Projection cabinet and projection system

Abstract

The invention provides a projection cabinet and a projection system. The reliability of alignment precision of the projection cabinet is improved. A projection cabinet (2) is provided with: a cabinet main body (10) as a housing that houses a projector (3) that emits projection light (Lp) as light as a projection image (P) projected onto a wall surface (W), and that has an opening (31) as a first opening through which the projection light (Lp) passes; a lower assembly (20) as an installation part disposed in the cabinet main body (10), the projector (3) being installed on the lower assembly (20); and a projection (21p) which is disposed on the cabinet main body (10), protrudes toward the wall surface (W) side, and is positioned at a predetermined position where the projection image (P) is displayed on the wall surface (W) by bringing the projection (21p) into contact with the wall surface (W).

Description

Technical Field

[0001] The present invention relates to a projection cabinet and a projection system. Background Art

[0002] As a furniture that can be moved while housing a projector, a cabinet described in Patent Document 1 is known.

[0003] According to the cabinet described in Patent Document 1, a user can easily align the cabinet to an appropriate projection position.

[0004] In aligning the cabinet, a lid of the cabinet is used. After the user opens the lid and makes the end of the lid protrude toward the wall side, the user moves the cabinet and makes the end of the lid abut against the wall, whereby the cabinet can be aligned to an appropriate projection position. In addition, the appropriate projection position is a position where a rectangular projection image can be projected onto a screen.

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2022-59236

[0006] If there are machining errors or assembly errors in the lid used for aligning the cabinet, the alignment accuracy is reduced, which may cause deformation of the projection image and deterioration of the image quality.

[0007] Therefore, it is desired to further improve the reliability of the alignment accuracy. Summary of the Invention

[0008] A projection cabinet according to one aspect of the present application includes: a housing that houses a projector that emits light as a projection image projected onto a projection surface, the housing having a first opening through which the light passes; a setting portion that is disposed in the housing and on which the projector is disposed; and a protruding portion that is disposed in the housing and protrudes toward the projection surface side. By bringing the protruding portion into contact with the projection surface, the projector is positioned at a specified position where the projection image is displayed on the projection surface.

[0009] A projection system according to one aspect of the present application includes: a projector that emits light as a projection image projected onto a projection surface; and a projection cabinet that houses the projector, the projection cabinet having: a housing that has a first opening through which the light passes; a setting portion that is disposed in the housing and on which the projector is disposed; and a protruding portion that is disposed in the housing and protrudes toward the projection surface side. By bringing the protruding portion into contact with the projection surface, the projector is positioned at a specified position where the projection image is displayed on the projection surface. Brief Description of the Drawings

[0010] Figure 1 It is a front perspective view showing a schematic structure and a setting method of a projection system.

[0011] Figure 2It is a rear perspective view showing the schematic structure and installation method of the projection system.

[0012] Figure 3 It is a right side view showing the schematic structure and installation method of the projection system.

[0013] Figure 4 It is a top view showing the schematic structure and installation method of the projection system.

[0014] Figure 5A It is a table showing the screen size and dimensions of the projection system.

[0015] Figure 5B It is a table showing the throw ratio of the projection system.

[0016] Figure 6 It is an exploded perspective view of the projection cabinet.

[0017] Figure 7 It is an exploded perspective view of the cabinet main body.

[0018] Figure 8 It is a front perspective view showing the schematic structure of the projection cabinet.

[0019] Figure 9 It is a rear perspective view showing the schematic structure of the projection cabinet.

[0020] Figure 10 It is an enlarged right side view of the protrusion.

[0021] Figure 11 It is a top view of the operation panel.

[0022] Figure 12 It is a block diagram showing the structure of the controller.

[0023] Figure 13 It is a diagram showing an example of the cable routing of the projection cabinet.

[0024] Reference numeral description

[0025] 1: Projection system; 2: Projection cabinet; 3: Projector; 3b: Rear side; 3e: Exhaust port; 3m: Leg; 3p: Projection light source unit; 4: Operation panel; 5: Web camera; 6: Controller; 7: Calibration unit; 8: AV input port; 9: AC inlet; 10: Cabinet main body; 11: Power supply port; 12: Speaker; 13: Internal video IF; 14: Internal power board; 15: Rack mounting angle steel; 15s: 19-inch rack space; 16: Support member; 17: Wiring hole; 18: Other devices; 20: Lower assembly; 20s: Storage space; 21: Pedestal; 21a: Through hole; 21c: Fixing part; 21f: End face; 21p: Protrusion; 22: Right side plate; 22c: Mounting hole; 23: Left side plate; 24: Front plate; 25: Bottom plate; 26: Front cover; 27: Rear lower cover; 27h: Cutout; 28: Caster; 29: Handle; 29a: First hole; 29b: Second hole; 30: Upper assembly; 31: Opening; 32: Opening; 33, 34: Cutout; 35a: Top plate; 35b: Top plate; 35h: Mounting hole; 36: Right side plate; 36c: Mounting hole; 37: Left side plate; 38: Front plate; 39: Back plate; 39h: Cutout; 41, 42, 42a, 42b, 43, 44, 45: Operation button; 61: CPU; 62: Digital I / O port; 63a, 63b, 63c: I / F; 64: Digital I / O port; 71: PC; 72: Socket; S: Picture size; Zw: Dimension; Dh: Dimension; Ch: Dimension; Ph: Dimension; Pd: Dimension; Yd: Dimension; Pw: Length; Cp: Image center; P: Projection image; Lp: Projection light; W: Wall surface; FL: Floor; T: Table. Detailed implementation mode

[0026] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0027] In addition, in the following respective drawings, in order to easily observe each component, the scale of the dimensions may be shown differently according to the component.

[0028] In addition, hereinafter, for the sake of convenience of explanation, three mutually orthogonal axes are set as the X-axis, Y-axis, and Z-axis. The direction parallel to the X-axis is also referred to as the "X-axis direction", the direction parallel to the Y-axis is also referred to as the "Y-axis direction", and the direction parallel to the Z-axis is also referred to as the "Z-axis direction". In addition, the front end side in the arrow direction of each axis is also referred to as the "positive side", and the opposite side is referred to as the "negative side". In addition, hereinafter, the surface on the negative side of the X-axis direction is also referred to as the "front surface", the surface on the positive side of the X-axis direction is also referred to as the "rear surface", the surface on the negative side of the Y-axis direction is also referred to as the "left side surface", the surface on the positive side of the Y-axis direction is also referred to as the "right side surface", the surface on the positive side of the Z-axis direction is also referred to as the "upper surface", and the surface on the negative side of the Z-axis direction is also referred to as the "lower surface".

[0029] 1. Projection system

[0030] 1.1. Schematic structure and setting method of the projection system

[0031] Refer to Figures 1 to 4 The schematic structure and setting method of the projection system 1 will be described.

[0032] Figure 1 It is a front perspective view showing the schematic structure and setting method of the projection system 1. Figure 2 It is a rear perspective view showing the schematic structure and setting method of the projection system 1. Figure 3 It is a right side view showing the schematic structure and setting method of the projection system 1. Figure 4 It is a top view showing the schematic structure and setting method of the projection system 1. Additionally, in Figure 3 and Figure 4 the description of the web camera 5, controller 6, and calibration unit 7 is omitted.

[0033] As Figure 1 or Figure 2 shown, the projection system 1 has a projection cabinet 2 and a projector 3 mounted on the projection cabinet 2. The projection cabinet 2 can be paraphrased as a certain device.

[0034] The projection cabinet 2 has a cabinet main body 10 and an operation panel 4. In this embodiment, the cabinet main body 10 is an example of a housing.

[0035] The cabinet main body 10 has a lower assembly 20 and an upper assembly 30, and is box-shaped as a whole.

[0036] The projector 3 is housed between the lower assembly 20 and the upper assembly 30. More specifically, the projector 3 is provided on the upper surface of the lower assembly 20 and is housed in a state of being surrounded by the upper assembly 30 above and on all four sides. In this embodiment, the lower assembly 20 is an example of a setting part.

[0037] An opening 31 is provided on the upper surface of the upper assembly 30. The opening 31 is an opening provided to allow the projection light Lp emitted from the projection light source part 3p of the projector 3 to pass through. In this embodiment, the opening 31 is an example of the first opening.

[0038] The projection cabinet 2 has casters 28 at the four corners of the lower surface of the lower assembly 20. If the locking of the casters 28 is released, the user can move the projection cabinet 2 to a desired location. For example, the user can move the projection cabinet 2 from the living room to the meeting room, or from one meeting room to another meeting room.

[0039] The user sets the projection cabinet 2 at a specified projection position in the meeting room. At this time, the back surface of the projection cabinet 2 is set to face the wall surface W.

[0040] Specifically, asFigure 3 and Figure 4 As shown in Figure 3 and Figure 4 , the user moves the projection cabinet 2 so that the entire surface of the end face 21f of the protrusion 21p of the lower assembly 20 abuts against the wall surface W.

[0041] The position where the entire surface of the end face 21f of the protrusion 21p of the lower assembly 20 abuts against the wall surface W is a specified projection position. In the present embodiment, the position where the protrusion 21p of the lower assembly 20 abuts against the wall surface W is an example of the specified position where the projector 3 displays the projection image P on the wall surface W as the projection surface. In addition, the specified position can be paraphrased as the specified projection position. Further, the protrusion 21p is an example of a protruding portion.

[0042] As Figure 1 or Figure 2 shown, after the projection cabinet 2 is set at the specified projection position, the projector 3 is started, and the projection light Lp is projected from the projection light source unit 3p toward the wall surface W. In the present embodiment, the wall surface W is an example of a projection surface. The projection surface is not limited to the wall surface W. The projection surface is not limited to the plane of a rigid body, and may also be a screen formed of cloth or a sheet material.

[0043] As Figure 2 or Figure 4 shown, the projection light source unit 3p is a part where the projection light Lp generated inside the projector 3 is emitted outside the housing of the projector 3. In other words, the projection light source unit 3p is the light exit port where the projector 3 emits the projection light Lp. The projection light source unit 3p is preferably covered with a light-transmitting plate such as glass or synthetic resin, but may also be an opening.

[0044] As Figure 1 or Figure 2 shown, when the projection light Lp is projected from the projection light source unit 3p of the projector 3 toward the wall surface W, the projection image P is displayed on the wall surface W. In the present embodiment, the projection light Lp is an example of light.

[0045] The screen size S of the projection image P is, for example, 80 inches. The screen size S is not limited to 80 inches. For example, it may also be 100 inches or 120 inches. In addition, the projection image P is rectangular. That is, the lengths of the diagonals of the projection image P are equal, and the midpoint of the diagonal of the projection image P coincides with the image center Cp.

[0046] 1.2. Size and projection ratio of the projection system

[0047] The projection system 1 is designed such that when the projection system 1 is set at the specified projection position, the positional relationship with respect to the ground FL or the wall surface W becomes a specified size according to the screen size S of the projection image P. Figures 1 to 3 The definitions of the respective dimensions related to the specified size are shown.

[0048] As Figure 3As shown, the dimension Ph is the height from the ground FL where the projection cabinet 2 is provided to the upper surface of the lower assembly 20 where the projector 3 is provided. Specifically, the upper surface of the lower assembly 20 is the upper surface of the pedestal 21. In addition, the upper surface of the lower assembly 20 or the upper surface of the pedestal 21 is an example of the installation surface for installing the projector 3.

[0049] The dimension Dh is the height from the ground FL where the projection cabinet 2 is provided to the lower end of the projected image P.

[0050] The dimension Pd is the length from the end face 21f of the protrusion 21p that abuts against the wall surface W as the projection surface to the back surface 3b of the projector 3. In the present embodiment, the back surface 3b of the projector 3 is an example of the surface on the projection surface side of the projector 3.

[0051] The dimension Ch is the height from the ground FL to the upper surface of the upper assembly 30.

[0052] The dimension Yd represents the projection distance and is the length from the center of the projection light source unit 3p to the wall surface W as the projection surface.

[0053] As Figure 1 and Figure 2 shown, the dimension Zw represents the horizontal length of the projected image P.

[0054] Figure 5A is a table showing the respective screen sizes S and the respective dimensions Dh, Ph, Pd of the projection system 1. The values recorded in this table show the preferred values of the respective dimensions for two types of projectors A and B with different specifications according to each screen size S of the projected image P. The projector A and the projector B are each an example of the projector 3.

[0055] The projection ratios of the projector A and the projector B are different. Specifically, the projector A is a short-focus projector with a projection ratio smaller than that of the projector B.

[0056] First, the respective screen sizes S and the respective dimensions Dh, Ph, Pd of the projector A will be described.

[0057] The screen size S represents the size of the projected image P and the unit is inches.

[0058] In the projector A, when the target screen size is 100 inches, the minimum value of the projected image P is 100 inches and the maximum value is 105 inches. The target screen size represents the desired screen size that the projector A is desired to display.

[0059] When the screen size S of the projected image P of the projector A is at the minimum value of 100 inches, it is preferable to set the dimension Dh to 75.0 cm, the dimension Ph to 38.0 cm, and the dimension Pd to 9.0 cm. It is preferable to set the values of the respective dimensions Dh, Ph, and Pd in this way. By setting the values of the respective dimensions Dh, Ph, and Pd in this way, a high-quality rectangular projected image P with suppressed distortion and image quality degradation can be easily displayed on the wall surface W without making fine adjustments.

[0060] In addition, the dimension Ch is set to a value between the dimension Dh and the dimension Ph. Preferably, as Figure 2 shown, if it is set to the same value as the height of the table T in the meeting room, the sense of unity with the table T can be enhanced.

[0061] According to Figure 5A the table, when the screen size S of the projected image P of the projector A is from 80 inches to 126 inches, it is preferable that the dimension Dh is 75.0 cm or more and 95.0 cm or less, the dimension Ph is 34.0 cm or more and 64.0 cm or less, and the dimension Pd is 2.0 cm or more and 20.0 cm or less. By setting the projection system 1 to such specifications, a high-quality rectangular projected image P with suppressed distortion and image quality degradation can be easily displayed on the wall surface W without making fine adjustments.

[0062] Next, each screen size S and each dimension Dh, Ph, Pd of the projector B will be described.

[0063] When the target screen size of the projector B is 80 inches, the minimum value of the projected image P is 80 inches and the maximum value is 84 inches.

[0064] When the screen size S of the projected image P of the projector B is at the minimum value of 80 inches, it is preferable to set the dimension Dh to 75.0 cm, the dimension Ph to 35.0 cm, and the dimension Pd to 16.0 cm. By setting the values of the respective dimensions Dh, Ph, Pd in this way, a high-quality rectangular projected image P with suppressed distortion and image quality degradation can be easily displayed on the wall surface W without making fine adjustments.

[0065] According to Figure 5A the table, when the screen size S of the projected image P of the projector B is from 80 inches to 126 inches, it is preferable that the dimension Dh is 75.0 cm or more and 95.0 cm or less, the dimension Ph is 23.0 cm or more and 57.0 cm or less, and the dimension Pd is 16.0 cm or more and 47.0 cm or less. By setting the projection system 1 to such specifications, a high-quality rectangular projected image P with suppressed distortion and image quality degradation can be easily displayed on the wall surface W without making fine adjustments.

[0066] Figure 5B It is a table showing the projection ratios of projector A and projector B. The projection ratio is a value obtained by dividing size Yd by size Zw. The smaller the projection ratio of the projection optical system of projector 3, the shorter the projection distance when projecting image P on wall surface W.

[0067] First, the projection ratio of projector A will be described.

[0068] The aspect ratio represents the aspect ratio of projection image P. Wide represents the projection ratio at the wide-angle end of the projection optical system, and Tele represents the projection ratio at the telephoto end of the projection optical system.

[0069] For example, when the aspect ratio is 16:9, the Wide projection ratio is 0.16 and the Tele projection ratio is 0.22.

[0070] According to Figure 5B the table, the projection ratio of projector A is 0.16 or more and 0.29 or less.

[0071] Next, the projection ratio of projector B will be described.

[0072] For example, when the aspect ratio is 16:10, the Wide projection ratio is 0.27 and the Tele projection ratio is 0.37.

[0073] According to Figure 5B the table, the projection ratio of projector B is 0.27 or more and 0.44 or less.

[0074] 2. Projection cabinet

[0075] With reference to Figures 6 to 11 the structure of projection cabinet 2 will be described.

[0076] Figure 6 is an exploded perspective view of projection cabinet 2. Figure 7 is an exploded perspective view of cabinet main body 10. Figure 8 is a front perspective view of projection cabinet 2. Figure 9 is a rear perspective view of projection cabinet 2. Figure 10 is an enlarged right side view of protrusion 21p. Figure 11 is a top view of operation panel 4.

[0077] As Figure 6 shown, projection cabinet 2 has cabinet main body 10 and operation panel 4.

[0078] As Figure 7 shown, cabinet main body 10 is composed of lower component 20 and upper component 30, and considering maintainability, lower component 20 and upper component 30 are combined in a detachable manner.

[0079] The lower component 20 and the upper component 30 are combined and fixed with accessories and other fixing parts. In addition, in order not to damage the appearance, the fixing parts are arranged at positions that are not visible from the outside. Appearance can be paraphrased as aesthetics.

[0080] 2.1. Lower Component

[0081] As Figure 6 and Figure 7 As shown, the lower component 20 has a rectangular parallelepiped shape surrounded by a pedestal 21, a right side plate 22, a left side plate 23, a front plate 24, a front cover 26, a bottom plate 25, and a rear lower cover 27 on six sides. Casters 28 are provided at the four corners of the lower surface of the bottom plate 25.

[0082] Two casters 28 on the front side are lockable, and two casters 28 on the back side are not lockable. In addition, as will be described later, the projection cabinet 2 can be carried by a handle 29, so it can also be configured without installing the casters 28.

[0083] As Figure 8 and Figure 9 As shown, a storage space 20s is provided inside the lower component 20. It can enter and exit the storage space 20s through the front cover 26 provided on the front surface of the lower component 20 in an openable and closable manner or the rear lower cover 27 provided on the back surface of the lower component 20 in an openable and closable manner.

[0084] As Figure 8 As shown, by opening the front cover 26, the user can access the speaker 12 and the internal video IF (Interface) 13 stored in the storage space 20s from the front surface of the projection cabinet 2.

[0085] The internal video IF 13 is a port for video and / or sound, and has ports such as MIDI (Musical Instrument Digital Interface) and USB (Universal Serial Bus). The internal video IF 13 is connected to the AV (Audio Visual) input port 8 provided on the upper component 30, and video signals and / or sound signals are supplied from an external device via the AV input port 8.

[0086] The speaker 12 is an AV device capable of outputting a large volume. In this embodiment, the speaker 12 is provided in the storage space 20s in a state of being mounted on a 19-inch storage rack.

[0087] The speaker 12 is stored in the case of use in situations that require a large volume, such as in a large conference room or an open space. Therefore, when a large volume is not required, the speaker 12 can also not be stored.

[0088] As Figure 9As shown, by opening the rear lower cover 27, the user can access the internal power supply board 14 stored in the storage space 20s from the back of the projection cabinet 2. The cutout 27h provided in the rear lower cover 27 can be used as a handle when opening the rear lower cover 27.

[0089] Power supply lines such as the projector 3, the speaker 12, the power supply port 11 provided on the upper assembly 30, and the network camera 5 are connected to the internal power supply board 14, and AC power is supplied from an outlet (not shown) via the AC (Alternating Current) inlet 9 provided on the right side plate 22.

[0090] In addition, in the storage space 20s, there is provided a rack mounting angle steel 15 for forming a 19-inch rack space 15s conforming to the EIA (Electronic Industries Alliance) standard. Conference system equipment, batteries, and other 19-inch equipment are stored in the 19-inch rack space 15s.

[0091] 2.1.1. Pedestal

[0092] As Figure 6 and Figure 7 shown, the pedestal 21 is the top plate of the lower assembly 20.

[0093] The projector 3 is provided on the upper surface of the pedestal 21. In other words, the pedestal 21 has a setting surface for setting the projector 3.

[0094] The pedestal 21 has a fixing portion 21c, a through hole 21a, a protrusion 21p, a handle 29, a wiring hole 17, and a support member 16.

[0095] 2.1.1.1. Fixing of the projector

[0096] The fixing portion 21c is provided to fix the projector 3 to the upper surface of the pedestal 21. By having the fixing portion 21c, it is possible to suppress the positional deviation of the projector 3 in the projection cabinet 2 due to the movement of the projection cabinet 2 or the like.

[0097] The fixing portion 21c is provided at two positions corresponding to the positions of the legs 3m of the projector 3.

[0098] In the present embodiment, the fixing portion 21c is a concave portion. By inserting the front ends of the legs 3m of the projector 3 into this concave portion, the projector 3 is fixed. In addition, the fixing portion 21c is not limited to a concave portion. For example, it may also be a through hole, an L-shaped columnar body, an angle steel, a bracket, or the like. In addition, the positions where the fixing portion 21c is arranged are not limited to two. As long as the required number of fixing portions 21c for suppressing the positional deviation of the projector 3 is provided at the necessary positions.

[0099] 2.1.1.2. Opening for aspirating the projector

[0100] The through hole 21a is an opening for air intake of the projector 3, and is provided in the pedestal 21 at a position corresponding to the air intake port of the projector 3.

[0101] Through the through hole 21a, the projector 3 can stably suck in necessary and sufficient cooling air via the through hole 21a. In the present embodiment, the through hole 21a is an example of the second opening.

[0102] In the present embodiment, the projector 3 has air intake ports at two locations, i.e., the center of the bottom surface and the front surface side. Therefore, the through holes 21a are also provided at two locations corresponding to the air intake ports. In addition, the through hole 21a provided at one location may also be composed of a plurality of through holes or slits formed by punching or slitting.

[0103] 2.1.1.3. Protrusion

[0104] The protrusion 21p is a part on the back side of the pedestal 21, and is the part that protrudes most toward the positive side in the X-axis direction in the cabinet main body 10.

[0105] As Figure 10 shown, the protrusion 21p protrudes by a length Pw from the back surface of the rear lower cover 27 or the back plate 39 of the upper assembly 30. In the present embodiment, the length Pw is 2 mm or more and 5 mm or less. By setting the dimension of the length Pw to 2 mm or more and 5 mm or less, the influence on the appearance can be minimized.

[0106] The end face 21f of the protrusion 21p constitutes a reference plane when positioning the projector 3 at a specified projection position. In the present embodiment, as Figure 4 shown, the end face 21f is a continuous plane. In addition, the end face 21f is not limited to a plane. As long as the end face 21f can constitute a reference plane, it may also have irregularities.

[0107] In the projection cabinet 2 of the present embodiment, the protrusion 21p used when positioning the projector 3 at a specified projection position is provided integrally with the pedestal 21. In addition, the projector 3 is provided on the pedestal 21. In other words, the only component between the wall surface W against which the protrusion 21p abuts and the projector 3 is the pedestal 21.

[0108] Therefore, the possibility of manufacturing deviations and assembly errors can be reduced. Also, the possibility of wobbling due to use and the passage of time can be suppressed. Therefore, the reliability of the alignment accuracy can be improved.

[0109] On the other hand, the technology described in Patent Document 1 has a plurality of components between the wall and the projector, including a cover, a bottom plate on which the projector is provided, and four panels provided between the cover and the bottom plate. And the cover for alignment of the cabinet is composed of three plate-like components. In other words, the cover is composed of three components. Thus, since the technology described in Patent Document 1 has a plurality of components between the wall and the projector, it is more susceptible to manufacturing deviations and assembly errors compared with the present embodiment. Also, the technology described in Patent Document 1 has a higher possibility of generating shaking due to use and the passage of time compared with the present embodiment.

[0110] 2.1.1.4. Handle

[0111] As Figure 6 and Figure 7 shown, handles 29 are provided on the left and right sides of pedestal 21. The handles 29 are used when moving projection cabinet 2. For example, at a location where there are steps that casters 28 cannot cross, the user can grasp handle 29 with the hand and lift projection cabinet 2 to cross the steps.

[0112] The handle 29 on the right side is the part between the through-hole provided in the right side plate 22, i.e., the first hole 29a, and the through-hole provided in pedestal 21, i.e., the second hole 29b. The handle 29 on the left side is the part between the through-hole provided in the left side plate 23, i.e., the first hole 29a as shown in Figure 9 and the through-hole provided in pedestal 21, i.e., the second hole 29b.

[0113] As Figure 6 and Figure 7 shown, the first hole 29a and the second hole 29b are communicated through the accommodation space 20s of the lower assembly 20, and the user can grasp the handle 29 by inserting the hand from the first hole 29a into the second hole 29b.

[0114] 2.1.1.5. Wiring holes, supports, and mounting holes

[0115] The wiring holes 17 are holes for cable wiring. Five or six wiring holes 17 are arranged on the back 3b side of the projector 3 of the pedestal 21. Thus, since a plurality of wiring holes 17 are provided on the back 3b side of the projector 3 of the pedestal 21, the wiring operation is easy and beautiful cable wiring can be performed.

[0116] The supports 16 are provided at the four corners of the upper surface of the pedestal 21 at positions where they abut against the inside of the upper assembly 30. The supports 16 are supports that bear the load when the upper assembly 30 is pressed. Therefore, even when the user presses the upper assembly 30, the entire projection cabinet 2 including the lower assembly 20 can be smoothly moved.

[0117] As Figure 7As shown, mounting holes 22c are provided in the right side plate 22. The AC inlet 9 is mounted in the mounting hole 22c. The AC inlet 9 is a connector for connecting an AC cable.

[0118] 2.2. Upper assembly

[0119] As Figure 6 shown, the upper assembly 30 has a rectangular parallelepiped shape that encloses five sides except the lower surface by two top plates 35a, 35b, a right side plate 36, a left side plate 37, a front plate 38, and a back plate 39.

[0120] The upper assembly 30 is fixed to the upper surface of the pedestal 21.

[0121] On the upper surface of the top plate 35a, an operation panel 4, a network camera 5, a controller 6, and a calibration unit 7 are provided. In addition, an AV input port 8 is provided on the right side surface of the right side plate 36.

[0122] 2.2.1. Opening for the projector to project light

[0123] An opening 31 is provided on the upper surface of the upper assembly 30. The opening 31 is an opening for the projection light Lp of the projector 3. As described above, the projection light Lp emitted from the projection light source unit 3p passes through the opening 31 and is displayed on the wall surface W as the projection surface. As Figure 4 shown, the opening 31 exposes the projection light source unit 3p of the projector 3 in a top view.

[0124] As Figure 7 shown, the opening 31 is a part of the space between the top plate 35a on the front surface side of the upper assembly 30 and the top plate 35b on the back surface side.

[0125] 2.2.2. Opening for the projector to exhaust air

[0126] As Figure 8 shown, the cutout 33 provided in the right side plate 36 is an opening for the projector 3 to exhaust air and is provided at a position corresponding to the exhaust port 3e on the right side surface of the projector 3. In addition, as Figure 9 shown, the cutout 34 provided in the left side plate 37 is an opening for the projector 3 to exhaust air and is provided at a position corresponding to the exhaust port 3e on the left side surface of the projector 3.

[0127] Through the cutout 33 and the cutout 34, the projector 3 can easily discharge the air discharged from the projector 3 to the outside of the projection cabinet 2 via the cutout 33 and the cutout 34. In the present embodiment, the cutout 33 and the cutout 34 are an example of the third opening. In addition, the cutout 33 and / or the cutout 34 may be through holes, and may also be composed of a plurality of through holes or slits formed by punching or slit processing.

[0128] 2.2.3. Opening for Projector Focus Adjustment

[0129] As shown Figure 8 in Figure 8 , the opening 32 provided in the right side plate 36 is an opening for adjusting the focus rod of the projector 3 and is provided at a position corresponding to the focus rod of the projector 3. By providing the opening 32, the user can easily access the focus rod of the projector 3 and adjust the focus of the projected image P. Therefore, with the projection cabinet 2 according to the present embodiment, the operability of the projector 3 can be suppressed from being impaired.

[0130] 2.2.4. Mounting Holes

[0131] As shown Figure 7 in Figure 7 , the upper assembly 30 has mounting holes 35h, 36c.

[0132] The mounting hole 35h is provided in the top plate 35a. The network camera 5 is fixed to the top plate 35a using the mounting hole 35h. The network camera is a device for video conferencing equipped with a camera, a microphone, and a speaker.

[0133] The mounting hole 36c is provided in the right side plate 36. The AV input port 8 is mounted in the mounting hole 36c. The AV input port 8 includes an HDMI (registered trademark) (High Definition Multimedia Interface) connector, a USB (Universal Serial Bus) connector, and the like.

[0134] As shown Figure 9 in Figure 9 , the power supply port 11 is mounted on the left side plate 37. The power supply port 11 is mounted using a mounting hole (not shown). The power supply port 11 is a port for USB power supply.

[0135] 2.2.5. Opening for Maintenance

[0136] As shown Figure 9 in Figure 9 , the back plate 39 is mounted on the top plate 35b so as to be openable and closable. The user can open the back plate 39 using the cutout 39h of the back plate 39.

[0137] By setting the back plate 39 in an open state, a relatively large opening can be provided on the back surface of the upper assembly 30. The user can easily perform maintenance of the projector 3 and wiring work using the wiring hole 17 using this opening.

[0138] 2.3. Operation Panel

[0139] As shown Figure 11 in Figure 11 , the operation panel 4 has operation buttons 41, 42a, 42b, 43, 44, 45 for controlling the projector 3 and / or the speaker 12. In the present embodiment, the operation buttons 41, 42a, 42b, 43, 44, 45 are an example of operating members.

[0140] The operation buttons 41 , 42 a , 42 b , 43 , 44 , and 45 are operation buttons corresponding to five functions: power, volume adjustment, mute, video source switching, and automatic adjustment.

[0141] In the present embodiment, the above five functions are selected from the viewpoint of usage frequency.

[0142] The power supply includes a function of turning on the power of the projector 3 and the speaker 12 and a function of turning off the power of the projector 3 and the speaker 12. One operation button 41 is provided corresponding to these two functions. The operation button 41 is a power button.

[0143] By clicking the operation button 41, the power is turned on. Specifically, the projector 3 and the speaker 12 are switched from the standby state to the active state. In addition, by long pressing the operation button 41, the power is turned off. Specifically, the projector 3 and the speaker 12 are switched from the active state to the standby state.

[0144] The volume adjustment includes a function of increasing the volume of the speaker 12 by one unit, a function of decreasing the volume by one unit, a function of continuously increasing the volume, and a function of continuously decreasing the volume, and two operation buttons 42 are provided corresponding to these four functions. The operation button 42a is a volume UP button, and the operation button 42b is a volume DOWN button.

[0145] By clicking the operation button 42a, the volume of the projector 3 and the speaker 12 increases by one unit. By pressing and holding the operation button 42a, the volume increases continuously. By clicking the operation button 42b, the volume decreases by one unit. By pressing and holding the operation button 42b, the volume decreases continuously.

[0146] The mute function includes a function of muting the projector 3 and the speaker 12 and a function of releasing the mute state, and one operation button 43 is provided corresponding to these two functions. The operation button 43 is a mute button.

[0147] The sound is muted by clicking the operation button 43. In the muted state, the sound is released by clicking the operation button 43.

[0148] Image source switching is a function of switching the image source of the projector 3, and one operation button 44 is provided corresponding to this function. The operation button 44 is an image source switching button.

[0149] By clicking the operation button 44 , the video source is switched. Specifically, the content of the displayed projection image P is switched. If the projector 3 has a plurality of input terminals for video sources, the video source is cyclically switched every time the operation button 44 is clicked.

[0150] Auto - adjustment is the function of adjusting the field - of - view angle of the projector 3 to a rectangle, and an operation button 45 is set corresponding to this function. The operation button 45 is an auto - adjustment button.

[0151] By clicking the operation button 45, the view - angle adjustment starts, and when the view - angle adjustment ends, it returns to the startup state.

[0152] The operation panel 4 can also be a touch panel. In this case, as the operation buttons 41, 42a, 42b, 43, 44, 45, various operation - related icons are displayed on the display screen. The user can perform operations related to the above - mentioned 5 functions by clicking or long - pressing the icons.

[0153] In the operation panel 4, the number of types of functions that can be operated is preferably more than one and less than five. By making the number of types of functions that can be operated in the operation panel 4 more than one and less than five, simple and intuitive operations can be performed.

[0154] In addition, in the operation panel 4, when the number of types of functions that can be operated is set to 4 or less, the required functions can be selected from the above - mentioned 5 functions of power supply, volume adjustment, mute, video - source switching, and auto - adjustment. Also, as the functions that can be operated through the operation panel 4, functions other than the above 5 can also be selected.

[0155] Multiple functions are assigned to the operation buttons 41, 42a, 42b, 43, 44, 45 respectively, but the number of types of functions that can be operated using the operation buttons 41, 42a, 42b, 43, 44, 45 respectively is one. For example, 2 functions of turning on the power supply and turning off the power supply are assigned to the operation button 41, but both are functions related to the power supply, and the number of types of functions is one.

[0156] In this way, by making the number of types of functions assigned to each operation button 41, 42a, 42b, 43, 44, 45 one, a simple structure can be achieved.

[0157] 2.4. Controller

[0158] Figure 12 It is a block diagram showing the structure of the controller 6. The controller 6 has a CUP (Central Processing Unit) 61, a digital I / O (Input / Output) port 62, multiple I / F (Interface) 63a, 63b, 63c, and a digital I / O port 64.

[0159] The digital I / O port 62 is connected to the operation panel 4 via a cable. A projector 3 is connected to the I / F 63a, and a speaker 12 is connected to the I / F 63b. Other devices 18 can also be connected to the I / F 63c. The digital I / O port 64 is connected to the correction unit 7.

[0160] The CPU 61 controls the projector 3 and / or the speaker 12 based on the operation signal from the operation panel 4. The correction unit 7 has sensors such as an illuminance sensor, and the CPU 61 corrects the projection brightness of the projector 3 to an appropriate value according to the signal from the correction unit 7.

[0161] 2.5. An Example of Cable Wiring

[0162] Figure 13 It is a diagram showing an example of the cable wiring of the projection cabinet 2.

[0163] In the projection cabinet 2 of the present embodiment, in the cabinet main body 10, in addition to the projector 3, an operation panel 4, a network camera 5, a controller 6, a correction unit 7, an AV input port 8, an AC inlet 9, a power supply port 11, a speaker 12, an internal video IF 13, and an internal power board 14 are also encapsulated.

[0164] As Figure 13 shown, the projection cabinet 2 is stored in a state where the cable wiring has been pre-completed so that it can be used immediately.

[0165] 2.6. An Example of Usage

[0166] Next, an example of the usage of the projection cabinet 2 will be described.

[0167] The user moves the projection cabinet 2 to the conference room and sets the projection cabinet 2 at a specified projection position. At this time, the user can easily set the projection cabinet 2 at the specified projection position only by bringing the protrusion 21p of the projection cabinet 2 into contact with the wall surface W of the conference room.

[0168] The user connects the power cable to the AC inlet 9 of the projection cabinet 2 and connects this power cable to the socket 72. In addition, the user connects the user's PC 71 to the AV input port 8.

[0169] The user clicks the operation button 41 of the operation panel 4 to start the projector 3 and the speaker 12.

[0170] The user clicks the operation button 45 to perform the field angle adjustment of the projector 3.

[0171] The user operates the operation button 42a or the operation button 42b to adjust the volume.

[0172] When the image source is not the desired source, the user operates the operation button 44 to change it to the desired source.

[0173] When the use of the projection cabinet 2 is finished, the user clicks the operation button 41 to cut off the power supply of the projector 3 and the speaker 12.

[0174] The user unplug the power cable and the user's PC 71 from the projection cabinet 2 and tidy up the projection cabinet 2.

[0175] As described above, the projection cabinet 2 of the present embodiment includes: a cabinet main body 10 as a housing, which houses a projector 3 that emits a projection light Lp as light to project a projection image P onto a wall surface W as a projection surface, and has an opening 31 as a first opening through which the projection light Lp passes; a lower assembly 20 as a setting portion, which is disposed in the cabinet main body 10, and the projector 3 is disposed on the lower assembly 20; and a protrusion 21p as a protruding portion, which is disposed in the cabinet main body 10 and protrudes toward the wall surface W side. By bringing the protrusion 21p into contact with the wall surface W, the projector 3 is positioned at a specified position for displaying the projection image P on the wall surface W.

[0176] In this way, the projection cabinet 2 of the present embodiment positions the projector 3 at a specified position for displaying the projection image P on the wall surface W by bringing the protrusion 21p into contact with the wall surface W.

[0177] Therefore, the reliability of the alignment accuracy can be improved.

[0178] In addition, in the projection cabinet 2 of the present embodiment, the lower assembly 20 as a setting portion has a pedestal 21 for mounting the projector 3, and the protrusion 21p as a protruding portion is a part of the pedestal 21. In addition, the protruding portion exemplified by the protrusion 21p is not limited to being configured as a part of the pedestal 21. For example, it may be configured such that resin, rubber, etc. are provided at the end of a protrusion extending from the pedestal 21. That is, the protruding portion may also be configured to include a protrusion and resin, rubber, etc.

[0179] In this way, the protrusion 21p is a part of the pedestal 21. In other words, the only component disposed between the wall surface W as a projection surface and the projector 3 is the pedestal 21.

[0180] Therefore, the possibility of manufacturing deviations and assembly errors can be reduced. Also, the possibility of wobbling due to use and the passage of time can be suppressed.

[0181] In addition, in the projection cabinet 2 of the present embodiment, the pedestal 21 has a through hole 21a as a second opening disposed at a position corresponding to the suction port provided in the projector 3, and the cabinet main body 10 as a housing has a cutout 33 as a third opening disposed at a position corresponding to the exhaust port 3e, and the exhaust port 3e is provided on a side surface of the projector 3 that intersects the bottom surface.

[0182] In this way, the projection cabinet 2 of the present embodiment has an opening at a position corresponding to the intake and exhaust ports of the projector 3.

[0183] Therefore, the projection cabinet 2 can maintain the intake and exhaust of the accommodated projector 3 well, and can make the projector 3 operate stably.

[0184] In addition, the projection cabinet 2 of the present embodiment further includes a handle 29, which is composed of a first hole 29a provided in the cabinet main body 10 serving as a housing and a second hole 29b provided in the pedestal 21 and communicating with the first hole 29a via a storage space 20s serving as a space inside the cabinet main body 10.

[0185] In this way, the projection cabinet 2 has a handle 29 composed of the first hole 29a and the second hole 29b. Therefore, the projection cabinet 2 can be easily carried.

[0186] In addition, in the projection cabinet 2 of the present embodiment, the pedestal 21 has a fixing portion 21c for fixing the projector 3.

[0187] Therefore, it is possible to suppress the deviation of the installation position of the projector 3 due to the carrying of the projection cabinet 2 or the like.

[0188] In addition, in the projection cabinet 2 of the present embodiment, an operation panel 4 is provided. The operation panel 4 is arranged on the cabinet main body 10 serving as a housing and has a plurality of operation buttons 41, 42, 42b, 43, 44, 45 as operation members. The number of types of functions operated by the plurality of operation buttons 41, 42, 42b, 43, 44, 45 is one or more and five or less.

[0189] Therefore, the user can operate the operation panel 4 simply and intuitively.

[0190] In addition, in the projection cabinet 2 of the present embodiment, the number of types of functions operated by each of the operation buttons 41, 42, 42b, 43, 44, 45 as operation members is one.

[0191] In this way, by setting the number of types of functions assigned to each of the operation buttons 41, 42a, 42b, 43, 44, 45 to one, the operation panel 4 can be made into a simple structure.

[0192] The projection system 1 of the present embodiment includes: a projector 3 that emits projection light Lp as light to be projected as a projection image P onto a wall surface W as a projection surface; and a projection cabinet 2 that houses the projector 3. The projection cabinet 2 has: a cabinet main body 10 as a housing, which has an opening 31 as a first opening through which the projection light Lp passes; a lower assembly 20 as a setting portion, which is disposed in the cabinet main body 10 and the projector 3 is disposed on the lower assembly 20; and a protrusion 21p as a protruding portion, which is disposed in the cabinet main body 10 and protrudes toward the wall surface W side. By bringing the protrusion 21p into contact with the wall surface W, the projector 3 is positioned at a specified position for displaying the projection image P on the wall surface W.

[0193] In this way, in the projection system 1 of the present embodiment, by bringing the protrusion 21p into contact with the wall surface W, the projector 3 is positioned at a specified position for displaying the projection image P on the wall surface W.

[0194] Therefore, the reliability of the alignment accuracy can be improved.

[0195] In addition, in the projection system 1 of the present embodiment, in a state where the projector 3 is positioned at a specified position, the size of the projection image P on the wall surface W is 80 inches or more and 126 inches or less, the projection ratio of the projection system 1 is 0.16 or more and 0.29 or less, the height from the ground FL where the projection cabinet 2 is installed to the upper surface of the lower assembly 20 or the pedestal 21 as the installation surface for installing the projector 3 is 340 mm or more and 640 mm or less, the height from the ground FL to the lower end of the projection image P is 750 mm or more and 950 mm or less, and the length from the end face 21f of the protrusion 21p as the protruding portion in contact with the wall surface W to the back surface 3b of the surface on the wall surface W side of the projector 3 is 20 mm or more and 200 mm or less.

[0196] In this way, when the size of the projection image P is 80 inches or more and 126 inches or less and the projection ratio is 0.16 or more and 0.29 or less, by converging each dimension within a specified range, the projection system 1 of the present embodiment can easily display a high-quality rectangular projection image P with suppressed deformation and image quality deterioration on the wall surface W without performing fine adjustments.

[0197] In addition, in the projection system 1 of the present embodiment, in a state where the projector 3 is positioned at a predetermined position, the size of the projection image P on the wall surface W is 80 inches or more and 126 inches or less, the projection ratio of the projection system 1 is 0.27 or more and 0.44 or less, the height from the ground FL provided with the projection cabinet 2 to the upper surface of the lower component 20 or the pedestal 21 which is the installation surface for installing the projector 3 is 230 mm or more and 570 mm or less, the height from the ground FL to the lower end of the projection image P is 750 mm or more and 950 mm or less, and the length from the end surface 21f of the protrusion 21p which is the protrusion in contact with the wall surface W to the back surface 3b which is the surface on the wall surface W side of the projector 3 is 160 mm or more and 470 mm or less.

[0198] Thus, when the size of the projection image P is 80 inches or more and 126 inches or less and the projection ratio is 0.27 or more and 0.44 or less, by converging each dimension within a specified range, the projection system 1 of the present embodiment can easily display a high-quality rectangular projection image P with suppressed deformation and image quality deterioration on the wall surface W without requiring fine adjustment.

[0199] As described above, the present invention has been described based on preferred embodiments, but the present invention is not limited to the above embodiments. In addition, the structure of each part of the present invention can be replaced with any structure that exhibits the same function as the above embodiments, and any structure can be added.

[0200] Summary of the present disclosure

[0201] Hereinafter, a summary of the present disclosure is noted.

[0202] Note 1

[0203] A projection cabinet includes: a housing that houses a projector which emits light as a projection image projected onto a projection surface, the housing having a first opening through which the light passes; a setting portion disposed in the housing, the projector being provided on the setting portion; and a protruding portion disposed in the housing and protruding toward the projection surface side. By bringing the protruding portion into contact with the projection surface, the projector is positioned at a predetermined position for displaying the projection image on the projection surface.

[0204] Thereby, the reliability of the alignment accuracy can be improved.

[0205] Note 2

[0206] According to the projection cabinet described in Note 1, the setting portion has a pedestal on which the projector is placed, and the protruding portion is a part of the pedestal.

[0207] Thus, the possibility of manufacturing deviations and assembly errors can be reduced. Also, the possibility of wobbling due to use or the passage of time can be suppressed.

[0208] Supplementary Note 3

[0209] The projection cabinet according to Supplementary Note 2, wherein the pedestal has a second opening disposed at a position corresponding to the suction port provided in the projector, the housing has a third opening disposed at a position corresponding to the exhaust port, and the exhaust port is provided on a side surface of the projector that intersects the bottom surface.

[0210] Thus, the intake and exhaust of the housed projector can be maintained well, and the projector can operate stably.

[0211] Supplementary Note 4

[0212] The projection cabinet according to Supplementary Note 2 or 3, wherein the projection cabinet includes a handle, and the handle is constituted by a first hole provided in the housing and a second hole provided in the pedestal and communicating with the first hole through the space inside the housing.

[0213] Thus, the projection cabinet can be easily carried.

[0214] Supplementary Note 5

[0215] The projection cabinet according to any one of Supplementary Notes 2 - 3, wherein the pedestal has a fixing portion for fixing the projector.

[0216] Thus, the displacement of the installation position of the projector due to the carrying of the projection cabinet or the like can be suppressed.

[0217] Supplementary Note 6

[0218] The projection cabinet according to any one of Supplementary Notes 1 - 5, wherein the projection cabinet includes an operation panel, the operation panel is disposed on the housing, has a plurality of operation members, and the number of types of functions operated by the plurality of operation members is one or more and five or less.

[0219] Thus, the user can operate the operation panel simply and intuitively.

[0220] Supplementary Note 7

[0221] The projection cabinet according to Supplementary Note 6, wherein the number of types of functions operated by each of the plurality of operation members is one.

[0222] Thus, the operation panel can be made into a simple structure.

[0223] Supplementary Note 8

[0224] A projection system includes: a projector that emits light as a projection image projected onto a projection surface; and a projection cabinet that houses the projector. The projection cabinet has: a housing having a first opening through which the light passes; a setting portion disposed in the housing, where the projector is disposed; and a protruding portion disposed in the housing and protruding toward the projection surface side. By bringing the protruding portion into contact with the projection surface, the projector is positioned at a specified position for displaying the projection image on the projection surface.

[0225] Thereby, the reliability of the alignment accuracy can be improved.

[0226] Supplementary Note 9

[0227] In the projection system according to Supplementary Note 8, when the projector is positioned at the specified position, the size of the projection image on the projection surface is 80 inches or more and 126 inches or less, the projection ratio of the projection system is 0.16 or more and 0.29 or less, the height from the ground where the projection cabinet is installed to the setting surface where the projector is installed is 340 mm or more and 640 mm or less, the height from the ground to the lower end of the projection image is 750 mm or more and 950 mm or less, and the length from the end surface of the protruding portion in contact with the projection surface to the surface of the projector on the projection surface side is 20 mm or more and 200 mm or less.

[0228] Thereby, without making fine adjustments, it is possible to easily display a high-quality rectangular projection image P with reduced distortion and image quality degradation on the wall surface W.

[0229] Supplementary Note 10

[0230] In the projection system according to Supplementary Note 8, when the projector is positioned at the specified position, the size of the projection image on the projection surface is 80 inches or more and 126 inches or less, the projection ratio of the projection system is 0.27 or more and 0.44 or less, the height from the ground where the projection cabinet is installed to the setting surface where the projector is installed is 230 mm or more and 570 mm or less, the height from the ground to the lower end of the projection image is 750 mm or more and 950 mm or less, and the length from the end surface of the protruding portion in contact with the projection surface to the surface of the projector on the projection surface side is 160 mm or more and 470 mm or less.

[0231] Thereby, without making fine adjustments, it is possible to easily display a high-quality rectangular projection image P with reduced distortion and image quality degradation on the wall surface W.

Claims

1. A projection cabinet, comprising: a housing that accommodates a projector that emits light as a projection image to be projected onto a projection surface, the housing having a first opening through which the light passes; A setting part, which is configured on the housing, and the projector is set on the setting part; as well as a protrusion, which is arranged on the housing and protrudes toward the projection surface. By causing the protruding portion to come into contact with the projection surface, the projector is positioned at a predetermined position where the projection image is displayed on the projection surface.

2. The projection cabinet according to claim 1, wherein: The installation part has a stand for placing the projector. The protrusion is part of the seat.

3. The projection cabinet according to claim 2, wherein: The pedestal has a second opening disposed at a position corresponding to an air intake port provided in the projector. The housing has a third opening disposed at a position corresponding to an exhaust port provided on a side surface intersecting with a bottom surface of the projector.

4. The projection cabinet according to claim 2, wherein: The projection cabinet includes a handle, and the handle is composed of a first hole provided in the housing and a second hole provided in the pedestal and communicating with the first hole via a space in the housing.

5. The projection cabinet according to claim 2, wherein: The pedestal has a fixing portion for fixing the projector.

6. The projection cabinet according to claim 1, wherein: The projection cabinet includes an operation panel, which is arranged on the housing and has a plurality of operation elements. The types of functions operated by the plurality of operating elements are one or more and five or less.

7. The projection cabinet according to claim 6, wherein: The type of function operated by each of the plurality of operating elements is one type.

8. A projection system comprising: a projector that emits light as a projected image onto a projection surface; and A projection cabinet, which accommodates the projector, The projection cabinet has: a housing having a first opening for the light to pass through; A setting part, which is configured on the housing, and the projector is set on the setting part; as well as a protrusion, which is arranged on the housing and protrudes toward the projection surface. By causing the protruding portion to come into contact with the projection surface, the projector is positioned at a predetermined position where the projection image is displayed on the projection surface.

9. The projection system according to claim 8, wherein: In a state where the projector is positioned at the prescribed position, The size of the projected image on the projection surface is greater than or equal to 80 inches and less than or equal to 126 inches, The projection ratio of the projection system is greater than or equal to 0.16 and less than or equal to 0.29, The height from the ground where the projection cabinet is installed to the installation surface where the projector is installed is 340 mm or more and 640 mm or less. The height from the ground to the lower end of the projected image is greater than or equal to 750 mm and less than or equal to 950 mm. A length from an end surface of the protruding portion that contacts the projection surface to a surface of the projector on the projection surface side is greater than or equal to 20 mm and less than or equal to 200 mm.

10. The projection system according to claim 8, wherein: In a state where the projector is positioned at the prescribed position, The size of the projected image on the projection surface is greater than or equal to 80 inches and less than or equal to 126 inches, The projection ratio of the projection system is greater than 0.27 and less than 0.44, The height from the ground where the projection cabinet is installed to the installation surface where the projector is installed is 230 mm or more and 570 mm or less. The height from the ground to the lower end of the projected image is greater than or equal to 750 mm and less than or equal to 950 mm. A length from an end surface of the protruding portion that contacts the projection surface to a surface of the projector on the projection surface side is greater than or equal to 160 mm and less than or equal to 470 mm.

Images