A naked-eye three-dimensional display device

Abstract

This application provides a naked-eye 3D display device, comprising: at least one pair of first and second optical elements; and a first and second reflectors. The at least one pair of first optical elements receives image light, which is then reflected by the first reflector after exiting the at least one pair of first optical elements. The reflected image light then passes through the second optical element and the second reflector before entering the human eye to form an image. The technical solution of this application addresses the technical challenges of a naked-eye display device that is integrated, portable, adjustable according to user needs, requires no special screen requirements, and is low-cost.

Description

Technical Field

[0001] The present application relates to the field of three-dimensional display technology, and in particular to a naked-eye three-dimensional display device. Background Art

[0002] Current display technologies can be broadly categorized into two types: flat-panel display technology and projection display technology. Flat-panel display technology typically uses each pixel on an LCD screen to emit light directly, allowing the eye to directly observe each pixel to obtain an image. Projection display technology uses a smaller, high-brightness image, passes through a converging lens to form a magnified real image, which is then projected onto a screen for diffuse reflection. The image is then observed by the human eye. Because the screen is diffusely reflective, existing projection display technology is suitable for multiple people to view the same content, but a large amount of light is wasted. Another type of display technology, such as retinal scan display technology, projects directly onto the human eye, but these methods currently require a screen to be placed close to each eye.

[0003] 3D display technology can realistically reproduce three-dimensional scenes by providing different parallax images to the human eye, thus creating a sense of stereoscopic vision. Currently, 3D display technology can be divided into those that require special glasses and those that can be viewed directly with the naked eye. Regardless of whether special glasses are required or the naked eye is used, the basic principle is that different images are projected onto the left and right eyes, creating a visual depth difference. The brain then processes and superimposes this information to create a three-dimensional image.

[0004] Most of the current mainstream 3D display technologies require specific screens. For example, shutter-type 3D display technology uses a screen with a refresh rate of at least 120 Hz. This is because the technology mainly relies on the difference between the two frames played on the screen, that is, one frame is projected to the right eye and the next frame is projected to the left eye, alternating in a cycle, thereby producing a 3D vision. Only when the screen refresh rate is higher than or equal to 120 Hz can the viewer feel that the video is smooth. Another type of polarized 3D display commonly used in cinemas has very high requirements for screen brightness, because after passing through the left and right lenses of specially selected polarized glasses, the light that is selectively transmitted will be greatly reduced. In addition, the current mainstream 3D display devices are relatively bulky, because they usually need to be integrated with special monitors, which are not convenient to carry and are relatively expensive.

[0005] The contents of the background technology section are merely technologies known to the public and do not necessarily represent the existing technologies in this field. Summary of the Invention

[0006] The present application aims to provide a naked-eye three-dimensional display device that solves the problems of low cost, portability, small size, adjustable angle according to user needs, and no special requirements for the screen.

[0007] According to one aspect of the present application, a naked-eye three-dimensional display device is proposed, comprising: at least one pair of first optical elements and second optical elements; a first reflector and a second reflector, wherein the at least one pair of first optical elements receives image light, and after being emitted from the at least one pair of first optical elements, the image light is reflected by the first reflector, and the reflected image light passes through the second optical element and the second reflector and enters the human eye to form an image.

[0008] According to some embodiments, the image light reflected by the first reflector enters the second optical element, and the image light emitted from the second optical element is reflected by the second reflector before entering the human eye to form an image.

[0009] According to some embodiments, the image light reflected by the first reflector is incident on the second reflector, and the image light reflected by the second reflector is incident on the human eye through the second optical element to form an image.

[0010] According to some embodiments, each pair of first optical elements comprises 2 converging lenses.

[0011] According to some embodiments, the second optical element comprises a Fresnel lens.

[0012] According to some embodiments, the naked-eye three-dimensional display device further includes: a first bracket, configured to be adjustable, for placing an image light source; a second bracket, configured to be movable, for setting the at least one pair of first optical elements; a third bracket, for fixing the first reflector and the second optical element, and the third bracket is movably connected to the second reflector at one end close to the second optical element.

[0013] According to some embodiments, parameters of the at least one pair of image light sources, the at least one pair of first optical elements, and the second reflector can be adjusted according to different viewing criteria.

[0014] According to some embodiments, the viewing indicators include viewing distance and viewing angle, the parameters of the at least one pair of first optical elements include size, focal length and position of the main axis, the parameters of the second reflector include size, angle, reflectivity, and the parameters of the at least one pair of image light sources include position relative to the at least one pair of first optical elements, focal length and size of the projected image.

[0015] According to some embodiments, the images of each pair of image light sources are displayed on the same screen or two screens, and each pair of image light sources is arranged opposite to the at least one pair of first optical elements.

[0016] According to some embodiments, the angle of the second reflector can be adjusted manually or electrically.

[0017] According to one aspect of the present application, a naked-eye three-dimensional display device is proposed, comprising: at least one pair of first optical elements and second optical elements; a first reflector and a second reflector, wherein the first reflector receives image light, and the reflected image light is incident on the at least one pair of first optical elements, and the image light emitted from the at least one pair of first optical elements is reflected by the second reflector and enters the human eye through the second optical element to form an image.

[0018] According to some embodiments, each pair of first optical elements comprises two converging lenses; and each of the second optical elements comprises a Fresnel lens.

[0019] According to some embodiments, the naked-eye three-dimensional display device further includes: a first bracket, configured to be adjustable, for placing an image light source; a second bracket, configured to be movable, for setting the at least one pair of first optical elements; a third bracket, for fixing the first reflector and the second optical element, and the third bracket is movably connected to the second reflector at one end close to the second optical element.

[0020] Based on the above-mentioned naked-eye three-dimensional display device, there are no specific requirements for the screen, which reduces costs, including but not limited to mobile phone screens or TV screens. This device does not require an integrated screen, and can be implemented with the user's own screen, such as any mobile phone screen, which improves portability and reduces costs. In addition, the angle of the reflector can be adjusted according to the position of the user's eyes, thereby changing the reflected light, making it more comfortable and convenient for the viewer. Moreover, convenient switching between two-dimensional and three-dimensional images can be achieved by simply changing the playback content of the image. Since the visible range is a cone, the image cannot be seen at other angles in theory, so this display technology has good privacy.

[0021] The above-mentioned Fresnel lens with adjustable parameters is used in conjunction with any screen. Light is reflected onto the lens through two reflectors, and the light path is adjusted to form a spatial loop, effectively utilizing the three-dimensional space, making the instrument a small footprint and a closed device that is convenient for observers to observe.

[0022] In order to achieve 2D / 3D switchable playback, the same image can be displayed on different parts of the screen in 2D.

[0023] To further understand the features and technical content of this application, please refer to the following detailed description and drawings of this application. However, this description and drawings are only used to illustrate this application and do not limit the scope of protection of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which constitute part of this disclosure, are intended to provide a further understanding of the disclosure. The illustrative embodiments of the disclosure and their descriptions are intended to explain the disclosure and do not constitute an improper limitation of the disclosure. In the accompanying drawings:

[0025] Figure 1 A top view of the structure of a naked-eye three-dimensional display device according to an exemplary embodiment of the present application is shown.

[0026] Figure 2 A schematic diagram showing the structure and optical path principle of a naked-eye three-dimensional display device according to an exemplary embodiment of the present application is shown.

[0027] Figure 3-5 A schematic structural diagram of a naked-eye three-dimensional display device according to an exemplary embodiment of the present application is shown.

[0028] Figure 6 A schematic diagram showing the optical path principle of a naked-eye three-dimensional display device according to an exemplary embodiment of the present application is shown.

[0029] Figure 7 A light path principle diagram illustrating the independent viewing characteristics of a naked-eye 3D display device according to an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0030] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the drawings represent like or similar parts, and thus repetitive description thereof will be omitted.

[0031] The described features, structures or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of these specific details, or other modes, components, materials, devices or the like may be employed. In these cases, well-known structures, methods, devices, implementations, materials or operations will not be shown or described in detail.

[0032] The flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, while others may be combined or partially combined. Therefore, the actual execution order may vary depending on the actual situation.

[0033] The terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish between different objects, not to describe a particular order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0034] The technical principles of this application are similar to those of three-dimensional display, but there are several differences: First, a display device with a high refresh rate is not required, an ordinary screen can be used; second, the angle is adjustable, making it easy for viewers to find the best viewing position. The technical solution of this application overcomes the shortcomings of the original technology. Although the independent display feature and high-quality images can only be achieved when the human eye is near a specific position, the reflective lens can be adjusted to match the user's eyes, making it more convenient. This feature can be independently controlled by using the image seen by each eye, and three-dimensional display can be achieved by projecting the three-dimensional image to the left and right eyes respectively. Conversely, ordinary two-dimensional display can be achieved by playing exactly the same image on different parts of the screen. The functions of the lens and reflector used can also be achieved by an off-axis Fresnel lens coated with a reflective film.

[0035] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings, and a naked-eye three-dimensional display device according to an embodiment of the present application is described in detail.

[0036] Figure 1 A top view of the structure of a naked-eye three-dimensional display device according to an exemplary embodiment of the present application is shown. Figure 2 A schematic diagram showing the structure and optical path principle of a naked-eye three-dimensional display device according to an exemplary embodiment of the present application is shown.

[0037] like Figure 1-2 As shown, according to an exemplary embodiment of the present application, the present application discloses a naked-eye three-dimensional display device including at least a pair of first optical elements 2 and 3 , a second optical element 4 , a first reflector 7 and a second reflector 8 .

[0038] The user provides at least one pair of image light sources 1 for projecting image light. The image light is received by at least one pair of first optical elements 2 and 3. After being emitted from the at least one pair of first optical elements 2 and 3, it is reflected by a first reflector 7. The reflected image light then passes through a second optical element 4 and a second reflector 8 before entering human eyes 5 and 6 to form an image.

[0039] Figure 3-5 A schematic structural diagram of a naked-eye three-dimensional display device according to an exemplary embodiment of the present application is shown.

[0040] According to an embodiment of the present application, the optical path structure of the naked-eye three-dimensional display device according to the present application can be divided into three routes to transmit image light to form an image in order to achieve the same imaging effect.

[0041] like Figure 3 As shown, the image light enters at least one pair of first optical elements 2 and 3, and after being emitted from the at least one pair of first optical elements 2 and 3, is reflected by the first reflector 7 and then enters the human eyes 5 and 6 in two situations. In the first situation, the image light reflected by the first reflector 7 enters the second optical element 4, and the image light emitted from the second optical element 4 is reflected by the second reflector 8 and then enters the human eyes 5 and 6 to form an image. Figure 4 As shown, in the second case, the image light reflected by the first reflector 7 is incident on the second reflector 8 , and the image light reflected by the second reflector 8 is incident on the human eyes 5 and 6 through the second optical element 4 to form an image.

[0042] like Figure 5 As shown, the third situation is that the first reflector 7 receives the image light, and the reflected image light is incident on the at least one pair of first optical elements 2, 3, and the image light emitted from the at least one pair of first optical elements 2, 3 is reflected by the second reflector 8 and then enters the human eye through the second optical element 4 to form an image.

[0043] According to an embodiment of the present application, the naked-eye three-dimensional display device further includes a first bracket 14 , a second bracket 13 and a third bracket 12 .

[0044] One end of the first bracket 14 , the second bracket 13 and the third bracket 12 are disposed on the platform plane 9 of the naked-eye 3D display device.

[0045] The first bracket 14 is configured to be adjustable and is used to position an image light source, which can be a screen that generates at least one pair of image light sources 1. The second bracket 13 is configured to be movable and is used to position at least one pair of first optical elements 2 and 3. The third bracket 12 is used to fix one end of the first reflector 7 and the second optical element 4. The other end of the first reflector 7 abuts the platform plane 9 of the 3D display device, and the end of the third bracket 12 near the second optical element 4 is movably connected to the second reflector 8.

[0046] According to an embodiment of the present application, the images from each pair of image light sources 1 are displayed on the same screen or on two screens, and each pair of image light sources 1 is disposed opposite at least one pair of first optical elements 2 and 3. To achieve switchable 2D / 3D playback, the same image can be displayed on different parts of the screen in 2D.

[0047] Each pair of first optical elements may use two converging lenses, each converging lens is arranged opposite to the imaging of an image light, and each image light is incident on the converging lens arranged opposite to it.

[0048] According to an embodiment of the present application, the second optical element 4 comprises a Fresnel lens. The angle of the second reflector can be adjusted manually or electrically. Based on the adjustable parameters of the Fresnel lens, when used in conjunction with any screen, light is reflected onto the lens via two reflectors, adjusting the optical path to form a spatial loop. This effectively utilizes three-dimensional space, resulting in a compact, enclosed device that is convenient for observers to observe.

[0049] According to an embodiment of the present application, parameters of at least one pair of image light sources 1 , at least one pair of first optical elements 2 , 3 , and the second reflector 8 can be adjusted according to different viewing indicators.

[0050] The viewing indicators include viewing distance and viewing angle, the parameters of at least one pair of first optical elements 2 and 3 include size, focal length and position of the main axis, the parameters of the second reflector 8 include size, angle, reflectivity, and the parameters of at least one pair of image light sources 1 include position relative to at least one pair of first optical elements 2 and 3, focal length and size of the projected image.

[0051] Figure 6 A schematic diagram showing the optical path principle of a naked-eye three-dimensional display device according to an exemplary embodiment of the present application is shown. Figure 7 A light path principle diagram illustrating the independent viewing characteristics of a naked-eye 3D display device according to an exemplary embodiment of the present application.

[0052] like Figure 6 As shown, for the sake of convenience, the imaging process on one side of a pair of image light sources 1 is first described, taking the image on the left side of the screen as an example. First, different three-dimensional stacked images of the left and right screens are input. For example, the left screen is image A at this time: adjust the focal length of the screen, and the emitted image light forms a real image A on the first reflector 7 after passing through at least a pair of first optical elements 2 and 3. After the image light continues to pass through the second optical element 4, an image, namely A, will be generated on the second reflector 8. At this time, the image light will be reflected by the second reflector 8. After entering the lens in the human eye 5 and 6, the image light will converge to produce a real image A. The same is true for the right side of the screen.

[0053] Independent imaging on the same screen is achieved by utilizing the different positions of the images projected on the left and right parts of the same screen, and the different convergence directions of the image light after passing through at least a pair of first optical elements 2 and 3. Figure 7 As shown, the principle is: if the left (or right) screen is approximated as a point light source, then the image light emitted by it will converge at a point (real image point) after passing through the lens. Therefore, the human eyes 5 and 6 can only receive the light of this point light source emitted by a part of the screen, so that the human eyes 5 and 6 here can only see one of the two virtual images 11.

[0054] In order to illustrate that any screen can be used, this application example uses a mobile phone screen commonly used in the market as an example to implement a pair of image light sources 1. Figure 3 .

[0055] Any brand of mobile phone screen can be used and placed at the screen position of the naked-eye three-dimensional display device. Based on the characteristics of the mobile phone screen, the distance between at least one pair of first optical elements 2 and 3 and the mobile phone screen is adjusted by moving the second bracket 13, and the second reflector 8 is adjusted to facilitate observation by the viewer. The second reflector 8 is for easy arrangement or integration into a closed and portable mobile phone three-dimensional display device.

[0056] The first bracket 14 of the naked-eye three-dimensional display device of the present application facilitates adjustment of the screen image. For example, during operation, the screen can be rotated to the side of the observer by rotating the first bracket 14 to facilitate image adjustment. After the adjustment is completed, it can be rotated back to the display working position.

[0057] The first reflector 7 and the second optical element 4 are fixedly arranged by the third bracket 12, and the end of the third bracket 12 close to the second optical element 4 utilizes the structure of the rotating shaft 10 to flexibly connect the second reflector 8 and rotate around the axis of the rotating shaft 10. After the first reflector 7 and the second optical element 4 in the present application are set in position according to the user's viewing indicators, they cannot be adjusted during viewing, otherwise it will affect the optical path. The angle of the reflector can be adjusted according to the position of the user's eyes 5 and 6, thereby changing the reflected light, making the viewer more comfortable and convenient. Moreover, convenient switching between two-dimensional and three-dimensional images only requires changing the playback content of the image. Since the visual range is a cone, the image cannot be seen at other angles in theory, so this display technology has good privacy.

[0058] Finally, it should be noted that the above descriptions are merely exemplary embodiments of the present disclosure and are not intended to limit the present disclosure. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure.

Claims

1. A naked-eye three-dimensional display device, characterized in that: include: at least one pair of a first optical element and a second optical element; A first reflector and a second reflector, wherein the at least one pair of first optical elements receives image light, and after being emitted from the at least one pair of first optical elements, the image light is reflected by the first reflector, and the image light reflected by the first reflector is incident on the second reflector, and the image light reflected by the second reflector is incident on the human eye through the second optical element to form an image, or the image light reflected by the first reflector passes through the second optical element and the second reflector and is incident on the human eye to form an image; Each pair of first optical elements includes two converging lenses; The second optical element includes a Fresnel lens; The naked-eye three-dimensional display device further includes: a first bracket, configured to be adjustable and used to place an image light source; a second bracket, configured to be movable, for setting the at least one pair of first optical elements; The third bracket is used to fix the first reflector and the second optical element, and one end of the third bracket close to the second optical element is movably connected to the second reflector.

2. The naked-eye 3D display device according to claim 1, wherein: The image light reflected by the first reflector enters the second optical element, and the image light emitted from the second optical element is reflected by the second reflector before entering the human eye to form an image.

3. The naked-eye 3D display device according to claim 1, wherein: The angle of the second reflector can be adjusted manually or electrically.

4. A naked-eye three-dimensional display device, characterized in that: include: at least one pair of a first optical element and a second optical element; a first reflector and a second reflector, wherein the first reflector receives image light, and the reflected image light is incident on the at least one pair of first optical elements, and the image light emitted from the at least one pair of first optical elements is reflected by the second reflector and then incident on the human eye through the second optical element to form an image; Each pair of first optical elements includes two converging lenses; The second optical element includes a Fresnel lens; The naked-eye three-dimensional display device further includes: a first bracket, configured to be adjustable and used to place an image light source; a second bracket, configured to be movable, for setting the at least one pair of first optical elements; The third bracket is used to fix the first reflector and the second optical element, and one end of the third bracket close to the second optical element is movably connected to the second reflector.

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