitor or the monitor  180  of a television set or the like in the same manner, so that the writing contents  2000  of Student A configured in the screen  210  can be displayed on the corresponding sub-screen. 
     In the above, it has been described with reference to  FIG. 2  that in order to allow student writing contents written by a student using a student electronic pen  120  to be displayed on the smart board  150 , student writing data is generated by the student electronic pen  120 , and the generated student writing data is transmitted from the student electronic pen  120  to the beam projector through the computer  130 . Now, concerning a case in which a lecturer writes class contents or solutions to questions as lecturer writing contents using a lecturer electronic pen  160 , a tablet device  170  or a computer  130  which is a tablet computer, description will be made as to an example of transmitting the lecturer writing data so that the lecturer writing contents can be displayed on the smart board  150  with reference to  FIG. 3 . 
     When an OMR (Optical Mark Reader) card printed with a dot pattern which allows answers to multiple choice questions to be checked using a student electronic pen  120  is used instead of the dot book  110 , the student electronic pen  120  may confirm the answers checked on the OMR card in accordance with the dot pattern recognition method so as to generate student writing data containing answer check information, and may transmit the student writing data containing the answer check information to the computer  130 . 
     After receiving the student writing data containing the answer check information, the computer  130  may project the answer check information contained in the student writing data to the smart board  150  so that the answer check information can be displayed, or may not project the answer check information contained in the student writing data to the smart board  150  for the purpose of preventing students&#39; misuse of answer check information or protecting students&#39; privacy. 
     The computer  130  may perform scoring through an automatic scoring module using the answer check information contained in the received student writing data and may store the results. In addition, the computer  130  may collect and statistically process the scoring results of respective students, thereby generating various statistic and analysis data, such as the percentages of correct answers and incorrect answers, which may be stored in the computer  130  or may be projected to the smart board  150  to be displayed. 
     In addition, the computer  130  may analyze the scoring results of a corresponding student, and may store the strength and vulnerabilities of the student and learning proposal information according to the analysis together with the scoring results, so that the computer  130  can transmit them to the email or computer of the corresponding student as required. 
     According to the embodiment described just before, it is possible to perform the analysis of scoring results and the feedback of incorrect answers directly after the termination of test using an OMR card. As a result, the processes of testing, scoring, analysis of results, and feedback in a conventional testing method can be rapidly executed in class, which can further enhance learning effects for a test. 
     In addition, according to the inventive electronic class system  100 , it is possible for each student to compare his/her answers or solving procedures with those of other students in class through a test using an OMR card and an electronic pen  120 , or an essay or short-answer test. As a result, more efficient learning can be accomplished since students can share their thought processes. For this purpose, the above-mentioned computer  130  may collect student writing data containing test answers generated using OMR cards and electronic pens  120 , or essay-answer test answers or short-answer test answers generated using the dot book  110  and the electronic pens  120 , so that students can share various thought processes thereof on the basis of the collected student writing data through an application for a data comparing mode. 
       FIG. 3  shows an example of transmitting lecturer writing data so as to display lecturer writing contents on the smart board  150 , wherein the lecturer writing contents are written by a lecturer using at least one of a lecturer electronic pen  160 , a tablet device  170 , and a computer  130  in the inventive electronic class system  100 . 
     Referring to  FIG. 3 , the lecturer can write lecturer writing contents  3000  using at least one of a lecturer electronic pen  160 , a tablet device  170  and a computer  130 . Here, the lecturer writing contents  3000  may be written class contents, question solving contents, contents for correction or the like. In the example of  FIG. 3 , it is assumed that the lecturer writing contents  3000  are concerned with Student B. 
     The computer  130  receives lecturer writing data generated by recognizing the lecturer writing contents  3000  written by the lecturer electronic pen  160 , lecturer writing data generated using the recognized information for the lecturer writing contents  3000  recognized by the tablet device  170 , or lecturer writing data generated using the recognized information for the lecturer writing contents  3000  recognized through a touch screen using the tablet function of the computer receives lecturer writing data generated using the recognized information for the lecturer writing contents  3000 . 
     The computer  130  displays the lecturer writing contents  3000  at the student note of Student B on the screen  210  of the computer monitor. Together with this, the computer  130  may generate output data and output the data to the beam projector so that the lecturer writing contents  3000  corresponding to the received lecturer writing data can be displayed on the smart board  150 . At this time, it is possible to control the lecturer writing contents corresponding to the received lecturer writing data in such a manner that the contents can be displayed on the sub-screen (student note) of Student B on the screen  200  formed by projecting beams on the smart board  150 . Of course, it is also possible to control the lecturer writing contents  3000  in such a manner that the contents can be displayed on the entirety of the screen  200  of the smart board  150 . 
     In addition, the computer  150  may generate a single output data by putting the received lecturer writing data together with student writing data received from the student electronic pen  120 , and may output the output data to the beam projector  140 . 
     Examples of transmitting student writing data and lecturer writing data so as to display student writing contents and lecturer writing contents on the smart board were described above. Now, an example of transmitting lecturer writing data for lecturer writing contents directly written on the smart board  150  by a lecturer using a smart board electronic pen  190  will be described with reference to  FIGS. 4 and 5 . 
       FIG. 4  shows an example of transmitting lecturer writing data for lecturer writing contents  4000  directly written on the smart board  150  by a lecturer using a smart board electronic pen  190  in the inventive electronic class system  100 . However, it is assumed that the lecturer writes the lecturer writing contents  4000  on the student note of Student F on the screen  200  of the smart board  150 . 
     In order to transmit the lecturer writing data for the lecturer writing contents  4000  written on the smart board  150  by the lecturer using the smart board electronic pen  190  in this manner, a dot pattern  500  should be printed on the smart board  150  in advance as shown in  FIG. 5 . 
     If the lecturer writes the lecturer writing contents  4000  directly on the smart board  150  using the smart board electronic pen  190 , the smart board electronic pen  190  recognizes the dot pattern  500  at the points where it comes into contact with the smart board  150 , thereby recognizing the lecturer writing contents  4000 , wherein the smart board electronic pen  190  can generate lecture writing data on the basis of the recognized lecture writing contents  4000 . The smart board electronic pen  190  can transmit the lecturer writing data generated in this manner to the computer directly or through an access point  220  with a wireless communication mode. 
     The computer  130  renders the corresponding lecturer writing contents  4000  to be displayed at the student note of Student F on the screen  210  of the computer monitor. 
     The contents displayed on the smart board  150  so as to proceed with class may include lesson contents (lecture contents) displayed by being projected through the computer  130  and the beam projector  140  as well as the lecturer writing contents  4000  directly written by the lecturer using the smart board electronic pen  190 . Here, the class contents displayed by being projected to the smart board  150  may contain at least one of a teaching program content which can be commonly lectured to the entirety of students in one class, one or more teaching program contents which are variously prepared for each of the students in one class according to the grade, progress, level or the like of the students in one class, and contents of teaching materials which are tailored to respective students. 
     In this connection, the computer  130  may store teaching program data which can be lectured commonly to the entirety of students by a lecturer, wherein the data may be inputted by a lecturer to the computer  130  in a predetermined type or may be transmitted to the computer  130  from the server  10 . The computer  130  outputs the stored teaching program data to the beam projector interface, so that the corresponding teaching program contents can be projected to the smart board  150 . On the basis of the teaching program contents projected to and displayed on the smart board  150 , it is possible to proceed with a class. 
     In addition, when students are differentiated from each other in terms of grade, progress, level or the like, the computer  130  may store one or more data which are input in a predetermined type or received from the server  10 , or data for teaching materials tailored to respective students, which are input in a predetermined type or received from the server  10 . The computer may output the one or more data or the data for teaching materials tailored to respective students, so that the data can be projected to the smart board  150 . On the basis of the teaching program contents and the contents of teaching materials tailored to respective students, it is possible to give a class in accordance with the learning level of each of the students. 
     If the students recognize dot books  110 , which are printed with different dot patterns, respectively, with their own student electronic pens  120  during a class, the computer  130  capable of communicating with the student electronic pens  120  may load the one or more corresponding teaching program data or the data for teaching materials tailored to respective students from an internal storage medium or the server  10 , and may output the loaded data to the beam projector interface, so that the loaded data can be projected to the smart board  150 . 
     As described above, according to the present invention, it is possible to provide an electronic class system  100  which enables a digitalized class, wherein breaking from a conventional class method or examination method using paper teaching materials for class and a blackboard for writing class contents, the digitalized class uses electronic pens  120 ,  160  and  190 , each of which is a digitalized writing tool for generating writing data, a computer  130  communicating with the electronic pens to receive the writing data (student writing data or lecturer writing data) generated by the electronic pens, and a smart board which serves as a blackboard on which the writing data (student writing data or lecturer writing data) received by the computer  130  is projected as beams. 
     If the inventive electronic class system  100  is used, student writing contents  2000  and lecturer writing contents can be simultaneously written. As a result, it is possible to give an effective bidirectional active class between students and a lecturer rather than a mono-directional passive class. 
     According to the present invention, it is also possible to provide an electronic class system  100  which allows contents written by a teacher or a student to be automatically displayed on a smart board  150  if the teacher or the student writes the contents using an electronic pen  120 ,  160  or  190 , without the necessity of writing the contents on a blackboard so as to allow all of the students or the teacher to see the contents written by the teacher or the student. 
     According to the present invention, it is also possible to provide an electronic class system  100  capable of automatically transmitting answers to examination questions to a computer  130  of a teacher when a student writes the answers using an electronic pen  120 , even if the student does not submit an examination paper with the answers written by the student. 
     Even if it was described above that all of the components of an embodiment of the present invention are coupled as a single unit or coupled to be operated as a single unit, the present invention is not necessarily limited to such an embodiment. That is, among the components, one or more components may be selectively coupled to be operated as one or more units. In addition, although each of the components may be implemented as an independent hardware, some or all of the components may be selectively combined with each other, so that they can be implemented as a computer program having one or more program modules for executing some or all of the functions combined in one or more hardwares. Codes and code segments forming the computer program can be easily conceived by an ordinarily skilled person in the technical field of the present invention. Such a computer program may implement the embodiments of the present invention by being stored in a computer readable storage medium, and being read and executed by a computer. A magnetic recording medium, an optical recording medium, a carrier wave medium, or the like may be employed as the storage medium. 
     In addition, since terms, such as “including,” “comprising,” and “having” mean that one or more corresponding components may exist unless they are specifically described to the contrary, it shall be construed that one or more other components can be included. All of the terminologies containing one or more technical or scientific terminologies have the same meanings that persons skilled in the art understand ordinarily unless they are not defined otherwise. A term ordinarily used like that defined by a dictionary shall be construed that it has a meaning equal to that in the context of a related description, and shall not be construed in an ideal or excessively formal meaning unless it is clearly defined in the present specification. 
     Although a preferred embodiment of the present invention has been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Therefore, the embodiments disclosed in the present invention are intended to illustrate the scope of the technical idea of the present invention, and the scope of the present invention is not limited by the embodiment. The scope of the present invention shall be construed on the basis of the accompanying claims in such a manner that all of the technical ideas included within the scope equivalent to the claims belong to the present invention.