Projector with stand

Abstract

To spread sound emitted from a speaker of a projector with a stand.SOLUTION: A projector 1 with a stand includes a projector 10 having a projection port 12, a speaker 15 disposed on the projector 10, and a stand 20 that supports the projector 10. The stand 20 has an acoustic diffusion unit 30 on the surface facing the projector 10 that reflects and diffuses sound emitted from the speaker 15.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a projector with a stand. [Background technology]

[0002] Conventionally, projectors with stands equipped with a rotatable stand that changes the tilt angle of the projector have been used to allow the position at which an image is projected to be freely set. For example, the projector device disclosed in Patent Document 1 includes a support device as a stand that rotatably supports the projector body. The support device includes a mounting case for mounting the projector body and a support base that rotatably supports the mounting case around a horizontal rotation axis.

[0003] Furthermore, projectors with built-in speakers have been used for some time, allowing for the projection of images with sound. When a speaker is built into a small, portable projector, the speaker is sometimes placed at the rear end of the projector, opposite the projection lens, due to layout constraints within the projector. In this case, a sound outlet is provided on the back of the projector, and sound is emitted backward. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-10391 Summary of the Invention [Problem to be solved by the invention]

[0005] When watching movies using a projector with a stand, the projector may be pointed upward to project images onto the ceiling. If the projector has sound vents on the back, pointing the projector upward will cause the sound vents to face downward and face the stand, blocking the sound.

[0006] Of the sounds emitted from speakers, low-frequency sounds tend to spread in all directions, so they are likely to spread to the surrounding area even if the stand is directly in front of the sound outlet. On the other hand, high-frequency sounds are highly directional, so they are less likely to spread to the surrounding area when the stand is directly in front of the sound outlet. Therefore, if the sound outlet is positioned facing the stand, high-frequency sounds will not spread to the surrounding area, reducing the sense of realism. [Means for solving the problem]

[0007] In order to solve the above problems, the projector with a stand of the present invention comprises a projector having a projection port, a speaker placed on the projector, and a stand that supports the projector, and is characterized in that the stand has an acoustic diffusion section on the surface facing the projector that reflects and diffuses sound emitted from the speaker.

[0008] In order to solve the above problems, the stand-equipped projector of the present invention comprises a projector having a projection port, a stand that supports the projector, and a speaker that is placed on the stand, and is characterized in that the projector has an acoustic diffusion section on the surface facing the stand that reflects and diffuses sound emitted from the speaker.

[0009] In order to solve the above problems, the projector with a stand of the present invention comprises a projector having a projection port, a speaker arranged on the projector, and a stand supporting the projector, wherein the stand is characterized by having a sound receiving port facing the surface facing the projector, a sound output port opening on a surface different from the surface facing the projector, and an acoustic transmission path connecting the sound receiving port and the sound output port. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a side view of a stand-equipped projector according to a first embodiment. [Figure 2] FIG. 1 is a front view of a stand-equipped projector according to a first embodiment. [Figure 3] FIG. 2 is an explanatory diagram of an acoustic diffusion unit. [Figure 4] FIG. 10 is an explanatory diagram showing an acoustic diffusion unit of Modification 1. [Figure 5] FIG. 10 is an explanatory diagram showing an acoustic diffusion unit of Modification 2. [Figure 6] FIG. 10 is an explanatory diagram showing an acoustic diffusion unit of Modification 3. [Figure 7] FIG. 10 is a side view of a stand-equipped projector according to a second embodiment. [Figure 8] FIG. 11 is a side view of a stand-equipped projector according to a third embodiment. [Figure 9] FIG. 10 is an explanatory diagram showing an acoustic diffusion unit of a fourth modified example. [Figure 10] FIG. 10 is a side view of a stand-equipped projector according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A stand-equipped projector according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0012] (Embodiment 1) FIG. 1 is a side view of the stand-equipped projector 1 of embodiment 1. FIG. 2 is a front view of the stand-equipped projector 1 of embodiment 1. In this specification, the X direction, Y direction, and Z direction are directions that are perpendicular to each other. One side of the Z direction is referred to as the Z1 direction, and the other side of the Z direction is referred to as the Z2 direction. One side of the X direction is referred to as the X1 direction, and the other side of the X direction is referred to as the X2 direction. One side of the Y direction is referred to as the Y1 direction, and the other side of the Y direction is referred to as the Y2 direction.

[0013] 1 and 2 show a state in which a stand-equipped projector 1 is installed on an installation surface M facing upward, and projects projection light LL toward a wall surface. In FIGS. 1 and 2, the Z direction is the up-down direction. The Z1 direction is upward, and the Z2 direction is downward. The X direction is the front-to-back direction of the stand-equipped projector 1. The X1 direction is forward, and the X2 direction is backward. The X1 direction is the projection direction of an image. As will be described later, the stand-equipped projector 1 can adjust the projection direction of the projection light LL within a range that includes the X1 and Z2 directions. The Y direction is the width direction of the stand-equipped projector 1. The stand-equipped projector 1 can be installed and used on a surface facing in any direction.

[0014] As shown in FIGS. 1 and 2, the stand-equipped projector 1 includes a projector 10 and a stand 20. The stand 20 is a support device that rotatably supports the projector 10. The stand 20 includes a base 21 that is placed on an installation surface M, and a pair of support columns 22 that extend in the Z1 direction from the base 21. The projector 10 is placed between the pair of support columns 22, and is rotatably connected to a rotation support section 23 that is provided at the tip of each support column 22. This allows the projector 10 to be supported rotatably around a rotation axis L that extends in the Y direction. The rotation support section 23 includes, for example, a shaft section that is provided on one of the projector 10 and the support column 22, and a bearing section that is provided on the other of the projector 10 and the support column 22 and rotatably supports the shaft section.

[0015] As shown in FIG. 1, the projector 10 includes an exterior case 11 and a projection optical system 13 disposed inside a projection port 12 provided in the exterior case 11. The projector 10 emits projection light LL to the outside from the projection port 12. The projector 10 also includes a light source, an image generation unit, and a control unit (not shown) housed in the exterior case 11, and a speaker 15 disposed inside a sound emission port 14 provided in the exterior case 11. Note that the projector 10 may be configured such that a portion of the lens frame or barrel of the projection optical system 13 protrudes to the outside from the projection port 12.

[0016] The control unit operates the image generation unit based on an image signal such as a video signal from an external device, and also supplies an audio signal linked to the image signal to the speaker 15 to operate the speaker 15. The image generation unit is, for example, a liquid crystal panel. The projector 10 enlarges and projects the image generated by the image generation unit using the projection optical system 13.

[0017] In the example shown in FIGS. 1 and 2, the exterior case 11 has a rectangular parallelepiped shape. The exterior case 11 has a front surface 16 on which the projection port 12 is provided, and a back surface 17 facing the opposite side from the front surface 16. A sound outlet 14 is provided on the back surface 17. The sound outlet 14 may be a single opening or a perforated plate with multiple holes. The projector 10 emits sound generated by the speaker 15 to the outside through the sound outlet 14. In the example shown in FIGS. 1 and 2, the sound outlet 14 and the speaker 15 are located at the end of the projection side of the projector 10, in other words, at the end opposite the end on which the projection port 12 is provided. Therefore, the sound emitted from the speaker 15 is emitted in the direction opposite to the projection light LL.

[0018] The rotation range of the projector 10 is a range that includes at least a first rotation position R1 (see FIGS. 1 and 2) where the projection port 12 faces the X1 direction, and a second rotation position R2 (see FIG. 3) where the projection port 12 faces the Z1 direction. At the first rotation position R1, the projector 10 can project an image onto a wall surface. At the second rotation position R2, the projector 10 can project an image onto a ceiling surface. At the second rotation position R2, the speaker 15 faces the Z2 direction. Therefore, at the second rotation position R2, the speaker 15 faces the stand 20.

[0019] The projector 10 is supported so that it can rotate 90° in the Z2 direction from the reference position (first rotation position R1) and 120° in the Z1 direction from the reference position (first rotation position R1), for example, with the first rotation position R1 as the reference position. Note that the rotation range of the projector 10 is not limited to this range. For example, the projector 10 may be rotatable 360°. The stand 20 includes a holding mechanism that holds the projector 10 at any rotation position or at a plurality of preset rotation positions.

[0020] (acoustic diffusion section) The stand 20 has an acoustic diffuser 30 on its surface facing the projector 10 that reflects and diffuses sound emitted from the speaker 15. As shown in FIGS. 1 and 2, the projector 10 is held in a position facing the base 21 of the stand 20. Therefore, the upper surface of the base 21 is the surface facing the projector 10, and the acoustic diffuser 30 is provided on the upper surface of the base 21. In the example shown in FIGS. 1 and 2, the entire upper surface of the base 21 constitutes the acoustic diffuser 30. Note that the acoustic diffuser 30 may be provided only on a portion of the upper surface of the base 21. For example, the acoustic diffuser 30 may be provided only in a range that faces the projector 10 when it is rotated to the second rotation position R2.

[0021] 3 is an explanatory diagram of the acoustic diffuser 30. In FIG. 3, the pair of support columns 22 and the rotation support 23 provided on the stand 20 are not shown. When the projector 10 is rotated to the second rotation position R2, the sound outlet 14 faces the upper surface of the base 21, as shown in FIG. 3. Therefore, the speaker 15 faces the acoustic diffuser 30 via the sound outlet 14. The sound emitted from the speaker 15 travels from the sound outlet 14 toward the acoustic diffuser 30, where it is reflected and diffused.

[0022] The sound diffusing unit 30 has a convex shape that protrudes toward the projector 10. As shown in Fig. 3, the sound diffusing unit 30 is made up of a single convex portion 31 having one vertex P1. When the projector 10 is rotated to the second rotation position R2, the vertex P1 of the convex portion 31 faces the center of the sound outlet 14.

[0023] In FIG. 3 , the spread of sound emitted from speaker 15 is indicated by a dashed-dotted line S0, and the spread of reflected sound reflected by sound diffuser 30 is indicated by a dashed-dotted line S1. The surface of sound diffuser 30 is a convex curved surface. The convex curved surface is composed of surfaces facing the outer periphery except for vertex P. Therefore, the reflected sound reflected by sound diffuser 30 spreads toward the outer periphery. Furthermore, the slope of the tangent to the convex curved surface decreases as it approaches vertex P and increases toward the outer periphery. Therefore, the sound reflected at the outer periphery of sound diffuser 30 has a greater slope in the Z direction than the sound reflected at the inner periphery. Therefore, the reflected sound reflected by sound diffuser 30 spreads widely toward the outer periphery and is diffused over a wide area.

[0024] (Effects of the first embodiment) The stand-equipped projector 1 of the first embodiment includes a projector 10 having a projection port 12, a speaker 15 disposed on the projector 10, and a stand 20 that supports the projector 10. The stand 20 is provided with an acoustic diffusion unit 30 on the surface facing the projector 10 that reflects and diffuses sound emitted from the speaker 15.

[0025] As a result, even when sound is emitted from the speaker 15 toward the stand 20, the sound is reflected and diffused by the acoustic diffusion unit 30. This prevents a decrease in acoustic effect due to the sound emitted from the speaker 15 being blocked by the stand 20. In particular, even high-pitched sounds can be spread to the surroundings by the acoustic diffusion unit 30. This prevents a decrease in the sense of realism provided by video with audio.

[0026] The acoustic diffusion unit 30 has a convex shape that protrudes toward the projector 10. Therefore, sound is reflected by the surface facing the outer periphery, and the reflected sound travels toward the outer periphery. This allows the sound to be spread around. In addition, the surface of the acoustic diffusion unit 30 is a convex curved surface. This allows the reflected sound to be spread over a wide area.

[0027] The stand 20 of the first embodiment rotatably supports the projector 10. The rotation range of the projector 10 includes a second rotation position R2 where the speaker 15 and the acoustic diffuser 30 face each other. This allows the projection direction of the projection light LL to be adjusted. Furthermore, when the projection direction is changed so that sound is emitted from the speaker 15 toward the stand 20, the sound is reflected and diffused by the acoustic diffuser 30. Therefore, even high-pitched sounds can be spread to the surroundings by the acoustic diffuser 30, and a decrease in the sense of realism obtained from video with sound can be suppressed.

[0028] (Modification of the acoustic diffusion section) The acoustic diffusion unit 30 is not limited to the shape shown in Fig. 3 as long as it has a shape in which the portion that reflects the sound of the speaker 15 faces the outer periphery, in other words, a convex shape that protrudes toward the projector 10. For example, the shapes of the following modified examples 1 to 3 can be adopted.

[0029] FIG. 4 is an explanatory diagram showing an acoustic diffuser 30A of Modification 1. As in the first embodiment, the acoustic diffuser 30A is composed of a single convex portion 32 that protrudes toward the projector 10. The surface of the acoustic diffuser 30A has a central region 321 centered on the apex of the convex portion 32, and an outer circumferential region 322 that surrounds the central region 321. On the surface of the acoustic diffuser 30A, the central region 321 is a convex curved surface, and the outer circumferential region 322 is a concave curved surface. The central region 321 has a shape in which the slope of the tangent increases toward the outer periphery. The outer circumferential region 322 has a shape in which the slope of the tangent decreases toward the outer periphery, approaching zero.

[0030] The surface of the acoustic diffuser 30A is the same as in the first embodiment in that, although the outer peripheral region 322 is a concave curved surface, the surface faces the outer periphery except for the apex of the central region 321. Therefore, reflected sound can be diffused to the surroundings, and even high-pitched sounds can be spread to the surroundings.

[0031] FIG. 5 is an explanatory diagram showing an acoustic diffuser 30B of Modification 2. FIG. 6 is an explanatory diagram showing an acoustic diffuser 30C of Modification 3. A plurality of convex portions 33 are arranged on the surfaces of the acoustic diffusers 30B and 30C. The surface of each convex portion 33 is a convexly curved surface. Both acoustic diffusers 30B and 30C have a shape in which a plurality of convex portions 33 are arranged on a single convex surface that is highest in the center. In the acoustic diffuser 30B shown in FIG. 5, a plurality of convex portions 33 are arranged on a curved surface. On the other hand, the acoustic diffuser 30C shown in FIG. 6 is taller at the center than the acoustic diffuser 30B. In the acoustic diffuser 30C, a plurality of convex portions 33 are arranged on a conical surface.

[0032] The acoustic diffusers 30B and 30C have multiple protrusions 33 arranged on their surfaces, which improves the sound diffusion effect. That is, not only the sound reflected at the outer periphery but also the sound reflected at the inner periphery can be spread around. Furthermore, the shape of each protrusion 33 of the acoustic diffusers 30B and 30C is set so that the sound reflected from the surface of each protrusion 33 is directed in a direction that prevents it from colliding with the surface of an adjacent protrusion 33. Therefore, it is possible to prevent a decrease in the sound directed toward the outer periphery due to repeated reflection of sound between adjacent protrusions 33.

[0033] In the examples shown in FIGS. 5 and 6, the multiple protrusions 33 arranged on the surfaces of the acoustic diffusers 30B and 30C all have the same shape, but the multiple protrusions 33 may have different sizes and shapes.

[0034] Furthermore, the protrusion 31 of the first embodiment and the protrusions 32 and 33 of the first to third modifications may have a pointed convex shape. For example, they may have a conical or pyramidal shape. Alternatively, they may have a conical or pyramidal shape with the tip cut off by a flat surface.

[0035] (Other variations) The external shape of the projector 10 is not limited to a rectangular parallelepiped as shown in Figures 1 and 2. For example, it may be a cylindrical shape, or may be another shape such as a spherical shape.

[0036] The surface on which the sound outlet 14 is provided does not have to be the rear surface 17 of the projector 10. The surface on which the sound outlet 14 is provided may be any surface that faces the stand 20 at any rotation position within the rotation range of the projector 10. For example, the sound outlet 14 may be provided on a side surface of the projector 10 facing the Z1 direction or the Z2 direction in FIG. 1 .

[0037] A configuration may be adopted in which the projector 10 is fixed to the stand 20 and is not rotatable. In this case, the sound outlet 14 is provided on the surface of the fixed projector 10 facing the stand 20, and the speaker 15 is arranged inside the sound outlet 14.

[0038] (Embodiment 2) 7 is a side view of a stand-equipped projector 1D of embodiment 2. The stand-equipped projector 1D includes a projector 10D and a stand 20D. The stand-equipped projector 1D is configured in the same manner as embodiment 1, except that the arrangement of the acoustic diffusion unit and speakers is different from embodiment 1, and the projector 10D is not rotatable.

[0039] Projector 10D includes an exterior case 11D, a projection optical system 13 arranged inside a projection port 12 provided in exterior case 11D, and a light source, an image generation unit, and a control unit (not shown) housed in exterior case 11D. Projector 10D emits projection light LL from projection port 12 to the outside.

[0040] The stand 20D includes a base 21D placed on the installation surface M and a pair of support columns extending in the Z1 direction from the base 21D. The projector 10D is disposed between the pair of support columns and is held in a position facing the upper surface of the base 21D by the pair of support columns. The projector 10D is fixed to the stand 20D in an orientation in which the projection port 12 faces the X1 direction. Note that the pair of support columns are not shown in FIG. 7.

[0041] The stand-attached projector 1D includes a speaker 26 arranged on the stand 20D. The stand 20D has a sound outlet 27 on the surface facing the projector 10D, and the speaker 26 is arranged inside the sound outlet 27. The stand-attached projector 1D emits sound generated by the speaker 26 from the sound outlet 27 towards the projector 10D. In the example shown in Fig. 7, the sound outlet 27 is arranged on the top surface of the base 21D, and emits sound in the Z1 direction.

[0042] Projector 10D is provided with an acoustic diffusion unit 30D that reflects and diffuses sound emitted from speaker 26 on the surface facing stand 20D. In the example shown in FIG. 7, projector 10D has exterior case 11D with side surface 18 facing the Z2 direction facing stand 20D. In projector 10D, the entire side surface 18 facing the Z2 direction constitutes acoustic diffusion unit 30D. Speaker 26 faces acoustic diffusion unit 30D via sound emission port 27.

[0043] 7, projector 10D is fixed to stand 20D in a position where projection port 12 faces in the X1 direction, but the orientation of projection port 12 is not limited to this. For example, projector 10D may be fixed in a position where projection port 12 faces in the Z1 direction. In this case, the surface facing stand 20D is rear surface 17, and acoustic diffusion unit 30D is provided on rear surface 17.

[0044] The sound diffusing unit 30D is configured in the same manner as the sound diffusing unit 30 of the first embodiment. That is, the sound diffusing unit 30D has a convex shape that protrudes toward the base 21D. The sound diffusing unit 30D is composed of a single convex portion 34 that protrudes toward the base 21D. As shown in FIG. 7 , the apex P4 of the convex portion 34 faces the center of the sound outlet 27. The surface of the sound diffusing unit 30 is a convex curved surface.

[0045] (Effects of the second embodiment) The stand-equipped projector 1D of the second embodiment has a projector 10D having a projection port 12, a stand 20D that supports the projector 10D, and a speaker 26 that is arranged on the stand 20D. The projector 10D has an acoustic diffusion unit 30D on the surface facing the stand 20D that reflects and diffuses sound emitted from the speaker 26.

[0046] As a result, sound emitted from speaker 26 toward projector 10D is reflected and diffused by acoustic diffusion unit 30D. This makes it possible to prevent a decrease in acoustic effect due to the sound emitted from speaker 26 being blocked by projector 10D. In particular, even high-pitched sounds can be spread to the surroundings by acoustic diffusion unit 30D. This makes it possible to prevent a decrease in the sense of realism obtained from video with audio.

[0047] The acoustic diffuser 30D has a convex shape that protrudes toward the speaker 26. Therefore, the surface facing the outer periphery reflects sound, and the reflected sound travels toward the outer periphery. This allows the sound to be spread around. In addition, the surface of the acoustic diffuser 30D is a convex curved surface. This allows the reflected sound to be diffused over a wide area.

[0048] The acoustic diffusion section 30D of the second embodiment can be configured in all of the first to third modifications of the first embodiment.

[0049] (Embodiment 3) 8 is a side view of a stand-equipped projector 1E of embodiment 3. The stand-equipped projector 1E includes a projector 10E and a stand 20E. The projector 10E is rotatably supported by the stand 20E.

[0050] The stand 20E includes a base 21E placed on an installation surface M and a pair of support columns extending in the Z1 direction from the base 21E. The projector 10E is disposed between the pair of support columns and rotatably connected to rotation support sections provided at the tips of the support columns. This allows the projector 10E to be supported rotatably about a rotation axis L extending in the Y direction. Note that the pair of support columns and the rotation support sections are not shown in FIG. 8.

[0051] The rotation range of the projector 10E is a range that includes at least a first rotation position R1 (see FIG. 8) where the projection port 12 faces the X1 direction, a second rotation position where the projection port 12 faces the Z1 direction, and a third rotation position where the projection port 12 faces the X2 direction. The stand 20E has a holding mechanism that holds the projector 10E at any rotation position or at a plurality of preset rotation positions.

[0052] The stand 20E has a sound outlet 27 on the top surface of the base 21E, similar to the stand 20D of embodiment 2. The stand-equipped projector 1E emits sound generated by a speaker 26 arranged inside the sound outlet 27 from the sound outlet 27 toward the projector 10E.

[0053] An exterior case 11E of the projector 10E has a rear surface 17 facing away from the projection port 12. The exterior case 11E also has a pair of side surfaces 18, 19 facing on both sides of a direction that intersects with the front-to-rear direction from the projection port 12 to the rear surface 17 and intersects with the rotation axis L of the projector 10E. As shown in FIG. 8 , at the first rotation position R1, the front-to-rear direction from the projection port 12 to the rear surface 17 coincides with the X direction, and of the pair of side surfaces 18, 19, the side surface 18 faces the Z2 direction and the side surface 19 faces the Z1 direction.

[0054] The projector 10E includes an acoustic diffuser 30E1 provided on the rear surface 17, and an acoustic diffuser 30E2 provided on each of the pair of side surfaces 18 and 19. In the example shown in FIG. 8, the entire rear surface 17 constitutes the acoustic diffuser 30E1. The acoustic diffuser 30E1 is made up of a single protrusion 35 that protrudes toward the outside of the exterior case 11E. Similarly, the entire side surface 18 and the entire side surface 19 each constitute the acoustic diffuser 30E2. The acoustic diffuser 30E2 is made up of a single protrusion 36 that protrudes toward the outside of the exterior case 11E.

[0055] The surfaces of the sound diffusers 30E1 and 30E2 are convexly curved. At the second rotation position where the back surface 17 faces the stand 20E, the sound diffuser 30E1 protrudes toward the stand 20E, and the apex P5 of the sound diffuser 30E1 faces the center of the sound outlet 27. At the first rotation position R1 where the side surface 18 faces the stand 20E, and at the third rotation position where the side surface 19 faces the stand 20E, the sound diffuser 30E2 protrudes toward the stand 20E, and the apex P6 of the sound diffuser 30E2 faces the center of the sound outlet 27.

[0056] (Effects of the Third Embodiment) In the stand-equipped projector 1E of the third embodiment, a stand 20E rotatably supports a projector 10E. The rotation range of the projector 10E includes a rotation position where the speaker 26 and the acoustic diffusion units 30E1 and 30E2 face each other.

[0057] This makes it possible to adjust the projection direction of the projection light LL. Also, sound emitted from the speaker 26 toward the projector 10E is reflected and diffused by the acoustic diffusion units 30E1 and 30E2. This makes it possible to prevent a decrease in acoustic effect due to the sound emitted from the speaker 26 being blocked by the projector 10E. In particular, even high-pitched sounds can be diffused to the surroundings.

[0058] The stand-equipped projector 1E has a rear surface 17 facing away from the projection port 12, and a pair of side surfaces 18, 19 facing on both sides in a direction intersecting the front-to-rear direction from the projection port 12 to the rear surface 17 and intersecting the rotation axis L of the projector 10E. An acoustic diffuser 30E1 is provided on the rear surface 17, and an acoustic diffuser 30E2 is provided on the pair of side surfaces 18, 19. The stand 20E supports the projector 10E rotatably within a range that includes a first rotation position R1 where the speaker 26 faces the side surface 18, a second rotation position where the speaker 26 faces the rear surface 17, and a third rotation position where the speaker 26 faces the side surface 19.

[0059] This makes it possible to adjust the projection direction of the projection light LL over a wide range of 180° or more. Furthermore, at the first rotation position R1, the second rotation position, and the third rotation position, the sound emitted from the speaker 26 toward the projector 10E is reflected and diffused by the acoustic diffusion units 30E1 and 30E2, so that even high-pitched sounds can be spread to the surroundings.

[0060] (Variation) The acoustic diffusion units 30E1 and 30E2 of the third embodiment can be configured in all of the first to third modifications of the first embodiment.

[0061] Fig. 9 is an explanatory diagram showing an acoustic diffuser 30F of Modification 4. As shown in Fig. 9, the projector 10F of Modification 4 has a spherical outer shape. In the projector 10F, the entire surface of the exterior case 11F constitutes the acoustic diffuser 30F, and the acoustic diffuser 30F has a spherical surface.

[0062] By reflecting sound off the spherical surface, it is possible to diffuse the sound evenly. In other words, it is possible to diffuse sound evenly all around. Furthermore, regardless of the rotational position of the projector 10F, the shape of the acoustic diffusion section 30F is the same when viewed from the speaker 26 side. Therefore, it is possible to eliminate the impact on the acoustic effect that comes with adjusting the projection direction.

[0063] The acoustic diffusing section 30F may be configured to have a plurality of convex portions arranged on a spherical surface by applying the second and third modifications of the first embodiment.

[0064] (Embodiment 4) 10 is a side view of a stand-equipped projector 1G of embodiment 4. The stand-equipped projector 1G includes a projector 10G and a stand 20G that supports the projector 10G. The stand 20G has an acoustic diffusion unit 30G provided at a location facing the projector 10G. The projector 10G has the same configuration as the projector 10 of embodiment 1, and includes a sound output port 14 and a speaker 15 that face the opposite side to the projection port 12.

[0065] The stand 20G includes a base 21G and a pair of support columns extending in the Z1 direction from the base 21G. The projector 10G is connected to the tips of the pair of support columns and rotatably connected to rotation support sections provided at the tips of the support columns. This allows the projector 10G to be supported rotatably about a rotation axis L extending in the Y direction. Note that the pair of support columns and the rotation support sections are not shown in FIG. 10. The rotation range of the projector 10G includes a second rotation position R2 (see FIG. 10) where the speaker 15 faces the stand 20G.

[0066] The sound diffusion unit 30G diffuses sound through the inside of the stand 20G. The sound diffusion unit 30G includes a sound receiving port 37 facing the surface facing the projector 10G, a sound output port 38 opening on a surface other than the surface facing the projector 10G, and a sound transmission path 39 connecting the sound receiving port 37 and the sound output port 38. Sound entering the sound transmission path 39 from the sound receiving port 37 is reflected by the inner surface of the sound transmission path 39 and transmitted to the sound output port 38, where it is emitted from the sound output port 38. In the example shown in FIG. 10 , the sound receiving port 37 opens on the top surface of the stand 20G. The sound output port 38 opens on a side surface of the stand 20G. Multiple sound output ports 38 are provided. Note that the number of sound output ports 38 is not particularly limited and may be one or more. When multiple sound output ports 38 are provided, the sound transmission path 39 branches midway to connect each sound output port 38 to the sound receiving port 37.

[0067] (Effects of the fourth embodiment) In the stand-attached projector 1G of the fourth embodiment, even when sound is emitted from the projector 10G toward the stand 20G, the sound is transmitted inside the acoustic diffusion section 30G and diffused to the outside through the sound outlet 38. This makes it possible to suppress a decrease in acoustic effect caused by the sound emitted from the projector 10G being blocked by the stand 20G. In particular, it is possible to suppress a decrease in acoustic effect caused by high-frequency sounds being difficult to diffuse. This makes it possible to suppress a decrease in the sense of realism provided by video with audio.

[0068] As in the first embodiment, the external shape of the projector 10G can be various shapes such as a rectangular parallelepiped, a cylindrical shape, or a spherical shape. The surface on which the sound outlet 14 is provided is not limited to the rear surface of the projector 10G. Furthermore, the projector 10G may be configured so that the speaker 15 is fixed to the stand 20G in a position facing the stand 20G.

[0069] Summary of the Disclosure A summary of this disclosure is provided below.

[0070] (Appendix 1) a projector having a projection port; a speaker disposed in the projector; a stand for supporting the projector; The stand-equipped projector is characterized in that the stand is provided with an acoustic diffusion section on a surface facing the projector, which reflects and diffuses sound emitted from the speaker.

[0071] According to Appendix 1, the sound emitted from the speaker toward the stand is reflected and diffused by the acoustic diffusion unit, so even high-pitched sounds can be spread to the surrounding area.

[0072] (Appendix 2) The stand-attached projector described in Appendix 1, wherein the acoustic diffusion section has a convex shape that protrudes toward the projector.

[0073] Note 2: Reflected sound is directed toward the outer periphery, allowing the sound to spread farther around.

[0074] (Appendix 3) The stand-attached projector described in Appendix 2, wherein the surface of the acoustic diffusion unit is a convex curved surface.

[0075] Appendix 3 allows the reflected sound to be spread over a wide area.

[0076] (Appendix 4) The stand-equipped projector described in Appendix 1, characterized in that the surface of the acoustic diffusion unit has multiple protrusions that protrude toward the projector.

[0077] According to Appendix 4, the sound diffusion effect is improved by the multiple protrusions.

[0078] (Appendix 5) the stand rotatably supports the projector; A stand-attached projector as described in any one of Supplementary Note 1 to Supplementary Note 4, characterized in that the rotation range of the projector includes a rotation position where the speaker and the acoustic diffusion unit face each other.

[0079] According to Appendix 5, the projection direction can be adjusted. Even if the projection direction is changed so that sound is emitted from the speaker toward the stand, the sound is reflected and diffused by the acoustic diffusion unit. Therefore, even high-pitched sounds can be spread to the surrounding area by the acoustic diffusion unit.

[0080] (Appendix 6) a projector having a projection port; a stand for supporting the projector; a speaker disposed on the stand, The projector with a stand is characterized in that the projector is provided with an acoustic diffusion section on a surface facing the stand, which reflects and diffuses sound emitted from the speaker.

[0081] According to Appendix 6, the sound emitted from the speaker toward the projector is reflected and diffused by the acoustic diffusion unit. Therefore, even high-pitched sounds can be spread to the surroundings.

[0082] (Appendix 7) the stand rotatably supports the projector; 7. The stand-equipped projector described in Appendix 6, wherein the rotation range of the projector includes a rotation position where the speaker and the acoustic diffusion unit face each other.

[0083] The projection direction can be adjusted according to Appendix 7. In addition, sound emitted from the speaker toward the projector is reflected and diffused by the acoustic diffusion unit. Therefore, even high-pitched sounds can be spread to the surroundings.

[0084] (Appendix 8) the projector has a rear surface facing the opposite side to the projection port, and a pair of side surfaces facing on both sides of a direction intersecting a front-rear direction from the projection port to the rear surface and intersecting a rotation axis of the projector, the acoustic diffusion unit is provided on the rear surface and the pair of side surfaces, The projector with stand described in Appendix 6 or 7, characterized in that the stand supports the projector rotatably within a range including a first rotation position in which the speaker faces one of the pair of side surfaces, a second rotation position in which the speaker faces the back surface, and a third rotation position in which the speaker faces the other of the pair of side surfaces.

[0085] According to Appendix 8, the projection direction can be adjusted over a wide range of 180 degrees or more. Furthermore, at the first, second, and third rotation positions, sound emitted from the speaker toward the projector is reflected and diffused by the acoustic diffusion unit. Therefore, even high-pitched sounds can be spread to the surroundings.

[0086] (Appendix 9) 8. The stand-attached projector according to claim 6 or 7, wherein the projector has a spherical outer shape.

[0087] According to Appendix 9, sound can be diffused evenly. Furthermore, even if the projection direction is changed, the shape of the sound diffusion part does not change when viewed from the speaker side. Therefore, changing the projection direction does not affect the acoustic effect.

[0088] (Appendix 10) a projector having a projection port; a speaker disposed in the projector; a stand for supporting the projector; The stand is a sound receiving port that opens on a surface facing the projector; a sound outlet that opens on a surface different from the surface facing the projector; a sound transmission path that connects the sound receiving port and the sound emitting port;

[0089] According to Appendix 10, sound can be diffused by utilizing an acoustic transmission path provided inside the stand. [Explanation of symbols]

[0090] 1, 1D, 1E, 1G...Projector with stand, 10, 10D, 10E, 10F, 10G...Projector, 11, 11D, 11E...External case, 12...Projection port, 13...Projection optical system, 14...Sound outlet, 15...Speaker, 16...Front, 17...Rear, 18, 19...Side, 20, 20D, 20E, 20F, 20G...Stand, 21, 21D, 21E, 21F, 21G...Base, 22...Support, 23...Swivel support Holding portion, 26...speaker, 27...sound outlet, 30, 30A, 30B, 30C, 30D, 30E1, 30E2, 30F, 30G...acoustic diffusion portion, 31, 32, 33, 34, 35, 36...convex portion, 37...sound receiving port, 38...sound outlet, 39...acoustic transmission path, 321...central region, 322...peripheral region, L...rotation axis, LL...projected light, M...installation surface, P, P1, P4, P5, P6...vertex, R1...first rotation position, R2...second rotation position.

Claims

1. a projector having a projection port; a speaker disposed in the projector; a stand for supporting the projector; The stand-equipped projector is characterized in that the stand is provided with an acoustic diffusion section on a surface facing the projector, which reflects and diffuses sound emitted from the speaker.

2. The stand-equipped projector according to claim 1 , wherein the acoustic diffusion section has a convex shape that protrudes toward the projector.

3. 3. The stand-equipped projector according to claim 2, wherein the surface of the acoustic diffusion section is a convex curved surface.

4. The stand-equipped projector according to claim 1 , wherein a plurality of protrusions that protrude toward the projector are arranged on the surface of the acoustic diffusion section.

5. the stand rotatably supports the projector; 5. The stand-attached projector according to claim 1, wherein the rotation range of the projector includes a rotation position where the speaker and the acoustic diffusion unit face each other.

6. a projector having a projection port; a stand for supporting the projector; a speaker disposed on the stand, The projector with a stand is characterized in that the projector is provided with an acoustic diffusion section on a surface facing the stand, which reflects and diffuses sound emitted from the speaker.

7. the stand rotatably supports the projector; The stand-equipped projector according to claim 6 , wherein the rotation range of the projector includes a rotation position where the speaker and the acoustic diffusion unit face each other.

8. the projector has a rear surface facing the opposite side to the projection port, and a pair of side surfaces facing on both sides of a direction intersecting a front-rear direction from the projection port to the rear surface and intersecting a rotation axis of the projector, the acoustic diffusion unit is provided on the rear surface and the pair of side surfaces, A projector with a stand as described in claim 6 or 7, characterized in that the stand supports the projector rotatably within a range including a first rotation position in which the speaker faces one of the pair of side surfaces, a second rotation position in which the speaker faces the rear surface, and a third rotation position in which the speaker faces the other of the pair of side surfaces.

9. 8. The stand-equipped projector according to claim 6, wherein the projector has a spherical outer shape.

10. a projector having a projection port; a speaker disposed in the projector; a stand for supporting the projector; The stand is a sound receiving port that opens on a surface facing the projector; a sound outlet that opens on a surface different from the surface facing the projector; a sound transmission path that connects the sound receiving port and the sound emitting port;

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