KR101207877B1 - Apparatus of coordinates cognition and method of cognizing coordinates - Google Patents

Abstract

The present invention relates to a coordinate recognition device and a coordinate recognition method capable of simply and accurately recognizing coordinates of an object. The coordinate recognizing apparatus includes a screen, at least one laser film generating unit for generating a laser film in a plane spaced apart from the screen, and at least one light receiving unit for recognizing reflected light of the laser film reflected by an object passing through the laser film.
According to the coordinate recognizing apparatus and the coordinate recognizing method according to the present invention, a device capable of accurately recognizing an object with a simple structure can be configured, and a very simple structure on a large-area screen that is not easy to manufacture with a touch panel. And a highly reliable multi-touch screen can be formed. In particular, it is possible to manufacture a multi-screen that can be used by a large number of people.

Description

Apparatus of coordinates cognition and method of cognizing coordinates}

The present invention relates to a coordinate recognition device and a coordinate recognition method, and more particularly, to a coordinate recognition device and a coordinate recognition method that can recognize the coordinates of the object simply and accurately.

Recently, with the development of augmented reality technology, technologies that fuse the real world and the virtual world with each other are being developed. For example, techniques for creating an environment such as an indoor golf course or an indoor baseball field to create a feeling of exercising outdoors with a real ball are attracting attention.

In order for the real environment and the virtual environment to be naturally integrated, there is a need for a method that can accurately recognize the state of various elements operating in the real environment and properly reflect it in the virtual environment. For example, in an indoor golf course, the position and speed of the ball hit by the player must be accurately determined and reflected on the screen, so that the player is mistaken as if he is playing in a real environment. In realizing such augmented reality, the core technology is a technology that can accurately recognize objects in the real space.

In particular, technologies that can accurately recognize coordinates on a large screen are important, and various methods have been tried in the past. For example, the light emitting units are disposed in front of the screen in the X and Y axes, respectively, and the light receiving units are disposed on the X and Y axes facing each other. There is a way to recognize it. Such a method has a problem in that the cost of the sensor increases as the area of the screen increases, and a problem arises in that small objects cannot be recognized when the distance between the sensors is wide.

In particular, the maximum speed of the golf ball hit by the player reaches 260km / h, in which case the golf ball moves about 6.7cm for 1/1000 seconds. Considering that the diameter of the golf ball is about 40mm, it is necessary to scan about 2000 times per second to recognize the coordinates of the moving golf ball. Such a condition causes a lot of difficulties in system configuration from a technical and economical point of view.

In addition, one method of obtaining the trajectory of a golf ball used in screen golf is a method using a orthogonal light receiving sensor bar disclosed in the Korean patent application (application number 10-2006-0128583). Since the method using the orthogonal light receiving sensor bar is a method of predicting the coordinates of a moving object, there is a problem that the accuracy is lowered due to the error of resolution caused by the sensor interval.

Therefore, a coordinate system and a method of accurately recognizing the movement of a small object moving in a simple but fast moving structure can be calculated, and thus can be accurately mapped on the screen, there is a need for a coordinate recognition device and method.

An object of the present invention is to provide a coordinate recognition device that can recognize the coordinates of the object simply and accurately.

Another technical problem to be achieved by the present invention is to provide a coordinate recognition method that can recognize the coordinates of an object simply and accurately.

The technical objects of the present invention are not limited to the above-mentioned technical problems, and other technical subjects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a coordinate recognition apparatus, including a screen, at least one laser film generating unit generating a laser film on a plane spaced apart from the screen, and an object passing through the laser film. At least one light receiving unit for recognizing the reflected light of the laser film reflected by the.

According to another aspect of the present invention, there is provided a coordinate recognition method, which includes obtaining an image of an object passing through a laser film, and determining reflected light of the laser film reflected by the object in the image. And converting the position of the reflected light into coordinates.

According to the coordinate recognizing apparatus and the coordinate recognizing method according to the present invention, an apparatus capable of accurately recognizing an object with only a simple structure can be configured.

In addition, it is possible to form a multi-touch screen which is very accurate and has excellent fastness with a simple structure on a large-area screen which is not easy to manufacture with a touch panel.

In particular, it is possible to manufacture a multi-screen that can be used by a large number of people.

1 is a schematic block diagram of an apparatus for recognizing a coordinate according to a first embodiment of the present invention.
FIG. 2 is a schematic side view of the apparatus for recognizing coordinates of FIG. 1.
3A is a perspective view illustrating a laser film generating unit included in the coordinate recognition apparatus of FIG. 1.
3B is a perspective view for describing a modified embodiment of the laser film generating unit of FIG. 3A.
3C is a perspective view for describing another modified embodiment of the laser film generating unit of FIG. 3A.
4A to 4E are views illustrating a process of recognizing the reflected light of the laser film reflected by an object.
5 is a schematic cross-sectional view for explaining a size relationship between a screen, a laser film, and an object.
6 is a schematic view for explaining a light receiving principle of a coordinate recognition device using an infrared laser film.
7 is a diagram for describing a process of converting coordinates by converting a recognition image of a light receiver.
8 is a flowchart illustrating a coordinate recognition process according to an embodiment of the present invention.
9 is a schematic structural diagram of a coordinate recognition apparatus according to a second embodiment of the present invention.
10 is a flowchart illustrating a coordinate recognition process of the coordinate recognition apparatus of FIG. 9.
11 is a schematic structural diagram of a coordinate recognition apparatus according to a third embodiment of the present invention.
FIG. 12 is a schematic cross-sectional view for describing a coordinate recognition process of the coordinate recognition apparatus of FIG. 11.
FIG. 13 is a diagram for describing a coordinate conversion process of the coordinate recognition apparatus of FIG. 11.
14 is a schematic structural diagram of a coordinate recognition apparatus according to a fourth embodiment of the present invention.
FIG. 15 is a schematic side view for explaining a coordinate recognition process of the coordinate recognition apparatus of FIG. 14.
FIG. 16 is a schematic diagram of a device for explaining a coordinate recognition process according to a fifth embodiment of the present invention.
17 is a schematic structural diagram of a coordinate recognition apparatus according to a sixth embodiment of the present invention.

Advantages and features of the present invention, and methods of achieving the same will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

In the present invention, the coordinate recognition device refers to a device capable of converting the position of an object (for example, a golf ball, a baseball, a part of the human body, etc.) existing in the real space into coordinates in a plane or space. This refers to a device that can recognize the coordinates of an object passing through a specific area.

Hereinafter, a coordinate recognition apparatus and a coordinate recognition method according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 17.

<Coordinate recognition device I>

First, referring to FIGS. 1 and 2, FIG. 1 is a schematic structural diagram of a coordinate recognition apparatus according to a first embodiment of the present invention, and FIG. 2 is a schematic side view of the coordinate recognition apparatus of FIG. 1.

The coordinate recognition apparatus 1 according to the first embodiment of the present invention has the laser film 20 that is reflected on the object OJ at the moment when the object OJ moving toward the screen 10 passes through the laser film 20. ) Is a device that recognizes the position of the object OJ by measuring the reflected light.

Specifically, the coordinate recognition apparatus 1 includes the screen 10, at least one laser film generating unit 21a, 21b, 21c, 21d for generating the laser film 20, and the light receiving unit 30 capable of recognizing the laser. It includes. That is, the coordinate recognition apparatus 1 is a device capable of accurately recognizing the position of the object OJ by capturing an object OJ moving toward the screen 10 with a camera and analyzing the coordinates.

The screen 10 serves to display images of various virtual worlds. For example, an image projecting device such as a projector (see 40 of FIG. 9) may be used to project an image on the screen 10. Such a screen 10 may be used a variety of display devices that can display an image to enable augmented reality, but is not necessarily limited to the device for displaying an image, it may form a solid surface having a specific color. have.

The planar laser film 20 is formed on the front surface of the screen 10. The laser film 20 refers to the projection of the laser in the form of a thin film, and refers to the projection of the laser to form a plane parallel to the screen (10). The laser film 20 is reflected on the surface of the object OJ passing therethrough and is incident on the light receiving unit 30, and it is recognized that the object OJ passes through the laser film 20. The method of obtaining the coordinates of the object OJ passing through the laser film 20 will be described later in detail.

The laser film 20 may have a shape in which a laser is projected through a slit, or a linear laser may be closely arranged to form a planar shape. The laser film 20 should be formed at a density such that the object OJ passing through can at least touch the laser. That is, the laser beam must be projected closely enough so that the object OJ passing through the laser film 20 can touch the laser.

The laser film 20 may be spaced apart from the screen 10, and may be disposed to be parallel to the screen 10. However, the laser film 20 may not be disposed to form a horizontal plane with the screen 10 as necessary. For example, some of the laser film 20 may form a horizontal plane with the screen 10 and another laser film may form a predetermined sloped surface with the screen 10.

When the object OJ comes into contact with or passes through the laser film 20 disposed on the front surface of the screen 10, the laser constituting the laser film 20 is reflected by the object OJ. In this case, the light receiving unit 30 captures the reflected light of the laser film 20 reflected by the object OJ. The light receiving unit 30 is a kind of camera including an image sensor such as a complementary metal-oxide-semiconductor (CMOS), a charge-coupled device (CCD), etc., and can recognize the laser reflected light reflected by the object OJ. Refers to various devices. Such a light receiving portion 30 is usually disposed to face the screen 10 and the laser film 20, and is not necessarily located at the center of the screen 10 and the laser film 20. For example, when the light receiver 30 is disposed in a direction looking downward from the top of the screen 10 and the laser film 20, the image of the screen 10 and the laser film 20 may be distorted. The distorted image is converted again to determine the position of the object OJ on the screen 10. Therefore, if the position of the light receiving unit 30 is a position where the image of the screen 10 and the laser film 20 can be photographed, various places such as an upper portion, a lower portion, or a side portion of the screen 10 are possible.

The light receiver 30 is preferably arranged to photograph the screen 10 and the laser film 20 as a whole, but may also photograph only some surfaces of the screen 10 and the laser film 20 as necessary. That is, when the screen 10 and the laser film 20 form a large area, and the angle of view of the light receiver 30 cannot capture both the screen 10 and the laser film 20, the screen 10 and the laser film ( It is possible to recognize only the coordinates of a portion of 20), or to capture a large area by connecting the narrow light receiving areas using the plurality of light receiving units 30.

Hereinafter, the laser film generating unit will be described in detail with reference to FIGS. 3A to 3C. 3A is a perspective view illustrating a laser film generating unit included in the coordinate recognition apparatus of FIG. 1, FIG. 3B is a perspective view illustrating a modified embodiment of the laser film generating unit of FIG. 3A, and FIG. 3C is a laser film of FIG. 3A. It is a perspective view for demonstrating another modified example of the generation part.

First, referring to FIG. 3A, a coordinate recognition apparatus according to an exemplary embodiment uses the laser film 20 generated through the plurality of laser film generators 21a, 21b, 21c, and 21d.

The laser film generators 21a, 21b, 21c, and 21d include a linear laser generator, and the linear lasers 22 are spread out at minute intervals to form a flat laser film 20. The laser film generators 21a, 21b, 21c, and 21d may be provided near four corners of the screen 10 to increase the density of the laser film 20 and to obtain uniform directionality. That is, the laser film generators 21a, 21b, 21c, and 21d are disposed near the four corners of the screen 10, so that the laser can be irradiated to four sides of the object. Therefore, the laser reflected light reflected through the object OJ may represent the external shape of the object OJ.

The laser film 20 may not actually be rectangular as shown in FIG. 3A. That is, the rectangular laser film 20 shown in FIG. 3A corresponds to an exemplary effective area of the laser film 20 set in consideration of the screen 10 and the light receiving unit 30. Thus, as long as the area of the laser film 20 can be processed by the light receiving portion 30, there will be no limitation on the area.

On the other hand, the laser film 20 may be formed so that the linear laser 22 irradiated from each laser film generating portion (21a, 21b, 21c, 21d) to form a net shape, the interval of each laser is passed through the object (OJ) Can be adjusted according to the size of For example, when the size of the passing object OJ is large, the spacing of each laser may be large.

However, when the distance between the lasers increases, the reflected light reflected by the object OJ may be weakened, or the appearance of the object OJ may not be discriminated by the reflected light. The laser film generators 21a, 21b, 21c, and 21d do not necessarily need to irradiate the linear laser 22, but may irradiate a planar laser beam through the slit.

In addition, the positions of the laser film generators 21a, 21b, 21c, and 21d are not necessarily limited to those positioned at the corners of the screen 10, and the laser film generators 21a, 21b, 21c, and 21d may have various positions. It is not limited to what is arrange | positioned uniformly in a direction. That is, it is preferable to arrange at an appropriate position in consideration of the position of the screen 10 and the light receiving portion 30 and the like.

Next, referring to FIG. 3B, the coordinate recognizing apparatus according to the exemplary embodiment of the present invention may use the laser film 20 generated through the single laser film generator 21a.

Even in the case of using the single laser film generator 21a, as described above, a linear laser generator or a slit laser generator can be used. That is, if it is determined that the reflected light can be sufficiently measured even using one laser film generator 21a, one laser film generator 21a can be disposed at an appropriate position.

However, when one laser film generator 21a is used, since the laser does not reach the opposite surface of the object OJ, the area that can be measured by the light receiver 30 is half of the object OJ. It is about.

Even though only half of the object OJ can be recognized, the coordinates of the object OJ can be sufficiently recognized, and thus the number and positions of the laser film generating units 21a may be selectively applied.

Next, referring to FIG. 3C, the coordinate recognizing apparatus according to the exemplary embodiment of the present invention may include a laser film generator 21 ′ using a polygon mirror. A polygon mirror is a mirror capable of reflecting a laser in various directions, including a polygonal mirror surface. That is, when a linear laser is irradiated to the rotating polygon mirror, the laser is irradiated in various directions on the same plane. The laser film generating unit 21 ′ using the polygon mirror has an advantage that the irradiation angle of the laser is very wide so that a large area can be irradiated with one laser film generating unit.

As shown in FIG. 3C, the laser film generator 21 ′ including the polygon mirror may irradiate a laser to a large area even if only one is disposed below the screen 10.

Hereinafter, referring to FIGS. 4A to 4E, a coordinate transplantation process of the coordinate recognition apparatus according to the first embodiment of the present invention will be described in detail. 4A to 4E are views illustrating a process of recognizing the reflected light of the laser film reflected by an object.

4A to 4D show still images of a process in which the object OJ passes through the laser film 20, and FIG. 4E shows each image during FIGS. 4A to 4D.

First, FIG. 4A shows an image when the laser light of the laser film 20 is reflected by the object OJ and started to be recognized by the light receiving unit 30. Specifically, assuming that the laser film 20 is a coordinate recognition device having a structure positioned between the screen 10 and the light receiving portion 30, a spherical object OJ may be used to cover the laser film 20. Once passed, the reflected light 23 of the laser film 20 is not recognized by the light receiving portion 30 until it passes through the center of the sphere. That is, the reflected light 23 of the laser reflected by the object OJ is directed toward the screen 10 until the center of the object OJ passes through the laser film 20.

However, as soon as the center of the object OJ passes through the laser film 20, the reflected light 23 reflected on the surface of the object OJ starts to be recognized by the light receiving unit 30.

4B to 4D, the diameter of the reflected light 23 gradually decreases while the object OJ passes through the laser film 20.

Referring to FIG. 4E, when all of the images of FIGS. 4A to 4D are represented on one screen, the reflected light 23 is represented by concentric circles. That is, if the object OJ continuously photographs the process of passing through the laser film 20, it may be expressed in the form of a plurality of concentric circles, thereby increasing the amount of received light of the reflected light 23 that can be recognized by the light receiver 30. . In this way, the ability to recognize coordinates can be improved.

The continuous screen as shown in FIG. 4E may be a combination of a plurality of instant images, or may be one image. For example, the same effect can be achieved with one screen having a long exposure time. Therefore, the light receiving unit 30 may be used not only a camera capable of capturing an image of a necessary moment, but also various types of light receiving devices such as a camera capable of capturing video. That is, the light receiver 30 may measure the continuous cumulative image of the reflected light 23 of the object OJ by adjusting the exposure time.

Meanwhile, referring to FIG. 5, the distance d between the screen 10 and the laser film 20 is preferably set to be 0.5 to 1 times the diameter D of the object OJ.

As described above, the reflected light reflected by the object OJ is recognized by the light receiving unit 30 from the time when the center of the object OJ passes. Therefore, in the structure in which the laser film 20 is disposed between the screen 10 and the light receiving portion 30, the distance d between the screen 10 and the laser film 20 is at least the diameter D of the object OJ. It should be at least 0.5 times of.

On the other hand, if the distance d between the screen 10 and the laser film 20 becomes too large, the position of the object OJ incident on the screen 10 and the object OJ bounced back to the screen 10 Will be different from each other. Therefore, the light receiver 30 photographs the reflected light at different positions. In this case, some errors may occur in the image processing process for recognizing the coordinates of the reflected light. Therefore, it is preferable to appropriately adjust the distance d between the screen 10 and the laser film 20 so that the position of the reflected light captured by the light receiving unit 30 can be recognized as one point.

However, as shown in the following embodiment, the screen 10 is disposed in the middle of the laser film 20 and the light receiving unit 30, that is, the reflected light of the laser film 20 is measured on the back of the transparent screen 10. In this case, the distance between the screen 10 and the laser film 20 can be set to 0.5 times or less of the diameter of the object OJ.

Hereinafter, a process of recognizing an object using an invisible light laser film will be described in detail with reference to FIG. 6.

6 is a schematic view for explaining a light receiving principle of a coordinate recognition device using an infrared laser film.

Coordinate recognition apparatus according to an embodiment of the present invention may use a laser film of invisible light. Invisible light laser means a laser using light of a wavelength band which cannot be directly recognized by the human eye. The laser is an amplified single wavelength light beam having excellent straightness, and an invisible light laser is, for example, an infrared laser.

As shown in FIG. 6, a planar laser film 20 made of an infrared laser is formed on the front surface of the screen 10. When the object OJ passes through the laser film 20, the infrared laser light reflected by the object OJ is incident to the light receiving unit 30. In this case, various visible rays reflected by the screen 10 or the object OJ are incident to the light receiving unit 30 together.

The light receiving unit 30 includes a visible light blocking filter 33, a lens 32, and a light receiving element 31. Visible light and infrared light incident on the light receiving unit 30 are first incident on the visible light blocking filter 33. Here, the visible light cut filter 33 selectively transmits infrared rays. Therefore, the infrared reflected light passes through the visible light blocking filter 33 and the lens 32 in order and is incident on the light receiving element 31.

As such, when the laser film 20 using the invisible light is used, visible light incident on the light receiving unit 30 may be blocked, and the visible light incident on the screen 10 and the reflected light of the object OJ may be separated and processed. There is an advantage that it can. As such, by blocking the surrounding light and processing only the reflected light reflected by the object OJ, the reliability of the image processing may be improved.

Referring to FIG. 7, a process of converting a recognition image of a light receiver and converting coordinates will be described in detail.

First, referring to FIG. 7A, an image photographed by the light receiver 30 may be a distorted image according to the photographing angle of the light receiver 30. For example, when the light receiving unit 30 is photographed obliquely downward from the upper portion of the screen 10 and the laser film 20, the upper portion, which is a near portion of the screen 10 region, is enlarged as shown in FIG. 7A. And a relatively far lower end is photographed small. As such, the distorted image may be corrected to the actual screen area as shown in FIG. In other words, a relatively large or narrow portion can be proportionally enlarged or reduced in proportion to the original screen area.

As illustrated in FIG. 7B, the coordinates of the reflected light may be accurately calculated in the corrected image.

<Coordinate recognition method I>

Referring to FIG. 8, a coordinate recognition method according to an embodiment of the present invention will be described.

The coordinate recognizing method according to an embodiment of the present invention is a coordinate recognizing method applied to the above-described coordinate recognizing apparatus, and the detailed configuration and method are as described above.

In summary, a coordinate recognition method is obtained. First, an image of laser reflected light reflected by an object is obtained (S110). In other words, the process of passing the object through the laser film. In this case, the captured image may be a visible light image or an invisible light image.

Also, the captured image may be a still image or a moving image.

Subsequently, the reflected light is determined from the captured image (S120). That is, the laser reflected light reflected by the object for the coordinate measurement except for the other image from the photographed image is determined.

Next, the position of the reflected light is converted into coordinates (S130). At this time, if the captured image is distorted, after converting to match the ratio of the actual screen, the position of the reflected light is converted into coordinates.

Coordinate Recognition Device II >

Hereinafter, a coordinate recognition apparatus according to a second embodiment of the present invention will be described in detail with reference to FIG. 9. 9 is a schematic structural diagram of a coordinate recognition apparatus according to a second embodiment of the present invention.

The coordinate recognizing apparatus 1a according to the second embodiment of the present invention includes a sensor unit 50 and a control device 60. When the object OJ contacts the screen 10, the coordinates of the object OJ may be adjusted. Driven in a recognized manner.

Specifically, the sensor unit 50 and the control device 60 are added to the coordinate recognition apparatus of the first embodiment described above. However, the control device 60 is connected to the sensor unit 50 and has a function of determining and calculating coordinates. The control device 60 also has a calculation function and controls the image projection device 40 in the first embodiment. May be included.

The sensor unit 50 is used to determine whether the object OJ is in contact with the screen 10, and various vibration sensors may be used. For example, at least one of a piezo sensor, an acceleration sensor, an optical sensor, and an optical cable sensor may be used. Such sensors are devices that can measure the occurrence of fine vibrations or displacements of the screen 10. In addition to these, various sensors may be used as long as they can measure the fine displacements of the screen 10.

The control device 60 receives and processes a signal from the sensor unit 50, receives and stores an image of the light receiving unit 30, processes it, sends an image signal to the image projector 40, and generates a laser film generating unit. All control operations such as control can be performed. The control device 60 may be, for example, a computer terminal or the like, and may perform general matters regarding a coordinate recognition process to be described later.

<Coordinate recognition method II >

Hereinafter, a coordinate recognition method according to a second embodiment of the present invention will be described in detail with reference to FIG. 10. 10 is a flowchart illustrating a coordinate recognition process of the coordinate recognition apparatus of FIG. 9.

First, the image of the laser reflected light reflected by the object is obtained (S210). In other words, the process of passing the object through the laser film. In this case, the captured image may be a visible light image or an invisible light image. Also, the captured image may be a still image or a moving image.

Subsequently, the captured image is stored in the memory (S220). That is, images of the screen and the laser film are taken and stored in the memory. In this case, since the captured image is not captured according to the singular signal, the captured image may be captured and stored in real time as a still image or a moving image. The stored image information may later be used for coordinate recognition or discarded.

Next, it is determined whether a signal is input to the sensor unit (S230). In this case, when the shock signal is input to the sensor unit, the stored image is output (S240), otherwise, the process returns to the initial process and photographs the image again.

When a signal is input to the sensor unit, an object for coordinate conversion passes through the laser film and collides with the screen. Therefore, the image stored in the memory is output for the coordinate conversion of the object.

Subsequently, the reflected light is determined from the captured image (S250). That is, the laser reflected light reflected by the object for the coordinate measurement except for the other image from the photographed image is determined.

Next, the position of the reflected light is converted into coordinates (S260). At this time, if the captured image is distorted, after converting to match the ratio of the actual screen, the position of the reflected light is converted into coordinates.

Coordinate Recognition Device III >

Hereinafter, a coordinate recognition apparatus according to a third embodiment of the present invention will be described in detail with reference to FIGS. 11 to 13.

FIG. 11 is a schematic structural diagram of a coordinate recognition apparatus according to a third embodiment of the present invention. FIG. 12 is a schematic cross-sectional view for explaining a coordinate recognition process of the coordinate recognition apparatus of FIG. 11, and FIG. 13 is FIG. 11. A diagram for describing a coordinate conversion process of a coordinate recognition apparatus of FIG.

First, referring to FIG. 11, the coordinate recognition apparatus 1b according to the third embodiment of the present invention uses a plurality of laser films 20. Specifically, as described above, the laser film 20 is disposed to be horizontally spaced apart from the screen 10 by a predetermined interval. However, the laser film 20 may include the first laser film 20 and the second laser film 20 to recognize the coordinates of the object OJ at different positions. Therefore, the trajectory or speed of the object OJ can be calculated using the reflected light reflected by the first laser film 20 and the second laser film 20, respectively.

Referring to FIG. 12, the first laser film 20 and the second laser film 20 form a horizontal plane with each other and are spaced apart from the screen 10 by a predetermined distance. When the first laser film 20, the second laser film 20 and the screen 10 are arranged in sequence, the image by the first laser film 20 can obtain the intermediate step coordinates of the object (OJ) The image of the second laser film 20 may obtain the coordinates of the final stage colliding with the screen 10. Therefore, when the object OJ moves with a trajectory such as a parabola, the coordinates at the stage where the first laser film 20 and the second laser film 20 are positioned and the first laser film 20 and the second laser film are located. By calculating the speed and the like passing between the parts 20, the speed and the trajectory of the object OJ can be predicted.

By predicting the trajectory and speed of the object OJ in this manner, the predicted image after the object OJ collides with the screen 10 can be projected onto the screen 10. That is, the augmented reality technology can be improved by properly expressing the real trajectory and the predicted trajectory of the object OJ in the real world and the virtual world.

Referring to FIG. 13, an image photographed by the first laser film 20 is shown in FIG. 13A, and an image photographed by the second laser film 20 is shown in FIG. 13B. Each distorted image is transformed to calculate respective coordinates through the conversion process as described above.

Coordinate Recognition Device IV >

Hereinafter, a coordinate recognition apparatus according to a fourth embodiment of the present invention will be described in detail with reference to FIGS. 14 and 15.

FIG. 14 is a schematic structural diagram of a coordinate recognition apparatus according to a fourth embodiment of the present invention, and FIG. 15 is a schematic side view for explaining a coordinate recognition process of the coordinate recognition apparatus of FIG. 14.

The coordinate recognition device 1C according to the fourth embodiment of the present invention can be used as a touch screen having a large-area screen, even if the user P is located in front of the laser film 20. The position of the light receiver 30 is disposed on the side of the screen 10 so that the image can be taken.

Specifically, the coordinate recognizing apparatus 1 may be used for a large area touch screen. In this case, the distance between the screen 10 and the laser film 20 may be made very small so that the coordinates are recognized only when a part of the user's body touches the screen 10.

As described above, in order to increase the reliability of the touch, the density of the laser film 20 may be increased using as many laser film generators as possible. The light receiver 30 may be disposed to be substantially close to the laser film 20. As such, when the light receiver 30 is disposed in close proximity to the laser film 20, the amount of distortion of the photographed image is increased, but when the photographed image is corrected as described above, the touched coordinates may be recognized. However, in order to accurately recognize the coordinates touched on the screen 10, it is preferable to provide a plurality of light receiving units 30. For example, although the light receiver 30 is installed in two lower left and upper right portions of the screen 10 in FIG. 14 and FIG. 15, more light receivers 30 may be installed depending on the size or the photographing angle of the screen 10. There will be.

In addition, the coordinate recognition device 1c acts as a touch screen capable of multi-touch. Even if a plurality of touch points are recognized in the laser film 20, the coordinates of all the points may be recognized. Therefore, a touch using two fingers or both hands is possible, and a plurality of personnel can work using one screen.

<Coordinate recognition device V>

Hereinafter, a coordinate recognition apparatus according to a fifth embodiment of the present invention will be described in detail with reference to FIG. 16.

FIG. 16 is a schematic diagram of a device for explaining a coordinate recognition process according to a fifth embodiment of the present invention.

In the coordinate recognition device 1d according to the fifth embodiment of the present invention, the screen 10 is disposed between the laser film 20 and the light receiving unit 30. That is, the light receiver 30 photographs the reflected light from the opposite side touched by the user P.

In detail, when the screen 10 is formed of a transparent or translucent material, when the user P touches the laser film 20, the laser reflected light may penetrate the screen 10 to be incident on the light receiving unit 30. have. That is, the light receiving unit 30 may photograph the laser film 20 behind the transparent or translucent screen 10. As such, when the light receiving unit 30 is disposed behind the screen 10, the visual field can be prevented from being disturbed by the user P, and the coordinate recognition device having high reliability using the small light receiving unit 30 can be prevented. (1d) can be obtained.

Naturally, such a coordinate recognition device 1d can be used not only for a large area touch screen but also as a device for recognizing coordinates of a moving object used in the above-described embodiment.

Coordinate Recognition Device VI

Hereinafter, a coordinate recognition apparatus according to a sixth embodiment of the present invention will be described in detail with reference to FIG. 17.

17 is a schematic structural diagram of a coordinate recognition apparatus according to a sixth embodiment of the present invention.

The coordinate recognizing apparatus 1e according to the sixth embodiment of the present invention includes an anti-reflection member 80 to increase the reliability of the light receiving unit 30 and includes a conveying device 70 that facilitates movement of the object OJ. Include. Specifically, the coordinate recognition apparatus 1 according to the sixth embodiment of the present invention is a device that can be used in a place such as an indoor golf course or a baseball field, and accurately recognizes the coordinates of the moving object OJ and projects the projected object ( The conveying device 70 is included so that the OJ can be returned again.

On the other hand, the antireflection member 80 protruding from the ceiling, the floor, or the wall surface is provided adjacent to the laser film 20. The anti-reflection member 80 is to prevent the laser film 20 from being reflected on the ceiling, the floor, or the wall to be incident on the light receiver 30, and serves to improve the reliability of the recognized coordinates.

The anti-reflection member 80 may be formed to cover the remaining area except for the effective area recognized by the light receiving unit 30. Therefore, the anti-reflection member 80 may be variously changed according to the application and the place where it is applied.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1, 1a, 1b, 1c, 1d, 1e: coordinate recognition device
10: screen 20: laser membrane
23: reflected light
21, 21a, 21b, 21c, 21d: laser film generating unit
30: light receiving unit 31: light receiving element
32: lens 33: visible light filter
40: image projection device 50: sensor
60: control unit

Claims (19)

delete screen;
At least one laser film generating unit generating a laser film in a plane spaced apart from the screen; And
At least one light receiving unit that recognizes the reflected light of the laser film reflected by the object passing through the laser film,
And a plurality of laser film generating units to form one laser film on the same plane. screen;
At least one laser film generating unit generating a laser film in a plane spaced apart from the screen; And
At least one light receiving unit that recognizes the reflected light of the laser film reflected by the object passing through the laser film,
And a plurality of laser film generating units to form a plurality of laser films on different planes. screen;
At least one laser film generating unit generating a laser film in a plane spaced apart from the screen; And
At least one light receiving unit that recognizes the reflected light of the laser film reflected by the object passing through the laser film,
And the laser film generating unit forms a laser film of invisible light. 5. The method of claim 4,
The light receiving unit further comprises a visible light blocking filter. screen;
At least one laser film generating unit generating a laser film in a plane spaced apart from the screen; And
At least one light receiving unit that recognizes the reflected light of the laser film reflected by the object passing through the laser film,
And a distance between the screen and the laser film is 0.5 to 1 times the diameter of the object. screen;
At least one laser film generating unit generating a laser film in a plane spaced apart from the screen; And
At least one light receiving unit that recognizes the reflected light of the laser film reflected by the object passing through the laser film,
And the screen is disposed between the laser film and the light receiving portion. The method of claim 7, wherein
And a distance between the screen and the laser film is no more than 0.5 times the diameter of the object. The method of claim 7, wherein
The screen is a coordinate recognition device formed of a transparent or translucent material. screen;
At least one laser film generating unit generating a laser film in a plane spaced apart from the screen; And
At least one light receiving unit that recognizes the reflected light of the laser film reflected by the object passing through the laser film,
Coordinate recognition device further comprises a sensor for detecting the vibration of the screen. The method of claim 10,
The sensor unit includes at least one of a piezo sensor, an acceleration sensor, an optical sensor, an optical cable sensor. screen;
At least one laser film generating unit generating a laser film in a plane spaced apart from the screen; And
At least one light receiving unit that recognizes the reflected light of the laser film reflected by the object passing through the laser film,
And the light receiving unit is continuously exposed while the object passes through the laser film. screen;
At least one laser film generating unit generating a laser film in a plane spaced apart from the screen; And
At least one light receiving unit that recognizes the reflected light of the laser film reflected by the object passing through the laser film,
The screen and the laser generator is disposed in the room consisting of a ceiling, a floor and a wall,
And an anti-reflection member protruding from at least one of the ceiling, the floor and the wall surface and adjacent to the laser film.
delete Obtaining an image of the object passing through the laser film;
Determining the reflected light of the laser film reflected by the object in the image; And
Converting the position of the reflected light into coordinates
Including,
The determining of the reflected light may include detecting the reflected light to determine the reflected light by outputting the image stored in a memory. Obtaining an image of the object passing through the laser film;
Determining the reflected light of the laser film reflected by the object in the image; And
Converting the position of the reflected light into coordinates
Including,
The acquiring the image may include acquiring an image by continuous exposure while the object passes through the laser film. Obtaining an image of the object passing through the laser film;
Determining the reflected light of the laser film reflected by the object in the image; And
Converting the position of the reflected light into coordinates
Including,
The laser film is disposed such that a plurality of laser films overlap each other on different planes, and the acquiring of the image includes: acquiring an image of a first laser film among the plurality of laser films and the plurality of laser films; And a second image acquiring step of acquiring an image of the second laser film. 18. The method of claim 17,
The converting of the coordinates may further include calculating a trajectory or speed of the object by converting coordinates of the reflected light by the image of the first laser film and the image of the second laser film. Obtaining an image of the object passing through the laser film;
Determining the reflected light of the laser film reflected by the object in the image; And
Converting the position of the reflected light into coordinates
Including,
The acquiring of the image may include acquiring an image in which the reflected light of the laser film passes through the screen.

Images