A wide-viewing-angle levitation display device based on visual persistence

Abstract

This invention discloses a wide-viewing-angle suspended display device based on visual persistence, relating to the field of optical imaging equipment technology. The device includes: a housing, a display, an imaging lens assembly, a high-speed rotation mechanism, and a control system. The display and imaging lens assembly are housed within the housing. The display emits image light, and the imaging lens assembly receives and reflects the image light, forming a suspended light and shadow effect in the air outside the housing. The high-speed rotation mechanism drives the housing to rotate at high speed, utilizing the visual persistence effect to create a continuous visual effect of the suspended light and shadow within a 360° range. The imaging lens assembly includes a first and a second optical waveguide array orthogonally arranged, with light rays forming equidistant images at symmetrical positions after two orthogonal reflections. The high-speed rotation mechanism is equipped with shock-absorbing rubber pads to reduce vibration. This invention achieves a wide-viewing-angle suspended display by driving the housing to rotate through a high-speed rotation mechanism, utilizing the visual persistence effect to allow viewers to see a continuous suspended light and shadow effect within a 360° range. It has the advantages of simple structure and a good viewing experience. It can be widely used in exhibitions, advertising, cultural tourism, and entertainment fields.

Description

Technical Field

[0001] This utility model relates to the field of optical imaging equipment technology, and in particular to a wide-viewing-angle suspended display device based on visual persistence. Background Technology

[0002] The persistence of vision, also known as the afterglow effect, was first proposed in 1824 by Peter Mark Rogers, a professor at the University of London, in his research report "Persistence of Vision over Moving Objects." When the human eye observes an object, the light signal is transmitted to the brain, and after a short period of time, the visual image does not immediately disappear. This residual visual image is called an "afterimage," and this phenomenon is called "persistence of vision." This residual visual image usually lingers in the human brain for 0.1-0.4 seconds.

[0003] Taking advantage of the visual persistence effect, many shops, scenic spots and other places have designed or purchased a device. The general structure of the device is similar to that of US Patent US20230018982A1. By rotating LED light strips at high speed, a disc-shaped image can be formed on its emitting side. The image can display time, text and even video to attract customers and tourists. At present, this technology is widely used in exhibitions, aviation, cultural tourism and other fields.

[0004] As is well known, medium-free aerial imaging technology involves projecting image light emitted by a display device onto an imaging lens assembly, where it is then refocused in mid-air on the other side of the assembly to form a floating real image. Aerial imaging technology creates images in the air, allowing people to see them without the need for auxiliary equipment such as VR glasses, providing a powerful visual impact.

[0005] However, existing medium-free aerial imaging technologies have a narrow field of view. The human eye can only see the floating image within a range of ±30° directly in front of it. When the human eye's field of view exceeds this range, the floating image cannot be seen. Summary of the Invention

[0006] This invention provides a wide-viewing-angle floating display device based on visual persistence, which utilizes the visual persistence effect to allow people to see floating light and shadow within multiple viewing angles.

[0007] This invention provides a wide-viewing-angle levitation display device based on visual persistence, comprising: a housing, a display, an imaging lens assembly, a high-speed rotation mechanism, and a control system. The display and the imaging lens assembly are disposed within the housing. The display emits image light, and the imaging lens assembly receives the image light and reflects it to form a levitation light and shadow in the air outside the housing. The high-speed rotation mechanism is disposed adjacent to the housing and drives the housing to rotate at high speed to utilize the visual persistence effect, so that the levitation light and shadow forms a continuous visual effect within a 360° range. The control system controls at least the rotational speed of the high-speed rotation mechanism.

[0008] According to the present invention, a wide-viewing-angle floating display device based on visual persistence is provided, which further includes a housing, wherein the high-speed rotating mechanism and the housing are disposed inside the housing, and the high-speed rotating mechanism is located at the bottom of the housing.

[0009] According to the present invention, a wide-viewing-angle suspended display device based on visual persistence is provided, wherein the housing has a cavity inside and an opening is formed at the top; the imaging lens assembly is installed in the opening, the display is installed below the imaging lens assembly, and the image emitted by the display is imaged in the air above the housing by the imaging lens assembly.

[0010] According to the present invention, a wide-viewing-angle floating display device based on visual persistence is provided, wherein the high-speed rotation mechanism includes a driving component, the driving component including a driving motor and a transmission component, the transmission component being connected to the housing; and a shock-absorbing rubber pad is provided between the driving component and the housing.

[0011] According to the present invention, a wide-viewing-angle floating display device based on visual persistence is provided, wherein the imaging lens assembly includes: a first optical waveguide array; a second optical waveguide array, wherein the second optical waveguide array is stacked with the first optical waveguide array, and the second optical waveguide array is orthogonally arranged with the first optical waveguide array.

[0012] According to the present invention, a wide-viewing-angle floating display device based on visual persistence is provided. The first optical waveguide array includes a plurality of first optical waveguides, and each first optical waveguide has a first reflective surface on one side. The second optical waveguide array includes a plurality of second optical waveguides, and each second optical waveguide has a second reflective surface on one side. The first reflective surface and the second reflective surface are arranged perpendicularly. The light-emitting end of each light channel faces at least one second reflective surface so that the image light can be incident on the second reflective surface.

[0013] According to the present invention, a wide-viewing-angle floating display device based on visual persistence is provided, wherein the imaging lens assembly is one of a microlens array, a Fresnel lens group, a strip reflector, or a dihedral reflector.

[0014] According to the present invention, a wide-viewing-angle suspended display device based on visual persistence is provided, wherein the display is one of LCD, LED, OLED, LCOS, DLP or projector.

[0015] According to the present invention, a wide-viewing-angle floating display device based on visual persistence is provided, which further includes a voice interaction system and a gesture recognition system, wherein the voice interaction system and the gesture recognition system are used for people to interact with the floating light and shadow.

[0016] The wide-viewing-angle floating display device based on visual persistence provided by this utility model drives the shell to rotate at high speed through a high-speed rotating mechanism, so that the floating light and shadow above the shell also rotates at high speed. By utilizing the visual persistence effect, people can see a continuous floating light and shadow effect within a 360-degree range, providing the best viewing experience. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the wide-viewing-angle floating display device based on visual persistence provided by this utility model.

[0019] Figure 2 yes Figure 1 The diagram shows the structure of the imaging lens assembly.

[0020] Figure 3 yes Figure 1 The diagram shows the imaging principle of the imaging lens assembly.

[0021] Explanation of reference numerals in the attached figures: 10: Imaging lens assembly; 11: First optical waveguide; 12: Second optical waveguide; 111: First reflecting surface; 121: Second reflecting surface; 30: Display; 40: Housing; 50: High-speed rotating mechanism; 60: Outer shell; 70: Transmission component; 100: Suspended light and shadow. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] The following is combined Figures 1-3 This invention describes a wide-viewing-angle suspended display device based on visual persistence.

[0024] like Figure 1 As shown in the embodiment of this utility model, the wide-viewing-angle suspended display device based on visual persistence includes: a housing 40, a display 30, an imaging lens assembly 10, a high-speed rotation mechanism 50, and a control system. The housing 40 houses the display 30 and the imaging lens assembly 10. The display 30 is used to emit image light, and the imaging lens assembly 10 is used to receive the image light and reflect it before emitting it. The high-speed rotation mechanism 50 is disposed adjacent to the housing 40 and is used to drive the housing 40 to rotate at high speed. The control system controls at least the housing 40 and the high-speed rotation mechanism 50.

[0025] Specifically, the image light emitted by the display 30 enters the imaging lens assembly 10. After being reflected twice in the imaging lens assembly 10, the image light is refocused in the air on the other side of the imaging lens assembly 10 to form the suspended light and shadow 100. In this embodiment, a housing 60 is also included. A high-speed rotating mechanism 50 and a housing 40 are disposed inside the housing 60. The high-speed rotating mechanism 50 is located at the bottom of the housing 40 and is connected to the housing 40 through a transmission member 70.

[0026] Furthermore, in this embodiment of the invention, the housing 40 has an internal cavity and an opening at the top. An imaging lens assembly 10 is mounted in the opening, and a display 30 is fixedly mounted below the imaging lens assembly 10. The display 30 and the imaging lens assembly 10 are positioned at a 45-degree angle. The image emitted by the display 30 is imaged in mid-air by the imaging lens assembly 10 and projected onto the housing 40, forming a suspended light and shadow 100. The interior of the housing 40 is a closed space providing spatial protection. Internal heat dissipation components and other components are arranged functionally; this is conventional technology and will not be further explained.

[0027] Furthermore, in a further embodiment of this utility model, the high-speed rotation mechanism 50 is located at the bottom of the housing 40, and uses a high-precision brushless DC motor as the power source. The output shaft of the motor is connected to the housing through a coupling transmission component 70, which can drive the housing to rotate at high speed (≥1000 rpm). The high-speed rotation mechanism also includes a stable support base for fixing the motor. The support base is provided with shock-absorbing rubber pads to reduce the transmission of vibrations generated when the motor rotates to other parts of the device.

[0028] Furthermore, the control system includes a main control chip, a sensor module, a drive module, and a communication module. The main control chip uses a high-performance ARM processor and is responsible for the control and data processing of the entire device; the sensor module includes a gyroscope sensor and an accelerometer sensor, used to detect the rotation angle and acceleration information of the housing in real time; the drive module includes multiple motor drivers, each used to drive the motors of the high-speed rotating mechanism; the communication module adopts Bluetooth and Wi-Fi dual-mode communication, enabling data transmission and control command reception with external devices.

[0029] Furthermore, the working principle is as follows: The main control chip acquires the motion status information of the housing 40 in real time through the sensor module, calculates the optimal rotation speed of the housing 40 according to the preset program and algorithm, and then controls the brushless DC motor to adjust the housing 40 through the drive module. At the same time, the main control chip can also receive control commands sent by external devices through the communication module to adjust the device's working mode, display content, etc.

[0030] Furthermore, the connection relationships are as follows: the main control chip is connected to the sensor module, drive module, and communication module through wiring on the circuit board; the sensor module is directly mounted on the housing to sense the movement status of the housing in real time; the drive module is connected to the motor of the high-speed rotating mechanism through a cable; and the communication module communicates wirelessly with external devices through an antenna.

[0031] Optionally, in embodiments of this utility model, the wide-viewing-angle suspended display device based on visual persistence can be any one of frontal viewing, top-down viewing, side viewing, upward viewing, and ground-level viewing.

[0032] Furthermore, in embodiments of this utility model, the display 30 and the imaging lens assembly 10 may be arranged at an angle or stacked together.

[0033] like Figure 2 As shown, in one embodiment of this utility model, the imaging lens assembly 10 includes: a first optical waveguide array and a second optical waveguide array. The second optical waveguide array is stacked with the first optical waveguide array, and the second optical waveguide array is orthogonally arranged with the first optical waveguide array.

[0034] Specifically, the imaging lens assembly 10 includes two layers of optical waveguide arrays, which are orthogonally arranged, wherein the second optical waveguide array is superimposed on the first optical waveguide array. Image light rays are incident on the second optical waveguide array, reflected by the second optical waveguide array to the first optical waveguide array, and then reflected by the first optical waveguide array into the air, forming a suspended light and shadow 100.

[0035] Furthermore, the first optical waveguide array includes a plurality of first optical waveguides 11, and a first reflective surface 111 is provided on one side of each first optical waveguide 11. The second optical waveguide array includes a plurality of second optical waveguides 12, and a second reflective surface 121 is provided on one side of each second optical waveguide 12, the second reflective surface 121 being perpendicular to the first reflective surface 111.

[0036] like Figure 3 As shown, the first and second optical waveguide arrays are orthogonal, performing orthogonal decomposition on any optical signal. The original signal is decomposed into two mutually orthogonal signals, X and Y. Signal X is reflected at the second reflecting surface 121 at the same angle of incidence as the first physical layer. At this time, signal Y remains parallel to the first physical layer, passes through the first physical layer, and is reflected at the first reflecting surface 111 at the same angle of incidence as the second physical layer. The reflected optical signal composed of signal Y and signal X is mirror-symmetrical with the original optical signal. Therefore, light rays from any direction can achieve mirror symmetry after passing through the second and first optical waveguide arrays. The divergent light from any light source will be refocused at a symmetrical position after passing through the imaging lens assembly 10. The imaging distance is the same as the distance between the holographic reflective layer and the light source, resulting in equidistant imaging. Moreover, the image is located in the air, requiring no specific carrier, directly presenting the real image in the air. The image in space seen by the user is the light emitted by the actual object.

[0037] Furthermore, in this embodiment, the display 30 can be one of LCD, LED, OLED, LCOS, DLP, or a projector.

[0038] Optionally, in embodiments of this invention, the imaging lens assembly 10 can be any one of a microlens array, a Fresnel lens group, a strip reflector, or a dihedral reflector.

[0039] In an embodiment of this utility model, the display device is further provided with a voice interaction system and a gesture recognition system, which are used for people to interact with the suspended light and shadow 100.

[0040] Specifically, in this embodiment, the levitating light and shadow 100 is a vehicle-mounted virtual assistant. This virtual assistant has a voice broadcast function, capable of broadcasting weather conditions, road conditions, etc. Users can interact with the virtual assistant through a voice interaction system, allowing it to execute commands. Users can also interact with the virtual assistant through a gesture recognition system. Different gestures can drive the virtual assistant to perform different actions; for example, rotating a finger can make the virtual assistant spin; moving a finger forward or backward can make the virtual assistant move forward or backward.

[0041] It should be noted that during high-speed rotation, synchronizing the display's flicker with the rotation angle through a control system can further improve the clarity and continuity of the suspended light and shadow. This synchronized flicker control is common knowledge in the field and has been widely used in products such as LED fan displays.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A wide-viewing-angle levitation display device based on visual persistence, characterized in that, include: Housing, display, imaging lens assembly, high-speed rotating mechanism and control system, The housing contains a display and an imaging lens assembly. The display emits image light, and the imaging lens assembly receives the image light and reflects it to form a suspended light and shadow in the air outside the housing. The high-speed rotation mechanism is disposed adjacent to the housing and is used to drive the housing to rotate at high speed, so as to utilize the persistence of vision effect to make the suspended light and shadow form a continuous visual effect within a 360° range. The control system controls at least the rotational speed of the high-speed rotating mechanism.

2. The wide-viewing-angle levitation display device based on visual persistence according to claim 1, characterized in that, It also includes a housing, within which the high-speed rotating mechanism and the housing are disposed, with the high-speed rotating mechanism located at the bottom of the housing.

3. The wide-viewing-angle suspended display device based on visual persistence according to claim 1, characterized in that, The housing has an internal cavity and an opening at the top; the imaging lens assembly is mounted in the opening, the display is mounted below the imaging lens assembly, and the image emitted by the display is imaged in the air by the imaging lens assembly onto the top of the housing.

4. The wide-viewing-angle levitation display device based on visual persistence according to claim 1, characterized in that, The high-speed rotating mechanism includes a drive assembly, which includes a drive motor and a transmission component. The transmission component is connected to the housing. A shock-absorbing rubber pad is provided between the drive assembly and the housing.

5. The wide-viewing-angle levitation display device based on visual persistence according to claim 1, characterized in that, The imaging lens assembly includes: First optical waveguide array; The second optical waveguide array is stacked on top of the first optical waveguide array, and the second optical waveguide array is orthogonally arranged to the first optical waveguide array.

6. The wide-viewing-angle levitation display device based on visual persistence according to claim 5, characterized in that, The first optical waveguide array includes a plurality of first optical waveguides, and each first optical waveguide has a first reflective surface on one side; the second optical waveguide array includes a plurality of second optical waveguides, and each second optical waveguide has a second reflective surface on one side. The first reflective surface and the second reflective surface are arranged perpendicularly to each other so that the image light can be incident on the second reflective surface and the first reflective surface in sequence.

7. The wide-viewing-angle suspended display device based on visual persistence according to claim 1, characterized in that, The imaging lens assembly is one of a microlens array, a Fresnel lens group, a strip reflector, or a dihedral reflector.

8. The wide-viewing-angle levitation display device based on visual persistence according to claim 1, characterized in that, It also includes a voice interaction system and a gesture recognition system, which are used for people to interact with the floating light and shadow.

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