Patent Application
20150055096
The present invention relates to a theater parameter management apparatus and method, and more specifically, to a theater parameter management apparatus and method, which can create parameters related to the structure or characteristics of a theater and utilize the created parameters in a data processing procedure (e.g., image correction, simulation of a view of showing an image or the like) related to operation of a multi-projection system.
Conventionally, in order to play back an image such as a movie, advertisement or the like in a theater, a two-dimensional image is projected on a single screen placed on the front side of the theater. However, the audience has no choice but to watch only the two-dimensional (2D) image in such a system.
Recently, techniques related to 3D images have been developed to provide images having a sense of depth to the audience, and the 3D image techniques use a principle of feeling a sense of depth even from a planar image if different images respectively enter left and right eyes of a person and merge together in the brain, in which two cameras having different polarized light filters are used when an image is taken, and a user wears glasses or the like having polarized light filters when watching the image so that different images may enter the left and right eyes.
However, although the 3D technique may provide an image having a sense of depth to a user, there is a limit in that it is difficult to be absorbed in the image itself since it is merely watching an image played back on a single screen. In addition, there is also a limit in that the direction of the sense of depth felt by the audience is restricted to the direction where the single screen exists. In addition, since the conventional 3D technique requires the audience to wear glasses or the like having polarized light filters when watching an image, it is inconvenient for the audience who watch the image, and since different images are artificially and forcibly injected into the left and right eyes, sensitive audience may feel dizzy or nausea.
Accordingly, a so-called ‘multi-projection system’ which can solve the problems of the conventional projection system based on a single screen has been proposed, and the ‘multi-projection system’ mentioned here means a technique capable of providing a sense of depth and a sense of immersion to the audience by arranging a plurality of projection surfaces around the audience seats and playing back an image having a sense of unity on the plurality of projection surfaces.
Meanwhile, in order to efficiently perform a data processing operation (e.g., image correction, simulation of a view of showing an image or the like) related to the operation of the ‘multi-projection system’, a technique of creating information on the ‘structure of a theater’ and utilizing the information for data processing is needed. It is since that because the ‘multi-projection system’ should implement a plurality of projection surfaces unlike a conventional projection system which includes only a single projection surface, the system should be constructed in a different form according to the ‘structure of a theater’ and should perform a different data processing operation (e.g., image correction, simulation of a state of showing an image or the like) according to the ‘structure of a theater’.
However, in a conventional projection system installing only a single screen, such a technique does not exist.
Accordingly, in relation to the operation of the ‘multi-projection system’, a technique capable of creating information related to the structure of a theater and utilizing the created information for a variety of data processing operations is required.
Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to create parameters related to the structure or characteristics of a theater and utilize the created parameters in a data processing procedure.
Another object of the present invention is to perform a data processing operation (e.g., an image processing process, simulation of a view of showing an image or the like) related to the operation of a multi-projection system based on the parameters showing the structure or characteristics of a theater.
To accomplish the above objects, according to one aspect of the present invention, there is provided a theater parameter management apparatus including: a parameter creation unit for creating parameters showing a structure of a theater based on input information; a database for storing the parameters created by the parameter creation unit; and a data processing unit for performing a data processing using the parameters stored in the database.
In addition, the theater is a multi-projection theater for providing images through a plurality of projection surfaces, and the data processing unit creates or corrects the images to be played back on the plurality of projection surfaces using the parameters stored in the database.
In addition, the theater is a multi-projection theater for providing images through a plurality of projection surfaces, and the data processing unit simulates a view of providing the images through the plurality of projection surfaces using the parameters stored in the database.
In addition, the plurality of projection surfaces includes a main screen and structure surfaces.
In addition, the parameter creation unit creates a parameter showing a size of the theater, a parameter showing arrangement of a main screen, a parameter showing arrangement of audience seats, or a parameter showing arrangement of projectors.
In addition, the parameter showing a size of the theater includes a parameter showing a width of the theater, a parameter showing a height of the theater, and a parameter showing a depth of the theater.
In addition, the parameter showing arrangement of a main screen includes a parameter showing a ratio of the main screen, a parameter showing a screen top offset of the main screen, a parameter showing a screen left offset of the main screen, and a parameter showing a screen right offset of the main screen.
In addition, the parameter showing arrangement of audience seats includes a parameter showing a front depth of the audience seats, a parameter showing a rear depth of the audience seats, and a parameter showing a rear height of the audience seats.
In addition, the parameter showing arrangement of the projectors includes a parameter showing the number of projectors arranged in a first row, a parameter showing the number of projectors arranged in a second row, a parameter showing the number of projectors arranged in a third row, and a parameter showing the number of projectors arranged in a fourth row.
In addition, the parameter creation unit creates parameters showing a material or a color of a projection surface.
In addition, the data processing unit corrects an image projected on the main screen or an image projected on a structure surface considering information on difference of color or difference of material between the main screen and the structure surface.
In addition, the data processing unit corrects images projected on structure surfaces considering difference of color or difference of material between the structure surfaces.
In addition, the input information is information transferred from a scanner, information transferred from a camera or information transferred from an input device.
In addition, the scanner scans a physical structure of the theater using laser, X-ray, white light or infrared light.
According to another aspect of the present invention, there is provided a theater parameter management method including the steps of: (a) receiving information related to a structure of a theater by a theater parameter management apparatus; (b) creating parameters showing the structure of the theater based on the input information by the theater parameter management apparatus; (c) storing the created parameters by the theater parameter management apparatus; and (d) performing a data processing using the stored parameters by the theater parameter management apparatus.
In addition, after being implemented in the form of a program, the theater parameter management method can be recorded in a recoding medium that can be read by an electronic device.
The present invention may create parameters showing the structure or characteristics of a theater related to construction of a multi-projection system. Accordingly, a data processing operation (e.g., image correction, simulation of a state of showing an image or the like) related to the operation of the multi-projection system can be effectively performed based on the parameters created like this.
Furthermore, the present invention may standardize and quantify the information related to construction of a multi-projection system based on the created parameters. Accordingly, the present invention may generally manage a plurality of multi-projection theaters in which a multi-projection system is constructed based on the parameters and create and correct an image to be played back in each multi-projection theater from a remote site.
Furthermore, the present invention may create parameters showing the structure or characteristics of a theater while being connected to a scanner, a camera and the like. Accordingly, accuracy of the created parameters can be improved, and accuracy of data processing (simulation, image processing and the like) based on the parameters also can be improved.
Furthermore, the present invention may recognize characteristics of each projection surface based on the created parameters and correct an image in a form optimized to each projection surface based on the recognized information. Accordingly, an image of a high sense of immersion can be implemented on each projection surface.
Furthermore, the present invention may recognize a relative difference of characteristics in a plurality of projection surfaces based on the created parameters and perform an image correction process in a direction of offsetting the recognized difference of characteristics. Accordingly, a sense of difference of the images played back on a plurality of projection surfaces can be reduced through such data processing.
Furthermore, the present invention may reflect the real structure and characteristics of a theater in the data processing procedure of a simulation as is based on the created parameters. Accordingly, a view of playing back specific image contents in a specific multi-projection theater can be simulated (simulation of predicting a state of showing an image) with maximized accuracy.
Hereinafter, a ‘theater parameter management apparatus and method’ according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. The described embodiments are provided to make the technical spirits of the present invention easily understood by those skilled in the art, and the present invention is not limited thereby. In addition, the elements expressed in the accompanying drawings are figures drawn to easily explain the embodiments of the present invention and may be different from actually implemented forms.
Meanwhile, the components expressed below are merely examples for implementing the present invention. Accordingly, other components can be used in other implements of the present invention without departing from the spirits and scope of the present invention. In addition, although each component can be implemented only in a pure hardware or software configuration, it also can be implemented by combining various hardware or software configurations performing the same function.
In addition, the expression of ‘including’ an element is an ‘expression of an open type’ which merely refers to existence of a corresponding component, and it should not be construed as precluding additional components.
When a component is referred to as being ‘connected’ or ‘coupled’ to another component, it may be directly connected or coupled to the other component, but it should be understood that intervening other component may exist.
Hereinafter, a ‘multi-projection system’, which is the basis of the present invention, is briefly described, and then the present invention is described in detail.
A multi-projection system, which is the basis of the present invention, means a technique capable of providing images synchronized with each other through a plurality of projection surfaces installed in a single-screen theater and maximizing a sense of reality, a sense of depth and a sense of immersion that the audience may feel from the image in such an environment. That is, the multi-projection system means a system capable of installing a plurality of projection surfaces in a single-screen theater and providing a synchronized image to the audience through the plurality of projection surfaces.
The plurality of projection surfaces is multiple projection surfaces installed in a single-screen theater for multi-projection. A plurality of images is played back on the plurality of projection surfaces, and, here, the images played back on the plurality of projection surfaces are preferably synchronized with each other and form an image having a sense of unity as a whole. That is, although a different image can be played back on each of the projection surfaces, it is preferable to associate the images on the projection surfaces and form an image having a sense of unity from the overall view of the plurality of projection surfaces.
In addition, the plurality of projection surfaces may be arranged not to be parallel to each other. A conventional technique is a method of projecting an image only on a screen arranged on the front side of a theater so that the audience may watch the image played back on a two-dimensional screen or a method of applying a 3D technique to an image itself played back on a plane, whereas, in contrast to the conventional technique, the multi-projection system, which is the basis of the present invention, arranges a plurality of projection surfaces three-dimensionally and not to be parallel to each other so that a sense of depth and a sense of immersion may be provided to the audience through the plurality of three-dimensionally arranged projection surfaces although a 3D technique or the like is not applied to the image itself.
In addition, the plurality of projection surfaces is preferably arranged in a form surrounding the audience seats in the theater. Accordingly, the audience may feel surrounded within a space created by an image, through the image having a sense of unity implemented through the plurality of projection surfaces, and, accordingly, a sense of depth, a sense of immersion and a sense of virtual reality felt by the audience can be maximized.
In addition, an angle created by the plurality of projection surfaces is not limited to a specific angle, and the projection surfaces can be arranged at a variety of angles as long as the audience feels a sense of depth.
In addition, although the plurality of projection surfaces can be arranged in a form combined and adjacent to each other or in a form spaced apart from each other, it is preferable even in this case to arrange the plurality of projection surfaces in a form surrounding the audience seats (in a form opposing the audience seats).
The view shown in
In addition, the plurality of projection surfaces can be configured of various kinds projection surfaces such as a screen, a structure surface (a wall, a bottom, a ceiling or the like) and the like and may include different kinds of projection surfaces at the same time.
In addition, the images projected on the plurality of projection surfaces can be projected by two or more projectors installed in a theater, and the two or more projectors can be implemented in a variety of ways in a form including an optical system and a heat generating unit. For example, the projectors can be implemented through a method using a Cathode Ray Tube (CRT), a method using a Liquid Crystal Display (LCD), a Digital Light Processing (DLP) method using a Digital Micromirror Device (DMD) chip, a Liquid Crystal on Silicon (LcoS) method or the like, and it can be implemented in a variety of ways other than these methods. In addition, the two or more projectors can be integratedly controlled by a theater management apparatus (e.g., a theater management server) after being electrically connected to the theater management apparatus and may project images on the plurality of projection surfaces under the control of the theater management apparatus.
Hereinafter, a theater parameter management apparatus 100 according to an embodiment of the present invention will be described with reference to
Referring to
Here, the input device 210 is a device for receiving information from a user and can be implemented in a variety of devices including a keyboard, a keypad, a touch screen and the like.
In addition, the scanner 220 is a device for measuring and recognizing a physical structure of a theater using a variety of scanning means such as laser, X-ray, white light, infrared light and the like, converting the measured and recognized information into a data form that can be read by an electronic device, and transmitting the converted data.
In addition, the camera 230 is a device for photographing the internal structure of a theater from a plurality of directions, creating a plurality of image data based on the photographing action, and transmitting the created image data.
Meanwhile, the theater parameter management apparatus 100 may compositely utilize the information transmitted from the input device 210, the scanner 220 and the camera 230 in the process of creating parameters and may further improve accuracy of creation of parameters through the information.
In addition, in some embodiments, the theater parameter management apparatus 100 may be configured together with the input device 210, the scanner 220 and the camera 230 in one piece.
In addition, referring to
Here, although the theater parameter management apparatus 100 can be connected to projectors installed in a ‘single-screen theater’, preferably, it can be connected to projectors installed in a ‘plurality of theaters’ (for reference, in this case, the ‘connection’ does not mean only a direct connection through a wired or wireless means, but is a concept including indirect connections through a server, a relay or the like). In addition, if the theater parameter management apparatus 100 is connected to the ‘plurality of theaters’, it may create and correct an image for each of the theaters using the parameters created for each theater and transmit the created and corrected image to each of the theaters.
Meanwhile, although the ‘plurality of theaters’ may be a theater in which a ‘projection system of a single projection surface’ is constructed, preferably, it can be a theater in which the ‘multi-projection system’ described above is constructed.
In addition, although it is not shown in detail in
For example, the theater parameter management apparatus 100 according to an embodiment of the present invention may predict and simulate various views of projecting images in a variety of theaters using the created parameters (e.g., a view of playing back single image contents at different theaters, a view of playing back different image contents at a single theater, and the like) and visually provide a result of the simulation through the user terminal or the display device.
Hereinafter, the configuration of the theater parameter management apparatus 100 according to an embodiment of the present invention will be described with reference to
Referring to
The parameter creation unit 110 is a configuration for creating parameters showing the structure and characteristics of a theater based on input information. Specifically, the parameter creation unit 110 may create various parameters related to the structure and characteristics of a theater, including a parameter showing a size of a theater, a parameter showing arrangement of a main screen, a parameter showing arrangement of audience seats, a parameter showing arrangement of projectors, a parameter showing a material of a projection surface, a parameter showing a color of a projection surface, a parameter showing a projection position of a scope image and the like.
The ‘parameter showing a size of a theater’ is a parameter for expressing the overall structure or size of a theater. Such a ‘parameter showing a size of a theater’ may be configured differently depending on whether or not the structure of the theater is a standard structure, and, here, the standard structure means that a structure of a theater is formed in a structure similar to a rectangular box as shown in
First, if the structure of a theater is a standard structure, the ‘parameter showing a size of a theater’ may be configured in a form including only a parameter showing the width of the theater, a parameter showing the height of the theater, and a parameter showing the depth of the theater. It is since that because the overall structure of the theater is in a shape of a rectangular box, the entire size of the theater and the size of each structure surface (the front side, the left side, the right side, the ceiling and the like) can be specified by the three parameters. For reference, these parameters can be confirmed through
Next, if the structure of a theater is not a standard structure, the ‘parameter showing a size of a theater’ may be configured in a form including a parameter showing the shape of each structure surface, a parameter showing the individual size of each structure surface, and a parameter showing angles between the structure surfaces. It is since that if the structure of a theater is not a standard structure, each structure surface may be formed in a shape other than a rectangle, and the angles between the structure surfaces may not be a right angle, and thus the individual shape and size of each structure surface and the angles between the structure surfaces should be specified in order to identify the overall structure or size of the theater. Referring to
The ‘parameter showing arrangement of a main screen’ is preferably a parameter for expressing an arrangement state of a main screen installed on the front side of a theater. As is confirmed in
The ‘parameter showing arrangement of audience seats’ is a parameter for expressing a state of arranging audience seats with respect to the left and right side walls. As is confirmed in
The ‘parameter showing arrangement of projectors’ is a parameter for expressing a state of arranging projectors installed in a theater. The ‘parameter showing arrangement of projectors’ can be individually created for each projection surface (the main screen, a structure surface or the like) and may show information on the number of rows of projector groups arranged on a specific projection surface and the number of projectors arranged in each row.
The ‘parameter showing a material of a projection surface’ is a parameter for expressing a material of a projection surface (the main screen, a structure surface or the like). The ‘parameter showing a material of a projection surface’ may include a parameter symbolizing a unique material of a projection surface or a parameter showing reflectivity or brightness according to a material of a projection surface. In addition, the ‘parameter showing a material of a projection surface’ can be individually created for each of the plurality of projection surfaces.
The ‘parameter showing a color of a projection surface’ is a parameter for expressing a color of a projection surface (the main screen, a structure surface or the like). The ‘parameter showing a color of a projection surface’ may include a parameter showing a red (R) color level of a projection surface, a parameter showing a green (G) color level of a projection surface, a parameter showing a blue (B) color level of a projection surface, a parameter showing a red (R) chromaticity level of a projection surface, a parameter showing a green (G) chromaticity level of a projection surface, a parameter showing a blue (B) chromaticity level of a projection surface and the like. In addition, the ‘parameter showing a color of a projection surface’ can be individually created for each of the plurality of projection surfaces.
The ‘parameter showing a projection position of a scope image’ is a parameter showing, in the case where the main screen of a theater is a flat screen (a screen of a ratio of 1.85:1), a position of an image when a scope image (a wide image of a ratio of 2.35:1) is projected on the flat screen. The ‘parameter showing a projection position of a scope image’ may include, as shown in
Meanwhile, the parameters described above are merely examples. Accordingly, the present invention may create a variety of parameters which can show the structure and characteristics of a theater in addition to the parameters described above.
In addition, the parameters described above may be utilized in a variety of data processing operations related to the operation of a multi-projection system as described above. For example, the parameters described above may be utilized in a variety of data processing operations including a process of processing an image for each theater or for each projector, a process of simulating a multi-projection system of each theater and the like.
The database 130 is a configuration for storing the parameters created by the parameter creation unit 110.
As shown in
In addition, the database 130 may include various types of memory devices capable of storing data and may temporarily or permanently store the parameters.
The data processing unit 150 is a configuration for performing a variety of data processing operations (simulation, image processing and the like) preferably related to the operation of a ‘multi-projection system’ using the parameters stored in the database 130. For example, the data processing unit 150 may perform a process of creating or correcting images to be played back on a plurality of projection surfaces using the parameters stored in the database 130. In addition, the data processing unit 150 may also perform a process of simulating a view of providing images through the plurality of projection surfaces using the parameters stored in the database 130 and may perform a variety of data processing operations other than these processes.
Hereinafter, representative data processing operations of the data processing unit 150 will be described.
First, when a structure surface is utilized as a projection surface, the data processing unit 150 may correct an image projected on each structure surface using the ‘parameter showing a size of a theater 131’. Specifically, the data processing unit 150 may calculate information on the size, the angle and the like of each structure surface by analyzing the ‘parameter showing a size of a theater 131’ and may correct resolution of the images or perform a warping correction on the images based on the calculated information.
In addition, the data processing unit 150 may correct an image to be projected on the main screen using the ‘parameter showing arrangement of a main screen 132’. For example, the data processing unit 150 may calculate information on the size of the main screen, information on the position of the main screen, information on the background area other than the main screen (the area on the front side except the area where the main screen is arranged) and the like by analyzing the ‘parameter showing arrangement of a main screen 132’, and the data processing unit 150 may correct the size, the ratio and the resolution of an image projected on the main screen based on the calculated information.
On the other hand, in some embodiments, an image can be projected in a ‘background area other than the main screen’, as well as the ‘main screen area’, in order to implement a multi-projection environment in which a sense of immersion is maximized. For example, an image can be projected even in the screen top offset area, the screen left offset area, the screen right offset area and the screen bottom offset area (not shown), as well as the main screen area shown in
In addition, the data processing unit 150 may correct images to be projected on the left side wall and the right side wall using the ‘parameter showing arrangement of audience seats 133’. Specifically, the data processing unit 150 may calculate information on the formation and scale of the audience seats arranged between the projectors and the left side wall and information on the formation and scale of the audience seats arranged between the projectors and the right side wall by analyzing the ‘parameter showing arrangement of audience seats 133’ and may utilize the calculated information in the masking correction process of the images.
In addition, the data processing unit 150 may correct and distribute an image projected on each projection surface (the main screen, a structure surface or the like) using the ‘parameter showing arrangement of projectors 134’. Specifically, the data processing unit 150 may calculate information on a projector arranged for each projection surface using the ‘parameter showing arrangement of projectors 134’, partition an image to be projected on each projection surface based on the calculated information, and allocate the image to each projector.
In addition, the data processing unit 150 may correct an image projected on each projection surface (the main screen, a structure surface or the like) using the ‘parameter showing a material of a projection surface 135’. Specifically, the data processing unit 150 may calculate information on the reflectivity, brightness and the like of each projection surface using the ‘parameter showing a material of a projection surface 135’ and may correct an image to be projected on each projection surface based on the calculated information.
Meanwhile, in this case, the data processing unit 150 may correct an image of each projection surface considering a relative difference of material among a plurality of projection surfaces. Specifically, the data processing unit 150 may correct an image projected on each projection surface considering a relative difference of material between the main screen and a structure surface (a difference of reflectivity, brightness or the like) or may correct an image projected on each projection surface considering a relative difference of material between the walls (a difference of reflectivity, brightness or the like).
For example, the data processing unit 150 may perform a correction of decreasing brightness of an image on the main screen to offset a brightness difference of 20nit when the main screen is brighter than the left side wall as much as 20nit. In addition, the data processing unit 150 may perform a correction of increasing brightness of an image on the right side wall to offset a brightness difference of 10nit when the right side wall is darker than the left side wall as much as 10nit and may perform a variety of corrections other than these corrections in order to offset the difference of material.
In addition, the data processing unit 150 may correct an image projected on each projection surface (the main screen, a structure surface or the like) using the ‘parameter showing a color of a projection surface 136’. Specifically, the data processing unit 150 may calculate information on a color or chromaticity for each of RGB of each projection surface using the ‘parameter showing a color of a projection surface 136’ and may correct an image to be projected on each projection surface based on the calculated information.
Meanwhile, in this case, the data processing unit 150 may correct an image of each projection surface considering a relative difference of color or chromaticity among a plurality of projection surfaces. Specifically, the data processing unit 150 may correct an image projected on each projection surface considering a relative difference of color or chromaticity between the main screen and a structure surface or may correct an image projected on each projection surface considering a relative difference of color or chromaticity between the walls.
For example, the data processing unit 150 may perform a correction of decreasing the R (red) chromaticity level of an image on the main screen to offset a chromaticity difference of levels when the R chromaticity level of the main screen is higher than the R chromaticity level of left side surface as much as 70 levels. In addition, the data processing unit 150 may perform a correction of increasing the B (blue) chromaticity level of an image on the right side surface to offset a chromaticity difference of 10 levels when the B chromaticity level of the right side surface is lower than the B chromaticity level of left side surface as much as 10 levels and may perform a variety of corrections other than these corrections in order to offset a difference of color or chromaticity.
In addition, the data processing unit 150 may correct an image projected on the main screen constructed in the form of a flat screen using the ‘parameter showing a projection position of a scope image’. Specifically, the data processing unit 150 may correct a size of a scope image using the ‘parameter showing a projection position of a scope image’ and may perform a control action so that the corrected image can be projected at a predetermined position of the main screen. In addition, the data processing unit 150 may recognize a background area on which the scope image is not projected among the entire area of the main screen and may insert an additional image (a caption image or the like) in a corresponding background area.
Meanwhile, the data processing unit 150 may perform a variety of data processing operations related to the operation of the multi-projection system in addition to the examples described above.
The communication unit 170 is a configuration for transmitting and receiving data to and from a variety of electronic devices. The theater parameter management apparatus 100 may transmit and receive data to and from the input device or a variety of external electronic devices through the communication unit 170.
Meanwhile, the communication unit 170 may be implemented in a variety of forms capable of transmitting and receiving data wiredly or wirelessly and may be controlled by the data processing unit 150.
Hereinafter, a theater parameter management method according to an embodiment of the present invention will be described.
First, the theater parameter management method according to an embodiment of the present invention may include a step (step a) of receiving information related to the structure of a theater by the theater parameter management apparatus.
In addition, the theater parameter management method may further include, after step a, a step (step b) of creating parameters showing the structure of the theater based on the input information by the theater parameter management apparatus.
In addition, the theater parameter management method may further include, after step b, a step (step c) of storing the created parameters by the theater parameter management apparatus.
In addition, the theater parameter management method may further include, after step c, a step (step d) of performing a data processing using the stored parameters by the theater parameter management apparatus.
Meanwhile, after being implemented in the form of a program, the theater parameter management method can be stored in a recoding medium that can be read by an electronic device or transmitted and received through a communication network. In addition, the theater parameter management method can be stored temporarily or permanently in a variety of electronic devices after being implemented in the form of a program.
Although its category is different, the theater parameter management method may include features practically the same as those of the theater parameter management apparatus according to an embodiment of the present invention. Accordingly, the features described above in relation to the theater parameter management apparatus may be easily inferred and applied to the theater parameter management method.
While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2013-0101353 | Aug 2013 | KR | national |
