JP7429831B2 - Electronic blackboard using multi-electronic pens - Google Patents

Description

The present disclosure relates to an electronic blackboard that utilizes multi-electronic pens, and more particularly, to an electronic blackboard that can recognize the position of writing on the electronic blackboard using a multi-electronic pen with a position identification function.

Unless otherwise indicated herein, nothing described in this section is prior art to the claims of this application and is not admitted to be prior art for inclusion in this section.

In the past, in schools and workplaces, writing was done on a blackboard using chalk or board markers to teach specific content or share ideas with each other. However, chalk powder is harmful to health, and board markers are consumables, so once a certain amount is consumed, they must be replaced with a new board marker, so there is a fixed cost. be. Therefore, in recent years, electronic blackboards have been increasingly used to give lectures at schools and workplaces.

In recent years, as the demand for not only face-to-face lectures but also non-face-to-face online lectures has increased, video conference systems and image education systems are used to write on the electronic blackboard, and the content is displayed on the display device of the students listening to the lecture. In fact, the use of systems that allow users to check the contents of their blackboards by outputting them to the Internet is also increasing.

In this method of writing on an electronic blackboard, when you write on the electronic blackboard using an electronic pen, the content is recognized by pressure sensors, infrared sensors, ultrasonic sensors, etc. formed on the blackboard and output to a display device. do. Among them, in the case of a pressure sensor, there is a gap between the screen and the board, and when you press it with your finger, a current flows and it is recognized. Although it is possible to realize it with a simple principle, The disadvantage is that there is a limit to the size of the blackboard. When an infrared (IR) sensor is used, the IR sensor is attached around the screen and the coordinates of writing on the board are recognized by continuously emitting an infrared signal. In addition, in the case of an ultrasonic sensor, instead of an IR sensor, an ultrasonic device is attached around the screen and a signal is given through an ultrasonic electronic pen, and the coordinates are read by sending and receiving with the attached device. It is. This type of ultrasonic method has the advantage of being simple and relatively low cost, but the interaction is slower than the manual touch method and requires the use of a specific ultrasonic electronic pen. Therefore, it has the disadvantage of being less versatile.

Therefore, among the various methods mentioned above, a method using an infrared sensor has become popular, and the infrared sensor is installed on the edge of an electronic blackboard and continuously emits an infrared signal, and is used with an electronic pen (IR pen). When written on the board, the system is configured to recognize the coordinates. When written on a board using the electronic pen, the content can be transmitted to a computer via Bluetooth communication or the like.

However, with the infrared method, malfunctions may occur due to disturbances caused by light flowing in from the outside and the IR pen. The disadvantage is that it may be recognized. Furthermore, when a large number of people use multiple electronic pens, the content may overlap or become more complex, making it difficult to confirm who created the blackboard, and Even when you want to specify and delete only the content written on the board with a pen, there is no way to confirm this.

Korean Patent Registration No. 10-1378318

To provide an electronic blackboard that can recognize the position of writing on the electronic blackboard using a multi-electronic pen with a position identification function.

Moreover, it is obvious that not only the above-mentioned technical problem but also other technical problems can be derived from the following explanation.

An electronic whiteboard according to an embodiment of the present disclosure includes a screen portion on which an infrared sensing sensor is installed on a corner side, on which a screen outputted via a projector is projected, and an infrared signal is sent to the screen portion to display writing on the board. a plurality of electronic pens and a sensor section that sets positional coordinates throughout the screen section and tracks the position of the writing on the board from infrared signals sent out through the plurality of electronic pens and detects positional information. and a control unit that receives video information for writing on a board from the screen unit and position information sensed from a plurality of electronic pens, and outputs the video information and position information to an output device.

According to a preferred aspect of the present disclosure, the plurality of electronic pens are characterized in that writing is performed on the screen portion using a simultaneous multi-point recognition method.

According to a preferred aspect of the present disclosure, the control unit assigns an ID to each of the plurality of electronic pens, and when writing is performed on the screen unit through each electronic pen to which the ID has been assigned, each electronic The electronic pen is characterized in that the pen outputs an ID assigned to the electronic pen at the final position written on the board.

According to a preferred aspect of the present disclosure, the ID given to the electronic pen is made up of any one selected from numbers, colors, patterns, and codes, and is output to the output unit. shall be.

According to a preferred aspect of the present disclosure, the control unit senses the previous position and current position of each electronic pen to which an ID has been assigned, and calculates the current position from the previous position of each electronic pen based on the position coordinates of the screen unit. The present invention is characterized in that it measures a position change value up to and outputs an image derived using the position change value to an output unit.

According to a preferred aspect of the present disclosure, the control unit sets a specific ID in content written on the board using a plurality of electronic pens assigned IDs, and sets a position change value of the content written on the board through the specific ID. The method is characterized in that only images derived using the position change value are deleted.

According to embodiments of the present disclosure, there is an advantage that a plurality of electronic pens can be used to simultaneously write on the screen part using a simultaneous multi-point recognition method.

Further, according to the embodiment of the present disclosure, an ID is given to each electronic pen, and by tracking the position of the electronic pen, it is possible to easily recognize the contents written on the board by a writer.

Further, according to the embodiment of the present disclosure, by identifying only the images derived using the position change value for the ID assigned to each electronic pen, selective deletion is possible by the selection of many board writers. It has the advantage of being

It should be understood that the effects of the present invention are not limited to the above-mentioned effects, but include all effects that can be inferred from the detailed description of the invention or the structure of the invention described in the claims. No.

FIG. 1 is a conceptual diagram of an electronic whiteboard according to an embodiment of the present disclosure. FIG. 2 is a diagram illustrating a state in which an electronic pen is used to write on an electronic blackboard according to an embodiment of the present disclosure. FIG. 1 is a block diagram of an electronic whiteboard according to an embodiment of the present disclosure. FIG. 2 is a detailed diagram of a portion of the electronic blackboard according to an embodiment of the present disclosure, in which content written on the board with a specific electronic pen is deleted;

Hereinafter, the configuration, operation, and effects of the electronic whiteboard according to the preferred embodiment will be described with reference to the accompanying drawings. In the following drawings, each component is omitted or schematically illustrated for convenience and clarity, and the size of each component reflects its actual size. It's not a thing. Further, the same components are given the same reference numerals throughout the specification, and the same reference numerals are omitted in the individual drawings.

FIG. 1 shows a conceptual diagram of an electronic blackboard according to an embodiment of the present disclosure, and FIG. 2 shows a state diagram of writing on the electronic blackboard using an electronic pen.

An electronic whiteboard according to an embodiment of the present disclosure includes a screen section 100 on which an infrared sensing sensor 110 is installed on a corner side, on which a screen outputted via a projector 120 is projected, and an infrared signal transmitted to the screen section 100. Position coordinates are set for the entire screen unit 100 and the plurality of electronic pens 200 that are sent out to write on the board, and the position of the writing on the board is tracked from the infrared signals sent out through the plurality of electronic pens 200. A sensor unit 300 that senses position information, receives video information of writing on the board from the screen unit 100, and position information sensed from a plurality of electronic pens 200, and outputs the video information and position information to an output device. and a control unit 400 that performs.

First, the electronic blackboard has the shape of a blackboard on which writing is performed, and may have the shape of a general blackboard or whiteboard installed in a classroom or a conference room. The screen unit 100 serves as a medium for writing on an electronic blackboard using an electronic pen 200, and a screen is projected onto a rectangular board such as the aforementioned whiteboard via a projector 120. It may be an area, or it may be a device whose screen is output from the monitor itself via an output device such as a computer monitor.

Infrared sensing sensors 110 are installed at each corner of the screen part 100, preferably at each corner of the rectangular screen part 100. The sensing sensor 110 sends an infrared signal when writing is performed on the screen unit 100 with the electronic pen 200, and recognizes the coordinates by sensing the signal. As described above, by sensing the infrared signal and sending the coordinates to the control unit 400, the contents of the board and the image can be transmitted.

Next, the electronic pen 200 is a device that performs writing on a board by sending an infrared signal to the screen unit 100, and may be composed of one or more, and may have a normal pen shape. However, the present invention is not limited to this, and any configuration may be used as long as the shape can be held by the user to write on the board, such as a pointer or a remote controller. Preferably, the electronic pen 200 is composed of a plurality of electronic pens, and when writing is performed on the screen unit 100, an infrared signal is generated, and the sensing sensor 110 senses the information of the content written on the board at the coordinates. is transmitted to the control unit 400. Here, if the screen unit 100 is a general board shape and is an area on which a screen is projected using the projector 120, it is possible to write on the board using the electronic pen 200 on the projected screen. In the case of an output device such as a monitor, it is possible to write directly on the board using the electronic pen 200 on the screen output to the monitor.

Next, the screen unit 100 includes a sensor unit 300 that sets position coordinates on the entire screen unit 100 and detects position information by tracking the position of the board based on infrared signals sent out through the plurality of electronic pens 200. Especially when the electronic pen 200 is composed of a plurality of electronic pens 200, writing on the board with each electronic pen 200 may overlap or overlap, making it difficult to check what kind of writing on the board a certain electronic pen 200 did. Difficult things can happen. Therefore, in order to check the content written on the board by each electronic pen 200, the sensor unit 300 for position tracking can be provided. The sensor unit 300 may be installed on one side of the screen unit 100, or may be installed at a position separated from the screen unit 100 by a predetermined distance so that it can sense the entire screen unit 100. The sensor unit 300 sets position coordinates on the entire screen unit 100, and the plurality of electronic pens 200 tracks the position of the writing on the board of the electronic pen 200 based on infrared signals sent out while writing on the board. and is designed to sense its location information. In addition, position information regarding the content written on the board using the electronic pen 200 is transmitted to the control unit 400, and then the position information is transmitted to an output device or the like that can be confirmed by the user with the naked eye.

More specifically, the control unit 400 receives video information for writing on the board from the screen unit 100 and position information sensed from a plurality of electronic pens 200, and outputs the video information and position information to an output device. can be included. The control unit 400 receives the content written on the board through the electronic pen 200, tracks the position of the board, receives a sensed signal, and outputs it to an output device that can be checked by the user. Accordingly, it is possible to grasp positional information regarding the content written on the board by a large number of electronic pens 200.

According to a preferred aspect of the present disclosure, the plurality of electronic pens 200 are characterized in that writing is performed on the screen unit 100 using a simultaneous multi-point recognition method.

Normally, most of the writing on the board is done by an educator using a single electronic pen 200 using an electronic blackboard, and it is not possible for a large number of people to participate at once and write ideas on the board while exchanging opinions with each other. It was not a commonly used method. However, according to the electronic blackboard according to an embodiment of the present disclosure, when writing is performed on the screen unit 100 using the electronic pen 200, not only when writing on the board using a single pen, but also when writing on the board using two or more pens. Especially when writing on the board at the same time using the electronic pen 200, the writing on the board can be performed using a simultaneous multi-point recognition method so that the contents can be input at the same time and the positions can be recognized. This makes it possible for a large number of people to simultaneously create their own blackboard content and share it.

According to a preferred aspect of the present disclosure, the control unit 400 assigns an ID to each of the plurality of electronic pens 200, and writes on the screen unit 100 through each electronic pen 200 assigned an ID. The electronic pen 200 is characterized in that each electronic pen 200 outputs the ID assigned to the electronic pen 200 at the final position written on the board.

When a plurality of electronic pens 200 described above perform writing on a board using the simultaneous multi-point recognition method, it is unclear what kind of content was written on the board by a certain person, and the content of each person's writing on the board overlaps. There is now a need for a function to delete unnecessary parts. As a result, the control unit 400 assigns an ID to each electronic pen 200 that writes on the board, and when the electronic pen 200 to which the ID is assigned writes on the board, the content written on the board returns to the final position. The ID is also output. With the above-mentioned ID assignment method, a user using a plurality of electronic pens 200 can grasp the contents of his/her own writing on the board, and in particular, when inputting various contents, by recognizing the final position of the contents written on the board, It can function so that writing on the board can be performed after that.

According to a preferred aspect of the present disclosure, the ID given to the electronic pen 200 is made up of any one selected from numbers, colors, patterns, and codes, and is configured to be output to the output unit. Features.

The ID may be a specific type of ID that has already been set by the user, and may be one of IDs that are displayed in a variety of ways, such as not only letters but also numbers, colors, specific patterns, and codes. can be one. By using the ID display method described above, the electronic pen 200 that each user uses is displayed more easily, which helps the user to confirm the information, and by providing differentiation from other users, it is possible to easily display the electronic pen 200 that each user uses. It has the advantage of being able to confirm each other.

FIG. 3 shows a block diagram of an electronic whiteboard according to an embodiment of the present disclosure.

According to a preferred aspect of the present disclosure, the control unit 400 senses the previous position and current position of each electronic pen 200 to which an ID has been assigned, and determines the previous position and current position of each electronic pen 200 from the position coordinates of the screen unit 100. The present invention is characterized in that a position change value from a position to a current position is measured, and an image derived using the position change value is output to an output unit.

This is a method in which each electronic pen 200 to which the ID has been assigned performs writing on the board using a simultaneous multi-point recognition method, thereby checking the entire contents of the writing on the board from beginning to end. 400 senses the previous position and current position of each electronic pen 200, measures the position change value from the previous position to the current position from the position coordinates set on the entire screen unit 100, and uses the position change value. The derived image can be output to an output unit. For example, when writing on a board is performed several times with one electronic pen 200, the position change value from the position s1 where the electronic pen 200 first makes contact to the position s2 where the contact is released is measured, and the value of the change in position is measured when the next contact is made. The positional change value from the position s1 where contact was made to the position s2 where contact was released is measured, and the image derived from this is output to the output unit. Here, at the final position of the image derived using the position change value, the ID assigned to the electronic pen 200 can be output in various ways, so that writing on the board by multiple electronic pens 200 is possible. In addition to the content, the procedure for writing on the board and the ID of the person writing on the board can be confirmed at the same time based on the position change value.

FIG. 4 shows a detailed diagram of a portion of the electronic blackboard according to an embodiment of the present disclosure, in which content written on the board with a specific electronic pen is deleted.

According to a preferred aspect of the present disclosure, the control unit 400 sets a specific ID among the content written on the board by the plurality of electronic pens 200 assigned IDs, and through the specific ID,
The present invention is characterized in that the position change value of the content written on the board is tracked, and only the image derived using the position change value is deleted.

In the case where there are a plurality of electronic pens 200, if each of them overlaps or overlaps while writing on the board, there is a disadvantage that it is not possible to separate and delete only the content written on the board by a particular electronic pen 200. Therefore, the electronic pen 200 can confirm the content written on the board by the electronic pen 200 through the assigned ID, set the ID written on the board by the specific electronic pen 200, and set the ID written on the board by the specific electronic pen 200, and then By tracking the change value and deleting only the image derived using the position change value, there is an advantage that only the desired contents of the board can be selectively deleted according to the selection of the board writer.

Although preferred embodiments of the present invention have been described above with reference to the attached drawings, the embodiments described in this specification and the configurations shown in the drawings are merely one of the most preferred embodiments of the present invention. It should be understood that there may be various equivalents and modifications that can be substituted for these at the time of filing this application, as they do not represent all of the technical ideas of the present invention. Therefore, the embodiments described above should be understood to be illustrative in all respects and not restrictive, and the scope of the present invention will be more clearly understood later than in the detailed description. It is defined by the scope of the claims, and all modifications and variations that come from the meaning and scope of the claims and equivalents thereof are to be construed as falling within the scope of the invention.

100 Screen section 110 Sensing sensor 120 Projector 200 Electronic pen 300 Sensor section 400 Control section

Claims (6)

A screen part with an infrared sensor installed on the corner side and onto which the screen output from the projector is projected;
a plurality of electronic pens that perform writing on a board by sending infrared signals to the screen portion;
a sensor unit that detects position information by setting positional coordinates on the entire screen unit and tracking the position of the writing on the board from infrared signals sent out through the plurality of electronic pens;
a control unit that receives video information for writing on a board from the screen unit and position information sensed from the plurality of electronic pens, and outputs the video information and position information to an output device;
Including electronic blackboard. The electronic whiteboard according to claim 1, wherein the plurality of electronic pens write on the screen part using a simultaneous multi-point recognition method. The control unit includes:
assigning an ID to each of the plurality of electronic pens;
When writing is performed on the screen section through each electronic pen to which an ID is assigned, each electronic pen outputs the ID assigned to the electronic pen at the final position of the writing on the board. The electronic blackboard according to item 1. 4. The electronic pen according to claim 3, wherein the ID given to the electronic pen consists of any one selected from numbers, colors, patterns, and codes, and is output to an output unit. blackboard. The control unit includes:
Detects the previous and current positions of each electronic pen assigned an ID,
measuring the position change value of each electronic pen from its previous position to its current position from the position coordinates of the screen part;
The electronic whiteboard according to claim 3, wherein the image derived using the position change value is output to an output unit. The control unit includes:
Set a specific ID in the content written on the board using multiple electronic pens assigned IDs,
Tracking the position change value of the content written on the board through the specific ID,
6. The electronic whiteboard according to claim 5, wherein only the image derived using the position change value is deleted.

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