JP7495730B2 - Virtual golf device providing multiple play modes and virtual golf system using the same - Google Patents

Description

The present invention relates to a virtual golf device and a virtual golf system using the same. More specifically, the present invention relates to a virtual golf device that provides multiple play modes so that users can play in various ways as desired, and a virtual golf system using the same.

Simulation devices have been developed that use 3D images and computer simulation technology to allow people to enjoy sports without being in the field, and virtual indoor sports such as golf and baseball have become widespread. In the case of screen golf, a representative indoor sport, an image of a golf course is displayed on a screen, giving the player the feeling of playing a real golf game outdoors, while saving time and money compared to playing on an outdoor field, making screen golf very popular among modern people who find it difficult to play golf due to time or financial reasons.

Screen golf reflects most of the various aspects of real golf in order to realistically reproduce real golf. For example, a real golf course has various types of landforms such as fairways, rough, and bunkers, and the golf course on the screen also displays various types of landforms such as fairways, rough, and bunkers. In addition, in screen golf, the hitting mat is divided into multiple areas such as a fairway-compatible area, a rough-compatible area, and a bunker-compatible area. If the area on the screen where the golf ball lands is the rough, the screen golf user can place the golf ball in the rough-compatible area of the hitting mat and hit it, thereby experiencing the feeling of hitting a golf ball that has landed in the rough in real golf.

There may be users who use screen golf with various play tendencies. For example, there may be users who wish to experience the reality of real golf to the maximum extent in screen golf, and there may be users who pursue their own enjoyment in screen golf even if the reality of real golf is reduced. For example, when a golf ball on a screen lands in a bunker, the former user may try to place the golf ball in the bunker-corresponding area of the hitting mat and hit it in order to experience the reality of real golf to the maximum extent, while the latter user may try to place the golf ball in the fairway-corresponding area of the hitting mat and hit it, thinking that the difficulty of hitting the golf ball in the bunker-corresponding area of the hitting mat is high and there is no enjoyment unique to screen golf. In this way, since each user may try to play screen golf in various ways, it is necessary to develop a system that can provide various play modes that users can select.

The present invention was invented in consideration of the above circumstances, and aims to provide a virtual golf device that offers multiple play modes that allow users to play in a variety of ways according to their preferences.

The present invention also aims to provide a virtual golf system that uses the above virtual golf device.

Furthermore, other objects of the present invention can be clearly understood from the following description and the attached drawings.

In order to achieve the above object, a virtual golf device according to an embodiment of the present invention includes a control unit that calculates the trajectory of a hit real golf ball when a user hits the real golf ball, and a display unit that displays a virtual golf ball moving along the calculated trajectory on a virtual golf course. A user can play in a first mode and a second mode that are different from each other, and the virtual golf course includes a hole cup and a flagstick placed in the hole cup, and in the first mode, the hole cup and the flagstick are all displayed, and in the second mode, only the hole cup is displayed, excluding the flagstick.

The virtual golf device further includes an input unit for inputting a user's selection so that either the first or second mode can be selected, the input unit including a means for inputting with the user's hand and/or a means for inputting with the user's foot.

In the virtual golf device, the user can select either the first or second mode during the putting stage to play.

In the virtual golf device, the control unit automatically selects or recommends to the user the mode that is most advantageous to the user from the first and second modes.

In the virtual golf device, when a user plays in the first mode and the flagstick is on the trajectory calculated by the control unit, the control unit further calculates a trajectory that is changed by the collision of the virtual golf ball moving along the trajectory with the flagstick after the virtual golf ball collides with the flagstick.

A virtual golf system according to an embodiment of the present invention includes the virtual golf device described above and a server unit connected to the virtual golf device via a communication network.

In the virtual golf system, a user can use the virtual golf device after completing login and can play in a first mode and a second mode, which are different from each other, on the virtual golf device. The server unit is provided with a database that stores personal information of the user, and when the login is performed or after the login is completed, the mode in which the user plays, either the first mode or the second mode, can be preset by referring to the personal information of the user.

The virtual golf device of the present invention, which provides multiple play modes, and the virtual golf system that uses it, are configured to allow users to play in a variety of ways according to their preferences, which has the effect of satisfying the various needs of users who play screen golf.

1 is a schematic diagram illustrating the configuration of a virtual golf device according to an embodiment of the present invention. FIG. 2 is a diagram for explaining a first and a second mode. FIG. 2 is a diagram for explaining a first and a second mode. FIG. 11 is a diagram illustrating the difference between the first and second modes. FIG. 11 is a diagram illustrating the difference between the first and second modes. FIG. 2 illustrates another embodiment of the virtual golf device of FIG. 1. FIG. 2 illustrates another embodiment of the virtual golf device of FIG. 1. FIG. 13 is a diagram showing an example of automatically recommending either the first or second mode. FIG. 13 is a diagram showing an example of automatically recommending either the first or second mode. FIG. 13 is a diagram showing an example of automatically recommending either the first or second mode. 1 is a schematic configuration diagram of a virtual golf system according to an embodiment of the present invention; FIG. 12 is a diagram showing an example of a screen displayed on the screen of the virtual golf system of FIG. 11.

The present invention will be described in detail below with reference to examples. The objects, features, and advantages of the present invention will be readily understood from the following examples. The present invention is not limited to the examples described herein, and may be embodied in other forms. The examples presented herein are provided so that the disclosed content will be thorough and complete, and so that the concept of the present invention will be fully conveyed to those skilled in the art to which the present invention pertains. Therefore, the present invention should not be limited by the following examples.

In this specification, terms such as first, second, etc. are used to describe various elements, but the elements should not be limited by such terms. These terms are used merely to distinguish the elements from one another. Also, when a layer (film) is referred to as being on another layer (film) or substrate, it means that it can be formed directly on the other layer (film) or substrate, or that there can be a third layer (film) interposed therebetween.

In the drawings, the size of elements or the relative size between elements may be somewhat exaggerated to provide a clearer understanding of the present invention. In addition, the shapes of the illustrated elements may be somewhat changed due to variations in the manufacturing process. Therefore, unless otherwise specified, the embodiments disclosed in this specification should not be limited to the shapes illustrated, and should be understood to include a certain degree of modification.

Figure 1 is a schematic diagram of a virtual golf device according to an embodiment of the present invention.

Referring to FIG. 1, the virtual golf device includes a striking plate (10), a control unit (20), a sensing unit (31), an input unit (40), a sound unit (50), and a display unit (60).

The striking plate (10) is equipped with a striking mat on which a golf ball to be struck is placed. The user is positioned at the striking plate (10) and strikes the golf ball placed on the striking mat.

The control unit (20) plays a role in controlling the overall operation between the components of the virtual golf device. For example, although not shown in the drawings, an auto tee that automatically provides a golf ball to be hit is installed on the hitting mat, and the control unit (20) can control the auto tee so that the golf ball is provided on the auto tee at the time when the user hits the ball. In addition, when the user hits a golf ball, the control unit (20) plays a role in calculating the trajectory and/or distance that the golf ball will fly if it were to fly on an actual golf course.

The sensing unit (31) senses the physical state of the golf ball hit by the user, such as the speed, direction of movement, and angle of rotation. The sensing unit (31) includes a sensing means for sensing the physical state of the golf ball, and the sensing means may be various sensors, cameras, etc. The cameras and sensors may be used alone or together. Also, only one or more may be used. The information sensed by the sensing unit (31) is transmitted to the control unit (20), and the control unit (20) calculates the trajectory and distance of the golf ball based on the information from the sensing unit (31).

The input unit (40) is for receiving various information from the user, and may be a keyboard, a mouse, a touch screen, or the like. In screen golf, there may be cases where the user needs to input information, such as when the user inputs his/her ID and password for login, or when the user selects a golf course or difficulty level that he/she wants to play, and the input unit (40) is provided for such cases. The information input through the input unit (40) is transmitted to the control unit (20), and the control unit (20) processes the user's request based on the transmitted information. For example, when the user selects a specific golf course, the control unit (20) performs necessary processing so that the user can play on that golf course. That is, the control unit (20) has an image processing means for processing images, and when the user selects a specific golf course, the image processing means generates an image of the golf course and transmits it to the display unit (60), and the display unit (60) displays the transmitted image and provides it to the user. In addition, when the user inputs personal information such as an ID and password for login, the control unit (20) plays a role of checking the input personal information and determining whether or not to approve the login.

The sound unit (50) includes audio equipment such as speakers, and serves to inform the user of the game's progress and play various sound effects as the game progresses.

The display unit (60) includes a beam projector (61) and a screen (62). The beam projector (61) projects a related image onto the screen (61) so that a golf course or a golf ball is displayed on the screen (62), and the screen (62) displays the projected golf-related image and provides it to the user. Hereinafter, some objects displayed on the screen (62) will be referred to as "virtual". This means that they do not exist in the real world but are displayed on the screen (62). For example, "virtual golf course" means a golf course displayed on the screen (62), and "virtual golf ball" means a golf ball displayed on the screen (62).

The process of playing screen golf in the virtual golf device having the above configuration is as follows. When a user hits a golf ball on the hitting plate (10), the control unit (20) calculates the flight trajectory of the hit golf ball based on the sensing information from the sensing unit (31), and the screen (62) displays an image of the virtual golf ball moving according to the calculated result. At this time, the virtual golf ball in the screen (62) flies along the calculated trajectory and lands at a specific point on the virtual golf course in the screen (62), and the user continues hitting from the point where the virtual golf ball in the screen (62) lands. The user repeats this process until the ball is holed into the hole cup. In order to allow the user to play the above screen golf in various ways, the virtual golf device of the present invention provides various play modes. For example, first and second modes are provided, which differ in whether a flagstick is applied to the virtual golf course. The first and second modes will be described below.

Figures 2 and 3 are diagrams for explaining the first and second modes, and Figures 4 and 5 are diagrams for showing the differences between the first and second modes.

Referring to Figures 2 and 3, in the first mode, both the hole cup (1) and the flagstick (2) are displayed on the screen in a virtual golf course (Figure 2), whereas in the second mode, only the hole cup (1) is displayed on the screen in a virtual golf course, excluding the flagstick (2).

In general, golf is a sport in which ranking is determined by the total number of strokes required to get the golf ball into the hole cup, so the hole cup can be considered the target for hitting the golf ball. Therefore, the shot in golf is aimed at the hole cup, and the golfer needs to check the position of the hole cup before hitting. If the distance to the hole cup is quite far, it is difficult to identify the position of the hole cup with the naked eye, so a flagstick is placed in the hole cup. The golfer looks at the flagstick to identify the position of the hole cup, and hits the golf ball with the flagstick as the target.

In screen golf, a hole cup (1) and a flagpole (2) are displayed on a virtual golf course on a screen. In the case of screen golf, a minimap is provided on the screen that displays the entire virtual golf course and key points, and additional information that is difficult to provide on a real golf course can be provided by various means such as a minimap, so that the flagpole (2) is not essential in screen golf as in real golf. In consideration of such characteristics of screen golf, the present invention provides a first mode in which the flagpole (2) is displayed and a second mode in which the flagpole (2) is not displayed, and the user can select either the first or second mode to play in the way he or she wants. As shown in FIG. 3, in consideration of the fact that the flagpole (2) is not displayed in the second mode and it is difficult for the user to identify the position of the hole cup (1), an indicator (3) that guides the position of the hole cup (1) can be displayed separately on the screen.

The first and second modes have a direct impact on how you play screen golf.

Referring to FIG. 4, in the first mode of displaying the flagpole (2), it is assumed that the user hits a real golf ball placed on the hitting plate with the virtual golf ball (VB) located at the starting point (SP). When the user hits the real golf ball, the control unit calculates the trajectory of the real golf ball based on the physical state of the hit real golf ball, and the virtual golf ball (VB) on the screen moves along the calculated trajectory. Assuming that the virtual golf ball (VB) moves along the first path (P1) according to the calculated trajectory, if the flagpole (2) is located on the first path (P1), the virtual golf ball (VB) will collide with the flagpole (2). The result of the collision is determined based on the direction and speed at which the virtual golf ball (VB) collides with the flagpole (2), which can be additionally calculated by the control unit.

For example, if the control unit calculates a first path (P1) as a trajectory for a virtual golf ball (VB) and then determines that a flagpole (2) is present on the first path (P1), the control unit can calculate the direction and speed at which the virtual golf ball (VB) moving along the first path (P1) will move when it reaches the flagpole (2), and can additionally calculate the trajectory of the virtual golf ball (VB) after collision with the flagpole (2) based on the calculation result. As a result of the additional calculation, the virtual golf ball (VB) can bounce off the flagpole (2) after the collision and move along the second path (P2). Alternatively, as a result of the additional calculation, the virtual golf ball (VB) can move along a third path (P3) below the flagpole (2) after the collision and become a hole in the hole cup (1).

Referring to FIG. 5, in the second mode in which the flagpole (2) is not displayed, it is assumed that the user hits the actual golf ball placed on the hitting plate with the virtual golf ball (VB) located at the starting point (SP). When the user hits the actual golf ball, the control unit calculates the trajectory of the actual golf ball based on the physical state of the hit actual golf ball, and the virtual golf ball (VB) on the screen moves along the calculated trajectory. If it is assumed that the virtual golf ball (VB) moves along the fourth path (P4) according to the calculated trajectory and the fourth path (P4) passes over the hole cup (1), in the first mode, since the flagpole (2) is placed on the hole cup (1), the virtual golf ball (VB) collides with the flagpole (2) and changes its path, but in the second mode, since there is no flagpole (2), the virtual golf ball (VB) does not change its path and moves along the fourth path (P4) and stops at a predetermined position.

In this way, the first and second modes do not merely produce a visual difference based on whether or not the flagpole (2) is displayed, but can directly affect the outcome of the screen golf play since the flagpole (2) affects the path of the virtual golf ball (VB). Since it is impossible to predict how the path of the virtual golf ball (VB) will change after colliding with the flagpole (2), the "flagpole (2)" can be considered a kind of accidental variable. A user can play screen golf in various ways as desired by selecting the first mode if he or she wishes such an accidental variable to be applied, or the second mode if he or she wishes such an accidental variable not to be applied, according to his or her preference.

Figures 6 and 7 show another embodiment of the virtual golf device of Figure 1.

Referring to FIG. 6, the virtual golf device includes a hitting plate (10), a control device (21), a sensing device (31), an input device (41), and a display unit (60). The hitting plate (10) corresponds to a hitting zone where a user places a golf ball and hits it. The control device (21) serves as a control unit in the embodiment described with reference to FIG. 1. A computer device having software installed therein for calculating the trajectory of a golf ball can be used as the control device (21). The sensing device (31) serves as a sensing unit in the embodiment described with reference to FIG. 1. A camera device for sensing the physical state of a golf ball can be used as the sensing device (31). The input device (41) serves as an input unit in the embodiment described with reference to FIG. 1. A keyboard, a mouse, or the like having an input function can be used as the input device (41). The display unit (60) includes a beam projector (61) for projecting golf-related images and a screen (62) for displaying the projected images. Although not shown in the drawing, an audio device for informing the user of the progress of the game and playing various sound effects according to the progress of the game can also be used.

Similar to the virtual golf device described with reference to FIG. 1, the virtual golf device of this embodiment provides a first mode in which a flagpole is displayed on the virtual golf course and a second mode in which the flagpole is not displayed. The user can select the desired play mode at any time while playing screen golf, and can use the input device (41) to select between the first and second modes.

7, for the convenience of the user, the virtual golf device may be provided with an input means (42) for selecting the first or second mode. The input means (42) is disposed near the striking plate (10), and a user who is positioned at the striking plate (10) to strike a golf ball can easily select either the first or second mode at any time using the nearby input means (42). For example, the input means (42) includes a "1st button (42a)" for selecting the first mode and a "2nd button (42b)" for selecting the second mode, and the user can easily select the first or second mode by stepping on either the 1st button (42a) or the 2nd button (42b). The input means (42) includes not only a button for selecting the first or second mode, but also another button (42c) for inputting commands that the user frequently uses during playing screen golf. For example, the button (42c) can be used as a button for adjusting the direction or position of the screen in which the image is displayed.

In this way, the user can use the input device (41) or input means (42) to select either the first or second mode at any time while playing screen golf according to his or her preference, but if the user does not make a selection, the virtual golf device can automatically select either the first or second mode or recommend either the first or second mode, whichever is more advantageous to the user, taking into account the user's current situation.

Figures 8 to 10 show an example of automatically recommending either the first or second mode.

With reference to FIG. 8, it is assumed that a virtual golf ball has landed on the green of a virtual golf course and is in the putting stage. As shown in FIG. 8, if the virtual golf ball (VB) before putting is located at a higher position than the hole cup (1) (if the hole cup (1) is located on a downward slope relative to the virtual golf ball (VB)), the second mode can be recommended to guide the user to select the second mode, or the second mode can be automatically selected. The recommendation can be made in a manner in which a virtual caddy is displayed on the screen and gives advice. When the second mode is recommended, the user can play in the second mode as recommended, or play in the first mode according to his or her preference regardless of the recommendation. When the second mode is automatically selected, the user must play in the second mode regardless of the user's will.

With reference to FIG. 9, it is assumed that a virtual golf ball has landed on the green of a virtual golf course and is in the putting stage. As shown in FIG. 9, when the virtual golf ball (VB) before putting is located at a lower height than the hole cup (1) (when the hole cup (1) is located at an upward slope relative to the virtual golf ball (VB)), the first mode can be recommended to guide the user to select the first mode, or the first mode can be automatically selected. The recommendation can be made in a manner in which a virtual caddy is displayed on the screen and gives advice. When the first mode is recommended, the user can play in the first mode as recommended, or play in the second mode according to his/her preference regardless of the recommendation. When the first mode is automatically selected, the user must play in the first mode regardless of the user's will.

Referring to FIG. 10, when the virtual golf ball (VB) is in the first position (L1) (the hole cup (1) is positioned downwardly inclined relative to the virtual golf ball (VB)) during the putting stage, if there is a flagstick (2), the space (S1) between the flagstick (2) and the virtual golf ball (VB) becomes narrower, and the area of the entrance through which the virtual golf ball (VB) enters the hole cup (1) becomes smaller. Therefore, since the flagstick (2) may interfere with the hole-in during putting, it is advantageous for the user to play in the second mode without the flagstick (2), and taking this into consideration, the second mode is recommended.

When the virtual golf ball (VB) is in the second position (L2) (the hole cup (1) is in an upward incline relative to the virtual golf ball (VB)) during the putting stage, the space (S2) between the flagstick (2) and the virtual golf ball (VB) is not relatively small (S2>S1), and the virtual golf ball (VB) loses power as it moves up the incline, and after colliding with the flagstick (2), there is a high possibility that the ball will go in because there is insufficient power to move to another location. Therefore, since the flagstick (2) may act to help in hole-in during putting, it is advantageous for the user to play with the flagstick (2) present, and taking this into consideration, the first mode is recommended.

The above describes an example of recommending either the first or second mode in consideration of the height difference between the hole cup (1) and the virtual golf ball (VB) during the putting stage (or instead of making a recommendation, a method of automatically setting either the first or second mode that is more advantageous to the user is also applicable), but this is just one example, and either the first or second mode can be recommended or automatically set in consideration of various variables in various situations.

In the putting stage, the distance between the hole cup (1) and the virtual golf ball (VB) is relatively close compared to other stages, so the flagpole (2) located at the hole cup (1) is likely to affect the path of the virtual golf ball (VB), but in other stages, the distance between the hole cup (1) and the virtual golf ball (VB) is very far, so the presence or absence of the flagpole (2) is not likely to affect the play of the screen golf. In consideration of this, the selection of either the first or second mode may be permitted only in the putting stage, and either the first or second mode may be automatically set in other stages. For example, in stages other than putting (when the virtual golf ball (VB) is located in an area other than the green area of the virtual golf course), the first or second mode may be unconditionally set. When playing in the first mode unconditionally in stages other than putting, the flagpole (2) is unconditionally displayed on the virtual golf course, so the user can easily grasp the target point of the hit (the position of the hole cup (1)) by using the flagpole (2). On the other hand, when playing in the second mode unconditionally at a stage other than putting and the flag (2) is not displayed, the user can grasp the target point of the hit (the position of the hole cup (1)) by providing other indicators (see reference number 3 in FIG. 3) other than the flagpole (2). Also, at a stage other than putting, the distance between the hole cup (1) and the virtual golf ball (VB) is far, so the virtual golf ball (VB), which moves along a predetermined trajectory in response to the user's hit, is unlikely to collide with the flagpole (2). Therefore, even if the flagpole (2) is not present, there is no significant difference in the impact on the screen golf play compared to when the flagpole (2) is present.

Figure 11 is a schematic diagram of a virtual golf system according to an embodiment of the present invention.

Referring to FIG. 11, the virtual golf system according to the present embodiment includes a plurality of virtual golf devices (100) and a server unit (200). The virtual golf device (100) is connected to the server unit (200) through a wired or wireless communication network. The virtual golf device (100) serves as a service provider that provides a screen golf service to a user when the user logs in. The virtual golf device (100) may be a device having the same or similar structure as the virtual golf device described with reference to FIG. 1 to FIG. 10. The server unit (200) may serve as a kind of central server used by a service provider that operates a plurality of virtual golf devices (100) to manage the plurality of virtual golf devices (100). A user who wishes to use a screen golf service first logs in to receive the service, and the server unit (200) checks the user's identity when the user logs in and determines whether or not to approve the login. The server unit (200) is provided with a database (210) that stores information required to check the user's identity. The database (210) stores information to verify the user's identity, as well as records of the user's past screen golf games.

As in the previous embodiment, a user playing on the virtual golf device (100) can select either the first or second mode to play. If the user prefers only one mode and does not frequently change modes while playing, it is preferable for the user to pre-select the desired mode from the first or second mode before starting to play. Alternatively, even if the user does not pre-select the desired mode, in a system configured to play screen golf through a login process as in this embodiment, the mode desired by the user can be pre-stored in the database (210), and when the user logs in, the user's identity can be confirmed and the mode desired by the user can be automatically set by referring to the information stored in the database (210).

Figure 12 shows an example of a screen displayed on the screen of the virtual golf system of Figure 11.

Screen golf is often played by multiple users together, rather than by one person. For example, assume that user A and user B play together, and user A prefers the first mode and user B prefers the second mode. When user A and user B log in using their own personal information, the first and second modes can be automatically set for user A and user B, respectively, based on the records in the database (210) while the login is in progress or immediately after the login is completed. In this case, as shown in FIG. 12, when user A plays, a window (W1) for user A is displayed on the screen, and when user B plays, a window (W2) for user B is displayed on the screen. The user windows (W1, W2) easily display personal information (ID, name, nickname, etc.) that can identify the user, the user's past records, the user's current playing status, etc. In addition, the user window (W1, W2) also displays the mode in which the user is currently playing, so that the user can check what mode he or she is playing by referring to his or her window. Thus, the user can enjoy screen golf in the way he or she desires, by maintaining the set mode as it is or by changing the set mode using various input means, etc.

Specific examples of the present invention have been discussed above. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention can be embodied in modified forms without departing from the essential characteristics of the present invention. Therefore, the disclosed examples should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is set forth in the claims, not in the foregoing description, and all differences within the scope of the equivalents thereto should be construed as being included in the present invention.

10... striking plate,
20...Control unit,
30...sensing unit,
40...input unit,
50…Sound section,
60...display unit,
100...Virtual golf device,
200...Server unit

Claims (7)

a control unit that calculates a trajectory of the actual golf ball when a user hits the actual golf ball;
a display unit that displays a virtual golf ball moving along the calculated trajectory on a virtual golf course;
Including,
Users can play in two different modes, the first and second modes,
the virtual golf course includes a hole cup and a flagstick disposed in the hole cup, the hole cup and the flagstick are all displayed in the first mode, and only the hole cup is displayed, excluding the flagstick, in the second mode ;
The second mode may be applied to steps other than padding,
Virtual golf equipment. a control unit that calculates a trajectory of the hit actual golf ball when a user hits the actual golf ball;
a display unit that displays a virtual golf ball moving along the calculated trajectory on a virtual golf course;
Including,
The user can play in two different modes, a first mode and a second mode ,
The virtual golf device wherein the virtual golf course includes a hole cup and a flagstick placed in the hole cup, and in the first mode, the hole cup and the flagstick are all displayed, and in the second mode, an indicator guiding the position of the hole cup is displayed in place of the flagstick and the hole cup is also displayed . a control unit that calculates a trajectory of the hit actual golf ball when a user hits the actual golf ball;
a display unit that displays a virtual golf ball moving along the calculated trajectory on a virtual golf course;
Including,
Users can play in two different modes, the first and second modes,
the virtual golf course includes a hole cup and a flagstick disposed in the hole cup, the hole cup and the flagstick are all displayed in the first mode, and only the hole cup is displayed, excluding the flagstick, in the second mode;
The control unit automatically recommends the first or second mode to the user in consideration of a current playing situation of the user . The virtual golf device according to claim 3 , wherein the current situation is a height difference between the hole cup and the virtual golf ball in a padding stage. When the user is playing in the first mode and the flagpole is on the trajectory calculated by the control unit,
The virtual golf device according to claim 1 , wherein the control unit further calculates a trajectory that is changed by the collision of the virtual golf ball moving along the trajectory with the flagstick after the virtual golf ball collides with the flagstick. A virtual golf device according to any one of claims 1 to 4;
a server unit connected to the virtual golf device via a communication network;
including,
Virtual golf system. After completing the login, the user can use the virtual golf device and play in a first mode and a second mode different from each other on the virtual golf device;
The server unit is provided with a database for storing personal information of users,
7. The virtual golf system according to claim 6, wherein the mode in which the user plays, either the first mode or the second mode, can be preset by referring to the user's personal information when the login is performed or after the login is completed.