Display system

Abstract

Stabilize the screen's position. [Solution] The display system (1) includes a propeller section (11) that generates lift, a main body section (12) that can fly in the air by the propeller section (11), a screen (40), a suspension section (30) that suspends the screen (40) from the main body section (12), and a projection section (20) connected to the main body section (12) that projects an image onto the screen (40). The screen (40) is a sheet-type screen, positioned vertically below the propeller section (11) with its surface inclined with respect to the vertical direction, or the suspension section (30) is sheet-like, positioned vertically below the propeller section (11) with its surface inclined with respect to the vertical direction.

Description

Technical Field

[0001] The present disclosure relates to a display system that performs display on an aerial screen.

Background Art

[0002] In recent years, aerial displays using drones have been carried out. For example, by attaching LEDs (light emitting diodes) to a plurality of drones and arranging the plurality of drones in the air to perform display, or by suspending a cloth display equipped with LEDs from a drone to perform display.

[0003] Also, Non-Patent Documents 1 and 2 describe a configuration in which a visible light semiconductor laser is mounted on a drone and light from the visible light semiconductor laser is irradiated onto a screen suspended from another drone to perform display.

Prior Art Documents

Non-Patent Documents

[0004]

Non-Patent Document 1

Non-Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, for example, if a screen for aerial display is suspended from a drone, the screen may be affected by airflow generated by the drone's rotor blades and natural wind, potentially resulting in unstable position and orientation.

[0006] No prior patent documents describe a method for stabilizing the position of a screen suspended from a drone.

[0007] One aspect of this disclosure has been made in view of the above-mentioned problems, and its purpose is to realize a display system in which the position of a screen suspended from a drone is stabilized. [Means for solving the problem]

[0008] To solve the aforementioned problems, a display system according to one aspect of the present disclosure comprises a main body that is capable of flying in the air by a lifting unit that generates lift, a screen, a suspension unit that suspends the screen from the main body, and a projection unit connected to the main body that projects an image onto the screen, wherein the screen is a sheet-type screen and is positioned vertically below the lifting unit with its surface inclined with respect to the vertical, or the suspension unit is sheet-shaped and is positioned vertically below the lifting unit with its surface inclined with respect to the vertical. [Effects of the Invention]

[0009] According to one aspect of this disclosure, the screen is biased diagonally by the downward airflow generated by the lifting element, thereby maintaining its orientation. This allows the screen to be stabilized in position. [Brief explanation of the drawing]

[0010] [Figure 1] This is a perspective view illustrating the overview of the display system related to this disclosure. [Figure 2] This is a diagram showing the entire display system. [Figure 3]It is a diagram that briefly shows the operation of the display system when the wind blows. [Figure 4] It is a diagram showing an example of a stabilizer plate. [Figure 5] It is a diagram that briefly shows the operation of the display system when the wind blows. [Figure 6] It is a diagram showing a configuration in which the length of the suspension part is variable. [Figure 7] It is a diagram showing a configuration in which the inclination of the screen is variable. [Figure 8] It is a diagram showing a display system according to another embodiment. [Figure 9] It is a diagram showing a display system according to another embodiment. [Figure 10] It is a diagram showing a display system according to another embodiment. [Figure 11] It is a diagram showing a display system according to another embodiment. [Figure 12] It is a diagram showing a display system according to another embodiment. [Figure 13] It is a diagram showing a display system according to another embodiment. [Figure 14] It is a diagram showing a display system according to another embodiment. [Figure 15] In a display system according to another embodiment, it is a diagram for explaining a state in which the screen is swayed by wind or the like. [Figure 16] It is a diagram showing a display system according to another embodiment. [Figure 17] It is a diagram showing a display system according to another embodiment.

Mode for Carrying Out the Invention

[0011] 〔Embodiment 1〕 Hereinafter, an embodiment of the present disclosure will be described in detail. FIG. 1 is a perspective view for explaining the outline of the display system 1 according to the present disclosure. As shown in FIG. 1, the display system 1 includes a projection unit 20 provided on a drone 10, and displays an image on a screen 40 suspended from the drone 10 via a suspension unit 30. Since the projection unit 20 is provided on the drone 10, the display system 1 according to this embodiment can be called a light source integrated type. By suspending the screen 40 from the flying drone 10 in the air, a display can be performed in the air. In FIG. 1, an example where there are two suspension units 30 is shown, but it is not limited thereto. For example, the number of suspension units 30 may be four. By using four suspension units 30, the seesaw-type vibration in the front-rear direction with the connection point between the upper end of the screen and the suspension unit as a fulcrum is reduced, and the stability is further improved. Also, even when there are two suspension units 30, instead of connecting to the central portion of the upper end side of the screen 40 shown in FIG. 1, the two suspension units 30 are respectively connected to the central portion of the upper end side where the screen 40 does not exist (symmetrically in two places), thereby suppressing the seesaw-type vibration in the front-rear direction. Hereinafter, in this embodiment, the vertical direction is the Z direction, the plane perpendicular to the Z direction and facing the screen 40 is the X direction, and the direction parallel to the screen 40 is the Y direction.

[0012] The drone 10 includes a plurality of propeller units 11 and a main body unit 12. The propeller unit 11 generates lift by causing an air flow downward and can be called a lift unit. Note that the propeller unit 11 not only moves the drone 10 up and down according to the rotation speed, but also changes the blowing direction by tilting the aircraft by changing the propeller rotation speed in the front, rear, left, and right directions, enabling movement in an arbitrary traveling direction even in the horizontal direction.

[0013] The projection unit 20 includes, for example, a visible light semiconductor laser, and irradiates the screen 40 while scanning the semiconductor laser light, thereby displaying an image on the screen 40. By using semiconductor laser light, an image with high brightness, high color saturation, and high visibility even under sunlight can be displayed.

[0014] The suspension section 30 suspends the screen 40 from the drone 10. The suspension section 30 is made of a lightweight, flexible material such as a rope that can withstand the load of the screen 40.

[0015] The screen 40 is transparent and displays an image projected from the projection unit 20 onto its vertically upper surface on its vertically lower surface. Of the surfaces of the screen 40, the surface on which the image is displayed is called the screen surface, and the surface opposite the screen surface is called the back surface. The screen 40 is sheet-like and has a rectangular surface. Here, it is assumed to be a rectangle with the longer side in the Y direction and the shorter side in the Z direction. In the example shown in Figure 1, the display system 1 includes two screens 40, and the two screens 40 are arranged opposite each other with their surfaces tilted with respect to the vertical direction. The state in which the surface of the screen 40 is tilted with respect to the vertical direction means, in other words, that the direction of the shorter side of the screen 40 is at an angle to the vertical direction. Hereafter, the state in which the direction of the shorter side of the screen 40 is at an angle to the vertical direction will also be called the state in which the screen 40 is tilted, and the angle between the direction of the shorter side of the screen 40 and the vertical direction will also be called the tilt angle of the screen 40.

[0016] Furthermore, of the two screens 40, the one positioned in the -X direction is designated as screen 40a, and the one positioned in the +X direction is designated as screen 40b.

[0017] Each side of the screen 40 is fixed by the frame 41, and each vertex of one screen 40 is connected to and fixed to each vertex of the other screen 40 by the frame 41. Therefore, the relative positions of the screens 40 are fixed. The frame 41 is made up of rod-shaped members of fixed length.

[0018] The screen 40 is positioned vertically below the propeller section 11 and is biased away from the drone 10 in the horizontal plane by the airflow generated by the propeller section 11. In the example shown in Figure 1, the airflow generated by the propeller section 11 of the drone 10 biases screen 40a in the -X direction and screen 40b in the +X direction. As a result, two opposing forces act on the screen 40 from the propeller section 11, stabilizing its position.

[0019] In other words, the screen 40 is positioned on its back side, opposite to the screen surface that displays the image, so as to be biased away from the main body 12 in the horizontal plane by the downward airflow generated by the propeller section 11.

[0020] In this embodiment, a configuration comprising a pair of screens 40 has been described as an example, but the invention of this disclosure is not limited thereto. There may be three or more screens 40, in which case the three or more screens 40 are arranged rotationally symmetrically with respect to the central axis C, which will be described later.

[0021] Furthermore, the screen 40 may be an open screen in which a portion of its surface is open. By using an open screen, it is possible to realize a screen that is lightweight and reduces the impact of wind on the surface of the screen 40.

[0022] As described above, the display system 1 comprises a drone 10, a projection unit 20, and a screen 40. The drone 10 comprises a propeller unit 11 that generates lift and a main body unit 12 that can fly in the air using the propeller unit 11. The screen 40 is a sheet-type screen suspended from the main body unit 12 via a suspension unit 30, and is positioned vertically below the propeller unit 11 with its surface inclined with respect to the vertical direction. The projection unit 20 is connected to the main body unit 12 and projects an image onto the screen 40.

[0023] Figure 2 shows the overall structure of display system 1. In Figure 2, 201 is a top view of display system 1, 202 is a left side view, 203 is a front view, and 204 is a right side view.

[0024] As shown in Figure 2, 201, the screen 40 is positioned vertically below the propeller section 11. Also, as shown in 202 and 204, the screen 40 has a rectangular surface. Furthermore, as shown in 203, the screen 40 is positioned so that its surface is oblique to the vertical direction.

[0025] As shown in Figure 2, 201, the central axis C is defined as the vertical axis passing through the center of the main body 12 in the horizontal plane. In this case, the multiple screens 40 are positioned vertically below one of the propeller sections 11, and are arranged in a position that is rotationally symmetric with respect to the central axis C, so that their relative positions remain unchanged.

[0026] [Actions taken when the wind blows] Next, with reference to Figure 3, the operation of the display system 1 when wind is blowing will be explained. Figure 3 is a simplified diagram showing the operation of the display system 1 when wind is blowing. 301 in Figure 3 shows the state when the wind is blowing from the -X direction to the +X direction. Note that in Figure 3, the frame 41 is omitted to facilitate understanding of the operation of the display system 1. As shown in 301 in Figure 3, when the wind blows from the -X direction to the +X direction, the screen 40 also moves from the -X direction to the +X direction. As a result, the tilt angle of screen 40a increases, and the tilt angle of screen 40b decreases. In this state, when screens 40a and 40b receive airflow generated by the propeller section 11, screen 40a receives a greater force than normal and is biased in the -X direction. On the other hand, screen 40b receives a smaller force than normal and is not biased in the X direction. As a result, the screen 40 as a whole is biased in the -X direction, and the screen 40 tries to return to its normal position. In other words, the screen 40 is subjected to a force from the wind in the +X direction and a biasing force in the -X direction. These forces cancel each other out, causing the screen 40 to remain in its normal position. This stabilizes the position of the screen 40.

[0027] The same applies when the wind blows in the opposite direction. Figure 3, section 302 shows the state when the wind blows from the +X direction to the -X direction. As shown in Figure 3, section 302, when the wind blows from the +X direction to the -X direction, the screen 40 also moves from the +X direction to the -X direction. As a result, the tilt angle of screen 40a decreases, and the tilt angle of screen 40b increases. In this state, when screens 40a and 40b receive the airflow generated by the propeller section 11, screen 40a receives less force than under normal conditions and is not biased in the X direction. On the other hand, screen 40b receives a greater force than under normal conditions and is biased in the +X direction. As a result, the screen 40 as a whole is biased in the +X direction, and the screen 40 tries to return to its normal position. In this way, even when the wind blows from the +X direction to the -X direction, the screen 40 tries to remain in its normal position. This stabilizes the position of the screen 40.

[0028] [With stabilizing plate] Next, with reference to Figure 4, the case in which a stabilizing plate 50 is attached to the display system 1 will be described. Figure 4 is a diagram showing an example of a stabilizing plate 50. The stabilizing plate 50 is a plate-shaped member with a rectangular surface. Figure 4 shows a state in which multiple stabilizing plates 50 are attached to the vertically lower side of the screen 40. 401 in Figure 4 shows the stabilizing plate 50 as viewed from the -X direction, 402 shows the stabilizing plate 50 as viewed from the -Y direction, and 403 shows the stabilizing plate 50 as viewed from the +Z direction.

[0029] As shown in 402 of Figure 4, the stabilizing plate 50 is attached so as to connect the lower end of screen 40a and the lower end of screen 40b. Also, as shown in 401, the stabilizing plate 50 is tilted so that its surface opens upward from the vertical direction and is positioned symmetrically with respect to the longitudinal center of screen 40. Hereafter, the stabilizing plate 50 located on the +Y side of the center of screen 40 will be called stabilizing plate 50a, and the one located on the -Y side will be called stabilizing plate 50b. Also, similar to screen 40, the state in which the surface of the stabilizing plate 50 is tilted with respect to the vertical means that the direction of the short side of the stabilizing plate 50 is at an angle to the vertical direction. Hereafter, the state in which the direction of the short side of the stabilizing plate 50 is at an angle to the vertical direction will also be called the state in which the stabilizing plate 50 is tilted, and the angle between the direction of the short side of the stabilizing plate 50 and the vertical direction will also be called the angle of inclination of the stabilizing plate 50.

[0030] As described above, the stabilizing plate 50 is plate-shaped and positioned between the vertically lower ends of the symmetrically arranged screens 40. Furthermore, the stabilizing plate 50 is inclined with respect to the vertical direction so as to receive the downward airflow generated by the propeller section 11 on its plate surface and be biased toward moving away from the main body section 12 on the horizontal plane.

[0031] [Actions taken when the wind blows] Next, referring to Figure 5, the operation of the display system 1 when wind blows with the stabilizing plate 50 installed will be described. Figure 5 is a simplified diagram showing the operation of the display system 1 when wind blows. 501 in Figure 5 shows the state when the wind blows from the +Y direction to the -Y direction. As shown in 501 in Figure 5, when the wind blows from the +Y direction to the -Y direction, the screen 40 also moves from the +Y direction to the -Y direction. As a result, Of the stabilizers 50, the angle of inclination of stabilizer 50a, which is located on the +Y side, becomes larger, while the angle of inclination of stabilizer 50b, which is located on the -Y side, becomes smaller. In this state, when the stabilizers 50 receive airflow generated by the propeller section 11, stabilizer 50a receives a greater force than usual and is biased in the +Y direction. On the other hand, stabilizer 50b receives a smaller force than usual and is not biased in the -Y direction. As a result, the stabilizers 50 as a whole are biased in the +Y direction, and the stabilizers 50 try to return to their normal position. Since the stabilizers 50 are attached to the screen 40, the screen 40 also tries to return to its normal position. This stabilizes the position of the screen 40.

[0032] The same applies when the wind blows in the opposite direction. Figure 5, part 502, shows the state when the wind blows from the -Y direction to the +Y direction. As shown in Figure 5, part 502, when the wind blows from the -Y direction to the +Y direction, the stabilizer plate 50 also moves from the -Y direction to the +Y direction. As a result, the tilt angle of stabilizer plate 50a, which is located on the +Y side of the stabilizer plate 50, becomes smaller, while the tilt angle of stabilizer plate 50b becomes larger. In this state, when the stabilizer plate 50 receives the airflow generated by the propeller section 11, stabilizer plate 50a receives less force than under normal conditions and is not biased in the Y direction. On the other hand, stabilizer plate 50b receives a greater force than under normal conditions and is biased in the -Y direction. As a result, the stabilizer plate 50 as a whole is biased in the -Y direction. Since the stabilizer plate 50 is attached to the screen 40, the screen 40 also tries to return to its normal position. Thus, even when the wind blows from the -Y direction to the +Y direction, the screen 40 will try to remain in its normal position. This allows the position of the screen 40 to be stabilized.

[0033] As described above, by attaching the stabilizer plate 50, the position of the screen 40 can be stabilized against wind in the ±Y direction. Even without the stabilizer plate 50, the position of the screen 40 can be stabilized against wind in the ±X direction. Therefore, by attaching the stabilizer plate 50, the position of the screen 40 can be stabilized against wind in any direction of the horizontal plane (360 degrees).

[0034] [Variation] Hereinafter, a modified version of the display system 1 will be described with reference to Figures 6 and 7. Figure 6 shows a configuration in which the length of the suspension part 30 is variable. Figure 7 shows a configuration in which the tilt of the screen 40 is variable.

[0035] [Configuration with variable length for the suspension section 30] Figure 6 shows an example where 601 has a vertical length of LS for the suspension section 30, and 602 has a vertical length of LW (>LS) for the suspension section 30. By making the length of the suspension section 30 variable and changing its length according to the wind strength, the effect of wind on the screen 40 can be reduced. For example, in strong winds, the length of the suspension section 30 can be shortened, and in light winds or less, the length of the suspension section 30 can be lengthened to reduce the effect of wind on the screen 40.

[0036] The length of the suspension section 30 may be manually adjustable or automatically adjustable. If it is automatically adjustable, the main body 12 may be equipped with an anemometer (not shown) and the length of the suspension section 30 connected to the main body 12 may be controlled according to the measurement results.

[0037] [Configuration that allows for variable tilt of screen 40] Figure 7 shows the case where the tilt angle (θa) of the screen 40 is greater than normal, and 703 shows the case where the tilt angle (θb) of the screen 40 is smaller than normal. 702 shows the tilt angle (θn) of the screen 40 under normal conditions.

[0038] By making the tilt of the screen 40 variable and varying its tilt depending on the wind strength, the influence of wind on the screen 40 can be reduced. For example, in strong winds, the tilt angle θa of the screen 40 can be increased as shown in 701, and in light winds or less, the tilt angle θb of the screen 40 can be decreased, thereby reducing the influence of wind on the screen 40.

[0039] The tilt of the screen 40 may be manually adjustable or automatically adjustable. If it is automatically adjustable, for example, the angle of the connection part P between the frame 41_1 on the short side of the screen 40 and the frame 41_2 connecting screen 40a and screen 40b may be automatically adjusted, and the frame 41 may be equipped with an anemometer (not shown), and the angle of the connection part P may be controlled according to the measurement result of the anemometer.

[0040] [Embodiment 2] Other embodiments of this disclosure are described below. For the sake of clarity, components having the same function as those described in the above embodiments are denoted by the same reference numerals, and their descriptions are not repeated.

[0041] Figure 8 shows the display system 1a according to this embodiment. The display system 1a has a screen 40c instead of the screen 40 described above. As shown at 801 in Figure 8, the screen 40c differs from the screen 40 in that it has the shape of the side surface of a frustum of a cone with a larger diameter on the upper vertical side (hereinafter also referred to as the frustum of a cone side surface). Although Figure 8 shows an example with two suspension parts 30, it is not limited to this. For example, there may be four suspension parts 30. By using four suspension parts 30, the seesaw-type forward and backward vibration that occurs with the suspension part and screen connection point as the pivot point, which occurs when there are two parts, is suppressed and stability is further improved. In addition, since screen stability can be obtained by propeller wind regardless of direction in this structure, it is also possible to have only one suspension part on the vertical line from the drone.

[0042] By giving the screen 40c a truncated cone shape, when the screen 40c receives airflow generated by the propeller section 11, it will experience a force that spreads radially in the horizontal plane, thus stabilizing its position.

[0043] Figures 802 and 803 show a configuration in which a stabilizing plate 50c is provided on the vertically lower side of the screen 40c. The stabilizing plate 50c is a plate with a rectangular surface. In the example shown here, multiple stabilizing plates 50c are arranged, and the multiple stabilizing plates 50c are arranged in a grid pattern when viewed from the +Z direction with their surfaces in the vertical direction.

[0044] [Embodiment 3] Other embodiments of this disclosure are described below. For the sake of clarity, components having the same function as those described in the above embodiments are denoted by the same reference numerals, and their descriptions are not repeated.

[0045] Figure 9 shows a display system 1b according to this embodiment. In the display system 1b, the screen 40 described above is replaced with a screen 40x. Furthermore, the projection unit 20 is not directly positioned on the main body 12, but is suspended vertically below the main body 12 and below the screen 40x. The projection unit 20 displays an image on the screen 40x by irradiating a laser vertically upward.

[0046] Screen 40x is a reflective screen. By being reflective, sunlight does not pass through Screen 40x, so viewers do not experience the glare of sunlight.

[0047] Figure 9, part 901, shows the case where the screen 40x is tilted such that the airflow generated by the propeller part 11 causes the screen 40x to move away from the main body part 12. Figure 9, part 902, shows the case where the screen 40x is tilted such that the airflow generated by the propeller part 11 causes the screen 40x to move towards the main body part 12.

[0048] In other words, the screen 40x shown at 902 in Figure 9 is positioned on the back side opposite to the screen surface that displays the image, and is biased in the horizontal plane toward the main body 12 by receiving the downward airflow generated by the propeller section 11.

[0049] [Embodiment 4] Other embodiments of this disclosure are described below. For the sake of clarity, components having the same function as those described in the above embodiments are denoted by the same reference numerals, and their descriptions are not repeated.

[0050] Figure 10 shows the display system 1c according to this embodiment. In the display system 1c, the screen 40 is suspended by a light-shielding plate 60 instead of a suspension part 30. In other words, the light-shielding plate 60 performs the function of the suspension part. Therefore, the light-shielding plate 60 can also be called the suspension part.

[0051] Furthermore, the screen 40 is a rectangular sheet, positioned horizontally, and surrounded on all four sides by a frame 41.

[0052] The light-shielding plate 60 is a flat plate with a trapezoidal surface that connects the frame 41 on each of the four sides surrounding the screen 40 to the main body 12.

[0053] The surface of the light-shielding plate 60 is positioned vertically below the propeller section 11 and is inclined at an angle from the vertical. Each of the four light-shielding plates 60 is biased in the direction of the central axis C (see Figure 2) by the airflow generated by the propeller section 11. This stabilizes the position of the screen 40.

[0054] Furthermore, a polarizing film 70 may be provided between the projection unit 20 and the screen 40. The polarizing film 70 transmits approximately 100% of the laser emitted from the projection unit 20, while blocking 50% or more of sunlight. By providing the polarizing film 70, the viewer of the screen will not experience the glare of sunlight.

[0055] [Embodiment 5] Figure 11 shows the display system 1d according to this embodiment. In the display system 1d, only the suspension part 30 in the display system 1 described above is replaced with a light-shielding plate 60.

[0056] The light-shielding plate 60 is a flat plate that connects the vertically upper frame 41 of the screen 40 to the main body 12, and its surface is trapezoidal.

[0057] The surface of the light-shielding plate 60 is inclined at an angle from the vertical. Therefore, the airflow generated by the propeller section 11 biases the four light-shielding plates 60 toward each other. This stabilizes the position of the screen 40.

[0058] Alternatively, instead of a light-shielding plate 60, a simple flat plate without light-shielding properties may be used as the stabilizing plate 50. Furthermore, a polarizing film may be placed between the projection unit 20 and the screen 40.

[0059] [Embodiment 6] Figure 12 shows a display system 1e according to this embodiment. In the display system 1e, a pair of screens 40y are attached instead of the suspension section 30, and a mirror 90 is positioned vertically below the projection section 20.

[0060] The mirror 90 is a reflecting mirror that reflects the semiconductor laser light projected from the projection unit 20. The semiconductor laser light projected from the projection unit 20 is reflected by the mirror 90 and irradiated onto the reflective scattering surface, which is one side of the screen 40y.

[0061] The screen 40y is a flat panel with a trapezoidal surface, where one side is a light-blocking surface and the other side is a reflective / scattering surface. This allows for blocking sunlight with the light-blocking surface while displaying an image with the reflective / scattering surface.

[0062] The surface of the screen 40y is inclined at an angle from the vertical, and each screen 40y is biased in the direction of the central axis C (see Figure 2) by the airflow generated by the propeller section 11. This stabilizes the position of the screen 40y.

[0063] [Embodiment 7] Figure 13 shows a display system 1f according to this embodiment. 1301 in Figure 13 is a perspective view showing the overall layout of the display system 1f, and 1302 is a view of the display system 1f from the Y direction. As shown in Figure 13, the display system 1f is a light-integrated display system described above, in which a mooring section 110 is placed on the ground, and the lower part of the screen 40 is connected to the mooring section 110 by a fixing rope 120. In the example shown in Figure 13, each of the lower ends of the screen 40 is independently connected to the mooring section 110 and the fixing rope 120. The lower ends of the screen 40 refer to both ends of the lower frame 41, which is the lower frame of the screen 40. By connecting the lower part of the screen 40 to the mooring section 110 with the fixing rope 120, the screen 40 can be stably positioned in the air.

[0064] The mooring section 110 secures one end of the fixing rope 120. The mooring section 110 may also be equipped with a reel mechanism 111 (not shown) which allows for the extension and retraction of the fixing rope 120. By providing the reel mechanism 111, the length of the fixing rope 120 can be adjusted. This makes it possible to reduce the impact on the flight of the drone 10 by adjusting the length of the fixing rope 120, even if the screen 40 is buffeted by wind or the like.

[0065] The fixing cord 120 can be any lightweight, flexible cord-like material such as rope.

[0066] Although Figure 13 shows an example in which the fixing ropes 120 and mooring parts 110 are independently connected to both lower ends of the two screens 40a and 40b, the invention of this disclosure is not limited to this. One fixing rope 120 and mooring part 110 may be connected to one screen 40, or three or more fixing ropes 120 and mooring parts 110 may be connected.

[0067] Furthermore, the configurations described in Embodiments 9 and 10, which will be described later, may also be applied to the display system 1f. That is, the display system 1f comprises a mooring section 110 placed on the ground and a fixing rope 120 connecting the mooring section 110 to the lower part of the screen 40, and at least a portion of the fixing rope 120 may be an elastic section 121. The fixing rope 120 may also include a non-elastic rope-like section 122 that connects both ends of the elastic section 121 and is longer than the elastic section 121. The display system 1f may also be equipped with a reel mechanism 111 in the mooring section 110 for unwinding and winding the fixing rope 120.

[0068] [Embodiment 8] Figure 14 shows a display system 1g according to this embodiment. The display system 1g is configured to suspend a screen 40 from a drone 10 via a suspension unit 30. In the display system 1g, the drone 10 does not include a projection unit 20, and the image is projected onto the screen 40 from a position different from the drone 10. Therefore, the screen surface of the screen 40 is vertical or nearly vertical.

[0069] Furthermore, in the display system 1g, a mooring section 110 is positioned on the ground, and the lower end of the screen 40 is connected to the mooring section 110 by a fixing rope 120. This allows the orientation of the screen 40 to be stabilized.

[0070] Furthermore, as mentioned above, the mooring section 110 may also be equipped with a reel mechanism 111. This makes it possible to reduce the impact on the flight of the drone 10 by adjusting the length of the fixing rope 120, even if the screen 40 is buffeted by wind or the like.

[0071] Let's explain in detail using Figure 14, item 1402. Figure 14, item 1402 shows the screen 40 being buffeted by the movement of the drone 10, wind, etc.

[0072] If the screen 40 is buffeted by wind or other forces, and the length of the fixing rope 120 is fixed, the distance between the screen 40 and the mooring section 110 will not change, and the upper frame of the screen 40 will be affected. As a result, the drone 10 will be affected via the suspension section 30 that connects the screen 40 to the upper frame. On the other hand, if the length of the fixing rope 120 is made variable by the reel mechanism 111, as shown in 1402 of Figure 14, even if the screen 40 is buffeted by wind or other forces, the impact on the upper frame of the screen 40 can be reduced, thereby reducing the impact on the flight of the drone 10.

[0073] Figure 15 also shows another example of the screen 40 being buffeted by the movement of the drone 10 or wind. As shown in Figure 15, even when the screen 40 is buffeted in a direction parallel or nearly parallel to the screen surface of the screen 40, the screen 40 can be stabilized by making the length of the fixing string 120 variable for each mooring section 110. In the example shown in Figure 15, if the screen 40 is buffeted to the left, the length of the fixing string 120 on the right side is made longer than the fixing string 120 on the left side, and if the screen 40 is buffeted to the right side, the length of the fixing string 120 on the left side is made longer than the fixing string 120 on the right side, thereby stabilizing the screen 40.

[0074] Furthermore, making the fixing string 120 variable is possible not only when a reel mechanism 111 is provided, but also when the fixing string 120 has an elastic part 121, which will be described later. Even when an elastic part 121 is provided, the length of each fixing string 120 connected to the screen 40 can be made variable, and the screen 40 can be stabilized even when the screen 40 is flapped in a direction parallel or substantially parallel to the screen surface.

[0075] [Embodiment 9] Figure 16 shows the display systems 1ha, 1hb, and 1hc according to this embodiment. When there is no need to distinguish between the display systems 1ha, 1hb, and 1hc, they are simply referred to as display system 1h. Display system 1h is the same as the display system 1g described above, in which at least a part of the fixing string 120 is an elastic part (elastic body) 121.

[0076] The display system 1ha shown in 1601 of Figure 16 shows an example where the central part of the fixing rope 120, that is, the part not connected to either the screen 40 or the mooring section 110, is the elastic section 121. The display system 1hb shown in 1602 of Figure 16 shows an example where the screen 40 side of the fixing rope 120, that is, the part connected to the screen 40, is the elastic section 121. The display system 1hc shown in 1603 of Figure 16 shows an example where the mooring section 110 side of the fixing rope 120, that is, the part connected to the mooring section 110, is the elastic section 121.

[0077] Since at least a portion of the fixing rope 120 is an elastic portion 121, even if the mooring section 110 is not equipped with a reel mechanism 111, the same effect as when the reel mechanism 111 is provided can be achieved.

[0078] For example, even if the screen 40 is buffeted by a gust of wind, causing a sudden change in tension in the fixing rope 120, the elastic part 121 can absorb and mitigate the change in tension. This reduces the impact on the drone 10, prevents the drone 10 from running out of control, and improves flight stability.

[0079] Furthermore, when the drone 10 is being raised during the setup of the screen 40, the elastic section 121 stretches as the drone approaches its upper altitude, gradually reducing the downward force acting on the drone 10. This allows the drone operator to perform stable maneuvers without worrying about the sudden tension changes in the fixing rope 120 that occur as the drone 10 rises.

[0080] Furthermore, reel mechanisms 111 are often expensive, and equipping the mooring section 110 with a reel mechanism 111 can be cost-prohibitive. By equipping the fixing rope 120 with an elastic section 121, it is possible to use a mooring section 110 without a reel mechanism 111, such as an inexpensive mooring section 110 like an anchor, thereby reducing costs and realizing a safe and stable display system 1h.

[0081] Furthermore, by providing the elastic portion 121, the same effect as when the reel mechanism 111 is provided in the mooring portion 110 is not provided with the reel mechanism 111, but this does not preclude the provision of the reel mechanism 111. It is also possible to use a fixing rope 120 with an elastic portion 121 and to provide the reel mechanism 111 in the mooring portion 110. However, in cases where the mooring portion 110 side is the elastic portion 121, as in the display system 1hc, it is preferable not to provide the reel mechanism 111 in the mooring portion 110.

[0082] [Embodiment 10] Figure 17 shows a display system 1i according to this embodiment. The display system 1i is the same as the display system 1h described above, but with an inelastic portion (inelastic body) 122 provided parallel to the elastic portion 121 of the fixing string 120. The inelastic portion 122 is provided so as to connect both ends of the elastic portion 121, and its length is longer than that of the elastic portion 121. The elastic portion 121 may be made of the same material as the other parts of the fixing string 120.

[0083] According to the display system 1i, even if both ends of the elastic part 121 are pulled too hard for some reason, it will only stretch up to the length of the non-elastic part 122, thus preventing the elastic part 121 from stretching beyond its limit. In other words, it prevents breakage due to tension exceeding the capacity of the elastic part 121. This enhances the safety of the fixing cord 120.

[0084] 〔summary〕 A display system according to Embodiment 1 of the present disclosure comprises a main body that is capable of flying in the air by a lifting unit that generates lift, a screen, a suspension unit that suspends the screen from the main body, and a projection unit connected to the main body that projects an image onto the screen, wherein the screen is a sheet-type screen and is positioned vertically below the lifting unit with its surface inclined with respect to the vertical, or the suspension unit is sheet-shaped and is positioned vertically below the lifting unit with its surface inclined with respect to the vertical.

[0085] In the display system according to Embodiment 2 of the present disclosure, in Embodiment 1, the screen is a sheet-type screen, and is arranged vertically below the lifting portion with its surface inclined with respect to the vertical direction.

[0086] In the display system according to embodiment 3 of the present disclosure, in embodiment 1, the suspension portion is sheet-like and is arranged vertically below the lifting portion with its surface inclined with respect to the vertical direction.

[0087] In the display system according to aspect 4 of the present disclosure, in aspect 2, the screen is positioned on the back side opposite to the screen surface on which the image is displayed, so as to receive a downward airflow generated by the lifting unit and be biased in a direction away from the main body in the horizontal plane.

[0088] The display system according to Embodiment 5 of the present disclosure, in Embodiment 4, comprises a plurality of lifting units and a plurality of screens, wherein the plurality of screens are arranged vertically below any of the plurality of lifting units, and are arranged in a position that is rotationally symmetric with respect to the central axis when the vertical axis passing through the center of the main body in the horizontal plane is taken as the central axis, so that their relative positions remain unchanged.

[0089] The display system according to embodiment 6 of the present disclosure, in embodiment 5, is provided with a stabilizing plate that is inclined with respect to the vertical direction and is positioned between the vertically lower ends of the plate-shaped, rotationally symmetrically arranged screens, so as to receive the downward airflow generated by the lifting portion on the plate surface and biased in a direction away from the main body on the horizontal plane.

[0090] In the display system according to embodiment 7 of this disclosure, the length of the suspension portion is variable in any of embodiments 2, 4 to 6.

[0091] In any of embodiments 2, 4 to 7, the display system according to embodiment 8 of this disclosure has a variable angle of the surface with respect to the vertical direction.

[0092] In the display system according to aspect 9 of the present disclosure, in aspect 2, the screen has a shape that is the side surface of a frustum of a cone, where the diameter of the vertically upper surface is greater than the diameter of the vertically lower surface.

[0093] In the display system according to embodiment 10 of the present disclosure, in embodiment 2, the screen is positioned on the back side opposite to the screen surface on which the image is displayed, so as to receive a downward airflow generated by the lifting unit and be biased toward the main body in the horizontal plane.

[0094] In the display system according to aspect 11 of the present disclosure, in aspect 10, the projection unit is positioned vertically below the screen.

[0095] In the display system according to aspect 12 of the present disclosure, in aspect 10 or 11, a reflector that reflects projected light from the projection unit is positioned vertically below the screen.

[0096] In the display system according to embodiment 13 of the present disclosure, in embodiment 3, the suspension portion is a light-shielding plate, and the light-shielding plate is inclined with respect to the vertical direction such that it receives a downward airflow generated by the lifting portion on its plate surface and is biased in a direction away from the main body portion on the horizontal plane.

[0097] The display system according to aspect 14 of the present disclosure comprises, in any of aspects 1 to 13, a mooring section located on the ground and a fixing rope connecting the mooring section to the lower part of the screen.

[0098] In the display system according to aspect 15 of this disclosure, in aspect 14, the fixing string is elastic in at least a portion of it.

[0099] The display system according to embodiment 16 of the present disclosure, in embodiment 15, includes a string-like non-elastic body that connects both ends of the elastic body and is longer than the elastic body.

[0100] In any of the embodiments 14 to 16, the display system according to embodiment 17 of the present disclosure is provided with a reel mechanism for unwinding and winding the fixing string.

[0101] A display system according to aspect 18 of the present disclosure comprises a main body that is capable of flying in the air by a lifting unit that generates lift, a screen, a suspension unit that suspends the screen from the main body, a mooring unit located on the ground, and a fixing rope that connects the mooring unit to the lower part of the screen.

[0102] In the display system according to aspect 19 of the present disclosure, the mooring section may be equipped with a reel mechanism for unwinding and winding the fixing string, as described in aspect 18.

[0103] The display system according to aspect 20 of this disclosure may be such that, in aspect 18 or 19, at least a portion of the fixing string is an elastic material.

[0104] In any of embodiments 18 to 20, the display system according to aspect 21 of the present disclosure may include a string-like non-elastic body that connects both ends of the elastic body and is longer than the elastic body.

[0105] This disclosure is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of this disclosure. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment. [Explanation of symbols]

[0106] 1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, 1i Display System 10 Drones 11. Propeller section 12 Main body 20 Projection section 30 Hanging section 40, 40a, 40b, 40x, 40y screens 50, 50a, 50b Stabilizer 60 Light-blocking plate 70 Polarizing film 90 Mirror (Reflector) 110 Mooring section 111 Reel mechanism 120 fixing ropes 121 Elastic part 122 Inelastic part

Claims

1. A main body equipped with a lifting unit that generates lift, and capable of flying through the air by the lifting unit, The screen and, A suspension section for suspending the screen from the main body, It comprises a projection unit connected to the main body and for projecting an image onto the screen, The display system is characterized in that the screen is a sheet-type screen positioned vertically below the lifting portion with its surface inclined with respect to the vertical direction, or the suspension portion is sheet-like and positioned vertically below the lifting portion with its surface inclined with respect to the vertical direction.

2. The display system according to claim 1, wherein the screen is a sheet-type screen, and its surface is arranged vertically below the lifting portion with an inclination to the vertical direction.

3. The display system according to claim 1, wherein the suspension portion is in the form of a sheet and is positioned vertically below the lifting portion with its surface inclined with respect to the vertical direction.

4. The display system according to claim 2, wherein the screen is positioned on the back side opposite to the screen surface on which the image is displayed, so as to receive the downward airflow generated by the lifting unit and be biased in a direction away from the main body in the horizontal plane.

5. Multiple lifting units are provided, The display system according to claim 4, wherein the screens are a plurality of screens, and the plurality of screens are arranged vertically below any of the plurality of lifting units, and are arranged in a position that is rotationally symmetric with respect to the central axis when the vertical axis passing through the center of the main body in the horizontal plane is the central axis, so that their relative positions remain unchanged.

6. The display system according to claim 5, further comprising a stabilizing plate positioned at an inclination with respect to the vertical direction between the vertically lower ends of the plate-shaped, rotationally symmetrically arranged screens, which receives the downward airflow generated by the lifting portion on the plate surface and is biased in a direction away from the main body on the horizontal plane.

7. The display system according to claim 2, wherein the length of the suspension portion is variable.

8. The display system according to claim 2, wherein the angle of the surface with respect to the vertical direction is variable.

9. The display system according to claim 2, wherein the screen has a shape that is the side surface of a frustocone, where the diameter of the upper vertical surface is greater than the diameter of the lower vertical surface.

10. The display system according to claim 2, wherein the screen is positioned on the back side opposite to the screen surface on which the image is displayed, so as to receive the downward airflow generated by the lifting unit and be biased toward the main body in the horizontal plane.

11. The display system according to claim 10, wherein the projection unit is positioned vertically below the screen.

12. The display system according to claim 10, wherein a reflector that reflects projected light from the projection unit is positioned vertically below the screen.

13. The aforementioned suspension part is a light-shielding plate. The display system according to claim 3, wherein the light-shielding plate is inclined with respect to the vertical direction so as to receive a downward airflow generated by the lifting portion on the plate surface and biased toward the main body portion in the horizontal plane.

14. Mooring points located on the ground, The display system according to claim 1, further comprising a fixing string connecting the mooring portion and the lower part of the screen.

15. The display system according to claim 14, wherein at least a portion of the fixing string is made of an elastic material.

16. The display system according to claim 15, wherein the fixing string connects both ends of the elastic body and includes a string-like non-elastic body that is longer than the elastic body.

17. The display system according to claim 14, wherein the mooring section is equipped with a reel mechanism for unwinding and winding the fixing rope.

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