Projection system

Abstract

To provide a projection system capable of creating various visual expressions.SOLUTION: A projection system includes a screen 100, an image projection unit 200 for projecting an image on the screen 100, and a conveyance table 500 on which the image projection unit 200 is placed and moved. The conveyance table 500 has a projection direction adjusting part for adjusting the projection direction of the image, and a support mechanism 400 for supporting the screen 100 such that the position of the screen 100 can be adjusted in the direction crossing the installation surface on which the conveyance table 500 is installed.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a projection system.

Background Art

[0002] Patent Document 1 discloses a video display device including a projector that projects an image onto a stereoscopic screen, a projector holder capable of adjusting the height of the projector and the distance between the stereoscopic screen and the projector, and a mounting table capable of mounting and moving the stereoscopic screen, the projector, and the projector holder.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the configuration described in Patent Document 1, there is a problem that the position and angle of the screen cannot be greatly changed, so the posture of the screen is fixed and only a predetermined video expression can be achieved. That is, the realization of various video expressions has been demanded.

Means for Solving the Problems

[0005] The projection system includes a screen, an image projection device that projects an image onto the screen, and a carrier on which the image projection device is placed and can move. The carrier has a projection direction variable unit that varies the projection direction of the image, and a support mechanism that supports the screen so that the position of the screen can be adjusted in a direction intersecting the installation surface on which the carrier is installed.

Brief Description of the Drawings

[0006] [Figure 1]A perspective view showing the configuration of the projection system. [Figure 2] A side view showing the configuration of the projection system. [Figure 3] A perspective view showing the configuration of the transport platform. [Figure 4] A side view showing the configuration of the transport platform. [Figure 5] A perspective view showing part of the configuration of the second position adjustment mechanism. [Figure 6] A perspective view showing part of the configuration of the second position adjustment mechanism. [Figure 7] A cross-sectional view showing the configuration of the variable projection direction section. [Figure 8] A side view showing the configuration of a modified projection system. [Modes for carrying out the invention]

[0007] In the following diagrams, the three mutually orthogonal axes are described as the X-axis, Y-axis, and Z-axis. The direction along the X-axis is referred to as the "X-direction," the direction along the Y-axis as the "Y-direction," and the direction along the Z-axis as the "Z-direction." The direction of the arrow is the + direction, and the direction opposite to the + direction is the - direction. The +Z direction is also sometimes referred to as "up" or "upward," and the -Z direction as "down" or "downward." Viewing from the +Z direction is also called a planar view or planar perspective. Furthermore, the surface on the Z-direction + side is described as the top surface, and the surface on the opposite side, the Z-direction - side, is described as the bottom surface.

[0008] First, the configuration of the projection system 1000 will be explained with reference to Figures 1 and 2.

[0009] As shown in Figures 1 and 2, the projection system 1000 includes a screen 100, an image projection device 200 that projects images or videos onto the screen 100, and a transport platform 500 on which the image projection device 200 is placed.

[0010] This projection system 1000 allows, for example, as shown in Figure 2, to be used by entering the area below the screen 100 and viewing the image while sitting underneath, or by viewing the image while lying in bed.

[0011] The screen 100 is made of a flexible and semi-transparent material. For example, the screen 100 is made of a thin cloth fabric that is thin enough to flutter in the wind. The edges of the screen 100 are fixed to a weight 110, which serves as a positioning mechanism, for example, via a string.

[0012] The image projection device 200 is, for example, a short-throw projector that projects an image onto a curved screen 100 positioned diagonally upward.

[0013] The transport platform 500 has, for example, a wooden transport box 300. Rollers 310 are attached to the bottom surface of the transport box 300. Therefore, the image projection device 200 and screen 100 can be freely moved to the location where the user wants to install them.

[0014] Furthermore, the transport platform 500 has a support mechanism 400 that allows the position of the screen 100 to be adjusted in the height direction, which is the Z direction, in a direction intersecting the installation surface on which the transport box 300 is installed. The screen 100 is supported by the support mechanism 400.

[0015] Next, the configuration of the transport platform 500 will be described with reference to Figures 3 and 4.

[0016] As described above, the transport platform 500 includes a transport box 300 and a support mechanism 400. Furthermore, the transport platform 500 has a projection direction variable unit 250 (see Figure 7) that changes the projection direction of the image projected by the image projection device 200. The projection direction variable unit 250 will be explained later.

[0017] The support mechanism 400 includes a first position adjustment mechanism 410 for adjusting the height of the screen 100 in the Z direction, and a second position adjustment mechanism 420 for adjusting the position of the screen 100 in a direction intersecting the Z direction.

[0018] The first position adjustment mechanism 410 includes a first height adjustment pipe 411 and a second height adjustment pipe 412. The first height adjustment pipe 411 is, for example, a square pipe and is fixed to the transport box 300. The second height adjustment pipe 412 is a square pipe thinner than the first height adjustment pipe 411 and is fixed to the first height adjustment pipe 411. That is, although not shown in the figure, the second height adjustment pipe 412 is slidably disposed within the first height adjustment pipe 411 in the first position adjustment mechanism 410.

[0019] As shown in FIG. 4, by inserting the second height adjustment pipe 412 into the first height adjustment pipe 411, the height of the screen 100 can be lowered, that is, set to the first height. By pulling out the second height adjustment pipe 412 from the first height adjustment pipe 411, the height of the screen 100 can be increased, that is, set to the second height. That is, the position of the screen 100 can be changed by a height H.

[0020] As a method for fixing the second height adjustment pipe 412 and the first height adjustment pipe 411, a knob screw (not shown) can be used. Specifically, loosen the knob screw to adjust the length of the second height adjustment pipe 412, and after the adjustment is completed, tighten the knob screw to fix the second height adjustment pipe 412 to the first height adjustment pipe 411.

[0021] Also, a speaker 320 is disposed on the -Y direction side of the transport box 300. In order to improve the sound quality output from the speaker 320, for example, an enclosure is provided in the transport box 300 so as to surround the back surface of the speaker 320. The speaker 320 is connected to a player or an amplifier (not shown).

[0022] The second position adjustment mechanism 420 includes a first support portion 421 extending in the X direction, which is the first direction, a second support portion 422 extending in the +Y direction, which is the second direction, with respect to the extending direction of the first support portion 421, and an arm portion 423 extending in the -Y direction, which is the third direction, with respect to the extending direction of the first support portion 421.

[0023] The first support column 421 is, for example, a round pipe and is rotatably supported by the second height adjustment pipe 412 of the first position adjustment mechanism 410.

[0024] The second support column 422 extends in the +Y direction, opposite to the side where the screen 100 is positioned, and one end 422a is fixed to the central part of the first support column 421. The other end 422b of the second support column 422 is connected to a handle 422d, which serves as an operating part, via a wire 422c.

[0025] By turning the handle 422d and moving the other end 422b of the second support column 422 up and down, the first support column 421, which is fixed to one end 422a of the second support column 422, rotates, specifically, around the pivot axis 401.

[0026] The arm portion 423 has a first arm portion 423a and a second arm portion 423b, extends in the -Y direction which is a third direction opposite to the second direction, and supports the screen 100. Specifically, the first arm portion 423a is fixed to one end 421a of the first support portion 421. The second arm portion 423b is fixed to the other end 421b of the first support portion 421.

[0027] Next, we will explain how to adjust the angle of the screen 100. For example, in the initial stage, the screen 100 is fixed at a first angle (see Figure 4) where the arms 423a and 423b are parallel to the mounting surface, as shown in Figure 1.

[0028] As shown in Figure 4, first, by rotating the handle 422d and pulling the wire 422c, the position of the other end 422b of the second support column 422 is lowered, and the first support column 421 rotates around the pivot axis 401. Consequently, the tips of the arms 423a and 423b, which are fixed to the first support column 421, are raised, and the screen 100 is positioned at the second angle.

[0029] On the other hand, by rotating the handle 422d in the opposite direction and loosening the wire 422c, the position of the other end 422b of the second support column 422 rises, and the first support column 421 rotates around the pivot axis 401. As a result, the tips of the arms 423a and 423b, which are fixed to the first support column 421, lower, and the screen 100 is positioned at a third angle.

[0030] In this way, the first position adjustment mechanism 410 and the second position adjustment mechanism 420 make it possible to change the height and angle of the screen 100, enabling a wide range of visual expressions. Furthermore, even if the screen 100 is at a height that is out of reach, for example, the angle of the screen 100 can be easily changed by operating the handle 422d.

[0031] Furthermore, turning the handle 422d left or right, i.e., in the +Y or -Y direction, changes the angle of the screen 100, creating a fluttering effect. You can also blow air onto the screen 100. This can enrich the expression of images and videos. Additionally, by moving the screen 100 closer to or further away from a person lying in bed, you can enjoy the changes in images and videos. Note that the images and videos projected onto the screen 100 may sometimes be out of focus, but this can also be enjoyed as part of the changes in the image or video.

[0032] Next, with reference to Figures 5 and 6, the configuration of the first support column 421, the second support column 422, and the arm portions 423a and 423b, which constitute the second position adjustment mechanism 420, will be described in detail.

[0033] As shown in Figure 5, the first support column 421 is slidably positioned on the second height adjustment pipe 412. The second support column 422 has a through hole at one end 422a, into which the first support column 421 is inserted. Furthermore, the second support column 422 is fixed in place by adhesive or the like to prevent rotation, so that it can be linked to the rotational movement of the first support column 421.

[0034] Furthermore, a through hole is provided at the other end 422b of the second support column 422. A wire 422c is passed through this through hole and secured. The other end 422b of the second support column 422 is tensioned upward by the weight of the screen 100 attached to the arm sections 423a and 423b, for example.

[0035] As shown in Figure 6, the first arm portion 423a is fixed to one end 421a of the first support portion 421, for example, via a T-joint. The first arm portion 423a is provided with a plurality of clips 423a1 for fixing the screen 100. The configuration of the second arm portion 423b is the same as that of the first arm portion 423a.

[0036] The placement of the first arm 423a and the second arm 423b creates space below the screen 100. Therefore, a user can enter this space (see Figure 2).

[0037] Furthermore, images can also be projected onto the screen 100 between the first arm 423a and the second arm 423b, creating a space for the user that resembles being inside a cave.

[0038] Furthermore, as shown in Figures 5 and 6, the length L1 of the second support column 422, specifically the length from one end 422a to the other end 422b, is shorter than the length L2 of the arms 423a and 423b, specifically the length from one end of the arms 423a and 423b to the other end. In other words, the length between the pivot shaft 401 and the other end 422b of the second support column 422 is shorter than the length between the pivot shaft 401 and the other end of the arms 423a and 423b that is opposite to the end of the arms 423a and 423b that is fixed to the first support column 421.

[0039] According to this, by utilizing the principle of levers, the pivot point is the rotation axis 401 of the first support column 421. Therefore, when the second support column 422, which has a shorter length L1, is moved as the point of application of force, the arms 423a and 423b, which have a longer length L2, can be moved as the point of effort. Thus, even with small movements, the screen 100 can be moved a large distance.

[0040] Next, with reference to Figure 7, the configuration of the projection direction variable unit 250 that constitutes the transport platform 500 will be described.

[0041] As shown in Figure 7, the projection direction variable unit 250 changes the projection direction of the image projected by the image projection device 200. The image projection device 200 is, as described above, a short-throw projector using, for example, a concave mirror or an optical axis bending type projection optical system, and is arranged vertically. A housing is arranged around the image projection device 200 to guide it. This housing is provided with a fixing part 251 for fixing the wire 252. The fixing part 251 may be directly attached to the housing of the image projection device 200.

[0042] The wire 252 is pulled out to the +Y side of the transport box 300 via a pulley 253 and is fixed to a lever (not shown). By moving the lever and pulling the wire 252, the projection direction of the image from the image projection device 200 can be changed. Conversely, by moving the lever and loosening the wire 252, the projection direction of the image from the image projection device 200 can be returned to its original position.

[0043] Furthermore, as shown in Figure 7, the transport box 300 is equipped with a battery 330. By using the battery 330, the image projection device 200 and sound equipment can be operated regardless of the installation location.

[0044] As described above, the projection system 1000 of this embodiment comprises a screen 100, an image projection device 200 for projecting an image onto the screen 100, and a transport platform 500 on which the image projection device 200 is mounted and which is movable. The transport platform 500 includes a projection direction variable unit 250 for varying the projection direction of the image, and a support mechanism 400 that supports the screen 100 so that its position can be adjusted in a direction intersecting the mounting surface on which the transport platform 500 is installed.

[0045] With this configuration, the position of the screen 100 can be changed by raising or lowering it in a direction intersecting the installation surface, for example, vertically, using the support mechanism 400, thereby changing the appearance of the projected image. In other words, it is possible to improve the diversification of video expression. In addition, the orientation of the projected image can be changed by the projection direction variable unit 250, so the appearance of the image can be changed. Furthermore, since the image projection device 200 is mounted on the transport platform 500, the ease of setting up the screen 100 can be improved.

[0046] Furthermore, in the projection system 1000 of this embodiment, it is preferable that the support mechanism 400 includes a first position adjustment mechanism 410 for adjusting the position of the screen 100 in the height direction from the installation surface, and a second position adjustment mechanism 420 for adjusting the position of the screen 100 in a direction intersecting the height direction. With this configuration, the position of the screen 100 is adjusted in the height direction by the first position adjustment mechanism 410 and in the direction intersecting the height direction by the second position adjustment mechanism 420, thereby enabling a wider variety of image expressions.

[0047] Furthermore, in the projection system 1000 of this embodiment, it is preferable that the second position adjustment mechanism 420 includes a first support column 421 that is rotatably supported by the first position adjustment mechanism 410 and extends in a first direction parallel to the installation surface, a second support column 422 that extends in a second direction intersecting the first direction, with one end 422a fixed to the center of the first support column 421 and rotating around a pivot axis 401 along the first direction of the first support column 421, a handle 422d connected to the other end 422b of the second support column 422 for rotating the second support column 422, and arms 423a and 423b provided at one end 421a and the other end 421b of the first support column 421, respectively, extending in a third direction opposite to the second direction, and supporting the screen 100.

[0048] With this configuration, by moving the other end 422b of the second support column 422 in the height direction using the handle 422d, the first support column 421 fixed to the second support column 422 rotates around the pivot axis 401, and as the first support column 421 rotates, the two arms 423a and 423b rotate in the height direction. Therefore, by operating the handle 422d, it becomes possible to change the angle and height of the screen 100, enabling a variety of visual expressions. Furthermore, even if the screen 100 is at a height that is out of reach, for example, the arms 423a and 423b can be easily rotated by operating the handle 422d.

[0049] Furthermore, in the projection system 1000 of this embodiment, it is preferable that the length of the second support column 422 is shorter than the length between one end and the other end of the arm portions 423a and 423b. With this configuration, the first support column 421 is rotatably supported by the first position adjustment mechanism 410. In other words, by utilizing the principle of leverage, by using the first support column 421 as the fulcrum, when the other end 422b of the shorter second support column 422 is moved as the point of application of force, the longer arm portions 423a and 423b can be rotated as the point of force application. Therefore, even with small movements, the screen 100 can be moved a large distance. In other words, the screen 100 can be easily installed.

[0050] Furthermore, in the projection system 1000 of this embodiment, it is preferable that the transport platform 500 is equipped with a battery 330 that supplies power to the image projection device 200. With this configuration, since the battery 330 is provided, power can be stably supplied to the image projection device 200 even if there are no power outlets nearby. Therefore, it becomes possible to improve the flexibility of setting up the transport platform 500, even in places such as events, and to create more sophisticated spatial effects.

[0051] Furthermore, in the projection system 1000 of this embodiment, it is preferable to provide a weight 110 on the opposite side of the screen 100 from the support mechanism 400 for positioning the screen 100 on the installation surface. With this configuration, the position of the end of the screen 100 is determined by the weight 110, in other words, the end of the screen 100 is fixed, so the height and angle of the screen 100 can be easily changed by moving the first position adjustment mechanism 410 and the second position adjustment mechanism 420.

[0052] The following describes some variations of the embodiments described above.

[0053] As described above, the system is not limited to projecting images or videos onto the screen 100 from inside the area covered by the screen 100, but may also be configured as shown in Figure 8. Figure 8 is a side view showing the configuration of a modified projection system 1001.

[0054] As shown in Figure 8, the modified projection system 1001 projects images and videos onto the screen 100 from outside the screen 100, in addition to the embodiments described above. Specifically, a transport platform 1300 on which another image projection device 1200 is placed is positioned outside the screen 100, that is, on the -Y direction side. This configuration further enhances the diversification of video expression. Furthermore, it is not limited to enjoying images and videos from inside the screen 100, but can also be enjoyed from outside the screen 100.

[0055] As described above, the first position adjustment mechanism 410 is not limited to sliding only the second height adjustment pipe 412, but may also slide the first height adjustment pipe 411. Specifically, the first height adjustment pipe 411 can be slid vertically relative to the transport box 300 using a linear guide or the like.

[0056] As described above, the first height adjustment pipe 411 and the second height adjustment pipe 412 are not limited to being fixed with knob screws. For example, through holes may be provided in both the first height adjustment pipe 411 and the second height adjustment pipe 412, and the height may be adjusted by inserting a pin into the through hole.

[0057] As described above, the image projection device 200 is not limited to being placed vertically, but may also be placed on the floor inside the transport box 300.

[0058] As mentioned above, when changing the angle of the screen 100, the operation is not limited to turning the handle 422d; it may also be done by electrically winding or loosening the wire 422c. [Explanation of Symbols]

[0059] 100…Screen, 110…Weight as positioning mechanism, 200…Image projection device, 250…Variable projection direction unit, 251…Fixed unit, 252…Wire, 253…Pulley, 300…Transport box, 310…Roller, 320…Speaker, 330…Battery, 400…Support mechanism, 401…Rotating shaft, 410…First position adjustment mechanism, 411…First height adjustment pipe, 412…Second height adjustment pipe, 420…Second position adjustment mechanism ,421...First support column, 421a...One end, 421b...The other end, 422...Second support column, 422a...One end, 422b...The other end, 422c...Wire, 422d...Handle as operating part, 423...Arm, 423a...First arm, 423a1...Clip, 423b...Second arm, 500...Transport platform, 1000...Projection system, 1001...Projection system, 1200...Image projection device, 1300...Transport platform.

Claims

1. The screen and, An image projection device that projects an image onto the aforementioned screen, A transport platform on which the image projection device is mounted and which is movable, Equipped with, The aforementioned transport platform is A projection direction variable unit that changes the projection direction of the aforementioned image, The system includes a support mechanism that supports the screen so that the position of the screen can be adjusted in a direction intersecting the mounting surface on which the transport table is installed, The aforementioned support mechanism is A first position adjustment mechanism for adjusting the position supporting the screen in the height direction from the mounting surface, It includes a second position adjustment mechanism for adjusting the position supporting the screen in a direction intersecting the height direction, The second position adjustment mechanism is, A first support column is rotatably supported by the first position adjustment mechanism and extends in a first direction parallel to the installation surface, A second support portion extends in a second direction intersecting the first direction, with one end fixed to the central part of the first support portion, and rotates around a pivot axis along the first direction of the first support portion, An operating unit connected to the other end of the second support column, which rotates the second support column, A projection system comprising: an arm provided at one end of the first support column and the other end of the first support column, extending in a third direction opposite to the second direction, and supporting the screen.

2. A projection system according to claim 1, A projection system in which the length between the pivot axis and the other end of the second support column is shorter than the length between the pivot axis and the other end of the arm opposite to the end of the arm that is fixed to the first support column.

3. A projection system according to claim 1 or claim 2, The transport platform is a projection system having a battery that supplies power to the image projection device.

4. A projection system according to any one of claims 1 to 3, A projection system having a positioning mechanism on the screen opposite to the support mechanism for positioning the screen on the installation surface.

Images