TWI812957B - Projection apparatus - Google Patents

Abstract

A projection apparatus adapted to provide a plurality of projection modes is provided. The projection apparatus includes a housing module and a projection module. The housing module includes a display wall and a plurality of protection walls. The display wall includes a display curved surface. The projection module includes an optical engine component and a light guide component. In a first projection mode, the optical engine component projects an image beam to the light guide component along a first axis. The light guide component projects the image beam to the display curved surface along a second axis, wherein the first axis and the second axis are not parallel to each other. In a second projection mode, the light guide component is moved out of a transmitted path of the image beam, so that the image beam is directly projected out of the projection apparatus.

Description

projection device

The present invention relates to an optical device, and in particular to a projection device.

Existing projection technology uses front projection or rear projection to project image beams to a projection screen at a certain distance from the projector, so that users can view the image information projected on the projection screen. However, the above usage requires a large installation space. If you only want to display images in a small area, or you want to rely on the projector for partial indoor layout, the traditional projector type is not suitable. Therefore, there are also other technologies for developing projection images directly on the appearance parts: using a haze sphere to incident the projection beam onto the appearance parts, and displaying the image on the sphere using the principle of back projection. According to this, the entire device only needs to be placed in the space that needs to be displayed, and it can display various images as a sphere to attract the user's attention while occupying a very small space.

However, although the above-mentioned spherical projection method can solve the space problem, it only has a spherical projection function and lacks the function of traditional projectors for projecting to a large screen. For users, purchasing a special device for this single spherical projection function is bound to be used infrequently and is not cost effective.

The present invention provides a projection device that can provide multiple projection modes.

An embodiment of the present invention provides a projection device suitable for providing multiple projection modes. The projection device includes a housing module and a projection module. The housing module includes a display wall and a plurality of protective walls, wherein the display wall and the plurality of protective walls surround an accommodation space. The display wall includes a display surface. The projection module is disposed in the accommodation space and includes an optical machine component and a light guide component, wherein the light guide component is movably disposed on one of a plurality of protective walls. In a first projection mode, the optomechanical component projects an image beam along a first axis to the light guide component. The light guide component projects the image beam to the display curved surface along a second axis, where the first axis and the second axis are not parallel to each other. In a second projection mode, the light guide component is moved out of the transmission path of the image beam, so that the image beam projected by the optomechanical component along the first axis is directly projected out of the projection device.

In an embodiment of the present invention, the above-mentioned first axis and the plurality of protective walls are not perpendicular to each other. The second axis and the plurality of protective walls are not perpendicular to each other.

In an embodiment of the present invention, the above-mentioned display curved surface is a complete sphere or a part of a sphere.

In an embodiment of the present invention, the above-mentioned display wall further includes a top cover. The upper cover is connected between the display curved surface and a plurality of protective walls. The material of the upper cover includes high reflectivity material.

In an embodiment of the present invention, an included angle between the above-mentioned upper cover and one of the plurality of protective walls on which the light guide assembly is provided is in a range of 60 degrees to 80 degrees.

In an embodiment of the present invention, the above-mentioned light guide component further includes a reflecting mirror having a reflecting surface. The angle between the reflective surface and the upper cover is in the range of 50 degrees to 70 degrees.

In an embodiment of the present invention, the above-mentioned display curved surface includes a transparent substrate and a diffusion layer stacked on each other. The haze of the diffusion layer falls in the range of 60% to 80%.

In an embodiment of the present invention, the above-mentioned display curved surface includes a transparent substrate mixed with a plurality of diffusion particles. The particle diameter of the plurality of diffusing particles falls within the range of 3 microns to 20 microns.

In an embodiment of the present invention, the above-mentioned display wall is a detachable or movable part. In a third projection mode, the display wall is moved out of the transmission path of the image beam, so that the optomechanical component projects the image beam to the light guide component along the first axis. The image beam is then directly projected out of the projection device along the second axis through the light guide component.

In an embodiment of the present invention, the plurality of protective walls further include outer side walls. The outer side wall is slidably sleeved on at least one of the protective walls of the plurality of side walls. The light guide component is arranged on the outer wall. By sliding the outer wall relative to the plurality of protective walls, the light guide component is moved out of or into the transmission path of the image beam.

In an embodiment of the present invention, the above-mentioned light guide component can slide or rotate relative to the protective wall, or the light guide component and the protective wall can be separated.

In an embodiment of the invention, the projection device further includes a sensor. The sensor is arranged in the accommodation space. The sensor can sense an input signal to switch a projection parameter of the opto-mechanical component.

In an embodiment of the present invention, the above-mentioned display wall further includes a top cover. The upper cover is connected between the display curved surface and a plurality of protective walls. The upper cover is perpendicular to one of the plurality of protective walls on which the light guide assembly is provided.

In an embodiment of the present invention, the above-mentioned light guide component further includes a reflector having a reflective surface. The angle between the reflective surface and the upper cover is in the range of 35 degrees to 55 degrees.

In an embodiment of the present invention, one of the plurality of protective walls on which the light guide assembly is provided includes a first planar portion and a second planar portion. The light guide component is slidably sleeved outside the second plane part. By sliding the light guide component relative to the second plane portion, the light guide component is moved out of or into the transmission path of the image beam.

In an embodiment of the present invention, the above-mentioned light guide component further includes a reflector having a reflective surface. The included angle between the reflective surface and the first plane part is in the range of 35 degrees to 55 degrees.

In an embodiment of the present invention, the above-mentioned second plane part includes a light-transmitting flat plate. In the second projection mode, the image beam penetrates the light-transmitting plate and is projected out of the projection device.

Based on the above, in one embodiment of the present invention, since the light guide component of the projection device is designed to be movably disposed on one of the protective walls, the projection device can provide multiple projection modes. Compared with traditional spherical projectors, the projection device according to an embodiment of the present invention not only retains the advantage of using less space as a spherical projector, but also provides multiple projection modes, thereby increasing the utilization rate of the projection device.

FIG. 1A is a perspective view of a projection device according to the first embodiment of the present invention. FIG. 1B is a perspective view of the projection device according to the first embodiment of the present invention from another perspective. 1C is a schematic cross-sectional view of the projection device in the first projection mode according to the first embodiment of the present invention. Please refer to FIG. 1A, FIG. 1B and FIG. 1C. An embodiment of the present invention provides a projection device 10 suitable for providing multiple projection modes. The projection device 10 includes a housing module 100 and a projection module 200 . The housing module 100 includes a display wall 110 and a plurality of protective walls 120. The plurality of protective walls 120 include, for example, protective walls 120A, 120B, 120C, 120D, and 120E. The display wall 110 and the protective walls 120 surround an accommodation space S. . In this embodiment, the projection device 10 may further include a transparent protective cover disposed on the display wall 110 , for example, covering the display wall 110 to protect the display wall 110 . The transparent protective cover is made of transparent material, for example.

In this embodiment, the protective wall 120 may be made of plastic, metal or other suitable materials. The protective wall 120A, the protective wall 120B and the display wall 110 are respectively opposite to the protective wall 120C, the protective wall 120D and the protective wall 120E. The display wall 110 is connected to the protective walls 120A, 120B, 120C, and 120D, and the protective wall 120C is connected to the display wall 110 and the protective walls 120B, 120D, and 120E. In this embodiment, the height HA of the protective wall 120A relative to the protective wall 120E is smaller than the height HC of the protective wall 120C relative to the protective wall 120E, so that the display wall 110 is inclined relative to the protective wall 120E.

In this embodiment, the display wall 110 includes a display curved surface 112, and the curvature of the display curved surface 112 may be a positive value (such as a convex curved surface), a negative value (such as a concave curved surface), zero (such as a plane), or an indefinite value (such as ellipsoid or wave surface), the curvature and shape of the display surface 112 are not particularly limited. The projection module 200 is disposed in the accommodation space S, and includes an optomechanical component 210 and a light guide component 220 . The opto-mechanical component 210 may include a light source (not shown), a light modulator (not shown), a projection lens (not shown), and various optical components such as collimation, beam expansion, beam contraction, and spot adjustment in the optical path. In addition, the light guide component 220 is movably disposed on one of the plurality of protective walls 120A, 120B, 120C, and 120D. In this embodiment, the protective wall 120C is provided with an opening O, and the light guide component 220 is disposed on the protective wall 120C and can switchably cover or not cover the opening O.

Specifically, in the first projection mode of this embodiment, the light guide component 220 covers the opening O, and the optomechanical component 210 projects the image beam B along the first axis L1 to the light guide component 220 . The light guide component 220 projects the image beam B to the display curved surface 112 along the second axis L2, where the first axis L1 and the second axis L2 are not parallel to each other. Specifically, the first axis in the present invention refers to the direction in which the optical-mechanical component projects the image beam, and the first axis and the second axis are the transmission directions of the main beam (or central beam) of the image beam.

FIG. 1D is a schematic cross-sectional view of the projection device in the second projection mode according to the first embodiment of the present invention. Please refer to FIG. 1D . In the second projection mode, the light guide component 220 is moved out of the transmission path of the image beam B, that is, the light guide component 220 does not cover the opening O, so that the image projected by the light machine component 210 along the first axis L1 The light beam B passes through the opening O and is directly projected out of the projection device 10 . In this embodiment, the light guide component 220 is moved out of the transmission path of the image beam B after being rotated relative to the protective wall 120C, for example. A part of the light guide component 220 is connected to the opening O (protective wall 120C) through mechanical components such as rotating shafts, buckles, and buckles, and the rotation of these mechanical components causes the light guide component 220 to be moved out of the transmission path of the image beam B. . The above-mentioned rotation is, for example, the light guide assembly 220 rotating toward the outside of the projection device 10 .

In this embodiment, the first axis L1 and the protective walls 120A, 120B, 120C, 120D, and 120E are not perpendicular to each other. The second axis L2 and the protective walls 120A, 120B, 120C, 120D, and 120E are not perpendicular to each other.

In this embodiment, the display curved surface 112 is a part of a spherical surface, such as a hemisphere, a 1/3 sphere, a 2/3 sphere, and so on. However, the present invention is not limited to this. In another embodiment, the display curved surface may be a complete spherical surface.

In this embodiment, the display wall 110 further includes an upper cover 114 . The upper cover 114 is connected between the display curved surface 112 and the protective walls 120A, 120B, 120C, and 120D. The upper cover 114 is preferably made of opaque material to cover the components arranged in the accommodation space S. The material of the upper cover 114 includes a high reflectivity material, such as a reflector. The high reflectivity material (or reflector) is, for example, disposed on the surface of the upper cover 114 on the side away from the accommodation space S. When the projection device 10 is in the first projection mode, the upper cover 114 made of high-reflectivity material can reflect part of the light transmitted from the display curved surface 112 , thus allowing the user to have a visual extension effect when viewing from the outside of the projection device 10 , thus increasing the number of projections. Effect.

Furthermore, the included angle between the upper cover 114 and one of the protective walls 120A, 120B, 120C, and 120D (for example, the protective wall 120C of this embodiment) on which the light guide assembly 220 is installed is in the range of 60 degrees to 80 degrees. within.

In this embodiment, the light guide assembly 220 includes a reflective mirror 222 having a reflective surface 220R, and the reflective mirror 222 can be moved out or moved into the opening O of the protective wall 120C. In this embodiment, the angle between the reflective surface 220R and the upper cover 114 is in the range of 50 degrees to 70 degrees. In other words, the reflective surface 220R and the protective wall 120C may be parallel or non-parallel, which is not particularly limited by the present invention. In this embodiment, the light guide component 220 may further include a protective plate 224, the reflector 222 is disposed on the protective plate 224, and the light guide component 220 is disposed on the protective wall 120C through the protective plate 224, for example.

In this embodiment, the display curved surface 112 is preferably made of a light-transmitting and hazy material, so that viewers on one side of the display curved surface 112 can see the optical-mechanical component 210 disposed on the other side of the display curved surface 112 . Projected image beam B. For example, the display curved surface 112 includes a transparent substrate and a diffusion layer stacked on each other. The haze of the diffusion layer falls in the range of 60% to 80%.

In one embodiment, the display curved surface 112 may include a transparent substrate mixed with a plurality of diffusion particles. The particle diameter of the plurality of diffusing particles falls within the range of 3 microns to 20 microns.

In one embodiment, the projection device 10 further includes a control component 300 and a sensor 400 (shown in FIG. 1C ). The control element 300 and the sensor 400 are disposed in the accommodation space S, where the control element 300 is electrically connected to the sensor 400 and the opto-mechanical component 210 .

In one embodiment, the control element 300 includes, for example, a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a programmable controller, a programmable The present invention is not limited to a programmable logic device (PLD) or other similar devices or combinations of these devices. In addition, in one embodiment, each function of the control component 300 may be implemented as multiple program codes. These program codes will be stored in a memory unit, and the control component 300 will execute these program codes. Alternatively, in one embodiment, each function of the control component 300 may be implemented as one or more circuits. The present invention is not limited to using software or hardware to implement each function of the control component 300 .

In addition, in one embodiment, the sensor 400 can sense an input signal I to switch the projection parameters of the opto-mechanical component 210 . The sensor 400 is, for example, a vibration sensor, a light sensor, or a sound sensor. The input signal I is, for example, a signal generated by vibration, clapping, sound, touch, etc., and the projection parameter is, for example, power on/off, playback, etc. mode or playback content, etc. When the control element 300 receives the input signal I from the sensor 400, the controller 300 can control the opto-mechanical component 210 to switch the projection parameters.

In one embodiment, the projection device 10 further includes an operating component 500 (shown in FIG. 1A ). The operating element 500 is disposed on the protective wall 120A, but the present invention is not particularly limited. The operating element 500 can be disposed at any position that is convenient for the user to operate. The operating element 500 is, for example, a knob. The control element 300 is electrically connected to the operating element 500 . Therefore, the user can switch the projection parameters of the opto-mechanical component 210 through the control element 300 .

Based on the above, in an embodiment of the present invention, since the projection device 10 includes a display wall 110, protective walls 120A, 120B, 120C, 120D, 120E, an optical machine component 210 and a light guide component 220, the light guide component 220 is designed as Movably disposed on one of the protective walls 120A, 120B, 120C, and 120D, the projection device 10 can provide multiple projection modes. For example, in the first projection mode (rear projection: spherical projection mode), the image beam B is projected to the display curved surface 112 of the display wall 110 through the light guide component 220 . In the second projection mode (direct projection mode), the light guide component 220 moves out of the transmission path of the image beam B, so that the image beam B is directly projected out of the projection device 10 . Compared with traditional spherical projectors, the projection device 10 according to an embodiment of the present invention not only retains the advantage of using less space as a spherical projector, but also provides multiple projection modes, thereby increasing the usage of the projection device 10 .

FIG. 2 is a schematic cross-sectional view of the projection device in the second projection mode according to the second embodiment of the present invention. Please refer to FIG. 1C and FIG. 2 . The difference between the projection device 10A in FIG. 2 and the projection device 10 in FIG. 1 is only in the connection method between the light guide component and the protective wall 120C. The first projection mode of the projection device 10A is similar to the first projection mode of the projection device 10 in FIG. 1C and will not be described again. The main differences between the second projection mode of the projection device 10A and the second projection mode of the projection device 10 of FIG. 1D are as follows. In this embodiment, the light guide component (for example, the light guide component 220 of FIG. 1C ) of the projection device 10A is detachable from the protective wall 120C. The light guide component is temporarily disposed at the opening O, for example, through magnetic attraction or a pop-up design. Therefore, when the projection device 10A is in the second projection mode, the light guide component 220 can be separated from the protective wall 120C, so that the light guide component 220 can be separated from the protective wall 120C. The optical component 220 is moved out of the transmission path of the image beam B. The advantages of the projection device 10A are similar to those of the projection device 10 and will not be described again here. In other embodiments, the light guide component 220 of the projection device 10A can slide relative to the protective wall 120C. For example, the light guide component 220 slides along the optical machine component 210 toward/the opposite direction of the display curved surface 112 through the slide rail, and The light guide component 220 is moved out of the transmission path of the image beam B.

3A is a schematic cross-sectional view of the projection device in the first projection mode according to the third embodiment of the present invention. FIG. 3B is a schematic cross-sectional view of the projection device in the second projection mode according to the third embodiment of the present invention. Please refer to FIG. 3A and FIG. 3B. The projection device 10B of FIG. 3A is similar to the projection device 10 of FIG. 1C, and the main differences are as follows. In this embodiment, the protective wall 120 further includes an outer side wall 122 . The outer wall 122 is slidably (for example, through a slide rail) sleeved on at least one of the protective walls 120A, 120B, 120C, 120D, and 120E. In this embodiment, the side wall 122 is, for example, set outside the protective walls 120A, 120C, and 120E. The light guide component 220 is disposed on the outer wall 122 . By sliding the outer wall 122 relative to the protective walls 120A and 120C, the light guide component 220 is moved out of or into the transmission path of the image beam B. When the light guide component 220 is moved into the transmission path of the image beam B, as shown in FIG. 3A , the projection device 10B is used to provide the first projection mode. When the light guide component 220 is moved out of the transmission path of the image beam B, as shown in FIG. 3B , the projection device 10B is used to provide a second projection mode.

Based on the above, the projection device 10B of the above embodiment of the present invention is, for example, disposed in a groove of a desk or a display table, and the outer wall 122 is, for example, the inner wall of the groove of a desk or a display table, but is not limited thereto. When the projection device 10B is lifted off the desktop, direct projection (second projection mode) can be provided. When the projection device 10B is lowered, spherical projection (first projection mode) can be provided. The remaining advantages of the projection device 10B are similar to those of the projection device 10 and will not be described again here.

FIG. 4 is a schematic cross-sectional view of the projection device in the third projection mode according to the fourth embodiment of the present invention. Please refer to FIG. 1C and FIG. 4 . The projection device 10C in FIG. 4 is similar to the projection device 10 in FIG. 1C . The main differences are as follows. In this embodiment, the display wall of the projection device 10C (such as the display curved surface 112 in FIG. 1C ) is a detachable or movable part. FIG. 4 illustrates the state after the display wall of the projection device 10C has been removed or moved. . In the third projection mode, the display wall is moved out of the transmission path of the image beam B, so that the optomechanical component 210 projects the image beam B to the light guide component 220 along the first axis L1. The image beam B is directly projected out of the projection device 10C along the second axis L2 via the light guide component 220 . In addition to providing a third projection mode, the remaining advantages of the projection device 10C are similar to those of the projection device 10 and will not be described again here.

FIG. 5A is a schematic cross-sectional view of the projection device in the first projection mode according to the fifth embodiment of the present invention. FIG. 5B is a schematic cross-sectional view of the projection device in the second projection mode according to the fifth embodiment of the present invention. Please refer to FIGS. 5A and 5B . The projection device 10D of FIG. 5A is similar to the projection device 10 of FIG. 1C . The main differences are as follows. In this embodiment, the upper cover 114 of the display wall 110 is perpendicular to one of the protective walls 120A, 120B, 120C, and 120D (for example, the protective wall 120C of this embodiment) on which the light guide assembly 220 is provided. Furthermore, the upper cover 114 is perpendicular to the protective walls 120A, 120B, 120C, and 120D respectively.

In this embodiment, the angle between the reflective surface 220R of the light guide component 220 and the upper cover 114 is in the range of 35 degrees to 55 degrees. Moreover, the included angle between the reflective surface 220R and one of the protective walls 120A, 120B, 120C, and 120D (for example, the protective wall 120C of this embodiment) on which the light guide assembly 220 is installed is in the range of 35 degrees to 55 degrees. .

In this embodiment, one of the protective walls 120A, 120B, 120C, and 120D (for example, the protective wall 120C of this embodiment) on which the light guide assembly 220 is provided includes a first planar portion 120C-1 and a second planar portion 120C. -2. Specifically, the first planar portion 120C-1 of the protective wall 120C is connected to the upper cover 114 and is perpendicular to each other, the first planar portion 120C-1 is connected to the second planar portion 120C-2, and the light guide assembly 220 is slidably sleeved on the protective wall 120C. Outside the second planar portion 120C-2. By sliding the light guide component 220 relative to the second planar portion 120C-2, the light guide component 220 is moved out of or into the transmission path of the image beam B. In the first projection mode, the angle between the reflective surface 220R of the light guide assembly 220 and the first planar portion 120C-1 is in the range of 125 degrees to 145 degrees. parallel, as shown in Figure 5A. In the second projection mode, the angle between the reflective surface 220R of the light guide component 220 and the first planar portion 120C- 1 is in the range of 35 degrees to 55 degrees. Moreover, the second planar portion 120C-2 includes a light-transmitting flat plate 120C-2T. In the second projection mode, the image beam B penetrates the light-transmitting plate 120C-2T and is projected out of the projection device 10D. The advantages of the projection device 10D are similar to those of the projection device 10 and will not be described again here. It should be noted that although in this embodiment the light guide component 220 is shown as having a triangular appearance and moves in a sliding manner, the invention is not limited thereto. The light guide component 220 of the present invention only needs to include the reflector 222 with the reflective surface 220R. The appearance of the light guide component 220 is not particularly limited, nor is the way the light guide component 220 moves.

To sum up, in one embodiment of the present invention, since the projection device includes a display wall, a protective wall, an opto-mechanical component and a light guide component, the light guide component is designed to be movably disposed on one of the protective walls. The projection device can provide multiple projection modes. Compared with traditional spherical projectors, the projection device according to an embodiment of the present invention not only retains the advantage of using less space as a spherical projector, but also provides multiple projection modes, thereby increasing the utilization rate of the projection device.

However, the above are only preferred embodiments of this invention, and should not be used to limit the scope of implementation of this invention, that is, any simple equivalent changes and modifications made based on the patentable scope and novel description content of this invention, All are still within the scope of this creative patent. In addition, any embodiment or patentable scope of this invention does not need to achieve all the purposes, advantages or features disclosed in this invention. In addition, the abstract section and title are only used to assist in searching patent documents and are not intended to limit the scope of rights of this creation. In addition, the terms "first" and "second" mentioned in this specification or the patent application are only used to name elements or to distinguish different embodiments or scopes, and are not used to limit the number of elements. upper or lower limit.

10, 10A, 10B, 10C, 10D: Projection device 100: Shell module 110:Display wall 112:Display surface 114: Upper cover 120, 120A, 120B, 120C, 120D, 120E: protective wall 120C-1: First plane part 120C-2: Second plane part 120C-2T: Translucent flat panel 122: Lateral wall 200:Projection module 210: Opto-mechanical components 220:Light guide component 220R: Reflective surface 222:Reflector 224:Protective board 300:Control components 400: Sensor 500: operating components B:Image beam HA, HC: height I: input signal L1: first axis L2: Second axis O: Open your mouth S: Accommodation space

FIG. 1A is a perspective view of a projection device according to the first embodiment of the present invention. FIG. 1B is a perspective view of the projection device according to the first embodiment of the present invention from another perspective. 1C is a schematic cross-sectional view of the projection device in the first projection mode according to the first embodiment of the present invention. FIG. 1D is a schematic cross-sectional view of the projection device in the second projection mode according to the first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of the projection device in the second projection mode according to the second embodiment of the present invention. 3A is a schematic cross-sectional view of the projection device in the first projection mode according to the third embodiment of the present invention. FIG. 3B is a schematic cross-sectional view of the projection device in the second projection mode according to the third embodiment of the present invention. FIG. 4 is a schematic cross-sectional view of the projection device in the third projection mode according to the fourth embodiment of the present invention. FIG. 5A is a schematic cross-sectional view of the projection device in the first projection mode according to the fifth embodiment of the present invention. FIG. 5B is a schematic cross-sectional view of the projection device in the second projection mode according to the fifth embodiment of the present invention.

10:Projection device

112:Display surface

114: Upper cover

120A, 120C, 120E: Protective wall

200:Projection module

210: Opto-mechanical components

220:Light guide component

220R: Reflective surface

222:Reflector

224:Protective board

300:Control components

400: Sensor

B:Image beam

HA, HC: height

I: input signal

L1: first axis

L2: Second axis

O: Open your mouth

S: Accommodation space

Claims (16)

A projection device suitable for providing multiple projection modes, including a housing module and a projection module, wherein: the housing module includes a display wall and a plurality of protective walls, wherein the display wall and the plurality of The protective wall surrounds an accommodation space, and the display wall includes a display curved surface; the projection module is disposed in the accommodation space and includes an optical machine component and a light guide component, wherein the light guide component Movably disposed on one of the plurality of protective walls; in a first projection mode, the optomechanical component projects an image beam along a first axis to the light guide component, and the light guide component The image beam is projected to the display curved surface along a second axis, wherein the first axis and the second axis are not parallel to each other; and in a second projection mode, the light guide component is moved out of the On the transmission path of the image beam, the image beam projected by the opto-mechanical component along the first axis is directly projected out of the projection device, wherein the light guide component can be relative to the protective wall Sliding or rotating, or the light guide component and the protective wall can be separated. The projection device of claim 1, wherein the first axis and the plurality of protective walls are not perpendicular to each other, and the second axis and the plurality of protective walls are not perpendicular to each other. The projection device according to claim 1, wherein the display curved surface is a complete sphere or a part of a sphere. The projection device of claim 1, wherein the display wall further includes an upper cover, the upper cover is connected between the display curved surface and the plurality of protective walls, and the material of the upper cover includes a high reflectivity material. The projection device according to claim 4, wherein an included angle between the upper cover and one of the plurality of protective walls on which the light guide assembly is provided is in a range of 60 degrees to 80 degrees. The projection device of claim 4, wherein the light guide component further includes a reflecting mirror having a reflecting surface, and an angle between the reflecting surface and the upper cover is in the range of 50 degrees to 70 degrees. The projection device of claim 1, wherein the display curved surface includes a transparent substrate and a diffusion layer stacked on each other, and the haze of the diffusion layer falls within a range of 60% to 80%. The projection device of claim 1, wherein the display wall is a detachable or movable component, and in a third projection mode, the display wall is moved out of the transmission path of the image beam, so that the The optical machine component projects the image beam along the first axis to the light guide component, and the image beam is then directly projected out of the projection device along the second axis through the light guide component. The projection device of claim 1 further includes a sensor disposed in the accommodation space, and the sensor can sense an input signal to switch a projection parameter of the optical-mechanical component. The projection device according to claim 1, wherein the display wall further includes an upper cover, the upper cover is connected between the display curved surface and the plurality of protective walls, and the upper cover is provided with the light guide component The one of the plurality of protective walls is perpendicular to each other. The projection device of claim 10, wherein the light guide component further includes a reflecting mirror having a reflecting surface, and an angle between the reflecting surface and the upper cover is in the range of 35 degrees to 55 degrees. The projection device of claim 1, wherein one of the plurality of protective walls on which the light guide component is provided includes a first planar portion and a second planar portion, and the light guide component can The light guide component is slidably sleeved outside the second planar portion, and the light guide component is moved out of or into the transmission path of the image light beam by sliding relative to the second planar portion. The projection device of claim 12, wherein the light guide component further includes a reflecting mirror having a reflecting surface, and an angle between the reflecting surface and the first plane portion is between 35 degrees and 55 degrees. within the range. The projection device of claim 12, wherein the second plane part includes a light-transmitting flat plate, and in the second projection mode, the image beam penetrates the light-transmitting flat plate and is projected out of the projection outside the device. A projection device suitable for providing multiple projection modes, including a housing module and a projection module, wherein: the housing module includes a display wall and a plurality of protective walls, wherein the display wall and the plurality of The protective wall surrounds an accommodation space, and the display wall includes a display showing a curved surface; the projection module is disposed in the accommodation space and includes an optical machine component and a light guide component, wherein the light guide component is movably disposed on one of the plurality of protective walls. ; In a first projection mode, the opto-mechanical component projects an image beam along a first axis to the light guide component, and the light guide component projects the image beam along a second axis to the display a curved surface, wherein the first axis and the second axis are not parallel to each other; and in a second projection mode, the light guide component is moved out of the transmission path of the image beam, so that the optomechanical component moves along the The image beam projected by the first axis is directly projected out of the projection device, wherein the display curved surface includes a transparent substrate mixed with a plurality of diffusion particles, and the particle diameters of the plurality of diffusion particles fall within In the range of 3 microns to 20 microns. A projection device suitable for providing multiple projection modes, including a housing module and a projection module, wherein: the housing module includes a display wall and a plurality of protective walls, wherein the display wall and the plurality of The protective wall surrounds an accommodation space, and the display wall includes a display curved surface; the projection module is disposed in the accommodation space and includes an optical machine component and a light guide component, wherein the light guide component Movably disposed on one of the plurality of protective walls; in a first projection mode, the opto-mechanical component projects a shadow along a first axis image beam to the light guide component, the light guide component projects the image beam to the display curved surface along a second axis, wherein the first axis and the second axis are not parallel to each other; and In the second projection mode, the light guide component is moved out of the transmission path of the image beam, so that the image beam projected by the optomechanical component along the first axis is directly projected out of the projection device. , wherein the plurality of protective walls further include an outer side wall, the outer side wall is slidably sleeved outside at least one of the plurality of protective walls, and the light guide assembly is disposed on the outer side. On the wall, the outer wall slides relative to the plurality of protective walls, so that the light guide component is moved out of or moved into the transmission path of the image light beam.

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