CN213403360U

CN213403360U - Sound box

Info

Publication number: CN213403360U
Application number: CN202022181687.7U
Authority: CN
Inventors: 徐俊峰; 方涛; 姚博瀚; 陈川
Original assignee: Future Beijing Black Technology Co ltd
Current assignee: Future Beijing Black Technology Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-06-08
Anticipated expiration: 2030-09-29

Abstract

The utility model discloses a sound box, include: a housing; a sound source housed within the housing; a light outlet and a speaker port provided in the housing; and a display component; the display assembly comprises an image source, a reflecting mirror and an opposite direction reflecting element, imaging light emitted by the image source is reflected to the opposite direction reflecting element through the reflecting mirror, the opposite direction reflecting element reflects the imaging light reflected by the reflecting mirror to the reflecting mirror along the direction opposite to the incident direction, and the reflecting mirror transmits the imaging light reflected by the opposite direction reflecting element to the light outlet, 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 audio frequency emitted by the sound source is transmitted through the sound-raising port. The utility model provides a loudspeaker box can satisfy user's sense of hearing enjoyment and vision enjoyment simultaneously, has improved user's experience effect.

Description

Sound box

Technical Field

The utility model belongs to the technical field of the optical display, concretely relates to audio amplifier.

Background

With the improvement of life quality and the rapid development of science and technology, smart home products gradually enter the daily life of people.

At present, the function of music playing can be realized by intelligent voice, and voice interaction with a user can be realized through a voice recognition technology, but the existing intelligent sound box only can realize the voice interaction function with the user, and lacks visual interaction, so that the user is difficult to fully enjoy the advantages of an intelligent home product.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that proposes among the background art, the utility model provides a sound box, include:

a housing;

a sound source housed within the housing;

a light outlet and a speaker port provided in the housing; and

a display component;

wherein,

the display assembly comprises an image source, a reflecting mirror and an opposite direction reflecting element, imaging light emitted by the image source is reflected to the opposite direction reflecting element through the reflecting mirror, the opposite direction reflecting element reflects the imaging light reflected by the reflecting mirror to the reflecting mirror along the direction opposite to the incident direction, and the reflecting mirror transmits the imaging light reflected by the opposite direction reflecting element to the light outlet, 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 audio frequency emitted by the sound source is transmitted through the sound-raising port.

In one possible implementation, the counter-reflective element has an arc curved towards the transflective mirror.

In one possible implementation, the opposite direction reflecting element comprises a substrate and a plurality of microstructures distributed on the substrate.

In one possible implementation manner, the microstructures include at least one of a solid transparent material right-angle vertex microstructure, a solid transparent material spherical microstructure, or a hollow concave right-angle vertex microstructure distributed on the surface of the substrate.

In one possible implementation, the display component further includes:

a phase delay element; and

the polarization transflective element is arranged on one side of the transflective mirror close to the image source;

the polarization transflective element allows light of a first polarization characteristic to reflect and allows light of a second polarization characteristic to transmit;

wherein,

the imaging light emitted by the image source comprises light with a first polarization characteristic, the light with the first polarization characteristic in the imaging light is reflected by the polarization transflective element, the reflected light is subjected to first phase change by the phase delay element, the light after the first phase change is reflected by the opposite direction reflecting element, the reflected light is subjected to second phase change by the phase delay element, the light after the second phase change is changed into light with a second polarization characteristic to be transmitted by the polarization transflective element, and the transmitted light is emitted to an area far away from the shell through the light outlet to form a real image.

In a possible implementation manner, a polarization transparent and absorptive element is arranged on the transflective lens;

the polarization absorbing element absorbs light of a first polarization characteristic and allows light of a second polarization characteristic to transmit.

In one possible implementation, the display component further includes:

a light blocking element;

the light blocking element is arranged on a light emitting path of the image source and used for blocking imaging light emitted by the image source at a preset angle.

In one possible implementation, the image source includes:

at least one light source module;

a light diffusing element; and

an image-generating layer;

the light source module is used for emitting source light, the light diffusion element is used for diffusing the source light, and the image generation layer is used for converting the diffused source light into imaging light.

In a possible implementation manner, the light diffusion elements include a plurality of light diffusion elements, the light diffusion elements are sequentially arranged on the light emitting path of the light source module, and a preset distance is arranged between every two adjacent light diffusion elements.

In one possible implementation, the light source module includes:

a light source;

a polarization beam splitting element;

a reflective element; and

a polarization conversion element;

the source light emitted by the light source comprises light rays with a first polarization characteristic and light rays with a second polarization characteristic, the polarization beam splitting element is used for splitting the light rays incident to the polarization beam splitting element into the light rays with the first polarization characteristic and the light rays with the second polarization characteristic, the light rays with the first polarization characteristic are emitted to the light diffusion element, the light rays with the second polarization characteristic are emitted to the reflection element, the reflection element is used for changing the propagation direction of the light rays incident to the reflection element to enable the light rays to be emitted to the light diffusion element, and the polarization conversion element is used for converting the light rays with the polarization characteristics which cannot be utilized by the image generation layer into the light rays with the polarization characteristics which can be utilized by the image generation layer before the light rays with the first polarization characteristic and the light rays with the second polarization characteristic reach the image generation layer.

In a possible implementation manner, the light source module further includes:

a light guide element;

the light guide element is used for transmitting source light emitted by the light source to the polarization beam splitting element.

In a possible implementation manner, the light guide element includes a hollow housing surrounded by a light reflecting surface, an opening of the hollow housing faces the polarization beam splitting element, an end portion of the hollow housing away from the opening is used for disposing the light source, and source light emitted from the light source is reflected when entering the light reflecting surface, so that the source light reflected by the light reflecting surface is emitted to the polarization beam splitting element.

In one possible implementation, the transflective lens is disposed at the light exit.

In one possible implementation, the speaker opening is provided with a dustproof cloth.

In a possible implementation manner, the housing is further provided with:

at least one of a microphone, a Bluetooth module, a WIFI module and a data interface; and

and the controller is electrically connected with at least one of the microphone, the Bluetooth module, the WIFI module and the data interface.

The embodiment of the utility model provides an among the above-mentioned scheme, on the one hand, the sound source can send the audio frequency to propagate through the mouth of raising the voice, the content of audio frequency can be set for according to user's demand, specifically can be: the performance program of song, drama, talk show or other language class satisfies user's sense of hearing and enjoys, and on the other hand, the display module can go out formation of image light to through the light-emitting window at the regional real image that keeps away from the casing, the content of real image can be set for according to user's demand, specifically can be: information associated with a currently playing song, drama, talk show, or other language-like show, such as: lyrics, program introduction and the like, so that the visual enjoyment of a user is met, the experience effect of the user is improved, and different requirements of various application scenes such as games, education, military training and the like are met.

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 shows a schematic structural diagram of a sound box according to an embodiment of the present invention;

fig. 2 is a schematic structural view showing a display module in the present embodiment;

fig. 3 shows an optical path diagram of imaging light rays propagating through an opposing reflective element in the present embodiment;

fig. 4 shows a schematic structural view of the opposed reflection element in the present embodiment;

FIG. 5 is a side view of an opposing reflective element comprising a spherical microstructure of solid transparent material in the present embodiment;

FIG. 6 is a side view of an opposite direction reflecting element of the present embodiment comprising a solid transparent right-angled triangular pyramid apex microstructure;

FIG. 7 is a side view of an exemplary embodiment of an opposing reflective element comprising a solid transparent isosceles triangular pyramidal right angle apex microstructure;

FIG. 8 illustrates a side view of an opposing reflective element comprising a solid transparent cube-corner apex microstructure in the present embodiment;

FIG. 9 shows a side view of an opposing reflective element of this embodiment comprising a hollow-depressed right-angled triangular pyramidal apex microstructure;

FIG. 10 shows a side view of an opposing reflective element of this embodiment comprising a hollow-recessed isosceles triangular pyramidal right-angle apex microstructure;

FIG. 11 shows a side view of an opposing reflective element comprising a hollow-depressed cube-corner apex microstructure in accordance with the present embodiments;

fig. 12 is a schematic structural view showing a phase retardation element and a polarization transflective element in the present embodiment;

fig. 13 is an optical path diagram showing the propagation of the imaging light rays through the polarization transflective element and the phase delaying element in the present embodiment;

fig. 14 is a schematic structural view showing a light-blocking member in the present embodiment;

fig. 15 shows a schematic configuration diagram of an image source in the present embodiment;

FIG. 16 is a schematic structural diagram illustrating the light source module and the image generation layer in the embodiment of the invention are disposed obliquely;

FIGS. 17 to 19 are schematic views showing the structure between the light diffusing element and the image generating layer in the present embodiment;

fig. 20 is a schematic view showing the structure of an image generation layer in the present embodiment;

fig. 21 to 23 are schematic structural diagrams illustrating the light source module in the embodiment;

fig. 24 to 26 are schematic structural views showing a solid transparent member in the present embodiment;

FIGS. 27-28 show schematic structural views of a hollow lamp cup in this embodiment;

fig. 29 shows a schematic structural diagram of the polarization absorbing element in the present embodiment.

In the figure: 10. a housing; 11. a light outlet; 12. a sound raising port; 20. a sound source; 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, an opening; 31153. a collimating element; 312. a light diffusing element; 313. an image-generating layer; 3131. a liquid crystal layer; 3132. a first polarizer; 3133. a second polarizer; 32. a transflective mirror; 33. an opposite reflection element; 331. a substrate; 332. a highly reflective coating; 333. a solid transparent spherical microstructure; 334. a solid transparent right-angled vertex microstructure of a regular triangular cone; 335. an isosceles triangular pyramid right-angle vertex microstructure made of solid transparent materials; 336. a cubic cone right-angle vertex microstructure made of solid transparent materials; 337. a hollow concave right-angled vertex microstructure of a regular triangular pyramid; 338. a hollow recessed isosceles triangular pyramid right angle vertex microstructure; 339. a hollow sunken cubic cone right-angle vertex microstructure; 34. a phase delay element; 35. a polarizing transflector; 36. a light blocking element; 37. a polarization absorbing element; 40. a dust-proof film; 50. a real image.

Detailed Description

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

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit 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 concept 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 form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

It should be noted that, for simplicity and clarity of description, the following description sets forth various embodiments of the present invention. Numerous details of the embodiments are set forth to provide an understanding of the principles of the invention. It is clear, however, that the solution according to the invention can be implemented without being limited to these details. Some embodiments are not described in detail, but rather only to give a framework, in order to avoid unnecessarily obscuring aspects of the present invention. Hereinafter, "including" 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 embodiment of the utility model provides a sound box, as shown in fig. 1, sound box is including casing 10, the sound source 20 of holding in casing 10 (not shown in the figure, set up light-emitting port 11, loudspeaker port 12 and display module 30 (not shown in the figure) on casing 10, and is concrete, in order to improve the overall structure intensity of sound box, the higher material of intensity can be chooseed for use to casing 10's material, for example, at least one in the materials such as aluminum alloy, resin or plastics.

Specifically, as shown in fig. 2, the display assembly 30 includes an image source 31, a transflective mirror 32 and an opposite reflection element 33, wherein the image source 31 is used for emitting an imaging light, the imaging light emitted from the image source 31 is reflected to the opposite reflection element 33 through the transflective mirror 32, the opposite reflection element 33 reflects the imaging light reflected by the transflective mirror 32 to the transflective mirror 32 along a direction opposite to the incident direction, and the transflective mirror 32 transmits the imaging light reflected by the opposite reflection element 33 to the light outlet 11, so that the imaging light outlet 11 emits to a region far away from the housing 10 and forms a real image 50.

In a specific implementation, the image source 31 includes a display device capable of Emitting imaging Light, which may be a liquid crystal display, or an active Light-Emitting dot-matrix screen composed of Light-Emitting point Light sources 3111 such as LEDs (Light-Emitting Diode), OLEDs (Organic Light-Emitting Diode), and plasma Light-Emitting points; 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.

The reflecting mirror 32 may be made of transparent material, such as glass, quartz, resin or high molecular 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 mirror 32, a part of the imaging light may be reflected by the transflective mirror 32, and another part of the imaging light may be transmitted by the transflective mirror 32, optionally, the reflectivity of the transflective mirror 32 is between 20% and 90%, and the transmittance thereof is also between 20% and 90%, for example: when the reflectivity of the mirror 32 is 30%/50%/70%, the corresponding transmission is 70%/50%/30%, preferably, a mirror 32 with a transmission and a reflectivity of 50% can be selected.

The opposite direction reflecting element 33 can reflect the imaging light reflected by the transparent mirror 32 to the transparent mirror 32 along a direction opposite to the incident direction, fig. 3 shows a light path diagram of the imaging light reflected by the opposite direction reflecting element 33, and it should be noted that after the imaging light is reflected on the opposite direction reflecting element 33, the reflected light on the opposite direction reflecting element 33 and the incident light are on the same path, but the directions are opposite, so the light is reflected by the opposite direction reflecting element 33 and exits along the original incident path (of course, when viewed microscopically, the reflected path and the incident path can be considered to be slightly shifted, but when viewed macroscopically, the two paths can be considered to be completely overlapped).

In the embodiment of the present invention, the display module 30 is disposed in the casing 10, the image source 31 and the opposite direction reflective element 33 are both located at the same side of the transparent mirror 32, the imaging light emitted from the image source 31 can be firstly reflected to the opposite direction reflective element 33 via the transparent mirror 32, the opposite direction reflective element 33 further reflects to the transparent mirror 32 along the direction opposite to the incident direction of the imaging light, so that the transparent mirror 32 transmits the imaging light to the light outlet 11, the real image 50 is formed in the region far away from the casing 10 through the light outlet 11, and floats in the air, and the tangible real image 50 is provided.

In conclusion, in the embodiment of the present invention, on the one hand, the sound source 20 can send out audio, and propagate through the sound emitting port 12, the content of the audio can be set according to the requirement of the user, and specifically can be: the songs, dramas, talk shows or other language type shows can satisfy the hearing enjoyment of the user, on the other hand, the display assembly 30 can emit imaging light and form the real image 50 in the area far away from the housing 10 through the light outlet 11, and the content of the real image 50 can be set according to the user's requirement, which specifically can be: information associated with a currently playing song, drama, talk show, or other language-like show, such as: lyrics, program introduction and the like, so that the visual enjoyment of a user is met, the experience effect of the user is improved, and different requirements of various application scenes such as games, education, military training and the like are met.

On the basis of the above, the real image 50 formed by the imaging light in the area far away from the housing 10 is symmetrical with respect to the transflective mirror 32, so that the imaging position of the imaging light can be changed by setting the specific position of the image source 31 in the housing 10, for example, in the example of fig. 1, the housing 10 is of a square structure, the light outlet 11 is located on the top surface of the housing 10, here, the real image 50 formed by the display assembly 30 can also be correspondingly located in the area far away from the housing 10 perpendicular to the top surface of the housing 10 by setting the image source 31 to be perpendicular to the horizontal plane, i.e. perpendicular to the top surface of the housing 10, so as to be conveniently viewed by the user and improve the corresponding visual enjoyment, and, in a preferred implementation, the included angle between the transflective mirror 32 and the opposite reflection element 33 can be 25 ° -35 °, specifically 30 °, since the user uses the sound box in the embodiment of the present invention, generally, in a sitting posture, when the two eyes of the user, the real image 50 (e.g., the center of the real image 50) and the opposite direction reflecting element 33 (e.g., the center of the opposite direction reflecting element 33) are located at or close to the same straight line, the observation effect of the real image 50 is better, and when the included angle between the transflective mirror 32 and the opposite direction reflecting element 33 is close to or 30 °, the two eyes and the above elements are located at or close to the same straight line, and the observation effect of the real image 50 is better, so that the user can watch the image conveniently, and the corresponding visual enjoyment is improved.

In some optional implementations, the opposite direction reflecting element 33 further has an arc curved toward the transflective mirror 32, as shown in fig. 4, when imaging light rays with different incident angles are transmitted to the opposite direction reflecting element 33 through the transflective mirror 32, due to the different incident angles of different areas, areas with larger incident angles, such as light rays at the edge of the opposite direction reflecting element 33, have poorer opposite direction reflection efficiency, specifically, the opposite direction reflection efficiency refers to the ratio of the outgoing opposite direction reflected light rays to the incident light ray intensity, such as the ratio of the opposite direction reflected light ray luminous flux to the incident light ray luminous flux; the curved counter-reflecting element 33 is beneficial to reduce the incident angle of the incident light on the counter-reflecting element 33, and the smaller the angle of the incident angle, the better the counter-reflecting effect, and the higher the brightness of the final real image 50.

The counter-reflecting element 33 in the embodiment of the present invention is a specially processed element, which includes, for example, the substrate 331 coated with the high-reflecting coating 332, and, for example, the microstructures uniformly distributed on the substrate 331, the reflectivity of the high-reflecting coating 332 is more than 60%, preferably more than 70%, 80% or 90%, it should be understood that the high-reflecting coating 332 may be attached to the substrate 331 in other manners, such as a coating film.

Of course, the highly reflective coating 332 can be attached, for example, to the side of the microstructures facing the substrate 331, or to the area where the microstructures interface with the substrate 331.

It should be understood that the distribution of the counter-reflecting microstructures on the substrate 331 can also be non-uniform, with a uniform distribution providing better imaging results, although some intentionally placed non-uniform distributions can be used for specific imaging purposes.

Specifically, the microstructures may include at least one of a solid transparent right-angled vertex microstructure, a solid transparent spherical microstructure 333, or a hollow recessed right-angled vertex microstructure distributed on the surface of the substrate 331.

The above-mentioned right-angled vertex microstructure of solid transparent material, spherical microstructure 333 of solid transparent material, or hollow-recessed right-angled vertex microstructure will be further described in detail below:

first, for the solid transparent material right angle vertex microstructure and the solid transparent material spherical microstructure 333, the opposite direction reflection component 33 includes the substrate 331 and the solid transparent material microstructure distributed on the surface of the substrate 331, the high reflection coating 332 is disposed on the surface of the solid transparent material microstructure contacting with the substrate 331,

referring to fig. 5, which shows a side view of the opposite direction reflection element 33 including the solid transparent spherical microstructure 333 in the embodiment of the present invention, the opposite direction reflection element 33 includes a substrate 331, the surface of the substrate 331 is distributed with a plurality of solid transparent spherical microstructures 333, and a high reflection coating 332 is disposed on the surface of the solid transparent spherical microstructures 333 that contacts the substrate 331. When the imaging light enters the opposite direction reflection element 33, the imaging light is refracted to enter the solid transparent spherical microstructure 333, and is reflected on the high reflection coating 332 at the boundary between the solid transparent spherical microstructure 333 and the base 331, and the reflected imaging light is refracted out of the solid transparent spherical microstructure 333 and is emitted in the direction opposite to the incident direction. Or, the solid transparent spherical microstructure 333 further includes an ellipsoid-shaped microstructure, and since the process of implementing the opposite reflection of the light beam at the ellipsoid-shaped microstructure is similar to the above process, the description is omitted, and the opposite reflection efficiency of the ellipsoid-shaped microstructure is slightly lower than that of the spherical microstructure.

Referring to fig. 6, wherein the utility model provides an in the embodiment of the utility model discloses a side view of subtend reflection component 33 including solid transparent material's regular triangle awl right angle summit microstructure 334, subtend reflection component 33 includes substrate 331, substrate 331 is light-transmitting structure, substrate 331's surface distribution a plurality of solid transparent material's regular triangle awl right angle summit microstructure 334, solid transparent material's regular triangle awl right angle summit microstructure 334 deviates from the surface of substrate 331 and is provided with high reflective coating 332, specifically solid transparent material's regular triangle awl right angle summit microstructure 334's three mutually perpendicular's right angle triangle face department is provided with high reflective coating 332. When the imaging light enters the opposite direction reflection element 33, the imaging light firstly refracts to enter the substrate 331, propagates to the inside of the solid transparent right-angled triangular pyramid vertex microstructure 334 through the substrate 331, and is reflected three times at three mutually perpendicular right-angled triangular faces of the solid transparent right-angled pyramid right-angled vertex microstructure 334, and the reflected imaging light refracts out of the opposite direction reflection element 33 and exits in the direction opposite to the incident direction. It should be noted that although the front-side opposite reflection efficiency of the opposite reflection element 33 including the solid transparent regular-triangular-pyramid right-angle vertex microstructure 334 is very high, the opposite reflection efficiency is greatly attenuated when the incident angle of the imaging light is large.

Referring to fig. 7, wherein the utility model provides an embodiment of the utility model provides an including solid transparent material's isosceles triangular pyramid right angle summit microstructure 335's subtend reflection element 33's side view, subtend reflection element 33 includes substrate 331, substrate 331 is light-transmitting structure, substrate 331's the surface distributes a plurality of solid transparent material's isosceles triangular pyramid right angle summit microstructure 335, solid transparent material's isosceles triangular pyramid right angle summit microstructure 335 deviates from substrate 331's surface and is provided with high reflective coating 332, specifically solid transparent material's isosceles triangular pyramid right angle summit microstructure 335's three mutually perpendicular's triangular face department is provided with high reflective coating 332. When the imaging light enters the opposite direction reflection element 33, the imaging light firstly refracts to enter the substrate 331, propagates to the inside of the solid transparent isosceles triangular pyramid right-angle vertex microstructure 335 through the substrate 331, and is reflected three times at three mutually perpendicular triangular faces of the solid transparent isosceles triangular pyramid right-angle vertex microstructure 335, and the reflected imaging light refracts out of the opposite direction reflection element 33 and exits in the direction opposite to the incident direction. It should be noted that although the front-side opposite reflection efficiency of the opposite reflection element 33 including the solid isosceles triangular pyramid right-angle apex microstructure 335 is slightly lower than the reflection efficiency of the opposite reflection element 33 including the solid isosceles triangular pyramid right-angle apex microstructure 334, the opposite reflection efficiency is not greatly attenuated when the incident light angle is large.

Referring to fig. 8, a side view of an opposing reflective element 33 comprising a solid transparent cube-corner right-angle vertex microstructure 336 is shown in an embodiment of the invention. The opposite direction reflection element 33 includes a substrate 331, the substrate 331 is a light transmission structure, the surface of the substrate 331 is distributed with a plurality of solid transparent cubic cone right angle vertex microstructures 336, the surface of the solid transparent cubic cone right angle vertex microstructures 336 departing from the substrate 331 is provided with a high reflection coating 332, and specifically, three mutually perpendicular cubic surfaces of the solid transparent cubic cone right angle vertex microstructures 336 are provided with high reflection coatings 332. When the imaging light enters the opposite direction reflection element 33, the imaging light firstly refracts to enter the substrate 331, propagates to the inside of the solid transparent cubic cone right-angle vertex microstructure 336 through the substrate 331, and is reflected three times at three mutually perpendicular cubic surfaces of the solid transparent cubic cone right-angle vertex microstructure 336, and the reflected imaging light refracts out of the opposite direction reflection element 33 and exits along the direction opposite to the incident direction.

Next, for the hollow-recessed right-angle apex microstructure, the opposite direction reflection element 33 includes a substrate 331 and a hollow-recessed right-angle apex microstructure disposed on the substrate 331, and the high reflection coating 332 is disposed on a recessed surface of the hollow-recessed right-angle apex microstructure facing away from the substrate 331.

Referring to fig. 9, which shows a side view of the opposite direction reflecting element 33 including the hollow concave right-angled triangular pyramid vertex microstructure 337 in the embodiment of the present invention, the opposite direction reflecting element 33 includes a substrate 331, the surface of the substrate 331 is distributed with a plurality of hollow concave right-angled triangular pyramid vertex microstructures 337, the concave surface of the right-angled triangular pyramid right-angled vertex microstructure departing from the substrate 331 is provided with a high reflective coating 332, and specifically, the three mutually perpendicular right-angled triangular surfaces of the hollow concave right-angled triangular pyramid right-angled vertex microstructure 337 are provided with high reflective coatings 332. When the imaging light enters the opposite direction reflection element 33, the imaging light is transmitted to the inside of the hollow concave right-angled triangular pyramid vertex microstructure 337, three times of reflection occurs at three mutually perpendicular right-angled triangular faces of the hollow concave right-angled triangular pyramid vertex microstructure 337, and the reflected imaging light is emitted in a direction opposite to the incident direction; the front-side retroreflection efficiency of the retroreflective element 33 comprising the hollow-depressed right-angled triangular pyramid apex microstructure 337 is very high, but the retroreflection efficiency is greatly attenuated at higher incident ray angles.

Referring to fig. 10, there is shown a side view of an opposing reflective element 33 comprising a hollow-recessed isosceles triangular pyramid right angle vertex microstructure 338 in an embodiment of the invention. The opposite direction reflection element 33 comprises a substrate 331, a plurality of hollow concave isosceles triangular pyramid right-angle vertex microstructures 338 are distributed on the surface of the substrate 331, a high reflection coating 332 is arranged on a concave surface of each hollow concave isosceles triangular pyramid right-angle vertex microstructure 338 departing from the substrate 331, and specifically, the high reflection coating 332 is arranged on three mutually perpendicular triangular surfaces of each hollow concave isosceles triangular pyramid right-angle vertex microstructure 338. When the imaging light enters the opposite direction reflection element 33, the imaging light firstly propagates to the inside of the hollow recessed isosceles triangular pyramid right-angle vertex microstructure 338, and three times of reflection occurs at three mutually perpendicular triangular surfaces of the hollow recessed isosceles triangular pyramid right-angle vertex microstructure 338, and the reflected imaging light exits along the direction opposite to the incident light; the front-side retroreflective element 33 comprising the hollow-recessed isosceles triangular pyramid right-angle apex microstructure 338 has a front-side retroreflective efficiency that is lower than the reflective efficiency of the hollow-recessed isosceles triangular pyramid right-angle apex microstructure 337 of the retroreflective element 33, but the retroreflective efficiency is not significantly attenuated when the incident light angle is large.

Referring to FIG. 11, there is shown a side view of an opposing reflective element 33 comprising hollow-recessed cube-corner apex microstructures 339. The opposite direction reflecting element 33 comprises a substrate 331, a plurality of hollow concave cube-corner right-angle vertex microstructures 339 are distributed on the surface of the substrate 331, a high-reflection coating 332 is arranged on the concave surface of the hollow concave cube-corner right-angle vertex microstructures 339, which faces away from the substrate 331, and specifically, the high-reflection coating 332 is arranged on three mutually perpendicular cube surfaces of the hollow concave cube-corner right-angle vertex microstructures. When the imaging light is incident on the opposite direction reflection element 33, the imaging light first propagates to the inside of the hollow depressed cube-corner right-angle vertex microstructure 339, and three reflections occur at three mutually perpendicular cube faces of the hollow depressed cube-corner right-angle vertex microstructure 339, and the reflected imaging light exits in the direction opposite to the incident light.

According to the above, the embodiment of the present invention can design different opposite direction reflection elements 33 according to different substrates 331 and microstructures, so as to realize the opposite direction reflection function of the imaging light, so that the imaging direction incident on the opposite direction reflection elements 33 can be reflected to the transflective mirror 32 along the direction opposite to the incident direction, and through the transmission of the transflective mirror 32, the light outlet 11 emits to the area far away from the housing 10 and forms the real image 50, thereby providing a good visual experience.

On the basis of the above implementation, since a part of the imaging light emitted from the image source 31 is lost during the process of using the transflective lens 32, the use efficiency and the imaging efficiency of the imaging light are reduced, for example: if the transmittance and reflectance of the half mirror 32 to the imaging light are both 50%, 50% of the imaging light emitted from the image source 31 will be reflected by the half mirror 32, and the remaining 50% will be lost, and the reflected 50% of the imaging light will be reflected by the opposite reflection element 33 and then enter the half mirror 32 again, at this time, only half of the 50% of the imaging light entering the half mirror 32 will be transmitted to the region far away from the housing 10 to form the real image 50, and the remaining half will be lost, that is, in the whole process, two light loss processes occur, and only 25% of the light will be used for imaging, so as to greatly reduce the utilization rate of the imaging light and the imaging effect.

In order to improve the light utilization effect and the imaging efficiency, it is preferable that the display module 30 further includes a phase retardation element 34 and a polarization transflective element 35 disposed on the side of the transflective mirror 32 close to the image source 31, as shown in fig. 12, wherein the polarization transflective element 35 allows the light of the first polarization characteristic to be reflected and allows the light of the second polarization characteristic to be transmitted.

Specifically, the imaging light emitted from the image source 31 includes light having a first polarization characteristic and light having a second polarization characteristic, in the process of propagation of the imaging light, the light having the first polarization characteristic in the imaging light is reflected by the transparent mirror 32, the light having the second polarization characteristic in the imaging light is transmitted by the transparent mirror 32, the reflected light undergoes a first phase change by the phase delay element 34, the light having the first phase change is reflected by the opposite reflection element 33, the reflected light undergoes a second phase change by the phase delay element 34, the light having the second phase change is changed into light having the second polarization characteristic to be transmitted by the polarization transparent mirror 35, and the transmitted light is emitted to an area far away from the housing 10 through the light outlet 11 to form the real image 50.

Through foretell setting, can avoid the loss of light once, only the loss process of light has appeared once, just so corresponding improvement imaging light's utilization ratio and formation of image effect.

On the basis of the implementation mode, the polarization directions of the first polarization characteristic and the second polarization characteristic are perpendicular to each other, the first polarization characteristic is P polarization, and the second polarization characteristic is S polarization; or the first polarization characteristic is S polarization, the second polarization characteristic is P polarization, the phase retardation element 34 may be 1/4 wave plate, the 1/4 wave plate may be attached to the side of the counter reflection element 33 close to the transflective mirror 32, the polarization transflective element 35 may be, for example, a polarization beam splitter, a polarization splitting film, or the like, specifically, an individual film layer or a plurality of film layers may be stacked and formed on the transflective mirror 32, and the components of the film layers are selected from metal oxide, metal nitride, metal oxynitride coating film, fluoride, and/or organic polymer; can be one or more of tantalum pentoxide, titanium dioxide, magnesium oxide, zinc oxide, zirconium oxide, silicon dioxide, magnesium fluoride, silicon nitride, silicon oxynitride, aluminum fluoride, it can be understood that the transflective mirror 32 in the embodiment of the present invention is common, does not have polarization characteristics, and the transflective mirror 32 has polarization transflective performance by disposing the polarization transflective element 35 on the surface thereof, and the transflective mirror 32 and the polarization transflective element 35 can also be combined and replaced by the transflective mirror 32 having polarization transflective performance of an integral structure, which should all be regarded as an extension of the embodiment of the present invention.

It should be noted that the polarization transflective element 35 reflects light with the first polarization characteristic and transmits light with the second polarization characteristic, but it is not meant that the polarization transflective element 35 reflects only light with the first polarization characteristic and transmits light with the second polarization characteristic, and it is specifically understood that when the first polarization characteristic is P-polarization and the second polarization characteristic is S-polarization, the polarization transflective element 35 has a higher reflectivity for P-polarization light and a higher transmittance for S-polarization light, such as an average reflectivity of the polarization transflective element 35 for P-polarization light greater than 70%, preferably greater than 80%, or even greater than 90%, and an average transmittance for S-polarization light greater than 70%, preferably greater than 80%, or even greater than 90%.

As shown in fig. 13, the image source 31 emits the imaging light having the first polarization characteristic, exemplarily, P polarization, and the second polarization characteristic is S polarization, after the imaging light emitted from the image source 31 enters the polarization transflective element 35, the polarization transflective element 35 reflects the P polarization and transmits the S polarization, the reflected P polarization is converted into circularly polarized light by the phase retarder 34, the circularly polarized light is reflected by the opposite reflective element 33 and is converted into S polarization by the phase retarder 34 again, and the S polarization is transmitted to the light outlet 11 by the polarization transflective element 35, so as to form the real image 50 in a region far from the housing 10.

It should be noted that, the position of the phase delay element 34 in the embodiment of the present invention may be set according to actual conditions, for example, it may have a certain interval with the opposite direction reflection element 33, or may be directly set on the surface of the opposite direction reflection element 33, that is, the phase delay element 34 is attached to the surface of the opposite direction reflection element 33 in contact, so as to reduce the reflection of the air medium layer between the phase delay element 34 and the opposite direction reflection element 33, improve the quantity of light penetrating through the phase delay element 34, further improve the light efficiency, and brighten the image.

In the embodiment of the present invention, since the imaging light will exit from the inside of the casing 10 to the area far away from the outside of the casing 10 via the light exit 11 to form the real image 50, when the user views the real image 50, the user may directly see the image formed on the surface of the image source 31 through the light exit 11, and in order to avoid this, in a preferred implementation manner of the embodiment of the present invention, the display assembly 30 further includes the light blocking element 36.

Specifically, the light blocking element 36 is disposed on the light path of the image source 31, the light blocking element 36 is mainly used for blocking the imaging light emitted from the image source 31 at a preset angle, the structure and the operation principle of the light blocking element 36 are as shown in fig. 14, the light blocking element 36 includes a plurality of light blocking barriers, wherein the plurality of light blocking barriers are distributed in an array to realize physical blocking of light propagating in some directions, and the angle of the light visible to the user can be limited by designing the height and the width of the light blocking barriers, for example, in the example of fig. 14, the light can be limited within the visible angle γ by disposing the light blocking element 36, such as the visible angle γ is 60 °, 70 ° or 80 °, that is, when the human eye of the user is located within the visible angle γ, the light directly emitted from the image source 31 can be observed, and when the human eye of the user is located outside the visible angle γ, the imaging light directly emitted from the image source 31 cannot be observed.

In some optional implementations, as shown in fig. 15, the image source 31 includes: the light source module 311 is used for emitting source light, the light diffusion element 312 is used for diffusing the source light, and the image generation layer 313 is used for converting the diffused source light into imaging light.

It should be noted that the source light emitted from the light source module 311 has a divergence angle (the maximum included angle between the normal line at the center of the light source module 311 and the outgoing light), and therefore, the source light emitted from the light source module 311 is emitted in various directions within the divergence angle at various angles (the angle between the normal line at the center of the light source 3111 and the outgoing light), so that it can be obtained that a part of the source light may be directly emitted to the opposite reflection element 33 for reflection, thereby reducing the imaging effect of the imaging light, and to solve this problem, the light emitting surface 311511 of the light source module 311 can be disposed toward the transparent mirror 32, so as to increase the number of the source light emitted from the image source 31 to the transparent mirror 32, decrease the number of the source light emitted from the image source 31 to the opposite reflection element 33, and accordingly increase the imaging effect of the imaging light, in the example of fig. 16 (in fig. 16, the light diffusion element 312 is not shown), the included angle between the light source module 311 and the transflective lens 32 can be 15 degrees to 60 degrees, preferably, the included angle between the light source module 311 and the transflective lens 32 is set to 30 degrees, and the compact structure of the whole sound box can be ensured while the imaging effect is improved.

Specifically, the light source module 311 includes at least one light source module 311, the light source module 311 is configured to emit source light, when the light diffusion element 312 is not disposed between the light source module 311 and the image generation layer 313, the source light emitted from the light source module 311 may be transmitted to the image generation layer 313 along a dotted line in fig. 15, and when the light diffusion element 312 is disposed between the light source module 311 and the image generation layer 313, the light diffusion element 312 may diffuse the source light to form source light with multiple emission angles, where two edge source light with the largest diffusion angle are shown in fig. 15, that is, the light diffusion element 312 may diffuse the source light within a certain range, so as to improve uniformity of distribution of the source light, and further improve an imaging effect.

Further, the light diffusing element 312 may be embodied as a relatively low cost scattering optical element, such as: a light-homogenizing sheet, a diffusion sheet, or the like, or the light-diffusing element 312 may be a Diffractive Optical Element (DOE) having a good control of the diffusion effect, such as a Beam shaping sheet (Beam Shaper); the diffraction optical element mainly plays a role in expanding light beams through diffraction by designing a specific microstructure on the surface, and the size and the shape of the diffused light beams are controllable. Preferably, the light beam transformed by the source light after passing through the light diffusing element 312 in the embodiment of the present invention has a specific shape in a cross section perpendicular to the propagation direction, that is, 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.

Based on the above embodiments of the present application, the number of the light diffusion elements 312 may include a plurality of light diffusion elements 312, the light diffusion elements 312 are sequentially disposed on the light emitting path of the light source module 311, and a preset distance is formed between adjacent light diffusion elements 312.

In practical applications, when one light diffusion element 312 is used to diffuse source light once, a good light uniformity effect cannot be perfectly achieved, for example, when there are a plurality of light source modules 311, a dark area is easily formed at a gap between the plurality of light source modules 311, which is not good enough to make the light distribution uniform. Therefore, in the embodiment of the present invention, the uniformity of light distribution is further improved by disposing the plurality of light diffusion elements 312, and the source light emitted from the light source module 311 can be diffused by the plurality of light diffusion elements 312, so that the imaging brightness of the image generation layer 313 is relatively uniform. Among them, the plurality of light diffusing elements 312 may be the same diffusing element, and specifically may be a diffractive optical element such as a Beam Shaper (Beam Shaper) or the like; or may also be a scattering optical element, such as a light homogenizing sheet, a diffusion sheet, etc., and the specific structure can be referred to the description of the light diffusing element 312, which is not described herein again.

Meanwhile, in order to ensure that the plurality of light diffusion elements 312 can play a corresponding role, a preset distance is arranged between the adjacent light diffusion elements 312, and the preset distance can be specifically 5-30 mm, preferably 10-20 mm. Furthermore, the plurality of light diffusion elements 312 in the embodiment of the present invention may be disposed on the same side of the image generation layer 313, as shown in fig. 17; two light diffusion elements 312 may be dispersedly disposed on two sides of the image generation layer 313, and the light diffusion element 312 disposed on the light exit side of the image generation layer 313 needs to be closely attached to the image generation layer 313 to avoid affecting the image formation, as shown in fig. 18; the light diffusion elements 312 may also be disposed in the light source module 311 as long as a predetermined distance is maintained between the light diffusion elements 312.

Because the light diffusion elements 312 are spaced apart from each other by a predetermined distance, the light diffusion elements 312 increase the overall thickness of the image source 31, and therefore, preferably, the number of the light diffusion elements 312 is two, and the two light diffusion elements 312 not only can diffuse the source light well, but also have a smaller overall thickness of the image source 31; the number of the light diffusion members 312 may be further increased in addition to the two light diffusion members 312, and preferably, the specification of the light diffusion member 312 close to the light source module 311 is set such that the source light can be diffused in a circular range, and the specification of the light diffusion member 312 distant from the light source module 311 is set such that the source light can be diffused at an angle in the horizontal direction, thereby increasing the diffusion effect on the source light.

As shown in fig. 19, the number of the light diffusion elements 312 is three, and it should be noted that the number of the light diffusion elements 312 is not specifically limited in the embodiment of the present application.

It should be noted that, in the embodiment of the present invention, the image generating layer 313 includes a liquid crystal panel, as shown in fig. 20, the liquid crystal panel includes a liquid crystal layer 3131 and a first polarizer 3132 and a second polarizer 3133 disposed on two sides of the liquid crystal layer 3131, polarization directions of the first polarizer 3132 and the second polarizer 3133 are perpendicular to each other, the first polarizer 3132 is closer to the light source module 311 than the second polarizer 3133, the first polarizer 3132 is used for transmitting light with a first polarization characteristic, the second polarizer 3133 is used for transmitting light with a second polarization characteristic, and after source light emitted from the light source module 311 and including the source light with the first polarization characteristic transmits the first polarizer 3132, the source light with the first polarization characteristic is converted into imaging light with a second polarization characteristic carrying image information through the liquid crystal layer 1, and then the imaging light with the second polarization characteristic is emitted through the first polarizer 3132, specifically, the first polarization characteristic is P polarization, and the second polarization characteristic is S polarization; or the first polarization characteristic is S polarization and the second polarization characteristic is P polarization.

As can be seen from the above, when the image generation layer 313 is a liquid crystal panel, the liquid crystal panel can only utilize the source light with a specific polarization characteristic, such as the source light with the second polarization characteristic, but the source light 3111 emitted from the light source module 311 is generally unpolarized light, that is, only 50% of the source light emitted from the light source module 311 can be utilized by the image generation layer 313 to form an image, and the rest 50% of the source light is wasted.

In order to improve the utilization rate of the light, in the embodiment of the present invention, 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 source light emitted from the light source 3111 includes a light with a first polarization and a light with a second polarization, the polarization beam splitter 3112 is configured to split the light incident thereto into the light with the first polarization and the light with the second polarization, the light with the first polarization is emitted to the light diffuser 312, the light with the second polarization is emitted to the reflector 3113, the reflector 3113 is configured to change the propagation direction of the light incident thereto to be emitted to the light diffuser 312, and the polarization converter 3114 is configured to convert the light with the polarization, which cannot be utilized by the image generation layer 313, of the light with the first polarization and the light with the second polarization into the light with the polarization that can be utilized by the image generation layer 313 The layer 313 utilizes light of a polarization characteristic. Illustratively, in fig. 21, the first polarization characteristic is S-polarization and the second polarization characteristic is P-polarization.

Through the arrangement, the light with the second polarization characteristic which cannot be utilized by the liquid crystal panel is converted into the first polarization characteristic, and the converted light is further utilized by the liquid crystal panel, so that the utilization rate of the source light is improved.

In some optional implementations of the embodiments of the present invention, as shown in fig. 21, wherein the source light line for emitting from the light source 3111 includes a light ray with a first polarization characteristic and a light ray with a second polarization characteristic, the light ray with the first polarization characteristic emitted from the light source 3111 is transmitted to the light diffusing component 312 via the polarization beam splitting component 3112, the light ray with the second polarization characteristic emitted from the light source 3111 is reflected to the reflecting component 3113 via the polarization beam splitting component 3112, the reflecting component 3113 reflects the light ray with the second polarization characteristic reflected by the polarization beam splitting component 3112 to the polarization converting component 3114, the polarization converting component 3114 converts the light ray with the second polarization characteristic reflected by the reflecting component 3113 into the light ray with the first polarization characteristic, for diffusion by the light diffusing element 312, illustratively, in fig. 21, the first polarization characteristic is S-polarization and the second polarization characteristic is P-polarization.

In another alternative implementation of the embodiment of the present invention, as shown in fig. 22, 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 source light emitted from the light source 3111 includes a light with a first polarization characteristic and a light with a second polarization characteristic, the light with the second polarization characteristic emitted from the light source 3111 is transmitted to the polarization converter 3114 through the polarization beam splitter 3112, the polarization converter 3114 converts the light with the second polarization characteristic transmitted through the polarization beam splitter 3112 into the light with the first polarization characteristic, the light having the first polarization characteristic emitted from the light source 3111 is diffused by the light diffusing element 312, and is reflected by the polarization beam splitter 3112 to the reflecting element 3113, and the reflecting element 3113 reflects the light having the first polarization characteristic reflected by the polarization beam splitter 3112 to the light diffusing element 312.

Specifically, 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, which generates Light by electric Field excitation, including but not limited to Light Emitting Diodes (LEDs), Organic Light Emitting Diodes (OLEDs), Mini Light Emitting diodes (Mini LEDs), Micro Light Emitting diodes (Micro LEDs), Cold Cathode Fluorescent Lamps (CCFLs), Cold Light sources (Cold LED lights, CLLs), Electro Luminescence (ELs), EL), electron Emission (Field Emission Display, FED), Quantum Dot Light Sources (QDs), and the like, and in some optional implementations of embodiments of the present invention, the Light source 3111 may include 4 LEDs, each including 16 Light bars, to ensure the brightness of the imaged Light.

The polarization beam splitter 3112 includes optical elements for splitting light by light transmission and light reflection, for example, the polarization beam splitter 3112 can simultaneously transmit light of a first polarization characteristic and reflect light of 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.

It should be noted that, the polarization beam splitter 3112 may be specifically a transflective beam splitter, and the polarization beam splitter 3112 transmits light of the first polarization characteristic and reflects light of the second polarization characteristic, which does not mean that the polarization beam splitter 3112 only transmits light of the first polarization characteristic and reflects light of the second polarization characteristic, and specifically, it is understood that the polarization beam splitter 3112 has a high reflectivity for light of the first polarization characteristic and a high transmissivity for light of the second polarization characteristic, such as the average transmissivity of the polarization beam splitter 3112 for light of the first polarization characteristic is greater than 70%, preferably greater than 80%, or even greater than 90%, and the average reflectivity for light of the second polarization characteristic is greater than 70%, preferably greater than 80%, or even greater than 90%; the specific embodiment and operation principle of the polarization beam splitting film layer for splitting by light transmission and reflection are the above polarization transflective element 35, and are not described herein again.

The reflecting element 3113 changes the propagation direction of light by reflection, and the reflecting element 3113 includes a mirror plated with a metal layer, a polished metal plate, and the like, and may also be an element having a polarization reflection function like the polarization beam splitter 3112, as long as it is ensured that light can be reflected out as efficiently as possible; in some embodiments, the reflective element 3113 may be made of the same material and have the same polarization reflection performance as the polarization beam splitter 3112, which facilitates uniform installation of the elements in the display module.

The polarization conversion device 3114 is a device that changes the phase of light passing through the polarization conversion device 3114, and the light with the second polarization characteristic is converted into light with the first polarization characteristic after passing through the polarization conversion device 3114, specifically, the polarization conversion device 3114 may be 1/2 wave plate or 1/4 wave plate.

In addition to the above, since the source light emitted from the light source 3111 has a certain dispersion angle, light with a large dispersion angle, for example, light with a dispersion angle larger than 30 °, 45 °, 60 °, or 75 °, is emitted all around, and is difficult to reach the polarization beam splitter 3112 for further imaging.

In order to solve the above problem, as shown in fig. 23, the light source module 311 in the embodiment of the present invention further includes a light guide element 3115, wherein the light guide element 3115 is disposed between the light source 3111 and the polarization beam splitter 3112, and is mainly used for transmitting the source light emitted from the light source 3111 to the polarization beam splitter 3112.

Specifically, in some alternative implementations, as shown in fig. 24, the light guide member 3115 includes a solid transparent member 31151 with a reflective surface, the light exit surface 311511 of the solid transparent member 31151 faces the polarization beam splitter 3112, and the light source 3111 is disposed at an end of the solid transparent member 31151 away from the light exit surface 311511, it can be understood that the source light generated by the light source 3111 has a divergence angle (the maximum included angle between the normal at the center of the light source 3111 and the outgoing light ray), and therefore, the source light emitted from the light source 3111 exits from the light source 3111 at a plurality of angles (the angle between the normal at the center of the light source 3111 and the outgoing light ray) in various directions within the divergence angle, wherein the source light with a smaller divergence angle (the included angle with the normal at the center of the light source 3111 is smaller, for example, 10 degrees, 15 degrees, 20 degrees, etc.) exits from the light source 3111 directly to the light exit surface 311511, and the source light with a larger divergence angle (the included angle with, e.g., 30 degrees, 45 degrees, 60 degrees, etc.) to be emitted from the light source 3111 to the reflective surface in the solid transparent member 31151 and reflected, and the source light rays after reflection converge, which can correspondingly improve the utilization rate of the light source 3111, preferably, the surface shape of the reflective surface of the solid transparent member 31151 is designed to change the source light rays after reflection by the reflective surface into collimated light rays, where the collimated light rays are parallel or nearly parallel light rays, and the divergence angle of the collimated light rays is small, which is more favorable for imaging.

The refractive index of the solid transparent member 31151 is larger than 1, and the light-reflecting surface of the solid transparent member 31151 has 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 splitter 3112, fig. 24 schematically shows a schematic diagram of transmission of source light emitted from the light source 3111 through the solid transparent member 31151, since the refractive index of the solid transparent member 31151 is greater than 1, and the medium around the solid transparent member 31151 is generally air (refractive index is 1), when the source light emitted from the light source 3111 reaches the inner surface of the solid transparent member 31151, the source light is emitted from the optically dense medium (i.e., the solid transparent member 31151) to the optically thinner medium (i.e., air), and the incident angle of the source light reaches a predetermined angle, and thus the light reflection surface of the solid transparent member 31151 is specifically the inner surface of the solid transparent member 31151; by designing the shape of the solid transparent member 31151, part of the source light emitted from the light source 3111 can be reflected to reduce the divergence angle and be emitted; the other part of the light is directly transmitted through the solid transparent part 31151 and then exits through the light exit surface 311511 to the polarization beam splitter 3112, so as to improve the conversion efficiency of the source light.

Optionally, the cross-sectional shape of the light exit surface 311511 along the light propagation direction includes 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.

Preferably, as shown in fig. 25, the end of the solid transparent member 31151 is 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. The collimating element 31153 may collimate and emit the source light beam with a small divergence angle emitted from the light source 3111 in the solid transparent member 31151, and emit the other source light beam with a large divergence angle after being reflected on the reflective surface of the solid transparent member 31151, and preferably, the surface shape of the reflective surface of the solid transparent member 31151 may be designed to change the source light beam reflected by the reflective surface into a collimated light beam, and further, the collimating element 31153 is a collimating lens, the light source 3111 is disposed at the focus of the collimating lens, and the collimating lens may be made of the same material as the solid transparent member 31151, thereby facilitating integration.

Alternatively, as shown in fig. 26, the end of the solid transparent member 31151 where the light source 3111 is disposed is provided with a cavity 311512, the light exit surface 311511 of the solid transparent member 31151 is provided with a groove 311513 extending toward the end, and the bottom surface of the groove 311513 near the end is provided with a collimating element 31153. The light source 3111 is disposed in the cavity 311512, the collimating element 31153 collimates the source light beam emitted from the light source 3111 in the solid transparent member 31151 and having a small divergence angle, and emits the other source light beam having a large divergence angle after being reflected in the solid transparent member 31151, and the surface shape of the light reflecting surface of the solid transparent member 31151 is designed so that the source light beam reflected by the light reflecting surface becomes a collimated light beam; alternatively, the collimating element 31153 is a collimating lens, the light source 3111 is disposed at the focal point of the collimating lens, and the collimating lens may be made of the same material as the solid transparent member 31151, so as to facilitate integration.

In another alternative implementation, the light guide element 3115 may also adopt the design of the hollow lamp cup 31152, as shown in fig. 27, the hollow lamp cup 31152 includes a hollow housing surrounded by a light reflecting surface, the opening 311521 of the hollow lamp cup 31152 faces the polarization beam splitter 3112, an end of the hollow lamp cup 31152 away from the opening 311521 is used for disposing the light source 3111, and the source light emitted from the light source 3111 is reflected when entering the light reflecting surface, so that the source light reflected by the light reflecting surface exits to the polarization beam splitter 3112.

Specifically, the reflective surface of cavity shell is including aluminizing, silver-plating, plate other metals or the reflective surface that the plating medium membrane formed, and light can reflect on the reflective surface, and through setting up the cavity shell, the source light that has great divergence angle of light source 3111 outgoing takes place the reflection at the reflective surface of cavity shell, and the angle change of the source light after the reflection gathers together to the center, can improve the utilization ratio of the source light of light source 3111 outgoing, and then has improved the light efficiency of audio amplifier.

In some optional implementations of embodiments of the present disclosure, the shape of opening 311521 includes at least one of a circle, an ellipse, a rectangle, a trapezoid, a parallelogram, or a square; the end of hollow lamp cup 31152 remote from opening 311521 may be shaped in at least one of a circle, an oval, a rectangle, a trapezoid, a parallelogram, or a square.

Optionally, the hollow housing may specifically include at least one of a parabolic shape, a conic shape, or a free-form surface shape, and the shape of the hollow housing specifically refers to the shape of the light reflecting surface; it will be appreciated that the shape of the hollow housing may be different from the shape of the reflective surface, provided that the reflective surface is of a shape that allows light to be reflected as described above; for convenience of explanation in the embodiment of the present application, the shape of the hollow shell is consistent with that of the light reflecting surface.

On the basis of the above implementation, a corresponding collimating element 31153 may also be disposed on the hollow lamp cup 31152, and the collimating element 31153 may be a collimating lens or a collimating film, and the collimating lens includes one or more of a convex lens, a fresnel lens, and 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.). Specifically, the collimating element 31153 may be a convex lens, and the light source 3111 may be disposed at a focal length of the convex lens, that is, a distance between the convex lens and the light source 3111 is the focal length of the convex lens, so that the source light beams emitted from 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, such as a BEF Film (Brightness Enhancement Film), for adjusting the emitting direction of the source light rays to be within a preset angle range, for example, to focus the source light rays within an angle range of ± 35 ° from the normal of the collimating Film. The collimating element 31153 may cover all source light beams emitted from the light source 3111, and may also cover a part of source light beams emitted from the light source 3111. Collimated parallel light rays are subsequently transmitted to the image generation layer 313, the divergence angle of source light rays is small, and the source light rays are good in consistency, so that the conversion efficiency of the image generation layer 313 to imaging light rays can be improved, and the lighting effect of the sound box is improved.

Specifically, as shown in fig. 28, the collimating element 31153 is disposed inside the hollow housing for converting the source light passing through the hollow housing into collimated light, optionally, the collimating element 31153 may be a collimating lens or a collimating film, which is illustrated as a collimating lens in fig. 27, and the collimating element 31153 may be a convex lens, and then the light source 3111 may be disposed at a focal length of the convex lens, that is, a distance between the convex lens and the light source 3111 is a focal length of the convex lens, so that the source light emitted from the light source 3111 in different directions can be collimated and emitted after passing through the collimating element 31153. Specifically, the collimating element 31153 collimates a portion of the source light transmitted in the hollow housing and then emits the collimated light to the direction control element, and the portion of the source light, specifically, the source light emitted from the light source 3111 with a small divergence angle, is converted into parallel or nearly parallel light after passing through the collimating element 31153; the light emitted from the light source 3111 with a large divergence angle is reflected by the reflective surface of the hollow housing and converted into collimated light, so that 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, and the utilization rate of the light is further improved.

Through setting up the leaded light component 3115 of solid transparent material or cavity shell design, on the one hand, the source light that has great divergence angle of light source 3111 outgoing takes place to reflect at the reflection of light surface of cavity shell, light turns into collimated light after the reflection, on the other hand, through additionally setting up collimating component 31153, can be more effective collimates the source light of light source 3111 outgoing, turn into parallel or nearly parallel collimated light with source light, parallel light divergence angle after the collimation is very little, the light uniformity is better, further the utilization ratio of source light has been improved, promote the formation of image luminance under the condition of low-power consumption.

The embodiment of the present invention provides an embodiment, light outlet 11 has been seted up on casing 10, formation of image light can form real image 50 to the region of keeping away from casing 10 through light outlet 11 outgoing, because display module 30 is including image source 31, mirror 32, multiple accurate optical element such as subtend reflection element 33, when using, in order to prevent that impurities such as dust from entering into casing 10 and influencing display module 30's result of use, consequently, mirror 32 can be set up in light outlet 11 department, so that mirror 32 can seal light outlet 11, prevent that impurities such as dust from entering into casing 10 through light outlet 11 in, guarantee the formation of image effect of audio amplifier.

On the basis of the above embodiments of the present invention, as shown in fig. 29, a polarization transparent absorbing element 37 is further disposed on the transflective mirror 32, wherein the polarization transparent absorbing element 37 absorbs the light of the first polarization characteristic and allows the light of the second polarization characteristic to transmit.

Specifically, in the present embodiment, the light beam emitted from the image source 31 and having the first polarization characteristic is reflected by the transflective mirror 32, the polarization state of the reflected light beam is hardly changed, the light beam having the first polarization characteristic is emitted to the opposite reflective element 33, the opposite reflective element 33 emits the light beam having the first polarization characteristic in the opposite direction to the incident direction, the polarization characteristic of the light beam having the first polarization characteristic is changed by the phase delay element 34 during the propagation process, and is converted into the light beam having the second polarization characteristic, the transflective mirror 32 transmits the light beam having the second polarization characteristic, the polarization transflective element 37 can only transmit the light beam having the second polarization characteristic, the light beam having the incompletely converted polarization characteristic or the omitted light beam having the first polarization characteristic is absorbed by the polarization transflective element 37, so that only the light beam having the second polarization characteristic is transmitted as much as possible, the observation of the user on the real image is prevented from being influenced by glare, ghost images and the like caused by light rays with other polarization characteristics, and the watching experience of the user is improved.

The embodiment of the present invention provides a display module 30, through setting up, can form real image 50 in the region of keeping away from casing 10 and supply the user to carry out the vision to watch, and through set up sound source 20 in casing 10, then can propagate the audio frequency that sound source 20 sent through mouth of raising one's voice 12, it is concrete, sound source 20 can be the speaker, furthermore, still corresponding setting controller and memory in casing 10, the storage has different kinds of audio frequency in the memory, the controller then can call the audio frequency of storage in the memory and control sound source 20 according to user's control and play, preferably, in order to prevent that the dust from getting into casing 10 through mouth of raising one's voice 12, still can set up dust-proof membrane 40 at mouth of raising one's voice 12, the material of dust-proof membrane 40 can be fibrous material, can reduce the influence of dust-proof membrane 40 to sound like this.

In some optional implementations, the housing is further provided with:

It is specific, the microphone can realize gathering user's speech information, and realize voice interaction through the controller, increase user's use and experience, bluetooth module and WIFI module can realize and remote terminal and the network between data connection, data interface specifically can be the USB interface, the USB interface is including a plurality of, but its effect is mainly for external memory, shift corresponding data, the storage, and is further, for the convenience of controlling opening or closing of audio amplifier, can set up corresponding shift knob on casing 10, the opening or closing of the steerable audio amplifier of shift knob, it is specific, shift knob can be the knob formula, touch-control formula or push type.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. An acoustic enclosure, comprising:

a housing;

a sound source housed within the housing;

a light outlet and a speaker port provided in the housing; and

a display component;

wherein,

2. An acoustic enclosure according to claim 1,

the opposing reflective element has an arc that curves toward the transflective mirror.

3. The acoustic enclosure of claim 1, wherein the counter-reflective element comprises a substrate and a plurality of microstructures distributed on the substrate.

4. The acoustic enclosure of claim 3, wherein the microstructures comprise at least one of solid transparent right angle vertex microstructures, solid transparent spherical microstructures, or hollow recessed right angle vertex microstructures distributed over the surface of the substrate.

5. The acoustic enclosure of claim 1, wherein the display assembly further comprises:

a phase delay element; and

wherein,

6. An acoustic enclosure according to claim 5,

the transflective lens is provided with a polarization transflective element;

7. The acoustic enclosure of claim 1, wherein the display assembly further comprises:

a light blocking element;

8. An acoustic enclosure according to claim 1,

the image source includes:

at least one light source module;

a light diffusing element; and

an image-generating layer;

9. An acoustic enclosure according to claim 8,

the light diffusion elements are arranged on the light emitting path of the light source module in sequence, and a preset distance is reserved between every two adjacent light diffusion elements.

10. An acoustic enclosure according to claim 8,

the light source module includes:

a light source;

a polarization beam splitting element;

a reflective element; and

a polarization conversion element;

11. The loudspeaker of claim 10,

the light source module further comprises:

a light guide element;

12. An acoustic enclosure according to claim 11,

the light guide element comprises a hollow shell surrounded by a reflecting surface, the opening direction of the hollow shell faces the polarization beam splitting element, the end part, far away from the opening, of the hollow shell is used for arranging the light source, source light emitted by the light source is reflected when being incident to the reflecting surface, and therefore the source light reflected by the reflecting surface is emitted to the polarization beam splitting element.

13. An acoustic enclosure according to claim 1,

the transflective lens is arranged at the light outlet.

14. An acoustic enclosure according to claim 1,

dustproof cloth is arranged at the loudspeaker opening.

15. An acoustic enclosure according to claim 1,

still be provided with on the casing: