CN115421313A - A true three-dimensional stereoscopic color display system and display method based on full-color up-conversion luminescence nanodisplay - Google Patents

Abstract

The invention discloses a true three-dimensional stereoscopic color display system and a display method based on a full-color up-conversion light-emitting nano-display, belonging to the technical field of three-dimensional display. The display system consists of a full-color up-conversion light-emitting nano-display, an optical lens group, three Composed of lasers with different wavelengths and laser scanners; full-color up-conversion luminescent nanodisplays are prepared by doping or copolymerization methods by using a ternary orthogonal excitation emission system as a luminescent medium and a polymer material as a three-dimensional display solid medium; The meta-orthogonal excitation and emission system can produce independent and non-interfering red, green, and blue primary color luminescence. By adjusting the excitation power of the three laser beams, full-color up-conversion luminescence can be generated inside the display; the laser scanner is used to receive The stereoscopic image data output by the 3D modeling software controls the laser convergence point to perform addressing and scanning in the three directions of the X-axis, Y-axis, and Z-axis in the display to realize the three-dimensional image display composed of nano-body pixels.

Description

A true three-dimensional stereoscopic color display based on a full-color up-conversion luminescent nanodisplay System and display method thereof

technical field

The invention belongs to the technical field of three-dimensional display, and in particular relates to a true three-dimensional stereoscopic color display system and a display method thereof based on a full-color up-conversion light-emitting nanometer display.

Background technique

We live in a three-dimensional space, and the eyes' perception of the real world is often three-dimensional information. However, as the perceiver of the three-dimensional world, about 70% of the visual information that humans acquire is based on two-dimensional planes, including pictures, paintings, videos, etc. These plane information based on two-dimensional display technology cannot satisfy the information processing mechanism of the human brain. The habit of information processing, the human brain needs to obtain "full information" of real objects from a three-dimensional perspective.

With the continuous development of science and technology, three-dimensional display technology gradually appears in the eyes of the public. Especially when the world's first 3D movie "Avatar" was released in 2009, its vivid and lifelike 3D stereoscopic vision quickly attracted people's attention, and everyone's interest in 3D display has become increasingly strong. In recent years, due to the characteristics of large amount of information, full view, multi-angle, and three-dimensional visual effects, 3D display technology has shown broad application prospects in the fields of medical treatment, military affairs, education, and daily life. At present, commonly used 3D display technologies on the market, such as spectroscopic stereoscopic display and holographic 3D display, etc., mainly form a pseudo-visual 3D space through human binocular parallax or psychological depth hints. However, these unnatural-based virtual 3D stereoscopic effects are not true 3D stereoscopic displays in fact, because they cannot provide physical depth of field and do not have a complete physical depth hint. And this kind of virtual three-dimensional sense usually requires the help of vision aids such as glasses and helmets, which can easily cause headaches, visual fatigue, and illusions for a long time. Therefore, developing a true three-dimensional display technology with real physical depth is of great value and significance to the development of the display field.

The main principle adopted by the true three-dimensional stereoscopic display system is the optical frequency up-conversion technology. This display method has shown great application potential in the display field due to its advantages of materialization, high resolution, and fast operation speed. In the past few decades, various rare earth doped materials based on optical frequency upconversion have been applied in 3D display technology. Although great progress has been made in the research of 3D stereoscopic display based on optical frequency up-conversion technology, researchers have not solved the crosstalk of excitation light, harmful energy transfer and multicolor luminescence interference caused by the co-doping of various rare earth luminescent ions. How to solve the problem of low imaging resolution has become the key to overcome the true three-dimensional display technology.

Contents of the invention

Aiming at the problems of excitation light crosstalk, unnecessary energy transfer, multi-color luminescent mutual interference, and low resolution of three-dimensional display imaging faced by rare earth doped materials in the prior art, the purpose of the present invention is to provide a A true three-dimensional stereoscopic color display system and a display method thereof for a color-up-conversion luminescent nanometer display, the display system adopts a three-dimensional display solid medium based on a ternary orthogonal excitation-emission system as a display, and the ternary orthogonal excitation-emission system is composed of The multi-layer core-shell structure up-conversion nanocrystals with vertical excitation response and orthogonal trichromatic emission characteristics; in the ternary orthogonal excitation and emission system, the trichromatic luminescent nanolayers (cores) can only respond to specific wavelengths of near-infrared light excitation respectively. , where the blue light-emitting nucleus responds to 980nm excitation, the red light-emitting layer responds to 1560nm excitation, and the green light-emitting layer responds to 808nm excitation; and the three light-emitting processes in the same nanomaterial are independent of each other and do not interfere with each other; thus, it is possible to obtain Multi-color up-conversion luminescence with high brightness and high color purity can improve the imaging resolution of 3D display.

The present invention realizes through following technical scheme:

In the first aspect, the present invention provides a true three-dimensional color display system based on a full-color up-conversion luminescent nano-display, including a full-color up-conversion luminescent nano-display, an optical lens group, three lasers with different wavelengths, and a laser scanner; The optical lens group includes a laser collimator lens, a telephoto lens and two dichroic mirrors. The laser light emitted by the three different wavelength lasers is collimated sequentially through the laser collimator lens and the convex lens of the corresponding wavelength. The last two laser beams are combined through one of the dichroic mirrors at an incident angle of 45 degrees, and the combined laser beams are combined with the third laser beam through another dichroic mirror at an incident angle of 45 degrees. The three beams of laser light after the beam are converged at the fixed-point position in the three-dimensional space of the full-color up-conversion luminescent nano-display through the telephoto lens; the full-color up-conversion luminescent nano-display is fixed on the laser scanner, and the laser scanner is used to The set stereoscopic image data controls the scanning of the laser convergence point in the three directions of X-axis, Y-axis and Z-axis on the full-color up-conversion luminescent nano-display, and utilizes the persistence effect of human vision to obtain countless A dynamic three-dimensional display image composed of nanobody pixels.

Further, the focal length of the convex lens is 25 mm, the focal length of the telephoto lens is 10 cm, and the dichroic mirror is a 980/808 nm dichroic mirror or a 980/808/1560 nm dichroic mirror.

Further, the three lasers with different wavelengths are 980nm laser, 808nm laser and 1560nm laser respectively.

Furthermore, the full-color up-conversion luminescent nanodisplay is a nano-based nano-display with high transparency prepared by a ternary orthogonal excitation emission system as a luminescent medium, a polymer material as a three-dimensional display solid medium, and a method of doping or copolymerization. Full-color upconversion luminescent nanodisplays from crystal/polymer composites.

Further, the polymer material is epoxy resin, polymethylmethacrylate or polydimethylsiloxane.

Further, the ternary orthogonal excitation emission system is prepared by the following method, which specifically includes the following steps:

First, the blue light-emitting core NaYF ₄ :Yb/Tm nanocrystals were prepared by thermal co-precipitation method, and then the prepared core nanocrystals were used as seeds to induce the growth of the epitaxial NaYF ₄ inert shell layer, and then the prepared NaYF ₄ :Yb /Tm@NaYF ₄ core-shell structure nanocrystals are used as seeds to induce the growth of the epitaxial red light emitting layer NaYF ₄ :Er/Ho, and the prepared double-layer core-shell structure nanocrystals are also used as seeds to induce the epitaxy of the NaYF ₄ inert shell layer The growth of the prepared three-layer core-shell structure nanocrystal is used as the seed crystal to induce the growth of the epitaxial green light-emitting layer NaYF ₄ :Nd/Yb/Er layer, and finally the four-layer core-shell structure nanocrystal is used as the seed crystal to induce the epitaxy NaYF ₄ : Growth of Nd layer; prepared ternary orthogonal excitation emission system based on five-layer core-shell nanocrystals.

Further, the full-color up-conversion light-emitting nano-display is prepared by the following method, which specifically includes the following steps:

Add 40 mg/mL ternary orthogonal excitation emission system and cyclohexane solution into the epoxy resin at a volume ratio of 1:10, stir at room temperature for 20 minutes, and then sequentially add 2% organosilicon dispersant Foam agent and polyamide curing agent with a volume fraction of 10%, ultrasonically vibrate the obtained dispersion for 30 minutes to disperse evenly, and then inject it into a transparent silicone mold through a syringe, and wait until the dispersion is completely cured to obtain a full-color up-conversion luminescent nanometer monitor.

Further, the full-color up-conversion light-emitting nano-display is prepared by the following method, which specifically includes the following steps:

Add 0.02g initiator azobisisobutyronitrile and 9g monomer methyl methacrylate into 4mL ethyl acetate, then heat to 60°C for 70 minutes, after the low-temperature prepolymerization reaction is completed, add 1mL containing 20mg three Ethyl acetate solution of element orthogonal excitation emission system, then heat up to 82°C for high-temperature polymerization, wait until the reaction liquid is transparent and viscous, stop the reaction and transfer it to a glass mold, and finally heat it in a vacuum drying oven to Keep at 120°C for 24 hours to complete high-temperature curing, and a full-color up-conversion luminescent nanometer display can be obtained after the reaction is completed.

In the second aspect, the present invention also provides a display method of a true three-dimensional color display system based on a full-color up-conversion light-emitting nano-display, which specifically includes the following steps:

Step 1: emit laser light through lasers with wavelengths of 980nm, 808nm and 1560nm, and the laser light is collimated through the laser collimating lens and convex lens of the corresponding wavelength in turn, and the collimated 980nm and 808nm lasers first pass through the 980/808nm dichroic mirrors combine beams, and the combined 980/808nm laser beams are combined with 1560nm laser beams through 980/808/1560nm dichroic mirrors along an incident angle of 45 degrees. After beam combining, the three laser beams Finally, the telephoto lens converges at the fixed point in the three-dimensional space of the full-color up-conversion light-emitting nano-display, and by adjusting the excitation power of the three laser beams, blue, cyan, yellow, red, pink, white, and green full-color up-converting can be generated inside the display. convert luminescence;

Step 2: Output the stereoscopic image data through the 3D modeling software, use the main controller of the laser scanner to receive the signal, and control the laser convergence point through the laser scanner, and carry out the three directions of the X-axis, Y-axis, and Z-axis on the display. The addressing scan, using the persistence effect of human vision, can obtain the display of a three-dimensional image composed of countless nano-body pixels.

Further, by adjusting the excitation power of the three laser beams, the adjustment of full-color up-conversion luminescence of blue, cyan, yellow, red, pink, white, and green (from left to right as shown in Figure 2) can be realized; the specific adjustment scheme as follows:

When the excitation power of the 808nm laser is 0.0W, the excitation power of the 980nm laser is 0.5W, and the current of the 1560nm laser is 0.0A, blue up-conversion luminescence is produced;

When the excitation power of the 808nm laser is 0.8W, the excitation power of the 980nm laser is 1.1W, and the current of the 1560nm laser is 0.0A, cyan upconversion light is produced;

When the excitation power of the 808nm laser is 1.5W, the excitation power of the 980nm laser is 0.0W, and the current of the 1560nm laser is 1.8A, yellow up-conversion luminescence is produced;

When the excitation power of the 808nm laser is 0.0W, the excitation power of the 980nm laser is 0.0W, and the current of the 1560nm laser is 1.6A, red up-conversion luminescence is produced;

When the excitation power of the 808nm laser is 0.0W, the excitation power of the 980nm laser is 0.5W, and the current of the 1560nm laser is 2.0A, pink up-conversion luminescence is produced;

When the excitation power of the 808nm laser is 1.1W, the excitation power of the 980nm laser is 2.5W, and the current of the 1560nm laser is 1.2A, white up-conversion luminescence is produced;

When the excitation power of the 808nm laser is 1.0W, the excitation power of the 980nm laser is 0.0W, and the current of the 1560nm laser is 0.0A, green up-conversion luminescence is generated.

Compared with prior art, advantage of the present invention is as follows:

A true three-dimensional stereoscopic color display system and display method based on full-color up-conversion luminescent nanodisplays of the present invention, the display system uses a three-dimensional display solid medium based on a ternary orthogonal excitation-emission system as a display, and the same nanomaterials The three luminous processes are independent of each other and do not interfere with each other; full-color up-conversion luminescence with high brightness and high color purity can be obtained, thereby generating dynamic true three-dimensional color stereoscopic images and videos with nanoscale resolution, with display effects Realistic, large amount of display information, high resolution of display imaging, etc. The related display method is a dynamic display based on the persistence effect of human eyes, and has the characteristics of consuming less hardware resources, convenient software control, low price and the like.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that are required in the description of the specific embodiments or the prior art. Throughout the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, elements or parts are not necessarily drawn in actual scale.

Fig. 1: the transmission electron microscope (TEM) photograph of the ternary orthogonal excitation emission system prepared in Example 2 of the present invention;

Fig. 2: The luminescent photo of the ternary orthogonal excitation-emission system prepared in Example 2 of the present invention under the beam-combined excitation of three different wavelengths of near-infrared light (1560/980/808nm);

Figure 3: The physical picture of the full-color up-conversion luminescence nanodisplay based on the ternary orthogonal excitation emission system prepared in Example 2 of the present invention;

Figure 4: Schematic diagram of the structure of a true three-dimensional color display system based on a full-color up-conversion light-emitting nanodisplay according to Embodiment 1 of the present invention;

Fig. 5: The actual figure of the real three-dimensional color display system based on full-color up-conversion light-emitting nano-display according to Embodiment 1 of the present invention;

Fig. 6: A color true three-dimensional stereoscopic display image generated by the true three-dimensional stereoscopic color display system based on the full-color up-conversion light-emitting nanodisplay according to Embodiment 2 of the present invention.

detailed description

In order to clearly and completely describe the technical solution of the present invention and its specific working process, in conjunction with the accompanying drawings, the specific implementation of the present invention is as follows:

Example 1

As shown in Figure 5, this embodiment provides a true three-dimensional color display system based on a full-color up-conversion luminescent nano-display, including a full-color up-conversion luminescent nano-display, an optical lens group, a 980nm laser, an 808nm laser, and a 1560nm laser. And a laser scanner, the optical lens group specifically includes three groups of laser collimating lenses of 980nm, 808nm and 1560nm, a convex lens with a focal length of 25mm, a telephoto lens with a focal length of 10cm, a 980/808nm dichroic mirror, a 980/808/ 1560nm dichroic mirror. The display system outputs stereoscopic image data through 3D modeling software; uses the laser scanner main controller to receive signals; gathers two or three laser beams of any wavelength in 980nm, 808nm or 1560nm on the full-color up-conversion luminescent nanometer display Full-color up-conversion luminescence is generated at the fixed-point position; the laser scanner is programmed to control the laser convergence point to perform fast addressing and scanning in three-dimensional space in the display, and the dynamic three-dimensional with nanometer resolution can be obtained by using the persistence effect of human vision. Display images in stereo.

In this embodiment, the full-color up-conversion luminescent nanodisplay is prepared by a ternary orthogonal excitation emission system as a luminescent medium, a polymer material as a three-dimensional display solid medium, and has high transparency by doping or copolymerization. A full-color up-conversion luminescence nanodisplay based on nanocrystal/polymer composite material; wherein, the polymer material is epoxy resin, polymethyl methacrylate or polydimethylsiloxane.

The working principle of a true three-dimensional stereoscopic color display system based on a full-color up-conversion light-emitting nano-display in this embodiment is as follows:

The display system converges two laser beams with any wavelength in 980nm, 808nm or 1560nm at a fixed point in the three-dimensional space of the full-color up-conversion luminescent nano-display. By selectively exciting the fixed-point position, up-conversion luminescence can be generated inside the display; the nanocrystal at the fixed-point light-emitting position is equivalent to a nanobody pixel, and the rapid three-dimensional image search of the stereoscopic image can be performed in the display by programmatically controlling the laser convergence point. Site scanning, using the persistence effect of human vision, can obtain a dynamic three-dimensional display image composed of countless nano-body pixels.

Example 2

This embodiment provides a method for preparing a full-color up-conversion luminescent nanodisplay, which specifically includes the following steps:

Step 1: Preparation of ternary orthogonal excitation emission system:

(1) Preparation of blue light-emitting nucleus NaYF ₄ :Yb/Tm nanocrystals: Rare earth salt YCl ₃ 6H ₂ O (0.2mmol), YbCl ₃ 6H ₂ O (0.196mmol ) and TmCl ₃ ·6H ₂ O (0.004mmol) were added to a mixed solvent of 3mL oleic acid and 7mL octadecene, and heated to 150°C for 90 minutes to obtain the Y-Yb-Tm-OA oleic acid complex, which was cooled to After room temperature, add a methanol solution of 1.6mmol NH ₄ F and 1.0mmol NaOH as the fluorine source and sodium source respectively, and after the methanol volatilizes, heat to 290°C under the protection of an inert gas and react for 90 minutes to obtain nuclear nanocrystals;

(2) Preparation of the shell precursor: Add the rare earth salt required to wrap the shell into a mixed solvent of 3 mL oleic acid and 7 mL octadecene according to a predetermined ratio, and heat to 150 ° C for 60 minutes to obtain the first Y-OA, Y-Er-Ho, Y-OA, Nd-Yb-Er-OA, Y-Nd required for shell, second shell, third shell, fourth shell and fifth shell -OA oleic acid complex;

(3) Preparation of NaYF ₄ :Yb/Tm@NaYF ₄ core-shell structure nanocrystals: the prepared NaYF ₄ :Yb/Tm core nanocrystals were added as seed crystals to the shell precursor Y-OA oleic acid complex solution , then add a methanol solution in which the fluorine source and the sodium source are 1.6 mmol NH ₄ F and 1.0 mmol NaOH respectively, and after the methanol volatilizes, it is heated to 290°C under the protection of an inert gas and reacted for 90 minutes to obtain nanocrystals with a core-shell structure;

(4) Preparation of multilayer core-shell structure nanocrystals: methods for preparing double-shell, three-shell, four-shell and five-shell-coated core-shell structure nanocrystals and the above-mentioned preparation method for core-shell structure nanocrystals same. Just use the nanocrystals prepared in the previous step as seeds and add them to the precursor Y-Er-Ho, Y-OA, Nd-Yb-Er-OA or Y-Nd-OA oleic acid complex solution , then add a methanol solution of 1.6mmol NH ₄ F and 1.0mmol NaOH as a fluorine source and a sodium source respectively, and after the methanol volatilizes, heat it to 290°C under the protection of an inert gas and react for 90 minutes to obtain the corresponding double-layer and triple-layer , four-layer and five-layer coated multilayer core-shell structure nanocrystals.

Step 2: Prepare full-color up-conversion luminescent nanodisplays by doping or copolymerization:

(1) Doping method: Add 40mg/mL ternary orthogonal excitation emission system and cyclohexane solution into epoxy resin at a volume ratio of 1:10, stir at room temperature for 20 minutes, and then add the volume fraction 2% silicone defoamer and 10% polyamide curing agent by volume fraction, ultrasonically vibrate the obtained dispersion for 30 minutes to disperse evenly, then inject it into a transparent silicone mold through a syringe, and wait until the dispersion is completely cured, that is Obtain a full-color up-conversion luminescent nano-display;

(2) Copolymerization method: add 0.02g initiator azobisisobutyronitrile and 9g monomer methyl methacrylate into 4mL ethyl acetate, then heat to 60°C for 70 minutes, after the low temperature prepolymerization reaction is completed , add 1mL ethyl acetate solution containing 20mg ternary orthogonal excitation emission system, then raise the temperature to 82°C for high temperature polymerization, wait until the reaction liquid is transparent and viscous, stop the reaction and transfer it to a glass mold, and finally in Heating to 120° C. in a vacuum drying oven for 24 hours to complete high-temperature curing, and a full-color up-conversion luminescent nanometer display can be obtained after the reaction is completed.

Example 3

This embodiment provides a display method for a true three-dimensional color display system based on a full-color up-conversion luminescent nanodisplay, using an optical lens and a dichroic mirror to detect three beams of near-infrared light (1560/980/808nm) with different wavelengths. Combined beam modulation, by adjusting the excitation power of the three near-infrared excitation lights, at the converging point of the three-dimensional space area of the "full-color up-conversion luminescent nanodisplay" based on the three-element orthogonal excitation-emission system, the three-primary color principle can be generated. full-color up-conversion luminescence. The luminescent point is equivalent to the nanoscale volume pixel point, and the fast three-dimensional addressing scanning of the stereoscopic image by the laser scanner can obtain the color true three-dimensional display image and video with nanoscale resolution.

The display method specifically includes the following steps:

By adjusting the excitation power of the three beams of near-infrared excitation light at 1560/980/808nm, full-color upconversion luminescence can be produced in the ternary orthogonal excitation emission system prepared in Figure 1, as shown in Figure 2;

Specifically, by adjusting the excitation power of the three laser beams, the adjustment of full-color up-conversion luminescence of blue, cyan, yellow, red, pink, white, and green (from left to right) can be realized; the specific adjustment scheme is as follows:

When the excitation power of the 808nm laser is 0.0W, the excitation power of the 980nm laser is 0.5W, and the current of the 1560nm laser is 0.0A, blue up-conversion luminescence is produced;

When the excitation power of the 808nm laser is 0.8W, the excitation power of the 980nm laser is 1.1W, and the current of the 1560nm laser is 0.0A, cyan upconversion light is produced;

When the excitation power of the 808nm laser is 1.5W, the excitation power of the 980nm laser is 0.0W, and the current of the 1560nm laser is 1.8A, yellow up-conversion luminescence is produced;

When the excitation power of the 808nm laser is 0.0W, the excitation power of the 980nm laser is 0.0W, and the current of the 1560nm laser is 1.6A, red up-conversion luminescence is produced;

When the excitation power of the 808nm laser is 0.0W, the excitation power of the 980nm laser is 0.5W, and the current of the 1560nm laser is 2.0A, pink up-conversion luminescence is produced;

When the excitation power of the 808nm laser is 1.1W, the excitation power of the 980nm laser is 2.5W, and the current of the 1560nm laser is 1.2A, white up-conversion luminescence is produced;

When the excitation power of the 808nm laser is 1.0W, the excitation power of the 980nm laser is 0.0W, and the current of the 1560nm laser is 0.0A, green up-conversion luminescence is generated.

The ternary orthogonal excitation emission system prepared in Fig. 1 is dispersed into a transparent three-dimensional display solid medium (epoxy resin, polymethyl methacrylate or polydimethylsiloxane) by doping or copolymerization to obtain A full-color up-conversion luminescent nanodisplay, as shown in Figure 3;

By building a true three-dimensional stereoscopic color display system, as shown in Figures 4 and 5, 3D modeling software is used to output stereoscopic image data, and three near-infrared beams of different wavelengths are analyzed by a collimator lens, a convex lens, a telephoto lens, and a dichroic mirror. The light (1560/980/808nm) is beam-combined and modulated, and converged at the fixed-point position of the full-color up-conversion luminescent nano-display, and the main controller of the laser scanner is used to receive the data signal and control the laser convergence point in the display for X X-axis, Y-axis, and Z-axis fast addressing scanning, using the persistence effect of human vision, can obtain a dynamic three-dimensional display image with nanometer resolution, as shown in Figure 6.

The preferred embodiment of the present invention has been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the specific details of the above embodiment, within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, These simple modifications all belong to the protection scope of the present invention.

In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way if there is no contradiction. The combination method will not be described separately.

In addition, various combinations of different embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims (10)

1. A true three-dimensional stereoscopic color display system based on full-color up-conversion light-emitting nano-displays, characterized in that, comprising full-color up-conversion light-emitting nano-displays, optical lens groups, lasers and laser scanners of three different wavelengths; The optical lens group includes a laser collimator lens, a convex lens, a telephoto lens and two dichroic mirrors. The lasers emitted by the three different wavelength lasers are collimated sequentially through the laser collimator lens and the convex lens of the corresponding wavelength. The last two laser beams are combined through one of the dichroic mirrors at an incident angle of 45 degrees, and the combined laser beams are combined with the third laser beam through another dichroic mirror at an incident angle of 45 degrees. The three beams of laser light after the beam are converged at the fixed-point position in the three-dimensional space of the full-color up-conversion luminescent nano-display through the telephoto lens; the full-color up-conversion luminescent nano-display is fixed on the laser scanner, and the laser scanner is used to The set stereoscopic image data is used to control the scanning of the laser convergence point in the three directions of X-axis, Y-axis, and Z-axis on the full-color up-conversion luminescent nano-display, and by using the persistence effect of human vision, countless A dynamic three-dimensional display image composed of nanobody pixels. 2. a kind of true three-dimensional stereoscopic color display system based on full-color up-conversion light-emitting nano-display as claimed in claim 1, is characterized in that, the focal length of described convex lens is 25mm, and the focal length of described telephoto lens is 10cm, so The dichroic mirror is a 980/808nm dichroic mirror or a 980/808/1560nm dichroic mirror. 3. A true three-dimensional color display system based on full-color up-conversion luminescent nanodisplays as claimed in claim 1, wherein the three lasers with different wavelengths are 980nm lasers, 808nm lasers and 1560nm lasers respectively. 4. A kind of true three-dimensional stereoscopic color display system based on full-color up-conversion luminescence nano-display as claimed in claim 1, it is characterized in that, described full-color up-conversion luminescence nano-display is made of ternary orthogonal excitation emission system as Luminescent medium, polymer material as a three-dimensional display solid medium, a full-color up-conversion luminescent nano-display based on nanocrystal/polymer composite material with high transparency prepared by doping or copolymerization. 5. A kind of true three-dimensional stereoscopic color display system based on full-color up-conversion luminescent nano-display as claimed in claim 1, it is characterized in that, described macromolecular material is epoxy resin, polymethyl methacrylate or polydimethacrylate Methylsiloxane. 6. A kind of true three-dimensional stereoscopic color display system based on full-color up-conversion luminescent nano-display as claimed in claim 1, it is characterized in that, described ternary orthogonal excitation emission system is prepared by following method, and described method is specific Including the following steps: First, the blue light-emitting core NaYF ₄ :Yb/Tm nanocrystals were prepared by thermal co-precipitation method, and then the prepared core nanocrystals were used as seeds to induce the growth of the epitaxial NaYF ₄ inert shell layer, and then the prepared NaYF ₄ :Yb /Tm@NaYF ₄ core-shell structure nanocrystals are used as seeds to induce the growth of the epitaxial red light emitting layer NaYF ₄ :Er/Ho, and the prepared double-layer core-shell structure nanocrystals are also used as seeds to induce the epitaxy of the NaYF ₄ inert shell layer The growth of the prepared three-layer core-shell structure nanocrystal is used as the seed crystal to induce the growth of the epitaxial green light-emitting layer NaYF ₄ :Nd/Yb/Er layer, and finally the four-layer core-shell structure nanocrystal is used as the seed crystal to induce the epitaxy NaYF ₄ : Growth of Nd layer; prepared ternary orthogonal excitation emission system based on five-layer core-shell nanocrystals. 7. A kind of true three-dimensional stereoscopic color display system based on a full-color up-conversion luminescent nano-display as claimed in claim 6, wherein the full-color up-conversion luminescent nano-display is prepared by the following method, and the method is specifically Including the following steps: Add 40 mg/mL ternary orthogonal excitation emission system and cyclohexane solution into the epoxy resin at a volume ratio of 1:10, stir at room temperature for 20 minutes, and then sequentially add 2% organosilicon dispersant Foam agent and polyamide curing agent with a volume fraction of 10%, ultrasonically vibrate the obtained dispersion for 30 minutes to disperse evenly, and then inject it into a transparent silicone mold through a syringe, and wait until the dispersion is completely cured to obtain a full-color up-conversion luminescent nanometer monitor. 8. A true three-dimensional color display system based on a full-color up-conversion luminescent nanodisplay as claimed in claim 6, wherein the full-color up-conversion luminescent nanodisplay is prepared by the following method, and the method is specifically Including the following steps: Add 0.02g initiator azobisisobutyronitrile and 9g monomer methyl methacrylate into 4mL ethyl acetate, then heat to 60°C for 70 minutes, after the low temperature prepolymerization reaction is completed, add 1mL containing 20mg Ethyl acetate solution of the element orthogonal excitation emission system, and then heated up to 82°C for high-temperature polymerization. After the reaction liquid was transparent and viscous, stop the reaction and transfer it to a glass mold, and finally heated it in a vacuum drying oven to Keep at 120°C for 24 hours to complete the high-temperature curing, and a full-color up-conversion luminescent nanometer display can be obtained after the reaction is completed. 9. The display method of a true three-dimensional color display system based on full-color up-conversion light-emitting nano-displays as claimed in claim 1, characterized in that, specifically comprising the following steps: Step 1: emit laser light through lasers with wavelengths of 980nm, 808nm and 1560nm, and the laser light is collimated through the laser collimating lens and convex lens of the corresponding wavelength in turn, and the collimated 980nm and 808nm lasers first pass through the 980/808nm dichroic mirrors combine beams, and the combined 980/808nm laser beams are combined with 1560nm laser beams through 980/808/1560nm dichroic mirrors along an incident angle of 45 degrees. After beam combining, the three laser beams Finally, the telephoto lens converges at the fixed point in the three-dimensional space of the full-color up-conversion light-emitting nano-display. color conversion luminescence; Step 2: Output the stereoscopic image data through the 3D modeling software, use the main controller of the laser scanner to receive the signal, and control the laser convergence point through the laser scanner, and carry out the three directions of the X-axis, Y-axis, and Z-axis on the display. The addressing scan, using the persistence effect of human vision, can obtain the display of a three-dimensional image composed of countless nano-body pixels. 10. A display method of a true three-dimensional color display system based on a full-color up-conversion light-emitting nanodisplay as claimed in claim 9, wherein the regulation of the three-beam laser excitation power and current is as follows: A. When the excitation power of the 808nm laser is 0.0W, the excitation power of the 980nm laser is 0.5W, and the current of the 1560nm laser is 0.0A, blue up-conversion luminescence is produced; B. When the excitation power of the 808nm laser is 0.8W, the excitation power of the 980nm laser is 1.1W, and the current of the 1560nm laser is 0.0A, cyan upconversion light is produced; C. When the excitation power of the 808nm laser is 1.5W, the excitation power of the 980nm laser is 0.0W, and the current of the 1560nm laser is 1.8A, yellow up-conversion luminescence is produced; D. When the excitation power of the 808nm laser is 0.0W, the excitation power of the 980nm laser is 0.0W, and the current of the 1560nm laser is 1.6A, red up-conversion luminescence is produced; E. When the excitation power of the 808nm laser is 0.0W, the excitation power of the 980nm laser is 0.5W, and the current of the 1560nm laser is 2.0A, pink up-conversion luminescence is produced; F. When the excitation power of the 808nm laser is 1.1W, the excitation power of the 980nm laser is 2.5W, and the current of the 1560nm laser is 1.2A, white up-conversion luminescence is produced; G. When the excitation power of the 808nm laser is 1.0W, the excitation power of the 980nm laser is 0.0W, and the current of the 1560nm laser is 0.0A, green up-conversion luminescence is produced.

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