Projection device

Abstract

The present invention proposes a projection device 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. The display wall includes a display curved surface. The projection module includes an optical-mechanical component and a light-guiding component. In a first projection mode, the optical-mechanical component projects an image beam to the light-guiding component along a first axis. The light-guiding 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-guiding component is moved out of the transmission path of the image beam so that the image beam is directly projected out of the projection device. The projection device proposed by the present invention can provide multiple projection modes.

Description

Technical Field

[0001] The present invention relates to an optical device, and in particular to a projection device. Background Art

[0002] Existing projection technology uses the method of front projection or rear projection to project an image beam onto 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-mentioned usage requires a larger setting space. If it is only for the purpose of displaying images in a small area, or if you want to rely on a projector for local indoor layout, the traditional projector type is not suitable. Therefore, there are also other technologies that are developed to project images directly on the appearance parts: using the projection beam to be incident on the fog sphere on the appearance part, the image is displayed on the sphere by the principle of rear projection. Accordingly, it is only necessary to place the entire device in the space where it needs to be displayed, and various images can be displayed on the sphere to attract the user's attention while occupying a very small space.

[0003] However, although the above-mentioned spherical projection method can solve the space problem, it only has the spherical projection function and lacks the function of projecting onto a large screen like a traditional projector. For users, purchasing a dedicated device for this single spherical projection function will inevitably be used less frequently and will not be cost-effective. Summary of the invention

[0004] The invention provides a projection device which can provide multiple projection modes.

[0005] One embodiment of the present invention provides a projection device 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 curved surface. The projection module is disposed in the accommodation space and includes an optical-mechanical component and a light-guiding component, wherein the light-guiding component is movably disposed on one of the plurality of protective walls. In a first projection mode, the optical-mechanical component projects an image beam to the light-guiding component along a first axis. The light-guiding 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-guiding component is moved out of the transmission path of the image beam, so that the image beam projected by the optical-mechanical component along the first axis is directly projected out of the projection device.

[0006] Based on the above, in one embodiment of the present invention, since the light guide assembly 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 the traditional spherical projector, the projection device of one embodiment of the present invention not only retains the advantage of the spherical projector in that it uses less space, but also can provide multiple projection modes, thereby increasing the utilization rate of the projection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1A is a schematic three-dimensional diagram of a projection device according to a first embodiment of the present invention.

[0008] Figure 1B FIG. 4 is a schematic three-dimensional diagram of the projection device according to the first embodiment of the present invention at another viewing angle.

[0009] Figure 1C FIG. 4 is a schematic cross-sectional view of a projection device in a first projection mode according to a first embodiment of the present invention.

[0010] Figure 1D is a schematic cross-sectional view of the projection device according to the first embodiment of the present invention in the second projection mode.

[0011] Figure 2 is a schematic cross-sectional view of a projection device in a second projection mode according to a second embodiment of the present invention.

[0012] Figure 3A is a schematic cross-sectional view of a projection device in a first projection mode according to a third embodiment of the present invention.

[0013] Figure 3B is a schematic cross-sectional view of a projection device in a second projection mode according to a third embodiment of the present invention.

[0014] Figure 4 is a schematic cross-sectional view of a projection device in a third projection mode according to a fourth embodiment of the present invention.

[0015] Figure 5A is a schematic cross-sectional view of a projection device in a first projection mode according to a fifth embodiment of the present invention.

[0016] Figure 5B is a schematic cross-sectional view of a projection device in a second projection mode according to a fifth embodiment of the present invention. DETAILED DESCRIPTION

[0017] Figure 1A is a schematic three-dimensional diagram of a projection device according to a first embodiment of the present invention. Figure 1B FIG. 4 is a schematic three-dimensional diagram of the projection device according to the first embodiment of the present invention at another viewing angle. Figure 1C is a cross-sectional schematic diagram of a projection device in a first projection mode according to a first embodiment of the present invention. Figure 1A , Figure 1B and Figure 1COne embodiment of the present invention provides a projection device 10 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, wherein the plurality of protective walls 120 include, for example, protective walls 120A, 120B, 120C, 120D, and 120E, wherein the display wall 110 and the protective walls 120 surround an accommodating space S. In this embodiment, the projection device 10 may further include a transparent protective cover, which is disposed on the display wall 110, for example, covers the display wall 110 to protect the display wall 110. The transparent protective cover is, for example, made of a transparent material.

[0018] In this embodiment, the material of the protective wall 120 can be 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, the protective wall 120B, 120D, and 120E. In this embodiment, the height HA of the protective wall 120A relative to the protective wall 120E is less 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.

[0019] In the present embodiment, the display wall 110 includes a display curved surface 112, and the curvature of the display curved surface 112 can be positive (e.g., a convex curved surface), negative (e.g., a concave curved surface), zero (e.g., a plane) or an indefinite value (e.g., an ellipsoidal surface or a wavy curved surface). The curvature and shape of the display curved surface 112 are not particularly limited. The projection module 200 is disposed in the accommodating space S, and includes an optical machine component 210 and a light guide component 220. The optical machine component 210 may include a light source (not shown), an optical modulator (not shown), a projection lens (not shown), and various optical elements such as collimation, beam expansion, beam reduction, and spot adjustment in the optical path. In addition, the light guide component 220 can be movably disposed on one of the plurality of protective walls 120A, 120B, 120C, and 120D. In the present embodiment, an opening O is provided on the protective wall 120C, and the light guide component 220 is disposed on the protective wall 120C, and can switchably cover or not cover the opening O.

[0020] In detail, in the first projection mode of the present embodiment, the light guide component 220 covers the opening O, and the optical machine component 210 projects the image beam B to the light guide component 220 along the first axis L1. The light guide component 220 projects the image beam B to the display curved surface 112 along the second axis L2, wherein the first axis L1 and the second axis L2 are not parallel to each other. It is particularly noted that the first axis described in the present invention refers to the direction in which the optical machine component projects the image beam, and the first axis and the second axis are also the transmission directions of the main beam (or center beam) of the image beam.

[0021] Figure 1D is a cross-sectional schematic diagram of the projection device in the second projection mode according to the first embodiment of the present invention. Figure 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 beam B projected by the optical machine component 210 along the first axis L1 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, for example, rotating relative to the protective wall 120C. A portion of the light guide component 220 is connected to the opening O (protective wall 120C) through a mechanism such as a rotating shaft, a buckle, a buckle ring, and the like, and the light guide component 220 is moved out of the transmission path of the image beam B through the rotation of these mechanisms. The above-mentioned rotation is, for example, the rotation of the light guide component 220 toward the outside of the projection device 10.

[0022] In this embodiment, the first axis L1 and the protection walls 120A, 120B, 120C, 120D, and 120E are not perpendicular to each other. The second axis L2 and the protection walls 120A, 120B, 120C, 120D, and 120E are not perpendicular to each other.

[0023] In this embodiment, the display curved surface 112 is a part of a sphere, such as a hemisphere, a 1 / 3 sphere, a 2 / 3 sphere, etc. However, the present invention is not limited thereto, and in another embodiment, the display curved surface may be a complete sphere.

[0024] In the present 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 an opaque material to shield the components disposed in the accommodating 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 a side away from the accommodating space S. When the projection device 10 is in the first projection mode, the upper cover 114 made of a high reflectivity material can reflect part of the light transmitted from the display curved surface 112, thereby creating a visual extension effect when the user views the projection device 10 from the outside, thereby increasing the projection effect.

[0025] Furthermore, the angle between the upper cover 114 and one of the protective walls 120A, 120B, 120C, 120D where the light guide assembly 220 is disposed (for example, the protective wall 120C of the present embodiment) is within a range of 60 degrees to 80 degrees.

[0026] In the present embodiment, the light guide component 220 includes a reflector 222 having a reflective surface 220R, and the reflector 222 can be moved out of or into the opening O of the protective wall 120C. In the present embodiment, the angle between the reflective surface 220R and the upper cover 114 is within the range of 50 degrees to 70 degrees. In other words, the reflective surface 220R and the protective wall 120C can be parallel or non-parallel, and the present invention is not particularly limited to this. In the present 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, for example, disposed on the protective wall 120C via the protective plate 224.

[0027] In this embodiment, the display curved surface 112 is preferably made of a light-transmitting material with haze, so that a viewer on one side of the display curved surface 112 can see the image beam B projected by the optical-mechanical component 210 disposed on the other side of the display curved surface 112. 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 within the range of 60% to 80%.

[0028] In one embodiment, the display curved surface 112 may include a transparent substrate mixed with a plurality of diffusion particles, wherein the particle diameters of the plurality of diffusion particles fall within a range of 3 micrometers to 20 micrometers.

[0029] In one embodiment, the projection device 10 further includes a control element 300 and a sensor 400 (shown in FIG. Figure 1C The control element 300 and the sensor 400 are disposed in the accommodating space S, wherein the control element 300 is electrically connected to the sensor 400 and the optical-mechanical component 210 .

[0030] In one embodiment, the control element 300 includes, for example, a central processing unit (CPU), a microprocessor (microprocessor), a digital signal processor (DSP), a programmable controller, a programmable logic device (PLD) or other similar devices or a combination of these devices, and the present invention is not limited to this. In addition, in one embodiment, each function of the control element 300 can be implemented as a plurality of source codes. These source codes will be stored in a storage unit, and the control element 300 will execute these source codes. Alternatively, in one embodiment, each function of the control element 300 can be implemented as one or more circuits. The present invention is not limited to the implementation of each function of the control element 300 by software or hardware.

[0031] In addition, in one embodiment, the sensor 400 can sense the input signal I and switch the projection parameters of the optical-mechanical component 210. The sensor 400 is, for example, a vibration sensor, a light sensor, or a sound sensor, and the input signal I is, for example, a signal generated by vibration, clapping, sound, touch, etc., and the projection parameters are, for example, power on / off, play mode, or play content, etc. When the control element 300 receives the input signal I from the sensor 400, the controller 300 can control the optical-mechanical component 210 to switch the projection parameters.

[0032] In one embodiment, the projection device 10 further includes an operating element 500 (shown in FIG. Figure 1A ). The operating element 500 is disposed on the protective wall 120A, but the present invention does not impose any particular limitation thereto, and 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 optical-mechanical assembly 210 through the control element 300.

[0033] Based on the above, in one embodiment of the present invention, since the projection device 10 includes the display wall 110, the protective walls 120A, 120B, 120C, 120D, 120E, the optical machine assembly 210 and the light guide assembly 220, the light guide assembly 220 is designed to be movably disposed on one of the protective walls 120A, 120B, 120C, 120D, so that 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 onto the display curved surface 112 of the display wall 110 through the light guide assembly 220. In the second projection mode (direct projection mode), the light guide assembly 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 the traditional spherical projector, the projection device 10 of one embodiment of the present invention not only retains the advantage of the spherical projector in that it uses less space, but also provides multiple projection modes, thereby increasing the utilization rate of the projection device 10.

[0034] Figure 2 is a cross-sectional schematic diagram of a projection device in a second projection mode according to a second embodiment of the present invention. Figure 1C and Figure 2 , Figure 2 The projection device 10A and Figure 1C The difference between the projection device 10A and the projection device 10A is only the connection method between the light guide assembly and the protective wall 120C. Figure 1C The second projection mode of the projection device 10A is similar to the first projection mode of the projection device 10, and will not be described in detail here. Figure 1D The main differences of the second projection mode of the projection device 10 are as follows. In this embodiment, the light guide component (eg Figure 1C The light guide component 220 of the projection device 10A can be separated from the protective wall 120C. The light guide component is temporarily set at the opening O by means of, for example, magnetic attraction or a pop-up design, so that when the projection device 10A is in the second projection mode, the light guide component 220 can be separated from the protective wall 120C, and the light guide component 220 can be moved out of the transmission path of the image light beam B. The advantages of the projection device 10A are similar to those of the projection device 10, and are not repeated 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 display surface 112 / in the opposite direction through a slide rail, so that the light guide component 220 is moved out of the transmission path of the image light beam B.

[0035] Figure 3A is a schematic cross-sectional view of a projection device in a first projection mode according to a third embodiment of the present invention. Figure 3B is a cross-sectional schematic diagram of a projection device in a second projection mode according to a third embodiment of the present invention. Figure 3A and Figure 3B , Figure 3A The projection device 10B and Figure 1C The main differences are as follows. In the present embodiment, the protective wall 120 further includes an outer wall 122. The outer wall 122 can be slidably (for example, through a slide rail) mounted on the outer side of at least one of the protective walls 120A, 120B, 120C, 120D, and 120E. In the present embodiment, the outer wall 122 is, for example, mounted on the outer sides of 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 light beam B. When the light guide component 220 is moved into the transmission path of the image light beam B, as shown in FIG. Figure 3A As shown, the projection device 10B is used to provide a 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. Figure 3B As shown, the projection device 10B is used to provide a second projection mode.

[0036] 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 side wall 122 is, for example, the inner wall of the groove of the desk or the display table, but is not limited thereto. When the projection device 10B is raised above 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 are not described in detail here.

[0037] Figure 4 FIG. 4 is a cross-sectional schematic diagram of a projection device in a third projection mode according to a fourth embodiment of the present invention. Figure 1C and Figure 4 , Figure 4 The projection device 10C and Figure 1C The projection device 10 is similar to the projection device 10 of FIG. 1 , and the main differences are as follows. In this embodiment, the display wall (eg, Figure 1C The display curved surface 112) is a removable or movable part, wherein Figure 4 The diagram shows a state where 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 optical machine component 210 projects the image beam B along the first axis L1 to the light guide component 220. The image beam B is then directly projected out of the projection device 10C along the second axis L2 via the light guide component 220. In addition to providing the third projection mode, the other advantages of the projection device 10C are similar to those of the projection device 10, which will not be repeated here.

[0038] Figure 5Ais a schematic cross-sectional view of a projection device in a first projection mode according to a fifth embodiment of the present invention. Figure 5B is a cross-sectional schematic diagram of a projection device in a second projection mode according to a fifth embodiment of the present invention. Figure 5A and Figure 5B , Figure 5A The projection device 10D and Figure 1C The projection device 10 of the embodiment is similar to the projection device 10 of the embodiment, and the main differences are as follows. In this embodiment, the upper cover 114 of the display wall 110 and one of the protective walls 120A, 120B, 120C, 120D on which the light guide assembly 220 is disposed (for example, the protective wall 120C of this embodiment) are perpendicular to each other. In other words, the upper cover 114 and the protective walls 120A, 120B, 120C, 120D are all perpendicular.

[0039] In this embodiment, the angle between the reflective surface 220R of the light guide assembly 220 and the upper cover 114 is within a range of 35 to 55 degrees. Moreover, the angle between the reflective surface 220R and one of the protective walls 120A, 120B, 120C, 120D on which the light guide assembly 220 is disposed (for example, the protective wall 120C of this embodiment) is within a range of 35 to 55 degrees.

[0040] In this embodiment, one of the protective walls 120A, 120B, 120C, and 120D on which the light guide component 220 is disposed (for example, the protective wall 120C of this embodiment) includes a first plane portion 120C-1 and a second plane portion 120C-2. Specifically, the first plane portion 120C-1 of the protective wall 120C is connected to the upper cover 114 and is perpendicular to each other, the first plane portion 120C-1 is connected to the second plane portion 120C-2, and the light guide component 220 is slidably mounted on the outer side of the second plane portion 120C-2. By sliding the light guide component 220 relative to the second plane 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, and the reflective surface 220R is parallel to the second planar portion 120C-2, for example. Figure 5AAs shown. In the second projection mode, the angle between the reflective surface 220R of the light guide component 220 and the first plane portion 120C-1 is in the range of 35 degrees to 55 degrees. Moreover, the second plane portion 120C-2 includes a light-transmitting plate 120C-2T. In the second projection mode, the image light 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 are not repeated here. It is particularly noted that although the light guide component 220 is illustrated as a triangular appearance and moves in a sliding manner in the present embodiment, the present invention is not limited to this. The light guide component 220 of the present invention only needs to include a reflector 222 having a reflective surface 220R, and the appearance of the light guide component 220 is not particularly limited, nor is the manner in which the light guide component 220 moves.

[0041] In summary, in one embodiment of the present invention, since the projection device includes a display wall, a protective wall, an optical machine component, and a light guide component, the light guide component is designed to be movably disposed on one of the protective walls, so that the projection device can provide multiple projection modes. Compared with a traditional spherical projector, the projection device of one embodiment of the present invention not only retains the advantage of a spherical projector that uses less space, but also provides multiple projection modes, thereby increasing the utilization rate of the projection device.

[0042] The above description is only a preferred embodiment of the present invention, and the scope of implementation of the present invention cannot be limited by this. That is, any simple equivalent changes and modifications made in accordance with the claims and the description of the present invention still fall within the scope of the patent coverage of the present invention. In addition, any embodiment or claim of the present invention is not required to achieve all the purposes, advantages or features disclosed by the present invention. In addition, the abstract of the specification and the name of the invention are only used to assist in the retrieval of patent documents, and are not used to limit the scope of rights of the present invention. In addition, the terms "first", "second", etc. mentioned in this specification or claims are only used to name the name of the element or to distinguish different embodiments or scopes, and are not used to limit the upper or lower limit of the number of elements.

[0043] Reference numerals list

[0044] 10, 10A, 10B, 10C, 10D: Projection device

[0045] 100: Shell module

[0046] 110: Display wall

[0047] 112: Display Surface

[0048] 114: Upper cover

[0049] 120, 120A, 120B, 120C, 120D, 120E: Protective wall

[0050] 120C-1: First plane part

[0051] 120C-2: Second plane part

[0052] 120C-2T: Translucent flat panel

[0053] 122: Outer wall

[0054] 200: Projection module

[0055] 210: Optical and mechanical components

[0056] 220: Light guide component

[0057] 220R: Reflective surface

[0058] 222: Reflector

[0059] 224: Protection board

[0060] 300: Control elements

[0061] 400:Sensor

[0062] 500: Operating elements

[0063] B: Image beam

[0064] HA, HC: height

[0065] I: Input signal

[0066] L1: First axis

[0067] L2: Second axis

[0068] O: Open

[0069] S: Accommodation space.

Claims

1. A projection device, characterized in that: The projection device is used to provide multiple projection modes, including a housing module and a projection module, wherein: The housing module comprises 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 comprises a display curved surface and an upper cover, the upper cover is connected to the display curved surface, one of the plurality of protective walls is provided with an opening and is connected to the display wall, the display wall is opposite to another of the plurality of protective walls, and the upper cover of the display wall is inclined relative to the other of the plurality of protective walls; The projection module is disposed in the accommodating space and includes an optical machine component and a light guide component, wherein the light guide component is movably disposed on the protective wall provided with the opening and can switchably cover or not cover the opening; In a first projection mode, the light guide component covers the opening, the optical mechanical component projects an image beam to the light guide component along a first axis, and 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 does not cover the opening and is moved out of the transmission path of the image light beam, so that the image light beam projected by the optical-mechanical component along the first axis passes through the opening and is directly projected out of the projection device.

2. The projection device according to claim 1, characterized in that: The first axis and the plurality of protection walls are not perpendicular to each other, and the second axis and the plurality of protection walls are not perpendicular to each other.

3. The projection device according to claim 1, characterized in that: The display curved surface is a complete sphere or a part of a sphere.

4. The projection device according to claim 1, characterized in that: The upper cover is connected between the plurality of protection walls, and the material of the upper cover includes a high reflectivity material.

5. The projection device according to claim 4, characterized in that: An angle between the upper cover and a protective wall among the plurality of protective walls on which the light guide assembly is disposed is within a range of 60 degrees to 80 degrees.

6. The projection device according to claim 4, characterized in that: The light guide assembly further includes a reflector having a reflective surface, and the angle between the reflective surface and the upper cover is in the range of 50 degrees to 70 degrees.

7. The projection device according to claim 1, characterized in that: The display curved surface includes transparent substrates and a diffusion layer stacked on each other, and the haze of the diffusion layer falls within a range of 60% to 80%.

8. The projection device according to claim 1, characterized in that: 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 a range of 3 micrometers to 20 micrometers.

9. The projection device according to claim 1, characterized in that: The display wall is a removable or movable part. In the third projection mode, the display wall is moved out of the transmission path of the image light beam, so that the optical machine component projects the image light beam along the first axis to the light guide component, and the image light beam is then directly projected out of the projection device along the second axis via the light guide component.

10. The projection device according to claim 1, characterized in that: The light guide component can slide or rotate relative to the protection wall, or the light guide component can be separated from the protection wall.

11. The projection device according to claim 1, characterized in that: The projection device further includes a sensor, which is disposed in the accommodating space and can sense an input signal to switch the projection parameters of the optical-mechanical component.

12. The projection device according to claim 1, characterized in that: The upper cover is connected between the plurality of protection walls, and the upper cover and a protection wall among the plurality of protection walls on which the light guide assembly is disposed are perpendicular to each other.

13. The projection device according to claim 12, characterized in that: The light guide assembly further includes a reflector having a reflective surface, and the angle between the reflective surface and the upper cover is in the range of 35 degrees to 55 degrees.

14. The projection device according to claim 1, characterized in that: One of the multiple protective walls on which the light guide component is disposed includes a first planar portion and a second planar portion. The light guide component can be slidably mounted on the outer side of the second planar portion. By sliding the light guide component relative to the second planar portion, the light guide component can be moved out of or into the transmission path of the image light beam.

15. The projection device according to claim 14, characterized in that: The light guide assembly further includes a reflector having a reflective surface, and an angle between the reflective surface and the first plane portion is in a range of 35 degrees to 55 degrees.

16. A projection device, characterized in that: The projection device is used to provide multiple projection modes, including a housing module and a projection module, wherein: The housing module comprises 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 comprises a display curved surface and an upper cover, the upper cover is connected to the display curved surface, one of the plurality of protective walls is provided with an opening and is connected to the display wall, the display wall is opposite to another of the plurality of protective walls, and the upper cover of the display wall is inclined relative to the other of the plurality of protective walls; The projection module is disposed in the accommodating space and includes an optical machine component and a light guide component, wherein the light guide component can switchably cover or not cover the opening; In a first projection mode, the light guide component covers the opening, the optical mechanical component projects an image beam to the light guide component along a first axis, and 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 does not cover the opening, and the light guide component is moved out of the transmission path of the image light beam, so that the image light beam projected by the optical-mechanical component along the first axis passes through the opening and is directly projected out of the projection device. Among them, the multiple protective walls also include an outer wall, which can be slidably mounted on the outer side of the protective wall with the opening, and the light guide component is arranged on the outer wall. By sliding the outer wall relative to the protective wall with the opening, the light guide component is moved out of or into the transmission path of the image light beam.

Images