KR102446679B1 - Electronic board of improved hand-writing recognition on infrared touch panel and operating method thereof - Google Patents

Abstract

According to various embodiments of the present disclosure, an electronic blackboard with improved writing recognition of an infrared touch panel and an operating method thereof are disclosed. The electronic blackboard includes a processing unit. The processing unit performs: in an initial state in which an object is not detected through a plurality of infrared light receiving elements configured to identify at least two types of infrared rays, checking the infrared sensing data in which the amount of infrared light is measured; based on the value of the infrared sensing data, when a change in the amount of light is confirmed in at least a part of the amount of infrared light in the initial state, identifying two or more infrared light receiving elements that detect a change in the amount of light; checking paths of two or more infrared rays and infrared rays of different types identified in each of the two or more infrared light receiving elements; and processing to determine a touch coordinate touched by the object among coordinates in an area where a path intersects based on an area where the paths of the two or more infrared rays of different types intersect and an amount of change in the amount of infrared light.

Description

Electronic board with improved handwriting recognition of infrared touch panel and its operation method

The present invention relates to an electronic board with improved writing recognition of an infrared touch panel and an operating method thereof, and more particularly, to an infrared touch panel writing recognition for more accurately identifying and displaying the position of an object used for writing on the electronic board It relates to an improved electronic board and an operating method thereof.

The electronic blackboard refers to a device in which a user directly inputs content to be displayed on the screen by touching an object on a touch panel combined with a screen, and it has been gradually enlarged in recent years.

The touch panel of the electronic board is equipped with a sensor to recognize a touch using an object. In order to solve the problems of recognition rate and writing feeling, which are pointed out as disadvantages of the pressure-sensitive touch panel, a capacitive touch panel or an infrared touch panel is adopted. A blackboard is mainly used.

In general, in the case of an infrared touch panel, the method for determining the writing position is that the infrared ray irradiated from the infrared light emitting device of the infrared transmitter is sensed in a one-to-one correspondence with the infrared light receiving sensor of the infrared receiver to determine the writing position. The area in which infrared rays irradiated from the infrared light emitting device can be sensed by the infrared light receiving sensor is limited by the physical size of the light emitting element and the infrared light receiving sensor.

As a method to solve this problem, Korean Patent Registration No. 10-1890695 receives infrared rays irradiated from one infrared light emitting device and increases the number of infrared light receiving sensors that process it, thereby reducing the portion where the writing is not recognized. Although a technique for improving the writing recognition rate has been disclosed, there is still a limit to accurately recognizing an object or accurately displaying the writing content of the object.

An object of the present invention is to provide an electronic board with improved handwriting recognition of an infrared touch panel so as to accurately identify an object and a touch position of an object on a touch screen using an infrared touch panel, and an operating method thereof.

An object of the present invention is to provide an electronic board with improved writing recognition of an infrared touch panel and an operating method thereof so that writing performed through an object on a touch screen using an infrared touch panel is displayed on the screen more accurately and delicately. have.

Problems to be solved through various embodiments of the present invention are not limited to the aforementioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to an embodiment of the present invention, a screen, one side of the screen, including two or more infrared light emitting devices that generate and emit infrared light for recognizing the touch coordinates of an object close to the screen, the two or more infrared light emission The device includes an infrared transmitter configured to include at least two types of infrared light emitting elements, and a plurality of infrared light receiving elements for receiving, on the other side of the screen, at least a portion of infrared rays emitted from the at least two types of infrared light emitting elements. However, each of the plurality of infrared light receiving elements is configured to receive two or more infrared rays of different types from at least some of the two or more infrared light emitting elements, the infrared touch panel comprising an infrared receiver; and confirming the infrared sensing data in which the infrared light quantity is measured as an initial state in which the object is not detected through a plurality of infrared light receiving elements configured to identify the at least two types of infrared rays, and based on the value of the infrared sensing data, the initial When a change in the amount of light is confirmed in at least a part of the amount of infrared light in the state, two or more infrared light receiving elements sensing the change in light amount are identified, and two or more infrared and infrared paths of different types identified in each of the two or more infrared light receiving elements to determine the touch coordinates touched by the object from among the coordinates in the area where the paths intersect based on the area where the paths of two or more different infrared rays of different types intersect and the amount of change in the amount of infrared light Disclosed is an electronic board with improved handwriting recognition of an infrared touch panel, including a processing unit.

Here, when the character identified based on the determined touch coordinates is two or more connected characters or the characters cannot be identified, the processing unit adjusts the amount of light of at least a portion of the at least two types of infrared light emitting devices to be drawn by the touch coordinates. can modify the character recognition rate.

Here, when the character identified based on the determined touch coordinates is two or more connected characters or the character cannot be identified, the processing unit recognizes the object and then receives light sensitivity to the amount of infrared light as a criterion for determining the start of writing can be adjusted to modify the recognition rate of characters drawn by the touch coordinates.

Here, the processing unit identifies the infrared type of the changed amount of light based on at least a part of the wavelength and phase of the infrared received by each of the plurality of infrared light receiving elements, and an infrared light emitting element emitting infrared light of each of the identified types can be judged

Here, the processing unit, in each of the plurality of infrared light receiving elements, when there are two or more infrared light emitting elements emitting the same type of infrared light among a plurality of infrared light emitting elements set to identify the type of received infrared rays, the same type of A change in the amount of infrared light may be determined based on the sum of the amount of infrared light.

Here, when the size of the area where the path intersects is larger than the size of the unit area of the content displayed on the screen based on the determined touch coordinates, the processing unit determines the priority of the infrared path based on the amount of change in the amount of infrared light. may be determined, and the size of the region where the paths intersect may be reset based on the intersecting region of the infrared path reflecting the priority of the infrared path.

Here, the processing unit, by adjusting the light amount of at least a portion of the at least two types of infrared light emitting devices or by adjusting the light reception sensitivity to the infrared light amount, which is a criterion for determining the start of writing after recognizing the object, to the touch coordinates Based on this, the maximum thickness of the points and lines displayed on the screen may be controlled.

According to various embodiments of the present disclosure, the method may include: checking infrared sensing data in which an amount of infrared light is measured as an initial state in which an object is not detected through a plurality of infrared light receiving elements configured to identify at least two types of infrared rays; identifying two or more infrared light receiving elements that sense a change in the amount of light when a change in the amount of light is confirmed in at least a part of the amount of infrared light in the initial state based on the value of the infrared sensing data; checking the paths of two or more infrared rays and infrared rays having different types identified in each of the two or more infrared light receiving elements; and determining the touch coordinates touched by the object from among the coordinates in the region where the paths intersect based on the region where the paths of two or more different infrared rays intersect each other and the amount of change in the amount of infrared light. , Disclosed is a method of operating an electronic board with improved handwriting recognition of an infrared touch panel.

According to various embodiments of the present invention, in determining the touch coordinates of an object touching the touch panel by setting different wavelengths, phases, etc. of infrared rays emitted by infrared light emitting devices constituting the infrared touch panel, determination due to infrared interference It is possible to reduce the error and improve the accuracy of the operation of determining the touch coordinates.

According to various embodiments of the present disclosure, even if a problem occurs in the infrared light emitting device of some wavelengths by differentiating the wavelength and phase of the infrared rays, the performance of determining the touch coordinates of the object is rapidly reduced by supplementing the infrared light emitting devices of other wavelengths. prevent, and thus improve user satisfaction.

According to various embodiments of the present disclosure, by accurately determining the touch coordinates of an object through infrared rays of various wavelengths and phases, uniformity in the implementation of characters can be improved, and thus, a user's natural handwriting can be induced.

1 is a view showing the configuration of an electronic board according to an embodiment of the present invention.
2 is a view for explaining the configuration of the infrared touch panel and the operation of the infrared element constituting the infrared touch panel according to an embodiment of the present invention.
3 is a diagram schematically illustrating a side configuration of an infrared touch panel according to an embodiment of the present invention.
4A, 4B, and 4C are diagrams illustrating an operation of displaying a writing identified by an infrared touch panel on a screen according to an embodiment of the present invention.
5 is a flowchart of an operation of recognizing a writing on the electronic board and displaying it on the screen according to an embodiment of the present invention.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, since various changes may be made to the embodiments, the scope of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents or substitutes for the embodiments are included in the scope of the rights.

Terms used in the examples are used only for the purpose of description and should not be construed as limiting. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by those of ordinary skill in the art to which the embodiment belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

In addition, in the description with reference to the accompanying drawings, the same components are given the same reference numerals regardless of the reference numerals, and the overlapping description thereof will be omitted. In the description of the embodiment, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the embodiment, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but another component is between each component. It will be understood that may also be "connected", "coupled" or "connected".

Components included in one embodiment and components having a common function will be described using the same names in other embodiments. Unless otherwise stated, descriptions described in one embodiment may be applied to other embodiments as well, and detailed descriptions within the overlapping range will be omitted.

'Data' processed on the electronic board can be expressed in terms of 'information'. Here, information may be used as a concept including data.

The present invention provides an infrared touch panel as a means for recognizing writing using an object and displaying the recognized writing on a screen, through which the touch coordinates of an object used for writing are more accurately identified and the writing identified through the screen Disclosed are an electronic board capable of improving the display quality of the identified writing and the user's writing feeling by implementing the method and an operating method thereof.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings, and the drawings attached to the present specification serve to further understand the technical spirit of the present invention together with the detailed description of the present invention, so the present invention is described in the drawings It should not be construed as being limited only to the matters.

1 is a view showing the configuration of an electronic board according to an embodiment of the present invention.

Referring to FIG. 1 , the electronic board 100 may include a processing unit 110 , a storage unit 120 , a communication unit 130 , and a touch panel 140 . According to various embodiments of the present disclosure, the processing unit 110 processes sensing data of an object input through the touch panel 140 to recognize the user's writing, generates content corresponding to the writing, and displays the content on the screen. can be displayed

Here, the writing may indicate an action in which the user inputs characters, images, symbols, equations, etc. on the touch panel by using an object. In addition, the content corresponding to the writing may indicate content generated according to the user's intention by identifying characters, images, symbols, formulas, and the like when the user wants to write on the touch panel 140 through an object.

According to an embodiment, when a user writes a character through an object, the processing unit 110 implements the user's handwriting input such as the shape, thickness, and texture of the character in response to the movement of the object as it is to display the contents as characters. can be created and displayed on the screen.

To this end, the processing unit 110 may determine the touch coordinates input through the object from the sensing data sensed through the touch panel 140 , and implement contents corresponding to the writing by using the checked characteristics of the touch coordinates.

The processing unit 110 may apply an artificial intelligence algorithm in identifying touch coordinates corresponding to the user's writing and generating content based on the identified coordinates. For example, the processing unit 110 may generate the shape of the content matching the writing by applying the identified touch coordinates to a regression analysis algorithm learned as an input value.

When the content determined based on the identified touch coordinates is two or more connected characters, the processing unit 110 applies the identified touch coordinates and/or the determined characters to the regression analysis algorithm learned as an input value to distinguish the characters. It is possible to determine an area to delete content for.

As described above, the processing unit 110 identifies touch coordinates of an object input through the touch panel 140 through an artificial intelligence algorithm, and creates content based on the identified touch coordinates to implement content for the user's writing. accuracy can be improved.

In addition, the processing unit 110 may recognize the user's voice input through a microphone (not shown) through artificial intelligence technology (ex STT (speak to text), natural language processing technology, etc.).

In implementing the content corresponding to the coordinates based on the touch coordinates identified through the touch panel 140 , the processing unit 110 may apply the input user voice to improve the content implementation accuracy for the user's writing.

In addition, the electronic board 100 is based on the user's writing (or content implemented based on the writing) and / or the voice recognized through artificial intelligence technology, etc. peripheral devices (ex lighting, beam projector, speaker, etc.). For example, the identified touch coordinates, content implemented based thereon, and/or the identified voice may include a control command for controlling the electronic board 100 or a peripheral device related thereto.

When the control command is confirmed, the processing unit 110 may perform the operation of the electronic board 100 corresponding to the control command through a program (app, application, tool, plug-in, etc., hereinafter data processing program) for processing the control command. Alternatively, data for controlling the operation of a peripheral device connected to the electronic board 100 may be transmitted through the communication unit 130 .

Hereinafter, in various embodiments, the electronic board 100 performs or provides data processing (or event) related to the control command, performing a specified operation through at least one data processing related program of the electronic board 100. can be understood as

Here, the data processing is described as being provided through the data processing program installed on the electronic board 100, but is not limited thereto, and may be provided through another pre-installed program or a temporary installation program. According to an embodiment, the data processing may be performed through at least a part of the database provided free of charge or in a flow path from the electronic board 100 external device.

The storage unit 120 may store various data processed by at least one component (eg, the processing unit 110 or the communication unit 130) of the electronic board 100. The data is, for example, the touch panel ( 140) may include input data or output data for a program (or software) for data processing input through, data, various categories generated based on data, and commands related thereto.

The storage unit 120 includes coordinate information set on the screen 200, an identification code of the infrared light receiving elements, an identification code of the infrared light emitting elements, an identification code for an infrared light emitting element designated to identify each of the infrared light receiving elements, and an infrared ray between them. At least some information among coordinates included in each of the path and the infrared path may be included as infrared information.

In addition, the storage unit 120 includes an identification code of an infrared light emitting device that transmits infrared rays having specific coordinates as a path with respect to at least some of the coordinates of the screen 200 and infrared rays having the specific coordinates included in the path, and the specific coordinates. Identification code of the infrared light receiving element that receives the infrared rays included in the path, the infrared type (eg, wavelength, phase, etc.) and amount of light emitted from each infrared light emitting element, and there is no object on the screen 200 (initial state) ) of the amount of infrared light measured by the infrared light receiving element that receives infrared in can

Also, the storage unit 120 may store at least a portion of the infrared information as a mapping table. For example, sensing data measured according to the state where the object is located on the screen 200, that is, an infrared light receiving element in which a change in the amount of infrared light received at a specific position where the object is located, and a change in the amount of light occurs As a mapping table for determining coordinates matching information such as an infrared light emitting device emitting infrared rays, a change in the amount of light for each infrared light in which a change in the amount of light is generated, and the amount of light measured before and after the position of an object can be saved

The storage unit 120 may store information such as a shape of at least one character and a pattern in which characters are written. For example, it stores information about the shape of each letter, letter, symbol, etc. (hereinafter referred to as "letter") of various languages, including Hangul and the alphabet, and stores information about the order and/or curvature of the corresponding letters. It also contains information about writing patterns.

For example, the storage unit 120 includes information about the morphological characteristics of the letter 'A' in the case of Hangeul, and information about the order in which the letter 'A' is written is also stored. In addition, the storage unit 120 may store information about the morphological characteristics of the words as well as information about the order in which the words are written.

The storage unit 120 stores an artificial intelligence algorithm including at least some of an artificial neural network algorithm, a block chain algorithm, a deep learning algorithm, a regression analysis algorithm, and related mechanisms, operators, language models, and big data for providing data processing. may include

For example, the storage unit 120 may include an algorithm for generating content implemented based on touch coordinates input through the touch panel 140 and/or an algorithm for performing a specified operation in this regard. have.

In addition, the storage unit 120 may include an algorithm for identifying a user through touch coordinates input through the touch panel 140 and implemented content, and/or an algorithm for performing a specified operation in this regard. .

The storage unit 120 may store various information related to voice processing input through the microphone. For example, the storage unit 120 may include at least one algorithm for processing a voice from audio input through a microphone, such as a voice recognition algorithm, a speaker recognition algorithm, and a natural language processing algorithm.

Also, the storage unit 120 may include at least one algorithm for processing a touch input through the touch panel 140 , such as a touch pattern recognition algorithm, a voice link algorithm, a touch user identification algorithm, and the like.

The storage unit 120 may include data for determining and processing a specified control and operation through a signal identified through each device included in the touch panel 140 .

Data stored in the storage unit 120 is processed by the processing unit 110, and data for processing related operations, data being processed, processed data, preset data, etc. may be stored in the storage unit 120 as a database. have.

Data stored in the storage unit 120 may be changed, modified, deleted, or generated through the processing unit 110 based on a manager input of the electronic board 100 or a user input of a user device.

The storage unit 120 may include a volatile memory or a non-volatile memory.

The communication unit 130 supports the establishment of a wired communication channel of the electronic board 100 and at least one other electronic device (eg, a user device or a server), establishment of a wireless communication channel, and communication through the established communication channel. can

The communication unit 130 may include one or more communication processors that operate dependently or independently of the processing unit 110 and support wireless communication. According to an embodiment, the communication unit 130 may include a wireless communication module (eg, a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (eg, a local area network (LAN)). communication module, or a power line communication module).

The communication unit 130 is a short-range communication network and/or a cellular network, the Internet, or a computer network such as Bluetooth, Bluetooth Low Energy (BLE), WiFi, WiFi direct, IrDA (infrared data association), ZigBee, UWB, and RF (Radio Frequency). It can communicate with an external electronic board through a telecommunication network (eg, LAN or WAN).

Various types of communication modules constituting the communication unit 130 may be integrated into one component (eg, a single chip) or may be implemented as a plurality of components (eg, a plurality of chips) separate from each other.

The touch panel 140 may include a touch input capable screen. The touch panel 140 includes an infrared element unit for recognizing an object approaching the touch panel and an object in contact with the screen through infrared rays, and a screen 200 for visually displaying content generated based on the recognized object. can be configured.

The touch panel 140 may be configured as a touch screen including an infrared element unit as an input unit and a screen 200 visually displaying processed information as an output unit. Hereinafter, according to various embodiments of the present invention, the touch panel 140 will be described as referring to a touch screen unless otherwise specified.

The electronic board 100 may recognize the user's writing by processing, through the processing unit 110 , sensing data of an object that approaches, contacts, and/or moves to the touch panel 140 through the user.

The processing unit 110 receives infrared rays emitted from the infrared light emitting element constituting the infrared element unit of the touch panel 140 from the infrared light receiving element, and based on the infrared rays blocked by the location of the object between them, the object is displayed on the screen 200 . It is possible to determine the touch coordinates located on the screen and/or the distance the object is separated from the screen 200 .

To this end, the coordinates specified on the screen 200 of the touch panel are configured so that two or more infrared paths intersect, and the touch coordinates of the object based on the intersecting infrared information and the amount of light and the infrared information and the amount of light blocked by the object And/or it is possible to determine the distance the object is away from the screen (200).

In addition, the processing unit 140 through the operation of the infrared element constituting the touch panel 140 when the object is close to within a specified distance from the screen 200 in a state that does not directly contact the screen 200, the object can be identified and , it can be processed to perform a specified operation in a state that does not touch the screen 200 . According to various embodiments, a touch input for processing a specified operation in a state in which the object does not come into contact with the screen 200 may be defined as an air touch.

The object used for writing on the touch panel 140 may include at least one of a part of the user's body, such as a finger or palm, for performing a touch input, or a means for touching (eg, a stylus, a touch pen).

The configuration of the touch panel 140 and the operation of the processing unit 110 based on the touch panel 140 will be described in detail below with reference to various drawings.

In addition, the electronic board 100 may further include at least some of an input unit (not shown) for inputting data, such as a keyboard, a mouse, and an output unit (not shown) for outputting data, such as a speaker, a driving unit, and a separate screen.

According to various embodiments, the electronic board 100 or the user device may include at least some of the functions of all information and communication device ranges, including mobile communication terminals, multimedia terminals, wired terminals, fixed terminals, and internet protocol (IP) terminals. have.

The electronic board 100 may include at least some functions of a workstation or a large-capacity database as a data processing device, or may be configured to be connected through communication.

A user device connected to the electronic board 100 is a mobile phone, a personal computer (PC), a portable multimedia player (PMP), a mobile internet device (MID), a smartphone, a tablet PC, and a panel. A tablet PC, a notebook computer, or the like may be exemplified. According to various embodiments, the user device may be described as a device for managing data processing of the electronic board 100 .

Here, the server is an entity existing on the network, and serves as a web server, a database server, and an application server. According to a preferred embodiment, the server may provide various contents to the user device based on the processing of the electronic board 100 to the user device.

According to various embodiments, the user device may include a mobile phone of an instructor and/or a student.

2 is a view for explaining the configuration of the infrared touch panel and the operation of the infrared element constituting the infrared touch panel according to an embodiment of the present invention.

As described above, the touch panel 140 may include an infrared element unit and a screen 200 that visually displays content generated based on the recognized object.

The infrared element unit is formed in the edge area of the screen 200, for example, inside the bezel (not shown), and the infrared element unit includes an infrared light emitting sensor that generates and emits infrared rays for detecting an object. 201 and 211 and infrared receivers 203 and 213 configured to include an infrared light receiving element for receiving infrared rays.

The infrared element part of the touch panel 140 may be configured in a plurality of sets based on the shape of the screen, and as shown in FIG. 2 , the touch panel 140 configured in the shooting shape has one upper and lower part. It may be configured to include an infrared element unit consisting of a total of two sets of three sets and one set of left and right sides.

A first set of infrared element units (hereinafter, referred to as first infrared element units) configured in the upper and lower portions of the touch panel 140 are provided on the lower bezel of the screen 200 , the first infrared transmitter 201 , and the screen 200 . The first infrared receiver 203 may be configured on the upper bezel.

In addition, the second set of infrared element units (hereinafter, referred to as the second infrared element unit) configured on the left and right sides of the touch panel 140 is a second infrared transmitter 211 and a screen 200 on the left bezel of the screen 200 . The second infrared receiver 213 may be configured on the right bezel of the .

Referring to the first infrared element unit, infrared rays emitted from one infrared light emitting element are configured to be received and identified by a plurality of infrared light receiving elements. For example, the infrared rays emitted from the third infrared light emitting element of the first infrared transmitting unit 201 are configured to be identified by the first, second, third, fourth, and fifth infrared light receiving elements of the infrared receiving unit 203 . can be

For another example, the infrared rays emitted from the 5th infrared light emitting element of the first infrared transmitting unit 201 are identified by the 3rd, 4th, 5th, 6th, and 7th infrared light receiving elements of the infrared receiving unit 203 . can be configured.

As described above, the infrared rays emitted from each of the infrared light emitting elements of the infrared transmitter included in the infrared element unit of the touch panel 140 may be identified through a plurality of infrared light receiving elements. In addition, as described above, although it has been described that infrared rays emitted from one infrared light emitting element are identified by five infrared light receiving elements, the present invention is not limited thereto, and may be processed differently depending on the configuration or setting information of the infrared element unit.

In addition, one infrared light receiving element may receive infrared rays emitted from a plurality of infrared light emitting elements, and may identify infrared rays received from at least two or more infrared light emitting elements.

To this end, at least two or more of the infrared light emitting devices included in the infrared transmitter of the touch panel 140 may be configured to emit (or irradiate) infrared rays of different types (eg, wavelength (or frequency), and/or phase). can For example, the infrared light emitting devices arranged in the infrared transmitter may be divided into a plurality of light emitting groups according to a specified order and number, and each of the infrared light emitting devices included in each group may be configured to emit infrared rays of different wavelengths. . In addition, the infrared light emitting elements included in each light emitting group may be configured to have a pattern emitting infrared light of a specific wavelength according to an arrangement position.

In the 12 infrared light emitting devices constituting the first infrared transmitting unit 201, when four infrared light emitting devices are divided into one light emitting group according to the number order, No. 1, No. 5, and No. 9 are the same first Infrared light emitting devices emitting infrared rays of wavelengths 2, 6, and 10 are infrared light emitting devices emitting infrared rays of the same second wavelength, 3, 7, and 11 emit infrared rays of the same third wavelength Infrared light emitting devices that emit infrared light, No. 4, No. 8, and No. 12 may be composed of an infrared light emitting device that emits infrared rays of the same fourth wavelength.

At this time, looking at the 5th light receiving element constituting the infrared receiving unit 203 , the 5th infrared light receiving element is emitted by the 3rd, 4th, 5th, 6th and 7th infrared light emitting elements of the first infrared transmitting unit 201 . It can be confirmed that infrared rays of the same wavelength emitted from the 3rd and 7th infrared light emitting devices are received.

The processing unit 110 may determine the touch coordinates of the object and/or the distance the object is separated from the screen 200 based on the amount of infrared light received from the infrared light receiving device compared to the amount of infrared light emitted from the infrared light emitting device. Therefore, the 5th light receiving element that receives the infrared rays emitted from the 3rd and 7th infrared light emitting devices of the same wavelength is the amount of light received compared to the sum of the light quantity emitted from the 3rd and 7th infrared light emitting devices, the touch coordinates of the object and / Alternatively, it is possible to determine the distance the object is separated from the screen 200 .

As described above, when the processing unit 110 receives the infrared rays emitted by two or more infrared light emitting devices from one infrared light receiving device, the touch coordinates of the object and/or the It is possible to determine the distance the object is separated from the screen 200 .

In addition, when one infrared light receiving element receives the infrared rays emitted by two infrared light emitting devices, the object is emitted from the 3rd and 7th infrared light emitting devices of the first infrared transmitting unit 201, and the first infrared receiving unit 203 When the object is located in a partial region where the infrared path of the third wavelength received by the fifth infrared light receiving element overlaps, the ratio of the measured infrared light quantity to the sum of the corresponding infrared light quantity may be determined to be 50% or less.

That is, in the touch panel 140, even in a state in which infrared rays of the same wavelength are mixed, the region in which the accuracy deterioration due to infrared interference is likely to occur is formed as a narrow region compared to the entire screen 200 region, so that the determination accuracy of the touch coordinates is improved. can be improved

In addition, the touch panel 140 accurately determines the touch coordinates of the object by determining the position of the object using two or more infrared wavelengths emitted from other infrared light emitting devices, rather than determining the position of the object with one infrared wavelength. Not only can it be done, but the touch position according to the movement of the object can be identified in detail.

In addition, according to the above bar, although it has been described that four infrared light emitting devices are configured as one light emitting group, the present invention is not limited thereto, and infrared light emitting devices included in one light emitting group such as 2, 3, 5, etc. They can be configured in a variety of ways.

Among the 12 infrared light emitting devices constituting the first infrared transmitter 201, four infrared light emitting devices are designated as one light emitting group according to the number order, but the number is not limited thereto, and various patterns and the number of light emitting devices are set. can be

In addition, referring to FIG. 2, the first infrared element unit includes 12 infrared light emitting elements and 12 infrared light receiving elements, and the second infrared element unit includes 8 infrared light emitting elements and 8 infrared light receiving elements. However, this is an example for explaining the technical features of the present invention, and the number of the light emitting device and the light receiving device may be variously configured according to the size of the touch panel.

As described above, when two or more of the infrared light emitting elements designated to be identified by one infrared light receiving element are configured to emit infrared rays of the same wavelength, the operation of processing infrared rays of the same wavelength is described, but the touch panel Reference numeral 140 is not limited thereto, and it is obvious that each of the infrared light emitting elements designated to be identified in one infrared light receiving element may be configured to emit infrared rays of different wavelengths.

In addition, the infrared light emitting device may be configured to output different phases even for infrared rays having the same wavelength. For example, when the 1st, 5th, and 9th infrared light emitting devices are configured to emit infrared rays of the same first wavelength, the phases of infrared rays such as π/2, π, 3π/2 are different from at least one light emitting device By configuring it to output, it can be configured so that infrared rays of the same wavelength can be identified.

Referring to the second infrared element unit, infrared rays emitted from one infrared light emitting element may be received and identified by one infrared light receiving element 1:1. Accordingly, in various embodiments, the infrared path between the first light emitting element and the first light receiving element of the second infrared element unit is the first infrared path, and the infrared path between the second light emitting element and the second light receiving element of the second infrared element unit is 2 It can be defined as the burn-infrared path.

However, the present invention is not limited thereto, and it is obvious that the second infrared element unit may also be configured to receive and identify infrared rays emitted from one infrared light emitting element in a plurality of infrared light receiving elements like the first infrared element unit.

As described above, one infrared light receiving element constituting the first infrared element unit may identify infrared rays emitted from a plurality of infrared light emitting elements based on configuration and setting information.

The processing unit 110 may determine the coordinates at which the object is located based on infrared information of the coordinates at which the object is located on the screen 200 and object sensing data of the infrared element unit, and may determine the distance the object is separated from the screen 200 .

Here, in relation to the infrared information of the coordinates of the object on the screen 200, the storage unit 120 of the electronic board 100 is the coordinate information set on the screen 200, the identification code of each infrared light receiving element and the infrared light receiving element An identification code for an infrared light emitting device designated to be identified for each, an infrared path therebetween, and at least some information of coordinates included in each of the infrared paths may be included as infrared information.

Here, the infrared path may be determined as an area including a plurality of coordinates based on the infrared wavelength and the amount of infrared light as shown in FIG. can be applied.

In addition, the infrared information is, for each of the coordinates set on the screen 200, an identification code of an infrared light emitting device that transmits infrared rays having coordinates as a path, and an infrared light emitting device that transmits infrared rays having coordinates as a path, and an identification code of an infrared light receiving device that receives, infrared rays Infrared type (eg, wavelength, phase, etc.) and amount of light emitted from each light emitting device, the amount of infrared light measured by the infrared light receiving device that receives infrared light in a state where there is no object on the screen (initial state), and the screen ( 200) may further include information about at least some of the amount of infrared light measured by the infrared light receiving device that receives infrared rays in a state where the object is located at specific coordinates on the image.

In addition, the infrared information is sensing data measured according to the state where the object is located on the screen 200, that is, an infrared light receiving element in which a change in the amount of infrared light received at a specific location where the object is located, and a change in the amount of light occurs Information such as an infrared light emitting device emitting the infrared ray, a change in the amount of light for each infrared in which a change in the amount of light is generated, and an amount of light measured before and after the position of an object may be stored as a mapping table.

The object sensing data of the infrared element unit includes infrared measurement data measured by each infrared light receiving element of the touch panel 140 in a state where the object is located at a specific position of the screen 200 , and the infrared measurement data includes each infrared light receiving element Infrared rays having a plurality of wavelengths measured in , and information related to light quantity may be included.

The processing unit 110 identifies a change in the wavelength and amount of infrared light in which a change in the amount of infrared light is generated, based on the infrared information and the object sensing data, and identifies an infrared light emitting device emitting the changed infrared light, the identified information and mapping Coordinates can be extracted based on the table.

In this case, the infrared transmitter of the touch panel 140 is configured to include infrared light emitting devices that emit different infrared rays having various characteristics so that infrared rays passing through the coordinates of the object are distinguished for writing, and various wavelengths at which changes occur According to the ratio of infrared rays of , the coordinates where the object is located can be precisely matched.

Therefore, the processing unit 110 also finely fluctuates the ratio of infrared rays of various conductors in which a change occurs in response to a minute movement of an object generated on the screen 200, or additionally checks infrared rays of a new wavelength in which a change occurs, And/or it is possible to accurately determine the position of the object by confirming that the infrared of a specific wavelength that has changed returns to the initial state.

If the position of the coordinates is determined according to the ratio of infrared rays of various wavelengths for which the change is confirmed with respect to the coordinates of the object located on the screen 200, the processing unit 110 determines the amount of light (or the amount of light) of the infrared rays of various wavelengths for which the change is confirmed. A distance of the object from the screen 200 may be determined based on the amount of change of .

3 is a diagram schematically illustrating a side configuration of an infrared touch panel according to an embodiment of the present invention.

FIG. 3 is a view schematically showing the left cut surface of the touch panel 140 of FIG. 2 cut from top to bottom. The first infrared transmitter 201 of the touch panel 140 may include an infrared transmitter PCB 313 and at least one infrared light emitting device 315 mounted on the infrared transmitter PCB 313 .

Here, the infrared transmitter PCB 313 is disposed inside the first bezel 301 to be perpendicular to the screen 200 . In addition, the first bezel 301 may be disposed in contact with the side surface of the screen 200 , and a portion thereof may be disposed to protrude toward the upper surface of the screen 200 . In addition, the infrared light emitting device 315 may be attached to a portion positioned higher than the screen 200 in the infrared transmitter PCB 313 so as to be horizontal with the screen 200 .

The first infrared receiver 303 may include an infrared receiver PCB 323 and at least one infrared light receiving element 325 and an infrared light receiving element 325 mounted on the infrared receiver PCB 323 .

Here, the infrared receiver PCB 323 may be disposed inside the second bezel 303 to be perpendicular to the screen 200 . In addition, the second bezel 303 may be disposed in contact with the side surface of the screen 200 , and a portion thereof may be disposed to protrude toward the upper surface of the screen 200 . In addition, the infrared light receiving element 325 may be attached to a portion located higher than the screen 200 in the infrared receiving unit PCB 323 so as to be horizontal with the screen 200 .

Here, the infrared light receiving element 325 for identifying various wavelengths may be configured to identify various ranges of infrared wavelengths in one light receiving element, or different or partially overlapping infrared wavelengths that can be identified. A plurality of infrared light-receiving elements, for example, an infrared light-receiving element of a first wavelength range, an infrared light-receiving element of a second wavelength range, and an infrared light-receiving element of a third wavelength range may be included. In this case, when a plurality of infrared light receiving elements are included, the plurality of infrared light receiving elements may be configured as one module.

The screen 200 may include a screen panel 305 on which the written content is displayed, and a protective layer 307 made of a glass film, synthetic resin, or the like to protect the screen panel 305 .

When writing is written through an object on the screen of the touch panel 140 based on the touch panel 140 of the above configuration, the processing unit 110 identifies the coordinates at which the object is located and the coordinates to move, and the identified By recognizing the shape of the written characters and the order in which they are written based on the coordinates and the movement of the coordinates, it is possible to determine which characters the written characters are. The processing unit 110 may implement the determined character as the written character in the same or similar manner and display it on the screen 200 .

Delicately and accurately realizing the user's writing through the touch panel 140 of the electronic board 100 according to various embodiments is based on the user's writing characteristics, for example, the shape of characters and/or figures, and the strength and weakness of the user. This is to display on the screen 200 by realizing the change in the writing feeling and the characteristics of the handwriting as it is.

In addition, the processing unit 110 implements the user's handwriting to analyze the letter form and the letter form of the neighboring letter among the letters of the content displayed on the screen 200, and when the identification of at least some of the letter and the neighboring letters is unclear Adjusts the thickness of the characters displayed on the screen 200 with reference to the shape and writing pattern of the characters stored in the database, and deletes parts displayed unnecessarily between neighboring characters to clearly show each neighboring character. You can control the display.

Hereinafter, an operation of changing the shape of characters displayed on the screen 200 or deleting some of them will be described in detail with reference to FIGS. 4A, 4B, and 4C.

4A, 4B, and 4C are diagrams illustrating an operation of displaying a writing identified by an infrared touch panel on a screen according to an embodiment of the present invention.

The processing unit 110 may determine the user's writing based on the amount of infrared light that is changed when the object approaches or comes into contact with the screen 200 compared to the amount of infrared light in the initial state of the infrared light emitting devices.

Referring to FIG. 4A , the processing unit 110 may implement the word 'electronic board' written by the user on the touch panel 140 and display it on the screen 200 . The processing unit 110 may implement the shape of coordinates identified according to the movement of the object, and check the characters matching the implemented shape through the database.

The processing unit 110 displays the 'electronic board', which is the content that the user's writing is implemented, on the screen 200 as shown in FIG. 4A, and the contents implemented based on the 'electronic board' identified for the corresponding 'electronic board' It is possible to store the type and character of the 'electronic blackboard' in the storage unit 120 as 'Korean' and 'electronic blackboard'.

In addition, the processing unit 110 determines that the user has started writing while the object is separated from the screen 200 by a specified distance in a state in which it does not touch the screen of the touch panel 140 , and receives the written characters through such an air touch. In the case of implementation, the letters may be implemented in a state in which unnecessary parts are connected between the letters, such as the letters 'electronic blackboard' shown in FIG. 4A.

In this case, the processing unit 110 may remove unnecessary portions connected between the letters as shown in FIG. 4B based on the letters identified in the database based on the implemented letters and the types of the implemented letters.

The processing unit 110 determines and deletes unnecessary parts of the characters by comparing at least some conditions among the shape of the characters checked through the database and the strokes and ratios of the strokes with the implemented characters, and then displays them on the screen 200 . can be printed out.

In addition, the processing unit 110 may determine the initial amount of infrared light emitted through the infrared transmitter of the touch panel 140 , for example, the amount of infrared light emitted by each of the infrared light emitting devices included in the infrared transmitter, and/or of the object. The height (d) (or thickness) of the air touch layer may be adjusted based on the light reception sensitivity of the infrared receiver for determining the air touch and writing.

According to an embodiment, the processing unit 110 determines the user's writing at the time when the air touch starts, and the point and/or line implemented according to the degree of proximity of the object to the screen 200, that is, the thickness of the character. (or thickness) can be controlled to be bold.

That is, when the user writes letters while touching the object on the screen 200 , the maximum thickness of the letters is the thickness determined when the object comes into contact with the screen 200 , and content can be implemented. In this case, the processing unit 110 may adjust the maximum thickness (or stroke thickness) of the letters when implementing the written letters by adjusting the height d of the air touch layer.

According to an embodiment, the light reception sensitivity of the infrared receiver is a change in the amount of infrared light for determining that the air touch of the object is started compared to the amount of infrared light in the initial state, and is determined according to the numerical value (or value) of the light receiving sensitivity, , by processing the amount of light measured by the infrared light receiving element in the processing unit 110, it is possible to determine the air touch start point according to the light receiving sensitivity.

For example, when the light receiving sensitivity is set to 10%, the processing unit 110 confirms that the amount of infrared light in the initial state measured by the infrared light receiving elements is reduced as the object approaches the screen 200 , and the infrared light in the initial state is reduced. If it is confirmed that the amount of light is reduced by 10%, it can be determined that the air touch has started.

In this case, the area from the position where the air touch starts to the surface of the screen 200 in the space on the screen may be defined as the air touch layer. The processing unit 110 may control the height d of the air touch layer by controlling the amount of infrared light emitted by the infrared light emitting devices and/or the light receiving sensitivity of the infrared light receiving device in the initial state.

The processing unit 110 may control the thickness of the implemented content as shown in FIG. 4B or 4C by controlling the height d of the air touch layer. In controlling the height d of the air touch layer and controlling the thickness of the written content, the processing unit 110 may control the thickness of the already implemented content.

5 is a flowchart of an operation of recognizing a writing on the electronic board and displaying it on the screen according to an embodiment of the present invention.

The infrared transmitter for infrared touch of the touch panel 140 of the electronic board 100 is configured to emit two or more infrared wavelengths having different paths, and the infrared receiver receives infrared rays having a difference in wavelength and uses the identified infrared rays. The position and movement of an object can be determined more accurately and delicately.

Hereinafter, an operation of displaying on the screen 200 by implementing the position of the object and the writing content through infrared rays in the electronic board 100 through the steps of FIG. 5 will be described in detail.

The touch panel 140 of the electronic board 100 may include an infrared transmitter that generates and emits infrared rays in order to recognize the touch coordinates of an object adjacent to the touch panel. Here, the infrared transmitter may include two or more infrared light emitting devices, and the two or more infrared light emitting devices may include at least two types of infrared light emitting devices.

Here, the infrared type may be divided into a plurality of types according to the wavelength and/or phase of the infrared light emitted from the infrared light emitting device.

Also, the touch panel 140 may include an infrared transmitter installed at a position corresponding to the infrared transmitter to receive at least a portion of infrared rays emitted from at least two types of infrared light emitting devices. Here, the infrared transmitter may include a plurality of infrared light receiving elements, and each of the plurality of infrared light receiving elements may be configured to receive two or more infrared rays of different types from at least some of the two or more infrared light emitting elements.

In step 501, the electronic board 100 checks infrared sensing data in which the amount of infrared light is measured as an initial state in which an object is not detected through a plurality of infrared light receiving elements configured to identify at least two types of infrared rays.

All of the plurality of infrared light emitting elements included in the infrared transmitter may be set to emit infrared light of a specified brightness, or may be set to emit infrared light of different brightness according to the characteristics of the infrared light emitting element.

The database of the electronic board 100, the identification code of each infrared light emitting device, the type of infrared each infrared light emitting device emits, information about the identification code of the infrared light receiving device designated to receive the infrared rays emitted for each of the infrared light emitting device may include.

The electronic board 100 identifies the type of infrared light received by each of the infrared light receiving elements, identifies the infrared light emitting element that emits infrared light based on the database, and the brightness set to emit from each infrared light emitting element and the infrared light receiving element It is possible to record the brightness received from the , and generate sensing data of the initial state of the touch panel 140 based on these.

The electronic board 100 may be set to update the sensing data in the initial state at a time when it is confirmed that the object recognized by the touch panel 140 is removed or at a specified time interval.

For example, when the electronic board 100 confirms that the amount of infrared light emitted by a specific infrared light emitting device has decreased in the operation of updating the sensing data of the earthenware state, the infrared light receiving element receiving the corresponding infrared light based on this is received You can control the sensitivity. At this time, the electronic board 100 can adjust the light receiving sensitivity with respect to the infrared light emitting device that emits the corresponding infrared rays.

In step 503, the electronic board 100 checks two or more infrared light receiving elements that sense the change in the amount of light when the change in the amount of light is confirmed in at least a part of the amount of infrared light in the initial state based on the value of the infrared sensing data.

When a change in the amount of infrared light is confirmed while the sensing data of the initial state is maintained, the electronic board 100 checks the infrared light receiving elements that sense the change in the amount of light, and determines the air touch of the object based on the change in the amount of infrared light, It may be determined that the user's writing begins.

For example, the electronic board 100 determines that the object approaches the screen 200 when the amount of infrared light received by the infrared light receiving element decreases to less than or equal to the specified light amount based on the set light receiving sensitivity, and the user's writing can be determined to have begun.

For example, when the average light amount of the infrared rays in which the light quantity is changed among the infrared rays received by each of the at least one infrared light receiving element is reduced to a specified value, the electronic board 100 receives the infrared rays received by each of the at least one infrared light receiving element. When the ratio of the infrared rays with the change in the amount of light in the middle satisfies a specific value, it may be determined that the user's writing has started.

In step 505, the electronic board 100 checks the path of two or more infrared rays and infrared rays having different types identified in each of the two or more infrared light receiving elements.

The electronic board 100 identifies each type of infrared light in which the amount of light is changed in each of the infrared light receiving elements for which the change in the amount of infrared light has been confirmed, and the infrared light emitting device that emits the corresponding infrared based on the identified infrared type can be identified.

The electronic board 100 may confirm an infrared path between the identified infrared light emitting elements and the infrared light receiving element. The electronic board 100 may check the infrared path of the infrared light in which the amount of light is changed with respect to all of the plurality of infrared light receiving elements for which the change in the amount of infrared light is confirmed.

In step 507, the electronic board 100 determines the touch coordinates touched by the object among the coordinates in the area where the paths intersect based on the area where the paths of two or more different types of infrared intersect each other and the amount of change in the amount of infrared light. .

The electronic board 100 may check the coordinates of the area where the paths of the infrared rays confirmed that the amount of light has changed are intersected. At this time, if the size of the area where the paths of the infrared rays intersect or the coordinates included in the area is more than the specified number, the infrared rays with the changed light quantity are listed in the order of the largest change in the light quantity, and the paths of the infrared rays with the large change in the quantity of light are intersected. The touch coordinates of the object are determined by giving priority to the coordinates of the area, and a plurality of touch coordinates may be determined as coordinates included in an area of a specified size or coordinates within a specified number.

For example, if the size of the area where the paths of infrared rays intersect is larger than the size of the unit area (eg, the thickness of dots or letters) for the thickness of the letters implemented with respect to the touch coordinates, the electronic board 100 is larger. As described above, by resetting the area for determining the touch coordinates of the object based on the intersecting area of the high-priority infrared path, the size of the area where the paths of the infrared rays intersect can be controlled.

The electronic board 100 determines the touch coordinates of the object, the identification code of the infrared light receiving element that has received the infrared light having a changed amount of light, and the identification code of the emitted infrared light emitting element. Compare the identified information such as the infrared path between them, the area where the infrared paths intersect, the amount of change in the amount of light of each infrared with the amount of light changed, and the priority of the infrared according to the amount of change with the mapping table in the database, and match the touch coordinates to the object It can be determined by the touch coordinates of

The electronic board 100 may end the operation of FIG. 5 when the operation of step 507 is performed.

In addition, although not shown in FIG. 5 , according to various embodiments, the electronic board 100 implements coordinates identified based on a contact (eg, touch) or proximity (eg, air touch) of an object, and generates Content may be displayed on the screen 200 .

In addition, the electronic board 100 may match letters, characters, symbols, figures, etc. based on the shape of coordinates identified based on contact (eg, touch) or proximity (eg, air touch) of an object.

The electronic board 100 extracts matching characters by comparing the movement of coordinates identified in the user's writing and information such as the shape, stroke, and writing order of characters stored in the database, and matches the extracted characters to the implemented content It can be saved as a character.

At this time, if the characters do not match with respect to the content implemented in the operation of implementing the user's writing, or when two or more characters are implemented in a connected state, the electronic board 100 adjusts the amount of light of at least a portion of the infrared light emitting device, and / Alternatively, the recognition rate of a nearby object may be improved by adjusting the light receiving sensitivity of the infrared light receiving element.

When adjusting the light quantity of at least a portion of the infrared light emitting element and/or adjusting the light receiving sensitivity of the infrared light receiving element, the height d of the air touch layer of the touch panel 140 is changed, and thus the thickness of the implemented characters is changed. By being changed, the recognition rate can be improved based on the characters implemented with an appropriate thickness.

According to various embodiments of the present invention, in determining the touch coordinates of an object touching the touch panel by configuring the wavelengths, phases, etc. of the infrared rays emitted by the infrared light emitting devices constituting the infrared touch panel differently from each other, determination due to infrared interference It is possible to reduce the error and improve the accuracy of the operation of determining the touch coordinates.

According to various embodiments of the present invention, by configuring the infrared light receiving elements to distinguish the wavelength, phase, etc. of the infrared rays emitted by the infrared light emitting elements, the infrared discrimination power is improved, and thus, the coordinate identification accuracy of the writing can be improved.

According to various embodiments of the present disclosure, even if a problem occurs in the infrared light emitting device of some wavelengths by differentiating the wavelength and phase of the infrared rays, the performance of determining the touch coordinates of the object is rapidly reduced by supplementing the infrared light emitting devices of other wavelengths. prevent, and thus improve user satisfaction.

According to various embodiments of the present disclosure, by accurately determining the touch coordinates of an object through infrared rays of various wavelengths and phases, uniformity in the implementation of characters can be improved, and thus, a user's natural handwriting can be induced.

According to the detailed description of the present invention, the functions of various embodiments described as being performed by the electronic board 100 are operations processed through the processing unit 110 of the electronic board 100 with the components of the electronic board 100 and It can be carried out in organic connection.

As described above, although the embodiments have been described with reference to the limited drawings, a person skilled in the art may apply various technical modifications and variations based on the above.

For example, the described techniques are performed in a different order than the described method, and/or the described components of the system, structure, apparatus, circuit, etc. are combined or combined in a different form than the described method, or other components Or substituted or substituted by equivalents may achieve an appropriate result.

Therefore, other implementations, other embodiments, and equivalents to the claims should also be included within the scope of the following claims.

100: electronic board
110: processing unit
120: storage
130: communication department
140: touch panel

Claims (8)

In the electronic board with improved handwriting recognition of infrared touch panel,
screen,
At one side of the screen, including two or more infrared light emitting devices for generating and emitting infrared rays for recognizing touch coordinates of an object adjacent to the screen, wherein the two or more infrared light emitting devices include at least two types of infrared light emitting devices Consisting of, an infrared transmitter, and
On the other side of the screen, a plurality of infrared light receiving elements for receiving at least a portion of the infrared rays emitted from the at least two types of infrared light emitting elements, wherein each of the plurality of infrared light emitting elements is one of two or more infrared light emitting elements the infrared touch panel configured to include an infrared receiver configured to receive two or more infrared rays of different types from at least some; and
Through the plurality of infrared light receiving elements configured to receive the at least two types of infrared rays, infrared sensing data in which the amount of infrared light is measured as an initial state in which the object is not detected is checked, and the initial state based on the value of the infrared sensing data When a change in the amount of light according to the object close to the screen is confirmed in at least a part of the amount of infrared light of Identify two or more different infrared rays and a path of the infrared rays, and among the coordinates in a region where the paths of the two or more different types of infrared rays intersect each other and the region where the paths intersect based on the amount of change in the amount of infrared light Including; a processing unit that processes to determine the touch coordinates of the object;
Each of the plurality of infrared light receiving elements receives infrared rays emitted from two or more infrared light emitting elements, and the processing unit converts the received infrared rays based on a difference in at least part of wavelengths and phases of the received infrared rays into a plurality of infrared rays. Determined by infrared types,
The processing unit, based on the received infrared rays identified as the plurality of infrared types, among the infrared rays received by each of the two or more infrared light receiving elements, the infrared rays in which the amount of light is changed, the change in the amount of light identifies the infrared light emitting devices that emit the change in the amount of light for each of the generated infrared rays, and the infrared rays in which the change in the amount of light is generated, and confirms the path of the infrared rays in which the change in the amount of light is generated,
The processing unit determines, as the touch coordinates, coordinates in a region where the path intersects among coordinates of a mapping table matching a ratio of infrared rays generated by a change in the amount of light as the touch coordinates;
When the number of coordinates in the region where the path intersects is greater than the specified number, the specified number of coordinates is determined as the touch coordinates by giving preference to the coordinates of the region where the path of infrared rays with a large amount of change in the amount of infrared light intersects. An electronic blackboard with improved handwriting recognition on the panel. According to claim 1,
The processing unit, when the characters identified based on the determined touch coordinates are two or more connected characters or cannot identify the characters, adjust the amount of light of at least a portion of the at least two types of infrared light emitting devices to be drawn by the touch coordinates is an electronic board with improved handwriting recognition of an infrared touch panel, characterized in that it corrects the recognition rate of characters. According to claim 1,
The processing unit, if the characters identified based on the determined touch coordinates are two or more connected characters or if the characters cannot be identified, the light reception sensitivity to the infrared light quantity, which is a criterion for determining the start of writing after recognizing the object An electronic board with improved handwriting recognition of an infrared touch panel, characterized in that by adjusting the recognition rate of characters drawn by the touch coordinates. delete According to claim 1,
The processing unit, when receiving the same type of infrared rays emitted by two or more infrared light emitting elements from each of the plurality of infrared light receiving elements, determine the change in the infrared light quantity based on the sum of the infrared light quantity of the same type Electronic blackboard with improved handwriting recognition of infrared touch panel, characterized in that. According to claim 1,
When the size of the area where the path intersects is larger than the unit area size of the content displayed on the screen based on the determined touch coordinates, the processor determines the priority of the infrared path based on the amount of change in the amount of infrared light and resetting the size of the area where the path intersects based on the intersecting area of the infrared path reflecting the priority of the infrared path, the electronic board with improved writing recognition of the infrared touch panel. According to claim 1,
The processing unit, by adjusting the light amount of at least a part of the at least two types of infrared light emitting devices or by adjusting the light reception sensitivity to the infrared light amount, which is a criterion for determining the start of writing after recognizing the object, to the touch coordinates An electronic blackboard with improved writing recognition of an infrared touch panel, characterized in that it controls the maximum thickness of the points and lines displayed on the screen based on it. In the operating method of the electronic board with improved writing recognition of the infrared touch panel,
(a) checking infrared sensing data in which an amount of infrared light is measured as an initial state in which an object is not detected through a plurality of infrared light receiving elements configured to receive at least two types of infrared rays;
(b) when a change in the amount of light according to an object close to the screen is confirmed in at least a part of the amount of infrared light in the initial state based on the value of the infrared sensing data, identifying two or more infrared light receiving elements that sense the change in the amount of light;
(c) checking the paths of two or more infrared rays and infrared rays having different types identified through each of the two or more infrared light receiving elements; and (d) determining the touch coordinates of the object from among the coordinates in the region where the paths intersect based on the area where the paths of the two or more different types of infrared rays intersect each other and the amount of change in the amount of infrared light; including,
Each of the plurality of infrared light receiving elements receives infrared rays emitted from two or more infrared light emitting elements, and the electronic board collects the received infrared rays based on a difference of at least a part of the wavelength and phase of the received infrared rays. determined by the infrared types of
In the step (c), the electronic board, based on the received infrared rays identified as the plurality of infrared types, a change in the amount of light among the infrared rays received by each of the two or more infrared light receiving elements occurs Infrared light emitting devices that emit infrared rays, the change in the amount of light for each of the infrared rays in which the change in the amount of light is generated, and the infrared in which the change in the amount of light is generated are identified, and the path of the infrared in which the change in the amount of light is generated check,
In the step (d), the electronic board determines, as the touch coordinates, coordinates in the area where the path intersects among the coordinates of the mapping table matching the ratio of the infrared rays in which the change in the amount of light is generated, as the touch coordinates,
When the number of coordinates in the area where the path intersects is greater than the specified number, the specified number of coordinates is determined as the touch coordinates by giving preference to the coordinates of the area where the paths of infrared rays intersect with a large amount of change in the amount of infrared light as the touch coordinates. The operation method of the electronic board with improved handwriting recognition of the panel.

Images