Suspension display device

Abstract

The suspension display device comprises a box body, a controller, an optical assembly and a display device, the controller, the optical assembly and the display device are arranged on the box body, and the display device comprises a plurality of light sources, a plurality of light gathering pieces and a display panel; wherein the light gathering pieces and the light sources are arranged in a one-to-one correspondence mode, the light sources are used for emitting illumination light under electric control of the controller, the light gathering pieces are used for reflecting the part, back on to the display panel, of the illumination light so as to emit the part to the display panel, and the illumination light forms image light emitted to the optical assembly through the display panel. The image light forms a suspension image outside the box body under the action of the optical assembly, and the technical scheme of the application can improve the brightness and contrast of the suspension image, thereby obtaining a better suspension display effect.

Description

Technical Field

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

[0002] Suspended display uses a series of optical devices to suspend the real image in the air. The real image is observed by both eyes at the same time, making the observer feel that the image has left the display device, forming a sense of suspension. This technology has great application prospects in advertising, education, military and other fields.

[0003] The current suspension display optical system structure includes a display screen and an optical component. The image light emitted by the display screen is reflected by the optical component and then focused in the air to form a suspended real image, thus giving users a different experience. However, the display brightness of the existing display screen is not high, which results in a low brightness of the suspended image, which is easily affected by stray light such as ambient light, resulting in a poor display effect and low contrast. Utility Model Content

[0004] The embodiment of the present application provides a suspension display device, which can improve the brightness and contrast of a suspension image, thereby obtaining a better suspension display effect.

[0005] The embodiment of the present application provides a suspension display device, including a box body and a controller, an optical component, and a display device arranged in the box body, wherein the display device includes a plurality of light sources, a plurality of light focusing elements, and a display panel;

[0006] Among them, the focusing element and the light source are arranged in a one-to-one correspondence. The light source is used to emit illumination light under the electronic control of the controller. The focusing element is used to reflect the part of the illumination light that is emitted in a direction away from the display panel so as to be emitted toward the display panel. The illumination light passes through the display panel to form an image light that is emitted toward the optical component. The image light is formed into a suspended image outside the box body under the action of the optical component.

[0007] In a possible implementation, the light focusing element includes a curved reflective surface disposed toward the light source, and the curved reflective surface is used to direct a portion of the illumination light whose outgoing direction is away from the display panel toward the display panel in the form of parallel light.

[0008] In this implementation, the light focusing element reflects the illumination light emitted by the light source in a direction facing away from the display panel, thereby increasing the brightness of the light from the light source and further increasing the display brightness of the floating image.

[0009] In one possible implementation, the focusing element is a metal cover, and the curved surface of the metal cover facing the light source is polished to form an arc-shaped reflective surface; or, the focusing element includes a base with an arc-shaped structure, and the curved surface of the base facing the light source is attached, coated or plated with a reflective layer, and the reflective layer is formed into an arc-shaped reflective surface.

[0010] In this implementation, the curved reflective surface can evenly distribute the illumination light on the display panel, avoiding the problem of the illumination light being too concentrated or too dispersed, thereby improving the uniformity of the display effect, and further improving the contrast of the display effect, making the image clearer and more delicate.

[0011] In a possible implementation, a collimating lens is further included. The collimating lens is disposed between the light source and the display panel, and is used to collimate the illumination light emitted by the light source.

[0012] In this implementation, the collimating lens is used to collimate the portion of illumination light emitted by the light source that is emitted in a direction forward to the display panel, so that the focusing degree and collimation of the light can be improved, thereby improving the illumination effect.

[0013] In a possible implementation, the controller controls each light source to operate independently.

[0014] In this implementation, according to the content displayed on the display panel, the controller controls each light source to independently turn on or off and adjust the brightness of the light emitted by the light source, thereby improving the contrast of the suspended image.

[0015] In one possible implementation, the optical component includes a beam splitter and a retroreflective microprism array; the box body is provided with a accommodating cavity with an opening, the beam splitter cover is arranged at the opening, and the retroreflective microprism array and the display device are both arranged in the accommodating cavity; the image light emitted by the display device is reflected by the beam splitter and then emitted to the retroreflective microprism array, the retroreflective microprism array receives the image light and reflects the image light to the beam splitter, the image light further passes through the beam splitter and forms a suspended image outside the box body.

[0016] In a possible implementation, the beam splitter is a polarization beam splitter; the optical component further includes a quarter-wavelength phase modulator, which is located between the polarization beam splitter and the retroreflective microprism array and parallel to the retroreflective microprism array.

[0017] In this implementation, the brightness and contrast of the suspended image can be improved by using a polarization beam splitter and a quarter-wavelength phase modulation device.

[0018] In a possible implementation, a gesture recognition module is further included. The gesture recognition module is disposed on the box body and connected to the controller. The gesture recognition module is spaced apart from the opening.

[0019] In this implementation, the user interacts with the floating display device through a gesture recognition module, thereby improving the user experience of the application.

[0020] In one possible implementation, the box body assembly includes a surrounding frame with an opening and a panel assembly, the accommodating cavity is provided in the surrounding frame, the panel assembly is connected to the surrounding frame and covers part of the opening, the surrounding frame and the panel assembly are combined to form an opening, and a receiving groove is provided on the panel assembly and is spaced apart from the opening, and the gesture recognition module is accommodated in the receiving groove.

[0021] In this implementation, it is convenient to install a fixed gesture recognition module, and the gesture recognition module is spaced apart from the opening, thereby facilitating the user to interact with the floating display device.

[0022] In a possible implementation, a plurality of heat dissipation holes are provided on the surrounding frame, and the heat dissipation holes are connected with the accommodating cavity and the outside.

[0023] In this implementation, the heat dissipation holes can improve the heat dissipation effect of the present application.

[0024] Based on the floating display device of the embodiment of the present application, the controller controls the light source to work, and the light source emits illumination light. The part of the illumination light output by the light source that is back to the display panel is reflected by the focusing piece, which can reduce the scattering and reflection loss of the illumination light, making it easier for these lights to be focused on the display panel, thereby improving the brightness of the display effect. Moreover, the focusing piece can evenly distribute these illumination lights on the display panel, avoiding the problem of the illumination light being too concentrated or too dispersed, thereby improving the uniformity of the display effect, and further improving the contrast of the display effect, making the image clearer and more delicate. The image light corresponding to the image source displayed on the display panel is transmitted to the floating display device, and the floating display device reflects the image light, thereby forming a floating image corresponding to the image source on the outside of the box body. Due to the action of the focusing piece, the image source displayed on the display panel has higher brightness and contrast, thereby improving the contrast and brightness of the floating image. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of the structure of a first viewing angle of a floating display device provided in an embodiment of the present application;

[0027] Figure 2 A side view of a suspended display device provided in an embodiment of the present application;

[0028] Figure 3 for Figure 2Sectional view at AA in the middle;

[0029] Figure 4 A diagram showing the light direction of an embodiment of a floating display device provided in an embodiment of the present application;

[0030] Figure 5 A schematic diagram of the structure of a light source according to an embodiment of the present application;

[0031] Figure 6 A schematic structural diagram of another embodiment of a light source provided in an embodiment of the present application;

[0032] Figure 7 An exploded view of a suspended display device provided in an embodiment of the present application;

[0033] Figure 8 A schematic diagram of the structure of a second viewing angle of a floating display device provided in an embodiment of the present application.

[0034] Description of Figure Numbers:

[0035] 10. Suspended display device; 100. Box body; 110. Frame; 111. Heat dissipation hole; 120. Panel assembly; 121. Receiving groove; 122. Mounting plate; 123. Fixing plate; 124. Connecting portion; 130. Bottom plate; 140. Opening; 150. Receiving cavity; 200. Suspended image; 300. Optical assembly; 310. Polarization beam splitter; 320. Retroreflective microprism array; 330. Quarter-wavelength phase modulation device; 400. Display device; 510. Light source; 511. Illuminating light; 600. Focusing element; 610. Base; 620. Reflective layer; 630. Arc-shaped reflecting surface; 410. Display panel; 411. Image light; 700. Collimating lens; 800. Gesture recognition module; 900. Circuit substrate.

[0036] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present application clearer, the following part will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0038] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0039] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0041] See also Figures 1 to 3 , Figure 1 is a schematic structural diagram of the first viewing angle of the suspension display device 10; Figure 2 is a side view of the suspended display device 10; Figure 3 for Figure 2 The embodiment of the present application provides a suspension display device 10, which includes a box body 100 and a controller (not shown in the figure) disposed in the box body 100, an optical component 300, and a display device 400. The display device 400 includes a plurality of light sources 510, a plurality of light focusing elements 600, and a display panel 410. The light sources 510 are electrically and signally connected to the controller. Under the control of the controller, please refer to Figure 4 , Figure 4 This is a light trend diagram of an embodiment of a floating display device 10 , where a light source 510 emits an illumination light 511 , which passes through a display panel 410 and forms an image light 411 directed toward an optical component 300 , and the image light 411 is formed into a floating image 200 outside the box body 100 under the action of the optical component 300 .

[0042] It should be noted that the light source 510 can be in the form of LED lamp beads, OLED (Organic Light Emitting Diode) organic light emitting diodes and other types. The display panel 410 is a liquid crystal display screen. The liquid crystal display screen is made of liquid crystal material, and contains a series of liquid crystal units inside. These liquid crystal units can adjust their light transmittance by controlling the electric field. When the electric field is applied to the liquid crystal unit, the liquid crystal molecules will rearrange and change the propagation mode of light. In this way, by applying different electric fields to the liquid crystal unit, the display and change of the image can be achieved. The light source 510 is used to provide illumination light 511, so as to illuminate the background of the liquid crystal display screen, so that the image displayed on the liquid crystal display screen can be seen by the observer. After the light emitted by the light source 510 passes through the liquid crystal unit of the liquid crystal display screen, according to the state of the liquid crystal unit, part of the light passes through or is blocked, thereby forming a visible image source on the liquid crystal display screen. The image light 411 corresponding to the image source is formed as a suspended image 200 corresponding to the image source outside the box body 100 under the action of the optical component 300.

[0043] In order to improve the display brightness of the image source, and thus improve the display brightness of the suspended image 200, it is necessary to increase the brightness of the light of the light source 510. The brightness of the existing light source 510 usually depends on the brightness of the light source 510 used. If higher brightness light is required, a common method is to replace a higher power light source 510. A high-power light source 510 can generate more light energy, thereby providing a brighter backlight effect. However, there are also some problems with using a high-power light source 510. First, a higher-power light source 510 is often more expensive, which may increase costs. Secondly, the heat generated by a high-power light source 510 is also higher, so heat dissipation and protection measures need to be considered to avoid other problems caused by overheating.

[0044] See also Figure 4 Please also refer to Figure 5 The display device 400 of the embodiment of the present application includes multiple light sources 510 and multiple focusing elements 600, wherein one focusing element 600 is arranged corresponding to one light source 510, and the light source 510 is located between the display panel 410 and the focusing element 600. The light source 510 can be an LED lamp bead, and emits an illumination light 511, and the illumination light 511 is directed toward the display panel 410. The focusing element 600 reflects the illumination light 511 emitted by the light source 510 and the emission direction is back to the display panel 410, and directs these illumination light 511 toward the display panel 410. In this way, the focusing element 600 can collect part of the illumination light 511 that is back to the display panel 410 and direct it toward the display panel 410, thereby improving the light brightness of the light source 510, and further improving the display brightness of the floating image 200.

[0045] Please also read Figure 6 The light concentrator 600 includes a curved reflective surface 630 disposed toward the light source 510. The curved reflective surface 630 is used to direct the portion of the illumination light 511 that is emitted in a direction opposite to the display panel 410 toward the display panel 410 in the form of parallel light. The light concentrator 600 reflects the portion of the illumination light 511 that is emitted from the light source 510 and is opposite to the display panel 410, and converts it into parallel light, which can reduce the scattering and reflection loss of the illumination light, making it easier for these lights to be focused on the display panel 410, thereby improving the brightness of the display effect. Moreover, the curved reflective surface 630 can evenly distribute these illumination lights 511 on the display panel 410, avoiding the problem of the illumination light 511 being too concentrated or too dispersed, thereby improving the uniformity of the display effect, and further improving the contrast of the display effect, making the image clearer and more delicate.

[0046] In some structural forms, the focusing element 600 is a metal cover, and the arc surface of the metal cover facing the light source 510 is polished to form the above-mentioned arc-shaped reflecting surface 630. The metal cover can be a metal material such as aluminum alloy or stainless steel, and the arc-shaped reflecting surface 630 is made on the metal cover by cutting, grinding, turning and other processing techniques. Then, the arc-shaped reflecting surface 630 is polished using polishing tools and materials. This can include mechanical polishing or manual polishing. By slowly grinding and polishing the surface of the arc-shaped reflecting surface 630, surface defects and roughness are gradually removed to achieve a smooth state. In this way, the arc-shaped reflecting surface 630 can reflect the illumination light 511, and such a processing technology is simple and convenient for mass production on the production line.

[0047] Among them, the light source 510 in the form of LED lamp beads can be fixed on a circuit substrate 900 through pins, and in the structural form of the light collecting member 600 being a metal cover, the light collecting member 600 can be fixed on the circuit substrate 900, and the light source 510 in the form of LED lamp beads can be fixed on the circuit substrate 900 through pins and then installed in front of the light collecting member 600 in a framed manner. In other installation forms, a mounting hole corresponding to each light source 510 can be provided on the circuit substrate 900, and the light collecting member 600 is embedded in the mounting hole, wherein the fixing connection method of the light collecting member 600 and the circuit substrate 900 can be bonding, hot-melt fixing, welding, connection through a connector, etc.

[0048] Please continue reading Figure 6, the focusing element 600 may also include a base body 610 of an arc structure, and a reflective layer 620 is attached, coated or plated on the arc surface of the base body 610 facing the light source 510, and the reflective layer 620 is formed into an arc-shaped reflective surface 630. The base body 610 may be a metal material (aluminum alloy or stainless steel, etc.), and an arc structure is formed on the metal material by cutting, grinding, turning and other processing techniques, and then the reflective layer 620 is arranged on the arc surface of the base body 610 facing the light source 510. Of course, a plastic material (such as polyethylene, polypropylene, polyvinyl chloride, etc.) may also be used to obtain the base body 610 by injection molding. Similarly, the connection form between the base body 610 and the circuit substrate 900 in this embodiment may refer to the description of the above embodiment.

[0049] The reflective layer 620 may be provided in the following ways: 1. Use reflective materials (such as reflective films or reflective stickers, etc.), cut these reflective materials into shapes that match the curved surface of the substrate 610, and attach them to the surface of the substrate 610 with adhesive or glue; 2. Use reflective coatings (such as reflective paint or aluminum reflective coatings or titanium dioxide reflective coatings), use brushes, spray guns or other coating tools to evenly coat the reflective coatings on the curved surface of the substrate 610. It can be understood that multiple coatings can be performed to ensure the thickness and uniformity of the reflective coating, thereby ensuring the stability of the light reflected by the reflective coating. After the coating is completed, drying and curing treatment is performed to make the reflective layer 620 firmly attached to the substrate 610; 3. Place the substrate 610 in a vacuum coating device, and deposit reflective materials (such as aluminum, silver or other metals) on the curved surface of the substrate 610 through coating techniques such as physical vapor deposition or chemical vapor deposition. By controlling the coating temperature, vacuum degree, coating time and other parameters, the thickness and quality of the reflective layer 620 can be ensured. Here, the present application does not impose any specific restrictions on the formation method of the substrate 610 and the reflective layer 620.

[0050] In addition, the formation of the focusing element 600 can also be achieved by forming an arc-shaped groove using a circuit substrate 900 on which the light source 510 is installed. The portion of the circuit substrate 900 in which the arc-shaped groove is formed is formed as the base 610 of the above-mentioned embodiment, and a reflective layer 620 is further provided on the surface of the arc-shaped groove according to the above-mentioned feasible solution.

[0051] Please continue reading Figure 6, the embodiment of the present application also includes a collimating lens 700, which is disposed between the light source 510 and the display panel 410, and the collimating lens 700 is used to collimate the illumination light 511 emitted by the light source 510. When the illumination light 511 is emitted to the display panel 410, it will first pass through the collimating lens 700, and the collimating lens 700 can correct the direction and shape of the light beam and focus the divergent light into a parallel light beam. It can be understood that the focusing element 600 is disposed on the back of the light source 510, that is, only the part of the illumination light 511 whose emission direction is back to the display panel 410 is reflected and converted into parallel light. The part of the illumination light 511 emitted by the light source 510 whose emission direction is forward to the display panel 410 will be diffused and scattered. The collimating lens 700 can collimate this part of the light, improve the focusing degree and collimation of the light, and thus improve the lighting effect. The collimating lens 700 may be a single spherical lens, a single aspherical lens, a compound lens or a Fresnel lens, etc. The present application does not impose any specific limitation on the form of the collimating lens 700.

[0052] In order to improve the contrast of the suspended image 200, the controller of the present application can control each light source 510 to operate independently. Specifically, during the operation of the liquid crystal display, each light source 510 can be controlled individually. According to the content displayed by the liquid crystal display, the controller controls each light source 510 to independently turn on, turn off and adjust the brightness of the light emitted by the light source 510. For example, when a specific area of ​​the liquid crystal display needs to display black, the light source 510 of the corresponding area can be turned off by the controller to avoid unnecessary light interference. When the content displayed in two adjacent areas on the liquid crystal display has a difference in light and dark, the controller adjusts the brightness of the light sources 510 of the two areas accordingly. In this way, the suspended image 200 can have a higher contrast during the display process, making the image details more clearly visible. In addition, in order to simplify the structure of the whole machine, the controller of the present application can be integrated on the circuit substrate 900 on which the light source 510 is installed.

[0053] In order to facilitate the control of each light source 510 to operate independently, the controller may use a digital signal processor (DSP). In some structural forms, the light source 510 includes a power management unit, which includes a power management chip and a driving circuit. The power line and signal line of the light source 510 are connected to the power management unit so that the brightness, switch and other parameters of the light source 510 can be controlled by the power management unit.

[0054] For example, a digital signal processor (DSP) is connected to the above-mentioned power management unit. Corresponding PWM signals and control logic are configured in the DSP to control the brightness and switching state of the light source 510. According to the image and content displayed by the display panel 410, the DSP will send relevant signals to the power management unit to control the brightness and switching state of each light source 510. If the brightness of a certain area needs to be adjusted, the DSP will adjust the duty cycle of its PWM signal accordingly to change the brightness of the light source 510 in the area. If a certain light source 510 needs to be turned off, the DSP will set the duty cycle of its PWM signal to zero, thereby turning off the light source 510.

[0055] Please refer to Figure 4 and Figure 7 The optical assembly 300 of the embodiment of the present application includes a beam splitter and a retroreflective microprism array 320. The box body 100 may be a rectangular structure, so that it is convenient to install the plate structure. Of course, in some other embodiments, the box body 100 may be a columnar structure or other structures. The box body 100 is provided with a housing cavity 150 having an opening 140, and the beam splitter cover is provided at the opening 140. The retroreflective microprism array 320 and the display device 400 are both provided in the housing cavity 150. The beam splitter is arranged opposite to the display surface of the display device 400, so that the display surface of the display device 400 faces the beam splitter, so that the image light 411 corresponding to the image source displayed on the display surface is transmitted to the beam splitter. The beam splitter receives the image light 411 emitted from the display surface, and reflects the image light 411, so that the image light 411 is reflected to the retroreflective microprism array 320. The retroreflective microprism array 320 has a retroreflective surface, and the retroreflective surface of the retroreflective microprism array 320 is arranged opposite to the beam splitter. The retro-reflective surface receives the image light 411 reflected from the beam splitter and reflects the image light 411 to the beam splitter, and the image light 411 further passes through the beam splitter, so that a suspended image 200 corresponding to the image source can be formed outside the box body 100 .

[0056] In some structural forms, the beam splitter is configured as a polarization beam splitter 310. The polarization beam splitter 310 is an optical device that can efficiently reflect linear polarized light of a specific vibration direction and efficiently transmit linear polarized light of another specific vibration direction. For the reflected linear polarized light, the polarization beam splitter 310 acts like a reflector, which can selectively reflect linear polarized light with a specific vibration direction, while transmitting or absorbing linear polarized light of other vibration directions. It can be understood that for the transmitted linear polarized light, the polarization beam splitter 310 acts like a transparent plate, which can selectively transmit linear polarized light of a specific vibration direction, while reflecting or absorbing linear polarized light of other vibration directions.

[0057] The optical assembly 300 also includes a quarter-wavelength phase modulator 330. The quarter-wavelength phase modulator 330 is an optical device that can generate a quarter-wavelength phase delay to the incident polarized light. Such a device usually has an optical axis, which can convert linear polarized light into circular polarized light, or convert circular polarized light into linear polarized light. In the embodiment of the present application, the quarter-wavelength phase modulator 330 is located between the polarization beam splitter 310 and the retroreflective microprism array 320, and is parallel to the retroreflective microprism array 320. By setting the polarization beam splitter 310 and the quarter-wavelength phase modulator 330, the polarization state of the incident light can be converted and adjusted, thereby improving the brightness of the suspended image 200. Specifically, if the light emitted by the display panel 410 is in a circular polarization state, the quarter-wavelength phase modulator 330 can change the phase difference of the light so that the phase difference of the circularly polarized light becomes a quarter wavelength (90 degrees) after passing through the phase modulator. In this way, the circularly polarized light processed by the phase modulator will be converted into linearly polarized light. After the circularly polarized light is converted into linearly polarized light, the light can pass through the polarization beam splitter 310 , thereby improving the brightness and contrast of the suspended image 200 .

[0058] See also Figure 1 and Figure 8 , the embodiment of the present application also includes a gesture recognition module 800, the gesture recognition module 800 is arranged on the box body 100 and connected to the controller, and the gesture recognition module 800 is spaced apart from the opening 140. The gesture recognition module 800 can improve the interactive experience between the user and the suspended display device 10. The gesture recognition module 800 includes a camera, which captures the user's gesture movements through the camera. Among them, when the camera is configured as a depth camera, it can provide more accurate gesture information because it can capture the three-dimensional information of the gesture. The gesture recognition module 800 also includes a processing module and an interaction module. The processing module is mainly used to store and run data information such as image processing algorithms, feature extraction algorithms and gesture databases, and the interaction module is connected to the display device 400 for communication. The interaction module can be a Bluetooth module, a WIFI module, etc., and this application does not limit this.

[0059] For example, the workflow of the gesture recognition module 800 is as follows: the user's hand image or video is acquired through a camera. The acquired image or video is preprocessed using an algorithm, such as denoising, image enhancement, etc., to improve the accuracy and effect of subsequent processing. The hand area in the image is located and extracted using image processing algorithms, such as skin color detection, edge detection, etc. The hand area is segmented from the entire image to remove background interference. Key features, such as the position of the fingers, the shape of the palm, etc., are extracted from the hand area using feature extraction algorithms, such as shape analysis, contour extraction, etc. The extracted features are passed to a classifier, such as a support vector machine (SVM), a decision tree, a neural network, etc., to classify and recognize gestures. The classifier can be trained based on a previously established gesture database so that it can match new gestures with known gestures. Based on the recognition result, the interaction module transmits a signal to the display device 400, thereby triggering the display device 400 to perform corresponding operations or commands, such as play, pause, confirm, return, etc.

[0060] Please also read Figure 3 , Figure 7 and Figure 8 The box body 100 assembly includes a surrounding frame 110 with an opening and a panel assembly 120, a receiving cavity 150 is provided in the surrounding frame 110, the panel assembly 120 is connected to the surrounding frame 110 and covers part of the opening, the surrounding frame 110 and the panel assembly 120 enclose an opening 140, and a receiving groove 121 is provided on the panel assembly 120 and is spaced from the opening 140, and the gesture recognition module 800 is received in the receiving groove 121. Further, the panel assembly 120 is provided with an inner concave portion that is recessed toward the receiving cavity 150, so as to facilitate the formation of the receiving groove 121. It can be understood that the gesture recognition module 800 is embedded in the receiving groove 121, and the outer surface is flush with the surface of the panel assembly 120, so that the gesture recognition module 800 will not protrude from the surface of the box body 100 assembly, the appearance is more beautiful, and damage caused by collision and the like can be avoided.

[0061] The panel assembly 120 includes a mounting plate 122, a fixing plate 123 and a connecting portion 124. The mounting plate 122 is fixed to the frame 110 and is used to cover a part of the opening. An opening is provided on the mounting plate 122. One end of the connecting portion 124 is connected to the mounting plate 122, and the other end extends into the accommodating cavity 150. The fixing plate 123 is fixed to one end of the connecting portion 124 away from the mounting plate 122 and is located in the accommodating cavity 150. The gesture recognition module 800 is fixed to the fixing plate 123 through the opening. It can be understood that in order to improve the stability of the fixing plate 123 and the mounting plate 122, a plurality of connecting portions 124 can be provided and spaced between the fixing plate 123 and the mounting plate 122. Preferably, the connecting portion 124 is a rod-shaped or strip-shaped structure. Among them, the panel assembly 120 can be integrally formed with the mounting plate 122, the fixing plate 123 and the connecting portion 124 by stamping, hot pressing, injection molding and other processing methods. Of course, the mounting plate 122, the fixing plate 123 and the connecting portion 124 may be processed first, and then the panel assembly 120 may be formed by welding, and this application does not impose any limitation on this.

[0062] In some structural forms, the box body 100 assembly further includes a bottom plate 130, and the frame 110, the panel assembly 120 and the bottom plate 130 enclose a receiving cavity 150. The display device 400 and the retroreflective microprism array 320 can be fixed to the bottom plate 130 by a tool. Such an installation method is simple and the angle is easy to adjust. Of course, the display device 400 and the retroreflective microprism array 320 can be fixed to the side wall of the frame 110 by a tool, and the present application does not limit this.

[0063] In order to improve the heat dissipation effect of the frame 110, please refer to Figure 8 The frame 110 is provided with a plurality of heat dissipation holes 111, and the heat dissipation holes 111 communicate with the accommodating cavity 150 and the outside. Further, the heat dissipation holes 111 are provided in the region of the frame 110 close to the display device 400. It can be understood that the light source 510 on the display device 400 will also emit a large amount of heat during the light emission process. Thus, the heat dissipation holes 111 are provided close to the display device 400 to improve the heat dissipation effect of the display device 400. In some embodiments, a heat dissipation fan can also be provided to blow or suck air from the heat dissipation holes 111, thereby improving the efficiency of air circulation and further improving the heat dissipation effect.

[0064] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0065] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A suspension display device, characterized in that: It includes a box body and a controller, an optical component, and a display device arranged on the box body, wherein the display device includes a plurality of light sources, a plurality of light focusing elements, and a display panel; Among them, the focusing element is arranged in a one-to-one correspondence with the light source, the light source is used to emit illumination light under the electronic control of the controller, the focusing element is used to reflect the part of the illumination light whose outgoing direction is away from the display panel so as to be emitted toward the display panel, the illumination light passes through the display panel to form an image light emitted toward the optical component, and the image light is formed as a suspended image outside the box body under the action of the optical component.

2. The suspension display device according to claim 1, characterized in that: The light focusing element comprises an arc-shaped reflecting surface arranged toward the light source, and the arc-shaped reflecting surface is used for directing the portion of the illumination light whose outgoing direction is away from the display panel toward the display panel in the form of parallel light.

3. The suspension display device according to claim 2, characterized in that: The light focusing member is a metal cover, and the arc surface of the metal cover facing the light source is polished to form the arc-shaped reflecting surface; Alternatively, the focusing element comprises a base body with an arc-shaped structure, a reflective layer is attached, coated or plated on the arc surface of the base body facing the light source, and the reflective layer forms the arc-shaped reflective surface.

4. The suspension display device according to claim 1, characterized in that: It also includes a collimating lens, which is arranged between the light source and the display panel, and is used to collimate the illumination light emitted by the light source.

5. The suspension display device according to any one of claims 1 to 4, characterized in that: The controller controls each of the light sources to operate independently.

6. The suspension display device according to any one of claims 1 to 4, characterized in that: The optical assembly includes a beam splitter and a retroreflective microprism array; The box body is provided with a receiving cavity having an opening, the beam splitter cover is arranged at the opening, and the retroreflective microprism array and the display device are both arranged in the receiving cavity; The image light emitted by the display device is reflected by the beam splitter and then emitted to the retroreflective microprism array. The retroreflective microprism array receives the image light and reflects the image light to the beam splitter. The image light further passes through the beam splitter and forms the suspended image outside the box body.

7. The suspension display device according to claim 6, characterized in that: The beam splitter is a polarization beam splitter; The optical component further comprises a quarter-wavelength phase modulation device, which is located between the polarization beam splitter and the retroreflective microprism array and is parallel to the retroreflective microprism array.

8. The suspension display device according to claim 6, characterized in that: It also includes a gesture recognition module, which is arranged on the box body and connected to the controller, and the gesture recognition module is spaced apart from the opening.

9. The suspension display device according to claim 8, characterized in that: The box body includes a frame with an opening and a panel assembly, the accommodating cavity is arranged in the frame, the panel assembly is connected to the frame and covers part of the opening, the frame and the panel assembly enclose the opening, the panel assembly is provided with a receiving groove spaced apart from the opening, and the gesture recognition module is accommodated in the receiving groove.

10. The suspension display device according to claim 9, characterized in that: The surrounding frame is provided with a plurality of heat dissipation holes, and the heat dissipation holes are connected with the accommodating cavity and the outside.

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