Display device and vehicle

Abstract

The invention provides a display device and a vehicle, and the method comprises a display medium which comprises a first side, a second side and a third side which are connected in sequence, and the display medium comprises a stimulated luminescence material; the first side and the second side are used for receiving first light and second light from the first direction and the second direction respectively, the first side is opposite to the third side, and the first light and the second light intersect in the display medium and excite the excited luminescence material to emit light so as to display an image corresponding to the to-be-displayed image information from the third side; the first light emitting unit is used for emitting first light; the second light emitting unit is used for emitting second light; the control unit is electrically coupled with the first light-emitting unit and the second light-emitting unit and used for controlling the first light-emitting unit to emit the first light and controlling the second light-emitting unit to emit the second light. The first light and the second light intersect in the display medium to excite the excited light-emitting material to emit light, and the three-dimensional suspension display effect is achieved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display device and a vehicle. Background Art

[0002] With the development of science and technology, space suspension display technology, as a cutting-edge three-dimensional display solution, has shown great application potential in many important fields such as medical imaging and intelligent manufacturing. This technology can realize the direct presentation of images in the air, meeting people's demand for a real three-dimensional visual experience. At present, there are many ways to achieve suspension display, including projection systems that use water mist as a scattering medium, and suspension display systems based on femtosecond lasers, but these methods all have certain limitations.

[0003] In the existing suspension display technology, the system using water mist as a scattering medium is generally used in large-scale display scenes, but the density of the water mist is uneven and unstable, resulting in low resolution of the displayed image. Another suspension display system based on femtosecond lasers can ionize the air through lasers and perform three-dimensional scanning in the air to generate suspended images, but it also has problems such as low resolution, small screen size, and safety. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a display device and a vehicle to solve or partially solve the above problems.

[0005] As one aspect of the present application, a display device is provided, including:

[0006] A display medium, comprising a first side, a second side and a third side connected in sequence, the display medium comprising an excited luminescent material; the first side and the second side are used to receive a first light and a second light from a first direction and a second direction respectively, the first side is opposite to the third side, the first light comprises image information to be displayed, the wavelength of the second light is different from the wavelength of the first light, the first light and the second light meet in the display medium and excite the excited luminescent material to emit light so as to display an image corresponding to the image information to be displayed from the third side;

[0007] A first light emitting unit, disposed on the first side and / or the second side of the display medium, and configured to emit the first light;

[0008] A second light emitting unit, disposed on the second side of the display medium, for emitting the second light;

[0009] The control unit is electrically coupled to the first light emitting unit and the second light emitting unit, respectively, and is used to control the first light emitting unit to emit the first light and control the second light emitting unit to emit the second light.

[0010] Optionally, the stimulated luminescent material includes an up-conversion luminescent material, and / or the display medium includes nano-ceramic glass.

[0011] Optionally, the wavelength of the first light is smaller than the wavelength of the second light; and / or

[0012] The wavelength of the first light is 800-900 nm; and / or

[0013] The wavelength of the second light is 1500-1600 nm.

[0014] Optionally, the first light and the second light meet in the display medium and excite elements in the stimulated luminescent material to undergo transition to emit fluorescence.

[0015] Optionally, the second light includes linear light emitted by a line light source, and the second light forms a linear light band when irradiated into the display medium. The first light and the second light intersect in the display medium and excite the stimulated luminescent material to emit light to display the image corresponding to the image information to be displayed as a suspended three-dimensional image.

[0016] Optionally, the first light emitting unit includes a first light source, a reflective device, and a focusing lens, the first light source is located on the second side of the display medium, the reflective device and the focusing lens are located on the first side of the display medium, and the first light emitted from the second side by the first light source is reflected to the first side by the reflective device and focused by the focusing lens before being incident from the first side of the display medium;

[0017] The second light emitting unit includes a second light source located at the second side of the display medium, and the second light emitted by the second light source is incident from the second side of the display medium.

[0018] Optionally, the first light and the second light are lasers.

[0019] Optionally, the display medium is a right-angled trapezoidal prism structure, the third side corresponds to the inclined surface of the right-angled trapezoidal prism structure, the second side corresponds to the first surface of the right-angled trapezoidal prism structure connected to the inclined surface, and the first side corresponds to the second surface of the right-angled trapezoidal prism structure connected to the first surface; or,

[0020] The display medium is a cylindrical structure, the first side and the third side correspond to two planes of the cylindrical structure respectively, and the second side corresponds to a side surface of the cylindrical structure.

[0021] Optionally, the display device includes a vehicle-mounted display device or an aircraft-mounted display device;

[0022] The display medium of the right-angled trapezoidal prism structure further comprises a third surface connected to the inclined surface and the second surface, and the third surface is arranged on the front windshield; or

[0023] When the display medium is a cylindrical structure, the reflective device is arranged on the front windshield, and the inclination angle of the reflective surface of the reflective device is the same as the inclination angle of the front windshield.

[0024] Optionally, the reflective device is a digital micro-mirror device; and / or

[0025] The second light source comprises:

[0026] A laser generator, used to generate laser light;

[0027] The optical corrector is used to convert the laser into the line light source to emit linear light as the second light.

[0028] Optionally, the display device includes a head-up display device.

[0029] As a second aspect of the present application, a vehicle is provided, comprising the display device described in the first aspect, wherein the display device is arranged on a front windshield of the vehicle.

[0030] From the above, it can be seen that the display device and vehicle provided by the present application, the display device excites the stimulated luminescent material to emit light by the intersection of the first light and the second light in the display medium, thereby displaying an image on the third side. The control unit can control the first light-emitting unit and the second light-emitting unit respectively, which means that the intensity, wavelength or other characteristics of the two lights can be accurately adjusted as needed. This flexibility enables the display device to adapt to different display requirements and environmental conditions and provide the best visual effect. At the same time, this layout makes the device compact, improves energy utilization efficiency, achieves a high-definition three-dimensional suspended display effect, and enhances user experience.

[0031] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 A schematic block diagram of a display device provided in an embodiment of the present application;

[0034] Figure 2 A schematic block diagram of another display device provided in an embodiment of the present application;

[0035] Figure 3 A schematic block diagram of another display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0037] It should be noted that, in the embodiments of the present application, words such as "exemplarily" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplarily" or "for example" is intended to present related concepts in a concrete way. Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the usual meaning understood by people with ordinary skills in the field to which the present application belongs.

[0038] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates, for example, that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not directly connected to each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0040] The terms "parallel", "perpendicular" and "equal" as used in the specification and claims of this application include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement being discussed and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism may be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity may also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality may be, for example, that the difference between the two equals is less than or equal to 5% of either one.

[0041] It will be understood that when a layer or an element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present between the layer or element and the other layer or substrate.

[0042] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of the layers and the area of ​​the regions are exaggerated for clarity. Therefore, variations in the shapes relative to the drawings due to, for example, manufacturing techniques and / or tolerances are conceivable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the regions shown herein, but include shape deviations due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shapes of the regions of the device, and are not intended to limit the scope of the exemplary embodiments.

[0043] Figure 1 A schematic block diagram of a display device provided by some embodiments of the present disclosure is shown.

[0044] like Figure 1 As shown, the display device 100 includes a display medium 10 , a first light emitting unit 20 , a second light emitting unit 30 , and a control unit 40 .

[0045] Among them, the display medium 10 includes a first side, a second side and a third side connected in sequence, and the display medium 10 includes an stimulated luminescent material; the first side and the second side are used to receive a first light and a second light from a first direction and a second direction respectively, the first side is opposite to the third side, the first light includes image information to be displayed, and the wavelength of the second light is different from the wavelength of the first light. The first light and the second light meet in the display medium 10 and stimulate the stimulated luminescent material to emit light so as to display the image corresponding to the image information to be displayed from the third side.

[0046] In some embodiments, the stimulated luminescent material includes an up-conversion luminescent material, and / or the display medium 10 includes nano-ceramic glass.

[0047] Optionally, the luminescent material can be an up-conversion luminescence (UCL) material, which is a special material that can absorb low-energy photons and emit high-energy photons. This mechanism has important applications in the fields of biological imaging, anti-counterfeiting labels, optical communications, etc.

[0048] Among them, the materials that realize the upconversion luminescence mechanism include: rare earth doped fluoride nanocrystals: rare earth ions (such as Er 3+ , Yb 3+ 、Tm 3+ Fluoride nanocrystals doped with NaYF are the most widely studied upconversion materials. 4: Yb, Er nanocrystals can emit visible light or ultraviolet light by absorbing near-infrared light. This material has high luminescence efficiency, narrow emission peak and stable energy level structure, and is widely used in biomedical imaging and anti-counterfeiting technology. Rare earth-doped oxides and phosphates: Rare earth ion-doped oxides (such as NaGdF 4 :Er 3+ ) and phosphate glasses can also achieve upconversion luminescence. For example, by constructing a core-shell structure (such as NaGdF 4 :Er 3+ @NaGdF 4 ), which can significantly enhance Er 3+ In addition, Tm 3+ Doped phosphate glasses also show good infrared spectral characteristics. Perovskite materials: Perovskite nanocrystals (such as CsPbX 3 , X=Cl, Br, I) also shows great potential in the field of upconversion luminescence. By co-growing with rare earth-doped nanocrystals, perovskite materials can achieve efficient upconversion luminescence under near-infrared light excitation. For example, CsPbBr 3 Perovskite Nanocrystals and Tm:NaYbF 4 Nanocrystal co-growth can be used for high-sensitivity biological imaging. Other composite materials: Some composite materials can also achieve upconversion luminescence through surface modification or core-shell structure construction. For example, by 4 :Er 3+ The surface of nanocrystals is modified with silver nanotubes to enhance the three-photon near-infrared upconversion luminescence using the surface plasmon effect. In addition, by constructing a multilayer core-shell structure (such as NaYF 4 :Yb,Er@NaYF 4 :Nd), the color of up-conversion luminescence can be adjusted. New rare earth doped materials: some new rare earth doped materials, such as doped Nd 3+ Nanocrystals also show excellent upconversion luminescence properties. 3+ Sensitized core-shell nanocrystals can achieve efficient photon upconversion under near-infrared light excitation.

[0049] In summary, rare earth-doped fluoride nanocrystals (such as NaYF 4 :Yb,Er) is the most mature upconversion material with high luminescence efficiency and stable physical and chemical properties. Perovskite materials and rare earth doped oxides / phosphates also show good application prospects.

[0050] In some embodiments, the display device 100 includes a vehicle-mounted display device or an airborne display device. Among them, the vehicle-mounted display device is an important device for human-vehicle interaction in modern smart cars. With the development of automobile intelligence, its functions and application scenarios are constantly expanding. It is usually used to display vehicle information, navigation, entertainment systems, etc., which can improve driving experience and safety. An airborne display device refers to a display system installed in the cockpit of an aircraft for displaying data such as flight parameters, navigation information, and system status. These devices present information to pilots intuitively in the form of graphics, text, and symbols to help them make decisions quickly.

[0051] Alternatively, if Figure 1 As shown, the display medium 10 can be a right-angled trapezoidal prism structure, the third side corresponds to the inclined surface of the right-angled trapezoidal prism structure, the second side corresponds to the first surface of the right-angled trapezoidal prism structure connected to the inclined surface, and the first side corresponds to the second surface of the right-angled trapezoidal prism structure connected to the first surface. The display medium 10 of the right-angled trapezoidal prism structure also includes a third surface connected to the inclined surface and the second surface, and the third surface is arranged on the front windshield 50 of the vehicle-mounted display device or the airborne display device. Such a design makes the display device 100 more compact and easy to install and maintain. At this time, the human eye 60 can receive the three-dimensional floating image formed on the third side of the display medium 10, and the image is directly displayed in the driver's field of vision without shifting the line of sight, which not only makes full use of the limited space in the car, but also ensures the intuitiveness and readability of the displayed content.

[0052] Alternatively, if Figure 2 As shown, the display medium 10 can also be a cylindrical structure, the first side and the third side correspond to the two planes of the cylindrical structure respectively, and the second side corresponds to the side surface of the cylindrical structure. In addition, when the display medium 10 is a cylindrical structure, the reflective device 22 is arranged on the front windshield 50 of the vehicle-mounted display device or the aircraft-mounted display device, and the inclination angle of the reflective surface of the reflective device 22 is the same as the inclination angle of the front windshield. The display medium with a cylindrical structure can provide a more uniform light distribution and a wider viewing angle. At the same time, the inclination angle of the reflective surface of the reflective device 22 is the same as the inclination angle of the front windshield, and the entire display device 100 can be seamlessly integrated into the existing structure of the vehicle or aircraft, reducing the additional space occupied.

[0053] In some embodiments, the display device 100 includes a head-up display device. A head-up display (HUD) is a device that projects vehicle information (such as speed, navigation, vehicle status, etc.) onto glass or other transparent media in front of the driver's line of sight. Its core purpose is to reduce the frequency of the driver looking down at the dashboard or navigation device, thereby improving driving safety. In addition, the head-up display device is suitable for a variety of scenarios such as vehicle-mounted and airborne, and has broad application prospects.

[0054] In some embodiments, the first light emitting unit 20 is disposed on the first side and / or the second side of the display medium 10 to emit a first light. Figure 1 and Figure 2 As shown, the first light emitting unit 20 includes a first light source 21, a reflective device 22, and a focusing lens 23. The first light source 21 is located at the second side of the display medium 10, and the reflective device 22 and the focusing lens 23 are located at the first side of the display medium 10. The first light emitted from the second side by the first light source 21 is reflected to the first side by the reflective device 22 and is focused by the focusing lens 23 before entering from the first side of the display medium 10. Among them, through the combination of the reflective device 22 and the focusing lens 23, the first light emitting unit 20 can accurately control the direction and focusing position of the first light, ensure that the image information can be accurately displayed in the display medium 10, and ensure high-quality image display.

[0055] In some embodiments, the image information to be displayed included in the first light may be a real scene or a virtual scene. The virtual scene refers to a pre-stored scene, which may also be acquired based on the actual scene. The pre-stored virtual scene is convenient for later call and playback. The real scene is acquired in real time based on the actual scene, and the real-time scene situation can be acquired accurately and timely, which is conducive to making accurate judgments later. For example, for a vehicle, the virtual scene may be the driving information on the road that has been pre-photographed and stored, and the real scene may be the driving information on the road that has been photographed in real time.

[0056] Optionally, the focusing lens 23 is a variable focal length lens. By adjusting the focal length of the variable focal length lens, the distance between the image and the variable focal length lens can be adjusted, that is, the imaging position and imaging size of the image can be adjusted to meet the user's requirements for different imaging positions and imaging sizes.

[0057] Optionally, the reflective device 22 is a digital micromirror device (DMD). DMD is an array composed of thousands or even millions of tiny mirrors, each of which can be tilted independently to control the direction of light. DMD ensures uniform distribution of light in the display medium 10 by independently controlling each pixel, reducing light loss and improving display quality and brightness.

[0058] It should be noted that the first light is laser. Laser is a coherent light generated by the principle of stimulated emission. Its characteristics are: High monochromaticity: The wavelength of the laser is very single and the spectrum width is extremely narrow. High directivity: The divergence angle of the laser beam is very small and can almost be regarded as parallel light. High brightness: The intensity of the laser is very high and a large amount of energy can be concentrated in a very small area. Coherence: The light waves of the laser are highly coherent in time and space, which makes the laser used in precision measuring equipment such as interferometers. Lasers can be generated by a variety of light sources, including gas lasers (such as helium-neon lasers), solid lasers (such as neodymium glass lasers), semiconductor lasers (such as laser diodes), etc. The wavelength range of lasers can cover the entire spectrum from ultraviolet light to infrared light, or even wider. Infrared light is part of the electromagnetic spectrum, located between visible light (red light) and microwaves. Its wavelength range is usually between 700 nanometers and 1 millimeter, and is divided into three regions: near infrared (NIR), mid-infrared (MIR), and far infrared (FIR): Near infrared (NIR): The wavelength range is about 700 nanometers to 2.5 microns. Mid-infrared (MIR): The wavelength range is about 2.5 microns to 25 microns. Far infrared (FIR): The wavelength range is about 25 microns to 1 millimeter. The main characteristic of infrared light is its strong thermal effect, and it is often used in thermal imaging, infrared communications, night vision equipment and other fields.

[0059] It should be understood that lasers can be infrared light: lasers have a wide range of wavelengths, and some of them do belong to infrared light. For example, common semiconductor lasers (such as laser diodes) usually emit near-infrared light (wavelengths between 800 nanometers and 1.5 microns), which are widely used in fiber-optic communications, spectral analysis and other fields. Lasers can also be light of other wavelengths: lasers are not limited to infrared light, but can also be ultraviolet light (such as excimer lasers), visible light (such as the red light of helium-neon lasers), etc. However, infrared light is not necessarily laser: infrared light is part of the electromagnetic spectrum, while laser is a special kind of light with high coherence and directionality. Ordinary infrared light (such as infrared light generated by thermal radiation) does not have the characteristics of lasers. Therefore, lasers are a special kind of light with high monochromaticity, directionality and coherence, and its wavelength can cover multiple regions such as ultraviolet light, visible light and infrared light. Infrared light is part of the electromagnetic spectrum, mainly characterized by thermal effects. Lasers can be infrared light, but infrared light is not necessarily laser. The high directionality and monochromaticity of lasers allow light to be focused and guided more accurately, reducing light scattering and energy loss.

[0060] In some embodiments, the second light emitting unit 30 is disposed on the second side of the display medium 10 to emit a second light. The second light emitting unit 30 includes a second light source 31 located on the second side of the display medium 10, and the second light emitted by the second light source 31 is incident from the second side of the display medium 10. The introduction of the second light emitting unit 30 enables the display medium 10 to receive light from both sides. This design not only increases the source of light, but also can achieve more complex and diverse display effects by adjusting the light intensity and color of the first light emitting unit 20 and the second light emitting unit 30. For example, specific brightness, contrast and color balance can be achieved by precisely controlling the light output of the two light emitting units to meet different application requirements.

[0061] In some embodiments, the wavelength of the first light is smaller than the wavelength of the second light. The wavelength of the first light is 800-900nm, and the wavelength of the second light is 1500-1600nm. The light in the wavelength range of the first light belongs to near-infrared light (NIR), has high penetration and low scattering, is suitable for carrying image information, and can be efficiently transmitted in the display medium. The wavelength range of the second light belongs to the short-wave infrared (SWIR) region, has lower photon scattering loss and near-zero autofluorescence background, can provide higher spatial resolution and deeper tissue imaging depth, in addition, due to its higher energy absorption characteristics, it can effectively excite the stimulated luminescent material to emit light. By intersecting two beams of light of different wavelengths in the display medium, the display device 100 can achieve high-resolution, low-scattering image display.

[0062] In some embodiments, the second light includes linear light emitted by a linear light source. When the second light is irradiated into the display medium 10, it forms a linear light band. The first light and the second light meet in the display medium 10 and excite the stimulated luminescent material to emit light so as to display the image corresponding to the image information to be displayed as a suspended three-dimensional image. The light emitted by a linear light source is generally referred to as linear light or linear light source light in the fields of physics and architectural lighting, which is defined as: a continuous strip-shaped luminous body, whose total length is much greater than the distance between it and the illumination calculation point. The characteristic of this light is that it is evenly distributed along the length direction of the light source to form a linear light band. The proprietary names of linear light sources vary in different fields, for example, architectural lighting terminology: Linear Light Source; description in physics: Linear Light Source; machine vision field: Linear Light Source. Typical applications of linear light sources include fluorescent tubes, LED light strips, fiber optic lights, etc. This linear light band not only has a clear directionality, but also can form a clear light path in the display medium 10, providing a basis for subsequent image display.

[0063] It should be noted that, like the first light beam, the second light beam may also be a laser beam.

[0064] In some embodiments, the second light source 31 includes: a laser generator for generating laser light; an optical corrector for converting the laser light into a linear light source to emit linear light as the second light. Among them, the working principle of the laser generator is based on the stimulated radiation of light and the light amplification effect, and can generate a high-quality laser beam. This laser beam has the characteristics of good monochromaticity, strong coherence, and good directionality. The optical corrector performs beam expansion, shaping, and focusing on the laser beam to ensure that it can be uniformly irradiated onto the display medium 10 in a linear form. By adjusting the output parameters of the laser generator and the configuration of the optical corrector, it is possible to achieve fine control of the intensity, direction, and shape of the second light, which helps to improve the performance and display effect of the display device 100.

[0065] In some embodiments, the first light and the second light meet in the display medium 10 and excite elements in the stimulated luminescent material to undergo transitions to emit fluorescence, thereby ensuring high resolution and color accuracy of the image.

[0066] Exemplarily, the display medium 10 includes nano-crystal glass. The up-conversion luminescence of nano-crystal glass depends on rare earth ions (such as Er 3+ 、Tm 3+ , Yb 3+ After absorbing low-energy infrared light, these ions transition to high energy levels through multiphoton absorption processes (such as energy transfer upconversion or photon avalanche upconversion), and finally emit visible light or ultraviolet light.

[0067] In some embodiments, the first light and the second light are incident on the display medium 10 from vertical adjacent interfaces respectively, so that the intersection point of the two light beams can be precisely controlled, thereby achieving high-resolution and high-contrast image display, and at the same time, it helps to reduce the reflection and scattering of the first light and the second light on the surface of the display medium 10, thereby reducing the interference of external light on the display effect.

[0068] In some embodiments, the control unit 40 is electrically coupled to the first light emitting unit 20 and the second light emitting unit 30, respectively, for controlling the first light emitting unit 20 to emit the first light and controlling the second light emitting unit 30 to emit the second light. The control unit 40 includes intelligent control devices such as microprocessors or microcontrollers, which can accurately control the light emitting units according to preset programs or instructions. For example, the control unit 40 can accurately control the light emitting time, intensity and wavelength of the first light emitting unit 20 and the second light emitting unit 30. This precise control ensures that the first light and the second light can accurately intersect in the display medium 10 to stimulate the stimulated luminescent material to emit light. At the same time, the control unit 40 can adjust the emission frequency and intensity of the light through pulse control or modulation signals, thereby realizing dynamic image display. The control unit 40 can dynamically adjust the parameters of the first light and the second light according to different application scenarios and display requirements, so that the display device 100 can adapt to different environmental conditions and user needs.

[0069] For example, Figure 1 As shown, the control unit 40 generates a control signal for controlling the reflective device 22 and loads it to the reflective device 22 projection device. The control unit 40 drives the first light source 21 to emit 852nm laser to irradiate the reflective device 22. After being reflected by the reflective device 22, the original image information is output. After the original image information passes through the focusing lens 23, the light beam converges on the display medium 10. The control unit 40 drives the second light source 31 to emit 1530nm laser. The laser is converted into a line light source after passing through the internal optical corrector. The line light source is focused on the display medium 10. The 852nm laser carrying the image information intersects with the 1530nm line light source at the focus, stimulating the elements in the material to undergo transition and emit fluorescence, thereby reproducing the suspended image. The generated spatial suspended image is clear and has no smear, and a three-dimensional suspended display can be realized.

[0070] In some embodiments, Figure 3 As shown, the first light-emitting unit 20, the second light-emitting unit 30 and the control unit 40 can be integrated into the optical-mechanical system 70. This integrated design can achieve a more compact structural layout and more efficient optical and control collaboration. At the same time, the integrated design helps to optimize the connection and communication between the components and reduce energy loss and signal interference. This can improve the energy utilization efficiency and signal transmission quality of the entire optical-mechanical system.

[0071] Based on the same inventive concept, an embodiment of the present application provides a vehicle, the vehicle comprising the display device described in any embodiment of the present application, and the display device is arranged on the front windshield of the vehicle.

[0072] Optionally, the vehicle may be a car, a rail vehicle, or an airplane, etc. The specific technical features and technical effects of the vehicle provided in the embodiment of the present application are consistent with the technical features and technical effects of the display device, and will not be described in detail in the present application.

[0073] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0074] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0075] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the known power supply / ground connection with the integrated circuit (IC) chip and other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform to be implemented in the embodiments of the present application (that is, these details should be fully within the scope of understanding of those skilled in the art). In the case of elaborating specific details (e.g., circuits) to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0076] Although the present application has been described in conjunction with specific embodiments of the present application, many replacements, modifications and variations of these embodiments will be apparent to those skilled in the art based on the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.

[0077] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A display device, characterized in that: include: A display medium comprises a first side, a second side and a third side connected in sequence, wherein the display medium comprises a stimulated luminescent material; The first side and the second side are used to receive a first light and a second light from a first direction and a second direction respectively, the first side is opposite to the third side, the first light includes image information to be displayed, the wavelength of the second light is different from the wavelength of the first light, the first light and the second light meet in the display medium and excite the stimulated luminescent material to emit light so as to display the image corresponding to the image information to be displayed from the third side; A first light emitting unit, disposed on the first side and / or the second side of the display medium, and configured to emit the first light; A second light emitting unit, disposed on the second side of the display medium, for emitting the second light; The control unit is electrically coupled to the first light emitting unit and the second light emitting unit, respectively, and is used to control the first light emitting unit to emit the first light and control the second light emitting unit to emit the second light.

2. The display device according to claim 1, characterized in that The stimulated luminescent material includes an up-conversion luminescent material, and / or the display medium includes nano-crystalline glass.

3. The display device according to claim 1, characterized in that The wavelength of the first light is shorter than the wavelength of the second light; and / or The wavelength of the first light is 800-900 nm; and / or The wavelength of the second light is 1500-1600 nm.

4. The display device according to any one of claims 1 to 3, characterized in that: The first light and the second light meet in the display medium and excite elements in the stimulated luminescent material to undergo transition to emit fluorescence.

5. The display device according to claim 1, characterized in that The second light includes linear light emitted by a line light source. The second light forms a linear light band when irradiated into the display medium. The first light and the second light intersect in the display medium and excite the stimulated luminescent material to emit light so as to display the image corresponding to the image information to be displayed as a suspended three-dimensional image.

6. The display device according to claim 1, characterized in that: The first light emitting unit includes a first light source, a reflective device, and a focusing lens, wherein the first light source is located on the second side of the display medium, the reflective device and the focusing lens are located on the first side of the display medium, and the first light emitted from the second side by the first light source is reflected to the first side by the reflective device and focused by the focusing lens before entering the first side of the display medium; The second light emitting unit includes a second light source located at the second side of the display medium, and the second light emitted by the second light source is incident from the second side of the display medium.

7. The display device according to claim 6, characterized in that: The first light and the second light are lasers.

8. The display device according to claim 6, characterized in that: The display medium is a right-angled trapezoidal prism structure, the third side corresponds to the inclined surface of the right-angled trapezoidal prism structure, the second side corresponds to the first surface of the right-angled trapezoidal prism structure connected to the inclined surface, and the first side corresponds to the second surface of the right-angled trapezoidal prism structure connected to the first surface; or The display medium is a cylindrical structure, the first side and the third side correspond to two planes of the cylindrical structure respectively, and the second side corresponds to a side surface of the cylindrical structure.

9. The display device according to claim 8, characterized in that: The display device includes a vehicle-mounted display device or an aircraft-mounted display device; The display medium of the right-angled trapezoidal prism structure further comprises a third surface connected to the inclined surface and the second surface, and the third surface is arranged on the front windshield; or When the display medium is a cylindrical structure, the reflective device is arranged on the front windshield, and the inclination angle of the reflective surface of the reflective device is the same as the inclination angle of the front windshield.

10. The display device according to claim 6, characterized in that: The reflective device is a digital micro-mirror device; and / or The second light source comprises: A laser generator, used to generate laser light; The optical corrector is used to convert the laser into the line light source to emit linear light as the second light.

11. The display device according to claim 1, characterized in that: The display device includes a head-up display device.

12. A means of transport, characterized in that: The vehicle comprises the display device according to any one of claims 1 to 11, and the display device is arranged on the front windshield of the vehicle.

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