WO2023280199A1

WO2023280199A1 - Three-dimensional display apparatus and control method therefor

Info

Publication number: WO2023280199A1
Application number: PCT/CN2022/104099
Authority: WO
Inventors: 韩成飞; 陈标; 张亮亮; 李军昌
Original assignee: 安徽省东超科技有限公司
Priority date: 2021-07-07
Filing date: 2022-07-06
Publication date: 2023-01-12
Also published as: CN113504660A

Abstract

A three-dimensional display apparatus (100) and a control method therefor, which relate to the technical field of display. The three-dimensional display apparatus (100) comprises: multiple laser optical path systems (10) and an up-conversion light-emitting material (20), laser beams emitted by the multiple laser optical path systems (10) being jointly irradiated on the up-conversion light-emitting material (20) to form a three-dimensional image being formed, and the wavelengths of the laser beams being different. In the three-dimensional display apparatus (100), the multiple laser beams of different wavelengths generated by means of the multiple laser optical path systems (10) are jointly irradiated on the up-conversion light-emitting material (20) to form a three-dimensional image.

Description

Three-dimensional display device and control method thereof

Cross References to Related Applications

This disclosure claims the priority of the Chinese patent application with application number 202110775183.4 and titled “Three-dimensional display device and its control method” filed on July 07, 2021, the entire content of which is incorporated by reference in this disclosure.

technical field

The present disclosure relates to a display technology device, in particular to a three-dimensional display device and a control method thereof.

Background technique

With the development of science and technology, people's requirements for display technology have risen from two-dimensional plane display to three-dimensional stereoscopic display. At present, 3D display technologies (such as fog and water curtain technology, wearable holographic devices, laser scanning, etc.) are mostly based on binocular parallax to deceive the brain to produce a 3D stereoscopic effect, all of which require external media or wear external devices to achieve human-eye visibility. The three-dimensional display effect does not conform to the viewing habits of human eyes, easily causes visual fatigue, and cannot realize 360° all-round viewing.

Contents of the invention

The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the present disclosure proposes a three-dimensional display device and a control method thereof, so as to realize high-contrast three-dimensional display without causing visual fatigue to the user and improving user experience.

In the first aspect, the present disclosure proposes a three-dimensional display device, including: a plurality of laser optical path systems and up-conversion luminescent materials. A three-dimensional image, wherein each of said laser beams has a different wavelength.

In the three-dimensional display device of the embodiment of the present disclosure, multiple laser beams with different wavelengths generated by multiple laser optical path systems are jointly irradiated on the up-conversion luminescent material to form a three-dimensional image, thereby realizing a high-contrast three-dimensional display, and It will not cause visual fatigue to users and improve user experience.

In addition, the three-dimensional display device according to the above-mentioned embodiments of the present disclosure may also have the following additional technical features:

According to an embodiment of the present disclosure, the laser optical path system includes: a laser emitter, the laser emitter is provided with a light outlet, and the laser beam generated by the laser emitter exits through the light outlet; an optical shutter, the The optical shutter is arranged at the light outlet for opening or closing the light outlet; the shaping assembly is arranged on the exit path of the laser beam for the laser light generated by the laser transmitter The light beam is subjected to beam expansion processing; the light field control component is arranged after the shaping component, and is used to adjust the expanded laser beam so that the outgoing laser beam is vertically irradiated on the up-conversion luminescent material on the incident surface, or, by focusing and zooming, the outgoing laser beam is image-scanned within the incident surface.

According to an embodiment of the present disclosure, the device further includes: a controller connected to the laser emitter, the optical shutter, and the light field adjustment component for acquiring a three-dimensional image profile, and according to The three-dimensional image profile controls the laser emitter, the optical shutter, and the light field adjustment component.

According to an embodiment of the present disclosure, the beam expansion factor of the shaping component is 1-6 times or 2-20 times, the maximum light output aperture of the shaping component is 10mm, and the laser transmittance of the shaping component is greater than 90%. .

According to an embodiment of the present disclosure, the light field adjustment component includes: a scanning component, which is arranged after the shaping component, and is used to change the emission of the expanded laser beam in one or two dimensions. Direction; lens assembly, the lens assembly is used to vertically irradiate the laser beam emitted by the scanning assembly on the incident surface of the up-conversion luminescent material, or focus and zoom the laser beam emitted by the scanning assembly to Image scanning is performed in the incident plane.

According to an embodiment of the present disclosure, the lens assembly includes: a flat-field focusing lens and a zoom lens group, the flat-field focusing lens is used for laser focusing, and the zoom lens is used for zooming the focused laser light, and the zoom range is 100-200mm, zoom response time is less than 30ms.

According to an embodiment of the present disclosure, the lens assembly includes: a flat-field cylindrical lens group, and the flat-field cylindrical lens group is used to make the laser beam modulated by the scanning assembly in a one-dimensional direction vertically irradiate on the The incident surface of the above conversion luminescent material.

According to an embodiment of the present disclosure, the laser optical path system further includes: a reflector, the reflector is arranged between the shaping component and the light field regulation component, and is used to adjust the propagation of the expanded laser beam direction.

In a second aspect, the present disclosure proposes a method for controlling a three-dimensional display device, the method is used for the above-mentioned three-dimensional display device, and the method includes the following steps: acquiring a three-dimensional image profile; The laser optical path system is controlled so that the laser beam emitted by one of the pair of laser optical path systems is vertically irradiated on a group of parallel incident surfaces of the up-conversion luminescent material, and the laser beam of the pair of laser optical path systems The other emitted laser beam performs image scanning sequentially in the parallel incident plane.

In a third aspect, the present disclosure proposes another method for controlling a three-dimensional display device, the method is used for the above-mentioned three-dimensional display device, and the method includes the following steps: acquiring a three-dimensional image profile; The laser optical path system is controlled so that a pair of focal points of laser beams emitted by the laser optical path system converge on the up-conversion luminescent material, and three-dimensional image scanning is performed in the up-conversion luminescent material.

Additional aspects and advantages of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.

Description of drawings

FIG. 1 is a structural block diagram of a three-dimensional display device according to an embodiment of the present disclosure;

FIG. 2 is a structural block diagram of a laser optical path system according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a three-dimensional display device according to a specific embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a three-dimensional display device according to another specific embodiment of the present disclosure;

FIG. 5 is a flowchart of a control method of a three-dimensional display device according to an embodiment of the present disclosure;

FIG. 6 is a flowchart of a control method of a three-dimensional display device according to another embodiment of the present disclosure;

FIG. 7 is a flowchart of a control method of a three-dimensional display device according to a specific embodiment of the present disclosure.

Reference signs:

100. Three-dimensional display device;

10. Laser optical path system; 20. Up-conversion luminescent material; 30. Controller; 10-1. Laser optical path system; 10-2. Laser optical path system; 10-3. Laser optical path system; 10-4. Laser optical path system;

11. Laser transmitter; 12. Optical shutter; 13. Shaping component; 14. Light field control component; 15. Mirror; 11-1. Laser transmitter; 12-1. Optical shutter; 13-1. Shaping component; 14-1. Light field control component; 11-2. Laser transmitter; 12-2. Optical shutter; 13-2. Shaping component; 14-2. Light field control component; 11-3. Laser transmitter; 12- 3. Optical shutter; 13-3. Shaping component; 14-3. Light field regulation component; 11-4. Laser transmitter; 12-4. Optical shutter; 13-4. Shaping component; 14-4. Light field regulation components;

141. Scanning component; 141-1. Scanning component; 141-2. Scanning component; 141-3. Scanning component; 141-4. Scanning component;

1421. Flat-field focus lens and zoom lens group; 1422. Plan-field cylindrical lens group; 1421-3. Flat-field focus lens and zoom lens group; 1421-4. Flat-field focus lens and zoom lens group.

detailed description

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present disclosure and should not be construed as limiting the present disclosure.

In order to better understand the technical solution of the present disclosure, the three-dimensional display device and its control method according to the embodiments of the present disclosure will be described in detail below in conjunction with FIGS. 1-7 of the specification and specific implementation manners.

FIG. 1 is a schematic structural diagram of a three-dimensional display device according to an embodiment of the present disclosure.

As shown in FIG. 1 , a three-dimensional display device 100 includes: multiple laser optical system 10 and up-conversion luminescent material 20, the laser beams emitted by multiple laser optical system 10 are irradiated on the up-conversion luminescent material 20 together to form a three-dimensional image, Here, the wavelengths of the respective laser beams are different.

Wherein, the up-conversion luminescent material 20 is a luminescent material excited by a long wavelength and emitted by a short wavelength. The excitation wavelength can be two-way or multi-way near-infrared light with different frequencies, and the wavelength range is 800nm-2000nm. The up-conversion luminescent material 20 can be a transparent bulk material, or it can be soluble in a transparent solvent or suspended in a gas Monodisperse nanoparticles or other suitable materials, as long as the above conditions can be met.

Specifically, the up-conversion luminescent material 20 is excited by a plurality of invisible lights of different wavelengths emitted by multiple laser optical system 10 to emit visible light, and the luminescent state inside the up-conversion luminescent material 20 can be controlled at a single point, and then can be controlled by fast scanning The method makes the internal light-emitting points arranged according to the required rules to form a three-dimensional image and realize a true three-dimensional display. The basic unit of the three-dimensional image is a voxel point. By irradiating the up-conversion luminescent material 20 with multiple laser beams of different wavelengths, a light-emitting voxel point is generated in three-dimensional space. At the same time, the movement of each laser beam can be controlled to make the light-emitting voxel point Points move quickly in three-dimensional space with certain rules, and based on the residual effect of human vision, a static or dynamic three-dimensional image can be displayed in three-dimensional space. Compared with the three-dimensional effect produced by deceiving the brain based on binocular parallax, this is more in line with the viewing habits of the human eye, will not cause visual fatigue, and the generated images are more realistic and the user experience is better.

In an embodiment of the present disclosure, as shown in FIG. 2 , the laser optical system 10 may include: a laser emitter 11 , an optical shutter 12 , a shaping component 13 and a light field regulating component 14 .

Referring to FIG. 2 , the laser emitter 11 is provided with a light outlet through which the laser beam generated by the laser emitter 11 is emitted. The optical shutter 12 is arranged at the light outlet, for example, it can be arranged on the housing of the laser emitter 11 and adjacent to the light outlet, and is used to open or close the light outlet. The shaping component 13 is arranged on the outgoing path of the laser beam, and is used for expanding the laser beam generated by the laser emitter 11 . The light field regulating component 14 is arranged after the shaping component 13, and is used for adjusting the laser beam after the beam expansion, so that the outgoing laser beam is irradiated vertically on the incident surface of the up-conversion luminescent material 20, or to make the outgoing laser beam The laser beam scans the image in the incident plane.

As an example, the shaping component 13 can be a beam expander, which can be arranged between the laser emitter 11 and the optical shutter 12, or behind the optical shutter 12, and is used to control the beam waist spot size of the laser beam. Specifically, it can be increased The spot area of the beam waist of the laser beam can further reduce the optical power parameter per unit area of the spot, thereby improving the service life of components, and at the same time cooperate with the parameter optimization of the light field control component 14 to further reduce the size of the focused light spot.

In an embodiment of the present disclosure, as shown in FIG. 2 , the three-dimensional display device 100 may further include: a controller 30 . The controller 30 is connected with the laser emitter 11, the optical shutter 12, and the light field control assembly 14, and is used to obtain the outline of the above-mentioned three-dimensional image, and adjust the laser emitter 11, the optical shutter 12, and the light field control assembly according to the outline of the three-dimensional image. 14 is controlled so as to form the above-mentioned three-dimensional image in the up-conversion luminescent material 20 . Optionally, the controller 30 can adjust the energy of the laser beam generated by the laser generator 11 when controlling the optical shutter 12 to close the light outlet.

Therefore, the three-dimensional display device of the embodiment of the present disclosure can control the brightness of different positions in the three-dimensional image by using the cooperation of the optical shutter 12 and the laser generator 11, and the cooperation of the brightness can increase the sense of picture and layering of the three-dimensional image, and further can Improve the display effect of the display screen.

As an example, the beam expansion factor of the shaping component 13 can be 1-20 times, the maximum light output aperture of the shaping component can be 10mm, and the laser transmittance of the shaping component is greater than 90%.

Specifically, as shown in FIG. 3, the shaping component 13-1 may be a beam shaper, and the beam expansion factor may be 1-6 times. The shaping component 13 - 2 may also include a first cylindrical lens 131 and a second cylindrical lens 132 , that is, a cylindrical lens group is used to one-dimensionally expand the point laser beam. In addition, the shaping component 13 may also include a multi-faceted rotating mirror, and the point laser may be modulated into a line laser by using the multi-faceted rotating mirror; the laser emitter 11 may also be a line laser.

In one embodiment of the present disclosure, as shown in FIG. 3 , the light field regulating component 14 includes: a scanning component 141 and a lens component.

Referring to FIG. 3 , the scanning component 141 is arranged behind the shaping component 13 and is used to change the outgoing direction of the expanded laser beam in one or two dimensions. The lens assembly is used to vertically irradiate the laser beam emitted by the scanning assembly 141 on the incident surface of the up-conversion luminescent material 20, or focus and zoom the laser beam emitted by the scanning assembly 141 to perform image scanning in the incident surface.

As an example, as shown in FIG. 3 , the scanning component 141 - 1 can change the outgoing direction of the expanded laser beam in two-dimensional directions. The lens assembly may include: a flat-field focusing lens and a zoom lens group 1421. The flat-field focusing lens is used for laser focusing, and the zoom lens is used for zooming the focused laser light. The zoom range can be 100-200mm, and the zoom response time can be less than 30ms .

Specifically, the scanning component 141-1 is arranged on the irradiation path of the laser beam, and can change the irradiation direction of the laser beam in the horizontal or vertical direction. The f-field focusing lens and zoom lens group 1421 are used to focus the laser beam reflected by the scanning component 141 - 1 to form a movable laser spot at a position corresponding to the up-converting luminescent material 20 . The scanning component 141-1 changes the position of the laser spot in the up-conversion luminescent material 20 by changing the reflection direction of the laser beam. Since the scanning component 141-1 drives the light spot to move extremely fast, before the previous light spot disappears, the Completing the next focal point forms a spot, thereby facilitating the formation of a three-dimensional image within the up-converting luminescent material 20 .

As another example, as shown in FIG. 3 , the scanning component 141 - 2 is used to change the outgoing direction of the expanded laser beam in one dimension. The lens assembly may include: a flat-field cylindrical lens group 1422. The flat-field cylindrical lens group 1422 is used to make the laser beam modulated by the scanning assembly 141-1 in a one-dimensional direction vertically irradiate the incident surface of the up-conversion luminescent material 20. .

Specifically, referring to FIG. 3 , the laser beam emitted by the laser optical system 10-2 is incident on the up-conversion luminescent material 20, and a surface is excited; while the laser beam emitted by the laser optical system 10-1 is a laser point, which controls the The laser point is image-scanned in this excitation surface, and a two-dimensional image can be obtained. By controlling the scanning component 141-1, the flat-field focusing lens and the zoom lens group 1421, and the scanning component 141-2, a three-dimensional image can be displayed in the up-conversion luminescent material 20, and the specific working process can be shown in FIG. 7 .

In an embodiment of the present disclosure, as shown in FIG. 4 , the laser optical path system 10 may further include: a reflector 15, which is arranged between the shaping component 13-4 and the light field regulation component 14-4 for adjusting The propagation direction of the expanded laser beam.

Specifically, referring to FIG. 4 , the laser beams emitted by the laser optical path system 10-3 and the laser optical path system 10-4 are both a laser point, and the two laser points are controlled to intersect at one point in the up-conversion luminescent material 20, and then the point is controlled at The three-dimensional image can be displayed on the up-conversion luminescent material 20 by scanning the three-dimensional image of the conversion material 20 .

The number of laser optical path systems in the present disclosure can be set to two or more. The following takes two laser optical path systems 10 as an example to describe the three-dimensional display device in the embodiment of the present disclosure through two feasible implementation modes. In the two embodiments, the area occupied by the up-conversion luminescent material 20 is a three-dimensional imaging area, and the up-conversion luminescent material 20 can be a dual-frequency or multi-frequency up-conversion luminescent material, and the types of materials available include rare earth oxides, rare earth doped antimony Salt glass, rare earth doped fluoride glass, rare earth doped fluoride crystal, etc. The state of the material can be bulk transparent glass, or monodisperse nanoparticles soluble in transparent solvent or suspended in gas.

As a feasible implementation manner, as shown in FIG. 3 , a three-dimensional display device 100 includes two laser optical path systems 10 and an up-conversion luminescent material 20 . One of the laser optical path systems 10-1 includes: a laser transmitter 11-1, an optical shutter 12-1, a shaping component 13-1, a scanning component 141-1, a flat-field focusing lens and a zoom lens group 1421; another laser optical path system 10-2 includes: laser transmitter 11-2, optical shutter 12-2, shaping component 13-2 (including first cylindrical mirror 131, second cylindrical mirror 132), scanning component 141-2, flat-field cylindrical Lens group 1422.

Referring to Fig. 3, the laser emitter 11-1 is used to excite the up-conversion luminescent material 20, the wavelength of the generated laser beam is in the range of 800nm-2000nm, the circular spot, and the power is adjustable in the range of 10mW-500mW. The optical shutter 12-1 is placed outside the laser transmitter 11-1 to control the laser transmitter 11-1 on and off. The optical aperture is larger than the spot size of the laser transmitter 11-1, and the maximum response frequency can be greater than 5MHz. The shaping component 13-1 (or denoted as the beam shaper) is used to expand the laser beam, the beam expansion factor is adjustable within the range of 1-6 times, and the maximum light output aperture can be 10mm. The transmittance of the outgoing laser beam can be greater than 90%. The scanning component 141-1 is used for scanning and deflecting the laser beam laterally (including the horizontal direction and the vertical direction, that is, the XY direction), which can adopt a high-speed mechanical galvanometer, MEMS (Micro-Electro Mechanical Systems, micro-electromechanical systems) scanning mirror system , DMD system (DigitalMicro-mirror Devices, digital micro-mirror system), DLP system (DigitalLightProcession, digital light processing system), etc. The flat-field focusing lens and zoom lens group 1421 are used for laser focusing and Z-axis scanning. The zoom range is between 100-200mm, and the zoom response time can be less than 30ms. Liquid zoom mirrors or deformable mirrors can be used.

The laser emitter 11-2 is used to excite 20 of the up-conversion luminescent material, the wavelength of the generated laser beam is in the range of 800nm-2000nm, the circular spot, the power is adjustable within the range of 10mW-500mW, and it is compatible with the laser emitter 11 -1 The wavelength of the laser beam produced is different. The optical shutter 12-2 is placed outside the laser transmitter 11-2 to control the laser transmitter 11-2 on and off. The optical aperture is larger than the spot size of the laser transmitter 11-2, and the maximum response frequency can be greater than 5MHz. The shaping component 13-2 (including the first cylindrical lens 131 and the second cylindrical lens 132) is used for one-dimensional beam expansion of the laser beam, the beam expansion factor is adjustable within the range of 2-20 times, and the maximum light output aperture can 10mm, the transmittance of the laser beam emitted by the laser emitter 11-2 can be greater than 90%. The scanning component 141 - 2 is used for one-dimensional scanning of the laser beam, and modulates the incident direction of the line laser entering the flat-field cylindrical lens group 1422 . The flat-field cylindrical lens group 1422 is used to modulate the transmission direction of the line laser, so that the light deflected by the scanning component 141-2 passes through the flat-field cylindrical lens group 1422 and is incident on the surface of the up-conversion luminescent material 20 in a vertical direction.

Thus, through the dual-frequency up-conversion luminescent material and the special optical path design, a high-contrast three-dimensional display can be realized, and the displayed three-dimensional image can be static or dynamic. At the same time, the 3D image can be viewed without external auxiliary equipment, which is a true 3D display, which will not cause visual fatigue to the user, and can be viewed at close to 360°, providing a good user experience.

Different from the embodiment shown in Figure 3 above in which one path is excited and the other path is scanned on the excitation surface, in another feasible embodiment, as shown in Figure 4, this embodiment is represented by the focus of the two laser paths being up-converted The luminescent materials 20 overlap in the body, and only the overlapped intersection points emit light, that is, point-to-point addressing and scanning.

Specifically, referring to FIG. 4 , a three-dimensional display device 100 includes two laser optical systems 10 and an up-conversion luminescent material 20 . The difference between the laser optical path system 10-3 and the laser optical path system 10-4 is that the laser optical path system 10-4 further includes a mirror 15 for deflecting and adjusting the propagation direction of the laser beam. Laser transmitter 11-3, optical shutter 12-3, shaping component 13-3, scanning component 141-3, flat-field focusing lens and zoom lens group 1421-3 in laser optical path system 10-3, and laser optical path system 10 The laser transmitter 11-4, optical shutter 12-4, shaping component 13-4, scanning component 141-4, flat-field focusing lens and zoom lens group 1421-4 in -4 can refer to the laser emission in the above-mentioned embodiment device 11-1, optical shutter 12-1, shaping component 13-1, scanning component 141-1, f-field focusing lens and zoom lens group 1421.

In addition, the implementation shown in FIG. 4 increases the complexity of the scanning motion compared to the implementation shown in FIG. 3 . The implementation shown in Figure 4 requires the alignment of two laser beams in three-dimensional space, which is difficult; the implementation shown in Figure 3 only needs two laser beams to be aligned in two-dimensional space. The transmitter power is relatively high.

In summary, the three-dimensional display device of the embodiment of the present disclosure can realize high-contrast three-dimensional display through dual-frequency or multi-frequency up-conversion luminescent materials and special optical path design, and the displayed three-dimensional image can be static or dynamic Yes, you can watch 3D images without external auxiliary equipment. It is a true 3D display that will not cause visual fatigue to users, and can be viewed at close to 360°, which improves the user experience.

FIG. 5 is a flowchart of a control method of a three-dimensional display device according to an embodiment of the present disclosure.

In an embodiment of the present disclosure, the method for controlling a three-dimensional display device is used for the above-mentioned three-dimensional display device. As shown in FIG. 5, the control method of the three-dimensional display device includes the following steps:

S51. Acquire the outline of the three-dimensional image.

S52. Control at least one pair of laser optical path systems according to the three-dimensional image profile, so that the laser beam emitted by one of the pair of laser optical path systems is vertically irradiated on a group of parallel incident surfaces of the up-conversion luminescent material, and the pair of laser optical path systems Another outgoing laser beam in the system performs image scanning sequentially in the parallel incident plane.

Specifically, referring to FIG. 3 , the three-dimensional display device may include a pair of laser light path systems. The laser beam emitted by one of the laser optical path systems is incident on the up-conversion luminescent material, and one surface is excited; the laser beam emitted by the other laser optical path system is a laser point, and the laser point is controlled to perform image scanning on the excitation surface. A two-dimensional image can be obtained. Furthermore, by controlling the two laser optical path systems, sequentially exciting multiple excitation surfaces, and correspondingly performing image scanning in each excitation surface, a three-dimensional image can be displayed in the up-conversion luminescent material. The specific working process can be shown in Figure 7.

The control method of the three-dimensional display device according to the embodiment of the present disclosure can realize high-contrast three-dimensional display by performing point-plane scanning control on the three-dimensional display device including dual-frequency or multi-frequency up-conversion luminescent materials and special optical path design , and the displayed 3D image can be static or dynamic, and the 3D image can be viewed without external auxiliary equipment. Improved user experience.

FIG. 6 is a flowchart of a control method of a three-dimensional display device according to another embodiment of the present disclosure.

In an embodiment of the present disclosure, the method for controlling a three-dimensional display device is used for the above-mentioned three-dimensional display device. As shown in FIG. 6, the control method of the three-dimensional display device includes the following steps:

S61. Acquire the outline of the three-dimensional image.

S62. Control at least one pair of laser optical path systems according to the three-dimensional image profile, so that the focal points of the laser beams emitted by the pair of laser optical path systems converge on the up-conversion luminescent material, and perform three-dimensional image scanning in the up-conversion luminescent material.

Specifically, referring to FIG. 4 , the three-dimensional display device may include a pair of laser light path systems. The laser beams emitted by the two laser optical path systems are incident on the up-conversion luminescent material and intersect at one point. Then, by controlling the two laser optical path systems, the point performs a three-dimensional scanning movement in the up-conversion luminescent material. A three-dimensional stereoscopic image is displayed in an upconverting luminescent material.

The control method of the three-dimensional display device according to the embodiment of the present disclosure can realize high-contrast three-dimensional Stereoscopic display, and the displayed three-dimensional image can be static or dynamic, and the three-dimensional image can be viewed without external auxiliary equipment. It is a true three-dimensional display, which will not cause visual fatigue to the user, and can be close to 360° Watch, enhance the user experience.

It should be noted that the logic and/or steps shown in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, apparatus, or device and execute instructions), or in combination with these Instructions are used to execute systems, devices, or equipment. For the purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use in or in conjunction with an instruction execution system, device or device. More specific examples (non-exhaustive list) of computer-readable media include the following: electrical connection with one or more wires (electronic device), portable computer disk case (magnetic device), random access memory (RAM), Read Only Memory (ROM), Erasable and Editable Read Only Memory (EPROM or Flash Memory), Fiber Optic Devices, and Portable Compact Disc Read Only Memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program can be printed, since the program can be read, for example, by optically scanning the paper or other medium, followed by editing, interpretation or other suitable processing if necessary. The program is processed electronically and stored in computer memory.

It should be understood that various parts of the present disclosure may be implemented in hardware, software, firmware or a combination thereof. In the embodiments described above, various steps or methods may be implemented by software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or combination of the following techniques known in the art: Discrete logic circuits, ASICs with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In describing the present disclosure, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientations or positional relationships indicated by "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying the referred devices or elements Must be in a particular orientation, constructed, and operate in a particular orientation, and thus should not be construed as limiting on the present disclosure.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this disclosure, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection unless otherwise clearly defined and limited. , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present disclosure according to specific situations.

In the present disclosure, unless otherwise clearly stated and limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present disclosure, and those skilled in the art can understand the above-mentioned embodiments within the scope of the present disclosure. The embodiments are subject to changes, modifications, substitutions and variations.

Claims

A three-dimensional display device, characterized in that it comprises: a plurality of laser optical path systems and up-conversion luminescent materials, and the laser beams emitted by the plurality of laser optical path systems are jointly irradiated on the up-conversion luminescent materials to form a three-dimensional image, wherein , the wavelengths of the laser beams are different.
The three-dimensional display device according to claim 1, wherein the laser optical path system comprises:

A laser transmitter, the laser transmitter is provided with a light outlet, and the laser beam generated by the laser transmitter is emitted through the light outlet;

an optical shutter, the optical shutter is arranged at the light outlet, and is used to open or close the light outlet;

A shaping component, the shaping component is arranged on the outgoing path of the laser beam, and is used to expand the laser beam generated by the laser transmitter;

A light field control component, the light field control component is arranged after the shaping component, and is used to adjust the expanded laser beam so that the outgoing laser beam is vertically irradiated on the incident surface of the up-conversion luminescent material, or , so that the outgoing laser beam performs image scanning in the incident plane through focusing and zooming.
The three-dimensional display device according to claim 2, wherein the device further comprises:

a controller, the controller is connected with the laser emitter, the optical shutter, and the light field regulation component, and is used to obtain a three-dimensional image profile, and control the laser emitter, the The optical shutter and the light field regulating component are controlled.
The three-dimensional display device according to claim 2, wherein the beam expansion factor of the shaping component is 1-6 times or 2-20 times, the maximum light output diameter of the shaping component is 10mm, and the beam expansion of the shaping component The laser transmittance is greater than 90%.
The three-dimensional display device according to claim 2, wherein the light field regulation component comprises:

A scanning component, the scanning component is arranged behind the shaping component, and is used to change the outgoing direction of the expanded laser beam in one or two dimensions;

A lens assembly, the lens assembly is used to vertically irradiate the laser beam emitted by the scanning assembly on the incident surface of the up-conversion luminescent material, or to focus and zoom the laser beam emitted by the scanning assembly, so as to Scan the image in the incident plane.
The three-dimensional display device according to claim 5, wherein the lens assembly comprises:

A flat-field focusing lens and a zoom lens group, the flat-field focusing lens is used for laser focusing, and the zoom lens is used for zooming the focused laser light, the zoom range is 100-200mm, and the zoom response time is less than 30ms.
The three-dimensional display device according to claim 5, wherein the lens assembly comprises:

A flat-field cylindrical lens group, the flat-field cylindrical lens group is used to make the laser beam modulated by the scanning component in one-dimensional direction vertically irradiate the incident surface of the up-conversion luminescent material.
The three-dimensional display device according to claim 2, wherein the laser light path system further comprises:

A reflection mirror, the reflection mirror is arranged between the shaping component and the light field regulation component, and is used to adjust the propagation direction of the expanded laser beam.
A method for controlling a three-dimensional display device, characterized in that the method is used in the three-dimensional display device according to any one of claims 1-8, and the method includes the following steps:

Obtain the outline of the three-dimensional image;

Control at least one pair of the laser optical path systems according to the three-dimensional image profile, so that the laser beam emitted by one of the pair of laser optical path systems vertically irradiates a group of parallel incident surfaces of the up-conversion luminescent material Above, the laser beam emitted by the other of the pair of laser optical path systems performs image scanning sequentially in the parallel incident plane.
A method for controlling a three-dimensional display device, characterized in that the method is used in the three-dimensional display device according to any one of claims 1-8, and the method includes the following steps:

Obtain the outline of the three-dimensional image;

Control at least one pair of the laser optical path systems according to the three-dimensional image profile, so that the focus of the laser beams emitted by the pair of laser optical path systems converges on the up-conversion luminescent material, and emits light on the up-conversion luminescent material. 3D image scanning within the material.