KR20190010080A - Motion based electronic board and writing method - Google Patents

Abstract

Disclosed are a motion based electronic board system and an electronic board writing method capable of implementing an electronic board system at low costs, providing user convenience, and generating and displaying written information corresponding to written contents of a user. According to an embodiment of the present invention, the motion based electronic board system comprises an electronic pen, a terminal, and a beam projector. The electronic pen includes: a pressure sensor which measures touch pressure for a predetermined written surface; a tilt sensor which measures a tilt for the written surface; an acceleration sensor which measures acceleration for calculating displacement of a written point for the written surface; and a communicating unit which transmits each measuring value of the pressure sensor, the tilt sensor, and the acceleration sensor. The terminal includes: a receiving unit which receives the measuring value from the electronic pen; a displacement calculating unit which calculates displacement of the electronic pen based on the measuring value of the acceleration sensor; and a written information generating unit which generates the written information based on the measuring value of the pressure sensor and the displacement of the electronic pen. The beam projector displays the written information on a screen.

Description

[0001] MOTION BASED ELECTRONIC BOARD AND WRITING METHOD [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motion-based electronic whiteboard system and a writing method, and more particularly, to an electronic whiteboard system and a writing method for displaying writing information based on motion of an electronic pen.

Electronic blackboards are being used to improve the efficiency of education and communication in lecture rooms of educational companies such as elementary, junior high and high schools and universities and private academies, and meeting rooms of companies and the like. Among the conventional electronic blackboards, the method using the infrared LED and infrared camera proposed by Johnny Chung Lee in 2008 requires the user to press the switch to turn on the infrared pen when writing, causing a frequent user input error, There is a limit that can not be written due to short reception distance, infrared blind spot recognition.

In recent years, the demand for advanced smart education has been increasing day by day, and a flat display panel (FDP) integrated electronic board using a liquid crystal display (LCD) panel is spreading. FPD monolithic copyboards are superior in terms of efficiency and convenience. However, due to the limited size of LCD panels, it is difficult to implement a copyboard of 100 inches or more, and the price is rapidly increased to several tens of thousands There is a problem that is difficult to install in all classrooms.

The present invention relates to a motion-based electronic blackboard system capable of realizing an electronic blackboard system at low cost, capable of being used by a user conveniently and efficiently, and capable of generating and displaying writing information that best matches contents of a user's writing, Provides a writing method.

The problems to be solved by the present invention are not limited to the above-mentioned problems. Other technical subjects not mentioned will be apparent to those skilled in the art from the description below.

A motion-based electronic whiteboard system according to an aspect of the present invention includes a pressure sensor for measuring a contact pressure with respect to a predetermined plate surface, a tilt sensor for measuring a slope with respect to the plate surface, An acceleration sensor for measuring an acceleration for calculating a displacement of the acceleration sensor, and a communication unit for transmitting the measured values of the pressure sensor, the tilt sensor and the acceleration sensor; A displacement calculator for calculating a displacement of the electronic pen based on the measured value of the acceleration sensor, and a displacement calculator for calculating a displacement of the electronic pen based on the measured value of the pressure sensor and the displacement of the electronic pen A terminal having a form information generating unit for generating form information; And a beam project for projecting the plan information to a screen and displaying the plan information on the screen.

The displacement calculation unit may calculate the displacement of the electronic pen by double-integrating the acceleration of the electronic pen measured by the acceleration sensor.

The terminal includes a desk bookstore corrector for calculating a displacement of the desk bookstore by correcting a displacement of the electronic pen calculated by the displacement calculator based on tilt information of the electronic pen measured by the tilt sensor .

The pen writing information generating unit may generate pen writing information to be displayed on the edition writing surface by synchronizing the displacement of the edition bookstore with a mouse pointer on the edition writing surface.

The terminal may further include a pressure conversion unit for calculating a pressure level of the electronic pen based on the measured value of the pressure sensor and determining a thickness of a line to be displayed on the surface of the electronic pen.

The terminal further includes a motion recognition unit for recognizing the motion of the electronic pen based on the measured values of the acceleration sensor and the tilt sensor and for determining whether the motion of the electronic pen matches a predetermined pattern , The pen writing information generating unit may generate the pen writing information by performing an operation corresponding to the preset pattern when the motion of the electronic pen matches the predetermined pattern.

Wherein when the motion of the electronic pen is a pattern shaking while the motion of the electronic pen is horizontal with respect to the plate writing surface, the writing information generating unit performs a full erasing operation of erasing the writing information displayed on the plate writing surface, When the motion of the pen is a pattern reversing the electronic pen, it is possible to perform a partial erasing operation for erasing the written information displayed on the edition surface of the electronic pen.

The electronic pen may determine whether the electronic pen is in contact with the printed surface based on a measured value of the pressure sensor, and may switch to a mouse operation mode when the electronic pen is not in contact with the printed surface.

The terminal may further include a calibration unit for correcting a displacement error of the edition bookstore to solve an error accumulation of the acceleration sensor.

Wherein the calibration unit compares at least one calibration point on a predetermined displacement coordinate on the plate surface and compares the displacement of the plate bookmark measured when the electronic pen contacts the calibration point with the predetermined displacement coordinate, The displacement error of the edition bookstore can be corrected.

Wherein the calibration unit is configured to cause at least two calibration points to be displayed on the written surface and to calculate displacement information of the electronic pen measured at respective distances between the calibration points and contact points with the calibration points, The displacement error of the edition bookstore can be corrected based on the inclination information of the electronic pen at the points of contact with the points.

According to another aspect of the present invention, there is provided an information processing apparatus comprising: a receiving unit for receiving information on contact pressure of an electronic pen with respect to a plate surface, inclination information of the electronic pen with respect to the plate surface, and acceleration information of the electronic pen; A displacement calculating unit for calculating a displacement of the electronic pen based on the acceleration information of the electronic pen; And a writing information generating unit for generating writing information based on the contact pressure information of the electronic pen and the displacement of the electronic pen.

According to another aspect of the present invention, there is provided a pressure sensor comprising: a pressure sensor for measuring a contact pressure with respect to a predetermined plate surface; A tilt sensor for measuring a tilt with respect to the plate surface; An acceleration sensor for measuring an acceleration for calculating a displacement of the plate bookstore relative to the plate surface; And a communication unit for grouping and transmitting measured values of the pressure sensor, the tilt sensor, and the acceleration sensor.

The electronic pen may determine whether the electronic pen is in contact with the printed surface based on the measured value of the pressure sensor, and may switch to a mouse operation mode when the electronic pen is not in contact with the printed surface.

According to another aspect of the present invention, there is provided a method of measuring a contact pressure, comprising: measuring contact pressure at which an electronic pen contacts a predetermined plate surface; Measuring a slope of the electronic pen with respect to the plate surface; Measuring an acceleration of the electronic pen; Calculating a displacement of the electronic pen based on the acceleration information of the electronic pen; Generating pen writing information based on the contact pressure of the pen and the displacement of the pen; And projecting the written information on a screen to display the written information on the screen.

The motion-based electronic board writing method may include calculating displacement of the edition bookstore by correcting a displacement of the electronic pen based on inclination information of the electronic pen; Calculating a pressure level of the electronic pen based on the contact pressure of the electronic pen, and determining a thickness of a line to be displayed on the tablet surface; And a step of recognizing the motion of the electronic pen based on the inclination information and the acceleration information of the electronic pen and determining whether the motion of the electronic pen matches a preset pattern, , The step of synchronizing the displacement of the edition bookstore with the mouse pointer on the edition surface and performing an operation set corresponding to the predetermined pattern when the motion of the electronic pen meets the preset pattern, Can be generated.

According to the embodiments of the present invention, it is possible to provide a motion-based electronic blackboard system capable of implementing an electronic blackboard system at low cost, using the electronic bookboard conveniently, and generating and displaying written information conforming to the contents of the user's writing, An electronic board writing method is provided.

The effects of the present invention are not limited to the effects described above. Unless stated, the effects will be apparent to those skilled in the art from the description and the accompanying drawings.

1 is a block diagram of a motion-based electronic whiteboard system according to an embodiment of the present invention.
2 is a flowchart of a motion-based electronic whiteboard writing method according to an embodiment of the present invention.
3 is a configuration diagram of an electronic pen constituting a motion-based electronic whiteboard system according to an embodiment of the present invention.
4 is an exemplary diagram of a packet transmitted from an electronic pen to a terminal according to an embodiment of the present invention.
5 is a block diagram of a control module constituting a motion-based electronic whiteboard system according to an embodiment of the present invention.
6 is a diagram for explaining a method of calculating the displacement of the edition bookstore by correcting the displacement of the electronic pen according to the embodiment of the present invention.
7 is a block diagram of a control module constituting a motion-based electronic whiteboard system according to another embodiment of the present invention.
8 to 11 are views for explaining the operation of the calibration unit constituting the motion-based electronic whiteboard system according to the embodiment of the present invention.
12 is a block diagram of a motion-based electronic whiteboard system according to another embodiment of the present invention.

Other advantages and features of the present invention and methods of achieving them will be apparent by referring to the embodiments described hereinafter in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and the present invention is only defined by the scope of the claims. Although not defined, all terms (including technical or scientific terms) used herein have the same meaning as commonly accepted by the generic art in the prior art to which this invention belongs.

A general description of known configurations may be omitted so as not to obscure the gist of the present invention. In the drawings of the present invention, the same reference numerals are used as many as possible for the same or corresponding configurations. To facilitate understanding of the present invention, some configurations in the figures may be shown somewhat exaggerated or reduced.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises", "having", or "having" are intended to specify the presence of stated features, integers, steps, operations, components, Steps, operations, elements, parts, or combinations thereof, whether or not explicitly described or implied by the accompanying claims.

Used throughout this specification may refer to a hardware component such as, for example, software, FPGA or ASIC, as a unit for processing at least one function or operation. However, "to" is not meant to be limited to software or hardware. &Quot; to " may be configured to reside on an addressable storage medium and may be configured to play one or more processors.

As an example, the term '~' includes components such as software components, object-oriented software components, class components and task components, and processes, functions, attributes, procedures, Routines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functions provided by the components and components may be performed separately by a plurality of components and components, or may be integrated with other additional components.

1 is a block diagram of a motion-based electronic whiteboard system according to an embodiment of the present invention. 1, a motion-based electronic whiteboard system 100 according to the present embodiment includes a terminal 110, an electronic pen 120, and a beam projector 150.

In one embodiment, the terminal 110 may be a terminal of a user who performs writing for purposes of education, meeting, presentation, etc., such as a university professor, a primary / middle / high school teacher, a school lecturer, an employee of an enterprise or a public official of a public office .

The terminal 110 may be, for example, a tablet PC, a notebook computer, a smart phone, a personal digital assistant (PDA), a desktop computer, or the like, but is not limited thereto.

The terminal 110 can receive the data from the electronic pen 120 and generate the writing information and transmit the created writing information to the terminal 140 provided in the class room or the conference room.

The electronic pen 120 may be provided for the user to make a handwriting on the screen of the terminal 110 of the terminal 110, for example, on the screen of the terminal 110. [ A touch panel for detecting the contact position of the electronic pen 120 is provided to the terminal 110 because the process for generating the pen information is performed based on the motion of the electronic pen 120. [ The pen writing information inputted by the user using the electronic pen 120 is written on the printed surface 112 of the terminal 110 and on the screen 160, Can be displayed.

The writing information displayed on the writing surface 112 is for allowing the user (writer) to view the writing content through his / her terminal 110, and the writing information displayed on the screen 160 is for the students, This is to allow attendees to see the content of the written statement entered by the plaintiff.

The terminal 110 may include a control board 130 that performs operations to display the board information on the board surface 112 and the screen 160. The electronic pen 120 can measure the contact pressure with respect to the plate surface 112 and the tilt and acceleration information of the electronic pen 120 with respect to the plate surface 112 in real time Can be provided.

The electronic pen 120 may be programmed to determine the contact pressure to the measured planar surface 112, the tilt to the planar surface 112, and the acceleration information To the control module (130) of the terminal (110). The control module 130 generates draft information on the basis of the contact pressure, inclination, and acceleration information of the electronic pen 120 transmitted from the electronic pen 120 and displays it on the edition surface 112, And transmits it to the terminal 140 provided. The written information transmitted to the terminal 140 is projected onto the screen 160 by the beam projector 150. Accordingly, users who attend the lecture or attend the meeting can view the dissertation information through the screen 160. [

2 is a flowchart of a motion-based electronic whiteboard writing method according to an embodiment of the present invention. 1 and 2, when the writer starts writing on the writing surface 112 using the electronic pen 120, the electronic pen 120 is placed on the writing surface 112 of the electronic pen 120, (S20), and the contact pressure value, the acceleration, and the tilt information are measured. The contact pressure value, acceleration, and tilt information of the measured electronic pen 120 with respect to the plate surface 112 are wirelessly transmitted to the terminal 110 (S30).

The terminal 110 calculates the position of a bookstore point on the edition surface 112 (the point at which the electronic pen contacts the edition surface) using the acceleration and tilt information of the electronic pen 120 transmitted from the electronic pen 120, And converts the contact pressure value of the pen 120 to the plate writing surface 112 into a writing pressure to generate writing information (S40 to S50).

The terminal 110 outputs the created form information to a screen (edition), and transmits the information to the terminal 140 such as a lecture room or a conference room (S60). The beam project 150 connected to a terminal such as a lecture room projects project information received from the terminal 110 onto the screen 160 to display the program information on the screen 160 at step S70.

3 is a configuration diagram of an electronic pen constituting a motion-based electronic whiteboard system according to an embodiment of the present invention. 3, the electronic pen 120 includes a case 121, a pressure sensor 122, an acceleration sensor 123, a tilt sensor 124, a control unit 125, a communication unit 126, a battery 127, And a button unit 128, as shown in FIG.

The case 121 may be provided in the form of a pen so that a user can easily make a handwriting. The pressure sensor 122, the acceleration sensor 123, the tilt sensor 124, the control unit 125, the communication unit 126 and the battery 127 are incorporated in the case 121, And may be provided on the side surface of the case 121 so as to be able to input buttons.

The pressure sensor 122 measures the contact pressure against the plate surface 112. The pressure sensor 122 may be provided at the tip of the electronic pen 120 to accurately measure the contact pressure of the electronic pen 120 with respect to the plate surface 112. [ In one embodiment, the pressure sensor 122 may be provided as a piezo element that outputs an electrical signal in response to a pressure, but is not limited thereto.

The acceleration sensor 123 measures the acceleration for calculating the displacement of the plate bookstore with respect to the plate surface of the electronic pen 120. [ In one embodiment, the acceleration sensor 123 may measure the three-axis acceleration information of the electronic pen 120. [

The tilt sensor 124 measures the tilt of the electronic pen 120 with respect to the plate surface 112. In one embodiment, the acceleration sensor 123 and the tilt sensor 124 may be integrated into a gyro sensor. The gyro sensor may be provided as a gyro sensor such as a 6-axis or 9-axis.

The control unit 125 collects data from the pressure sensor 122, the acceleration sensor 123, and the tilt sensor 124, and bundles the measurement values collected at the same time in a predetermined format to generate a packet. The control unit 125 may be provided as at least one processor.

The control unit 125 determines whether or not the electronic pen 120 is in contact with the plate surface 112 based on the measured value of the pressure sensor 120. If the electronic pen 120 is in contact with the plate surface 112 And transmits the generated packet to the terminal 110. [

If the inclination and the acceleration of the electronic pen 120 do not change even when the electronic pen 120 is in contact with the printed circuit board 112, the control unit 125 may not perform packet generation and transmission have.

By transmitting a packet to the terminal 110 only when it is determined that the pen information is updated by the electronic pen 120, power consumption of the electronic pen 120, which may be caused by unnecessary data transmission, is reduced, 127 can be increased.

The communication unit 126 wirelessly transmits the packet generated by the control unit 125 to the control module 130 of the terminal 110. The communication unit 126 may be provided as a Bluetooth module in consideration of convenience of connection, communication distance, data transmission speed, power management, and the like, but is not limited thereto.

4 is an exemplary diagram of a packet transmitted from an electronic pen to a terminal according to an embodiment of the present invention. 3 and 4, the packet includes a contact pressure value (pressure information), a gyro sensor value (inclination information), an acceleration sensor value (acceleration information), an input value of physical buttons And the like can be included in a predetermined format.

3, a battery 127 is provided for supplying power for operation of the electronic pen 120. [ The battery 127 may be provided in a rechargeable or replaceable manner.

The button unit 128 may include various physical buttons. The button unit 128 may include left and right click buttons of a mouse, a wheel unit, and the like so that the electronic pen 120 can perform a mouse function while the electronic pen 120 does not perform a pen. Also, as will be described later, a button for switching the electronic pen 120 to a calibration mode or the like may be provided.

5 is a block diagram of a control module constituting a motion-based electronic whiteboard system according to an embodiment of the present invention. 5, the control module 130 includes a reception unit 131, a displacement calculation unit 132, a bookshop point correction unit 133, a pressure conversion unit 134, a motion recognition unit 135, An input unit 136, an output unit 137, and a transmission unit 138.

1, 3 and 5, the receiving unit 131 receives measurement values wirelessly transmitted from the electronic pen 120. [ The receiving unit 131 may be provided as a wireless communication module (for example, a Bluetooth module).

When the measured values of the electronic pen 120 are transmitted in packets, the control module 130 parses the measured values of the electronic pen 120 in the received packet, , The inclination of the electronic pen 120, and the acceleration information.

The displacement calculating unit 132 calculates the displacement of the electronic pen 120 based on the measured value of the acceleration sensor 123. [ Strictly speaking, the displacement of the electronic pen 120 means the displacement of the acceleration sensor 123.

The displacement calculating unit 132 integrates the acceleration of the electronic pen 120 measured by the acceleration sensor 123 in each axis direction in a time integral manner to calculate a three dimensional displacement of the electronic pen 120, Calculate distance and travel direction.

The displacement of the electronic pen 120 calculated by the displacement calculation section 132 may not accurately reflect the edition bookstore in which the electronic pen 120 actually makes contact with the edition writing surface 112. [ The displacement of the electronic pen 120 is calculated on the basis of the measurement value of the acceleration sensor 123 and the acceleration sensor 123 is not accurately positioned at the book shelf where the electronic pen 120 performs writing, The displacement of the electronic pen 120 has an error with respect to the displacement of the plate bookstore according to the inclination of the electronic pen 120. [

The displacement of the acceleration sensor 123 can be made to coincide with the displacement of the plate bookstore when the acceleration sensor 123 is mounted on the distal end of the electronic pen 120. However, It is difficult to attach the acceleration sensor 123 to the tip of the electronic pen 120 because the pressure sensor 122 is provided at the tip of the electronic pen 120 to accurately measure the pressure.

It is necessary to accurately calculate the displacement of the edition bookstore by correcting the displacement of the electronic pen 120 in order to display the edition information more in accordance with the user's edition. For this purpose, the plate book corrector 133 sets the measured value of the acceleration sensor 123 by the displacement calculator 132 based on the tilt information of the electronic pen 120 measured by the tilt sensor 124 And calculates the displacement of the edition bookstore by correcting the calculated displacement of the electronic pen 120. [

6 is a diagram for explaining a method of calculating the displacement of the edition bookstore by correcting the displacement of the electronic pen according to the embodiment of the present invention. 1, 3 and 6, the figure book correction unit 133 corrects the inclination information (?) Of the electronic pen 120 measured by the tilt sensor 124 of the electronic pen 120, The displacement of the acceleration sensor 123 is corrected based on the distance L between the front end 123 of the electronic pen 120 and the front end of the electronic pen 120 to calculate the displacement of the book shelf WP.

That is, the plate book store correction unit 133 corrects the displacement amount of the electronic pen 120 calculated on the basis of the measurement value of the acceleration sensor 123 by L x cos? In the X axis direction and the Y axis direction, Can be calculated. Therefore, the displacement of the plate bookstore WP is accurately calculated in consideration of the inclination [theta] of the electronic pen 120, and the board information that more closely matches the content of the user's writing is displayed on the edition plane 112 and the screen 160 .

The pressure conversion unit 134 calculates the pressure level of the electronic pen 120 on the basis of the measured value of the pressure sensor 122 and displays it on the printed surface 112 and the screen 160 by the electronic pen 120 Determine the thickness of the line. For example, as the measured value of the pressure sensor 122 is increased, a higher pressure level is calculated and displayed as a thick line. Accordingly, the user can conveniently adjust the thickness of the lines to be written by adjusting the pressing force of the electronic paper 120 on the paper surface 112. [

At this time, even if the user presses the electronic pen 120 with the same force, the measured value of the pressure sensor 122 changes in accordance with the inclination of the electronic pen 120, The writing information can be generated in such a manner that the thickness of the line changes according to the slope of the writing information.

In order to prevent such a problem, the pressure conversion unit 134 can determine the pressure level by considering the measured value of the pressure sensor 122 and the inclination of the electronic pen 120 together. For example, a higher scale is applied to the measured value of the pressure sensor 122 as the electronic pen 120 is more tilted to the plate surface, and in the opposite case, the measured value of the pressure sensor 122 is relatively lower The scale can be applied to determine the pressure level.

Therefore, even if the inclination of the electronic pen 120 changes unintentionally in the user's writing process and the measured value of the pressure sensor 122 fluctuates, the measured value of the pressure sensor 122 in accordance with the inclination change of the electronic pen 120 The scale value to be applied to the scale can be changed to determine a constant level of the pressure level, and it is possible to prevent the thickness of the line from fluctuating in the process of writing.

The motion recognition unit 135 recognizes the motion of the electronic pen 120 based on the measured values of the acceleration sensor 123 and the tilt sensor 124 of the electronic pen 120, It is determined whether or not at least one of the set patterns is satisfied.

The motion recognition unit 135 can determine whether the motion of the electronic pen 120 is a pattern shaking in a state where the motion of the electronic pen 120 is horizontal with respect to the plate surface or whether it is a pattern for reversing the electronic pen 120 or the like.

The motion recognizing unit 135 recognizes that the inclination of the electronic pen 120 is within an error range set from 0 DEG with respect to the plate surface and that the electronic pen 120 is in a state in which when the acceleration of the electronic pen 120 changes by a predetermined level or more, Can be recognized as a pattern that is shaken in a state in which the motion of the paper is horizontal with the plate surface. As another example, when the inclination of the electronic pen 120 changes by a predetermined angle or more, the motion recognition unit 135 can recognize that the electronic pen 120 is a reversing pattern.

The writing information generating unit 136 generates the writing information of the terminal 110 based on the information provided from the displacement calculating unit 132, the edition book correction unit 133, the pressure conversion unit 134 and the motion recognition unit 135, And writer information to be displayed on the screen 160.

The writing information generating unit 136 may calculate the writing information of the electronic pen 120 based on the measured value of the pressure sensor 122 and the measured value of the acceleration sensor 123 by the displacement calculating unit 132. In other words, It is possible to generate writing information based on the displacement. The writing information generating unit 136 may generate writing information to be displayed on the writing face 112 by synchronizing the displacement of the book reading point WP with the mouse pointer on the writing face 112. [

The writing information generating unit 136 determines whether the electronic pen 120 is in contact with the tablet writing surface 112 based on the measurement value of the pressure sensor 122 and judges whether the electronic pen 120 is in contact with the tablet writing surface 112, The bookbinding information is added to the position of the book shelf WP calculated by the displacement calculating unit 132 and the book shelf book correcting unit 133 according to the procedure described above. At this time, the thickness of the line printed on the screen surface of the terminal 110 and the screen 160 may be determined according to the level of the pressure calculated by the pressure conversion unit 134.

When it is determined that the electronic pen 120 is not in contact with the edition writing surface 112, the edition information generation section 136 does not add edition information to the position of the edition book store. In this case, the electronic pen 120 operates in a mouse operation mode, and even when the electronic pen 120 is not in contact with the printed surface 112, even if the electronic pen 120 is moved, 112 and the script information displayed on the screen 160 will not be changed.

A function of determining whether the electronic pen 120 is in contact with the plate surface based on the measured value of the pressure sensor 122 and switching the electronic pen 120 to the mouse operation mode in a state where the electronic pen 120 is not in contact with the plate surface Program) may be configured to be executed by the control unit 125 of the electronic pen 120. [

When the motion recognition unit 135 determines that the motion of the electronic pen 120 matches at least one of predetermined patterns, the writing information generation unit 136 performs an operation set corresponding to the preset pattern It is possible to generate writing information. The predetermined pattern may include, for example, operations such as a full erase operation, a partial erase operation, and the like.

When the motion of the electronic pen 120 is shaken while the motion of the electronic pen 120 is horizontal with respect to the edition writing face 112, the edition information generating portion 136 writes the entire edition information displayed on the edition face 112 on the edition face 112, And performs a partial erasing operation to erase the writing information corresponding to the movement path of the electronic pen 120 among the writing information on the writing surface 112 when the electronic pen 120 is reversed .

The output unit 137 displays the form information generated by the form information generating unit 136 on the edition plane 112 of the terminal 110. The transmitting unit 138 can transmit the writing information generated by the writing information generating unit 136 to a terminal (140 in FIG. 1) provided in a class room, a conference room, or the like via wired / wireless communication. The signer information transmitted to the terminal 140 may be projected and displayed on the screen 160 by the beam projector 150.

Since the motion-based electronic whiteboard system according to the embodiment of the present invention as described above performs the writing operation based on the motion of the electronic pen 120, it is possible to use an expensive flat display (FDP) or an infrared LED device It is possible to implement the electronic board at a much lower cost than in the case of using it. In addition, while the electronic blackboard system is implemented on the basis of the motion of the electronic pen 120, it is possible to generate and display the pen writing information that exactly matches the pen writing contents of the user, and the user can input the pen writing information conveniently.

In the modified embodiment of the present invention, the displacement calculation section 132, the edition book point correction section 133, the pressure-pressure conversion section 134, the motion recognition section 135 and the writing information generation section 136 of the control module 130 May be provided in the electronic pen 120. [ In this case, the operation information and / or the edition information set in correspondence with the displacement information of the electronic pen 120, the displacement information of the edition book, the pressure information, the motion information or the motion information from the electronic pen 120, Or a terminal 140 provided in a classroom or a conference room.

7 is a block diagram of a control module constituting a motion-based electronic whiteboard system according to another embodiment of the present invention. In the description of the embodiment of FIG. 7, duplicate descriptions of the same or corresponding components to those of the previously described embodiment will be omitted. The embodiment of FIG. 7 differs from the above-described embodiment in that the control module 130 further includes a calibration section 139. FIG.

The calibration section 139 is provided for correcting the displacement error of the edition bookstore to solve the error accumulation of the acceleration sensor 123. [ When the error of the acceleration sensor 123 is accumulated, the position of the edition bookstore pointed by the electronic pen 120 and the position of the edition information displayed on the edition face can be increased. In this case, when the user requests switching to the calibration mode by using the button portion 128 of the electronic pen 120, the calibration portion 139 performs a calibration mode for eliminating the displacement error of the plate bookstore .

8 to 11 are views for explaining the operation of the calibration unit constituting the motion-based electronic whiteboard system according to the embodiment of the present invention. 8, the calibration unit 139 displays one or more calibration points CP1 and CP2 on the plate surface 112 of the terminal 110. As shown in FIG.

In the example of Fig. 8, the two calibration points CP1 and CP2 are displayed on the plate surface 112 of the preset displacement coordinates. The horizontal direction of the terminal 110 is referred to as a first direction (X), and the vertical direction is referred to as a second direction (Y). The coordinates of the calibration points CP1 and CP2 are set such that the values of the X and Y axes are different from each other so that the cumulative displacement error of the plate bookstore can be simultaneously canceled in the first direction X and the second direction Y .

When the calibration points CP1 and CP2 are displayed on the plate surface 112, the user sequentially inputs calibration points CP1 and CP2 to the electronic pen 120 )do. The calibration unit 139 compares the displacement of the plate bookstore calculated when the electronic pen 120 is brought into contact with the calibration points CP1 and CP2 and the displacement coordinates of the calibration points CP1 and CP2, Correct the displacement error of the bookstore.

The movement distance of the electronic pen 120 calculated by the double integration of the acceleration sensor 123 may have a movement distance and an error of the actual electronic pen 120. The displacement error of the plate book (139).

11, the calibration unit 139 calculates the movement distance of the electronic pen 120 calculated by the double integration of the acceleration sensor 123 (the displacement information of the electronic pen measured at the contact points with the calibration points, ), and a calibration dots (CP1, CP2), the distance (Dx), the calibration dots (CP1, CP2), the slope information of the stylus 120 at the contact point (θ _1, θ ₂₎ of between the base , The displacement error of the plate bookstore can be corrected.

The distance Dx between the calibration points CP1 and CP2 is set to Lxcos? (?) Between the calibration points CP1 and CP2 in order to carry out the calibration in consideration of the difference of the tilt information when the electronic pen 120 contacts the two calibration points CP1 and CP2. ₁ and subtracts ₁ from the actual moving distance D ₁ of the acceleration sensor 123 by adding the L × cos θ ₂ value.

The displacement error of the electronic pen 120 is calculated by comparing the moving distance of the electronic pen 120 obtained by double integration of the measured value of the acceleration sensor 123 and the actual moving distance D ₁ of the acceleration sensor 123 . Therefore, by applying the calibration value for the displacement error of the electronic pen 120, the displacement of the edition bookstore calculated by the control module at the time of switching to the pen mode is detected by the actual electronic pen 120, . ≪ / RTI >

The error of the tilt sensor 124 may also affect the accuracy of the writing information. Accordingly, the calibration unit 139 may perform calibration for the tilt sensor 124. [ For example, the calibration unit 139 may output a message such as " Place the electronic pen vertically on the screen " on the screen of the terminal 110. [ Accordingly, if the user vertically arranges the electronic pen 120 on the screen of the terminal 110, the measured value of the tilt sensor 124 at that time is compared with 90 degrees, and calibration is performed by the difference value.

Then, the calibration unit 139 can output a message such as " Place the electronic pen on the screen in the horizontal direction (or the vertical direction) in parallel " on the screen of the terminal 110. [ Accordingly, when the user places the electronic pen 120 in parallel with the screen of the terminal 110, the measurement value of the tilt sensor 124 at that time is compared with 0 °, and calibration is performed by the difference value.

Therefore, according to the present embodiment, the calibration for eliminating the cumulative error of the acceleration sensor 123 and the tilt sensor 124 of the electronic pen 120 can be efficiently and conveniently performed, and the movement of the electronic pen 120 Distance and direction of movement, displacement of a bookstore, and the like, and by creating and displaying writing information more in accordance with the contents of the user's writing, the effect of education and meeting can be improved.

8 to 11 illustrate an example of performing calibration using two calibration points CP1 and CP2. However, in the case of correcting only the current position of a bookstore, calibration may be performed using one calibration point And more than three calibration points may be used to perform a calibration with a higher accuracy.

In the modified embodiment of the present invention, the displacement calculation unit 132, the edition book point correction unit 133, the pressure conversion unit 134, the motion recognition unit 135, the writing information generation unit 136 And the calibration unit 139 may be provided in the electronic pen 120. [ In this case, the operation information, the calibration information, and / or the edition information set in association with the displacement information of the electronic pen 120, the displacement information of the edition book, the pressure information, the motion information or the motion information from the electronic pen 120, (110) or a terminal (140) provided in a lecture room or a conference room.

12 is a block diagram of a motion-based electronic whiteboard system according to another embodiment of the present invention. In the description of the embodiment of FIG. 12, duplicate descriptions of the same or corresponding components as those of the above-described embodiments will be omitted. In the embodiment of FIG. 12, the electronic pen 120 directly writes on the screen 160 instead of the screen of the terminal, and the control module 130 is not a terminal of the user but a terminal 140 provided in a class room or a conference room And is different from the above-described embodiment in that it is provided.

In such a case, the screen 160 corresponds to the above-described edition writing surface. The information measured by the electronic pen 120 is transmitted to the terminal 140 provided in the lecture room or the conference room rather than the individual terminal of the presenter, and the process of transmitting the presenter information from the presenter's personal terminal to the terminal 140 is omitted . The method for generating the writing information using the electronic pen 120 and the control module 130 may be the same as the embodiment described above.

However, in the case of performing the calibration mode, the beam project 150 is projected so that the calibration points CP3 and CP4 are displayed at predetermined coordinate positions on the screen 160. In this regard, There is a difference. Also, in this embodiment, the message for the calibration of the acceleration sensor 123 and the tilt sensor 124 of the electronic pen 120 is also projected on the screen 160, not the personal terminal of the presenter. The calibration process after the calibration points CP3, CP4 or the guidance message for calibration is displayed on the screen 160 may be performed in the same manner as the above-described embodiment.

The method according to an embodiment of the present invention can be realized in a general-purpose digital computer that can be created as a program that can be executed by a computer and operates the program using a computer-readable recording medium. The computer readable recording medium may be a volatile memory such as SRAM (Static RAM), DRAM (Dynamic RAM), SDRAM (Synchronous DRAM), ROM (Read Only Memory), PROM (Programmable ROM), EPROM (Electrically Programmable ROM) Non-volatile memory such as EEPROM (Electrically Erasable and Programmable ROM), flash memory device, Phase-change RAM (PRAM), Magnetic RAM (MRAM), Resistive RAM (RRAM), Ferroelectric RAM But are not limited to, optical storage media such as CD ROMs, DVDs, and the like.

It is to be understood that the above-described embodiments are provided to facilitate understanding of the present invention, and do not limit the scope of the present invention, and it is to be understood that various modified embodiments are also within the scope of the present invention. It is to be understood that the technical scope of the present invention should be determined by the technical idea of the claims and the technical scope of protection of the present invention is not limited to the literary description of the claims, Of the invention.

100: Motion-based electronic board system
110: terminal
112:
120: Electronic pen
121: Case
122: Pressure sensor
123: Accelerometer
124: tilt sensor
125:
126:
127: Battery
128: button portion
130: control module
131: Receiver
132: Displacement calculation unit
133: Bookstore repair station
134:
135: Motion recognition unit
136:
137: Output section
138:
139: Calibration part
140:
150: Beam projector
160: Screen

Claims (22)

An acceleration sensor for measuring an acceleration for calculating a displacement of a plate bookstore with respect to the plate surface; and an acceleration sensor for measuring an acceleration for calculating a displacement of the plate book surface with respect to the plate surface, An electronic pen having a pressure sensor, a tilt sensor, and a communication unit for transmitting respective measured values of the acceleration sensor;
A displacement calculator for calculating a displacement of the electronic pen based on the measured value of the acceleration sensor, and a displacement calculator for calculating a displacement of the electronic pen based on the measured value of the pressure sensor and the displacement of the electronic pen A terminal having a form information generating unit for generating form information; And
And a beam project for projecting the written information on a screen and displaying the written information on the screen. The method according to claim 1,
Wherein the displacement calculator calculates the displacement of the electronic pen by double-integrating the acceleration of the electronic pen measured by the acceleration sensor. 3. The method of claim 2,
The terminal comprises:
And a plate bookstore correcting unit for correcting displacement of the electronic pen calculated by the displacement calculating unit based on the inclination information of the electronic pen measured by the tilt sensor to calculate a displacement of the edition bookstore Based electronic board system. The method of claim 3,
And the pen writing information generating unit generates pen writing information to be displayed on the pen writing surface by synchronizing a displacement of the pen bookstore with a mouse pointer on the pen writing surface. The method according to claim 1,
The terminal comprises:
And a pressure conversion unit for calculating a pressure level of the electronic pen based on the measured value of the pressure sensor and determining the thickness of the line of the written information to be displayed on the printed surface. The method according to claim 1,
The terminal comprises:
And a motion recognition unit for recognizing the motion of the electronic pen based on the measured values of the acceleration sensor and the tilt sensor and for determining whether the motion of the electronic pen matches a predetermined pattern,
Wherein the writing information generating unit generates the writing information by performing an operation corresponding to the predetermined pattern when the motion of the electronic pen matches the preset pattern. The method according to claim 6,
Wherein the writing information generating unit comprises:
When the motion of the electronic pen is a pattern shaking in a state where the motion of the electronic pen is horizontal with respect to the plate writing surface, performing a full erasing operation of erasing the writing information displayed on the plate writing surface,
A motion-based electronic blackboard for performing a partial erasing operation for erasing writing information corresponding to a moving path of the electronic pen among the writing information displayed on the edition surface when the motion of the electronic pen is a reversing pattern of the electronic pen system. The method according to claim 1,
Wherein the electronic pen determines whether the electronic pen is in contact with the plate writing surface based on a measurement value of the pressure sensor and switches to a mouse operation mode when the plate is not in contact with the plate writing surface, system. The method according to claim 1,
The terminal comprises:
And a calibration unit for correcting a displacement error of the edition bookstore to eliminate an error accumulation of the acceleration sensor. 10. The method of claim 9,
The calibration unit includes:
Wherein at least one calibration point is displayed on a predetermined displacement coordinate on the plate writing surface and a displacement of the plate bookstore measured when the electronic pen contacts the calibration point is compared with the predetermined displacement coordinate, Motion - based electronic board system that corrects errors. 11. The method of claim 10,
The calibration unit includes:
Wherein at least two calibration points are displayed on the written surface, displacement information of the electronic pen measured respectively at the points of contact between the calibration points and the points of contact with the calibration points, Based on the tilt information of the electronic pen at contact points, corrects a displacement error of the edition bookstore. A receiving unit for receiving the contact pressure information of the electronic pen with respect to the plate surface, the inclination information of the electronic pen with respect to the plate surface, and the acceleration information of the electronic pen;
A displacement calculating unit for calculating a displacement of the electronic pen based on the acceleration information of the electronic pen; And
And a writing information generating unit for generating writing information based on the contact pressure information of the electronic pen and the displacement of the electronic pen. 13. The method of claim 12,
Wherein the displacement calculating unit calculates the displacement of the electronic pen by double-integrating the acceleration information of the electronic pen. 14. The method of claim 13,
And a plate bookstore correcting unit for correcting the displacement of the electronic pen calculated by the displacement calculating unit based on the inclination information of the electronic pen to calculate a displacement of the plate bookstore. 15. The method of claim 14,
Wherein the writing information generating unit generates writing information to be displayed on the edition face by synchronizing the displacement of the book reading point with a mouse pointer on the edition face. 13. The method of claim 12,
And a pressure conversion unit for calculating a pressure level of the electronic pen based on the contact pressure information of the electronic pen and determining a thickness of the line of the pen information to be displayed on the surface of the pen. 13. The method of claim 12,
And a motion recognition unit for recognizing the motion of the electronic pen based on the acceleration information and the slope information of the electronic pen and determining whether the motion of the electronic pen matches the predetermined pattern,
Wherein the writing information generating unit generates the writing information by performing an operation set corresponding to the predetermined pattern when the motion of the electronic pen matches the preset pattern. 15. The method of claim 14,
Wherein at least one calibration point is displayed on a predetermined displacement coordinate on the plate writing surface and a displacement of the plate bookstore measured when the electronic pen contacts the calibration point is compared with the predetermined displacement coordinate, And a calibration unit for correcting the error. A pressure sensor for measuring a contact pressure with respect to a predetermined plate surface;
A tilt sensor for measuring a tilt with respect to the plate surface;
An acceleration sensor for measuring an acceleration for calculating a displacement of the plate bookstore relative to the plate surface; And
And a communication unit for grouping and transmitting measured values of the pressure sensor, the tilt sensor, and the acceleration sensor. 20. The method of claim 19,
Wherein the electronic pen determines whether or not the electronic pen is in contact with the plate writing surface based on the measured value of the pressure sensor and switches to the mouse operation mode when the plate is not in contact with the plate writing surface. Measuring a contact pressure at which the electronic pen is in contact with a predetermined plate surface;
Measuring a slope of the electronic pen with respect to the plate surface;
Measuring an acceleration of the electronic pen;
Calculating a displacement of the electronic pen based on the acceleration information of the electronic pen;
Generating pen writing information based on the contact pressure of the pen and the displacement of the pen; And
And projecting the written information on a screen to display the written information on the screen. 22. The method of claim 21,
Calculating displacements of the edition bookstore by correcting displacement of the electronic pen based on inclination information of the electronic pen;
Calculating a pressure level of the electronic pen based on the contact pressure of the electronic pen and determining a thickness of the line of the pen information to be displayed on the surface of the plate; And
Recognizing the motion of the electronic pen based on the inclination information and the acceleration information of the electronic pen and determining whether or not the motion of the electronic pen matches a predetermined pattern,
Wherein the step of generating the writing information comprises:
Wherein the controller is configured to synchronize the displacement of the edition bookstore with a mouse pointer on the edition surface to generate the publication information and to perform an operation corresponding to the predetermined pattern when the movement of the electronic pen matches the predetermined pattern, A motion - based electronic paperboard writing method for generating information.

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