Spatial three-dimensional display device based on luminescent medium spatial volume screen

Abstract

This invention discloses a spatial three-dimensional display device based on a luminescent medium spatial volume screen. It comprises a spatial volume display carrier screen and an excitation light optical path system. The spatial volume display carrier screen is composed of a photosensitive material and a transparent container. The photosensitive material is an upconversion material, a type of stimulated light, and is distributed within the transparent container. The excitation light optical path system includes two invisible excitation beams: one beam is a two-dimensional image projected by a projection device; the other beam is a line light source rotating around a center point. During rotation, the line light source at different angles intersects with the projected two-dimensional image, exciting the photosensitive material to emit visible light, thereby displaying different two-dimensional images. Utilizing the persistence of vision phenomenon in the human eye, multiple two-dimensional images are superimposed to achieve spatial three-dimensional image display. This spatial three-dimensional display device based on a luminescent medium spatial volume screen achieves spatial volume three-dimensional image display by using two invisible beams to jointly excite the photosensitive material, which then emits visible light.

Description

Technical Field

[0001] This invention discloses a spatial three-dimensional display device, which relates to the field of three-dimensional image display systems. Background Technology

[0002] In today's information age, images have become an important way for people to obtain information. After decades of development, 2D display technology has reached a high level, capable of displaying high resolution and high color quality. However, the effect of 2D display is still significantly different from the effect of the human eye directly observing things; 2D displays cannot achieve the stereoscopic visual effect required by the human eye. Therefore, 3D display technology is receiving increasing attention, as its stereoscopic effect provides a strong visual impact and a better visual experience.

[0003] A three-dimensional scanning display system typically uses light-emitting devices to form a display plane on a square or circular substrate through an array. Then, by rotating or translating, different two-dimensional images are displayed at different positions. Each two-dimensional image cross-section is called an image slice. By superimposing and combining two-dimensional image slices, and utilizing the persistence of vision effect of the human eye, a three-dimensional spatial image is displayed.

[0004] However, in these solutions, the light-emitting devices and the supporting substrate used to display the image can cause image defects such as low transparency in the final displayed image, affecting the final image display effect.

[0005] In addition, in these solutions, the size of the pixels in the spatial three-dimensional display image depends on the diameter of the light-emitting device, which is usually very large. Furthermore, the spacing between the light-emitting devices in such solutions cannot be made imperceptible to the human eye. Therefore, the final display effect of such solutions has a grainy feel, and the display area of ​​the image has a sense of separation between pixels.

[0006] Therefore, improving the transparency of the displayed results and increasing the resolution of the displayed images are urgent issues that need to be addressed. Summary of the Invention

[0007] The purpose of this invention is to provide a spatial three-dimensional display device based on a spatial volume screen with a light-emitting medium, thereby improving the transparency and resolution of spatial three-dimensional display images.

[0008] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0009] A spatial three-dimensional display device based on a spatial volume screen with a light-emitting medium mainly comprises a spatial volume display carrier screen and a two-beam excitation light optical path system. The spatial volume display carrier screen is composed of a photosensitive material and a transparent container. The photosensitive material is distributed in the transparent container under the action of airflow. Of the two excitation light beams, one beam is a two-dimensional image projected by a projection device; the other beam is a line light source rotating around a center point. During the rotation, the line light source at different angles intersects with the projected two-dimensional image, exciting the photosensitive material to emit visible light, thereby displaying different two-dimensional images. Utilizing the persistence of vision phenomenon of the human eye, the two-dimensional images from multiple angles are superimposed to realize the spatial three-dimensional image display.

[0010] Preferably, the photosensitive material is doped with Er. 3+ NaYF4 solid particles or those whose main component is doped Er 3+ The solid particles of NaYF4 have a diameter of no more than 5000 μm.

[0011] Preferably, the photosensitive material is a Tm-doped material. 3+ NaGdF4 solid particles or those mainly composed of doped Tm 3+ The solid particles of NaGdF4 have a diameter of no more than 5000 μm.

[0012] Preferably, the photosensitive material is doped with Er. 3+ NaGdF4 dissolved in an oleic acid solution was atomized into an ultrasonic atomizing medium with a diameter of no more than 500 μm, and distributed in a transparent container.

[0013] Preferably, the photosensitive material is doped with Er. 3+ NaGdF4 dissolved in a cyclohexane solution was atomized into an ultrasonic atomizing medium with a diameter of no more than 500 μm, and distributed in a transparent container.

[0014] Preferably, the photosensitive material is doped with Er. 3+ NaGdF4 dissolved in chloroform solution was atomized into an ultrasonic atomizing medium with a diameter of no more than 500 μm, and distributed in a transparent container.

[0015] Preferably, the photosensitive material is a Tm-doped material. 3+ NaGdF4 dissolved in an oleic acid solution was atomized into an ultrasonic atomizing medium with a diameter of no more than 500 μm, and distributed in a transparent container.

[0016] Preferably, the photosensitive material is a Tm-doped material. 3+ NaGdF4 dissolved in a cyclohexane solution was atomized into an ultrasonic atomizing medium with a diameter of no more than 500 μm and distributed in a transparent container.

[0017] Preferably, the photosensitive material is a Tm-doped material.3+ NaGdF4 dissolved in chloroform solution was atomized into an ultrasonic atomizing medium with a diameter of no more than 500 μm and distributed in a transparent container.

[0018] Preferably, the photosensitive material is doped with Er. 3+ NaGdF4 solid particles or those mainly composed of Er-doped particles 3+ Solid particles of NaGdF4 with a diameter of no more than 5000 μm are distributed in water and circulate in a transparent container.

[0019] Preferably, the photosensitive material is a Tm-doped material. 3+ NaGdF4 solid particles or those mainly composed of doped Tm 3+ Solid particles of NaGdF4 with a diameter of no more than 5000 μm are distributed in water and circulate in a transparent container.

[0020] Preferably, the photosensitive material is doped with Er. 3+ NaGdF4 solid particles or those mainly composed of Er-doped particles 3+ Solid particles of NaGdF4 with a diameter of no more than 5000 μm are distributed in oleic acid and circulated in a transparent container.

[0021] Preferably, the photosensitive material is doped with Er. 3+ NaGdF4 solid particles or those mainly composed of Er-doped particles 3+ Solid particles of NaGdF4 with a diameter of no more than 5000 μm are distributed in cyclohexane and circulated in a transparent container.

[0022] Preferably, the photosensitive material is doped with Er. 3+ NaGdF4 solid particles or those mainly composed of Er-doped particles 3+ Solid particles of NaGdF4 with a diameter not exceeding 5000 μm are distributed in chloroform and circulated in a transparent container.

[0023] Preferably, the photosensitive material is a Tm-doped material. 3+ NaGdF4 solid particles or those mainly composed of doped Tm 3+ Solid particles of NaGdF4 with a diameter of no more than 5000 μm are distributed in oleic acid and circulated in a transparent container.

[0024] Preferably, the photosensitive material is a Tm-doped material. 3+ NaGdF4 solid particles or those mainly composed of doped Tm 3+ Solid particles of NaGdF4, with a diameter not exceeding 5000 μm, are distributed in cyclohexane and circulated in a transparent container.

[0025] Preferably, the photosensitive material is a Tm-doped material. 3+ NaGdF4 solid particles or those mainly composed of doped Tm 3+ Solid particles of NaGdF4, with a diameter not exceeding 5000 μm, are distributed in chloroform and circulated in a transparent container.

[0026] Preferably, the device includes a first excitation light source, a second excitation light source, a transparent container, and a photosensitive material, and further includes:

[0027] Dynamic beam expander: Located below the first laser source, used to control the beam diameter of the first laser source in real time;

[0028] Rotating lens group: Located below the dynamic beam expander, used to convert the light spot into a line light source; when the rotating lens group rotates, the line light source is also modulated into a line light source at different angles;

[0029] Transmission device: transmits power to the rotating lens group;

[0030] Electric motor: used to drive the transmission device;

[0031] Angle sensor: Located below the transmission device, used to detect the rotation angle of the transmission device;

[0032] Projection device: used to output two-dimensional images;

[0033] Controller: Used to receive the angle sensor signal and send control signals to the projection device;

[0034] Auxiliary device: located inside the transparent container;

[0035] Flow stabilizing device: located inside the transparent container.

[0036] More preferably, the first excitation light source outputs infrared laser light in the wavelength range of 800nm-2000nm; the second excitation light source outputs infrared laser light in the wavelength range of 800nm-2000nm. This provides the original light source for the projection device.

[0037] More preferably, the auxiliary device is a fan motor located at the bottom of the transparent container; the flow stabilizing device is located inside the transparent container, above the fan motor, and is used to stabilize the airflow of the fan motor.

[0038] More preferably, the auxiliary device is an atomizer located at the bottom of the transparent container; the flow stabilizing device is located inside the transparent container, above the atomizer, and is used to stabilize the size of the mist generated by the atomizer.

[0039] More preferably, the transparent container has a circulation branch; the auxiliary device is a liquid pump located in the circulation branch of the transparent container; the flow stabilizing device is located at the bottom of the transparent container and is used to stabilize the water flow rate of the liquid pump.

[0040] More preferably, the transmission device and the rotating lens group form a master-slave transmission structure, preferably a gear drive, belt drive, or chain drive.

[0041] Preferably, the spatial volume display carrier screen is composed of a photosensitive material and a transparent container, serving as a carrier screen for displaying spatial three-dimensional images. The transparent container is located below the rotating lens group, and the photosensitive material, serving as a carrier medium for displaying images, is distributed within the transparent container.

[0042] Preferably, the rotating lens group generates a line light source that rotates around the center point. During the rotation, the line light sources at different angles intersect with the projected two-dimensional image, exciting the photosensitive material in the transparent container to emit visible light and display different two-dimensional images. By utilizing the persistence of vision phenomenon of the human eye, the two-dimensional images at multiple angles are superimposed to realize the display of a three-dimensional image in space.

[0043] Compared with the prior art, the present invention has the following obvious and prominent substantive features and significant advantages:

[0044] 1. The excitation light path system of the device of the present invention includes two invisible excitation beams. One beam is a two-dimensional image projected by a projection device; the other beam is a line light source rotating around a center point. During the rotation, the line light source at different angles intersects with the projected two-dimensional image, exciting the photosensitive material to emit visible light, thereby displaying different two-dimensional images. Utilizing the persistence of vision phenomenon of the human eye, the two-dimensional images from multiple angles are superimposed to realize the display of a three-dimensional spatial image. This three-dimensional spatial display device based on a light-emitting medium spatial volume screen excites the photosensitive material with two invisible beams, and utilizes the photosensitive material to emit visible light, thus realizing the display of a three-dimensional spatial volume image. The three-dimensional spatial display device of the present invention improves the transparency and resolution of the three-dimensional spatial display image.

[0045] 2. The device of the present invention is simple to operate, has low manufacturing cost, and is suitable for widespread use. Attached Figure Description

[0046] Appendix Figure 1 This is a three-dimensional structural block diagram of Embodiment Six of the present invention.

[0047] Appendix Figure 2 This is a three-dimensional structural block diagram of Embodiment Seven of the present invention.

[0048] Appendix Figure 3 This is a three-dimensional structural block diagram of Embodiment 8 of the present invention.

[0049] Appendix Figure 4 This is a schematic diagram of calculating image projection slices in this invention.

[0050] Appendix Figure 5 This is a flowchart illustrating the working process of the present invention. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and examples. The illustrative embodiments and descriptions of this invention are only for explaining this invention and are not intended to limit this invention.

[0052] It should be noted that, unless otherwise specified, the features in the embodiments of this invention can be combined with each other.

[0053] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0054] Example 1:

[0055] A spatial three-dimensional display device based on a spatial volume screen with a light-emitting medium mainly comprises a spatial volume display carrier screen and a two-beam excitation light optical path system. The spatial volume display carrier screen is composed of a photosensitive material and a transparent container. The photosensitive material is distributed in the transparent container under the action of airflow. Of the two excitation light beams, one beam is a two-dimensional image projected by a projection device; the other beam is a line light source rotating around a center point. During the rotation, the line light source at different angles intersects with the projected two-dimensional image, exciting the photosensitive material to emit visible light, thereby displaying different two-dimensional images. Utilizing the persistence of vision phenomenon of the human eye, the two-dimensional images from multiple angles are superimposed to realize the spatial three-dimensional image display.

[0056] This embodiment is a spatial three-dimensional display device based on a light-emitting medium spatial volume screen, which improves the transparency and resolution of spatial three-dimensional display images.

[0057] Example 2

[0058] This embodiment is basically the same as Embodiment 1, except that:

[0059] The photosensitive material is doped with Er. 3+ NaYF4 solid particles or those whose main component is doped Er 3+ The solid particles of NaYF4 have a diameter of no more than 5000 μm.

[0060] Alternatively, the photosensitive material is Tm-doped. 3+ NaGdF4 solid particles or those mainly composed of doped Tm 3+The solid particles of NaGdF4 have a diameter of no more than 5000 μm.

[0061] Alternatively, the photosensitive material is doped with Er. 3+ NaGdF4 dissolved in oleic acid solution was atomized into an ultrasonic atomizing medium with a diameter of no more than 500 μm and distributed in a transparent container.

[0062] Alternatively, the photosensitive material is doped with Er. 3+ NaGdF4 dissolved in a cyclohexane solution was atomized into an ultrasonic atomizing medium with a diameter of no more than 500 μm and distributed in a transparent container.

[0063] Alternatively, the photosensitive material is doped with Er. 3+ NaGdF4 dissolved in chloroform solution was atomized into an ultrasonic atomizing medium with a diameter of no more than 500 μm and distributed in a transparent container.

[0064] Alternatively, the photosensitive material is Tm-doped. 3+ NaGdF4 dissolved in oleic acid solution was atomized into an ultrasonic atomizing medium with a diameter of no more than 500 μm and distributed in a transparent container.

[0065] Alternatively, the photosensitive material is Tm-doped. 3+ NaGdF4 dissolved in a cyclohexane solution was atomized into an ultrasonic atomizing medium with a diameter of no more than 500 μm and distributed in a transparent container.

[0066] Alternatively, the photosensitive material is Tm-doped. 3+ NaGdF4 dissolved in chloroform solution was atomized into an ultrasonic atomizing medium with a diameter of no more than 500 μm and distributed in a transparent container.

[0067] Alternatively, the photosensitive material is doped with Er. 3+ NaGdF4 solid particles or those mainly composed of Er-doped particles 3+ Solid particles of NaGdF4 with a diameter of no more than 5000 μm are distributed in water and circulate in a transparent container.

[0068] Alternatively, the photosensitive material is Tm-doped. 3+ NaGdF4 solid particles or those mainly composed of doped Tm 3+ Solid particles of NaGdF4 with a diameter of no more than 5000 μm are distributed in water and circulate in a transparent container.

[0069] Alternatively, the photosensitive material is doped with Er. 3+ NaGdF4 solid particles or those mainly composed of Er-doped particles 3+Solid particles of NaGdF4 with a diameter of no more than 5000 μm are distributed in oleic acid and circulated in a transparent container.

[0070] Alternatively, the photosensitive material is doped with Er. 3+ NaGdF4 solid particles or those mainly composed of Er-doped particles 3+ Solid particles of NaGdF4, with a diameter not exceeding 5000 μm, are distributed in cyclohexane and circulated in a transparent container.

[0071] Alternatively, the photosensitive material is doped with Er. 3+ NaGdF4 solid particles or those mainly composed of Er-doped particles 3+ Solid particles of NaGdF4 with a diameter not exceeding 5000 μm are distributed in chloroform and circulated in a transparent container.

[0072] Alternatively, the photosensitive material is Tm-doped. 3+ NaGdF4 solid particles or those mainly composed of doped Tm 3+ Solid particles of NaGdF4 with a diameter of no more than 5000 μm are distributed in oleic acid and circulated in a transparent container.

[0073] Alternatively, the photosensitive material is Tm-doped. 3+ NaGdF4 solid particles or those mainly composed of doped Tm 3+ Solid particles of NaGdF4, with a diameter not exceeding 5000 μm, are distributed in cyclohexane and circulated in a transparent container.

[0074] Alternatively, the photosensitive material is Tm-doped. 3+ NaGdF4 solid particles or those mainly composed of doped Tm 3+ Solid particles of NaGdF4, with a diameter not exceeding 5000 μm, are distributed in chloroform and circulated in a transparent container.

[0075] This embodiment uses a variety of photosensitive materials to emit visible light, thereby realizing the display of three-dimensional spatial volume images; this embodiment of the spatial three-dimensional display device improves the transparency and resolution of spatial three-dimensional display images.

[0076] Example 3

[0077] This embodiment is basically the same as the above embodiments, except that:

[0078] A spatial three-dimensional display device based on a light-emitting medium spatial volume screen includes a first excitation light source, a second excitation light source, a transparent container, and a photosensitive material, and further includes:

[0079] Dynamic beam expander: Located below the first laser source, used to control the beam diameter of the first laser source in real time;

[0080] Rotating lens group: Located below the dynamic beam expander, used to convert the light spot into a line light source; when the rotating lens group rotates, the line light source is also modulated into a line light source at different angles;

[0081] Transmission device: transmits power to the rotating lens group;

[0082] Electric motor: used to drive the transmission device;

[0083] Angle sensor: Located below the transmission device, used to detect the rotation angle of the transmission device;

[0084] Projection device: used to output two-dimensional images;

[0085] Controller: Used to receive the angle sensor signal and send control signals to the projection device;

[0086] Auxiliary device: located inside the transparent container;

[0087] Flow stabilizing device: located inside the transparent container.

[0088] This embodiment of the spatial three-dimensional display device improves the transparency and resolution of spatial three-dimensional display images.

[0089] Example 4

[0090] This embodiment is basically the same as the above embodiments, except that:

[0091] The first excitation light source outputs infrared laser light in the wavelength range of 800nm-2000nm; the second excitation light source outputs infrared laser light in the wavelength range of 800nm-2000nm. These provide the primary light source for the projection device.

[0092] Example 5

[0093] This embodiment is basically the same as the above embodiments, except that:

[0094] The auxiliary device is a fan motor, located at the bottom of the transparent container; the flow stabilizing device is located inside the transparent container, above the fan motor, and is used to stabilize the airflow of the fan motor.

[0095] Alternatively, the auxiliary device is an atomizer located at the bottom of the transparent container; the flow stabilizing device is located inside the transparent container, above the atomizer, and is used to stabilize the size of the mist generated by the atomizer.

[0096] Alternatively, the transparent container has a circulation branch; the auxiliary device is a liquid pump located in the circulation branch of the transparent container; the flow stabilizing device is located at the bottom of the transparent container and is used to stabilize the water flow rate of the liquid pump.

[0097] This embodiment employs different component selections to meet various needs in order to improve the transparency and resolution of spatial three-dimensional display images.

[0098] Example 6

[0099] This embodiment is basically the same as the above embodiments, except that:

[0100] See attached document Figure 1 , attached Figure 4 A spatial three-dimensional display device based on a spatial volume screen with a light-emitting medium includes 1-1: a first excitation light source; 1-2: a second excitation light source; 2: a dynamic beam expander; 3: a rotating lens group; 4: a transmission device; 5: a motor; 6: an angle sensor; 7: a projection device; 8: a controller; 9: a spatial volume display carrier screen; 10: an auxiliary device; and 11: a current stabilizing device.

[0101] The first excitation light source 1-1 outputs a laser beam in the wavelength range of 800nm-2000nm. The diameter of the laser beam is changed in real time by the dynamic beam expander 2, and then formed into line light sources of different lengths by the rotating lens 3.

[0102] In some possible implementations, the dynamic beam expander 2 and the rotating lens group 3 may be interchanged.

[0103] Preferably, the rotating lens group 3 consists of two cylindrical lenses with different focal lengths.

[0104] In some possible implementations, the rotating lens group 3 may be a rotating linear aperture.

[0105] When the rotating lens group 3 rotates, the different angles of the lens group result in different directions of contraction of the laser spot, thus forming line light source slices at different angles.

[0106] The rotating lens group 3 and the transmission device 4 form a transmission mechanism, such as gear transmission, belt transmission, chain transmission, etc.

[0107] The transmission device 4 is driven by an electric motor 5. An angle sensor 6 is placed below the transmission device 4 to detect the rotation angle of the transmission device 4.

[0108] The second excitation light source 1-2 outputs a laser beam in the wavelength range of 800nm-2000nm to provide the original light source for the projection device 7.

[0109] The projection device 7 is a light field modulation device, which modulates the output image.

[0110] The controller 8 is used to receive and output signals from the angle sensor 6 and the projection device 7.

[0111] According to a first embodiment of the present invention, the spatial volume display carrier screen includes a transparent container 91-1 and a photosensitive material 91-2;

[0112] Preferably, the photosensitive material 91-2 is doped with Er. 3+ or Tm 3+ NaGdF4 solid particles with a diameter of less than 5000 μm;

[0113] Preferably, the photosensitive material 91-2 may also be mainly composed of Er-doped materials. 3+ or Tm 3+ Solid particles of NaGdF4 with a diameter of less than 5000 μm;

[0114] According to a first embodiment of the present invention, the auxiliary device 10 is a fan located at the bottom of the transparent container 91-1, used to distribute the solid particle photosensitive material 91-2 in the transparent container 91-1. The flow stabilizing device 11 is located above the auxiliary device 10, and its function is to make the airflow of the auxiliary device 10 uniform, thereby making the photosensitive material 91-2 uniformly distributed in the transparent container 91-1.

[0115] Example 7

[0116] This embodiment is basically the same as the above embodiments, except that:

[0117] The spatial volume display carrier screen includes a transparent container 92-1 and a photosensitive material 92-2;

[0118] Preferably, the photosensitive material 92-2 is doped with Er. 3+ or Tm 3+ A solution of NaGdF4 dissolved in an organic solvent, an ultrasonic atomizing medium with a diameter of less than 500 μm;

[0119] Preferably, the organic solvent is oleic acid, cyclohexane, or chloroform.

[0120] The auxiliary device 10 is an atomizer located at the bottom of the transparent container 92-1, used to distribute the solid particles of photosensitive material 92-2 within the transparent container 92-1; the flow stabilizing device 11 is located above the auxiliary device 10, its function being to ensure uniform distribution of the droplets generated by the auxiliary device 10, thereby ensuring uniform distribution of the photosensitive material 92-2 within the transparent container 92-1.

[0121] Example 8

[0122] This embodiment is basically the same as the above embodiments, except that:

[0123] The spatial volume display carrier screen includes a transparent container 93-1 and a photosensitive material 93-2;

[0124] Preferably, the photosensitive material 93-2 is doped with Er. 3+ or Tm 3+ NaGdF4 solid particles with a diameter of less than 5000 μm are distributed in water;

[0125] Preferably, the photosensitive material 93-2 may also be mainly composed of Er-doped materials. 3+ or Tm 3+ Solid particles of NaGdF4 with a diameter of less than 5000 μm are distributed in water;

[0126] Preferably, the photosensitive material 93-2 may also be mainly composed of Er-doped materials. 3+ or Tm 3+ Solid particles of NaGdF4, with a diameter of less than 5000 μm, are distributed in oleic acid;

[0127] Preferably, the photosensitive material 93-2 may also be mainly composed of Er-doped materials. 3+ or Tm 3+ Solid particles of NaGdF4, with a diameter of less than 5000 μm, are distributed in cyclohexane;

[0128] Preferably, the photosensitive material 93-2 may also be mainly composed of Er-doped materials. 3+ or Tm 3+ Solid particles of NaGdF4, with a diameter of less than 5000 μm, are distributed in chloroform;

[0129] The auxiliary device 10 is a liquid pump located in the circulation branch of the transparent container 94-1, used to circulate the photosensitive material 93-2 mixed in water in the transparent container 93-1; the flow stabilizing device 11 is located at the bottom of the transparent container 93-1, and its function is to make the photosensitive material 93-2 evenly distributed in the water.

[0130] Example 9

[0131] This embodiment is basically the same as the above embodiments, except that:

[0132] See attached document Figure 1 Appendix Figure 2 and attached Figure 3 Three embodiments of the present invention, and appendix Figure 5 The system operation flowchart of the present invention is as follows: The working process and implementation principle of the entire system are as follows:

[0133] First, a three-dimensional object in space is divided into several two-dimensional image slices along its center line at a certain angle. The projected images of the divided two-dimensional image slices on the projection plane of the projection device 7 are calculated and arranged according to the angle as the output image sequence of the projection device 7.

[0134] See attached document Figure 4 A cylinder is divided into several sheet-like two-dimensional image sections along its center line O-O' at an angle α. The projection image S' of each image section S on the projection plane P is calculated according to the angle sequence. The calculated projection image is used as the output image sequence of the projection device 7.

[0135] The smaller the division angle α, the more image slices are divided, and the more detailed the displayed three-dimensional spatial image.

[0136] Secondly, the angle position of the transmission device 4 is detected by the angle sensor 6, and the angle position of the rotating lens group 3 is calculated based on the transmission relationship between the transmission device 4 and the rotating lens group 3, and then transmitted to the controller 8.

[0137] Finally, the controller 8 controls the projection device 7 to output the projected image corresponding to the angular position of the rotating lens group 3. The projected image intersects with the line light source slice formed by the rotating lens group 3, which excites the photosensitive materials 91-2, 92-2 and 93-2 in the spatial volume display carrier screen 9 to emit visible light, thereby displaying a two-dimensional image slice of a three-dimensional object in space at one angle.

[0138] By continuously changing the angle of the line light source slice by rotating lens group 3, projection device 7 synchronously outputs a two-dimensional image at the corresponding angle. Utilizing the persistence of vision effect of the human eye, a three-dimensional spatial image can be displayed on the spatial volume display carrier screen 9 by superimposing the two-dimensional images.

[0139] In summary, this invention relates to a spatial three-dimensional display device based on a luminescent medium spatial volume screen. It comprises a spatial volume display carrier screen and an excitation light optical path system. The spatial volume display carrier screen is composed of a photosensitive material and a transparent container. The photosensitive material is an upconversion material, a type of stimulated light, and is distributed within the transparent container. The excitation light optical path system includes two invisible excitation beams: one beam is a two-dimensional image projected by a projection device; the other beam is a line light source rotating around a center point. During rotation, the line light source at different angles intersects with the projected two-dimensional image, exciting the photosensitive material to emit visible light, thereby displaying different two-dimensional images. Utilizing the persistence of vision phenomenon in the human eye, multiple two-dimensional images are superimposed to achieve spatial three-dimensional image display. This spatial three-dimensional display device based on a luminescent medium spatial volume screen achieves spatial volume three-dimensional image display by using two invisible beams to jointly excite the photosensitive material, which then emits visible light.

[0140] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made according to the purpose of the invention. Any changes, modifications, substitutions, combinations or simplifications made based on the spirit and principle of the technical solution of the present invention shall be equivalent substitutions. As long as they meet the purpose of the invention and do not deviate from the technical principle and inventive concept of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A spatial three-dimensional display device based on a spatial volume screen with a light-emitting medium, characterized in that, The system mainly comprises a spatial volume display carrier screen and a two-beam excitation light optical path system. The spatial volume display carrier screen is composed of photosensitive material and a transparent container. The photosensitive material is distributed in the transparent container under the action of airflow. Of the two excitation light beams, one beam is a two-dimensional image projected by a projection device; the other beam is a line light source rotating around a center point. During the rotation, the line light source at different angles intersects with the projected two-dimensional image, exciting the photosensitive material to emit visible light, thereby displaying different two-dimensional images. By utilizing the persistence of vision phenomenon of the human eye, two-dimensional images from multiple angles are superimposed to realize the display of a three-dimensional spatial image. The spatial three-dimensional display device based on a light-emitting medium spatial volume screen further includes: Dynamic beam expander: Located below the line light source rotating around the center point, used to control the beam diameter of the line light source rotating around the center point in real time; Rotating lens group: Located below the dynamic beam expander, used to convert the light spot into a line light source; when the rotating lens group rotates, the line light source is also modulated into a line light source at different angles; Transmission device: transmits power to the rotating lens group; Electric motor: used to drive the transmission device; Angle sensor: Located below the transmission device, used to detect the rotation angle of the transmission device; Projection device: used to output two-dimensional images; Controller: Used to receive the angle sensor signal and send control signals to the projection device; Auxiliary device: located inside the transparent container; the auxiliary device ensures that the photosensitive material is evenly distributed within the transparent container; Flow stabilizing device: located inside the transparent container.

2. The spatial three-dimensional display device based on a light-emitting medium spatial volume screen according to claim 1, characterized in that: The photosensitive material is doped with Er. 3+ NaYF4 solid particles or those whose main component is doped Er 3+ The solid particles of NaYF4 have a diameter of no more than 5000 μm.

3. The spatial three-dimensional display device based on a light-emitting medium spatial volume screen according to claim 1, characterized in that: The photosensitive material is Tm-doped. 3+ NaGdF4 solid particles or those mainly composed of doped Tm 3+ The solid particles of NaGdF4 have a diameter of no more than 5000 μm.

4. The spatial three-dimensional display device based on a light-emitting medium spatial volume screen according to claim 1, characterized in that: The photosensitive material is doped with Er. 3+ NaGdF4 dissolved in oleic acid solution was atomized into an ultrasonic atomizing medium with a diameter of no more than 500 μm and distributed in a transparent container. Alternatively, the photosensitive material is doped with Er. 3+ NaGdF4 dissolved in a cyclohexane solution was atomized into an ultrasonic atomizing medium with a diameter of no more than 500 μm and distributed in a transparent container. Alternatively, the photosensitive material is doped with Er. 3+ NaGdF4 dissolved in chloroform solution was atomized into an ultrasonic atomizing medium with a diameter of no more than 500 μm and distributed in a transparent container. Alternatively, the photosensitive material is Tm-doped. 3+ NaGdF4 dissolved in oleic acid solution was atomized into an ultrasonic atomizing medium with a diameter of no more than 500 μm and distributed in a transparent container. Alternatively, the photosensitive material is Tm-doped. 3+ NaGdF4 dissolved in a cyclohexane solution was atomized into an ultrasonic atomizing medium with a diameter of no more than 500 μm and distributed in a transparent container. Alternatively, the photosensitive material is Tm-doped. 3+ NaGdF4 dissolved in chloroform solution was atomized into an ultrasonic atomizing medium with a diameter of no more than 500 μm and distributed in a transparent container.

5. The spatial three-dimensional display device based on a light-emitting medium spatial volume screen according to claim 1, characterized in that: The photosensitive material is doped with Er. 3+ NaGdF4 solid particles or those mainly composed of Er-doped particles 3+ Solid particles of NaGdF4 with a diameter of no more than 5000 μm are distributed in water and circulate in a transparent container. Alternatively, the photosensitive material is Tm-doped. 3+ NaGdF4 solid particles or those mainly composed of doped Tm 3+ Solid particles of NaGdF4 with a diameter of no more than 5000 μm are distributed in water and circulate in a transparent container. Alternatively, the photosensitive material is doped with Er. 3+ NaGdF4 solid particles or those mainly composed of Er-doped particles 3+ Solid particles of NaGdF4 with a diameter of no more than 5000 μm are distributed in oleic acid and circulated in a transparent container. Alternatively, the photosensitive material is doped with Er. 3+ NaGdF4 solid particles or those mainly composed of Er-doped particles 3+ Solid particles of NaGdF4, with a diameter not exceeding 5000 μm, are distributed in cyclohexane and circulated in a transparent container. Alternatively, the photosensitive material is doped with Er. 3+ NaGdF4 solid particles or those mainly composed of Er-doped particles 3+ Solid particles of NaGdF4 with a diameter not exceeding 5000 μm are distributed in chloroform and circulated in a transparent container. Alternatively, the photosensitive material is Tm-doped. 3+ NaGdF4 solid particles or those mainly composed of doped Tm 3+ Solid particles of NaGdF4 with a diameter of no more than 5000 μm are distributed in oleic acid and circulated in a transparent container. Alternatively, the photosensitive material is Tm-doped. 3+ NaGdF4 solid particles or those mainly composed of doped Tm 3+ Solid particles of NaGdF4, with a diameter not exceeding 5000 μm, are distributed in cyclohexane and circulated in a transparent container. Alternatively, the photosensitive material is Tm-doped. 3+ NaGdF4 solid particles or those mainly composed of doped Tm 3+ Solid particles of NaGdF4, with a diameter not exceeding 5000 μm, are distributed in chloroform and circulated in a transparent container.

6. The spatial three-dimensional display device based on a light-emitting medium spatial volume screen according to claim 1, characterized in that: The first excitation light source outputs infrared laser light in the wavelength range of 800nm-2000nm; the second excitation light source outputs infrared laser light in the wavelength range of 800nm-2000nm.

7. The spatial three-dimensional display device based on a light-emitting medium spatial volume screen according to claim 1, characterized in that: The auxiliary device is a fan motor, located at the bottom of the transparent container; the flow stabilizing device is located inside the transparent container, above the fan motor, and is used to stabilize the airflow of the fan motor.

8. The spatial three-dimensional display device based on a light-emitting medium spatial volume screen according to claim 1, characterized in that: The auxiliary device is an atomizer, located at the bottom of the transparent container; the flow stabilizing device is located inside the transparent container, above the atomizer, and is used to stabilize the size of the mist generated by the atomizer.

9. The spatial three-dimensional display device based on a light-emitting medium spatial volume screen according to claim 1, characterized in that: The transparent container has a circulation branch; the auxiliary device is a liquid pump, located in the circulation branch of the transparent container; The flow stabilizing device is located at the bottom of the transparent container and is used to stabilize the water flow rate of the liquid pump.

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