WO2019212109A1

WO2019212109A1 - Infrared touch sensor device having improved writing recognition

Info

Publication number: WO2019212109A1
Application number: PCT/KR2018/012588
Authority: WO
Inventors: 구기도
Original assignee: 주식회사 아하정보통신
Priority date: 2018-05-03
Filing date: 2018-10-23
Publication date: 2019-11-07
Also published as: KR101890695B1

Abstract

The purpose of the present invention is to provide an infrared touch sensor device having improved writing recognition, capable of properly recognizing writing even in a part in which writing is not recognized because of the physical size of an infrared sensor. To this end, provided is an infrared touch sensor device having an improved writing recognition rate by preventing characters displayed on a touch panel from being displayed in succession if one character and another character close thereto are displayed in succession such that writing recognition is uncertain, when a user of an electronic bulletin board touches the touch panel so as to write on the board.

Description

Infrared touch sensor device with improved writing recognition

The present invention relates to an infrared touch sensor device that improves the recognition of the writing, and more particularly, it is possible to recognize the writing even in a part where the writing is not recognized due to the physical size of the infrared sensor, and when the letters adjacent to each other follow. The present invention relates to an infrared touch sensor device for improving the following phenomenon and properly recognizing the writing even when a part of the touch panel of the copyboard is convex.

1 is a view showing an electronic blackboard for determining a writing position using a conventional infrared touch sensor.

In the conventional method of determining the writing position by touching the touch panel 300 using infrared rays, the infrared rays emitted from the infrared light emitting elements of the

infrared transmitters

101 and 201 are one-to-one with the infrared sensors of the

infrared receivers

102 and 202. It is detected as a response to determine the writing position.

Here, the hatched portion means the portion to which the infrared rays are irradiated (hereinafter the same).

In the related art, the area in which the infrared light emitted from the infrared light emitting device can be detected by the infrared light sensor is limited by the physical size of the infrared light emitting device and the infrared light sensor. Therefore, there is a problem that the writing position cannot be determined in the writing position discrimination region (indicated in black) in which infrared light is not transmitted from the infrared light emitting element to the infrared sensor.

In addition, in the conventional method of determining the writing position using an infrared touch sensor, when writing on the electronic blackboard with the touch pen 10 or a finger, neighboring letters are often displayed to be connected to each other, and thus the writing is difficult to identify. Occurred a lot.

In addition, in the copyboard manufacturing process, the glass layer, which is a protective layer of the touch panel, is often formed to be convex due to defects in the manufacturing process.

If such a defect occurs, it may be difficult to determine the writing position in the region.

Accordingly, there is a need for an apparatus and method for improving writing recognition of an electronic blackboard that can solve the above problems.

It is an object of the present invention to provide an infrared touch sensor with improved writing recognition that can correctly recognize writing even in a part where writing is not recognized due to the physical size of the infrared touch sensor.

An object of the present invention is to provide an infrared touch sensor that improves the writing recognition rate by improving a phenomenon which is followed when neighboring letters displayed on the touch panel of the copyboard are continued.

An object of the present invention is to provide an infrared touch sensor that can properly recognize the writing even when a part of the touch panel of the copyboard is convex.

(Patent Document) Korean Patent Registration No. 10-1808523 (Optical Touch Input Device and Its Driving Method)

According to the present invention, when a user of the copyboard makes a writing by touching a touch panel, another letter adjacent to one letter is displayed to be connected to each other to prevent letters displayed on the touch panel from being connected to each other when the writing recognition is uncertain. An infrared touch sensor device having improved writing recognition rate, comprising: an infrared transmitter including at least one infrared light emitting element for generating and irradiating infrared rays for recognizing a touch portion of a touch panel; and at a position corresponding to the infrared transmitter An infrared receiver including one or more infrared sensors installed to receive the infrared rays; And setting an operating range of the infrared infrared receiver to generate writing position information according to the amount of light for detecting infrared light emitted from the specific infrared light emitting device when the specific infrared light emitting device of the infrared transmitting unit is operated, and within the set operating range. By operating the infrared sensor in order to recognize the writing position, and analyzes the writing displayed on the touch panel to recognize the writing position in the infrared detection sensor when one letter and the neighboring letters are displayed to be connected to each other. A control unit for improving the writing recognition rate by adjusting the amount of infrared light that can be provided is provided with an infrared touch sensor device that improves the writing recognition rate.

Herein, when the protective layer of the touch panel is convex, the controller measures the amount of infrared light detected by the infrared receiver through a 1: 1 correspondence between the infrared light emitting element and the infrared sensor. The convex portion of the protective layer may be determined to be convex, and the infrared light sensor may recognize the writing position by the infrared sensor corresponding to the position of the convex portion to display the writing on the convex portion. .

Here, the controller recognizes a gesture displayed by the user on the touch panel and performs a 1: N (N is a natural number of 1 or more) correspondence between the specific infrared light emitting device and one or more infrared sensors according to the gesture. It may be characterized by setting the number of operations of the infrared sensor for generating the writing position information corresponding to the specific infrared light emitting device.

The controller may recognize a gesture displayed by the user on the touch panel and adjust the amount of infrared light to recognize a writing position in the infrared sensor according to the gesture.

Herein, the controller analyzes the writing content in which the one letter and the neighboring letter are connected to each other through machine learning, and recognizes the writing position in the infrared sensor when the neighboring letters are connected to each other according to the analyzed result. It may be characterized in that for controlling the extent to which the neighboring letters are continued by adjusting the amount of infrared light.

The present invention has the effect that can be controlled to finely control the area of the writing position without replacing the infrared sensor.

In addition, the present invention has an effect of improving the writing recognition rate by preventing the subsequent phenomena of neighboring letters in the case where the letters adjacent to the writing content is connected to each other is difficult to recognize.

In addition, the present invention has an effect that can be improved when a part of the touch panel is convex due to the process of the electronic blackboard is convex and the writing recognition in the corresponding part is unclear.

1 is a view showing an electronic blackboard for determining a writing position using a conventional infrared sensor.

2 is a diagram illustrating a method of determining a writing position using one infrared light emitting device and a plurality of infrared sensors according to an embodiment of the present invention.

3 is a view showing a reduction in an area in which writing position is not determined when using one infrared light emitting device and a plurality of infrared sensors as an embodiment of the present invention.

4 is a diagram illustrating a method of improving a writing recognition rate by adjusting an amount of infrared light detected by an infrared sensor according to an embodiment of the present invention.

5 is a diagram illustrating distinguishing neighboring letters by adjusting an amount of infrared light detected by an infrared sensor according to an embodiment of the present invention.

FIG. 6 is a diagram illustrating detecting a convex part by adjusting an amount of infrared light to recognize a writing position in an infrared sensor when measuring flatness of a touch panel according to one embodiment of the present invention. .

FIG. 7 is a diagram illustrating adjusting an amount of infrared light capable of recognizing a writing position in a corresponding part in order to improve the writing recognition rate of a region corresponding to a convex part of the touch panel according to one embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail with reference to the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms.

In this specification, the embodiments are provided so that the disclosure of the present invention may be completed and the scope of the present invention may be completely provided to those skilled in the art.

And the present invention is only defined by the scope of the claims.

Thus, in some embodiments, well known components, well known operations, and well known techniques are not described in detail in order to avoid obscuring the present invention.

In addition, the same reference numerals throughout the specification refer to the same components, and the terminology (discussed) used herein is for the purpose of describing the embodiments are not intended to limit the invention.

As used herein, the singular forms "a", "an" and "the" include plural unless the context clearly dictates otherwise, and the elements and acts referred to as 'comprises' or 'do' not exclude the presence or addition of one or more other components and acts. .

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art.

In addition, the terms defined in the commonly used dictionary are not ideally or excessively interpreted unless they are defined.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

In the present invention, the writing position is determined using one infrared light emitting element and a plurality of infrared sensing sensors, rather than determining the writing position using one conventional infrared light emitting element and one infrared detecting sensor.

As shown in FIG. 2, a plurality of infrared detection sensors of the infrared receiver 102 emit infrared light emitted from one infrared light emitting element (the sixth infrared light emitting element) of the infrared transmitter 101 formed in the vertical direction of the touch panel. If the writing position is determined by detecting infrared rays in the fourth, fifth, sixth, seventh, and eighth), the writing area that cannot be detected can be reduced in the method of detecting the writing position through one-to-one correspondence.

That is, if a plurality of infrared detection sensors for detecting infrared light emitted from one infrared light emitting device are set and a plurality of infrared detection sensors are sequentially operated, the infrared light emitted from the infrared light emitting device is detected to determine the writing position. Infrared rays detected by the sensor detect not only infrared light emitting devices located in the vertical or horizontal direction but also infrared light emitted from the infrared light emitting devices located in the oblique direction to determine the writing position. Compared to determining the writing position by sensing, it is possible to greatly reduce the writing position discrimination area (marked in black).

As shown in FIG. 2, in the area around the infrared light emitting device (ie, the lower area of the touch panel), all areas where the writing position is not detected (parts shown in black) are detected in a one-to-one correspondence. Able to know.

In Fig. 2, the hatched bars indicate areas where the writing position can be recognized by the infrared sensor, and black parts indicate areas where the writing position cannot be recognized by the infrared sensor.

In FIG. 2, a region (shown in black) where a writing position is not detected is displayed in the periphery (ie, the upper region of the touch panel) of the infrared receiver 102, which is the case when one infrared light emitting device is used. The writing position is not detected in the vicinity of the infrared light sensor corresponding to the infrared light emitting element, and in the case where the writing position is not detected when using the method of the present invention described above in all infrared light emitting elements as shown in FIG. It can be seen that the writing position is detected in all except for the portion around the infrared sensor of the infrared receiver 102).

The control unit of the infrared touch sensor device having improved writing recognition rate according to the present invention may be configured according to the amount of light for detecting infrared light emitted from a specific infrared light emitting device when the specific infrared light emitting device of the infrared transmitting unit 101 operates. Sets the operating range of the infrared receiver to detect infrared and generate writing position information.

Here, the control unit of the infrared touch sensor device that improves the writing recognition rate of the present invention, when setting the operating range of the infrared receiver, determines the writing position with the degree that the corresponding infrared ray is blocked by using the infrared light emitted from a specific infrared light emitting element. In this case, the number of infrared detection sensors for receiving infrared rays greater than the amount of light that the corresponding infrared rays are blocked is set as an operating range of the infrared receiver.

For example, if the infrared detection sensor is set to recognize the writing position when 20% or more of the total amount of infrared light emitted from the infrared light emitting device is blocked, at least 80% of the total light amount of infrared light emitted from the infrared light emitting device. Infrared detection sensors that can receive the amount of infrared light of the infrared receiver set the operating range.

Here, the operating range of the infrared sensor refers to the number of infrared sensor that can determine the writing position by detecting the infrared light emitted from the infrared light emitting device.

After setting the operating range of the infrared receiver, the controller sequentially operates the infrared sensor 100 within the set operating range to recognize the writing position.

Here, the control unit recognizes a gesture displayed by the user on the touch panel, and according to the gesture, 1: N (N is a natural number of 1 or more) corresponding to the specific infrared light emitting device and one or more infrared sensors, through the infrared light of the specific infrared light emitting device. The number of operations of the infrared sensor that generates writing position information can be set.

That is, the infrared touch sensor device having improved writing recognition rate according to the present invention can be used in response to a gesture of a user even when the physical size of the infrared light emitting device and the infrared sensor is large. The number can be adjusted so that the writing position can be set finer without replacing the physical sensors.

When determining the writing position using infrared rays, the size or position of the writing can be finely adjusted according to the amount of light detected by the infrared sensor 1002 of the infrared light emitted from the infrared light emitting device 1001.

When writing to the touch panel 300 through the touch pen 10, the infrared light emitted from the infrared light emitting device 1001 is blocked by the touch pen 10 so that the infrared sensor 1002 does not detect it.

When the infrared light emitted from the infrared light emitting device 1001 is not detected by the infrared light sensor 1002, the writing position may be determined using the position of the infrared light emitting device 1001 and the position of the infrared light sensor 1002. Can be.

In the present invention, the writing position may be determined using the identification number (identification position) of the infrared light emitting device 1001 of the

infrared transmitting unit

101 and 201 and the infrared sensor 100 of the

infrared receiving unit

102 and 202.

Here, the size and position of the writing can be more precisely controlled according to the amount of infrared light detected by the infrared sensor 1002.

For example, when 20% of the amount of infrared light emitted from the infrared light emitting device 1001 is blocked, the writing position can be recognized, and 40% of the amount of infrared light emitted from the infrared light emitting device 1001 is blocked. The writing position can be recognized in the case where the writing position can be recognized when 60% of the amount of infrared light emitted from the infrared light emitting device 1001 is blocked.

4A shows a case of controlling the writing position when 20% of the infrared light is blocked from the total amount of infrared light emitted from the infrared light emitting device 1001, and B is the infrared light emitting device 1001. When the 40% of the infrared light is blocked from the total amount of the irradiated infrared light is shown to control the writing position is determined, C is 60% of the infrared light from the total amount of infrared light emitted from the infrared light emitting device (1001). If the control is to determine the writing position when the block is shown.

In the above example, in the case of A, the writing position is displayed from the ① area of the touch panel and the writing position is displayed while the touch pen 10 touches the touch panel 300. Thus, in the case of A, writing is displayed in the

areas

①, ②, ③.

In the case of B, the writing position is displayed from the ② area of the touch panel, and the writing position is displayed while the touch pen 10 touches the touch panel 300. Therefore, in the case of B, writing is displayed in the

areas

② and ③.

In the case of C, the writing position is displayed from the ③ area of the touch panel and the writing position is displayed while the touch pen 10 touches the touch panel 300. Therefore, in the case of B, the writing is displayed only in the ③ area.

By adjusting the amount of infrared light to determine the writing position in the infrared sensor 1002 through the above example can be more precisely control the position of the writing, and can also control the size and thickness of the writing.

In the above example, in the case of A, the size of the writing is largest and the thickness of the letters is also displayed in bold. In this case, the letters are displayed to be continued between neighboring letters, so that it may be difficult to distinguish the neighboring letters.

In the above example, in the case of C, the size of the writing is displayed the smallest and the thickness of the letter is also displayed thinly. In this case, the letters are not displayed to be continued between neighboring letters, so that it is easy to distinguish the neighboring letters.

In addition, the controller of the infrared touch sensor device having improved writing recognition rate of the present invention may recognize the gesture displayed by the user on the touch panel and adjust the amount of infrared light detected by the infrared sensor 1002 according to the gesture.

5 (a) shows a case in which neighboring letters are displayed to be connected to each other, and FIG. 5 (b) shows a case in which the adjacent letters are not connected by adjusting an amount of infrared light that can recognize a writing position in the infrared sensor according to the present invention. It is.

As described with reference to FIG. 4, when the neighboring letters are displayed to be connected to each other among the contents written on the touch panel, the controller of the present invention may recognize the writing position in the infrared sensor 100 so that the neighboring letters are not connected to each other. By adjusting the amount of infrared light can be controlled to finer the size and position of the writing.

That is, when the writing position is determined by the infrared detecting sensor 1002, the blocking amount of the amount of infrared light that can recognize the writing position is increased to reduce the size of the writing and the touch pen 10 is in contact with the touch panel 300. Only if the writing position is recognized.

In addition, the controller of the infrared touch sensor device having improved writing recognition rate according to the present invention stores and analyzes the writing contents to be written on the touch panel, and analyzes the writing contents in which one letter and neighboring letters are connected to each other through machine learning. And, when the letters adjacent to each other according to the analysis results, the infrared sensor 1002 can control the amount of infrared light that can recognize the writing position to control the extent to which the letters adjacent.

In the electronic blackboard manufacturing process, the protective layer 310 formed of glass, which is a protective layer of the display unit 320, is often convex due to defects in the manufacturing process.

The defects of the convex portion S are frequently generated at the center of the touch panel 300.

If a part of the touch panel is formed convexly, the amount of infrared light is blocked by the convex part in the corresponding area, and the writing position is not recognized properly.

Therefore, when the protective layer 310 of the touch panel is convex, the controller of the present invention senses the

infrared receivers

102 and 202 by 1: 1 correspondence between the infrared light emitting device 1001 and the infrared sensor 1002. The convex portion S in which the protective layer 310 is convex is determined by measuring the amount of infrared light. In addition, even when the touch pen 10 or the finger is written on the convex portion S by adjusting the amount of infrared light that can recognize the writing position in the infrared detection sensor 1002 corresponding to the position of the convex portion S, The writing position is recognized so that the writing is displayed properly.

When the convex portion S is formed as described in FIG. 6, as shown in FIG. 7, a large portion of the total amount of infrared light emitted from the infrared light emitting device 1001 is blocked.

For example, D is 60% of the total amount of infrared light emitted from the infrared light emitting device 1001 and E is 20%. If the reference for determining the writing position is set to 60% of the infrared light amount, the convex portion is blocked. In (S) it is always recognized as being a writing. Therefore, when the convex portion S is present, the controller calculates the amount of infrared light blocked by the convex portion S and sets it as the basic light quantity.

Thereafter, the controller calculates a light quantity value enough to recognize the writing position in addition to the basic light quantity, and sets it as a convex writing recognition recognition quantity value capable of recognizing the writing position of the convex portion S in addition to the basic light quantity.

As shown in FIG. 7, an additional amount of infrared ray shielding light amount is required to recognize the writing position of the convex portion S, so that the convex portion recognition light quantity value is 80% of D + E.

That is, the writing position is recognized when 60% of infrared rays are blocked except for the convex portion S of the touch panel 300, and the writing position is recognized only when 80% of infrared rays are blocked at the convex portion S. Set to Recognize.

That is, the controller measures the amount of infrared light detected by the infrared receiver 102 through a 1: 1 correspondence between the infrared light emitting device 1001 and the infrared sensor 1002 to form a convex portion in which the protective layer 310 is convex ( S) may be determined and the writing may be displayed on the convex portion S by adjusting the amount of infrared light detected by the infrared sensor 1002 which generates writing position information corresponding to the convex portion S. FIG.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Of course, it is obvious that such changes will fall within the scope of the claims.

The present invention can correctly recognize the writing even in the part where the writing is not recognized due to the physical size of the infrared touch sensor, and improves the phenomenon that follows when the letters displayed on the touch panel of the copyboard, the touch of the copyboard There is also industrial applicability to provide infrared touch sensors with improved recognition of writing, even when some panels are convex.

Claims

When the user of the copyboard makes a writing by touching the touch panel, the letters on the touch panel are prevented from being displayed next to each other when the writing recognition is uncertain because other letters adjacent to one letter are displayed next to each other. In the infrared touch sensor device is improved,

An infrared ray transmitting unit including one or more infrared light emitting elements for generating and irradiating infrared rays for recognizing touch portions of the touch panel;

An infrared receiver installed at a position corresponding to the infrared transmitter and including at least one infrared sensor configured to receive the infrared light; And

In case that the specific infrared light emitting element of the infrared transmitting unit is operated, the operating range of the infrared receiver which generates writing position information according to the detected light amount of the infrared rays irradiated from the specific infrared light emitting element is set, and is within the set operating range. By operating the infrared sensor in order to recognize the writing position, by analyzing the writing displayed on the touch panel, if one letter and the neighboring letters are displayed to be connected to each other, the infrared writing sensor can recognize the writing position A controller for adjusting the amount of infrared light to improve the writing recognition rate;

Infrared touch sensor device that improves the writing recognition rate comprising a.
The method according to claim 1,

The control unit, when the protective layer of the touch panel is formed convex,

By measuring the amount of the infrared light detected by the infrared receiver through a 1: 1 correspondence between the infrared light emitting element and the infrared sensor, it determines the convex portion in which the protective layer is convex, and corresponds to the position of the convex portion. Infrared touch sensor device to improve the writing recognition rate, characterized in that for displaying the writing on the convex portion by adjusting the amount of infrared light to recognize the writing position in the infrared sensor.
The method according to claim 1,

The controller recognizes a gesture displayed by the user on the touch panel, and responds to the specific infrared light through 1: N (N is one or more natural numbers) between the specific infrared light emitting device and one or more infrared sensors according to the gesture. An infrared touch sensor device with improved writing recognition rate, characterized in that for setting the operation number of the infrared sensor for generating writing position information corresponding to the light emitting device.
The method according to claim 1,

The control unit recognizes a gesture displayed on the touch panel by the user and adjusts the amount of infrared light to recognize the writing position by the infrared sensor according to the gesture, the infrared touch sensor device to improve the recognition rate of the writing.
The method according to claim 1,

The controller analyzes the writing content in which the one letter and the neighboring letter are connected to each other through machine learning, and recognizes the writing position in the infrared sensor when the neighboring letters are connected to each other according to the analyzed result. Infrared touch sensor device to improve the recognition rate of the writing, characterized in that for controlling the extent of the adjacent letters by adjusting the amount of infrared light.
The method according to claim 1,

The control unit recognizes a gesture displayed on the touch panel by the user and adjusts the amount of infrared light to recognize the writing position by the infrared sensor according to the gesture, the infrared touch sensor device to improve the recognition rate of the writing.