WO2022247001A1 - 一种裸眼三维显示装置 - Google Patents

一种裸眼三维显示装置 Download PDF

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Publication number
WO2022247001A1
WO2022247001A1 PCT/CN2021/108248 CN2021108248W WO2022247001A1 WO 2022247001 A1 WO2022247001 A1 WO 2022247001A1 CN 2021108248 W CN2021108248 W CN 2021108248W WO 2022247001 A1 WO2022247001 A1 WO 2022247001A1
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eye
image light
pair
naked
display device
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PCT/CN2021/108248
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English (en)
French (fr)
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丁阳
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北京计算科学研究中心
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Publication of WO2022247001A1 publication Critical patent/WO2022247001A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/34—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers
    • G02B30/35—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers using reflective optical elements in the optical path between the images and the observer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/34—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers
    • G02B30/36—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers using refractive optical elements, e.g. prisms, in the optical path between the images and the observer

Definitions

  • the present application relates to the technical field of three-dimensional display, in particular to a naked-eye three-dimensional display device.
  • display technologies can be mainly divided into two categories: flat panel display technology and projection display technology. It is common for flat-panel display technology to use each pixel of the liquid crystal screen to directly emit light, and the eyes directly observe each pixel to obtain an image.
  • the projection display technology uses a small high-brightness image, which is magnified by a converging lens and projected onto the screen for diffuse reflection, and then the human eye observes the screen to see the image. Due to the diffuse reflection of the screen, the existing projection display technology is suitable for many people to watch the same content, but a lot of light is wasted.
  • 3D display technology is a display technology that can realize the true reproduction of stereoscopic scenes, which can provide different parallax images for human eyes, so that people can produce stereoscopic vision.
  • 3D display technology can be divided into 3D display technology that needs to wear specific glasses, and 3D display technology that directly watches with naked eyes. Regardless of whether you need to wear specific glasses or watch directly with the naked eye, the basic principle is that the images projected on the left and right eyes are different, resulting in a difference in visual depth. After processing by the brain, the information is superimposed to form a three-dimensional image.
  • shutter-type 3D display technology using a screen with a screen refresh rate of at least 120hz. Because this technology mainly relies on the difference between the two frames before and after the screen playback, that is, at this time, one frame is projected to the right eye, and the next frame is projected to the left eye, alternating cycles, thereby generating three-dimensional vision. Only when the screen refresh rate is higher than or equal to 120Hz can the viewer feel the video is smooth.
  • Another kind of polarized three-dimensional display commonly used in movie theaters requires very high screen brightness, because after passing through the left and right lenses of specially selected polarized glasses, the light selectively transmitted will be much reduced.
  • the current mainstream three-dimensional display devices are relatively bulky, because they usually need to integrate a special display, which is inconvenient to carry and expensive.
  • the purpose of this application is to provide a naked-eye three-dimensional display device, which solves the problems of low cost, portability, small size, adjustable angle according to user needs, and no special requirements for the screen.
  • a naked-eye three-dimensional display device including: at least a pair of first optical elements and second optical elements; a first mirror and a second mirror, and the at least one pair of first optical elements receive After the image light is emitted from the at least one pair of first optical elements, it 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 for imaging .
  • the image light reflected by the first mirror enters the second optical element, and the image light emitted from the second optical element is reflected by the second mirror and enters the human eye for imaging. .
  • the image light reflected by the first mirror enters the second mirror, and the image light reflected by the second mirror enters the human eye through the second optical element for imaging.
  • each pair of first optical elements comprises 2 converging lenses.
  • the second optical element comprises a Fresnel lens.
  • 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 A component; a third bracket, 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.
  • the 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 indexes.
  • the viewing index includes viewing distance and viewing angle
  • the parameters of the at least one pair of first optical elements include size, focal length, and the position of the main axis
  • the parameters of the second mirror include size, angle, reflection
  • the parameters of the at least one pair of image light sources include the position relative to the at least one pair of first optical elements, the focal length and the size of the projected image.
  • each pair of image light sources are displayed on the same screen or on two screens, and each pair of image light sources is arranged opposite to the at least one pair of first optical elements.
  • the angle of the second reflector can be adjusted manually or electrically.
  • a naked-eye three-dimensional display device including: at least a pair of first optical elements and second optical elements; a first reflector and a second reflector, the first reflector receives image light, The reflected image light enters 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 mirror and passes through the second optical element Imaging into the human eye.
  • each pair of first optical elements comprises 2 converging lenses; said second optical elements comprise Fresnel lenses.
  • 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 A component; a third bracket, 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.
  • the naked-eye three-dimensional display device there is no specific requirement for screens, which reduces costs, including but not limited to mobile phone screens or TV screens.
  • the device does not need an integrated screen, and the user's own screen can be realized, such as any mobile phone screen, which improves portability and reduces cost.
  • the angle of the reflector can be adjusted to change the reflected light, making the viewer more comfortable and convenient.
  • the convenient two-dimensional/three-dimensional image switching can be realized only by changing the playing content of the image. Since the viewing range is a cone, the image cannot be seen from other angles theoretically, so this display technology has good privacy.
  • Fresnel lens with adjustable parameters can be used with any screen, and the light is reflected to the lens through two mirrors, and the light path is adjusted to form a spatial loop, effectively using the three-dimensional space, making the instrument occupy an area A small, enclosed device that is convenient for the observer to observe.
  • FIG. 1 shows a structural top view of a naked-eye three-dimensional display device according to an exemplary embodiment of the present application.
  • Fig. 2 shows a schematic diagram of the structure and principle of an optical path of a naked-eye three-dimensional display device according to an exemplary embodiment of the present application.
  • 3-5 are schematic structural diagrams of a naked-eye three-dimensional display device according to an exemplary embodiment of the present application.
  • Fig. 6 shows a schematic diagram of the principle of an optical path of a naked-eye three-dimensional display device according to an exemplary embodiment of the present application.
  • FIG. 7 shows a schematic diagram of an optical path of independent viewing characteristics of a naked-eye three-dimensional display device according to an exemplary embodiment of the present application.
  • Example embodiments will now be described more fully with reference to the accompanying drawings.
  • Example embodiments may, however, 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 application will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
  • the same reference numerals denote the same or similar parts in the drawings, and thus their repeated descriptions will be omitted.
  • This application is similar to the technical principle of 3D display, but there are several differences: 1. It does not need a display device with a high refresh rate, but an ordinary screen; 2. The angle can be adjusted to facilitate the viewer to find the best viewing position.
  • the technical solution of the present application overcomes the shortcomings of the prior art. Although the feature of independent display and high-quality images can only be achieved when the human eye is near a specific position, the position can be adjusted to match the user's eyes by adjusting the reflector. more convenient. Using the feature that the images seen by each eye can be independently controlled, three-dimensional display can be realized by projecting three-dimensional images to the left and right eyes respectively. On the contrary, for different parts of the screen, the same image can be played to achieve ordinary two-dimensional display.
  • the functions of the used lens and mirror can also be realized by a piece of off-axis Fresnel lens coated with reflective film.
  • FIG. 1 shows a structural top view of a naked-eye three-dimensional display device according to an exemplary embodiment of the present application.
  • Fig. 2 shows a schematic diagram of the structure and principle of an optical path of a naked-eye three-dimensional display device according to an exemplary embodiment of the present application.
  • the present application discloses a naked-eye three-dimensional display device comprising at least a pair of first optical elements 2, 3, a second optical element 4, a first mirror 7 and a second Mirror 8.
  • the user provides at least one pair of image light sources 1 for projecting image light.
  • At least one pair of first optical elements 2, 3 receives the image light, after being emitted from at least one pair of first optical elements 2, 3, it is reflected by the first mirror 7, and the reflected image light passes through the second optical element 4 and the second Reflector 8 shoots into human eyes 5 and 6 for imaging.
  • 3-5 are schematic structural diagrams of a naked-eye three-dimensional display device according to an exemplary embodiment of the present application.
  • the optical path structure of the naked-eye three-dimensional display device according to the present application to achieve the same imaging effect can be divided into three routes to transmit image light for imaging.
  • the image light is incident on at least one pair of first optical elements 2, 3, after being emitted from at least one pair of first optical elements 2, 3, after being reflected by the first reflector 7, it enters the human body in two situations. Eye 5,6.
  • the first case is that 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 enters the human eyes 5 and 6 for imaging.
  • the second case is that the image light reflected by the first reflector 7 enters the second reflector 8, and the image light reflected by the second reflector 8 enters the human eye 5 through the second optical element 4 , 6 imaging.
  • the third case 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, from the at least one pair of first optical elements 2, 3
  • the image light emitted by one of the optical elements 2 and 3 is reflected by the second mirror 8 and then enters the human eye through the second optical element 4 for imaging.
  • the naked-eye three-dimensional display device further includes a first bracket 14 , a second bracket 13 and a third bracket 12 .
  • One ends of the first bracket 14 , the second bracket 13 and the third bracket 12 are arranged on the platform plane 9 of the naked-eye three-dimensional display device.
  • the first support 14 is configured to be adjustable, and is used to place the image light source, which may be a screen for generating at least one pair of image light sources 1 .
  • the second bracket 13 is configured to be movable for setting at least one pair of first optical elements 2 , 3 .
  • the third bracket 12 is used to fix one end of the first mirror 7 and the second optical element 4, the other end of the first mirror 7 abuts on the platform plane 9 of the three-dimensional display device, and the third bracket 12 is close to the second optical element 4.
  • One end of the element 4 is movably connected with the second mirror 8 .
  • 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 arranged opposite to at least one pair of first optical elements 2 , 3 .
  • 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 enters the converging lens opposite to it.
  • the second optical element 4 includes a Fresnel lens.
  • the angle of the second mirror can be adjusted manually or electrically. Based on the Fresnel lens with adjustable parameters, with any screen, the light is reflected to the lens through two reflectors, and the optical path is adjusted to form a spatial loop, effectively using the three-dimensional space, making the instrument occupy an area A small, enclosed device that is convenient for the observer to observe.
  • parameters of at least one pair of image light sources 1 , at least one pair of first optical elements 2 , 3 and second reflector 8 can be adjusted according to different viewing indexes.
  • the viewing index includes viewing distance and viewing angle
  • the parameters of at least one pair of first optical elements 2, 3 include size, focal length and the position of the main axis
  • the parameters of the second reflector 8 include size, angle, reflectivity
  • the parameters of 1 include the position relative to at least one pair of first optical elements 2, 3, the focal length and the size of the projected image.
  • FIG. 6 shows a schematic diagram of the principle of an optical path of a naked-eye three-dimensional display device according to an exemplary embodiment of the present application.
  • FIG. 7 shows a schematic diagram of an optical path of independent viewing characteristics of a naked-eye three-dimensional display device according to an exemplary embodiment of the present application.
  • the imaging process of one side of a pair of image light sources 1 is described first, taking the image on the left side of the screen as an example.
  • the left and right measurement screens are input with different three-dimensional stacked images.
  • the left measurement screen is like A at this time: adjust the focal length of the screen, and the image light emitted passes through at least a pair of first optical elements 2 and 3 and then passes through the first reflector. 7 to form a real image A.
  • an image, namely A will be generated on the second reflector 8 , and the image light is reflected by the second reflector 8 at this time.
  • the image light enters the lens in the human eye 5 and 6, it will converge to produce a real image A. The same goes for the right side of the screen.
  • the independent imaging of the same screen is realized by using the different positions of projected images on the left and right parts of the same screen, and after passing through at least one pair of first optical elements 2 and 3, the convergent directions of the image light rays are different.
  • the principle is: if the left (or right) screen is approximated as a point light source, the image light emitted by it will converge on a point (real image point) after passing through the lens, so the human eye 5 , 6 can only receive the light of this light source emitted by a part of the screen, so that the human eyes 5, 6 here can only see one of the two virtual images 11 .
  • the example of this application uses a mobile phone screen commonly used in the market as the implementation of a pair of image light sources 1 to illustrate the example, see FIG. 3 .
  • the mobile phone screen can be arranged 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, 3 and the mobile phone screen can be adjusted by moving the second bracket 13 , and adjust the second reflector 8 to facilitate observation by the viewer.
  • the second reflector 8 is for convenient arrangement or integration into a closed and portable three-dimensional display device for mobile phones.
  • the first bracket 14 of the naked-eye three-dimensional display device of the present application is convenient for adjusting the screen image. display the working position.
  • the first reflector 7 and the second optical element 4 are fixedly arranged by the third support 12, and the structure of the second reflector 8 is flexibly connected to the second reflector 8 by the structure of the rotating shaft 10 near the end of the third support 12 near the second optical element 4.
  • the shaft center of the rotating shaft 10 rotates.

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Abstract

一种裸眼三维显示装置，包括：至少一对第一光学元件(2,3)和第二光学元件(4)；第一反射镜(7)和第二反射镜(8)，至少一对第一光学元件(2,3)接收图像光，从至少一对第一光学元件(2,3)射出后，经第一反射镜(7)反射，反射后的图像光经过第二光学元件(4)和第二反射镜(8)，射入人眼(5,6)成像。解决了裸眼显示装置一体化、便携、可根据用户需求调节角度、对屏幕没有特殊要求，低成本等的技术问题。

Description

一种裸眼三维显示装置 技术领域
本申请涉及三维显示技术领域，具体涉及一种裸眼三维显示装置。
背景技术
目前显示技术主要可以分为两类：平板式显示技术和投影式显示技术。平板式显示技术常见的是用液晶屏各象素点直接发光，由眼睛直接观察各象素点得到图像。投影式显示技术用较小的高亮度图像，经过会聚镜头成放大的实像，投射到屏幕上进行漫反射，然后由人眼观察屏幕看到图像。由于屏幕为漫反射，现有的投影显示技术适合于多人观看同样的内容，但大量的光被浪费。另外还有一类直接投影到人眼的显示技术，如视网膜扫描显示(Retinal Scan Display)技术，但这类方法目前都需要在每只眼睛近前放置一块屏。
3D显示技术可以实现立体场景真实再现的一种显示技术，其可以为人眼分别提供不同的视差图像，从而使人产生立体视觉。目前三维显示技术，可分为需要佩戴特定眼镜的三维显示技术，和直接裸眼观看的三维显示技术。不管需要佩戴特定眼镜还是直接裸眼观看，基本的原理都是投射在左右眼睛的图像不同，从而造成视觉深度差，大脑处理后进行信息叠加，形成一个具有三维效果的影像。
目前主流的三维显示技术，大都需要特定的屏幕。比如：快门式三维显示技术，使用屏幕刷新率至少120hz的屏幕。因为该技术主要依赖屏幕播放的前后二帧的差别，即此时一帧投射到右眼，下一帧投射到左眼，交替循环，从而产生三维视觉。屏幕刷新率高于或者等于120Hz的情况下，才能让观看者感觉视频流畅。另一种电影院常用的偏光式三维显示对屏幕亮度要求非常高，因为通过特殊选择的偏振光的眼镜的左右镜片后，被选择性透过的光线会降低很多。而且目前主流的三维显示设备都比较笨重，因为通常需要集成特殊的显示器，不方便携带，价格较 贵。
背景技术部分的内容仅仅是公开人所知晓的技术，并不当然代表本领域的现有技术。
发明内容
本申请旨在提供一种裸眼三维显示装置，解决了低成本、便携式、体积小、可根据用户需求调节角度、对屏幕没有特殊要求的问题。
根据本申请的一方面，提出一种裸眼三维显示装置，包括：至少一对第一光学元件和第二光学元件；第一反射镜和第二反射镜，所述至少一对第一光学元件接收图像光，从所述至少一对第一光学元件射出后，经所述第一反射镜反射，反射后的图像光经过所述第二光学元件和所述第二反射镜，射入人眼成像。
根据一些实施例，所述第一反射镜反射后的图像光入射所述第二光学元件，从所述第二光学元件射出的图像光经所述第二反射镜反射后，射入人眼成像。
根据一些实施例，所述第一反射镜反射后的图像光入射所述第二反射镜，所述第二反射镜反射后的图像光经所述第二光学元件射入人眼成像。
根据一些实施例，每对第一光学元件包括2个会聚透镜。
根据一些实施例，所述第二光学元件包括菲涅尔透镜。
根据一些实施例，所述的裸眼三维显示装置还包括：第一支架，配置为可调节，用于放置图像光源；第二支架，配置为可移动，用于设置所述至少一对第一光学元件；第三支架，用于固定所述第一反射镜和所述第二光学元件，且所述第三支架靠近所述第二光学元件的一端活动连接所述第二反射镜。
根据一些实施例，所述至少一对图像光源、所述至少一对第一光学元件和第二反射镜的参数能够依据不同的观看指标进行调整。
根据一些实施例，所述观看指标包括观看距离和观看角度，所述至 少一对第一光学元件的参数包括大小、焦距和主轴的位置，所述第二反射镜的参数包括大小、角度、反射率，所述至少一对图像光源的参数包括相对至少一对第一光学元件的位置、焦距和投出的图像的大小。
根据一些实施例，每对图像光源的成像显示于同一屏幕或两个屏幕上，每对图像光源与所述至少一对第一光学元件相对设置。
根据一些实施例，所述第二反光镜的角度能够手动或电动调节。
根据本申请的一方面，提出一种裸眼三维显示装置,包括：至少一对第一光学元件和第二光学元件；第一反射镜和第二反射镜，所述第一反射镜接收图像光，经反射后的图像光入射所述至少一对第一光学元件，从所述至少一对第一光学元件射出的图像光经所述第二反射镜反射后的图像光经所述第二光学元件射入人眼成像。
根据一些实施例，每对第一光学元件包括2个会聚透镜；所述第二光学元件包括菲涅尔透镜。
根据一些实施例，所述的裸眼三维显示装置还包括：第一支架，配置为可调节，用于放置图像光源；第二支架，配置为可移动，用于设置所述至少一对第一光学元件；第三支架，用于固定所述第一反射镜和所述第二光学元件，且所述第三支架靠近所述第二光学元件的一端活动连接所述第二反射镜。
基于上述的一种裸眼三维显示装置，对屏幕的没有特定要求，降低了成本，包括但是不限制于手机屏幕或者电视屏幕。本装置不需要集成屏幕，用户自有的屏幕即可实现，例如任意的手机屏幕，提高了便携式和降低了成本。并且可以根据用户的眼睛的位置，通过调节反射镜的角度，从而改变反射的光线，使得观看者更加舒适和方便。而且方便的二维/三维图像切换，只需改变图像的播放内容即可实现。由于可视范围为一圆锥，其他角度理论上无法看到图像，因此这种显示技术的私密性好。
上述可调整参数的菲涅尔透镜，配合使用任意的屏幕，通过2个反射镜，光反射到透镜上，调整光路，使其形成一个空间上的回路，有效的利用三维空间，使得仪器占地小，方便观察者观察的封闭的装置。
为了实现二维/三维可切换播放，二维的时候屏幕不同部分显示同样的图像即可。
为能更进一步了解本申请的特征及技术内容，请参阅以下有关本申请的详细说明与附图，但是此说明和附图仅用来说明本申请，而非对本申请的保护范围作任何的限制。
附图说明
构成本公开一部分的附图用来提供对本公开的进一步理解。本公开的示意性实施例及其说明用于解释本公开，并不构成对本公开的不当限定。附图中：
图1示出根据本申请示例实施例的裸眼三维显示装置的结构俯视图。
图2示出根据本申请示例实施例的裸眼三维显示装置的结构和光路原理示意图。
图3-5示出根据本申请示例实施例的裸眼三维显示装置的结构示意图。
图6示出根据本申请示例实施例的裸眼三维显示装置的光路原理示意图。
图7示出根据本申请示例实施例的裸眼三维显示装置的独立观看特性的光路原理图。
具体实施方式
现在将参考附图更全面地描述示例实施例。然而，示例实施例能够以多种形式实施，且不应被理解为限于在此阐述的实施例；相反，提供这些实施例使得本申请将全面和完整，并将示例实施例的构思全面地传达给本领域的技术人员。在图中相同的附图标记表示相同或类似的部分，因而将省略对它们的重复描述。
所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施例中。在下面的描述中，提供许多具体细节从而给出对本公开的 实施例的充分理解。然而，本领域技术人员将意识到，可以实践本公开的技术方案而没有这些特定细节中的一个或更多，或者可以采用其它的方式、组元、材料、装置或等。在这些情况下，将不详细示出或描述公知结构、方法、装置、实现、材料或者操作。
附图中所示的流程图仅是示例性说明，不是必须包括所有的内容和操作/步骤，也不是必须按所描述的顺序执行。例如，有的操作/步骤还可以分解，而有的操作/步骤可以合并或部分合并，因此实际执行的顺序有可能根据实际情况改变。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其他步骤或单元。
本申请与三维显示的技术原理相似，但有几点不同：一、不需要高刷新率的显示设备，普通屏幕即可；二、角度可调节，方便观看者找到最佳的观看位置。本申请技术方案克服了原有技术的缺点，虽然在于独立显示这一特点和优质的图像仅当人眼在特定位附近时才能达到，但是可以通过调节反射镜片，使得该位置匹配用户的眼睛，更加便利。利用各眼看到的图像可独立控制这一特性，将三维的图像分别投射给左右眼即可实现三维显示。反之屏幕不同的部分，播放完全一样的同一张图像即可实现普通二维显示。所用透镜和反射镜功能也可由镀反射膜的一片偏轴菲涅尔透镜实现。
下面结合附图详细说明本公开的实施方式，根据本申请实施例的一种裸眼三维显示装置进行详细说明。
图1示出根据本申请示例实施例的裸眼三维显示装置的结构俯视图。图2示出根据本申请示例实施例的裸眼三维显示装置的结构和光路原理示意图。
如图1-2所示，根据本申请示例实施例，本申请公开一种裸眼三维显示装置包括至少一对第一光学元件2、3、第二光学元件4、第一反射镜7和第二反射镜8。
使用者提供至少一对图像光源1用于投射图像光。至少一对第一光学元件2、3接收图像光，从至少一对第一光学元件2、3射出后，经第一反射镜7反射，反射后的图像光经过第二光学元件4和第二反射镜8，射入人眼5、6成像。
图3-5示出根据本申请示例实施例的裸眼三维显示装置的结构示意图。
根据本申请实施例，根据本申请的裸眼三维显示装置在实现相同成像效果的光路结构可以分为三种路线传输图像光来成像。
如图3所示，图像光入射至少一对第一光学元件2、3，从至少一对第一光学元件2、3射出后，经第一反射镜7反射后，分两种情况射入人眼5、6。第一种情况是，第一反射镜7反射后的图像光入射第二光学元件4，从第二光学元件4射出的图像光经第二反射镜8反射后，射入人眼5、6成像。如图4所示，第二种情况是，第一反射镜7反射后的图像光入射第二反射镜8，第二反射镜8反射后的图像光经第二光学元件4射入人眼5、6成像。
如图5所示，第三种情况是，所述第一反射镜7接收图像光，经反射后的图像光入射所述至少一对第一光学元件2,3，从所述至少一对第一光学元件2,3射出的图像光经所述第二反射镜8反射后的图像光经所述第二光学元件4射入人眼成像。
根据本申请实施例，裸眼三维显示装置还包括第一支架14、第二支架13和第三支架12。
第一支架14、第二支架13和第三支架12的一端设置于裸眼三维显示装置的平台平面9上。
第一支架14配置为可调节，用于放置图像光源，可以是生成至少一对图像光源1的屏幕。第二支架13配置为可移动，用于设置至少一对第一光学元件2、3。第三支架12用于固定第一反射镜7的一端和第二光 学元件4，第一反射镜7的另一端抵接于三维显示装置的平台平面9上，且第三支架12靠近第二光学元件4的一端活动连接第二反射镜8。
根据本申请实施例，每对图像光源1的成像显示于同一屏幕或两个屏幕上，每对图像光源1与至少一对第一光学元件2、3相对设置。为了实现二维/三维可切换播放，二维的时候屏幕不同部分显示同样的图像即可。
每对第一光学元件可以采用2个会聚透镜，每个会聚透镜与一个图像光的成像相对设置，每个图像光射入与其相对设置的会聚透镜。
根据本申请实施例，第二光学元件4包括菲涅尔透镜。第二反光镜的角度能够手动或电动调节。基于可调整参数的菲涅尔透镜，配合使用任意的屏幕，通过2个反射镜，光反射到透镜上，调整光路，使其形成一个空间上的回路，有效的利用三维空间，使得仪器占地小，方便观察者观察的封闭的装置。
根据本申请实施例，至少一对图像光源1、至少一对第一光学元件2、3和第二反射镜8的参数能够依据不同的观看指标进行调整。
观看指标包括观看距离和观看角度，至少一对第一光学元件2、3的参数包括大小、焦距和主轴的位置，第二反射镜8的参数包括大小、角度、反射率，至少一对图像光源1的参数包括相对至少一对第一光学元件2、3的位置、焦距和投出的图像的大小。
图6示出根据本申请示例实施例的裸眼三维显示装置的光路原理示意图。图7示出根据本申请示例实施例的裸眼三维显示装置的独立观看特性的光路原理图。
如图6所示，为了便于说明，先阐述一对图像光源1一侧的成像过程，以屏幕上左侧的图像为例。首先输入的左右测屏幕不同的三维堆叠的图像，比如此时左测屏幕是像A：调整屏幕的焦距，发出的图像光在经过至少一对第一光学元件2、3后在第一反射镜7上形成一个实像A。图像光线继续经过第二光学元件4后，会在第二反射镜8上产生个像，即A，此时再经过第二反射镜8反射图像光线。图像光线进入人眼5、6内 的晶状体后会汇聚产生一个实像A。屏幕右侧与这个同理。
同一屏幕的独立成像是利用同一块屏幕左右部分分别投影图像的位置的不同，经过至少一对第一光学元件2、3后，图像光线的会聚方向不同而实现的。如图7所示，其原理是：如果把左侧(或者右侧)屏幕近似为点光源，那么其发出的图像光线经过透镜后，会会聚在一个点上(实像点)，因此人眼5、6只能接收到一部分屏幕发出的这一点光源的光，从而使得此处的人眼5、6只能看到两个虚像11中的一个。
为了说明任意的屏幕都可以使用，本申请实例使用目前市场上常用的手机屏幕作为实施一对图像光源1来说明实例，参见图3。
采用任意牌子的手机屏幕，可将手机屏幕布置在裸眼三维显示装置的屏幕位置处，基于手机屏幕的特征，通过移动第二支架13调节至少一对第一光学元件2、3与手机屏幕的距离，以及调节第二反射镜8，使得观看者方便观察，第二反射镜8是为了方便布置或者集成化为一个封闭的便携的手机三维显现的装置。
本申请的裸眼三维显示装置的第一支架14方便调整屏幕图像，比如操作时候，可以通过第一支架14的旋转把屏幕转到观察者的一侧，方便调节图像，待调整完毕后，可转回显示工作位置。
通过第三支架12把第一反射镜7和第二光学元件4进行固定设置，并且第三支架12靠近第二光学元件4的一端利用转轴10的结构，将第二反射镜8活动连接，围绕转轴10的轴心进行旋转。本申请中的第一反射镜7和第二光学元件4按用户的观看指标设置好位置后，观看的时候不能调节，否则会影响光路。可以根据用户的人眼5、6的位置，调节反射镜的角度，从而改变反射的光线，使得观看者更加舒适和方便。而且方便的二维/三维图像切换，只需要改变图像的播放内容即可。由于可视范围为一圆锥，其他角度理论上无法看到图像，因此这种显示技术的私密性好。
最后应说明的是：以上所述仅为本公开的示例实施例而已，并不用 于限制本公开，尽管参照前述实施例对本公开进行了详细的说明，对于本领域的技术人员来说，其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换。凡在本公开的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。

Claims (10)

  1. 一种裸眼三维显示装置，其特征在于，包括：
    至少一对第一光学元件和第二光学元件；
    第一反射镜和第二反射镜，所述至少一对第一光学元件接收图像光，从所述至少一对第一光学元件射出后，经所述第一反射镜反射，反射后的图像光经过所述第二光学元件和所述第二反射镜，射入人眼成像。
  2. 根据权利要求1所述的裸眼三维显示装置，其特征在于，所述第一反射镜反射后的图像光入射所述第二光学元件，从所述第二光学元件射出的图像光经所述第二反射镜反射后，射入人眼成像。
  3. 根据权利要求1所述的裸眼三维显示装置，其特征在于，所述第一反射镜反射后的图像光入射所述第二反射镜，所述第二反射镜反射后的图像光经所述第二光学元件射入人眼成像。
  4. 根据权利要求1所述的裸眼三维显示装置，其特征在于，每对第一光学元件包括2个会聚透镜。
  5. 根据权利要求1所述的裸眼三维显示装置，其特征在于，所述第二光学元件包括菲涅尔透镜。
  6. 根据权利要求1所述的裸眼三维显示装置，其特征在于，还包括：
    第一支架，配置为可调节，用于放置图像光源；
    第二支架，配置为可移动，用于设置所述至少一对第一光学元件；
    第三支架，用于固定所述第一反射镜和所述第二光学元件，且所述第三支架靠近所述第二光学元件的一端活动连接所述第二反射镜。
  7. 根据权利要求1所述的裸眼三维显示装置，其特征在于，所述第二反光镜的角度能够手动或电动调节。
  8. 一种裸眼三维显示装置，其特征在于，包括：
    至少一对第一光学元件和第二光学元件；
    第一反射镜和第二反射镜，所述第一反射镜接收图像光，经反射后的图像光入射所述至少一对第一光学元件，从所述至少一对第一光学元件射出的图像光经所述第二反射镜反射后的图像光经所述第二光学元件射入人眼成像。
  9. 根据权利要求8所述的裸眼三维显示装置，其特征在于，每对第一光学元件包括2个会聚透镜；所述第二光学元件包括菲涅尔透镜。
  10. 根据权利要求8所述的裸眼三维显示装置，其特征在于，还包括：
    第一支架，配置为可调节，用于放置图像光源；
    第二支架，配置为可移动，用于设置所述至少一对第一光学元件；
    第三支架，用于固定所述第一反射镜和所述第二光学元件，且所述第三支架靠近所述第二光学元件的一端活动连接所述第二反射镜。
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