Display device support stand and projection system

Abstract

To provide a display device supporting board which can efficiently discharge heat of a display device with an adjustable attitude.SOLUTION: The present invention includes: a fixation member for fixing a display device having a vent hole for airflow; and a plate member for supporting the fixation member in a first posture and in a second posture. The plate material has an opening in a first position and in a second position, the first position facing the vent hole of the display device when the fixation member is in the first posture with the display device being fixed to the fixation member and the second position facing the vent hole of the display device when the fixation member is in the second attitude.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a display device support stand and a projection system. [Background technology]

[0002] 2. Description of the Related Art Projectors that optically project projection light onto a projection surface are known, and a mounting member has been proposed that allows the orientation of such projectors to be manually adjusted. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-72803 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the mounting member disclosed in Patent Document 1, the projector is surrounded in a box shape by a base member made of a plate material, which poses a problem in that heat from the projector cannot be efficiently discharged. [Means for solving the problem]

[0005] According to one aspect of the present invention, a display device is provided with a fixing member for fixing a display device having a vent hole for ventilation, and a plate member for supporting the fixing member in at least a first position and a second position, the plate member having a first position facing the vent hole of the display device when the fixing member is in the first position with the display device fixed to the fixing member. a first opening is provided in the a second position facing the vent hole of the display device when the fixing member is in the second posture; Second opening A display device support base is provided.

[0006] According to one aspect of the present invention, there is provided a projection system including the above-described display device support stand and the display device, wherein the display device is a projector that projects projection light. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a perspective view of a projection system according to an embodiment, seen obliquely from the front. [Figure 2] FIG. 10 is a perspective view of the projection system as seen from the oblique front at another angle. [Figure 3] FIG. 2 is a front view of the projection system. [Figure 4] FIG. 10 is a side view of the projection system, showing the side panel having the engagement holes as viewed from the side. [Figure 5] 5 is a side view of the fixing member in FIG. 4 when it is in a first position. [Figure 6] 5 is a side view of the fixing member in FIG. 4 when it is in a second position. [Figure 7] 5 is a side view of the fixing member in FIG. 4 when it is fixed between the first position and the second position. FIG. [Figure 8] 5A and 5B are diagrams illustrating the range of projected light when in a first attitude and a second attitude. [Figure 9] FIG. 5 is a side view showing the configuration of a support base according to a modified example, and corresponds to FIG. 4. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings below, the dimensions of the components may be shown on different scales to make them easier to see.

[0009] FIG. 1 is a perspective view of a projection system 1 having a display device support base to which a projector 10 according to a first embodiment is attached, as seen obliquely from the front. FIG. 2 is a perspective view of the projection system 1 as seen obliquely from the front at another angle. FIG. 3 is a front view of the projection system 1 as seen from the front. FIG. 4 is a side view of the projection system, with the side panel having an engagement hole as seen from the side. The projection system 1 of this embodiment includes a projector 10 (display device) that projects projection light, and a support base 20 (display device support base) on which the projector 10 can be installed.

[0010] The projector 10 installed on the support base 20 can be transported, for example, by manually moving the support base 20. In other words, the support base 20 is used when projecting light onto a screen or a wall such as a ceiling or side of a room, for example, using the projector 10 on the support base 20 for display, by simply moving it to a desired position, without having to move the projector 10 from the support base 20 to another location.

[0011] Here, in the projector 10, the direction in which the projection lens 11 is disposed is referred to as the front or front side, and the surface of the housing of the projector 10 that is located on the front side is referred to as the front surface. The projector 10 has a front surface 10A, a rear surface 10B, a pair of side surfaces 10C, 10C, a top surface 10D, and a bottom surface 10E. In the projector 10, the rear surface 10B is the surface opposite the front surface 10A, and the direction in which the rear surface 10B is disposed is referred to as the rear or rear side.

[0012] FIG. 5 is a side view of the fixing member 30 when it is in the first position P1. FIG. 6 is a side view of the fixing member 30 when it is in the second position P2. FIG. 7 is a side view of the fixing member 30 when it is fixed between the first position P1 and the second position P2. A projection lens 11 is disposed on the front surface 10A. As shown in FIGS. 5 and 6, an exhaust port 12 (vent hole) used for exhaust (ventilation) is provided in the rear portion of at least one of the pair of left and right side surfaces 10C. An intake port (not shown) used for intake (ventilation) is provided on the side surface 10C. The size of the exhaust port 12 is the area from approximately the center to the rear portion of the side surface 10C in the front-rear direction X1. The shape, area, and position of the exhaust port 12 of the projector 10 are not limited to those of the present embodiment.

[0013] Furthermore, a plurality of screw holes (not shown) for attaching the projector 10 to the fixing member 30 are formed at appropriate positions on the underside 10E of the projector 10. The positions and number of the screw holes of the projector 10 are not limited to those in this embodiment.

[0014] As shown in Figures 2 and 3, the support base 20 includes a plate-shaped fixing member 30 that fixes the projector 10, a rotating shaft member 40 that rotatably supports the fixing member 30 from a first position P1 to a second position P2, a pair of side plates 50 (plate members) that rotatably support the fixing member 30 via the rotating shaft member 40 at least in the first position P1 and the second position P2, which has a rotation angle different from the first position P1, and a base stand 60 that has wheels 61 and supports the side plates 50 from below in the vertical direction.

[0015] When the support base 20 is in a first posture P1 in which the fixing member 30 described later is horizontal when viewed from above, the direction perpendicular to the rotation axis C1 of the rotating shaft member 40 is defined as the front-rear direction X1, and the direction in which the projection lens 11 of the projector 10 is disposed in the front-rear direction X1 is referred to as the front or front side, and the opposite side is referred to as the rear or rear side. In addition, the direction along the rotation axis C1 is referred to as the left-right direction X2, and the direction going around the rotation axis C1 is referred to as the circumferential direction.

[0016] The fixing member 30 is supported by the pair of side plates 50 so as to be rotatable in the circumferential direction between a first position P1 and a second position P2. The fixing member 30 is shaped like a plate with a certain thickness, and has a first surface 30a and a second surface 30b opposite the first surface 30a. When the fixing member 30 is in the first position P1 where it is horizontal, the first surface 30a faces vertically upward, and the second surface 30b faces vertically downward.

[0017] As shown in FIG. 2, the projector 10 can be attached to the second surface 30b of the fixing member 30 with fixing screws 31. The projector 10 is attached to the fixing member 30 with the bottom surface 10E facing the second surface 30b. That is, as shown in FIG. 3, the projector 10 is attached in a state suspended from the fixing member 30 in a first attitude P1 which is a horizontal position, and is also attached in an inverted state, that is, with the top surface 10D of the projector 10 facing vertically downward. Note that the front surface 10A including the projection lens 11 of the projector 10 is provided in a state in which it protrudes forward beyond the front end 30c of the fixing member 30 when attached to the fixing member 30.

[0018] The fixing member 30 has screw holes (not shown) through which fixing screws 31 can be inserted from the first surface 30a side, which are provided so as to penetrate in the thickness direction of the fixing member 30. The positions of the screw holes of the fixing member 30 are set to positions corresponding to screw holes (not shown) formed in the lower surface 10E of the projector 10 that is attached to the second surface 30b. In other words, in the support base 20, the fixing screws 31 are screwed into the multiple screw holes in the lower surface 10E of the projector 10 from the first surface 30a side of the fixing member 30, thereby fixing the projector 10 to a predetermined position on the fixing member 30.

[0019] 5, the first attitude P1 of the fixing member 30 is an attitude in which the first surface 30a and the second surface 30b of the fixing member 30 are horizontal. When the fixing member 30 is in the first attitude P1, the projector 10 is attached to the second surface 30b of the fixing member 30 so that the axial direction of the projection axis CA faces diagonally downward with respect to the horizontal direction SL. When the fixing member 30 is in the first attitude P1, the projection light T1 (see FIG. 8) of the projector 10 is projected onto the side (front) of the room.

[0020] 4, the second attitude P2 of the fixed member 30 is an attitude in which the fixed member 30 is rotated in the circumferential direction so that the axial direction of the projection axis CA is tilted vertically upward from the horizontal, and the plane directions of the first surface 30a and the second surface 30b of the fixed member 30 are in a position where the rotation angle θ with respect to the horizontal direction SL is 90 degrees. When the fixed member 30 is in the second attitude P2, the projection light T2 (see FIG. 8) of the projector 10 is projected onto the ceiling surface of the room.

[0021] As shown in FIG. 3 , the fixing member 30 is provided with an auxiliary plate 32 spaced apart from the second surface 30b. The auxiliary plate 32 is supported by a pair of left and right connecting plates 33 that extend from both sides of the second surface 30b of the fixing member 30 in the left-right direction X2 in a direction away from the second surface 30b, and is thereby fixed to the fixing member 30. The distance between the second surface 30b of the fixing member 30 and the auxiliary plate 32 is set to be greater than at least the height of the projector 10. An internal space R surrounded by the fixing member 30, the auxiliary plate 32, and the pair of connecting plates 33 serves as a storage area for the projector 10 attached to the second surface 30b of the fixing member 30. Both sides of this internal space R in the front-rear direction X1 are connected to the outside, so that when attaching or detaching the projector 10 to or from the fixing member 30, the projector 10 can be inserted into or removed from the internal space R from the front or rear.

[0022] As shown in Fig. 5, the connecting plate 33 is disposed at a position close to the front end 30c of the fixing member 30. A rotary shaft member 40 is provided on an outer surface 33a (see Fig. 3) of the connecting plate 33 on the outer side in the left-right direction, and is interposed between the connecting plate 33 and the side plate 50 and serves as the rotation axis C1 of the fixing member 30. In other words, the connecting plate 33 connected to the fixing member 30 rotates about the rotation axis C1 as the rotary shaft member 40 rotates. Here, the fixing member 30, auxiliary plate 32, and connecting plate 33 are referred to as a fixing unit 30A as needed.

[0023] 3, the rotating shaft member 40 has a first rotating plate 41 connected to the connecting plate 33 of the fixed unit 30A, a second rotating plate 42 provided coaxially with the first rotating plate 41 and connected to the side plate 50, and a bearing 43 that rotates around a central axis between the first rotating plate 41 and the second rotating plate 42. The rotating shaft members 40 are provided on both the left and right sides of the fixed unit 30A. The rotating shaft members 40 on both the left and right sides are arranged coaxially with a rotation axis C1.

[0024] As shown in FIGS. 2 to 5, the side panels 50 are arranged on both the left and right sides of the fixed unit 30A in the left-right direction X2. The side panels 50 are made of plate-shaped members and are provided in a range that covers, from the left and right, the exhaust port 12 of the projector 10 located at least within the rotation region of the fixed member 30 from the first position P1 to the second position P2. The pair of side panels 50 are arranged parallel to each other, with their respective plate surfaces intersecting the rotation axis C1 at right angles in a top view. The side panels 50 are formed so that a front lower end portion 50a protrudes forward and a rear upper end portion 50b is vertically higher than the front upper end portion 50c in a side view. The lower ends of the side panels 50 are connected to the base stand 60.

[0025] The support base 20 of this embodiment is provided with a front panel member 53 that connects the front lower end portions 50a of the pair of side panels 50 in the left-right direction X2 and faces forward. The front panel member 53 is provided with two speakers 54. The speakers 54 output sound in accordance with the image of the projector 10.

[0026] The base frame 60 is a horizontally extending plate-like member that connects and supports the lower ends of the pair of left and right side panels 50. Four wheels 61 are provided on the lower surface 60a of the base frame 60. The wheels 61 allow the support base 20 to move on the floor.

[0027] As shown in Figures 4 to 6, the pair of side panels 50 have openings 51 (51A, 51B) at a first position 50A facing the exhaust port 12 of the projector 10 when the fixing member 30 is in a first position P1 and the projector 10 is fixed to the fixing member 30, and at a second position 50B facing the exhaust port 12 of the projector 10 when the fixing member 30 is in a second position P2.

[0028] 5, the first opening 51A is formed in a circular shape in a side view, and is disposed on the rear side of the rotation axis C1 (rotation axis member 40). When the fixing member 30 is in the first attitude P1, the exhaust port 12 of the projector 10 is exposed in the left-right direction X2 from the first opening 51A, and the exhaust port 12 and the space on the outer surface side of the side panel 50 communicate with each other through the first opening 51A.

[0029] 6, the second opening 51B is formed in a generally trapezoidal shape with the bottom side longer than the top side in a side view, and is disposed vertically below the rotation axis C1 (rotation axis member 40). When the fixing member 30 is in the second attitude P2, the exhaust port 12 of the projector 10 is exposed in the left-right direction X2 from the second opening 51B, and the exhaust port 12 and the space on the outer surface side of the side panel 50 communicate with each other through the second opening 51B. A second opening area S2 of the second opening 51B provided at the second position 50B of the side panel 50 is larger than the opening area S1 of the first opening 51A provided at the first position 50A.

[0030] 7, when the fixing member 30 is in a position fixed at a rotation angle between the first position P1 and the second position P2, no opening is formed in a position facing the exhaust port 12 of the projector 10, but the first opening 51A and the second opening 51B that are arranged near the exhaust port 12 at this time are used for exhaust. Alternatively, even when the fixing member 30 is in a position fixed at a rotation angle between the first position P1 and the second position P2, the openings 51A and 51B may be set so that at least a portion of the exhaust port 12 of the projector 10 is exposed to either the first opening 51A or the second opening 51B.

[0031] 5, when the fixing member 30 is in the first position P1, the distance L0 from the projection lens 11 of the projector 10 to the rotation axis C1 is shorter than the distance L1 from the projection lens 11 to the first opening 51A. As shown in Fig. 6, when the fixing member 30 is in the second position P2, the distance L0 from the projection lens 11 of the projector 10 to the rotation axis C1 is shorter than the distance L2 from the projection lens 11 to the second opening 51B.

[0032] As shown in FIGS. 1 and 4 to 6 , one of the pair of side plates 50 has a plurality of circular engagement holes 52, 52, ... spaced at regular intervals in the circumferential direction along an arc centered on the rotation axis C1. The engagement holes 52 penetrate the side plate 50 in the thickness direction. The positions of the engagement holes 52 overlap with the trajectory of the locking pin 36a of the locking stopper 36 (shown in FIG. 2 ) provided on the fixing member 30 (described later), which rotates together with the fixing member 30. The engagement holes 52 are located rearward of the first opening 51A and the second opening 51B of the side plate 50, but do not overlap with these openings 51A and 51B. The locking pin 36a of the locking stopper 36 selectively engages with one of the engagement holes 52, thereby changing the position of the fixing member 30 at a predetermined rotation angle and fixing it.

[0033] Specifically, the engagement holes 52 include a first engagement hole 52A that secures the fixing member 30 in a first position P1, a second engagement hole 52B that secures the fixing member 30 in a second position P2, and a plurality of third engagement holes 52C between the first engagement hole 52A and the second engagement hole 52B. The third engagement holes 52C secure the fixing member 30 in a position that has a rotation angle between the first position P1 and the second position P2.

[0034] In this embodiment, the engagement hole 52 is provided in only one of the side plates 50, but the engagement hole 52 may be provided in both of the pair of side plates 50. In this case, the engagement holes 52 on both the left and right sides are arranged coaxially on an axis parallel to the rotation axis C1. When the engagement holes 52 are provided in both the left and right side plates 50 in this way, the locking stoppers 36 are also provided on both the left and right sides of the fixing member 30.

[0035] Furthermore, the circumferential spacing and number of adjacent engaging holes 52 provided in one side panel 50 can be set as desired, and by changing the spacing and number, it is possible to change the rotation angle of the projector 10 attached to the fixing member 30. Furthermore, in this embodiment, the engaging holes 52 are through holes that pass through the side panel 50, but they are not limited to through holes and may be blind holes that do not pass through.

[0036] As shown in FIG. 2, the first surface 30a of the fixing member 30 is provided with a locking stopper 36 having a locking pin 36a that can protrude to both sides in the direction of the rotation axis C1, and a rotation operating member 37 for rotating the fixing member 30.

[0037] The locking stopper 36 is disposed behind the first surface 30a of the fixing member 30, at a position closer to one of the side panels 50 where the engagement hole 52 is provided. The locking stopper 36 has a locking pin 36a that is movable in the left-right direction X2.

[0038] The locking pin 36a is provided so as to be able to protrude outward from a side end 30e (see FIG. 3) of the fixing member 30 when viewed from a direction perpendicular to the first surface 30a of the fixing member 30. The locking pin 36a can be manually moved forward and backward using a pin operating member 36b that protrudes outward from a portion of the locking pin 36a. The locking pin 36a can be selectively engaged with one of a plurality of engagement holes 52 provided in the side panel 50. The fixing member 30 is fixed in a position at a rotation angle when the locking pin 36a is engaged. When the locking pin 36a is removed from the engagement hole 52, the fixing member 30 can be rotated circumferentially around the rotation axis C1.

[0039] 2, the rotation operation member 37 is provided at a position closer to the rear end 30d of the first surface 30a of the fixed member 30. The rotation operation member 37 is a rod-like member with a U-shape, and protrudes from the first surface 30a at a height that does not interfere with the first gripping member 38, which will be described later, when the fixed member 30 is rotated.

[0040] As shown in Fig. 1, a first gripping member 38 and a detachable second gripping member 39 located vertically above the first gripping member 38 are provided at the rear portion of the support base 20. The first gripping member 38 and the second gripping member 39 are hand-held rod-shaped members that extend in the left-right direction X2. Figs. 1, 4, and 8 show the second gripping member 39 attached. Figs. 2, 3, 5, 6, and 7 show the second gripping member 39 removed.

[0041] 2 and 4, the first gripping member 38 is fixed to the rear upper end portions 50b of the pair of side plates 50 in a state where they are connected to each other in the left-right direction X2. The first gripping member 38 is disposed on the opposite side of the first surface 30a of the fixed member 30 in the second attitude P2, across the fixing screw 31 provided on the first surface 30a. As described above, the first gripping member 38 is disposed at a position that avoids the rotation operating member 37 when the fixed member 30 is rotated in the circumferential direction.

[0042] 1 and 4, arm members 55 extending vertically upward from the rear upper end portions 50b of each of the pair of side panels 50 are detachably provided. Second gripping members 39 are fixed to the pair of arm members 55 with the upper ends of the arm members 55 connected to each other in the left-right direction X2. In other words, the second gripping member 39 is positioned vertically above the first gripping member 38. As shown in FIG. 8, when an operator M moves the support base 20, he or she can move it by holding the first gripping member 38 and the second gripping member 39.

[0043] Next, the function of the support base 20 will be described.

[0044] The support base 20 of this embodiment includes a fixing member 30 that fixes the projector 10, which has an exhaust port 12 used for ventilation, and a side panel 50 that supports the fixing member 30 in at least a first position P1 and a second position P2. The side panel 50 is provided with a first opening 51A and a second opening 51B at a first position 50A that faces the exhaust port 12 of the projector 10 when the fixing member 30 is in the first position P1, and a second position 50B that faces the exhaust port 12 of the projector 10 when the fixing member 30 is in the second position P2, with the projector 10 fixed to the fixing member 30. Therefore, in this embodiment, when the fixing member 30 that fixes the projector 10 is in the first position P1, the exhaust port 12 of the projector 10 is positioned opposite one of the first openings 51A, and when the fixing member 30 is in the second position P2, the exhaust port 12 of the projector 10 is positioned opposite the other of the second openings 51B. In this way, in this embodiment, since the first opening 51A and the second opening 51B are provided in the side panel 50, ventilation by intake and exhaust can be performed for the projector 10 adjusted to each of the positions P1 and P2, and in particular, the exhaust heat of the projector 10 does not accumulate in the area surrounded by the fixing member 30 that supports the projector 10 or the side panel 50, so that the heat can be efficiently exhausted from the projector 10. Also, even when the fixing member 30 is in a position between the first position P1 and the second position P2, ventilation for the projector 10 can be performed using the first opening 51A and the second opening 51B located nearby.

[0045] In this embodiment, the fixing member 30 is supported relative to the side panel 50 so as to be rotatable from a first position P1 to a second position P2. The plate surface of the side panel 50 intersects with the rotation axis C1 of the fixing member 30. In this manner, in this embodiment, the fixing member 30 rotates about the rotation axis C1 relative to the side panel 50, thereby adjusting the projector 10 fixed to the fixing member 30 to a position of any rotation angle. At this time, the openings 51 provided in the side panel 50 are also concentrated in positions along the circumferential direction around the rotation axis C1, and the openings 51 of the side panel 50 are not only positioned opposite the exhaust port 12 of the projector 10 fixed at an arbitrary angle, but also positioned near the exhaust port 12. Therefore, efficient ventilation can be achieved in all positions of the fixing member 30.

[0046] Furthermore, in this embodiment, the projector 10 is a projector 10 that projects projection light. The fixing member 30 can fix the projector 10 so that the projection light is projected in a direction intersecting the rotation axis C1. In this case, the projector 10 can be rotated around the rotation axis C1 relative to the side panel 50, so that the projection light of the projector 10 can be efficiently projected within a range of rotation angles from the horizontal direction SL to the vertically upward direction, for example.

[0047] According to the support base 20 of this embodiment, the fixing member 30 has a first surface 30a, and the first attitude P1 is an attitude in which the first surface 30a is horizontal, and the second attitude P2 is an attitude in which the fixing member 30 is rotated by 90 degrees with respect to the horizontal direction SL so that the axial direction of the projection axis CA of the projector 10 is tilted vertically upward from the horizontal. A second opening area S2 of the second opening 51B provided at the second position 50B is larger than a first opening area S1 of the first opening 51A provided at the first position 50A. In this case, the exhaust efficiency is highest in the first position P1 in which the projector 10 is installed in the horizontal direction SL, and the exhaust efficiency decreases in the second position P2 in which the projector 10 is oriented perpendicular to the horizontal direction SL. However, since the second opening area S2 of the second opening 51B facing the exhaust port 12 of the projector 10 in the second position P2 is set larger than the first opening area S1 of the first opening 51A, ventilation can be performed efficiently even in the second position P2.

[0048] Furthermore, in this embodiment, the projector 10 includes a projection lens 11 that projects projection light. When the fixing member 30 is in the first posture P1, the distance L0 from the projection lens 11 of the projector 10 to the rotation axis C1 is shorter than the distance L1 from the projection lens 11 to the first opening 51A. In this case, since the rotation axis C1 is closer to the projection lens 11 side than the first opening 51A, the amount of rotation (rotation distance) on the projection lens 11 side when the projector 10 rotates is reduced, and vibration to the projection optical system can be suppressed.

[0049] Furthermore, in this embodiment, the projector 10 includes a projection lens 11 that projects projection light. When the fixing member 30 is in the second posture P2, the distance L0 from the projection lens 11 of the projector 10 to the rotation axis C1 is shorter than the distance L2 from the projection lens 11 to the second opening 51B. In this case, since the rotation axis C1 is closer to the projection lens 11 side than the second opening, the amount of rotation (rotation distance) on the projection lens 11 side when the projector 10 rotates is reduced, and vibration to the projection optical system can be suppressed.

[0050] This embodiment also includes the above-described support base 20 and a display device. The display device is a projector 10 that projects projection light.

[0051] According to at least one of the embodiments described above, it is possible to efficiently exhaust heat from the projector 10 that is mounted so that its attitude can be adjusted.

[0052] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, as well as within the scope of the invention described in the claims and their equivalents.

[0053] In the above-described embodiment, the projector 10 is used as the display device, but the display device is not limited to the projector 10 and may be, for example, a display device such as an FPD (flat panel display).

[0054] Furthermore, the plate material only needs to intersect with the rotation axis about which the fixed member rotates, so the surface direction of the side plate 50 may not be perpendicular to the rotation axis C1 as in this embodiment.

[0055] Furthermore, in this embodiment, the side panels 50 arranged on both sides of the fixing member 30 (projector 10) in the left-right direction X2 are targeted as the plate materials in which the openings 51 are provided, but the side panels 50 are not limited to being plate materials. For example, if the exhaust port 12 of the projector 10 is provided on the rear surface 10B or the top surface 10D, a rear panel or a bottom panel (corresponding to the base pedestal 60 in this embodiment) may be provided on the rear side of the support stand 20, and the opening may be provided in this rear panel or bottom panel. In short, the plate materials are not limited to side panels.

[0056] Furthermore, the openings provided in the plate material are not limited to the configuration in which one opening (first opening 51A, second opening 51B) is provided for each of the first position P1 and the second position P2 as in the above-described embodiment. For example, the opening may be a collection of many holes. Alternatively, as in the support base 20A (display device support base) of a modified example shown in FIG. 9, it may be a single opening (third opening 51C) having both portions 50C facing the exhaust port 12 of the projector 10 in the first position P1 and the second position P2. The third opening 51C of the modified example is formed so as to face the trajectory of the exhaust port 12 of the projector 10 that rotates around the rotation axis C1. Therefore, regardless of the rotation angle at which the projector 10 is fixed from the first position P1 to the second position, the exhaust port 12 faces the third opening 51C, thereby ensuring reliable ventilation.

[0057] The display device support stand according to one aspect of the present invention may have the following configuration. A display device support stand according to one embodiment of the present invention comprises a fixing member for fixing a display device having an air vent for ventilation, and a plate material for supporting the fixing member in at least a first position and a second position, the plate material having openings at a first position facing the air vent of the display device when the fixing member is in the first position and at a second position facing the air vent of the display device when the fixing member is in the second position when the display device is fixed to the fixing member.

[0058] In one embodiment of the display device support stand of the present invention, the fixing member may be supported rotatably relative to the plate material from the first position to the second position, and the plate material may be configured such that the plate surface of the plate material intersects with the rotation axis of the fixing member.

[0059] In one aspect of the display device support stand of the present invention, the display device may be a projector that projects projection light, and the fixing member may be configured to fix the projector so that the projection light is projected in a direction that intersects the rotation axis.

[0060] In one embodiment of the display device support stand of the present invention, the first posture may be a horizontal posture, the second posture may be a posture in which the fixing member is rotated upward from horizontal and perpendicular to the horizontal direction, and the second opening area of ​​the second opening provided at the second position may be larger than the first opening area of ​​the first opening provided at the first position.

[0061] In one embodiment of the display device support stand of the present invention, the display device may be configured to include a projection lens that projects projection light, and when the fixing member is in the first position, the distance from the projection lens of the display device to the rotation axis may be shorter than the distance from the projection lens to the first opening.

[0062] In one embodiment of the display device support stand of the present invention, the display device may be configured to include a projection lens that projects projection light, and when the fixing member is in the second position, the distance from the projection lens of the display device to the rotation axis may be shorter than the distance from the projection lens to the second opening.

[0063] A projection system according to an aspect of the present invention may have the following configuration. A projection system according to one aspect of the present invention includes the display device support stand according to one aspect of the present invention and the display device, wherein the display device is a projector that projects projection light. [Explanation of symbols]

[0064] 1...Projection system, 10...Projector (display device), 11...Projection lens, 12...Exhaust port (vent), 20, 20A...Support base (display device support base), 30...Fixing member, 31...Fixing screw 8, 36...Latching stopper, 36a...Latching pin, 37...Rotation operation member, 38...First gripping member, 39...Second gripping member, 40...Rotation shaft member, 50...Side plate (plate material), 50A...First position, 50B...Second position, 51...Opening, 51A...First opening, 51B...Second opening, 51C...Third opening, 52, 52A, 52B...Engagement hole, 60...Base stand, 61...Wheel, C1...Rotation shaft, CA...Projection axis, P1...First position, P2...Second position, S1...First opening area, S2...Second opening area, X1...Fore-aft direction, X2...Left-right direction

Claims

1. a fixing member for fixing the display device, the fixing member having a vent hole for ventilation; a plate member that supports the fixing member in at least a first position and a second position; Equipped with The plate member has a first opening at a first position facing the vent hole of the display device when the fixing member is in a first position with the display device fixed to the fixing member, and a second opening at a second position facing the vent hole of the display device when the fixing member is in a second position. A display device support stand characterized by:

2. the fixing member is supported rotatably relative to the plate member from the first position to the second position, The plate member has a surface that intersects with the rotation axis of the fixing member.

2. The display device support stand according to claim 1.

3. the display device is a projector that projects projection light, the fixing member is capable of fixing the projector so that the projection light is projected in a direction intersecting the rotation axis, 3. The display device support stand according to claim 2.

4. the fixing member has a first surface; the first attitude is an attitude in which the first surface is horizontal, the second attitude is an attitude in which the fixing member is rotated by 90 degrees with respect to the horizontal direction so that the axial direction of the projection axis of the projector is tilted vertically upward from the horizontal direction, a second opening area of ​​the second opening provided at the second position is larger than a first opening area of ​​the first opening provided at the first position; 4. The display device support stand according to claim 3.

5. the display device includes a projection lens that projects projection light; When the fixing member is in the first position, a distance from the projection lens to the rotation axis of the display device is shorter than a distance from the projection lens to the first opening.

5. The display device support stand according to claim 4.

6. the display device includes a projection lens that projects projection light; When the fixing member is in the second position, a distance from the projection lens to the rotation axis of the display device is shorter than a distance from the projection lens to the second opening.

5. The display device support stand according to claim 4.

7. A display device support stand according to any one of claims 1 to 6, and the display device, The display device is a projector that projects projection light. A projection system characterized by:

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