CN112666816A - Movable holographic projection device and method - Google Patents

Movable holographic projection device and method Download PDF

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Publication number
CN112666816A
CN112666816A CN201910985840.0A CN201910985840A CN112666816A CN 112666816 A CN112666816 A CN 112666816A CN 201910985840 A CN201910985840 A CN 201910985840A CN 112666816 A CN112666816 A CN 112666816A
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China
Prior art keywords
holographic
holographic projection
movable
projection device
projector
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CN201910985840.0A
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CN112666816B (en
Inventor
彭刚
张丽
黄清萍
李亮
杨帆
程坤
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Tsinghua University
Nuctech Co Ltd
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Tsinghua University
Nuctech Co Ltd
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Priority to CN201910985840.0A priority Critical patent/CN112666816B/en
Priority to PCT/CN2020/091083 priority patent/WO2021073086A1/en
Publication of CN112666816A publication Critical patent/CN112666816A/en
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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03HHOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22Processes or apparatus for obtaining an optical image from holograms

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)
  • Holo Graphy (AREA)

Abstract

The present disclosure provides a movable hologram projection apparatus and a method of hologram projection using the same. The holographic projection device (100) comprises a movable base (110), a holographic projector (120) disposed on the movable base and configured to project a light beam comprising holographic image information towards the holographic projection plate, and a holographic projection plate (130) fixed to the movable base and configured to receive the light beam to form and display a virtual hologram.

Description

Movable holographic projection device and method
Technical Field
Embodiments of the present disclosure generally relate to the field of holographic projection technology, and more particularly, to a movable holographic projection apparatus and a method for holographic projection using the same.
Background
The holographic projection technology is also called as virtual imaging technology, is a technology for recording and reproducing a real image of an object by utilizing interference and diffraction principles, and has application ranges including product exhibition, automobile or clothing release, stage programs, interaction, bar entertainment, place interactive projection and the like.
In the conventional holographic projection technology, whether a pyramid or a pure semi-permeable membrane back projection is adopted, if the same effective visual picture is displayed, the pyramid-form holographic projection needs a very large floor area, and the pure holographic semi-permeable membrane back projection generally needs different space distance requirements of several meters to more than ten meters according to actual conditions; in addition, conventional holographic projection devices or holographic projection screens thereof are typically mounted on a stationary table. Thus, conventional holographic projection devices are fixed, immobile, not portable, and not convenient to use, adjust, and use in multiple applications.
Disclosure of Invention
The present disclosure is directed to overcoming at least one of the above-mentioned and other problems and disadvantages of the prior art.
According to one aspect of the present disclosure, there is provided a movable holographic projection apparatus including a movable base, a holographic projector disposed on the movable base and configured to project a light beam containing holographic image information toward the holographic projection plate, and a holographic projection plate fixed to the movable base and configured to receive the light beam to form and display a virtual hologram.
In some embodiments, the moveable base includes casters for rolling on the support surface.
In some embodiments, the caster comprises a fixable castor.
In some embodiments, the holographic projector is movably mounted on the movable base with respect to the movable base such that a projection distance of the holographic projector to the holographic projection plate is adjustable.
In some embodiments, the holographic projector is mounted for horizontal movement relative to the moveable mount, either closer to or further from the holographic projection plate.
In some embodiments, the moveable mount comprises a sliding track along which the holographic projector is arranged to perform said horizontal movement.
In some embodiments, the moveable mount comprises a lifting mechanism arranged to cause lifting movement of the holographic projector to adjust the position of the beam of light projected by the holographic projector onto the holographic projection plate.
In some embodiments, the holographic projection apparatus further comprises a light blocking plate disposed at a light exit side of the holographic projector and provided with a light exit port such that the light beam projected by the holographic projector is allowed to exit only from the light exit port.
In some embodiments, the distance of the holographic projection plate relative to the movable base is adjustable to adjust the projection distance of the holographic projector to the holographic projection plate.
In some embodiments, the holographic projection panel comprises a substrate comprising a front side and a back side, and a holographic projection film disposed on the back side of the substrate, the portion of the substrate on which the holographic projection film is disposed being transparent, the moveable mount and the holographic projector being located on the back side of the substrate.
In some embodiments, the moveable mount and the holographic projector are positioned below the holographic projection imaging area of the holographic projection plate such that the moveable mount and the holographic projector are not visible to a viewer positioned on the front side of the substrate.
In some embodiments, the holographic projector comprises an ultra-short focus holographic projector.
In some embodiments, the holographic projection device further comprises a detection arrangement configured to detect whether a moving object is present in the vicinity of the movable holographic projection device; the mobile holographic projection device is configured to execute a first interaction logic when the detection means detects the presence of a moving object in the vicinity of the mobile holographic projection device; and executing second interaction logic when the detection device detects that no moving target exists in the vicinity of the movable holographic projection device, wherein the second interaction logic is different from the first interaction logic.
According to another aspect of the present disclosure, there is provided a method of holographic projection using the holographic projection apparatus described in the present disclosure, including:
detecting whether a moving target exists near the movable holographic projection equipment;
executing, by the mobile holographic projection device, a first interaction logic when the detection device detects that the mobile object is present near the mobile holographic projection device;
upon detecting the absence of the moving object in the vicinity of the movable holographic projection device, executing, by the movable holographic projection device, a second interaction logic, the second interaction logic being different from the first interaction logic;
in each of the second interaction logic and the first interaction logic, playing the hologram by the movable holographic projection device.
In some embodiments, the first interaction logic comprises playing, by the mobile holographic projection device, the hologram and sound associated with the hologram simultaneously, and the second interaction logic comprises playing, by the mobile holographic projection device, only the hologram.
Other objects and advantages of the present disclosure will become apparent from the following detailed description of the disclosure, which proceeds with reference to the accompanying drawings, and may assist in a comprehensive understanding of the disclosure.
Drawings
The features and advantages of the present disclosure may be more clearly understood by reference to the accompanying drawings, which are illustrative and not intended to limit the disclosure in any way, and in which:
fig. 1 is a side perspective view illustrating a structure of a movable type hologram projection apparatus according to an exemplary embodiment of the present disclosure;
fig. 2 is a side view illustrating a structure of a movable type holographic projection apparatus according to an exemplary embodiment of the present disclosure, in which a portion of a housing of a base is removed to illustrate a structure inside thereof;
fig. 3 is a front view illustrating a structure of a movable type hologram projection apparatus according to an exemplary embodiment of the present disclosure;
fig. 4 is a rear view illustrating a structure of a movable type hologram projection apparatus according to an exemplary embodiment of the present disclosure; and
fig. 5 is a flowchart illustrating a method of performing holographic projection according to an exemplary embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.
Fig. 1 and 2 schematically show the structure of a holographic projection device according to an exemplary embodiment of the present disclosure. As shown, the exemplary holographic projection apparatus 100 is a movable holographic projection apparatus, and mainly includes a base 110, a holographic projector 120, and a holographic projection plate 130. The base 110 is a movable carrier, and may take various suitable forms as required, such as a cart, a box structure, and the like. The holographic projector 120 is disposed on the base 110 for projecting a light beam containing holographic image information to be displayed toward the holographic projection plate 130. A holographic projection plate 130 is fixed to the base 110 for receiving the projected beam from the holographic projector 120 to form and display a virtual hologram, such as a picture, a video, etc., so that a viewer can see the realistic hologram.
In embodiments of the present disclosure, the holographic projector and the holographic projection plate for generating a holographic image are both mounted to a base that is movable on a support surface (e.g., a floor or a table), so that the holographic projection apparatus can be flexibly arranged in a variety of applications without requiring a complicated mounting process, without being fixed and occupying a large space as conventional holographic projection apparatuses, thereby adapting to a variety of space projection requirements. In addition, since the holographic projector and the holographic projection plate are both mounted to the base, the optical path therebetween is not or not easily blocked by other obstacles, thereby being capable of providing a continuous projection display effect.
In the illustrated example, the base is a box or cabinet structure, and a movable mechanism may be mounted on the bottom thereof. For example, as shown in FIG. 2, the base 110 includes or is provided with rollers or casters 111 for rolling on a support surface. The rollers or casters may be mounted at the bottom corners of the base, on the one hand, to provide a moving function and, on the other hand, to provide a supporting and positioning function for the holographic projection device when the holographic projection device is placed in a suitable location. By way of example, the casters may include fixable casters to facilitate adjustment of the position and orientation of the base and holographic projection device. Further, in the illustrated example, the base 110 may also include or be provided with foot pads or leveling mechanisms 116, which may also be positioned at the bottom corners of the base, adjustable up and down to provide leveling functionality to the base and the holographic projection device. As shown, the rollers or casters 111, and/or foot pads or leveling mechanisms 116, may be at least partially concealed within the housing of the base 110.
In an exemplary embodiment of the present disclosure, the holographic projector is movable relative to the base, i.e., movably mounted on the base relative to the base, so that a projection distance of the holographic projector to the holographic projection plate is adjustable, so that a size, brightness, or position of a projection screen may be adjusted as desired. As an example, the holographic projector may be mounted to be capable of horizontal movement relative to the base, either closer to or further from the holographic projection plate. As shown in fig. 2, the movable base 110 includes or is provided with a slide rail 114 along which the holographic projector 120 is arranged to move horizontally to approach or move away from the holographic projection plate 130, enabling adjustment of the projection distance.
In other examples, the holographic projector may also be mounted to be movable horizontally or vertically parallel to the projection surface of the holographic projection plate, or angularly with respect to the holographic projection plate or base, as desired, to adjust the size, brightness, or position of the projected picture. As shown in FIG. 2, the base 110 includes or is provided with a lift mechanism 115, which may be disposed within the housing of the base, that may cause a lifting motion of the holographic projector 120 to adjust the position of the beam of light projected by the holographic projector 120 onto the holographic projection plate 130. In some examples, as shown in fig. 1 and 2, the base 110 may include a lower base 112 and an upper base 113, which are, for example, in the form of a box, the holographic projector 120 is mounted on the upper base 113, and the upper base 113 may, for example, be partially nested in the lower base 112, so that the upper base 113 can move up and down or up and down (similar to telescopic movement) relative to the lower base 112, for example, the upper base 113 is driven by the lifting mechanism 115 to perform such movement, so that the holographic projector 120 mounted on the upper base 113 can move in the vertical direction relative to the holographic projection board 130.
In some examples, the distance D (see, e.g., fig. 2) of the holographic projection plate relative to the base is also adjustable to adjust the projection distance of the holographic projector to the holographic projection plate. Such adjustment may be made, for example, by a fastener 133 that mounts or secures holographic projection plate 130 to base 110. Illustratively, the fastener may be in the form of a threaded rod, for example.
The above movement or adjustment greatly facilitates the adjustment of the dimensions of the mechanical structure to be adjusted in relation to the actual adjustment of the projected picture area. As will be appreciated by those skilled in the art, the movement of the holographic projector relative to the base or holographic projection plate may be accomplished in a variety of ways and is not limited to those illustrated or described herein. Furthermore, the movement or adjustment described herein may be performed automatically or controlled by a drive mechanism (e.g., a motor), such as by a controller within the holographic projector or a controller provided separately from the holographic projection device, or may be performed manually by an operator or installer. In addition, when the movable holographic projection device of the present disclosure is used, the relative positioning between the holographic projector and the holographic projection plate may be factory preset or preset during assembly, and the holographic projection can be achieved by starting the device, and/or may also be field adjustable, such as field adjustment of various projection parameters, such as the focal length, projection brightness, projection angle and distance, projection screen size and position, of the holographic projector, and the like, and for example, adjustment of some of these parameters may be achieved by the above-mentioned movements. In addition, in the embodiment of the disclosure, the base, the holographic projector and the holographic projector are modularized and are detachably assembled with each other, so that different configuration modules can be added according to different requirements.
In the illustrated embodiment, the holographic projection apparatus 100 further includes a light blocking plate 140 disposed at a light exit side of the holographic projector 120 and provided with a light exit port 141 such that all or a portion of the light beam projected by the holographic projector 120 is allowed to exit only from the light exit port, thereby preventing light from the holographic projector from leaking to the outside to cause interference or contamination of the generated hologram. In addition, the light blocking plate may block an edge portion of the light beam projected by the holographic projector such that a central portion where the brightness of the light beam is more concentrated, or a portion mainly containing holographic projection information, or a portion having a desired shape may be projected to the holographic projection plate through the light outlet, so that a clearer or higher-brightness holographic image may be generated.
In the illustrated embodiment, the holographic projection plate 130 is mounted or secured vertically to the base 110, such as to the side of the base 110, so that a person in the vicinity of the holographic projection device can view the hologram it produces; while the projected beam of the holographic projector 120 is angled or tilted with respect to the projection plane of the holographic projection plate 130. In other examples, the holographic projector may be positioned such that its projection beam is substantially perpendicular to the projection surface of the holographic projection plate, or the holographic projection plate may be otherwise oriented, such as obliquely, as desired, and the disclosure is not limited thereto.
In an exemplary embodiment, holographic projection panel 130 includes a substrate including a front surface 132 facing the viewer and a back or projection surface 131 opposite the front surface, and a holographic projection film disposed (e.g., affixed) on the back surface of the substrate, with base 110 and holographic projector 120 on the back side of the substrate. At least the portion of the substrate on which the holographic projection film is provided is transparent, for example, made of glass, so that a viewer on the front side of the substrate can see the hologram formed by the holographic projection film. For example, as shown in fig. 1 and 2, a lower portion of the substrate is fixed to a base 110, and an upper portion of the substrate is provided with a hologram projection film.
In some examples, as shown in fig. 1-4, base 110 and holographic projector 120 are positioned below holographic projection imaging area 134 of holographic projection plate 130 (e.g., the area where the holographic projection film is disposed) such that the portions of base 110 and holographic projector 120 that overlap holographic projection plate 130 are not visible to a viewer located on the front side of the substrate, thereby providing a better holographic display.
In the embodiments as shown in fig. 1 and 2, the holographic projection device further comprises a detection means 150, for example, for detecting whether a moving object, such as a person, is present in the vicinity of the holographic projection device, and based on the detection of the person or moving object in the vicinity of the holographic projection device by the detection means, a corresponding operation or interaction logic may be performed by the holographic projection device. Illustratively, the first interaction logic may be executed by the holographic projection device when the detection means detects the presence of the moving object in the vicinity of the holographic projection device; and when the detection means detects that no moving object is present in the vicinity of the holographic projection device, a second interaction logic may be executed by the holographic projection device, which may be completely or partially different from the first interaction logic, to better adapt to different scenarios or requirements.
In some examples, the first interaction logic includes playing, by the holographic projection device, the hologram and sound associated with the hologram simultaneously, and the second interaction logic includes playing, by the holographic projection device, only the hologram. For example, the holographic projection device can be used for guiding garbage classification, people are usually not available in the vicinity of a garbage can most of the time, and the sound image emitted all the time is not very suitable for the requirements of users, so that the played sound can be removed when people are not available in the vicinity, and only the holographic image is reserved. When someone approaches the holographic projection device, the holographic projection device simultaneously plays sound and holographic images to remind the personnel to perform garbage classification or garbage classification propaganda. For example, referring to FIG. 3, an audio player or speaker 160 may be provided on the front of the holographic projection device to play appropriate audio content as desired. The operations or interaction logic performed by the holographic projection device may include content that may be set to meet different application requirements.
By way of example, the detection device 150 may be disposed in a variety of locations, such as a side of a base, a front of a holographic projection plate, etc., and may include a variety of suitable sensing devices or sensors, such as a proximity sensor, an infrared sensor, a camera, etc. The detection means is in electrical communication with the holographic projector or the aforementioned controller to transmit thereto a signal indicative of the presence or absence of a moving object (e.g. a person) in the vicinity of the holographic projection device, and the holographic projector or the aforementioned controller may automatically adjust the operation or interaction logic of the holographic projection device, such as the played-back hologram, sound, etc., based on such a signal.
As shown in fig. 1 and 4, a button 117 and a power supply connector 118 may be provided on the base 110, the button 117 may be used to initiate the above-mentioned movement or adjustment, such as movement of the holographic projector relative to the holographic projection plate or base, and the power supply connector 118 is used to receive electrical power from a power supply to power the holographic projection device or various components therein, such as the holographic projector, a controller, a driving mechanism such as a motor, a detection device, a sound player, and other electronic components.
In the movable type hologram projection apparatus described in the embodiments of the present disclosure, the hologram projector may include an ultra-short focus hologram projector such as a reflective ultra-short focus hologram projector. As understood by those skilled in the art, an ultra-short focus projector may refer to a projector having a throw ratio (i.e., the ratio of the projection distance to the length of the bottom edge of the projected picture) of less than or equal to 0.6. In this context, an ultra-short-focus holographic projector is employed having a throw ratio of less than or equal to 0.6, preferably less than or equal to 0.4.
By using the ultra-short focus projection device, the projection resolution can reach 4K, and the projection distance can be further shortened, for example, the holographic projection distance can be successfully shortened to 30-40 cm from several meters away from the holographic film. The reduction of the projection distance can obviously improve the brightness of the holographic projection, and simultaneously, the power consumption and the heat dissipation are reasonably balanced. Meanwhile, due to the reduction of the projection distance, the interference of the object on the back to the projection effect is reduced, and the holographic projection effect is greatly enhanced. For example, the total weight of the movable holographic projection device described in the embodiments of the present disclosure may be controlled within 80KG, and the occupied area is, for example, about 0.275 square meters, which improves the space efficiency and the portability of the total device.
Fig. 5 schematically illustrates a method of holographic projection using the above-described holographic projection apparatus according to an exemplary embodiment of the present disclosure. As shown, in the method, the holographic projection device is first turned on in step S1, such as after the holographic projection device is properly positioned at the application site.
In step S2, the presence or absence of a person or moving object near the holographic projection apparatus is detected by the detection means, and this detection may be performed in real time or intermittently or periodically as necessary. Executing, by the holographic projection device, a first interaction logic upon detecting the presence of a person or moving object in the vicinity of the holographic projection device (see step S3); and upon detecting the absence of a person or moving object in the vicinity of the holographic projection device, performing a second interaction logic by the holographic projection device (see step S4), the second interaction logic being different from the first interaction logic. In some examples, the hologram may be played by the holographic projection device in both the second interaction logic and the first interaction logic. For example, the first interaction logic may include playing, by the holographic projection device, a hologram and a sound associated with the hologram simultaneously, and the second interaction logic may include playing, by the holographic projection device, only the hologram. The operation or interaction logic performed by the holographic projection device is not limited thereto and may be set or adjusted according to the actual application and requirements.
It is to be understood that the holographic projection apparatus and method provided by the present disclosure are not limited to the above garbage classification guidance or promotion as examples, but can also be applied to various occasions, such as product exhibition, car/clothing release, stage program, entertainment, interactive projection of places, information display, popular science caravan, and the like.
Although embodiments of the present disclosure have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined in the claims and their equivalents.

Claims (16)

1. A movable holographic projection device (100) comprising a movable base (110), a holographic projector (120) and a holographic projection plate (130),
a holographic projector disposed on the movable mount and configured to project a light beam containing holographic image information toward the holographic projection plate,
a holographic projection plate is secured to the movable base and configured to receive the light beam to form and display a virtual holographic image.
2. A moveable holographic projection device according to claim 1, wherein the moveable mount comprises castors (111) for rolling on a support surface.
3. A movable holographic projection device according to claim 2, wherein the caster comprises a fixable castor.
4. The movable holographic projection apparatus of claim 1, wherein the holographic projector is movably mounted on the movable base with respect to the movable base such that a projection distance of the holographic projector to the holographic projection plate is adjustable.
5. A transportable holographic projection apparatus according to claim 4, wherein the holographic projector is mounted for horizontal movement relative to the moveable mount towards and away from the holographic projection plate.
6. A moveable holographic projection device according to claim 5, wherein the moveable mount comprises a slide rail (114) along which the holographic projector is arranged to perform said horizontal movement.
7. A moveable holographic projection device as claimed in claim 1, wherein the moveable mount comprises a lifting mechanism (115) arranged to cause a lifting movement of the holographic projector to adjust the position of the beam of light projected by the holographic projector onto the holographic projection plate.
8. A transportable holographic projection apparatus according to claim 1, further comprising a light blocking plate (140) arranged at a light exit side of the holographic projector and provided with a light exit port (141) such that the light beam projected by the holographic projector is allowed to exit only from the light exit port.
9. The movable holographic projection device of claim 1, wherein a distance of the holographic projection plate with respect to the movable base is adjustable to adjust a projection distance of the holographic projector to the holographic projection plate.
10. A movable holographic projection device according to claim 1, wherein the holographic projection plate comprises a substrate and a holographic projection film, the substrate comprising a front surface (132) and a back surface (131), the holographic projection film being arranged on the back surface of the substrate, the part of the substrate where the holographic projection film is arranged being transparent, the movable mount and the holographic projector being located on the back surface side of the substrate.
11. The transportable holographic projection device of claim 10, wherein the movable mount and the holographic projector are positioned below the holographic projection imaging area of the holographic projection plate such that the movable mount and the holographic projector are not visible to a viewer positioned on the front side of the substrate.
12. A movable holographic projection device according to any of claims 1-10, wherein the holographic projector comprises an ultra-short focus holographic projector.
13. A movable holographic projection device according to any of claims 1-10, further comprising detection means (150) configured to detect the presence of a moving object in the vicinity of the movable holographic projection device,
the movable holographic projection device is configured to execute a first interaction logic when the detection means detects the presence of a moving object in the vicinity of the movable holographic projection device, and to execute a second interaction logic when the detection means detects the absence of a moving object in the vicinity of the movable holographic projection device, the second interaction logic being different from the first interaction logic.
14. The removable holographic projection device of claim 13, wherein the first interaction logic comprises playing the hologram and sound associated with the hologram simultaneously by the removable holographic projection device, and the second interaction logic comprises playing only the hologram by the removable holographic projection device.
15. A method of holographic projection using the movable holographic projection apparatus of claim 13, comprising:
detecting whether a moving target exists near the movable holographic projection equipment;
executing, by the mobile holographic projection device, a first interaction logic when the detection device detects that the mobile object is present near the mobile holographic projection device;
upon detecting the absence of the moving object in the vicinity of the movable holographic projection device, executing, by the movable holographic projection device, a second interaction logic, the second interaction logic being different from the first interaction logic;
wherein the hologram is played by the moveable holographic projection device in each of the second interaction logic and the first interaction logic.
16. The method of claim 15, wherein the first interaction logic comprises playing the hologram and a sound associated with the hologram simultaneously by a mobile holographic projection device, and the second interaction logic comprises playing only the hologram by the mobile holographic projection device.
CN201910985840.0A 2019-10-16 2019-10-16 Movable holographic projection device and method Active CN112666816B (en)

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PCT/CN2020/091083 WO2021073086A1 (en) 2019-10-16 2020-05-19 Movable holographic projection device and holographic projection method

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CN114609849B (en) * 2022-03-18 2024-03-08 杭州智科飞创信息科技有限公司 Portable projection arrangement for exhibitions

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JP2007114460A (en) * 2005-10-20 2007-05-10 Seiko Epson Corp Image display device
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