CN216526752U

CN216526752U - Holographic keyboard, holographic fountain and holographic firework

Info

Publication number: CN216526752U
Application number: CN202121193233.XU
Authority: CN
Inventors: 徐俊峰; 方涛; 吴慧军; 陈川
Original assignee: Futurus Technology Co Ltd
Current assignee: Futurus Technology Co Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-05-13
Anticipated expiration: 2031-05-31

Abstract

The present disclosure provides a holographic keyboard, a holographic fountain and a holographic firework, wherein the holographic keyboard comprises; the method comprises the following steps: a housing; a display component; and a controller, a collector and a player; the display component is configured to emit imaging light rays of imaging contents at least including keys, so that the imaging light rays are emitted to an area far away from the shell through the light outlet and form a real image; the input end of the controller is connected with the output end of the collector, and the output end of the controller is connected with the input end of the display component and the input end of the player; the collector is configured to collect the area information of the touched real image, the controller is configured to control the display assembly to emit imaging light rays of which the imaging contents at least comprise changed keys matched with the area information based on the area information, and the controller is further configured to control the player to play audio matched with the area information. The method can solve the problems of poor imaging effect and insufficient definition of the traditional holographic device.

Description

Holographic keyboard, holographic fountain and holographic firework

Technical Field

The disclosure relates to a holographic keyboard, a holographic fountain and a holographic firework.

Background

The traditional holographic device is poor in imaging effect, not clear enough in imaging, seriously influences the display effect, causes sense organ and aesthetic fatigue of people, and urgently needs to develop a display project or an imaging display system which is stronger in novelty, stronger in scientific and technological properties and deeper in sense organ.

Disclosure of Invention

The embodiment of the disclosure provides a holographic keyboard, a holographic fountain and a holographic firework, and can solve the problems of poor imaging effect and insufficient definition of imaging of a traditional holographic device.

At least one embodiment of the present disclosure provides a holographic keyboard, including: a housing having a light exit; a display assembly disposed within the housing; and a controller, a collector and a player; the display component is configured to emit imaging light rays of imaging contents at least including keys, so that the imaging light rays are emitted to an area far away from the shell through the light outlet and form a real image; the input end of the controller is connected with the output end of the collector, and the output end of the controller is connected with the input end of the display component and the input end of the player; the collector is configured to collect area information of the real image touched, the controller is configured to control the display assembly to emit imaging contents including at least imaging light of the changed keys matched with the area information based on the area information, and the controller is further configured to control the player to play audio matched with the area information.

In some examples, the display assembly includes an image source, a transflective member, and an opposing reflective element; the image source is configured to emit imaging light rays of which imaging contents at least comprise keys, the transflective piece reflects the imaging light rays emitted by the image source to the opposite reflection element, the opposite reflection element reflects the imaging light rays reflected by the transflective piece to the transflective piece along a direction opposite to an incident direction, and the opposite reflection piece transmits the imaging light rays reflected by the opposite reflection element, so that the imaging light rays are emitted to an area far away from the shell through the light outlet and form a real image.

In some examples, the transflective member is disposed at the light exit port.

In some examples, the display assembly further comprises a phase delay element; wherein the transflective member comprises a polarizing transflective element configured to reflect light having a first polarization characteristic incident thereto and to transmit light having a second polarization characteristic, wherein the first polarization characteristic is different from the second polarization characteristic; the imaging light emitted by the image source comprises light with a first polarization characteristic, the polarization transflective element reflects the light with the first polarization characteristic emitted by the image source to the phase delay element, the phase delay element performs a first phase change on the light having the first polarization characteristic, the opposite direction reflecting element reflects the light after the first time of phase change to the phase delay element along the direction opposite to the incident direction, the phase delay element performs a second phase change on the light after the first phase change, the light after the second phase change comprises light with a second polarization characteristic, the polarization transflective element transmits the light with the second polarization characteristic to the light outlet, so that the light with the second polarization characteristic is emitted to an area far away from the shell through the light outlet and forms a real image.

In some examples, the display assembly further comprises a polarization absorbing element; the polarization absorption element is arranged on one side of the polarization transflective element far away from the image source, and is configured to absorb the light with the first polarization characteristic and transmit the light with the second polarization characteristic.

In some examples, the image source comprises: at least one light source module; a light diffusing element; and an image-generating layer; wherein the light source module is configured to emit source light, the light diffusing element is configured to diffuse the source light, and the image generation layer is configured to convert the source light into imaging light whose imaging content includes at least keys.

In some examples, the light diffusing elements include a plurality of light diffusing elements sequentially arranged on an exit light path of the source light, and adjacent light diffusing elements are spaced apart by a predetermined distance.

At least one embodiment of the present disclosure also provides a holographic fountain, comprising: a housing having a light outlet; the display assembly and the battery are arranged in the shell; the display assembly is configured to emit imaging light with imaging content at least including a fountain, so that the imaging light is emitted to an area far away from the shell through the light outlet and forms a real image, and the battery is configured to supply power to the display assembly; wherein the outer surface of the shell is provided with a heat conduction layer.

In some examples, the display assembly includes an image source, a transflective member, and an opposite direction reflective element, and the light outlet includes a first sub light outlet and a second sub light outlet disposed at both sides of the housing; the image source is configured to emit imaging light rays with imaging contents at least comprising a fountain, the transflective member reflects a part of the imaging light rays emitted by the image source to a first sub light outlet and transmits another part of the imaging light rays to the opposite direction reflection element, so that the part of the imaging light rays are emitted to an area far away from the shell through the first sub light outlet and form a virtual image, the other part of the imaging light rays are reflected to the transflective member through the opposite direction reflection element, and the transflective member transmits the other part of the imaging light rays reflected by the opposite direction reflection element to a second sub light outlet, so that the other part of the imaging light rays are emitted to the area far away from the shell through the second sub light outlet and form a real image; wherein the imaging positions of the real image and the virtual image coincide.

In some examples, the display assembly further comprises a phase delay element; wherein the transflective member comprises a polarizing transflective element configured to reflect light having a first polarization characteristic incident thereto and transmit light having a second polarization characteristic, wherein the first polarization characteristic is different from the second polarization characteristic; the imaging light emitted by the image source comprises light with a first polarization characteristic and light with a second polarization characteristic, the polarization transflective element reflects the light with the first polarization characteristic emitted by the image source to a first sub light outlet and transmits the light with the second polarization characteristic to the phase delay element, so that the light with the first polarization characteristic is emitted to an area far away from the shell through the first sub light outlet to form a virtual image, the phase delay element performs a first phase change on the light with the second polarization characteristic, the opposite direction reflecting element reflects the light after the first phase change to the phase delay element along a direction opposite to an incident direction, the phase delay element performs a second phase change on the light after the first phase change, and the light after the second phase change comprises the light with the first polarization characteristic, the polarization transflective member reflects the light with the first polarization characteristic to the second sub light outlet, so that the light with the first polarization characteristic is emitted to an area far away from the shell through the second sub light outlet and forms a real image.

In some examples, the opposite direction reflection element and the image source are located on two sides of the transflective member, and the first sub light outlet and the second sub light outlet are located on two sides of the transflective member.

In some examples, the angle between the image source and the transflective member is 45 degrees.

In some examples, the first sub light outlet and the second sub light outlet are respectively provided with a light-transmitting plate for sealing.

In some examples, the outer surface of the housing is further provided with a water barrier.

In some examples, further comprising: a player; wherein the player is configured to play audio that matches the imaging content.

In some examples, the imaging light includes at least one of red light, green light, or blue light.

In some examples, further comprising: a light blocking element configured to block imaging light emitted by the image source at a preset angle.

In some examples, further comprising: a controller and a microphone; the input end of the controller is connected with the output end of the microphone, the output end of the controller is connected with the input end of the display component, the microphone is configured to collect audio information, and the controller is configured to control the display component to emit imaging light matched with the audio information based on the audio information.

At least one embodiment of the present disclosure also provides a holographic firework, including: a housing having a light exit; and a display assembly disposed within the housing; the display assembly comprises an image source, a transflective piece and an opposite direction reflecting element; the image source is configured to emit imaging light rays of which imaging contents at least comprise fireworks, the transflective piece reflects the imaging light rays emitted by the image source to the opposite reflection element, the opposite reflection element reflects the imaging light rays reflected by the transflective piece to the transflective piece along a direction opposite to an incident direction, and the transflective piece transmits the imaging light rays reflected by the opposite reflection element, so that the imaging light rays are emitted to an area far away from the shell through the light outlet and form a real image; wherein, in the vertical direction, the distance between the image source and the transflective member is greater than a distance threshold.

In some examples, the transflective member is disposed at the light exit port.

In the above scheme provided by the embodiment of the invention, on one hand, the formed real image can be touched by a user, the imaging effect is good, the imaging is clear, and the use experience of the user can be increased; on the other hand, the structure is simple, and the advantages of low cost and simple process are achieved; on the other hand, the method has strong technological sense and can improve the use interest of users.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

FIG. 1 illustrates a schematic structural diagram of a holographic keyboard provided by at least one embodiment of the present disclosure;

fig. 2 illustrates a schematic structural diagram between a controller and a collector in at least one embodiment of the present disclosure;

FIG. 3 illustrates a schematic structural diagram of a display assembly in at least one embodiment of the present disclosure;

FIG. 4 illustrates an optical path diagram of imaging light rays propagating through an opposing reflective element in at least one embodiment of the present disclosure;

5-6 illustrate schematic structural views of a display assembly in at least one embodiment of the present disclosure;

FIG. 7 illustrates an optical path diagram of imaging light propagating through a polarization transflector element and a phase retarder element in at least one embodiment of the disclosure;

FIG. 8 illustrates a schematic structural diagram of a polarization absorbing element in at least one embodiment of the present disclosure;

FIG. 9 illustrates a schematic structural diagram of an image source in at least one embodiment of the present disclosure;

10-12 illustrate schematic structural diagrams between a light diffusing element and an image generating layer in at least one embodiment of the present disclosure;

fig. 13-15 illustrate schematic structural views of a light source module in at least one embodiment of the present disclosure;

16-18 illustrate schematic structural views of a solid transparent member in at least one embodiment of the present disclosure;

19-20 illustrate schematic structural views of a hollow lamp cup in at least one embodiment of the present disclosure;

fig. 21 illustrates a schematic structure of a light guiding element in at least one embodiment of the present disclosure;

FIG. 22 illustrates a schematic structural diagram between a controller and a player in at least one embodiment of the present disclosure;

fig. 23 illustrates a schematic structural view of a holographic fountain provided by at least one embodiment of the present disclosure;

FIG. 24 illustrates a schematic structural diagram between a battery and a display assembly in at least one embodiment of the present disclosure;

FIG. 25 illustrates a schematic structural view of a light blocking element in at least one embodiment of the present disclosure;

fig. 26 illustrates a schematic structural diagram between a controller and a microphone in at least one embodiment of the present disclosure;

fig. 27 shows a schematic structural diagram of a holographic firework provided by at least one embodiment of the present disclosure;

fig. 28 illustrates a schematic structural diagram of a display assembly in at least one embodiment of the present disclosure.

Description of the reference symbols: 10. a housing; 20. a light outlet; 21. a first sub light outlet; 22. a second sub light outlet; 23. a light-transmitting plate; 24. a battery; 30. a display component; 31. an image source; 311. a light source module; 3111. a light source; 3112. a polarization beam splitting element; 3113. a reflective element; 3114. a polarization conversion element; 3115. a light guide element; 31151. a solid transparent member; 311511, a light emitting surface; 311512, a cavity; 311513, a groove; 31152. a hollow lamp cup; 311521, light exit openings; 311522, open-ended; 31153. a collimating element; 312. a light diffusing element; 313. an image-generating layer; 32. a transflective member; 33. an opposite reflection element; 34. a phase delay element; 35. a light blocking element; 36. a polarization absorbing element; 37. a light blocking element; 40. a controller; 50. a player; 60. a collector; 70. real images; 80. a virtual image; 90. a microphone.

Detailed Description

The following describes embodiments of the present invention with reference to the accompanying drawings.

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.

It should be noted that for simplicity and clarity of illustration, the following describes several representative embodiments of the present invention. Numerous details of the embodiments are set forth to provide an understanding of the principles of the invention. It will be apparent, however, that the invention may be practiced without these specific details. Some embodiments are not described in detail, but rather are merely provided as frameworks, in order to avoid unnecessarily obscuring aspects of the invention. Hereinafter, "comprising" means "including but not limited to", "according to … …" means "at least according to … …, but not limited to … … only". "first," "second," and the like are used merely as references to features and are not intended to limit the features in any way, such as in any order. In view of the language convention of chinese, the following description, when it does not specifically state the number of a component, means that the component may be one or more, or may be understood as at least one.

The inventor of the present disclosure finds in research that the conventional holographic device has poor imaging effect, the imaging is not clear enough, the display effect is seriously affected, the sense organ and the aesthetic fatigue of people are caused, and the development of a display project or an imaging display system with stronger novelty, stronger science and technology and deeper sense organ is urgently needed.

To solve the above-mentioned problems, in one aspect, at least one embodiment of the present disclosure provides a holographic keyboard, as shown in fig. 1, including a housing 10 having a light outlet 20, a display assembly 30 disposed in the housing 10, and a controller 40, a collector 60, and a player 50 (the display assembly 30, the controller 40, and the collector 60 are not shown in fig. 1).

For example, the display assembly 30 is configured to emit imaging light rays with imaging contents at least including keys, the imaging light rays are emitted to an area far away from the casing 10 through the light outlet 20 and form a real image 70, the real image 70 formed in the area far away from the casing 10 at least includes the imaging contents of the keys, and the real image 70 floats in the air and can be observed and touched by a user to simulate a scene of pressing the keys (such as playing a piano), so that a good sensory experience is achieved.

For example, the keys may include at least one of piano keys, electronic piano keys, or other keys.

For example, the controller 40 may be a unit or device having a control function, such as a single chip microcomputer; the collector 60 may be a unit or a device having a function of collecting an image, such as at least one of an image sensor or an infrared sensor; the player 50 may be a unit or device having audio playing, such as a speaker.

In at least one embodiment of the present disclosure, referring to fig. 2, the controller 40 includes an output terminal and an input terminal, the input terminal of the controller 40 is connected to the output terminal of the collector 60, and the output terminal of the controller 40 is connected to the input terminal of the display assembly 30 and the input terminal of the player 50, respectively.

For example, the collector 60 is configured to collect the region information of the touched real image 70, the controller 40 is configured to control the display assembly 30 to emit the imaging light including at least the changed key matching the region information based on the region information, and the controller 40 is further configured to control the player 50 to play the audio matching the region information.

In at least one embodiment of the present disclosure, "modified key" may be understood as: at least one of the keys is depressed or lifted.

In the embodiment of the present disclosure, on one hand, the real image 70, which forms the imaging content including at least the keys, is touchable by the user, the imaging effect is good, the imaging is clear, and the use experience of the user can be increased; on the other hand, when the user touches the real image 70, the collector 60 collects corresponding area information after the user touches, so as to know the touch position of the user on the key, and the controller 40 controls the display assembly 30 to emit the imaging light of the changed key, the imaging content of which is at least matched with the area, based on the obtained area information, so as to simulate the action scene of the user pressing the key, and the method has the advantages of low cost and simple process; on the other hand, the controller 40 may also control the player 50 to play the audio matched with the region information based on the region information, so as to simulate the sound scene of the key pressed by the user, thereby improving the interaction performance of the user; in another aspect, the holographic keyboard has a strong technological sense, and the use interest of the user can be improved.

In some embodiments, the housing 10 may be any shape, such as a cube, a cuboid, a sphere, or a prism; referring to fig. 1, the housing 10 includes a rectangular parallelepiped shape, and the rectangular housing 10 is easy to process and is difficult to manufacture. For example, the housing 10 may be made of a light-impermeable material, such as black plastic; the housing 10 made of opaque material can avoid the influence of external light on the imaging of the imaging light, and can also avoid the situation that a user directly sees the components inside the housing 10.

For example, referring to fig. 3, the display assembly 30 may include an image source 31, a transflective member 32, and an opposite reflective member 33, wherein the image source 31 is configured to emit imaging light rays whose imaging content includes at least keys, the transflective member 32 reflects the imaging light rays emitted from the image source 31 to the opposite reflective member 33, the opposite reflective member 33 reflects the imaging light rays reflected by the transflective member 32 to the transflective member 32 in a direction opposite to the incident direction, and the transflective member 32 transmits the imaging light rays reflected by the opposite reflective member 33, so that the imaging light rays are emitted to an area away from the housing 10 through the light outlet 20 and form a real image 70.

For example, the image source 31 includes a display device capable of Emitting imaging Light, and may be an active Light-Emitting dot matrix display screen composed of a Light-Emitting point Light source 3111 such as a liquid crystal display (lcd), an Organic Light-Emitting Diode (OLED), a plasma Light-Emitting point, etc.; the projection imaging system may be based on projection technologies such as dlp (digital Light processing), LCOS (liquid Crystal on silicon), liquid Crystal, etc., and driven by a Light source 3111 such as LED, OLED, laser, fluorescent Light, etc., or a combination thereof, reflected or transmitted by a display panel such as dmd (digital micro device), LCOS, LCD, etc., and projected by a projection lens to form an image on a projection screen; it may also be a projection imaging system in which a laser beam is scanned and imaged onto a screen.

For example, the transflective member 32 may be made of a transparent material, such as glass, quartz, resin, or polymer, and can transmit and reflect light simultaneously. That is, when the imaging light emitted from the image source 31 is incident on the transflective member 32, a portion of the imaging light may be reflected by the transflective member 32, and another portion of the imaging light may be transmitted by the transflective member 32.

For example, the reflectivity of the transflective member 32 may be between 20% and 90%, and the transmissivity thereof may be between 20% and 90%; for example, the reflective element 32 may have a reflectivity and a transmissivity that sum to 100%, and the reflectivity and transmissivity may be inversely related, such as 70%/50%/30% when the reflective element 32 has a reflectivity of 30%/50%/70%.

For example, referring to fig. 4, the opposite direction reflecting element 33 may reflect the light incident thereto in a reverse direction opposite to the incident direction, for example, the opposite direction reflecting element 33 may reflect the image light reflected by the transreflective member 32 in a direction opposite to the incident direction to the transreflective member 32.

It is understood that the imaging light is reflected oppositely on the opposite direction reflecting element 33, so that the reflected imaging light on the opposite direction reflecting element 33 can be in the same path with the incident imaging light, but in the opposite direction, therefore, the imaging light is reflected by the opposite direction reflecting element 33 and then exits along the original incident path (it should be understood that the reflected path and the incident path are slightly shifted when viewed microscopically, and the two paths are completely overlapped when viewed macroscopically).

For example, the microstructures may include at least one of a solid transparent rectangular vertex microstructure, a solid transparent spherical microstructure, or a hollow recessed rectangular vertex microstructure distributed on the surface of the substrate.

For example, the opposite direction reflection element 33 includes a substrate, and the solid transparent microstructures and the hollow concave microstructures may be distributed on the substrate.

For example, the opposite direction reflection element 33 includes a substrate provided with a reflection coating, and microstructures distributed on the substrate, the reflection coating may have a reflectivity of 60%, 70%, 80%, or 90% or more, and the reflection coating may be attached to the substrate by coating or plating.

For example, a reflective coating may be understood as a coating that has a reflectivity that is greater than a transmissivity of light incident upon it. For example, the reflective coating may be a metallic reflective layer.

For example, the reflective coating can be attached to the surface of the microstructure facing the substrate, or to the area where the microstructure meets the substrate.

For example, for a hollow concave right-angle vertex microstructure, light rays are emitted after three times of reflection mainly on three right-angle triangular surfaces; for the right-angle vertex microstructure made of solid transparent materials, light rays are emitted after three times of total reflection mainly on three right-angle triangular surfaces, and when a reflection coating is arranged, the light rays can be further reflected; for the solid spherical microstructure made of transparent materials, light rays are mainly reflected and emitted at the junction of the spherical microstructure and the reflective coating.

For example, the opposite direction reflecting element 33 also has a curvature curved toward the transflective member 32, and as shown in fig. 5, when imaging light rays of different incident angles are reflected to the opposite direction reflecting element 33 via the transflective member 32, the incident angles of the imaging light rays incident on different regions are different. Generally, imaging light rays with small incident angles (or near normal incidence) have high efficiency of opposite reflection, while light rays with large incident angles have poor efficiency of opposite reflection, for example, light rays incident on the edge of the opposite reflection element 33 have large incident angles, which results in poor efficiency of opposite reflection. The curved counter-reflective element 33 is advantageous for reducing the incident angle of the incident imaging light on the counter-reflective element 33, and the smaller the incident angle, the higher the counter-reflective efficiency, so as to improve the brightness of the formed real image 70.

For example, the efficiency of the counter reflection can be understood as: the ratio of the outgoing reflected imaging light to the incoming imaging light, such as the ratio of the luminous flux of the reflected imaging light to the luminous flux of the incoming imaging light; the curved counter-reflective element 33 is advantageous for reducing the incident angle of the incident imaging light on the counter-reflective element 33, the smaller the angle of the incident angle, the better the counter-reflective effect, so as to improve the brightness of the formed real image 70.

For example, the imaging light rays form a real image 70 in a region away from the housing 10 and the image source 31 are symmetrical with respect to the transflective member 32, and the imaging position of the imaging light rays can be changed by setting the position of the image source 31 with respect to the transflective member 32, for example, the position of the image source 31 in the housing 10.

For example, referring to fig. 1, the housing 10 has a square structure, the light outlet 20 is located on the top surface of the housing 10, and the plane of the light outlet 20 may be a horizontal plane; the image source 31 is disposed perpendicular to the horizontal plane, that is, perpendicular to the top surface of the housing 10; the transflective member 32 may be disposed at the light outlet 20, and may completely or partially cover the light outlet 20; the light-transmitting and reflecting member 32 can completely cover the light outlet 20 and can also seal the light outlet 20, so as to prevent external dust from entering the housing 10 through the light outlet 20.

For example, the transflective member 32 may be disposed at the light outlet 20 parallel to the horizontal plane, that is, parallel to the top surface of the casing 10, the image source 31 is perpendicular to the transflective member 32, and the real image 70 formed by the display assembly 30 is also perpendicular to the top surface of the casing 10, so as to facilitate the viewing of the user and improve the use experience.

In some embodiments, the angle between the transflector 32 and the opposing reflective element 33 may be 25 ° to 35 °, such as 30 °. Because the user is generally in a sitting posture when using the holographic keyboard proposed by at least one embodiment of the present disclosure, the observation effect of the real image 70 is better when the two eyes of the user, the real image 70 (e.g., the center of the real image 70) and the opposite direction reflecting element 33 (e.g., the center of the opposite direction reflecting element 33) are at or near the same straight line; by combining the factors of average height of people, ergonomics and the like, when the included angle between the transflective piece 32 and the opposite direction reflecting element 33 is close to or 30 degrees, the two eyes and the elements are positioned on or close to the same straight line, and the viewing effect of the real image 70 is better, so that the user can conveniently view the real image, and the use experience of the holographic keyboard is improved.

The inventor of the present disclosure also finds in research that the utilization rate of the imaging light can be improved by providing the phase retardation element 34 and the polarization transflective element to improve the imaging effect.

In at least one embodiment of the present disclosure, the display assembly 30 further comprises a phase retarding element 34 and the transflective member 32 comprises a polarizing transflective element, wherein the polarizing transflective element is configured to reflect light having a first polarization characteristic incident thereto and transmit light having a second polarization characteristic, wherein the first polarization characteristic is different from the second polarization characteristic.

For example, the "polarization characteristic" described in at least one embodiment of the present disclosure may mean that the polarization state of the light includes the polarization characteristic, for example, the horizontally linearly polarized light includes the horizontally linearly polarized characteristic, and may also mean that the light may be decomposed or equivalently include the polarization characteristic, for example, the natural light (unpolarized light) may be decomposed into the horizontally linearly polarized state and the vertically linearly polarized state, and the natural light may be considered to include the light including the horizontally linearly polarized characteristic and the light including the vertically linearly polarized characteristic.

For example, the imaging light emitted from the image source 31 includes light having a first polarization characteristic, the polarization transflective element reflects the light having the first polarization characteristic emitted from the image source 31 to the phase retarder 34, the phase retarder 34 performs a first phase change on the light having the first polarization characteristic, the opposite reflecting element 33 reflects the light having the first phase change to the phase retarder 34 along a direction opposite to the incident direction, the phase retarder 34 performs a second phase change on the light having the first phase change, the light having the second phase change becomes a light having a second polarization characteristic, and the polarization transflective element transmits the light having the second polarization characteristic to the light outlet 20, so that the light having the second polarization characteristic is emitted to a region far away from the housing 10 through the light outlet 20 and forms the real image 70; the phase delay element 34 can change the polarization characteristics of the imaging light, so that as much light as possible can be utilized for imaging, and the utilization rate and the imaging effect of the imaging light are improved.

For example, the first polarization characteristic may be orthogonal to the second polarization characteristic, the first polarization characteristic may be a left-handed elliptical polarization characteristic, and the second polarization characteristic may be a right-handed elliptical polarization characteristic, or vice versa; alternatively, the first polarization characteristic may be a left-handed circular polarization characteristic and the second polarization characteristic may be a right-handed circular polarization characteristic, or vice versa; alternatively, the first polarization characteristic may be a vertical linear polarization characteristic, such as an S polarization characteristic, and the second polarization characteristic may be a horizontal linear polarization characteristic, such as a P polarization characteristic, or vice versa.

For example, the phase retarding element 34 may include a quarter wave plate.

For example, the quarter-wave plate may be an integrally formed wave plate, or may be a wave plate in which two eighth-wave plates are combined.

For example, referring to fig. 6, the phase retardation member 34 may be disposed on a side of the counter-reflective member 33 close to the polarization transflective member.

For example, the polarization transflective element may be a polarization beam splitter, or may be a polarization splitting film, and the polarization splitting film may be a single film layer or a stack of a plurality of film layers, and the composition of the film layer may be at least one selected from metal oxides, metal nitrides, metal oxynitrides, fluorides, and organic polymers, and may be one or more selected from tantalum pentoxide, titanium dioxide, magnesium oxide, zinc oxide, zirconium oxide, silicon dioxide, magnesium fluoride, silicon nitride, silicon oxynitride, and aluminum fluoride, for example.

In at least one embodiment of the present disclosure, the plurality or plurality may be understood to include at least two or more.

For example, the polarizing transflector may be provided separately, e.g., the transflector 32 itself may be the polarizing transflector; alternatively, the transflective member 32 includes a transparent substrate, and the polarizing transflective element may be disposed (e.g., attached or plated) on a surface of the transparent substrate such that the transflective member 32 as a whole has polarizing transflective properties, and the transparent substrate may be understood as an element of non-polarization selective properties (e.g., glass) that primarily serves as a support for the polarizing transflective element, and the polarizing transflective properties of the transflective member 32 as a whole are primarily determined by the polarizing transflective element.

For example, the fact that the polarization transflective element reflects light having the first polarization characteristic and transmits light having the second polarization characteristic does not mean that the polarization transflective element reflects only light having the first polarization characteristic and transmits only light having the second polarization characteristic is understood that the reflectance thereof for light having the first polarization characteristic is greater than the reflectance thereof for light having the second polarization characteristic and the transmittance thereof for light having the second polarization characteristic is greater than the transmittance thereof for light having the first polarization characteristic. For example, when the first polarization characteristic is P-polarization and the second polarization characteristic is S-polarization, the polarization transflective element has a high reflectivity for P-light and a high transmissivity for S-light, such as the reflectivity of the polarization transflective element for P-light may be greater than 70%, 80% or 90%, and the transmissivity for S-light may also be greater than 70%, 80% or 90%.

Referring to fig. 7, the image source 31 emits the imaging light having a first polarization characteristic, illustratively, a P-polarization characteristic, and a second polarization characteristic, illustratively, an S-polarization characteristic, and the imaging light emitted by the image source 31 includes P-polarized light; the P-polarized light is reflected by the polarization transflective element, the reflected P-polarized light is converted into circularly polarized light after passing through the phase retarder 34, the circularly polarized light is converted into S-polarized light after being reflected by the opposite reflective element 33 and then passing through the phase retarder 34, and the S-polarized light is transmitted to the light outlet 20 through the polarization transflective element, so as to form a real image 70 in a region far away from the housing 10.

In at least one embodiment of the present disclosure, the above-mentioned "in the region away from the housing 10" may be understood as: the symmetrical position of the image source 31 with respect to the transflective member 32.

For example, in fig. 6, for explaining the structural relationship, a gap exists between the phase delay element 34 and the opposite reflection element 33, but this does not mean or imply that there is a gap between the components in at least one embodiment of the present disclosure, and it is understood that the components may be disposed in a full-lamination manner, and there may be a certain gap.

For example, the phase retardation element 34 and the opposite reflection element 33 are disposed in a full-lamination manner, so that loss caused by a dielectric layer (e.g., an air layer) between the phase retardation element 34 and the opposite reflection element 33 can be reduced, as much light as possible can penetrate through the phase retardation element 34, the light utilization rate is improved, and the imaging brightness of the real image 70 is increased.

For example, the display assembly 30 further includes a polarization absorbing element configured to absorb light having a first polarization characteristic and transmit light having a second polarization characteristic.

For example, referring to fig. 8, the polarization absorbing element is disposed on the side of the polarization transflective element away from the image source 31, the imaging light having the first polarization characteristic emitted from the image source 31 is reflected on the polarization transflective element, the polarization state of the reflected imaging light is hardly changed, the imaging light having the first polarization characteristic is emitted to the counter reflecting element 33, the counter reflecting element 33 emits the imaging light having the first polarization characteristic in the opposite direction to the incident direction, and the imaging light having the first polarization characteristic changes its own polarization characteristic by the phase delay element 34 during propagation to be converted into the imaging light having the second polarization characteristic, the polarization transflective element transmits the imaging light having the second polarization characteristic, while the polarization absorbing element can almost only transmit the imaging light having the second polarization characteristic, and the imaging light having the polarization characteristic not completely converted or the missing imaging light having the first polarization characteristic is polarized The vibration absorption element absorbs the light, so that only the imaging light with the second polarization characteristic is transmitted as far as possible, the observation of the real image 70 by the user is prevented from being influenced by glare, ghost and the like caused by the light with the other polarization characteristics, and the viewing experience of the user is improved.

For example, referring to fig. 9, the image source 31 includes: at least one light source module 311, a light diffusion element 312 and an image generation layer; the light source module 311 is configured to emit source light, the light diffusing element 312 is configured to diffuse the source light, and the image generating layer is configured to convert the diffused source light into imaging light whose imaging content at least includes key.

For example, the light diffusing component 312 may diffuse and diffuse the source light to form source light with a plurality of exit angles, where, referring to fig. 10, fig. 10 exemplarily shows two edge source light with the largest diffusion angle, that is, the light diffusing component 312 diffuses the source light in a certain range, so as to improve the uniformity of the distribution of the source light, and further improve the imaging effect.

For example, the light diffusing element 312 may be a lower cost scattering optical element, such as: the source light can be scattered when passing through scattering optical elements such as the light homogenizing sheet, the source light can be transmitted to form different emergent angles and can be slightly diffracted, but the scattering of the source light plays a main role and has a large diffusion degree on the source light; alternatively, the light diffusing element 312 may be a Diffractive Optical Element (DOE) having a good diffusion effect control, such as a Beam Shaper (Beam Shaper); the source light can be scattered when penetrating through scattering optical elements such as light homogenizing sheets, the source light can be transmitted to form different emergent angles, a small amount of diffraction can also be generated, the scattering of the source light plays a main role, the diffusion degree of the source light is large, the diffraction optical elements mainly play a role in expanding light beams through diffraction on the left and right sides through specific microstructures designed on the surfaces, and the size and the shape of the diffused light beams are controllable.

For example, the light beam transformed by the source light after passing through the light diffusing element 312 has a specific shape in a cross section perpendicular to the propagation direction, and the light diffusing element 312 can diffuse the source light passing through it to form a light beam with a specific shape, and the shape of the cross section of the diffused light beam includes, but is not limited to, a circle, an ellipse, a square or a rectangle.

For example, the number of the light diffusing elements 312 may include a plurality of light diffusing elements 312, and the light diffusing elements 312 are sequentially arranged on the emitting light path of the source light, and adjacent light diffusing elements 312 are spaced apart by a predetermined distance.

For example, the light diffusion elements 312 may diffuse the source light emitted from the light source module 311 multiple times, so that the imaging brightness of the image generation layer 313 is relatively uniform. Wherein the plurality of light diffusing elements 312 may be the same diffusing element, may be a diffractive optical element, such as a Beam Shaper (Beam Shaper), or the like; or may be a different diffusing element.

For example, the adjacent light diffusion elements 312 are spaced apart by a predetermined distance, which may be 5 to 30mm, for example, 10 to 20mm, and this is not limited by at least one embodiment of the present disclosure. Referring to fig. 10, the plurality of light diffusing elements 312 may each be disposed on the same side of the image generation layer 313; referring to fig. 11, two light diffusion elements 312 may be disposed at two sides of the image generation layer 313 in a dispersed manner, and the light diffusion element 312 disposed at the light exit side of the image generation layer 313 needs to be closely attached to the image generation layer 313 to avoid affecting imaging; referring to fig. 12, the light diffusion elements 312 may also be disposed in the light source module 311, and a predetermined distance is maintained between the light diffusion elements 312.

For example, the number of the light diffusion elements 312 may be two, and two light diffusion elements 312 not only can perform a good diffusion function on the source light, but also have a small overall thickness like the source 31; the number of light diffusion elements 312 may be further increased on the basis of two light diffusion elements 312.

For example, the light diffusing element 312 close to the light source module 311 may be set to have a specification that allows the source light to be diffused in a circular range, and the light diffusing element 312 distant from the light source module 311 may be set to have a specification that allows the source light to be diffused at an angle in the horizontal direction, thereby increasing the diffusing effect on the source light.

In some embodiments, image-generating layer 313 may include a liquid crystal panel that is generally only capable of utilizing light having a particular polarization characteristic, such as utilizing light having a second polarization characteristic; while the light emitted by the light source 3111 is typically unpolarized. The inventors of the present disclosure have found in their research that light emitted from the light source 3111 is converted into light having a specific polarization characteristic that can be utilized before reaching the image-generating layer 313, and thus the light utilization efficiency can be improved.

For example, the light source module 311 includes a light source 3111, a polarization beam splitter 3112, a reflector 3113 and a polarization converter 3114, wherein, the light emitted from the light source 3111 includes light with a first polarization characteristic and light with a second polarization characteristic, the polarization beam splitter 3112 is configured to split light incident thereon into light having a first polarization characteristic and light having a second polarization characteristic, the light having the first polarization characteristic is emitted to the light diffuser 312, the light having the second polarization characteristic is emitted to the reflector 3113, the reflector 3113 is configured to change a propagation direction of the light incident thereon to emit the light to the light diffuser 312, and the polarization converter 3114 is configured to convert light having a polarization characteristic that cannot be used by the image forming layer 313, out of the light having the first polarization characteristic and the light having the second polarization characteristic, into light having a polarization characteristic that can be used by the image forming layer 313.

In some embodiments, referring to fig. 13, the light emitted from the light source 3111 includes a light having a first polarization characteristic and a light having a second polarization characteristic, the light having the first polarization characteristic emitted from the light source 3111 is transmitted to the light diffusing element 312 through the polarization beam splitting element 3112, the light having the second polarization characteristic emitted from the light source 3111 is reflected to the reflecting element 3113 through the polarization beam splitting element 3112, the reflecting element 3113 reflects the light having the second polarization characteristic reflected by the polarization beam splitting element 3112 to the polarization conversion element 3114, and the polarization conversion element 3114 converts the light having the second polarization characteristic reflected by the reflecting element 3113 into the light having the first polarization characteristic to be diffused by the light diffusing element 312.

In other examples, referring to fig. 14, the light emitted from the light source 3111 includes light having a first polarization characteristic and light having a second polarization characteristic, the light having the second polarization characteristic emitted from the light source 3111 is transmitted to the polarization conversion element 3114 through the polarization beam splitter 3112, the polarization conversion element 3114 converts the light having the second polarization characteristic transmitted through the polarization beam splitter 3112 into light having the first polarization characteristic to be diffused by the light diffuser 312, the light having the first polarization characteristic emitted from the light source 3111 is reflected to the reflection element 3113 through the polarization beam splitter 3112, and the reflection element 3113 reflects the light having the first polarization characteristic reflected by the polarization beam splitter 3112 to the light diffuser 312.

In at least one embodiment of the present disclosure, through the above arrangement, the light having the second polarization characteristic, which cannot be utilized by the liquid crystal panel, is converted into the light having the first polarization characteristic, and the converted light is further utilized by the liquid crystal panel, so that the utilization rate of the light is improved.

For example, in the examples of fig. 13 and 14, the first polarization characteristic is S-polarization characteristic, and the second polarization characteristic is P-polarization characteristic.

For example, the light source 3111 may be a point light source 3111, a line light source 3111 or a surface light source 3111, and the number of the light sources 3111 may be one or more, which is not limited; the Light source 3111 includes at least one electroluminescent element that generates Light by electric Field excitation, including but not limited to Light Emitting Diode (LED), Organic Light Emitting Diode (OLED), Mini LED (Mini LED), Micro LED (Micro LED), Cold Cathode Fluorescent Lamp (CCFL), LED Cold Light source 3111(Cold LED Light, CLL), Electro Luminescence (EL), electron Emission (Field Emission Display, FED), or Quantum Dot Light source 3111(Quantum Dot, QD), etc.

For example, the light source 3111 may include 4 LED light bars, each of which includes 16 light beads, so as to ensure brightness of light.

For example, the polarization beam splitter 3112 includes an optical element that splits light by light transmission and light reflection, such as the polarization beam splitter 3112 may simultaneously transmit light having a first polarization characteristic and reflect light having a second polarization characteristic; the polarization beam splitter 3112 may be formed by coating or plating a film layer having a polarization transmitting/reflecting function on a surface of a transparent plate such as glass, quartz, or a high molecular polymer.

For example, the polarization beam splitter 3112 transmits light having the first polarization characteristic and reflects light having the second polarization characteristic, which does not mean that the polarization beam splitter 3112 transmits only light having the first polarization characteristic and reflects light having the second polarization characteristic, it is understood that the polarization beam splitter 3112 has a higher reflectance for light having the first polarization characteristic and a higher transmittance for light having the second polarization characteristic, such as the average transmittance of the polarization beam splitter 3112 for light having the first polarization characteristic is greater than 70%, 80% or 90%, and the average reflectance for light having the second polarization characteristic is greater than 70%, 80% or 90%; the embodiments and working principles of the polarization beam splitting film layer for splitting by light transmission and reflection are the above polarization transflective elements, and are not described herein again.

For example, the reflecting member 3113 may include a mirror plated with a metal layer, a polished metal plate, or the like, or may be a member having a polarization reflecting function like the polarization beam splitting member 3112 so that light can be reflected as efficiently as possible; for example, the reflective member 3113 may be made of the same material and have the same polarization reflection performance as the polarization beam splitter 3112, so as to facilitate installation of the elements in the display assembly 30.

For example, the polarization conversion element 3114 may be an element having a function of changing a phase of light passing therethrough, and the light having the second polarization characteristic may be converted into light having the first polarization characteristic after passing through the polarization conversion element 3114 one or more times, for example, the polarization conversion element 3114 may be an 1/2 wave plate, a 1/4 wave plate, or a 1/8 wave plate.

For example, referring to fig. 15, the light source module 311 further includes a light guide element 3115, wherein the light guide element 3115 may be disposed between the light source 3111 and the polarization beam splitter 3112.

For example, referring to fig. 16, the light guide 3115 includes a solid transparent member 31151 having a light-reflecting surface, the light-exiting surface 311511 of the solid transparent member 31151 faces the polarizing beam-splitting element 3112, and the light source 3111 is disposed at an end of the solid transparent member 31151 away from the light-exiting surface 311511.

Referring to fig. 16, the refractive index of the solid transparent member 31151 is greater than 1, the medium surrounding the solid transparent member 31151 is generally air (refractive index is 1), when a light ray with a large angle emitted from the light source 3111 reaches the inner surface of the solid transparent member 31151, when the light ray is emitted from the optically dense medium (i.e., the solid transparent member 31151) to the optically sparse medium (i.e., air), the incident angle of the light ray is equal to or greater than the total reflection angle, and total reflection occurs, that is, the reflective surface of the solid transparent member 31151 may refer to the inner surface of the solid transparent member 31151.

For example, a reflective coating may be further disposed outside the solid transparent member 31151, light emitted from the light source 3111 has a divergence angle (the maximum included angle between the normal of the center of the light source 3111 and the emitted light), light emitted from the light source 3111 is emitted from the light source 3111 to each direction within the divergence angle at a plurality of angles (the angle between the normal of the center of the light source 3111 and the emitted light) in which light with a smaller divergence angle (the angle between the normal of the center of the light source 3111 is smaller, for example, 10 degrees, 15 degrees, 20 degrees, etc.) is directly transmitted from the light source 3111 to the light-emitting surface 311511 to be emitted, light with a larger divergence angle (the angle between the normal of the center of the light source 3111 is larger, for example, 30 degrees, 45 degrees, 60 degrees, etc.) but light which does not satisfy the total reflection condition may further undergo specular reflection on the reflective coating, and the reflected light may converge, thereby improving the utilization rate of the light emitted from the light source 3111.

For example, the surface shape of the light reflecting surface of the solid transparent member 31151 may be designed to change the light reflected by the light reflecting surface into collimated light, where the collimated light is parallel or nearly parallel, and the divergence angle of the collimated light is smaller, which is more favorable for imaging.

For example, the refractive index of the solid transparent member 31151 is greater than 1, and the light-reflecting surface of the solid transparent member 31151 includes a curved surface shape, a free-form surface shape, a conical surface shape, or the like; the light exit surface 311511 of the solid transparent member 31151 faces the polarization beam splitting element 3112.

For example, the light exit surface 311511 of the solid transparent member 31151 faces the polarization beam splitter 3112, and by designing the shape of the solid transparent member 31151, a part of the light emitted from the light source 3111 is reflected and emitted with a reduced divergence angle; the other part of the light is directly transmitted and emitted through the solid transparent part 31151, and the two parts of the light are emitted to the polarization beam splitter 3112 through the light emitting surface 311511, so that the utilization rate of the light is improved.

For example, the cross-sectional shape of the light exit surface 311511 along the light propagation direction may include at least one shape of a circle, an ellipse, a rectangle, a trapezoid, a parallelogram, or a square; the shape of the end portion includes at least one of a circle, an ellipse, a rectangle, a trapezoid, a parallelogram, or a square.

For example, referring to fig. 17, the end of the solid transparent member 31151 may also be provided with a cavity 311512, the light source 3111 is disposed in the cavity 311512, and the collimating element 31153 is disposed in the cavity 311512 on a side thereof adjacent to the light exit surface 311511.

For example, the collimating element 31153 may collimate and emit light rays having a small divergence angle emitted from the light source 3111 in the solid transparent member 31151, and may emit light rays having a large divergence angle after reflecting on the light-reflecting surface of the solid transparent member 31151.

For example, the surface shape of the light reflecting surface of the solid transparent member 31151 may be designed to change the light reflected by the light reflecting surface into a collimated light, for example, the collimating element 31153 may be a collimating lens, the light source 3111 is disposed at the focus of the collimating lens, and the collimating lens may be made of at least partially the same material as the solid transparent member 31151, so as to facilitate integration.

For example, referring to fig. 18, the end of the solid transparent member 31151 where the light source 3111 is located may also be provided with a cavity 311512, and the light exit surface 311511 of the solid transparent member 31151 is provided with a groove 311513 extending towards the end, and the bottom surface of the groove 311513 near the end is provided with a collimating element 31153.

For example, the light source 3111 is disposed in the cavity 311512, the collimating element 31153 collimates the light with a small divergence angle emitted by the light source 3111 in the solid transparent member 31151 and emits the light, and the other light with a large divergence angle reflects in the solid transparent member 31151 and emits the light, and the light reflected by the reflecting surface can be made into collimated light by designing the surface shape of the reflecting surface of the solid transparent member 31151, for example, the collimating element 31153 may be a collimating lens, the light source 3111 is disposed at the focus of the collimating lens, and the collimating lens may be made of at least partially the same material as the solid transparent member 31151, so as to be integrated integrally.

For example, the light guide element 3115 may also be designed as a hollow lamp cup 31152, as shown in fig. 19, the hollow lamp cup 31152 includes a hollow housing 10 surrounded by a light reflecting surface, the hollow housing 10 includes a light exit opening 311521 and an end opening 311522, the light exit opening 311521 of the hollow lamp cup 31152 faces the direction control element, the end opening 311522 of the hollow lamp cup 31152 is used for disposing the light source 3111, and light emitted from the light source 3111 is reflected when entering the light reflecting surface, so that the light reflected by the light reflecting surface is emitted to the polarization beam splitter 3112.

For example, the reflective surface of the hollow housing 10 may include a metal film, such as aluminum, silver, or steel; alternatively, the light source 3111 may include a dielectric film, for example, a dielectric film is plated on the dielectric film, the light may be reflected on the reflective surface, and by disposing the hollow housing 10, the light with a relatively large divergence angle emitted by the light source 3111 is reflected on the reflective surface of the hollow housing 10, and the angle of the reflected light is changed and gathered to the center, so that the utilization rate of the light emitted by the light source 3111 may be increased, and the light efficiency may be further improved.

For example, the shape of the opening may include at least one of a circle, an ellipse, a rectangle, a trapezoid, a parallelogram, or a square; the shape of the end of hollow lamp cup 31152 remote from the opening includes at least one of a circle, an oval, a rectangle, a trapezoid, a parallelogram, or a square.

For example, the hollow case 10 may include at least one of a parabolic shape, a conic shape, or a free-form surface shape, and the shape of the hollow case 10 may refer to the shape of a light reflecting surface; it will be appreciated that the shape of the hollow housing 10 may be different from the shape of the light-reflecting surface, provided that the light-reflecting surface is of a shape that allows light to be reflected as described above; in at least one embodiment of the present disclosure, the hollow housing 10 conforms to the shape of the reflective surface for ease of illustration.

For example, the hollow lamp cup 31152 may also be provided with a collimating element 31153, the collimating element 31153 may be a collimating lens or a collimating film, the collimating lens includes one or more of a convex lens or a lens combination (e.g., a combination of a convex lens and a concave lens, a combination of a fresnel lens and a concave lens, etc.).

For example, the collimating element 31153 may be a convex lens, the light source 3111 may be disposed at a focal point of the convex lens, for example, a distance between the convex lens and the light source 3111 may be a focal length of the convex lens, so that light rays emitted by the light source 3111 in different directions may be emitted in parallel after passing through the collimating element 31153; alternatively, the collimating element 31153 may be a collimating Film, for example, a BEF Film (bright Enhancement Film), for adjusting the emitting direction of the light rays to a preset angle range, for example, to focus the light rays to an angle range of ± 35 ° from the normal of the collimating Film.

For example, the predetermined angular range may be a smaller divergence angular range, and the light within this range may be considered collimated light, or the light may be more collimated.

For example, the collimating element 31153 may cover all light emitted by the light source 3111, and may also cover a portion of light emitted by the light source 3111, which is not limited by at least one embodiment of the disclosure. The collimated light is subsequently transmitted to the image generation layer 313, the divergence angle of the light is small, the uniformity of the light is good, and therefore the conversion efficiency of the image generation layer 313 to the imaging light can be improved, and the lighting effect is improved.

For example, referring to fig. 20, a collimating element 31153 may be disposed inside the hollow housing 10 and configured to convert light passing through the collimating element 31153 into collimated light, for example, the collimating element 31153 may be a collimating lens or a collimating film, in the example of fig. 20, the collimating element 31153 is illustrated as a collimating lens, and the light source 3111 may be disposed at a focal point of the convex lens, that is, a distance between the convex lens and a position of the light source 3111 is a focal length of the convex lens, so that light emitted by the light source 3111 in different directions can be collimated after passing through the collimating element 31153.

For example, the collimating element 31153 collimates a part of the light transmitted in the hollow housing 10 and then outputs the collimated light to the polarization beam splitter 3112, where the part of the light may refer to the light emitted from the light source 3111 with a smaller divergence angle, and the collimated light passes through the collimating element 31153 and is converted into parallel or nearly parallel light; the light emitted from the light source 3111 with a large divergence angle is reflected by the reflective surface of the hollow housing 10 and converted into collimated light, and the light emitted from the light source 3111 can be collected and collimated more effectively by combining the collimating element 31153 and the hollow housing 10, so that the utilization rate of the light is further improved.

In at least one embodiment of the present disclosure, through the light guide element 3115 that sets up solid transparent material or the design of hollow shell 10, the light that has great divergence angle that the light source 3111 outgoing reflects at the reflective surface of hollow shell 10, the light after the reflection turns into collimated light, can improve the utilization ratio of the light that the light source 3111 outgoing, further through setting up collimating element 31153, can more effectively collimate the light that the light source 3111 outgoing, turn into parallel or nearly parallel collimated light with light, parallel light divergence angle after the collimation is very little, the uniformity of light is better, further improve the utilization ratio of light.

In some embodiments, the light guide element 3115 may have an elongated prism structure, and the light-emitting direction of the light guide element 3115 may be directed toward the transflective member 32, for example, an included angle between the light-emitting direction of the light guide element 3115 and the transflective member 32 is close to or equal to an included angle between the transflective member 32 and the opposite-direction reflective element 33, so that the imaging light emitted from the image source 31 may be directed toward the transflective member 32, so that as much imaging light as possible is reflected by the transflective member 32, and the utilization rate of the imaging light is improved, as shown in fig. 21 (in fig. 21, the light diffusing element 312 is not shown), and the included angle between the light-emitting direction of the light guide element 3115 and the transflective member 32 may be 15 ° to 60 °, for example, the included angle is 30 °, and the compactness of the structure can be ensured while the imaging effect is improved.

For example, the housing 10 is further provided with: at least one of a microphone 90, a bluetooth module, a WIFI module, and a data interface; wherein, at least one of microphone 90, bluetooth module, WIFI module and data interface is connected with controller 40.

For example, microphone 90 can realize gathering user's speech information, and realize voice interaction through controller 40, increase user's use experience, bluetooth module and WIFI module can realize with remote terminal and the network between data connection, data interface can be the USB interface, the USB interface includes a plurality ofly, but its effect is mainly for external memory, shift corresponding data, the storage, can also set up corresponding shift knob at casing 10, the opening or closing of the steerable holographic keyboard of shift knob, shift knob can be knob formula, touch-control formula or push type.

For example, referring to fig. 22, the holographic keyboard further includes a player 50, wherein an output terminal of the controller 40 is connected to an input terminal of the display assembly 30, and the controller 40 is further configured to control the player 50 to play audio matched with the region information according to the region information collected by the collector 60.

In at least one embodiment of the present disclosure, "audio matched with the region information" may be understood as: the keys comprise a plurality of keys, each key corresponds to different audios, and when a user touches the real image 70, the player 50 plays audio matched with collected region information, so that a sound scene that the user presses the keys is simulated, and the use experience of the user is further improved.

In another aspect, at least one embodiment of the present disclosure also provides a holographic fountain, as shown in fig. 23, including a housing 10 having a light outlet 20, and a display assembly 30 disposed within the housing 10.

For example, the display assembly 30 is configured to emit imaging light having imaging content that includes at least a fountain, the imaging light exiting through the light outlet 20 to an area remote from the housing 10 and forming imaging content that includes at least a fountain.

For example, placing a holographic fountain on the water or in water can improve the realism of a simulated real fountain, and the inventors of the present disclosure have found in their research that in some cases, as shown in fig. 24, by providing a battery 24 within the housing 10 to power the display assembly 30, it can be avoided: if the display module 30 is powered by an external power source, the external power source may cause an electric shock when damaged.

The inventor of the present disclosure also finds that, in some cases, by providing the heat conducting layer on the outer surface of the housing 10, the situation that the heat inside the housing 10 is too high to damage the components due to the long-time open use of the holographic fountain can be avoided.

In at least one embodiment of the present disclosure, the heat conduction layer is disposed on the outer surface of the casing 10, in a practical application scenario, heat generated by the display assembly 30 during operation can be dissipated to the outside of the casing 10 through the heat conduction layer, so as to dissipate heat in the casing 10, thereby avoiding the occurrence of a situation of component damage, and in some cases, the holographic fountain can be placed on water or used in water, so as to further improve the heat dissipation effect thereof.

For example, the heat conductive layer may be separately disposed on the surface of the casing 10, or may be integrally formed with the casing 10, and for example, the casing 10 may be a metal casing 10 having high heat dissipation.

For example, the housing 10 may be in any shape, such as a cube, a rectangular parallelepiped, a sphere, or a prism; referring to fig. 23, the housing 10 includes a rectangular parallelepiped shape, and the rectangular housing 10 is easy to process and reduces the manufacturing difficulty. The housing 10 may be made of a light-impermeable material, such as black plastic; the housing 10 made of opaque material can avoid the influence of external light on the imaging process of the imaging light, and can also avoid the situation that a user directly sees components inside the housing 10.

For example, referring to fig. 23, the display assembly 30 may include an image source 31, a transflective member 32 and an opposite reflection element 33, wherein the image source 31 is configured to emit imaging light rays of imaging contents including at least fireworks, the light outlet 20 includes a first sub light outlet 21 and a second sub light outlet 22 disposed at both sides of the housing 10, the first sub light outlet 21 and the second sub light outlet 22 may be symmetrically disposed, the image source 31 is configured to emit imaging light rays of imaging contents including at least a fountain, the transflective member 32 reflects a portion of the imaging light rays emitted from the image source 31 to the first sub light outlet 21 and transmits another portion of the imaging light rays to the opposite reflection element 33, so that a portion of the imaging light rays exits through the first sub light outlet 21 to an area far away from the housing 10 and forms a virtual image 80, another portion of the imaging light rays are reflected to the transflective member 32 through the opposite reflection element 33, the light-transmitting and reflecting member 32 transmits another part of the imaging light reflected by the opposite direction reflecting element 33 to the second sub light-exiting port 22, so that another part of the imaging light exits to an area far away from the housing 10 through the second sub light-exiting port 22 and forms a real image 70, wherein the imaging position of the real image 70 coincides with the imaging position of the virtual image 80.

For example, according to the imaging principle of the real image 70 and the virtual image 80, when the user a looks at a position close to the second sub light outlet 22, the user a looks as the real image 70, and when the user B looks at a position close to the first sub light outlet 21, that is, far from the second sub light outlet 22, the user B looks as the virtual image 80, and the virtual image 80 coincides with the imaging position of the real image 70.

In the embodiment of the present disclosure, on one hand, the real image 70 and the virtual image 80 including at least the imaging content of the fountain are formed, the imaging effect is good, the imaging is clear, and the use experience of the user can be increased; on the other hand, when the real image 70 with the imaging content including the fountain is formed, the virtual image 80 with the imaging content including the fountain can be formed at the same time, and the combination of the virtual image 80 and the real image 70 can enable a user to observe a clear fountain image under the conditions of surrounding at different positions and almost 360 degrees, so that the fountain simulation scene is realized, the effects of virtual-real combination and omnibearing display are achieved, and the imaging display effect is improved; on the other hand, the method has the advantages of low cost and simple process, and reduces the waste of resources; on the other hand, the holographic fountain has strong technological sense, and the use interest of a user can be improved.

In the embodiment of the present disclosure, the specific structures of the image source 31, the transflective member 32 and the opposite reflective element 33 may be similar to the image source 31, the transflective member 32 and the opposite reflective element 33 in the holographic keyboard in the foregoing embodiment, and therefore, the detailed structures of the image source 31, the transflective member 32 and the opposite reflective element 33 in the embodiment of the present disclosure are not repeated.

For example, the opposite reflection element 33 and the image source 31 are located on two sides of the transflective member 32, and the first sub light outlet 21 and the second sub light outlet 22 are located on two sides of the transflective member 32.

For example, the angle between the image source 31 and the transflective member 32 is 45 degrees.

In the example of fig. 23, the housing 10 has a square structure, the light outlet 20 is located at a side of the housing 10, the image source 31 is arranged parallel to the bottom surface of the housing 10, and an included angle between the image source 31 and the transflective member 32 is set to 45 degrees, so that the real image 70 and the virtual image 80 emitted through the light outlet 20 are perpendicular to the bottom surface of the housing 10, so that a user can observe the fountain, and the display effect is improved.

For example, the imaging light emitted from the image source 31 includes light having a first polarization characteristic and light having a second polarization characteristic, the polarization transflective element reflects the light having the first polarization characteristic emitted from the image source 31 to the first sub light outlet 21 and transmits the light having the second polarization characteristic to the phase retardation element 34, so that the light having the first polarization characteristic exits to an area away from the housing 10 through the first sub light outlet 21 and forms a virtual image 80, the phase retardation element 34 performs a first phase change on the light having the second polarization characteristic, the opposite reflecting element 33 reflects the light having the first phase change to the phase retardation element 34 along a direction opposite to the incident direction, the phase retardation element 34 performs a second phase change on the light having the first phase change, the light having the second phase change includes the light having the first polarization characteristic, the polarization transparent and reflective member 32 reflects the light with the first polarization characteristic to the second sub light outlet 22, so that the light with the first polarization characteristic exits to an area far away from the housing 10 through the second sub light outlet 22 and forms a real image 70.

For example, the phase delay element 34 can change the polarization characteristics of the imaging light, so that the imaging light with the changed polarization characteristics can be utilized, and the utilization rate and the imaging effect of the imaging light are improved.

In the embodiment of the present disclosure, the specific structures of the polarization transflective member 32 and the phase retardation element 34 may be similar to the polarization transflective member 32 and the phase retardation element 34 in the holographic keyboard in the foregoing embodiment, and therefore, the detailed structures of the polarization transflective member 32 and the phase retardation element 34 in the embodiment of the present disclosure are not repeated.

For example, the image source 31 emits light having a first polarization characteristic and light having a second polarization characteristic, for example, the first polarization characteristic may be a P-polarization characteristic, the second polarization characteristic may be an S-polarization characteristic, the image light emitted by the image source 31 includes P-polarized light and S-polarized light, the P-polarized light is reflected by the polarization transflective element to the first sub light outlet 21 to form a virtual image 80, the S-polarized light is transmitted by the polarization transflective element to the phase retarder 34, the phase retarder 34 converts the S-polarized light into circularly polarized light, the circularly polarized light is reflected by the opposite reflective element 33 and then converted into P-polarized light by the phase retarder 34, and the P-polarized light is reflected by the polarization transflective element to the second sub image outlet to form a real image 70.

For example, the phase retardation element 34 and the opposite reflection element 33 are disposed in a full-lamination manner, so that loss caused by a dielectric layer (e.g., an air layer) between the phase retardation element 34 and the opposite reflection element 33 can be reduced, as much light as possible can penetrate through the phase retardation element 34, the light utilization rate is improved, and the imaging brightness is increased.

For example, referring to fig. 23, the first sub light outlet 21 and the second sub light outlet 22 are respectively provided with a transparent plate 23 for sealing, the transparent plate 23 can be understood as a transparent plate capable of transmitting almost all imaging light, the transparent plate 23 can play a role in sealing the housing 10, when the holographic fountain provided by the embodiment of the disclosure is placed on water or in water for use, water can be placed inside the housing 10, so that components inside the housing 10 are damaged, and dust can be placed into the housing, thereby improving the protection performance of the holographic fountain.

For example, the outer surface of the case 10 is also provided with a waterproof layer.

The material of waterproof layer can adopt for example to have the layer structure of hydrophobicity, places the holographic fountain that this disclosed embodiment provided at the surface of water or aquatic when using, and inside the waterproof layer can avoid water to enter into casing 10 from the surface of casing 10 to make the components and parts in the casing 10 suffer damage, improved the protectiveness to the holographic fountain.

For example, the holographic fountain further comprises: a player 50, wherein the player 50 is configured to play audio matching the imaged content. The player 50 may be a unit or device having a function of playing audio, such as a speaker.

In at least one embodiment of the present disclosure, "audio matched to imaged content" may be understood as: when the imaging content is a fountain, then the audio that matches the fountain may include: the water flow is audible.

In the embodiment of the present disclosure, the specific structure and implementation principle of the player 50 may be similar to those of the player 50 in the holographic keyboard in the foregoing embodiment, and therefore, the specific structure and implementation principle of the player 50 in the embodiment of the present disclosure are not described in detail again.

For example, the imaging light includes at least one of red light, green light, or blue light.

In at least one embodiment of the present disclosure, the image sources 31 may be controlled to emit imaging light of different colors, so as to realize display of fountain images of different colors, thereby improving display effect and user experience.

For example, the display assembly 30 further includes a light blocking element 3735 configured to block imaging light emitted from the image source 31 at a predetermined angle.

Referring to fig. 25, a light-blocking element 3735 may be disposed in the light path of the image source 31, the light-blocking element 3735 may include a plurality of light-blocking barriers, wherein the light-blocking barriers are distributed in an array to physically block the imaging light from propagating in certain directions, by designing the height and width of the light blocking barrier, the angle at which the imaging light is visible to the user can be limited, for example, in the example of fig. 24, by the arrangement of light blocking element 3735, the imaging light can be limited to within viewing angle y, the viewing angle γ may be 60 °, 70 ° or 80 °, that is, when the human eye of the user is located within the viewing angle γ, the imaging light directly emitted by the image source 31 can be observed, when the human eyes of the user are positioned outside the visual angle gamma, the imaging light rays directly emitted by the image source 31 cannot be observed, so that the use effect of the holographic fountain is improved.

For example, referring to fig. 26, a holographic fountain may further include: a controller 40 and a microphone 90, wherein an input terminal of the controller 40 is connected to an output terminal of the microphone 90, and an output terminal of the controller 40 is connected to an input terminal of the display module 30. The microphone 90 is configured to capture audio information and the controller 40 is configured to control the display assembly 30 to emit imaging light that matches the audio information based on the audio information.

For example, in the usage process of the holographic fountain, the microphone 90 may collect audio information in real time, the audio information may include a decibel value of any sound in the outside world, and the controller 40 may control the imaging content formed by the imaging light emitted by the display component 30 according to the decibel value, for example, when the decibel value of the collected audio information is higher, the imaging light that forms the imaging content of the fountain with higher height is emitted, and when the decibel value of the collected audio information is lower, the imaging light that forms the imaging content of the fountain with lower height is emitted, thereby enhancing the interest.

In the embodiment of the present disclosure, the specific structure and implementation principle of the controller 40 may be similar to the controller 40 in the holographic keyboard in the foregoing embodiment, and therefore, the detailed structure and implementation principle of the controller 40 in the embodiment of the present disclosure are not repeated.

In still another aspect, at least one embodiment of the present disclosure further provides a holographic firework, as shown in fig. 27, which includes a housing 10 having a light outlet 20, and a display assembly 30 disposed in the housing 10.

For example, the display assembly 30 is configured to emit imaging light of imaging content including at least fireworks, the imaging light exits through the light outlet 20 to an area away from the housing 10 and forms a real image 70, the real image 70 formed at the area away from the housing 10 includes at least imaging content of a fountain, the real image 70 floats in air, can be observed and touched by a user, and has a good light sensing experience.

For example, the housing 10 may be any desired shape, such as a cube, a cuboid, a sphere, or a prism; referring to fig. 27, the housing 10 includes a rectangular parallelepiped shape, and the rectangular housing 10 is easy to process and reduces the manufacturing difficulty. The housing 10 may be made of a light-impermeable material, such as black resin plastic; the housing 10 made of opaque material can avoid the influence of external light on the imaging process of the imaging light, and can also avoid the situation that a user directly sees components inside the housing 10.

For example, referring to fig. 28, the display assembly 30 may include an image source 31, a transflective member 32, and an opposite reflective element 33, wherein the image source 31 is configured to emit imaging light rays of which imaging contents at least include fireworks, the transflective member 32 reflects the imaging light rays emitted from the image source 31 to the opposite reflective element 33, the opposite reflective element 33 reflects the imaging light rays reflected by the transflective member 32 to the transflective member 32 in a direction opposite to an incident direction, and the transflective member 32 transmits the imaging light rays reflected by the opposite reflective element 33, so that the imaging light rays are emitted to a region far away from the housing 10 through the light outlet 20 and form a real image 70.

For example, the transflective member 32 is disposed at the light outlet 20, and may completely or partially cover the light outlet 20; the light-transmitting and reflecting piece 32 completely covers the light outlet 20, so that the light outlet 20 can be sealed, external dust is prevented from entering the shell 10 through the light outlet 20, and the protection performance of the holographic firework is improved.

The inventors of the present disclosure found in research that, according to the imaging principle of the real image 70, the image source 31 and the real image 70 are symmetrical with respect to the transflective member 32, and therefore, the imaging position of the real image 70 can be changed by changing the imaging position between the image source 31 and the transflective member 32.

For example, referring to fig. 28, in the vertical direction, the distance between the image source 31 and the transflective member 32 may be set to be greater than the distance threshold λ, so as to increase the imaging distance of the imaging light emitted by the image source 31, and further increase the relative distance between the real image 70 and the casing 10, thereby enabling the real image 70 to be displayed remotely, and improving the authenticity of the simulated fireworks.

For example, the vertical direction may be understood as a direction perpendicular to the light outlet 20 of the housing 10, the horizontal direction may be understood as a direction parallel to the light outlet 20 of the housing 10, and the distance threshold λ may be understood as a distance value that is set by a user according to a user's needs, and the distance value is not particularly limited in at least one embodiment of the present disclosure.

In the embodiment of the disclosure, on one hand, the real image 70 at least including the imaging content of the firework is formed to be touched by a user, the imaging effect is good, the imaging is clear, and the use experience of the user can be increased, and on the other hand, in the vertical direction, the distance between the image source 31 and the transflective member 32 is set to be greater than the distance threshold lambda, so that the real image 70 is displayed remotely, the reality of the simulated firework is improved, and the method has the advantages of low cost and simple process; on the other hand, holographic fireworks still have stronger science and technology and feel, can promote user's interest in use.

For example, the holographic fireworks further include: a player 50, wherein the player 50 is configured to play audio matching the imaging content. The player 50 may be a unit or device having a function of playing audio, such as a speaker.

In at least one embodiment of the present disclosure, "audio matched to imaged content" may be understood as: when the imaging content is a firework, then the audio that matches the fountain may include: the sound of explosion.

In at least one embodiment of the present disclosure, the image source 31 may be controlled to emit imaging light rays of different colors, so as to realize display of firework images of different colors, and improve display effect and user experience.

In at least one embodiment of the present disclosure, the display assembly 30 further includes a phase retardation element 34, and the transflective member 32 includes a polarization transflective element, wherein specific structures and functions of the phase retardation element 34 and the polarization transflective element may be similar to those of the phase retardation element 34 and the polarization transflective element in the holographic keyboard, and therefore, detailed descriptions thereof are omitted in this embodiment of the present disclosure.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims

1. A holographic keyboard, comprising:

a housing having a light outlet;

a display assembly disposed within the housing; and

a controller, a collector and a player;

the display component is configured to emit imaging light rays of imaging contents at least including keys, so that the imaging light rays are emitted to an area far away from the shell through the light outlet and form a real image;

the input end of the controller is connected with the output end of the collector, and the output end of the controller is connected with the input end of the display component and the input end of the player;

the collector is configured to collect area information of the touched real image, the controller is configured to control the display assembly to emit imaging contents including at least imaging light of changed keys matched with the area information based on the area information, and the controller is further configured to control the player to play audio matched with the area information.

2. The holographic keyboard of claim 1, wherein the display assembly comprises an image source, a transflective member, and an opposing reflective element;

the image source is configured to emit imaging light rays of which imaging contents at least comprise keys, the transflective piece reflects the imaging light rays emitted by the image source to the opposite reflection element, the opposite reflection element reflects the imaging light rays reflected by the transflective piece to the transflective piece along a direction opposite to an incident direction, and the transflective piece transmits the imaging light rays reflected by the opposite reflection element, so that the imaging light rays are emitted to an area far away from the shell through the light outlet and form a real image.

3. The holographic keyboard of claim 2, wherein the transflective member is disposed at the light exit port.

4. The holographic keyboard of claim 2, wherein the display assembly further comprises a phase retarding element;

wherein the transflective member comprises a polarizing transflective element configured to reflect light having a first polarization characteristic incident thereto and transmit light having a second polarization characteristic, wherein the first polarization characteristic is different from the second polarization characteristic;

the imaging light emitted by the image source comprises light with a first polarization characteristic, the polarization transflective element reflects the light with the first polarization characteristic emitted by the image source to the phase delay element, the phase delay element performs a first phase change on the light having the first polarization characteristic, the opposite direction reflecting element reflects the light after the first time of phase change to the phase delay element along the direction opposite to the incident direction, the phase delay element performs a second phase change on the light after the first phase change, the light after the second phase change comprises light with a second polarization characteristic, the polarization transflective element transmits the light with the second polarization characteristic to the light outlet, so that the light with the second polarization characteristic is emitted to an area far away from the shell through the light outlet and forms a real image.

5. The holographic keyboard of claim 4, wherein the display assembly further comprises a polarization absorbing element;

the polarization absorption element is arranged on one side of the polarization transflective element far away from the image source, and is configured to absorb the light with the first polarization characteristic and transmit the light with the second polarization characteristic.

6. The holographic keyboard of claim 2, wherein the image source comprises:

at least one light source module;

a light diffusing element; and

an image-generating layer;

wherein the light source module is configured to emit source light, the light diffusing element is configured to diffuse the source light, and the image generation layer is configured to convert the source light into imaging light whose imaging content includes at least keys.

7. The holographic keyboard of claim 6, wherein the light diffusing elements comprise a plurality of light diffusing elements arranged in sequence on an exit light path of the source light, adjacent light diffusing elements being spaced apart by a predetermined distance.

8. A holographic fountain, comprising:

a housing having a light outlet;

the display assembly and the battery are arranged in the shell;

the display assembly is configured to emit imaging light with imaging content at least including a fountain, so that the imaging light is emitted to an area far away from the shell through the light outlet and forms a real image, and the battery is configured to supply power to the display assembly;

wherein, the surface of casing is provided with the heat-conducting layer.

9. The holographic fountain of claim 8, wherein the display assembly includes an image source, a transflector, and an opposing reflective element, the light outlets including a first sub-outlet and a second sub-outlet disposed on either side of the housing;

the image source is configured to emit imaging light rays with imaging contents at least comprising a fountain, the transflective member reflects a part of the imaging light rays emitted by the image source to a first sub light outlet and transmits the other part of the imaging light rays to the opposite direction reflecting element so that the part of the imaging light rays are emitted to an area far away from the shell through the first sub light outlet and form a virtual image, the other part of the imaging light rays are reflected to the transflective member through the opposite direction reflecting element, and the transflective member transmits the other part of the imaging light rays reflected by the opposite direction reflecting element to a second sub light outlet so that the other part of the imaging light rays are emitted to the area far away from the shell through the second sub light outlet and form a real image;

wherein the imaging positions of the real image and the virtual image coincide.

10. The holographic fountain of claim 9, wherein the display assembly further comprises a phase delay element;

the imaging light emitted by the image source comprises light with a first polarization characteristic and light with a second polarization characteristic, the polarization transflective element reflects the light with the first polarization characteristic emitted by the image source to a first sub light outlet and transmits the light with the second polarization characteristic to the phase delay element, so that the light with the first polarization characteristic is emitted to an area far away from the shell through the first sub light outlet to form a virtual image, the phase delay element performs a first phase change on the light with the second polarization characteristic, the opposite direction reflecting element reflects the light after the first phase change to the phase delay element along a direction opposite to an incident direction, the phase delay element performs a second phase change on the light after the first phase change, and the light after the second phase change comprises the light with the first polarization characteristic, the polarization transflective member reflects the light with the first polarization characteristic to the second sub light outlet, so that the light with the first polarization characteristic is emitted to an area far away from the shell through the second sub light outlet and forms a real image.

11. The holographic fountain of claim 9, wherein the opposing reflective elements and the image source are located on opposite sides of the transflective member, and the first and second sub light outlets are located on opposite sides of the transflective member.

12. The holographic fountain of claim 9, wherein an angle between the image source and the transflective member is 45 degrees.

13. The holographic fountain according to claim 9, wherein the first sub light outlet and the second sub light outlet are respectively provided with a light-transmitting plate for sealing.

14. The holographic fountain of claim 8, wherein an outer surface of the housing is further provided with a water barrier.

15. The holographic fountain of claim 8, further comprising:

a player;

wherein the player is configured to play audio that matches the imaging content.

16. The holographic fountain of claim 8, in which the imaging light includes at least one of red, green, or blue light.

17. The holographic fountain of claim 9, further comprising:

a light blocking element configured to block imaging light emitted by the image source at a preset angle.

18. The holographic fountain of claim 8, further comprising:

a controller and a microphone;

the input end of the controller is connected with the output end of the microphone, the output end of the controller is connected with the input end of the display component, the microphone is configured to collect audio information, and the controller is configured to control the display component to emit imaging light matched with the audio information based on the audio information.

19. A holographic firework, comprising:

a housing having a light outlet; and

a display assembly disposed within the housing;

the display component comprises an image source, a transflective piece and an opposite reflection element;

the image source is configured to emit imaging light rays of which imaging contents at least comprise fireworks, the transflective piece reflects the imaging light rays emitted by the image source to the opposite reflection element, the opposite reflection element reflects the imaging light rays reflected by the transflective piece to the transflective piece along a direction opposite to an incident direction, and the transflective piece transmits the imaging light rays reflected by the opposite reflection element, so that the imaging light rays are emitted to an area far away from the shell through the light outlet and form a real image;

wherein, in the vertical direction, the distance between the image source and the transflective member is greater than a distance threshold.

20. The holographic firework of claim 19, wherein the transflective member is disposed at the light exit.

21. The holographic firework of claim 19, further comprising:

a player;

22. The holographic firework of claim 19, wherein the imaging light includes at least one of red, green, or blue light.