Vibrating liquid spraying 3D projection method, device and system

Abstract

The invention relates to the technical field of stereo projection, and provides a vibration liquid spraying 3D stereo projection method, device and system, and the device comprises a vibration liquid spraying module, a projection module and a control module. According to the specific working mode, the vibration liquid spraying module sprays a liquid level and sends a vibration position signal to the control module, so that the vibration position corresponding to the current liquid level is determined, and the control module controls the projection module to project an image corresponding to the liquid level of the current vibration position; by using the persistence of vision, through rapid reciprocating vibration and projection of an image corresponding to a vibration position, a 3D image can be viewed from any position. The technical route is easy to implement, the 3D projection effect is good, and large-format 3D projection can be achieved through array arrangement.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fog / water curtain stereoscopic projection technology, in particular to a vibrating liquid spray 3D stereoscopic projection method, device and system. BACKGROUND

[0002] Water mist projection is a technology that uses a water curtain / fog curtain as a projection carrier and has a virtual three-dimensional effect. The projection is widely used in science and technology exhibitions, parks, museums and other places. Because it has certain light transmittance, the picture produces a three-dimensional 3D floating feeling, and the audience can freely shuttle in the image without affecting the image display, achieving the virtual effect of real people and pictures dancing together on the same stage. However, in the existing water mist projection technology, the projected picture can only present a 3D effect and cannot realize 3D stereoscopic images from any position. SUMMARY

[0003] In order to realize 3D stereoscopic images from any position, the present application provides a vibrating liquid spray 3D stereoscopic projection method, device and system.

[0004] The vibrating liquid spray 3D stereoscopic projection method, device and system are characterized in that a reciprocating vibrating liquid curtain, i.e. a fog curtain or a water curtain, is used as a projection screen for three-dimensional display.

[0005] The vibrating liquid spray 3D stereoscopic projection method comprises a vibrating liquid module, a projection module and a control module.

[0006] The vibrating liquid spray 3D stereoscopic projection method comprises the following steps:

[0007] The vibrating liquid module sprays a liquid surface and sends a vibrating position signal to the control module, thereby determining the vibrating position corresponding to the current liquid surface, and the control module controls the projection module to project the image corresponding to the liquid surface of the current vibrating position; the minimum vibration time required for the liquid surface to scan all reachable spaces is called the vibration period of the vibrating liquid module. Within a short period of time in one vibration period, the projection module continuously switches and projects the images corresponding to the liquid surfaces of different vibrating positions, which is a complete refresh of 3D stereoscopic projection; by using the visual persistence phenomenon, the image corresponding to the vibrating position is projected by rapid vibration, thereby realizing 3D stereoscopic images from any position.

[0008] The vibratory spraying module includes: a vibration module capable of reciprocating vibration for adjusting the position of the spraying section of the spraying assembly, including but not limited to a reciprocating telescopic motor, a reciprocating linear motor, and a reciprocating rotary motor; a spraying assembly, including but not limited to an acoustic spraying assembly (e.g., an ultrasonic piezoelectric ceramic spraying assembly with a liquid supply path), a pressure spraying assembly (e.g., a pump-boosted spraying assembly with a liquid supply path), a medium spraying assembly (e.g., a compressed air spraying assembly with a liquid supply path), a vibrating screen hole / vibrating plate spraying assembly (e.g., an electric vibrating screen hole spraying assembly with a liquid supply path), an electrostatic spraying assembly (e.g., a DC high-voltage electrostatic spraying assembly with a liquid supply path), and an electrothermal spraying assembly (e.g., a thin-film resistor spraying assembly with a liquid supply path); and a position sensor for measuring the vibration position of the spraying section of the above-mentioned spraying assembly, including but not limited to a Hall sensor, a distance sensor, a magnetic encoder, a photoelectric encoder, and a potentiometer sensor.

[0009] Preferably, the minimum vibration time required for the liquid surface of the vibrating spray module to scan the entire reachable space is called the vibration period of the vibrating spray module; the vibration period is not higher than the visual persistence period.

[0010] The projection module includes: an image processor for receiving and processing stereoscopic image data to obtain the desired projected image; and projection components, including but not limited to dot projector components (such as VCSEL dot projector components, Micro LED dot projector components), MEMS galvanometer projection components (such as laser galvanometer projection components), and DMD chip projection components (such as DLP projection components).

[0011] Preferably, the projection module projects an image onto the liquid surface sprayed by the vibrating spray module, and the projected image corresponds to the vibration position of the liquid surface.

[0012] Preferably, the projection part of the projection module remains relatively stationary with the spraying part of the vibrating spraying module. The projection part of the projection module can be fixed to the vibrating part of the vibrating module or to the vibrating part of other vibrating modules, thereby ensuring that the optical path between the projection part and the liquid surface remains unchanged during the vibration of the liquid surface, so that the projected image remains clear and the depth of focus problem of volumetric three-dimensional imaging is solved.

[0013] A vibrating liquid spraying 3D stereoscopic projection device includes the aforementioned vibrating liquid spraying module, the aforementioned projection module, and a control module. The control module includes, but is not limited to, an MCU controller, an FPGA controller, and a microcomputer controller. The vibrating liquid spraying module sprays liquid onto the surface and sends a vibration position signal to the control module, thereby determining the vibration position corresponding to the current liquid surface. The control module controls the projection module to project the image corresponding to the liquid surface at the current vibration position. Within one vibration cycle of the vibrating liquid spraying module, the projection module continuously switches and projects images corresponding to different vibration positions of the liquid surface; this constitutes one complete refresh of the 3D stereoscopic projection. Utilizing the phenomenon of visual persistence, through rapid vibration and the projection of images corresponding to the vibration positions, a 3D stereoscopic image can be viewed from any position.

[0014] The vibratory spraying 3D stereoscopic projection system includes the aforementioned vibratory spraying 3D stereoscopic projection device and an interactive control platform; wherein, the interactive control platform collects interactive signals and sends control commands to the vibratory spraying 3D stereoscopic projection device, and the vibratory spraying 3D stereoscopic projection device adjusts the 3D stereoscopic image according to the control commands, thereby realizing interactive display, including but not limited to translation, vibration, and scaling.

[0015] Preferably, the input devices for the interactive control platform to collect interactive signals include, but are not limited to: keyboard, mouse, gamepad / joystick, touch screen, microphone, camera, inertial measurement unit (IMU), ultrasonic receiver, infrared light receiver, and wireless communication receiver.

[0016] Optionally, the vibratory spray 3D stereoscopic projection system may also include a light-transmitting cover with a visible light transmittance of more than 80% to reduce the interference of external environmental factors (such as strong winds) on the vibratory spray 3D stereoscopic projection system without significantly affecting the viewing effect.

[0017] Optionally, the vibratory spraying 3D stereoscopic projection system may also include a fog absorber to reduce the interference of stray droplets in the sprayed liquid surface on the vibratory spraying 3D stereoscopic projection system without significantly affecting the viewing effect.

[0018] The advantages of this invention are: it enables viewing 3D stereoscopic images from any position and allows interaction with the 3D stereoscopic images; in practical applications, this invention can be used in fields such as medical treatment, gaming entertainment, military sand table, and science and technology exhibitions, promoting production, life, and social development; based on the vibrating liquid surface, this invention proposes a vibrating liquid spray 3D stereoscopic projection method, device, and system, which has a simple technical approach, good 3D stereoscopic projection effect, and can also achieve large-format 3D stereoscopic projection through array arrangement. Attached Figure Description

[0019] Figure 1 This is a simplified schematic diagram of an embodiment of the present invention.

[0020] Figure labeling: 1-Linear motor slider, 2-Projection module (image processor and Micro LED dot matrix projector), 3-Water supply hose, 4-Water container, 5-Liquid surface sprayed from nozzle, 6-Nozzle (straight fan shape), 7-Distance sensor (small black dot in the figure), 8-Pump booster, 9-Touch screen, 10-Microcomputer controller. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other. The following description is merely one embodiment of this invention and is not intended to limit the scope of protection of the claims. Furthermore, the following description should be understood and implemented by those skilled in the art; therefore, other equivalent modifications made based on the content disclosed in this invention, or all other embodiments obtained without inventive effort, should be included within the scope of the claims. The invention will now be described in detail with reference to embodiments.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged or combined where appropriate to illustrate embodiments of the invention described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] An embodiment of a vibration-jet 3D stereoscopic projection method, apparatus, and system, with reference to Figure 1The system includes a vibration spraying module (slider 1 of a linear motor, water supply hose 3, water container 4, nozzle (straight fan-shaped) 6, distance sensor (small black dot in the figure) 7, pump booster 8), a projection module (image processor and Micro LED dot matrix projector) 2, a control module (microcomputer controller 10), and an interactive control platform (touchscreen 9); wherein, the projection module (image processor and Micro LED dot matrix projector) 2, the image processor and Micro LED dot matrix projector 3, the water supply hose 4, the water container 4, the nozzle (straight fan-shaped) 6, the distance sensor (small black dot in the figure) 7, the pump booster 8, the projection module (image processor and Micro LED dot matrix projector) 2, the image processor and Micro LED dot matrix projector 10, and the interactive control platform (touchscreen 9); wherein, the projection module (image processor and Micro LED dot matrix projector) 2, the image processor and Micro Both the LED dot matrix projector 2 and the nozzle (straight fan-shaped) 6 are fixed on the slider 1 of the linear motor, so that the optical path between the projection part and the liquid surface remains unchanged during the reciprocating vibration of the liquid surface, keeping the projected image clear and solving the depth of focus problem of volumetric 3D imaging; the vibrating spray module sprays out the liquid surface (liquid surface 5 sprayed out by the nozzle) and sends a vibration position signal to the control module, thereby determining the vibration position corresponding to the current liquid surface. The control module controls the projection module to project the image corresponding to the liquid surface at the current vibration position; the minimum vibration time required to scan the entire reachable space of the liquid surface is called the vibration cycle of the vibrating spray module. Within a short period of one vibration cycle, the projection module continuously switches and projects the images corresponding to the liquid surface at different vibration positions, which is a complete refresh of 3D stereoscopic projection; by utilizing the phenomenon of visual persistence, through rapid vibration and projection of the image corresponding to the vibration position, a 3D stereoscopic image can be achieved from any position.

[0024] For ease of understanding, the above embodiment uses a linear fan-shaped nozzle and a refresh rate of 30Hz as an example: Given a refresh rate of 30Hz, the vibration period of the vibrating spray module is 1 / 30Hz. Therefore, the vibration frequency of the linear motor's slider 1 should be 30 / 2 = 15Hz. Thus, in this 3D stereoscopic projection embodiment, when projecting images, a complete refresh is defined as a period of 1 / 30Hz, and the vibration frequency of the linear motor's slider 1 should be 15Hz. It should be noted that the nozzle described above is not limited to a linear fan shape and is only used for illustrative purposes in this embodiment.

[0025] Preferably, interactive signals can be collected through the touch screen 9, and the 3D stereoscopic image can be adjusted according to the interactive control instructions, including but not limited to translation, vibration, and scaling of the 3D stereoscopic image, thereby realizing interactive display.

[0026] Optionally, the vibratory spray 3D stereoscopic projection system may also include a light-transmitting cover with a visible light transmittance of more than 80% to reduce the interference of external environmental factors (such as strong winds) on the vibratory spray 3D stereoscopic projection system without significantly affecting the viewing effect.

[0027] Optionally, the vibratory spraying 3D stereoscopic projection system may also include a fog absorber to reduce the interference of stray droplets in the sprayed liquid surface on the vibratory spraying 3D stereoscopic projection system without significantly affecting the viewing effect.

[0028] The advantages of this invention are: it enables viewing 3D stereoscopic images from any position and allows interaction with the 3D stereoscopic images; in practical applications, this invention can be used in fields such as medical treatment, gaming entertainment, military sand table, and science and technology exhibitions, promoting production, life, and social development; based on the vibrating liquid surface, this invention proposes a vibrating liquid spray 3D stereoscopic projection method, device, and system, which has a simple technical approach, good 3D stereoscopic projection effect, and can also achieve large-format 3D stereoscopic projection through array arrangement.

Claims

1. A method, apparatus and system for 3D stereoscopic projection by vibrating liquid spray, characterized in that, A reciprocatingly vibrating liquid curtain is used as a projection screen for three-dimensional volume display.

2. A method of 3D stereoscopic projection by vibrating liquid spray, characterized in that include: Vibration spraying module, projection module, and control module; The steps of the vibration-jet 3D stereoscopic projection method are as follows: The vibrating spray module sprays liquid onto the surface and sends a vibration position signal to the control module to determine the vibration position corresponding to the current liquid surface. The control module then controls the projection module to project the image corresponding to the liquid surface at the current vibration position. The minimum vibration time required to scan the entire reachable space is called the vibration cycle of the vibrating spray module. Within a short period of one vibration cycle, the projection module continuously switches and projects images corresponding to different vibration positions of the liquid surface, which constitutes one complete refresh of the 3D stereoscopic projection. Utilizing the phenomenon of visual persistence, by rapidly vibrating and projecting images corresponding to the vibration positions, a 3D stereoscopic image can be viewed from any position.

3. A vibrating fluid ejection module characterized by, include: A vibration module, capable of reciprocating vibration, is used to adjust the position of the spray section of the spray assembly, including but not limited to a reciprocating linear motor and a reciprocating rotary motor; Liquid spraying components, used to spray liquid onto the liquid surface, including but not limited to piezoelectric ceramic liquid spraying components, pump-boosted liquid spraying components, and vibrating screen / vibrating plate liquid spraying components; A position sensor is used to measure the vibration position of the spray section of the spray assembly, including but not limited to a distance sensor and a magnetic encoder.

4. The vibratory fluid ejection module of claim 3, wherein, The minimum vibration time required for the liquid surface of the vibrating spray module to scan the entire reachable space is called the vibration period of the vibrating spray module; the vibration period is not higher than the visual persistence period.

5. A projection module, characterized in that include: An image processor is used to receive and process stereoscopic image data to obtain the desired projected image; Projection components, including but not limited to dot matrix projector components and DMD chip projection components.

6. The projection module of claim 5, wherein, The projection module projects an image onto the liquid surface sprayed by the vibrating spray module, and the projected image corresponds to the vibration position of the liquid surface.

7. The projection module according to claim 5 or 6, characterized in that, The projection part of the projection module remains relatively stationary with the spraying part of the vibrating spraying module. The projection part of the projection module can be fixed to the vibrating part of the vibrating module or to the vibrating part of other vibrating modules, thereby ensuring that the optical path between the projection part and the liquid surface remains unchanged during the vibration of the liquid surface of the vibrating spraying module, so that the projected image remains clear and the depth of focus problem of volumetric three-dimensional imaging is solved.

8. A vibrating fluid 3D projection device, characterized in that include: The vibration spraying module of claim 3, the projection module of claim 5, and the control module; wherein the control module includes, but is not limited to, a microcomputer controller; the vibration spraying module sprays liquid onto the surface and sends a vibration position signal to the control module to determine the vibration position corresponding to the current liquid surface; the control module controls the projection module to project the image corresponding to the liquid surface at the current vibration position; within one vibration cycle of the vibration spraying module, the projection module continuously switches and projects images corresponding to liquid surfaces at different vibration positions, which is a complete refresh of the 3D stereoscopic projection; utilizing the persistence of vision, through rapid vibration and projection of images corresponding to the vibration positions, a 3D stereoscopic image can be achieved from any position.

9. A vibrating fluid 3D stereoscopic projection system characterized by, include: The vibration liquid jet 3D stereoscopic projection device and the interactive control platform of claim 8; wherein the interactive control platform collects interactive signals and sends control instructions to the vibration liquid jet 3D stereoscopic projection device, the vibration liquid jet 3D stereoscopic projection device adjusts the 3D stereoscopic image according to the control instructions, and then realizes interactive display, including but not limited to translation, vibration, and zooming.

10. The vibrating fluid ejection 3D stereoscopic projection system of claim 9, wherein, The input device of the interactive control platform for collecting interactive signals includes but is not limited to a keyboard, a mouse, a handle / rocker, a touch screen, a microphone, and a camera.

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