KR101359731B1 - System for recognizing touch-point using mirror - Google Patents

Abstract

The present invention relates to a touch recognition system using a reflection unit capable of precise multi-touch recognition by analyzing the infrared signal directly received during the touch recognition using the infrared camera and the infrared signal reflected through the reflection unit to calculate a position.
The present invention provides a touch recognition system for recognizing touch point coordinates of a screen through an infrared camera, comprising: an image controller (200) for outputting an image signal; An image output unit 110 for processing the image signal output from the image control unit 200 and outputting the image signal to the screen 100; An infrared pen 120 having a light emitter to emit infrared light at one end thereof; A first infrared camera unit 140 installed to receive infrared light emitted from the infrared pen 120; A first reflecting unit (160) installed at one side of the first infrared camera unit (140) to reflect the infrared rays emitted by the infrared pen (120) and to receive the light from the first infrared camera unit (140); The determination unit 181 determines that the infrared pen 120 is detected when the output signal level of the first infrared camera unit 140 is higher than the upper reference signal level, and the infrared pen when the infrared pen 120 is detected. An infrared pen through the infrared signal received directly from the 120 to the first infrared camera unit 140 and the infrared signal reflected through the first reflecting unit 160 and received by the first infrared camera unit 140. Camera control unit including a position calculation unit 182 for calculating the position of the position 120 to generate position information, and a signal conversion unit 183 for converting and outputting the generated position information to be processed by the image control unit 200. 180; And a control unit.

Description

Touch Recognition System using Reflector {SYSTEM FOR RECOGNIZING TOUCH-POINT USING MIRROR}

The present invention relates to a touch recognition system, and in detail, a touch using a reflector capable of precise multi-touch recognition by calculating a position by analyzing an infrared signal directly received and a reflected infrared signal reflected through a reflector during touch recognition using an infrared camera. It relates to a recognition system.

As presentations using computers increase in recent years, various user interface devices are required for more effective presentations.

A representative interface device that has been in the spotlight is a touch screen, which is a touch recognition system such as a touch screen installed in front of the image surface and touch point (touch) when the user touches a desired position. It allows you to recognize the coordinates of a point and implement a preprogrammed effect.

Such a touch recognition system can be implemented through various methods such as resistive film type, capacitive type, and infrared type. However, in the case of resistive film type and capacitive type, it is difficult to apply to a large image plane due to its structure, and due to its sophisticated configuration, Infrared systems are used because they are not applicable to lecture and presentation image planes where the touch points concentrated at a certain position must be recognized since there is a risk of damage.

However, the conventional infrared touch recognition system can not only recognize a single touch point, there is a problem that a plurality of infrared transceiver elements are required in order to recognize a plurality of touch points, the manufacturing cost is increased, a plurality of infrared Even with the transceiver, it was not possible to accurately recognize the touch point.

The present invention was created in order to solve the above problems, an object of the present invention is to receive the infrared light emitted from the infrared pen, but also to receive the infrared light reflected through the reflecting unit with the same effect as using two infrared cameras. The present invention provides a touch recognition system using a reflection unit that accurately recognizes a touch point.

According to a first aspect of the present invention, there is provided a touch recognition system for recognizing touch point coordinates of a screen through an infrared camera, comprising: an image control unit configured to output an image signal; An image output unit which processes an image signal output from the image control unit and outputs the image signal to a screen; An infrared pen having a light emitter to emit infrared light at one end; A first infrared camera unit installed to receive infrared light emitted from the infrared pen; A first reflector installed at one side of the first infrared camera unit to reflect the infrared rays emitted by the infrared pen and to receive the first infrared camera unit; A determination unit determining that the infrared pen is detected when the output signal level of the first infrared camera unit is higher than an upper reference signal level, and the infrared light directly received from the infrared pen to the first infrared camera unit when the infrared pen is detected; A position calculator for calculating position of the infrared pen and generating position information by analyzing an infrared signal reflected by the first reflector and received by the first infrared camera unit, and converting the generated position information to be processed by the image controller A camera control unit having a signal converting unit for outputting the unit; And a control unit.

At this time, the infrared radiation stage is provided on the edge of the screen and provided with a plurality of light emitting bodies for emitting infrared rays to the inside of the screen at predetermined intervals; The camera control unit may further include an auxiliary determining unit that determines that the non-transparent object is detected when the output signal level of the first infrared camera unit falls below a lower reference signal level, and the first infrared camera when the non-transparent object is detected. It may include an auxiliary position calculation unit for generating the position information by calculating the position of the non-transparent object through the analysis of the negative output signal.

Or a second infrared camera unit spaced apart from the first infrared camera unit to receive infrared light emitted from the infrared pen; The camera control unit may further include an infrared output signal directly received from the infrared pen to the first infrared camera unit and an infrared output signal reflected through the first reflecting unit and received by the first infrared camera unit, from the infrared pen. The apparatus may further include a multi-position calculation unit configured to generate position information by calculating an position of the infrared pen by analyzing the output signal of the infrared light received directly by the second infrared camera unit.

In addition, the first reflecting unit is installed outside the screen to reflect the infrared rays emitted by the infrared pen to receive the first infrared camera unit and the second infrared camera unit, the multi-position calculation unit is the first pen from the infrared pen Infrared light directly received by the infrared camera unit and infrared light reflected through the first reflecting unit and received by the first infrared camera unit, infrared light received directly from the infrared pen to the second infrared camera unit, and the first reflecting unit It may be configured to calculate the position of the infrared pen to generate position information by analyzing the output signal of the infrared light reflected by the second infrared camera unit received through.

Or a second reflecting unit installed on one side of the second infrared camera unit to reflect the infrared rays emitted by the infrared pen and to receive the light from the second infrared camera unit; The multi-position calculation unit further includes an infrared output signal directly received from the infrared pen to the first infrared camera unit and an infrared output signal reflected through the first reflector to the first infrared camera unit, and the infrared pen. The position of the infrared pen may be calculated by analyzing the output signal of the infrared light received directly from the second infrared camera unit and reflected from the second reflecting unit and received by the second infrared camera unit to generate position information. have.

At this time, the infrared radiation stage is provided on the edge of the screen and provided with a plurality of light emitting bodies for emitting infrared rays to the inside of the screen at predetermined intervals; The camera control unit further includes an auxiliary judging unit for determining that a non-transparent object is detected when the output signal levels of the first infrared camera unit and the second infrared camera unit fall below a lower reference signal level, and detecting the non-transparent object. The first infrared camera unit and the second infrared camera unit may include an auxiliary multi-position calculation unit for generating position information by calculating the position of the non-transparent object through the output signal analysis.

According to a second aspect of the present invention, there is provided a touch recognition system for recognizing touch point coordinates of a screen through an infrared camera, comprising: an image control unit configured to output an image signal; An image output unit which processes an image signal output from the image control unit and outputs the image signal to a screen; An infrared radiator mounted on an edge of the screen and provided with a plurality of light emitting bodies emitting infrared rays to the inside of the screen at predetermined intervals; A first infrared camera unit installed to receive infrared light emitted from the infrared radiation table; A first reflecting unit installed at one side of the first infrared camera unit to reflect the infrared rays emitted by the infrared radiation band and receive the light from the first infrared camera unit; When the output signal level of the first infrared camera unit 140 falls below the lower reference signal level, the auxiliary judging unit for determining that the non-transmissive object is detected, and the output signal analysis of the first infrared camera unit when the non-transmissive object is detected A camera controller 180 having an auxiliary position calculator for calculating the position of the non-transparent object and generating position information, and a signal converter for converting the generated position information to be processed by the image controller 200; And a control unit.

At this time, the second infrared camera unit spaced apart from the first infrared camera unit to receive the infrared radiation emitted from the infrared radiation zone; The apparatus may further include an auxiliary multi-position calculation unit configured to generate position information by calculating a position of the non-transmissive object by analyzing output signals of the first infrared camera unit and the second infrared camera unit.

In addition, the first reflecting unit may be installed on the outside of the screen to reflect the infrared radiation emitted from the infrared radiation band to receive from the first infrared camera unit and the second infrared camera unit.

Or a second reflector installed at one side of the second infrared camera unit to reflect the infrared rays emitted by the infrared radiation band and receive the light from the second infrared camera unit; As shown in FIG.

The first reflecting unit may be configured to have a curved convex mirror structure convex in the screen inner direction or a polygonal structure convex in the screen inner direction.

The second reflecting unit may be configured to have a curved convex mirror structure convex in the screen inner direction or a polygonal structure convex in the screen inner direction.

The present invention can achieve the same effect as using two infrared cameras by adding a reflecting unit to one infrared camera, thereby enabling accurate multi-touch recognition without errors.

In addition, the present invention can be applied irrespective of the type of the screen using a beam projector, LCD or LED, etc., and can reduce the number of installed infrared camera can achieve a cost reduction effect.

1 is a block diagram according to a first embodiment of the present invention;
2 is a block diagram illustrating a connection relationship between components according to the configuration of FIG. 1;
3 is a configuration diagram showing the installation of an infrared radiation band in the configuration of FIG.
4 is a configuration diagram of a state in which a second infrared camera unit is installed in the configuration of FIG. 1;
5 is a configuration diagram of a state in which the first reflector extended to the configuration of FIG. 4 is applied;
6 is a block diagram according to a second embodiment of the present invention;
7 is a block diagram illustrating a connection relationship between components according to the configuration of FIG. 6;
8 is a configuration diagram showing the installation of an infrared radiation band in the configuration of the second embodiment of the first invention
9 is a block diagram illustrating a connection relationship between components according to the configuration of FIG. 8;
10 is a configuration diagram according to a first embodiment of the second invention of the present invention;
11 is a block diagram showing a connection relationship between components according to the first embodiment of the second invention;
12 is a configuration diagram of a state in which a second infrared camera unit is installed in the configuration of FIG. 10;
FIG. 13 is a configuration diagram of a state in which an extended first reflector is applied to the configuration of FIG. 12; FIG.
14 is a block diagram according to a second embodiment of the present invention;
15 is a block diagram showing a connection relationship between components according to the configuration of beam 14;
16 is a perspective view showing a state of the first reflecting portion of the convex mirror shape;
17 is a perspective view showing a state of the first reflecting portion of the polygonal structure,
18 is a graph showing a concept of an upper reference signal level of an output signal of an infrared camera unit;
19 is a graph illustrating a change in an infrared camera output signal when an infrared pen or a non-transparent object is detected.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the touch recognition system using the reflector of the present invention.

1 is a block diagram showing a first embodiment of the present invention, Figure 2 is a block diagram showing the connection between the components according to the configuration of Figure 1, as shown in Figures 1 to 2 The first embodiment of the invention is the image control unit 200, the screen 100, the image output unit 110, the infrared pen 120, the first infrared camera unit 140, the first reflecting unit 160, the camera control unit It consists of 180.

The image control unit 200 is a device that performs a function similar to a computer, such as a desktop or laptop computer or a smart pad or a smartphone, which is generally used for a presentation, or a configuration embedded therein, and various images including an image for presentation. Output the signal.

The coordinate position of the touch point recognized through the present invention may be processed according to a pre-written program and output through the image control unit 200 in various forms. For this purpose, a computer which is commonly used for convenience in the present invention will be described. It is included, but not necessarily limited to.

The screen 100 is a screen of a standard for presenting a presentation while the presenter directly touches, and is installed in a conference room, seminar room, lecture room, etc., and an image is output on the screen 100 through the image output unit 110. do.

The image output unit 110 outputs an image to the screen 100 by processing an image signal output from the image control unit 200 or separately input, so as to output an image to the screen 100 or a beam projector having a structure separated from the screen 100. The image output means of various forms such as an LCD / LED monitor formed integrally with the screen 100, the position of the touch point recognized by the present invention is processed through a program set in the computer, the image control unit 200 Along with the image signal output from the is output to the screen 100 through the image output unit 110.

The infrared pen 120 is configured to present the presenter in his hand at the time of presentation, and to touch the screen 100. One end of the infrared pen 120 is provided with a light emitter to emit infrared light. To emit infrared light through the light emitter when contacting the screen 100.

At this time, the light emitter is preferably made of an infrared LED emitting strong infrared rays in the wavelength range of 850 to 940 nm, the circuit for operating the light emitter is a manual method or an infrared pen to supply power to the light emitter by pressing a switch ( A switch circuit (not shown) having an elastic body at one end of the 120 may be freely selected according to convenience in an automatic method such that the light emitter is operated by the pressure generated when the screen 100 is in contact with the screen 100.

The first infrared camera unit 140 is an infrared camera capable of sensing and photographing infrared rays. The infrared rays emitted from the infrared pen 120 are received through the first infrared camera unit 140 and recognized as camera pixel information. do.

The first reflector 160 is a kind of mirror capable of reflecting infrared rays emitted from the infrared pen 120, and reflects infrared rays emitted by the infrared pen 120 to allow the first infrared camera unit 140 to reflect the infrared rays emitted from the infrared pen 120. In order to receive from the screen 100 is installed at an appropriate position of the edge. In FIG. 1, a first infrared camera unit 140 is installed at an upper left corner of the screen 100, and the first reflecting unit 160 is installed above the first infrared camera unit 140. Although not shown in the figure, it is possible to install at any position capable of capturing infrared light emitted from the infrared pen 120.

In general, in order to photograph the infrared rays inside the large screen 100, the first infrared camera unit 140 and the first reflecting unit 160 should be spaced apart from the screen 100 by an appropriate distance, and the first infrared ray The camera unit 140 has a sufficiently large angle of view of 175 to 180 degrees.

This is a configuration to calculate the position of the touch point more precisely, in consideration of the fact that the more accurate position calculation can be achieved when using two infrared cameras than one infrared camera in general by adding a reflector to one infrared camera The same effect as installing a large infrared camera can be obtained.

The camera controller 180 includes a determination unit 181, a position calculation unit 182, and a signal conversion unit 183 in a configuration for controlling the first infrared camera unit 140.

The determination unit 181 detects and adds infrared rays generated from the infrared pen 120 to filter the influence of external infrared rays, and the output signal level of the first infrared camera unit 140 is equal to or higher than a higher reference signal level. In this case, the infrared pen 120 performs a function of determining that it is detected.

FIG. 18 is a graph illustrating a concept of an upper reference signal level of an output signal of the infrared camera unit, wherein the output signal of the first infrared camera unit 140 in the state where the light emitting unit I of the infrared pen 120 is not operated is shown in FIG. Indicates a level signal. If the light emitter I of the infrared pen 120 operates to emit infrared light, the infrared signal is detected by the first infrared camera unit 140, so that the output signal level is increased. At this time, when the output signal level is higher than the set upper reference signal level, the determination unit 181 determines that the touch of the infrared pen 120 is detected, and below the upper reference signal level, the touch of the infrared pen 120 is detected. It is determined that is not detected. As mentioned above, since the light emitter emits infrared light in a high wavelength range, the upper reference signal level is determined in consideration of this, and thus, only the infrared light emitted from the infrared pen 120 can be detected by removing the noise signal. .

The position calculator 182 determines the position of the infrared pen 120 by analyzing the output signal of the first infrared camera unit 140 when it is determined that the determination unit 181 detects the infrared pen 120. Calculate. In general, the time difference and the level difference between the infrared light received directly by the first infrared camera unit 140 and the infrared signal reflected by the first reflecting unit 160 and received by the first infrared camera unit 140 are compared. The location information is generated by performing coordinate calculation of the infrared light in the screen 100 through the observed infrared section (camera pixel section).

The signal converter 183 converts the position information generated by the position calculator 182 to be processed by the image controller 200, and transmits the position information to the image controller 200, and the image controller 200 does this. After processing by a program input in advance through a computer or the like, the image signal is transmitted to the image output unit 110 together with the image signal.

In this case, the camera controller 180 may be a separate controller or may be included in a computer together with the image controller 200. If it is configured as a separate controller is configured to deliver the converted position signal to the image control unit 200 or a computer including the same in a wired or RF wireless communication method.

The computer including the image control unit 200 received the position signal to recognize the position signal in the same way as the input means such as a mouse, on the image surface output to the screen 100 through the image output unit 110 Through the infrared pen 120 to implement the effect, such as writing or drawing. For example, if a user wants to highlight a specific color and thickness line on the image surface by using a touch point during the presentation, the specific color on the image surface of the corresponding position according to the position signal input through the signal converter 183. When the program is prepared in advance so that a line having a thickness and a thickness is drawn, the user moves the state of the light emitting body by touching the infrared pen 120 to the screen 100 so that the same trajectory has a specific color and thickness on the image surface. The line will be drawn.

FIG. 3 is a diagram illustrating a structure in which an infrared radiation emitter is installed in the configuration of FIG. 1. In the first embodiment of the present invention, the light emitter I emits infrared rays to the inside of the screen 100 at an edge of the screen 100. Infrared radiation stage 190 is provided with a plurality of at a predetermined interval is further included.

Such an infrared radiation emitter 190 is configured to detect not only the infrared pen 120 located inside the screen 100 but also the non-transparent object 130, and the non-transmissive object 130 transmits infrared rays. It can be any object that does not, but it can be a presenter's hand or a writing instrument having a predetermined area.

In this case, the infrared rays emitted from the light emitter I of the infrared radiation zone 190 are configured to emit infrared rays in a wavelength range relatively lower than the infrared rays emitted from the infrared pen 120 so that the first infrared camera unit 140 is The infrared radiation emitted from the infrared radiation station 190 to distinguish between the infrared radiation emitted from the infrared pen 120.

In addition, the camera controller 180 and the auxiliary determination unit 185 for determining that the non-transmissive object 130 is detected when the output signal level of the first infrared camera unit 140 falls below the lower reference signal level; When the non-transparent object 130 is detected, the auxiliary position calculation unit 186 calculates the position of the non-transmissive object 130 by analyzing the output signal of the first infrared camera unit 140 and generates position information. Done.

19 is a graph showing a change in the infrared camera output signal when detecting an infrared pen or a non-transparent object. When A detects the non-transparent object 130, B outputs the signal when the infrared pen 120 is detected. Each change is shown.

That is, the output signal of the first infrared camera unit 141, which receives only the infrared rays emitted from the infrared radiation station 190 in the absence of any touch, maintains a flat level. In this case, when the screen 100 is touched by a finger or the like, the infrared radiation emitted from the infrared radiation emitter 190 will be covered by the finger and the level of the output signal will be reduced. Infrared rays emitted from the infrared pen 120 are added to the infrared rays emitted from the radiation zone 190 to increase the level of the output signal.

By using the same principle, the auxiliary determining unit 185 determines that the non-transmissive object 130 is detected when the output signal level of the first infrared camera unit 141 falls below the lower reference signal level.

The lower reference signal level is set in consideration of the intensity of the infrared radiation emitted from the infrared radiation zone 190, and when the number of light emitters provided in the infrared radiation zone 190 is large, the lower reference signal than otherwise The level will be higher.

When the auxiliary position calculation unit 186 determines that the auxiliary determination unit 185 detects the non-transparent object 130, the infrared ray and the first reflection unit directly received by the first infrared camera unit 140 are included. Comparing the time difference and the level difference of the infrared signal reflected through the 160 and received by the first infrared camera unit 140, but the shaded interval (infrared rays) masked by the infrared rays due to the observed infrared and non-transmissive objects 130 Section to generate position information by performing coordinate calculation of the non-transparent object 130 in the screen 100.

Coordinates of the infrared pen 120 and the non-transmissive object 130 are calculated through the position calculating unit 182 and the auxiliary position calculating unit 186, and respective position information is generated.

Position information generated from the position calculation unit 182 and the auxiliary position calculation unit 186 is transmitted to the computer through the signal conversion unit 183 in a separated state, writing or general mouse when the infrared pen 120 is touched To perform a function such as the click of, to implement a variety of functions, such as erasing the written content using the infrared pen 120 using a wide touch area when the hand touch.

FIG. 4 is a diagram illustrating a configuration of a second infrared camera unit in the configuration of FIG. 1, in which a second infrared camera unit 150 is added to the first embodiment.

The second infrared camera unit 150 is configured to be substantially the same as the first infrared camera unit 140 to detect and photograph infrared rays emitted from the infrared pen 120, and the first infrared camera unit 140. And through the two infrared cameras of the second infrared camera unit 150 can be more accurate calculation of the touch point position.

In this case, in order to effectively recognize the touch point, the second infrared camera unit 150 may be installed at a sufficient distance from the first infrared camera unit 140. In FIG. 3, the first infrared camera unit 140 is installed at the upper left corner of the screen 100, and the second infrared camera unit 150 is installed at the upper right corner, respectively. It is not limited.

At this time, the camera controller 180 further includes a multi-position calculation unit 184. The multi-position calculation unit 184 is configured to calculate the position of the infrared pen 120 by analyzing the output signals of the two infrared cameras, from the infrared pen 120 to the first infrared camera unit 140. The infrared signal directly received through the first reflection unit 160 and the infrared signal received by the first infrared camera unit 140 and the second infrared camera unit 150 from the infrared pen 120 The location information is generated by analyzing the output signal of the infrared light received directly. That is, the position information generated by the position calculator 182 may be added to the position information of the infrared pen 120 analyzing the output signal of the second infrared camera unit 150 in addition to the accuracy of the plurality of touch points. When generated, a plurality of position information is generated without error through the second infrared camera unit 150.

Specifically, the multi-position calculation unit 184 compares the time difference and level difference between the output signal of the first infrared camera unit 140 and the output signal of the second infrared camera unit 150, and compares the observed infrared section (camera). Coordinate calculation of the infrared light in the screen 100 is performed through the pixel section.

FIG. 5 is a diagram illustrating a configuration in which the first reflecting unit extended to the configuration of FIG. 4 is applied, and the infrared rays reflecting the infrared rays reflected by extending the length of the first reflecting unit 160 sufficiently in the configuration as shown in FIG. In addition to the camera unit 140, the second infrared camera unit 150 is shown to be configured to receive light together.

That is, as shown in the upper portion of the screen 100 of FIG. 5, the length of the first reflecting unit 160 is sufficiently long, and the first infrared camera unit 140 and the second infrared camera unit 150 are respectively formed in the first reflecting unit 160. It is installed at both ends of the first reflecting unit 160.

Through this, even though two infrared cameras are actually installed, a total of four infrared cameras can be obtained. The multi-position calculation unit 184 has two infrared camera units 140 and 150 as shown in FIG. ) Signal.

That is, the multi-position calculation unit 184 is reflected by the infrared ray received directly from the infrared pen 120 to the first infrared camera unit 140 and the first reflecting unit 160 and the first infrared camera unit The output signal of the infrared light received by the 140 and the infrared light received directly from the infrared pen 120 to the second infrared camera unit 150 and reflected through the first reflecting unit 160 and the second infrared camera The output signal of the infrared light received by the unit 150 is analyzed to generate position information.

Specifically, the multi-position calculation unit 184 compares the time difference and level difference between the output signal of the first infrared camera unit 140 and the output signal of the second infrared camera unit 150, and compares the observed infrared section (camera). Coordinate calculation of the infrared light in the screen 100 is performed through the pixel section.

6 is a block diagram illustrating a connection relationship between components according to the second embodiment of the present invention, and FIG. 7 is a second infrared camera unit according to the first embodiment. 150 and a second reflecting unit 170 are shown. In the configuration of FIG. 5, the first reflecting unit 160 is divided into two parts, respectively, the first infrared camera unit 140 and the second infrared camera. The unit 150 is configured to reflect infrared rays.

Alternatively, in the above-described configuration of FIG. 4, the second reflection is installed at one side of the second infrared camera unit 150 to reflect the infrared rays emitted by the infrared pen 120 and to receive the light from the second infrared camera unit 150. In the configuration of FIG. 5 described above, the first infrared camera unit 140 and the second infrared ray camera unit 140 are disposed at both ends of one side of the screen 100 on which the first reflecting unit 160 is installed. When the infrared camera unit 150 is to be installed or the area of the screen 100 is increased, the first reflecting unit 160 may be formed to be long.

That is, in the second embodiment of the first invention of the present invention, the first infrared camera unit 140 and the second infrared camera unit 150 may be installed at corners facing diagonally instead of one side of the screen 100.

Through this, two infrared cameras can achieve the same effect as four infrared cameras are installed, and the multi-position calculation unit 184 is the same as in the configuration of FIG. 5 and the camera controller 180 has two infrared cameras. The signals of the units 140 and 150 are processed.

That is, the multi-position calculation unit 184 is reflected by the infrared ray received directly from the infrared pen 120 to the first infrared camera unit 140 and the first reflecting unit 160 and the first infrared camera unit The output signal of the infrared light received by the 140, the infrared light received directly from the infrared pen 120 to the second infrared camera unit 150, and reflected by the second reflector 170 are reflected by the second infrared ray. The location information is generated by analyzing the output signal of the infrared light received by the camera unit 150.

Specifically, the multi-position calculation unit 184 compares the time difference and level difference between the output signal of the first infrared camera unit 140 and the output signal of the second infrared camera unit 150, and compares the observed infrared section (camera). Coordinate calculation of the infrared light in the screen 100 is performed through the pixel section.

In addition to the first infrared camera unit 140, by providing a second infrared camera unit 150, more accurate multi-touch point recognition is achieved, in particular by adding a configuration of the reflector has the same effect as the additional infrared camera is installed. This effectively eliminates the ghost points that commonly occur during multi-touch.

Ghost point refers to a virtual point generated by the intersection of points when two touch points (P) occur in a structure equipped with only two infrared cameras without a reflector as (G) marks shown in FIG. 6. do. In order to remove such ghost points (G), the number of infrared cameras should be increased. In general, as the number of infrared cameras increases, accurate multi-coordinate recognition is possible.

However, without adding a separate infrared camera as in the present invention, the first infrared camera unit 140 and the second infrared camera unit 150 has a sufficiently large angle of view of 175 to 180 degrees, the first By adding the configuration of the reflecting unit 160 and the second reflecting unit 170, both the infrared rays transmitted directly from the infrared pen 120 and the infrared rays reflected through the reflecting unit are observed, so that an additional virtual infrared camera is installed. You can see the same effect. That is, the same effect as installing a total of four cameras through the two reflectors and two cameras can be seen, it is possible to fully recognize the multi-touch of 2-3 points. In FIG. 5, the ghost point G is removed through the above-described configuration.

FIG. 8 is a block diagram showing the installation of an infrared radiation band in the configuration of the second embodiment of the first invention, and FIG. 9 is a block diagram showing the connection relationship between the components according to the configuration of FIG. A stand 190 is added.

Hereinafter, the installation of the infrared radiation zone 190 in the configuration of FIG. 6 will be described as a second embodiment, but it will be apparent that the infrared radiation zone 190 may be installed in the configuration of FIGS. 4 and 5 described above. . In addition, the same structure which performs the same function as the 1st Embodiment of 1st invention is abbreviate | omitted description.

In the second embodiment of the first invention, in addition to the configuration in FIG. 7 described above, a plurality of light emitting units I are installed at the edges of the screen 100 and emit infrared rays to the inside of the screen 100 at predetermined intervals. Infrared radiation station 190 is installed, and the camera control unit 180 is non-provided when the output signal levels of the first infrared camera unit 140 and the second infrared camera unit 150 fall below the lower reference signal level. Analyzing the output signal of the auxiliary determination unit 185 and the first infrared camera unit 140 and the second infrared camera unit 150 when the non-transparent object 130 is detected. It includes the auxiliary multiple position calculation unit 187 for calculating the position of the non-transparent object 130 to generate position information.

A detailed description of the auxiliary determining unit 185 has been described in detail with reference to FIG. 19 through the configuration of FIG. 3, and the infrared pen 120 or the determining unit 181 and the auxiliary determining unit 185. Both detection of the non-transparent object 130 may be determined.

The auxiliary multi-position calculating unit 187 is reflected by the infrared ray directly received from the infrared radiation zone 190 to the first infrared camera unit 140 and the first reflecting unit 160 and the first infrared camera The output signal of the infrared light received by the unit 140 and the infrared light directly received by the second infrared camera unit 150 and the second reflector 170 are reflected to the second infrared camera unit 150. Analyze the output signal of the received infrared light, but analyzes the shaded portion obscured by the non-transparent object 130 to generate position information.

Specifically, the auxiliary multi-position calculation unit 187 compares the time difference and level difference between the output signal of the first infrared camera unit 140 and the output signal of the second infrared camera unit 150, and observes the shaded interval of the observed infrared rays. Coordinate calculation of the non-transparent object 130 in the screen 100 is performed through the camera pixel section.

FIG. 10 is a block diagram illustrating a connection relationship between components according to the first embodiment of the second invention of the present invention, and FIG. 11 is a non-light emitting device, not an infrared pen 120. The configuration for implementing the touch effect using the object 130 is shown.

A first embodiment of the second invention of the present invention is the image control unit 200, the screen 100, the image output unit 110, the first infrared camera unit 140, the first reflecting unit 160, the camera control unit 180 )

The image control unit 200 is a device that performs a function similar to a computer, such as a desktop or laptop computer or a smart pad or a smartphone, which is generally used for a presentation, or a configuration embedded therein, and various images including an image for presentation. Output the signal.

The coordinate position of the touch point recognized through the present invention may be processed according to a pre-written program and output through the image control unit 200 in various forms. For this purpose, a computer which is commonly used for convenience in the present invention will be described. It is included, but not necessarily limited to.

The screen 100 is a screen of a standard for presenting a presentation while the presenter directly touches, and is installed in a conference room, seminar room, lecture room, etc., and an image is output on the screen 100 through the image output unit 110. do.

The image output unit 110 outputs an image to the screen 100 by processing an image signal output from the image control unit 200 or separately input, so as to output an image to the screen 100 or a beam projector having a structure separated from the screen 100. The image output means of various forms such as an LCD / LED monitor formed integrally with the screen 100, the position of the touch point recognized by the present invention is processed through a program set in the computer, the image control unit 200 Along with the image signal output from the is output to the screen 100 through the image output unit 110.

The infrared radiation zone 190 is installed at the edge of the screen 100 and is provided with a plurality of light emitting units I emitting infrared rays inside the screen 100 at predetermined intervals. In the present invention, the infrared radiation zone 190 is installed on the left, right, and bottom edges of the screen 100, but the infrared radiation emitted from the infrared radiation zone 190 is the first infrared camera unit (second infrared ray). It is possible to change the location in a range that can be received through the camera unit).

The infrared radiation stand 190 is configured to detect the non-transparent object 130 located inside the screen 100, the non-transmissive object 130 may be any object that does not transmit infrared rays. However, it may be a writing instrument having a predetermined area or a presenter's hand.

The first infrared camera unit 140 is an infrared camera capable of sensing and photographing infrared rays, and the infrared rays emitted from the infrared radiation zone 190 are received through the first infrared camera unit 140.

The first reflector 160 is a kind of mirror capable of reflecting the infrared rays emitted from the infrared radiation zone 190. The first reflection unit 160 reflects the infrared rays emitted from the infrared radiation zone 190 and the first infrared camera unit ( 140 is installed at an appropriate position of the edge of the screen 100 to receive light. In FIG. 10, a first infrared camera unit 140 is installed at an upper left corner of the screen 100, and the first reflecting unit 160 is installed above the first infrared camera unit 140. Although not shown in the figure, it can be installed at any position capable of photographing infrared light emitted from the infrared radiation station 190.

In general, in order to photograph the infrared rays inside the large screen 100, the first infrared camera unit 140 and the first reflecting unit 160 should be spaced apart from the screen 100 by an appropriate distance, and the first infrared ray The camera unit 140 has a sufficiently large angle of view of 175 to 180 degrees.

This is a configuration to calculate the position of the touch point more precisely, in consideration of the fact that the more accurate position calculation can be achieved when using two infrared cameras than one infrared camera in general by adding a reflector to one infrared camera The effect is the same as installing a large infrared camera.

The camera controller 180 determines that the non-transmissive object 130 is detected when the output signal level of the first infrared camera unit 140 falls below a lower reference signal level, and Auxiliary position calculation unit 186 generating position information by calculating the position of the non-transmissive object 130 through analyzing the output signal of the first infrared camera unit 140 when detecting the light-transmitting object 130, and the generated position And a signal converter 183 converting and outputting the information to be processed by the image controller 200.

Since the auxiliary determination unit 185 has the same configuration as in the first invention, a detailed operation description is omitted.

When the auxiliary position calculation unit 186 determines that the non-transparent object 130 is detected by the auxiliary determination unit 185, the non-transparent object 130 is analyzed through an output signal analysis of the first infrared camera unit 140. ) Is calculated. In general, the time difference and the level difference between the infrared light received directly by the first infrared camera unit 140 and the infrared signal reflected by the first reflecting unit 160 and received by the first infrared camera unit 140 are compared. In addition, the position information is generated by performing coordinate calculation of the non-transmissive object 130 in the screen 100 through the observed infrared shadow section (camera pixel section).

The signal converter 183 converts the position information generated by the auxiliary position calculator 186 to be processed by the image controller 200, and transmits the position information to the image controller 200, and in the image controller 200. This is processed by a program previously input through a computer or the like and then transmitted to the image output unit 110 together with the image signal.

FIG. 12 is a diagram illustrating a configuration of a second infrared camera unit in the configuration of FIG. 10, in which the second infrared camera unit 150 is added in the first embodiment of the second invention.

The second infrared camera unit 150 is configured substantially the same as the first infrared camera unit 140 to detect and photograph the infrared radiation emitted from the infrared radiation stage 130, the first infrared camera unit 140 ) And the two infrared cameras of the second infrared camera unit 150 can be more accurate calculation of the touch point position.

In this case, in order to effectively recognize the touch point, the second infrared camera unit 150 may be installed at a sufficient distance from the first infrared camera unit 140. In FIG. 12, the first infrared camera unit 140 is installed at the upper left corner of the screen 100 and the second infrared camera unit 150 is installed at the upper right corner, respectively. Make sure it doesn't work.

In this case, the camera controller 180 further includes an auxiliary multiple position calculation unit 187. The auxiliary multi-position calculation unit 187 is configured to calculate the position of the non-transmissive object 130 by analyzing the output signals of the two infrared cameras, from the infrared radiation table 190 to the first infrared camera unit ( Infrared light directly received by the light 140 and reflected through the first reflecting unit 160, the output signal of the infrared light received by the first infrared camera unit 140 and the second infrared camera from the infrared radiation zone 190 The location information is generated by analyzing the output signal of the infrared light received directly by the unit 150.

Specifically, the auxiliary multi-position calculating unit 187 compares the time difference and level difference between the output signal of the first infrared camera unit 140 and the output signal of the second infrared camera unit 150, and observes the observed interval ( Coordinate calculation of the non-transparent object 130 in the screen 100 through the camera pixel section. That is, the position information generated by the auxiliary position calculation unit 186 may be added to the position information of the non-transmissive object 130 analyzing the output signal of the second infrared camera unit 150 to improve the precision, or When a touch point is generated, a plurality of location information is generated without error through the second infrared camera unit 150.

FIG. 13 is a diagram illustrating a configuration in which an extended first reflector is applied to the configuration of FIG. 12. In the above-described configuration of FIG. 12, a first infrared camera unit reflects infrared rays reflected by extending the length of the first reflector 160 sufficiently. In addition to 140, the second infrared camera unit 150 also shows a state configured to receive light together.

That is, as shown in FIG. 13, the length of the first reflecting unit 160 is sufficiently long on the screen 100, and the first infrared camera unit 140 and the second infrared camera unit 150 are respectively formed in the first reflecting unit 160. It is installed at both ends of the first reflecting unit 160.

Through this, even though two infrared cameras are actually installed, a total of four infrared cameras can be obtained. The multi-position calculation unit 184 has two infrared camera units 140 and 150 as shown in FIG. ) Signal.

That is, the multi-position calculation unit 184 is reflected by the infrared ray directly received from the infrared radiation unit 130 to the first infrared camera unit 140 and the first reflecting unit 160 and the first infrared camera The output signal of the infrared light received by the unit 140, the infrared light directly received from the infrared radiation zone 130 to the second infrared camera unit 150 and the first reflecting unit 160 are reflected by the first The infrared signal received by the infrared camera unit 150 is analyzed to generate position information.

In detail, the multi-position calculation unit 184 compares the time difference and level difference between the output signal of the first infrared camera unit 140 and the output signal of the second infrared camera unit 150, and observes the observed shadow period of infrared rays ( Coordinate calculation of the non-transparent object 130 in the screen 100 through the camera pixel section.

FIG. 14 is a block diagram showing a connection relationship between components according to the configuration of beam 14 according to a second embodiment of the second invention of the present invention. FIG. FIG. 13 shows a configuration in which the infrared camera unit 150 and the second reflecting unit 170 are added. In the configuration of FIG. 13, the first reflecting unit 160 is divided into two parts, respectively, the first infrared camera unit 140 and It is configured to reflect infrared rays to the second infrared camera unit 150.

Alternatively, in the configuration of FIG. 12 described above, the second infrared camera unit 150 is installed at one side of the second infrared camera unit 150 to reflect the infrared rays emitted from the infrared radiation zone 130 to receive the light from the second infrared camera unit 150. 13, the first infrared camera unit 140 and the first infrared camera unit 140 are formed at both ends of one side of the screen 100 in which the first reflecting unit 160 is installed. When the infrared camera unit 150 is to be installed or the area of the screen 100 is increased, the first reflecting unit 160 may also be formed to have a long length.

That is, in the second embodiment of the second invention, the first infrared camera unit 140 and the second infrared camera unit 150 may be installed at corners facing diagonally instead of one side of the screen 100.

Similarly, through this, a total of four infrared cameras can be obtained, and the same effect can be obtained. The multi-position calculation unit 184 has the same configuration as in FIG. 5, and the camera controller 180 has two infrared camera units 140, The signal of 150).

That is, the multi-position calculation unit 184 is reflected by the infrared ray directly received from the infrared radiation unit 130 to the first infrared camera unit 140 and the first reflecting unit 160 and the first infrared camera The output signal of the infrared light received by the unit 140, the infrared light directly received from the infrared radiation unit 130 to the second infrared camera unit 150 and the second reflecting unit 170 is reflected by the second The infrared signal received by the infrared camera unit 150 is analyzed to generate position information.

In detail, the multi-position calculation unit 184 compares the time difference and level difference between the output signal of the first infrared camera unit 140 and the output signal of the second infrared camera unit 150, and observes the observed shadow period of infrared rays ( Coordinate calculation of the non-transparent object 130 in the screen 100 through the camera pixel section.

In addition to the first infrared camera unit 140, by providing a second infrared camera unit 150, more accurate multi-touch point recognition is achieved, in particular by adding a configuration of the reflector has the same effect as the additional infrared camera is installed. This effectively eliminates the ghost points that commonly occur during multi-touch.

FIG. 16 is a perspective view illustrating a first reflective portion having a convex mirror shape, and FIG. 17 is a perspective view illustrating a first reflective portion having a polygonal structure.

If the area of the screen 100 is enlarged, the first infrared camera unit 140 and the first infrared camera unit 140 may be photographed from the screen 100 in order to photograph the infrared pen 120 that emits infrared rays at all positions inside the entire screen 100. The distance of the first reflecting unit 160 should be farther away. For example, when the first infrared camera unit 140 and the first reflecting unit 160 are installed in close proximity to the screen 100, the first reflection is performed at the boundary of the screen 100 where the first reflecting unit 160 is located. A blind spot may occur in a part far from the part 100.

It is preferable to configure the first reflecting portion 160 in the form of a convex mirror such that the distance of the first reflecting portion 160 is not spaced more than necessary from the screen 100 while effectively preventing the blind spots. Specifically, as shown in FIG. 16, the screen 100 is formed in a convex mirror structure that is convex in the inward direction, and by adjusting the angle, even if the size of the first reflective part 160 is relatively small, Infrared rays emitted from the infrared pen 120 or the infrared radiation zone 130 positioned inside may be reflected to the first infrared camera unit 140.

Alternatively, the first reflecting unit 160 may be formed to have a polygonal structure having a convex shape toward the inside of the screen 100 as shown in FIG. 17, and the effect is the same as that of the convex mirror in FIG. 16.

As in the second embodiment of the first invention or the second embodiment of the second invention, when the first reflecting unit 160 and the second reflecting unit 170 are formed separately, the second reflecting unit 170 is likewise. ) May be configured to have a curved convex mirror structure convex in the inner direction of the screen 100 or a polygonal structure convex in the inner direction of the screen 100.

It is to be understood that the invention is not limited to the disclosed embodiment, but is capable of many modifications and variations within the scope of the appended claims. It is self-evident.

100: screen 110: image output unit
120: infrared pen 130: non-transparent object
140: first infrared camera unit 150: second infrared camera unit
160: first reflecting unit 170: second reflecting unit
180: camera control unit 181: determination unit
182: position calculation unit 183: signal conversion unit
184: multi-position calculation unit 185: auxiliary determination unit
186: auxiliary position calculation unit 187: auxiliary multiple position calculation unit
190: infrared radiation station 200: image control unit
I: illuminant

Claims (12)

In the touch recognition system that recognizes the touch point coordinates of the screen through the infrared camera,
An image control unit 200 for outputting an image signal;
An image output unit 110 for processing the image signal output from the image control unit 200 and outputting the image signal to the screen 100;
An infrared pen 120 having a light emitter to emit infrared light at one end thereof;
A first infrared camera unit 140 installed to receive infrared light emitted from the infrared pen 120;
A first reflecting unit (160) installed at one side of the first infrared camera unit (140) to reflect the infrared rays emitted by the infrared pen (120) and to receive the light from the first infrared camera unit (140);
The determination unit 181 determines that the infrared pen 120 is detected when the output signal level of the first infrared camera unit 140 is higher than the upper reference signal level, and the infrared pen when the infrared pen 120 is detected. An infrared pen through the infrared signal received directly from the 120 to the first infrared camera unit 140 and the infrared signal reflected through the first reflecting unit 160 and received by the first infrared camera unit 140. Camera control unit including a position calculation unit 182 for calculating the position of the position 120 to generate position information, and a signal conversion unit 183 for converting and outputting the generated position information to be processed by the image control unit 200. 180; Touch recognition system using a reflector, characterized in that comprises a.
The method of claim 1,
An infrared radiator 190 installed at an edge of the screen 100 and provided with a plurality of light emitters emitting infrared rays to the inside of the screen 100 at predetermined intervals; Further comprising:
The camera controller 180 determines that the non-transmissive object 130 is detected when the output signal level of the first infrared camera unit 140 falls below a lower reference signal level, and And an auxiliary position calculating unit 186 for generating position information by calculating a position of the non-transmissive object 130 by analyzing the output signal of the first infrared camera unit 140 when detecting the transparent object 130. Touch recognition system using a reflection unit.
The method of claim 1,
A second infrared camera unit 150 spaced apart from the first infrared camera unit 140 to receive infrared light emitted from the infrared pen 120; Further comprising:
The camera controller 180 reflects the infrared light directly received from the infrared pen 120 to the first infrared camera unit 140 and the first reflecting unit 160 to reflect the first infrared camera unit 140. The position information is generated by calculating the position of the infrared pen 120 by analyzing the output signal of the infrared light received by the infrared ray and the output signal of the infrared light received directly from the infrared pen 120 to the second infrared camera unit 150. Touch recognition system using a reflector, characterized in that it further comprises a multi-position calculation unit 184.
The method of claim 3,
The first reflector 160 is installed outside the screen 100 to reflect the infrared rays emitted from the infrared pen 120 to receive the light from the first infrared camera unit 140 and the second infrared camera unit 150. ,
The multi-position calculation unit 184 is reflected through the first infrared reflecting unit 160 and the infrared light received directly from the infrared pen 120 to the first infrared camera unit 140 and the first infrared camera unit ( The output signal of the infrared light received by the 140, the infrared light received directly from the infrared pen 120 to the second infrared camera unit 150, and reflected by the first reflecting unit 160 are reflected to the second infrared camera. Touch recognition system using a reflector, characterized in that for generating position information by calculating the position of the infrared pen 120 by analyzing the output signal of the infrared light received by the unit 150.
The method of claim 3,
A second reflection unit 170 installed at one side of the second infrared camera unit 150 to reflect the infrared rays emitted by the infrared pen 120 and to receive the light from the second infrared camera unit 150; Further comprising:
The multi-position calculation unit 184 is reflected through the first infrared reflecting unit 160 and the infrared light received directly from the infrared pen 120 to the first infrared camera unit 140 and the first infrared camera unit ( The output signal of the infrared light received by the 140, the infrared light directly received from the infrared pen 120 to the second infrared camera unit 150 and the second reflecting unit 170 are reflected by the second infrared camera Touch recognition system using a reflector, characterized in that for generating position information by calculating the position of the infrared pen 120 by analyzing the output signal of the infrared light received by the unit 150.
6. The method according to any one of claims 3 to 5,
An infrared radiator 190 installed at an edge of the screen 100 and provided with a plurality of light emitters emitting infrared rays to the inside of the screen 100 at predetermined intervals; Further comprising:
The camera controller 180 determines that the non-transmissive object 130 is detected when the output signal levels of the first infrared camera unit 140 and the second infrared camera unit 150 fall below a lower reference signal level. When the auxiliary determining unit 185 and the non-transparent object 130 are detected, the position of the non-transparent object 130 is calculated by analyzing output signals of the first infrared camera unit 140 and the second infrared camera unit 150. Touch recognition system using a reflector, characterized in that it comprises an auxiliary multiple position calculation unit 187 for generating position information.
In the touch recognition system that recognizes the touch point coordinates of the screen through the infrared camera,
An image control unit 200 for outputting an image signal;
An image output unit 110 for processing the image signal output from the image control unit 200 and outputting the image signal to the screen 100;
An infrared radiator 190 installed at an edge of the screen 100 and provided with a plurality of light emitters emitting infrared rays to the inside of the screen 100 at predetermined intervals;
A first infrared camera unit 140 installed to receive infrared light emitted from the infrared radiation station 190;
A first reflecting unit (160) installed at one side of the first infrared camera unit (140) to reflect the infrared rays emitted by the infrared radiation station (190) and to receive the light from the first infrared camera unit (140);
When the output signal level of the first infrared camera unit 140 falls below the lower reference signal level, the auxiliary determining unit 185 which determines that the non-transparent object 130 is detected, and when the non-transparent object 130 is detected The auxiliary position calculator 186 calculates the position of the non-transparent object 130 and generates position information by analyzing the output signal of the first infrared camera unit 140, and generates the position information into the image control unit 200. A camera control unit (180) having a signal conversion unit (183) for converting and outputting the data to be processed by the control unit; Touch recognition system using a reflector, characterized in that comprises a.
The method of claim 7, wherein
A second infrared camera unit 150 spaced apart from the first infrared camera unit 140 to receive infrared light emitted from the infrared radiation station 190; Further comprising:
The camera controller 180 calculates the position of the non-transmissive object 130 by analyzing output signals of the first infrared camera unit 140 and the second infrared camera unit 150 to generate position information. Touch recognition system using a reflector, characterized in that it further comprises a calculator (187).
9. The method of claim 8,
The first reflecting unit 160 reflects the infrared rays emitted by the infrared radiation table 190 to receive the light from the first infrared camera unit 140 and the second infrared camera unit 150 to the outside of the screen 100. Touch recognition system using a reflection unit, characterized in that installed in.
9. The method of claim 8,
A second reflector 170 installed at one side of the second infrared camera unit 150 to reflect the infrared rays emitted by the infrared radiation station 190 and to receive the light from the second infrared camera unit 150; Touch recognition system using a reflection unit further comprises.
8. The method of claim 1 or 7,
The first reflection unit 160 is a touch recognition system using a reflector, characterized in that it has a convex mirror structure convex in the inner direction of the screen 100 or a polygonal structure convex in the inner direction of the screen 100. .
11. The method according to claim 5 or 10,
The second reflector 170 has a curved convex mirror structure that is convex toward the inside of the screen 100 or a polygonal structure that has a convex shape toward the inside of the screen 100 to the touch recognition system. .

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