KR102013450B1 - Method of providing relay content using a plurality of screens - Google Patents

Abstract

Disclosed is a relay content providing method using multiple screens. The method comprises the following steps: displaying a virtual reality space; determining one or more regions in which content is displayed at the virtual reality space; and displaying each of one or more screens obtained from the content in the determined one or more regions.

Description

Method of providing relay content using a plurality of screens}

The present invention relates to a relay content providing method using a plurality of screens.

Virtual Reality is a technology that allows people to have a realistic experience in a virtual world made of computers.

Meanwhile, a technology that combines virtual reality (VR) and augmented reality (AR), a technology that adds virtual information to the real world, is called mixed reality (MR). VR, AR, and MR are all common in that they are technologies that realize reality that does not exist so that people can recognize it. AR differs from the fact that virtual information is added to real reality and VR is presented in a fictional situation. MR provides a mixture of AR and VR to provide a mixture of real and virtual information on a reality background, and requires technology that can process large amounts of data.

HMD (Head Mount Display) is generally used for the experience of virtual reality, which is a display device mounted on the user's head for the VR experience, and serves to show the virtual world to the user's vision after blocking the user's eyes from the outside. Do it. It can be equipped with a microphone, stereo speakers and other sensors in the form of a face that faces the display in front of you.

Publication No. 10-2017-0054754, published May 18, 2017

The problem to be solved by the present invention is to provide a relay content providing method using a plurality of screens.

Problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention for solving the above problems, a method of providing relay content using a plurality of screens may include: displaying a virtual reality space, and determining one or more regions in which the content is to be displayed in the virtual reality space. And displaying each of one or more screens obtained from the content in the determined one or more areas.

The determining of the one or more regions may include determining the number of regions in which the content is to be displayed and determining the determined number of regions.

The displaying of each of the screens may include obtaining the determined number of screens from the content and displaying the obtained screens on the determined number of regions, respectively.

The acquiring of the screen may include acquiring the screen based on at least one of contents of the content, information on a user who uses the virtual reality equipment, and selection of the user.

The method may further include obtaining a surrounding image of the virtual reality device and displaying the virtual reality space and the surrounding image, displaying the virtual reality space inside a preset viewing range, and displaying the surrounding image outside the viewing range. It may further comprise a step.

The displaying of the surrounding image may include detecting a gaze movement of a user using the virtual reality equipment, moving the field of view in a direction in which the line of sight of the user moves, but at a speed at which the field of view is moved. When the preset upper limit speed exists, and the user's gaze movement is faster than the upper limit speed, the peripheral image is displayed outside the viewing range until the viewing range reaches the position where the user's gaze is moved. It may include a step.

The displaying of the surrounding image may include detecting a line of sight of a user using the virtual reality device and when the line of sight of the user moves at a speed greater than or equal to a first reference value. The method may further include displaying an image and displaying the virtual reality space outside the viewing range.

The at least one area may include a first area and a second area, and the displaying of the screen may include displaying a main screen on the first area, displaying a sub screen on the second area, and The method may further include displaying the sub screen on the first area and displaying the main screen on the second area when the gaze of the user moves at a speed greater than or equal to a preset second reference value.

Other specific details of the invention are included in the detailed description and drawings.

According to the disclosed embodiment, in relaying various types of content, there is an effect of inducing the interest of the audience and providing various customized information for each audience.

Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a diagram schematically illustrating a system for displaying content using virtual reality equipment according to an exemplary embodiment.
2 is a flowchart illustrating a method of displaying content by a virtual reality device according to an exemplary embodiment.
3 is a diagram illustrating a virtual reality space according to an exemplary embodiment.
4 is a diagram for describing a method of displaying a real image and a virtual image, according to an exemplary embodiment.
FIG. 5 is a diagram illustrating a method of using a rhizome and a far-field view according to an exemplary embodiment.
6 is a block diagram of an apparatus according to an embodiment.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be embodied in various different forms, and the present embodiments only make the disclosure of the present invention complete, and those of ordinary skill in the art to which the present invention belongs. It is provided to fully inform the skilled worker of the scope of the invention, which is defined only by the scope of the claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, "comprises" and / or "comprising" does not exclude the presence or addition of one or more other components in addition to the mentioned components. Like reference numerals refer to like elements throughout, and "and / or" includes each and all combinations of one or more of the mentioned components. Although "first", "second", etc. are used to describe various components, these components are of course not limited by these terms. These terms are only used to distinguish one component from another. Therefore, of course, the first component mentioned below may be a second component within the technical spirit of the present invention.

Unless otherwise defined, all terms used in the present specification (including technical and scientific terms) may be used in a sense that can be commonly understood by those skilled in the art. In addition, terms that are defined in a commonly used dictionary are not ideally or excessively interpreted unless they are specifically defined clearly.

As used herein, the term "part" or "module" refers to a hardware component such as software, FPGA, or ASIC, and the "part" or "module" plays certain roles. However, "part" or "module" is not meant to be limited to software or hardware. The “unit” or “module” may be configured to be in an addressable storage medium or may be configured to play one or more processors. Thus, as an example, a "part" or "module" may include components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, Procedures, subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. Functions provided within components and "parts" or "modules" may be combined into smaller numbers of components and "parts" or "modules" or into additional components and "parts" or "modules". Can be further separated.

The spatially relative terms " below ", " beneath ", " lower ", " above ", " upper " It can be used to easily describe a component's correlation with other components. Spatially relative terms are to be understood as including terms in different directions of components in use or operation in addition to the directions shown in the figures. For example, when flipping a component shown in the drawing, a component described as "below" or "beneath" of another component may be placed "above" the other component. Can be. Thus, the exemplary term "below" can encompass both an orientation of above and below. Components may be oriented in other directions as well, so spatially relative terms may be interpreted according to orientation.

In the present specification, virtual reality is understood as a concept encompassing all of VR (Augmented Reality), AR (Augmented Reality), MR (Mixed Reality), the type is not limited.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram schematically illustrating a system for displaying content using virtual reality equipment according to an exemplary embodiment.

The components shown in FIG. 1 are shown by way of example, and the components of the system according to the disclosed embodiment are not limited thereto. In addition, components not shown in FIG. 1 may be further added to the system shown in FIG. 1, and some components shown in FIG. 1 may be omitted from the system shown in FIG. 1.

Referring to FIG. 1, a system according to the disclosed embodiment includes a virtual reality equipment 100 and a server 200.

In one embodiment, the virtual reality equipment 100 includes a head mount display (HMD) 110. The output device included in the virtual reality device 100 is not limited to the HMD, and various types of output devices may be used to output the virtual reality.

In one embodiment, the HMD 110 may have a built-in processing device for processing and reproducing a virtual reality image, or may be connected to an external processing device to output information received from the processing device using a display. . The external processing device may be the user terminal 120 or may be a computing device connected to the server 200. According to an embodiment, the HMD 110 may output a virtual reality image based on information received from the server 200.

According to an embodiment, the HMD may be configured to accommodate the display of the user terminal 120 by accommodating the user terminal 120 without having a built-in processing device and a display.

In one embodiment, the server 200 may be a computing device that includes at least one processor. According to an embodiment, the server 200 may mean a cloud server.

In an embodiment, the server 200 may be connected to a plurality of virtual reality devices and transmit content to each of the plurality of virtual reality devices.

Each virtual reality device 100 outputs a virtual reality image based on the content received from the server 200.

According to an embodiment of the present disclosure, the content output from the virtual reality device 100 may be a sports relay including a game relay.

In one embodiment, the system shown in Figure 1 is installed in the game relay stadium, the server 200 transmits the game relay information to the respective virtual reality equipment, the virtual reality equipment 100 is each of the game relay stadium It may be provided for each seat.

That is, the audience watching the game relay can watch the game relay in the virtual reality using the virtual reality equipment 100 provided in each seat.

In another embodiment, the audience may watch the game relay in the virtual reality using the virtual reality equipment 100 used personally without visiting the game relay stadium.

In another embodiment, a relay space using a virtual reality is provided in an external space other than the game relay stadium, and the audience may watch the relay like the audience watching the relay at the stadium using the virtual reality equipment provided in the corresponding relay space. have.

In another embodiment, the content may be a sports relay, such as soccer, but not a game relay. In this case, according to the embodiment, the virtual reality equipment 100 is provided in each seat of the sports stadium, and the audience uses the virtual reality equipment 100 to supplement the field image, the sports relay image, and the sports information of the actual stadium. Etc. can be watched through virtual reality.

In addition, virtual reality equipment is provided in the relay space outside the stadium where the actual sports game is held, and the audience can watch the broadcast together with the audience watching the relay at the stadium using the virtual reality equipment. Can be. In an embodiment, an audience in a stadium or an audience in an external relay space may select each seat of a stadium and watch a real-time image captured by the seat through virtual reality.

Therefore, the audience can feel the realism without visiting the stadium, and when the stadium is visited, the viewer can experience the view of various seats, thereby increasing the satisfaction of viewing.

Hereinafter, for convenience of description, a method of providing a game relay image to a viewer through virtual reality using the virtual reality equipment 100 disposed at each seat of the game relay stadium will be described. However, the scope of the embodiments disclosed below is not limited thereto.

2 is a flowchart illustrating a method of displaying content by a virtual reality device according to an exemplary embodiment.

Each of the steps illustrated in FIG. 2 illustrates in time series the operations performed in the virtual reality equipment 100 illustrated in FIG. 1.

In operation S110, the virtual reality equipment 100 displays the virtual reality space.

For example, the virtual reality space may represent a virtual stadium. The virtual stadium may actually be configured in the same form and structure as the stadium in which the audience is located, or may have the same structure but different shapes and designs, or may have a different structure and form than the actual stadium. The virtual reality space may be a 360 degree virtual reality space, but is not limited thereto.

In one embodiment, the virtual reality space may be displayed in the form of a room in which the relay image may be displayed. The room may be a polyhedron such as a cube, a cylinder or a sphere, and the shape thereof is not limited.

In operation S120, the virtual reality apparatus 100 determines one or more regions in which the content is to be displayed in the virtual reality space displayed in operation S110. For example, the content may be a game relay image, and one or more areas in which the content is to be displayed may be determined as a screen form in which the game relay image may be displayed, but is not limited thereto.

For example, the area in which the content is to be displayed may be determined as a polygon including a rectangle, a circle, an oval, and the like, but is not limited thereto. According to an embodiment, the area where the content is to be displayed may occupy a part of the virtual reality space, or the entire virtual reality space may be determined as the area where the content is to be displayed. For example, the game or sports relay image itself may be configured as a 360 degree image, in which case at least a portion of the virtual reality space may be used to display the 360 degree image.

For example, when the virtual reality space is spherical, the entire upper hemisphere of the hemispheres that divide the virtual reality space up and down, respectively, may be determined as an area for displaying a 360 degree image, but is not limited thereto.

When the game or sports relay image itself is composed of 360-degree images, the visual field as if the viewer is located at a game or sports event can be reproduced in the virtual reality space. For example, in the case of game relaying, a 360 degree game image may be generated at the viewpoint of one of an observer who is a third party relaying a game or a game player, and the generated 360 degree image may be displayed through the virtual reality device 100. have. In this case, the actual player can watch the video (for example, the back image of the player) that cannot be seen through the 360-degree image, so that the audience can increase the interest of viewing.

Similarly, in the case of a sports game image, a sports image photographed using a 360 degree camera may be displayed through the virtual reality device 100.

In operation S130, the virtual reality device 100 displays one or more screens acquired from the content in one or more areas determined in operation S120, respectively.

For example, even in the case of sports relay, different images (screens) may be generated according to the position of the camera. In the case of game relay, different images (screens) are generated according to each observer (non-player), and different images (screens) are generated according to each player screen. In particular, in the case of a game in which many players play at the same time, such as Battle Unknown's Battle Ground, up to 100 or more images (screens) may be generated for each player.

In this case, it is practically impossible to relay each screen using a general display, and it is only possible to relay an image acquired at the viewpoint of some players or a specific observer.

However, in this case, there are a number of images that cannot be relayed, and the viewers have a problem of watching their favorite player's play screen or internet personal broadcasting screen using a smartphone or the like rather than a relay screen of a stadium. This is different from the existing game relay represented by Starcraft, and therefore, development of a technology that can solve this problem is required.

Therefore, according to the disclosed embodiment, after displaying the virtual reality space using the virtual reality equipment 100, preparing a space for displaying one or more screens in the virtual reality space, the contents of the content (for example, Image) in the virtual reality space based on at least one of a user's preference (for example, a user's favorite player) and a user's selection (image selected by the user), a user using the virtual reality equipment 100, and the like. By displaying, it is possible to induce the audience to watch the image provided from the relay agent.

3 is a diagram illustrating a virtual reality space according to an exemplary embodiment.

Referring to FIG. 3, the virtual reality space 300 and the user 10 viewing the virtual reality space 300 are illustrated. The shape of the virtual reality space 300 is not limited to that shown in FIG. 3, but this is shown as an example for description.

Referring to FIG. 3, one or more regions 310, 320, and 330 for displaying content are illustrated in the virtual reality space 300. Each area may be divided into a main screen 310 and a sub screen 320 and 330, but is not limited thereto. The main screen 310 may be a screen positioned in front of the gaze of the user 10. The sub screens 320 and 330 may be screens positioned on the left and right sides of the user's eyes, and according to an exemplary embodiment, the sub screens may be screens located on the ceiling 340 or the floor.

While watching the main screen 310, the user 10 may view the sub-screens 320 and 330 through eye movements. According to an embodiment of the present disclosure, when the user's gaze changes by more than a preset angle to look at a specific sub screen (eg, 320), the sub screen 320 may be changed to the main screen. In this case, the image displayed on the sub screen 320 may move to the position of the main screen 310, and the image displayed on the main screen 310 may move to the position of the sub screen 320.

According to an embodiment, the number of areas where content is displayed in the virtual space 300 may be determined automatically by a user's selection. For example, the number of areas in which content is displayed in the virtual space 300 is set to three, but when a user requests to add a specific image, the image is added, and the added image is added horizontally or vertically. Can be. For example, the added image may be displayed on the left side of the sub image 320 or may be displayed on the top or ceiling of the main image 310.

The virtual reality device 100 may obtain a screen from the content as many as the determined area, and display the obtained screen in each area.

In one embodiment, not only the virtual reality space 300 but also the virtual appearance of the virtual reality device 100, that is, the inside of the stadium, may be displayed through the virtual reality device 100. In an embodiment, the virtual reality device 100 may capture a surrounding image using a camera device (depending on the embodiment, a 360 degree image may be captured using a 360 degree camera), and display the captured image. have.

That is, the virtual reality device 100 may display not only the virtual reality space 300 including the game image, but also the surrounding image of the virtual reality device 100 as a 360 degree image. Accordingly, the user 10 may experience an experience of watching an image in which reality (stadium) and virtual (game relay) are mixed.

In one embodiment, the virtual reality equipment 100 may display the virtual reality space 300 and the surrounding image by mixing or overlapping, displaying the sections separately, or displaying the sections alternately depending on the situation. The method is not limited.

4 is a diagram for describing a method of displaying a real image and a virtual image, according to an exemplary embodiment.

Referring to FIG. 4, a 360 degree region 400 is shown in which the user 10 and the user 10 can watch using the virtual reality equipment 100. In an embodiment, the 360 degree region 400 may be divided into a front 410 direction and a rear 420 direction of the user 10, and an example of the boundary 440 is illustrated in FIG. 4.

In an embodiment, the virtual reality space may be displayed in the direction of the front surface 410 of the 360 degree region 400, and the actual surrounding image may be displayed in the direction of the rear surface 420 of the 360 degree region 400.

In another embodiment, the virtual reality space is displayed in the space within the field of view 430 of the user 10 in the 360 degree area 400, and the space outside the field of view 430 of the user 10 in the 360 degree area 400. The actual surrounding image may be displayed. According to an embodiment, the images displayed in and out of the field of view 430 of the user 10 may be interchanged.

In an embodiment, the actual surrounding image may be displayed at both ends of the field of view 430 of the user 10.

In an embodiment, the field of view 430 may refer to a preset range in the virtual reality device 100.

In one embodiment, when the gaze of the user 10 moves (for example, when the user 10 turns his / her head), the gaze 430 of the user recognized by the virtual reality device 100 may also move. have. Therefore, even when the user 10 turns his / her eyes, the user 10 may watch the game relay through the virtual reality space.

According to an embodiment, when the gaze of the user 10 moves more than a predetermined angle, an actual surrounding image may be displayed in the gaze 430 of the user, and a virtual space may be displayed outside the gaze 430 of the user. Similarly, when the gaze of the user 10 moves over a preset angle again, the virtual space may be displayed in the gaze 430 of the user, and the actual surrounding image may be displayed outside the gaze 430 of the user.

In the present embodiment, the image may actually be displayed outside the user's line of sight, but displaying the image outside the line of sight of the user may be unnecessary or impossible due to the limitation of the display. When the gaze is turned in the corresponding direction, the concept may be rendered or loaded to display the corresponding image.

According to an embodiment, as the gaze of the user 10 moves, an upper limit may be set on a speed at which the gaze 430 of the user recognized by the virtual reality device 100 moves. That is, when the gaze 430 of the user 10 moves at a speed higher than or equal to a preset upper limit speed, the speed at which the gaze 430 of the user recognized by the virtual reality device 100 does not follow this, so the user 10 may view an image outside the line of sight 430 recognized by the virtual reality device 100. That is, the user 10 may watch the actual surrounding image displayed outside of the gaze 430 until the movement of the gaze 430 follows the movement of the gaze. Therefore, the user 10 may check the actual surrounding image by moving the gaze 430 faster than the preset upper limit speed.

For example, the user 10 may need to check the state of the audience sitting next to the virtual space while viewing the mobile phone or food in his hand. In this case, the user 10 may move quickly over the preset upper limit speed in the corresponding direction, so that the user 10 may check the actual surrounding image for a time before the gaze 430 moves to the position of the actual gaze.

For example, when the user wants to eat the popcorn on the right side, the user can check the position of the popcorn included in the actual surrounding image by quickly moving the gaze in the corresponding direction. The user may eat popcorn during the time that the gaze 430 follows the actual gaze (for example, about several seconds), and naturally watch the relay through the virtual space as the gaze 430 is automatically recovered. .

In another embodiment, the virtual reality device 100 may recognize the surrounding situation and control the display of the virtual space or the actual surrounding image.

For example, when the sound of a friend sitting near the user 10 calling the user 10 is detected, the virtual reality device 100 may display the actual surrounding image in the corresponding direction.

Similarly, the virtual reality device 100 detects that the user 10 extends his or her hand in a specific direction when another user or object approaches the user 10 and the user 10 is in danger of colliding with an external object. In such a case, the virtual reality device 100 may display the actual surrounding image in the direction in which the corresponding object or motion is recognized.

FIG. 5 is a diagram illustrating a method of using a rhizome and a far-field view according to an exemplary embodiment.

Referring to FIG. 5, a virtual reality space 500 as shown in FIG. 3 and a user 10 viewing the same are shown.

As shown in FIG. 3, one or more regions 510, 520, and 530 for displaying content are illustrated in the virtual reality space 500. Each area may be divided into a main screen 510 and a sub screen 520 and 530, but is not limited thereto. The main screen 510 may be a screen positioned in front of the gaze of the user 10. The sub screens 520 and 530 may be screens positioned on the left and right sides of the user's eyes, and according to an exemplary embodiment, the sub screens may be screens located on the ceiling 540 or the floor.

According to an embodiment, the virtual reality space 500 may include a root diameter 550 around the user 10 and other remote views. For example, the virtual reality space 500 may include an image displayed in the vicinity of the user 10 and other images that may be displayed when the user 10 looks at a distance.

In an exemplary embodiment, the actual surrounding image may be displayed in the root diameter 550, and the game relay image may be displayed in the other virtual reality space 500.

For example, when the user 10 looks around the lower part of the line of sight, the actual surrounding image is displayed on the root diameter 550, and when the user 10 looks around or above the line of sight, the virtual reality space 500. And a content image included therein may be displayed.

As another example, the virtual reality device 100 recognizes a focal length of the user 10, and displays a root diameter 550, that is, an actual surrounding image when the focal length of the user 10 is shorter than a preset reference value. When the focal length of 10 is longer than a preset reference value, the virtual reality space 500 and the content image included therein may be displayed. The way in which the virtual reality device 100 recognizes the focal length of the user 10 is not limited. For example, the virtual reality device 100 may recognize the eye of the user 10 in order to recognize the focal length of the user 10. It may include at least one sensor device facing.

6 is a block diagram of an apparatus according to an embodiment.

The processor 102 may include a connection passage (eg, a bus, etc.) that transmits and receives signals with one or more cores (not shown) and graphics processor (not shown) and / or other components. .

The processor 102 according to one embodiment executes one or more instructions stored in the memory 104 to perform the method described in connection with FIGS. 1-5.

For example, processor 102 displays the virtual reality space by executing one or more instructions stored in memory, determines one or more regions where content is to be displayed in the virtual reality space, and obtains one from the content in the determined one or more regions. Each of the above screens can be displayed.

Meanwhile, the processor 102 may include random access memory (RAM) and read-only memory (ROM) for temporarily and / or permanently storing a signal (or data) processed in the processor 102. , Not shown) may be further included. In addition, the processor 102 may be implemented in the form of a system on chip (SoC) including at least one of a graphic processor, a RAM, and a ROM.

The memory 104 may store programs (one or more instructions) for processing and controlling the processor 102. Programs stored in the memory 104 may be divided into a plurality of modules according to functions.

The steps of a method or algorithm described in connection with an embodiment of the present invention may be implemented directly in hardware, in a software module executed by hardware, or by a combination thereof. The software module may include random access memory (RAM), read only memory (ROM), erasable programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), flash memory, hard disk, removable disk, CD-ROM, or It may reside in any form of computer readable recording medium well known in the art.

The components of the present invention may be implemented in a program (or an application) and stored in a medium to be executed in combination with a computer which is hardware. The components of the present invention may be implemented as software programming or software elements, and likewise, embodiments may include various algorithms implemented in combinations of data structures, processes, routines or other programming constructs, such as C, C ++. It may be implemented in a programming or scripting language such as Java, an assembler, or the like. The functional aspects may be implemented with an algorithm running on one or more processors.

In the above, embodiments of the present invention have been described with reference to the accompanying drawings, but 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. I can understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

100: virtual reality equipment
110: HMD
120: user terminal
200: server

Claims (4)

In the way that the virtual reality equipment displays the content,
Displaying a virtual reality space;
In the virtual reality space, determining at least one region in which the content is to be displayed;
Displaying at least one screen obtained from the content in at least one determined area;
Acquiring a surrounding image of the virtual reality device; And
Displaying the virtual reality space and the surrounding image, displaying the virtual reality space inside a preset viewing range, and displaying the surrounding image outside the viewing range; Including,
The displaying of the surrounding image may include:
Detecting a gaze movement of a user using the virtual reality device;
Moving the viewing range in a direction in which the gaze of the user moves, wherein a preset upper limit speed exists at a speed at which the viewing range moves; And
If the user's gaze movement is faster than the upper limit speed, displaying the surrounding image outside the viewing range until the viewing range reaches a position where the user's gaze moves; Including, the method. delete According to claim 1,
The displaying of the surrounding image may include:
Detecting a gaze movement of a user using the virtual reality device; And
Displaying the surrounding image inside the viewing range and displaying the virtual reality space outside the viewing range when the user's gaze moves at a speed greater than or equal to a preset first reference value; Further comprising, the method. The method of claim 3, wherein
The at least one region comprises a first region and a second region,
Displaying the screen,
Displaying a main screen on the first area;
Displaying a sub screen on the second area; And
Displaying the sub-screen on the first area and displaying the main screen on the second area when the user's gaze moves at a speed equal to or greater than a second preset reference value; Further comprising, the method.

Images