WO2020124627A1 - 一种近眼显示系统及眼镜式虚拟显示器 - Google Patents

一种近眼显示系统及眼镜式虚拟显示器 Download PDF

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WO2020124627A1
WO2020124627A1 PCT/CN2018/123776 CN2018123776W WO2020124627A1 WO 2020124627 A1 WO2020124627 A1 WO 2020124627A1 CN 2018123776 W CN2018123776 W CN 2018123776W WO 2020124627 A1 WO2020124627 A1 WO 2020124627A1
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mirror
light
lens
eye display
display system
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PCT/CN2018/123776
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English (en)
French (fr)
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舒伟
屈春龙
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舒伟
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B27/0172—Head mounted characterised by optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/10—Scanning systems

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  • the invention relates to the technical field of virtual reality equipment, in particular to a near-eye display system and glasses-type virtual display.
  • the existing glasses-type virtual display mainly includes three structures: 1. A micro display and a lens constitute a display module, but due to the need to use a larger optical lens, which results in bulkiness and poor portability; 2. A micro display and an optical waveguide constitute a display module. Because the imaging field of view of the optical waveguide structure is very small, it cannot be used for the display of large screens; 3. The laser light source and the micro-galvanometer scanner form a display module. Due to the direct laser light, the field of view is small, and the user needs to be at a specific angle. See the image.
  • the purpose of the present invention is to overcome the shortcomings of the prior art, to provide a glasses-type virtual display and its near-eye display system, which can avoid the small field of view caused by direct laser light, and can reasonably reduce the volume and enhance the convenience of carrying.
  • the first aspect of the present invention provides a near-eye display system, which includes a scanning galvanometer, a mirror group, and a light-emitting device for electrically connecting with an external image input device and emitting an optical signal.
  • a lens group is provided on the light path of the light emitting device and the scanning galvanometer, and the reflecting mirror group is provided on the exit light path of the scanning galvanometer;
  • the scanning galvanometer converts the optical signal focused by the lens group into a scanned image for projection onto the mirror, and the scanned image is reflected by the mirror group and converged to the human eye.
  • the mirror group is a concave mirror group.
  • the mirror group includes a first mirror and a second mirror, the first mirror is disposed on an exit optical path of the scanning galvanometer, and the second mirror is located on the first reflection Mirror's reflected light path.
  • the second mirror is a transparent mirror or a semi-transparent mirror.
  • the near-eye display system further includes an adjustment switch for adjusting the transparency and the transparent range of the second mirror.
  • the adjustment switch is a liquid crystal display panel.
  • the second mirror is in a sheet shape.
  • the lens group includes a first lens and a second lens, two opposing surfaces of the first lens are concave surfaces, and two opposing surfaces of the second lens are convex surfaces; a concave surface of the first lens faces In the light-emitting device, the other concave surface of the first lens faces a convex surface of the second lens, and the other convex surface of the second lens faces the scanning galvanometer.
  • the light emitting device includes at least one light emitting diode.
  • the light-emitting device is a display screen.
  • the second aspect of the present invention also provides a glasses-type virtual display, which includes a frame and two near-eye display systems as described in the first aspect, and the two near-eye display systems are respectively disposed on two sides of the frame side.
  • the glasses-type virtual display and its near-eye display system of the embodiments of the present invention use a light emitting device capable of dispersing natural light in various directions to cooperate with the lens group, and an external image input device controls the light emitting device to emit light signals of different colors, and the light signals pass through the lens
  • the group After the group is focused, it enters the scanning galvanometer, and the scanning galvanometer converts the optical signal into a scanned image. After the scanning image is projected and reflected by the mirror group, it can eventually be converged to the human eye; Avoid using direct laser light, which can increase the viewing angle, and is equipped with a mirror group, which is convenient for adjusting the positional relationship of each component, can reduce the volume of glasses-type virtual displays, and improve portability.
  • FIG. 1 is a schematic structural diagram of a near-eye display system in an embodiment of the present invention.
  • FIG. 2 is a glasses-type virtual display in an embodiment of the present invention
  • scanning galvanometer 20, mirror group; 21, first mirror; 22, second mirror; 30, light emitting device; 40, lens group; 41, first lens; 42, second lens ; 50, picture frame.
  • a preferred embodiment of the first aspect of the present invention provides a near-eye display system, which includes a light-emitting device 30, a lens group 40, a scanning galvanometer 10, and a mirror group 20 that are sequentially arranged along the optical path direction;
  • the light-emitting device 30 can emit natural light in various directions.
  • the light-emitting device 30 is used to electrically connect with an external image input device.
  • the light-emitting device 30 After an external image signal is input to the light-emitting device 30, the light-emitting device 30 according to different image signals An optical signal with a color change is generated, and the optical signal is focused on the scanning galvanometer 10 through the lens group 40, and the scanning galvanometer 10 converts the focused optical signal into a scanned image by means of X and Y-axis scanning and passes through the reflecting mirror After reflection, the group 20 converges to the human eye to form an image that can be viewed.
  • a light emitting device 30 that emits natural light emits light, then focuses through the lens group 10, and finally the mirror group 20 reflects to the human eye for imaging; since it is not a conventional direct projection imaging of the retina, it is not necessary
  • the use of a bulky optical lens can simplify the overall structure and reduce the volume; and avoid the use of direct laser light, the field of view is increased, and the image does not need to be viewed at a specific angle.
  • the mirror group 20 is a concave mirror group, that is, the reflective surface in the mirror group 20 is a concave surface.
  • the mirror group 20 includes a first mirror 21 and a second mirror 22, the first mirror 21 is disposed on the exit optical path of the scanning galvanometer 10, and the first The second reflecting mirror 22 is located on the reflected optical path of the first reflecting mirror 21; through the first reflecting mirror 21 and the second reflecting mirror 22, the scanned image can be virtualized into a distant virtual image, and the virtual image finally passes through the second reflecting mirror 22 Reflecting on human glasses; for example, referring to FIG. 1, the reflective surfaces of the first mirror 21 and the second mirror 22 are both concave, which can ensure a sufficiently large field of view.
  • the mirror group 20 may include one or three or more mirrors.
  • the second mirror 22 in this embodiment is a transparent mirror or a semi-transparent mirror, that is, it can better integrate the image in reality and the virtual image, thereby realizing the visual effect of virtual augmented reality.
  • the second mirror 22 is made of a transparent material
  • an adjustment switch for adjusting the transparency and the transparent range of the second mirror 22 may be provided in the near-eye display system to change the display area and control the display effect of each area; for example, The adjustment switch may be, but not limited to, a liquid crystal display panel.
  • the second mirror 22 in this embodiment is in the form of a sheet, and the refractive index of the actual image after entering the eye is small, and basically does not deform.
  • the lens group 40 includes a first lens 41 and a second lens 42.
  • the two opposite surfaces of the first lens 41 are concave surfaces, and the two opposite surfaces of the second lens 42 are convex surfaces.
  • a concave surface of the first lens 41 faces the light emitting device 30, another concave surface of the first lens 41 faces a convex surface of the second lens 42, another convex surface of the second lens 40 faces the ⁇ 10 ⁇ Scanning galvanometer 10.
  • the light emitting device 30 in this embodiment may be a light emitting diode, and the light emitting device 30 may also be composed of multiple light emitting diodes.
  • the light-emitting device 30 may also be a display screen; specifically, an OLED display screen.
  • the preferred embodiment of the second aspect of the present invention further provides a glasses-type virtual display, which includes a frame 50 and two near-eye display systems as in the embodiment of the first aspect, two of which are near-eye
  • the display systems are respectively disposed on the left and right sides of the frame 50 to reflect into the left eye and the right eye, respectively.
  • the glasses-type virtual display in this embodiment includes the near-eye display system provided in the first aspect, it has all the beneficial effects of the near-eye display system, and will not be elaborated here.
  • the light-emitting device 30, the lens group 40, the scanning galvanometer 10, and the first mirror 21 in the two near-eye display systems are respectively disposed inside the two temples of the frame 50, the second The reflecting mirror 22 is embedded in the front side of the frame 50 as a lens of eyeglasses, and has a simple structure.
  • the embodiments of the present invention provide a glasses-type virtual display and its near-eye display system.
  • the near-eye display system uses a light emitting device 30 capable of dispersing natural light in various directions and a group of lenses 40, and an external image input device controls the light emitting device to emit Optical signals of different colors.
  • the optical signals After being focused by the lens group 40, the optical signals enter the scanning galvanometer 10, and the scanning galvanometer 10 converts the optical signals into a scanned image.
  • the scanned image is then reflected by the mirror group 20 to finally converge to people Eye, simple structure, small size, and large viewing angle.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Optical Scanning Systems (AREA)

Abstract

一种虚拟现实设备技术领域的近眼显示系统及眼镜式虚拟显示器，近眼显示系统包括：扫描振镜（10）、反射镜组（20）及用于与外部的图像输入装置电连接并发出光信号的发光装置（30），发光装置（30）用于朝各个方向发散自然光，发光装置（30）与扫描振镜（10）的光路上设置有透镜组（40），反射镜组（20）设于扫描振镜（10）的出射光路上；扫描振镜（10）将通过透镜组（40）聚焦后的光信号转化成用于投射至反射镜组（20）的扫描图像，扫描图像经反射镜组（20）反射后会聚至人眼。该近眼显示系统结构简洁，能够有效减小设备的体积，且可视范围大。

Description

一种近眼显示系统及眼镜式虚拟显示器 技术领域
本发明涉及虚拟现实设备技术领域，特别是涉及一种近眼显示系统及眼镜式虚拟显示器。
背景技术
现有的眼镜式虚拟显示器主要包括三种结构：1、微型显示器和透镜组成显示模块，但由于需要采用较大的光学透镜，导致体积庞大且便携性差；2、微型显示器和光波导组成显示模块，由于光波导结构的成像视野非常小，导致其不能用于大型画面的显示；3、激光光源和微振镜扫描器组成显示模块，由于激光直射导致视野范围很小，使用者需要在特定角度才能看到图像。
发明内容
本发明的目的是克服现有技术的不足，提供一种眼镜式虚拟显示器及其近眼显示系统，能够避免采用激光直射所导致的视野范围小，且能够合理减小体积，增强携带的便利性。
为了实现上述目的，本发明第一方面提供一种近眼显示系统，其包括：扫描振镜、反射镜组及用于与外部的图像输入装置电连接并发出光信号的发光装置，所述发光装置用于朝各个方向发散自然光，所述发光装置与所述扫描振镜的光路上设置有透镜组，所述反射镜组设于所述扫描振镜的出射光路上；
所述扫描振镜将通过所述透镜组聚焦后的光信号转化成用于投射至所述反射镜的扫描图像，所述扫描图像经所述反射镜组反射后会 聚至人眼。
作为优选方案，所述反射镜组为凹面反射镜组。
作为优选方案，所述反射镜组包括第一反射镜和第二反射镜，所述第一反射镜设置于所述扫描振镜的出射光路上，所述第二反射镜位于所述第一反射镜的反射光路上。
作为优选方案，所述第二反射镜为透明镜或者半透半反射镜。
作为优选方案，所述近眼显示系统还包括用于调节所述第二反射镜的透明度及透明范围的调节开关。
作为优选方案，所述调节开关为液晶显示面板。
作为优选方案，所述第二反射镜呈片状。
作为优选方案，所述透镜组包括第一透镜和第二透镜，所述第一透镜中相对的两面为凹面，所述第二透镜相对的两面为凸面；所述第一透镜的一凹面朝向所述发光装置，所述第一透镜的另一凹面朝向所述第二透镜的一凸面，所述第二透镜的另一凸面朝向所述扫描振镜。
作为优选方案，所述发光装置包括至少一个发光二极管。
作为优选方案，所述发光装置为显示屏。
同样的目的，本发明第二方面还提供一种眼镜式虚拟显示器，其包括镜框及两个如第一方面所述的近眼显示系统，两个所述近眼显示系统分别设置于所述镜框的两侧。
与现有技术相比，本发明的有益效果在于：
本发明实施例的眼镜式虚拟显示器及其近眼显示系统，采用能够朝各个方向发散自然光的发光装置与透镜组相配合，外部的图像输入装置控制发光装置发出不同颜色的光信号，光信号经透镜组聚焦后射入扫描振镜，扫描振镜将光信号转化成扫描图像，扫描图像再经过反射镜组投射反射后，最终能够会聚至人眼；本发明中，由于采用发散自然光的发光装置，避免采用激光直射，能够增大可视角度，且设置有反射镜组，便于调整各部件的位置关系，可减小眼镜式虚拟显示器 的体积，提高携带的便携性。
附图说明
图1是本发明实施例中一种近眼显示系统的结构示意图；
图2是本发明实施例中一种眼镜式虚拟显示器；
图中，10、扫描振镜；20、反射镜组；21、第一反射镜；22、第二反射镜；30、发光装置；40、透镜组；41、第一透镜；42、第二透镜；50、镜框。
具体实施方式
下面结合附图和实施例，对本发明的具体实施方式作进一步详细描述。以下实施例用于说明本发明，但不用来限制本发明的范围。
在本发明的描述中，需要理解的是，术语“上”、“下”、“左”、“右”、“顶”、“底”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。应当理解的是，本发明中采用术语“第一”、“第二”等来描述各种信息，但这些信息不应限于这些术语，这些术语仅用来将同一类型的信息彼此区分开。例如，在不脱离本发明范围的情况下，“第一”信息也可以被称为“第二”信息，类似的，“第二”信息也可以被称为“第一”信息。
如图1所示，本发明第一方面的优选实施例提出一种近眼显示系统，其包括沿着光路方向依次设置的发光装置30、透镜组40、扫描振镜10及反射镜组20；其中，本实施例中的所述发光装置30能够朝各个方向发散自然光，发光装置30用于与外部的图像输入装置电连接，外部的图像信号输入发光装置30后，发光装置30根据不同的 图像信号产生颜色变化的光信号，所述光信号通过透镜组40聚焦于扫描振镜10上，扫描振镜10采用X、Y轴扫描的方式将聚焦后的光信号转化成扫描图像，并通过反射镜组20反射后会聚至人眼形成可以观看到的图像。
基于上述技术方案，本实施例中，采用发散自然光的发光装置30发光，再通过透镜组10聚焦，最后反射镜组20反射至人眼的方式成像；由于不是传统的视网膜直接投影成像，不需要采用体积庞大的光学透镜，可使整体结构简洁化、小体积化；且避免了采用激光直射，视野范围增大，不需要在特定角度才能观看到图像。
本实施例中，为了能够进一步增大可观察到图像的视野范围，所述反射镜组20为凹面反射镜组，即将反射镜组20中的反光面设为凹面。
具体地，本实施例中，所述反射镜组20包括第一反射镜21和第二反射镜22，所述第一反射镜21设置于所述扫描振镜10的出射光路上，所述第二反射镜22位于所述第一反射镜21的反射光路上；通过第一反射镜21和第二反射镜22能够将扫描图像虚拟成远处的虚拟图像，虚拟图像最终经第二反射镜22反射到人的眼镜；示例性地，参照附图1所示，第一反射镜21和第二反射镜22的反光面均设为凹面，能够保证足够大的视野范围。
示例性地，根据反射需求，反射镜组20可包括一个或者三个及三个以上的反射镜。
优选地，本实施例中的第二反射镜22为透明镜或者半透半反射镜，即能够将现实中的图像和虚拟图像更好地融合，从而实现虚拟增强现实的视觉效果。示例性地，第二反射镜22采用透明材料制成
根据实际需求，可在近眼显示系统中设置调节第二反射镜22的透明度及透明范围的调节开关(附图中未示出)，以改变显示区域及控制各个区域的显示效果；示例性地，所述调节开关可以但不限于为液 晶显示面板。
对上述技术方案进行限定，示例性地，本实施例中的第二反射镜22呈薄片状，现实中的图像进入眼睛后折射率较小，基本不会产生变形。
本实施例中，为了实现聚焦功能，所述透镜组40包括第一透镜41和第二透镜42，所述第一透镜41中相对的两面为凹面，所述第二透镜42相对的两面为凸面；所述第一透镜41的一凹面朝向所述发光装置30，所述第一透镜41的另一凹面朝向所述第二透镜42的一凸面，所述第二透镜40的另一凸面朝向所述扫描振镜10。
进一步地，本实施例中的发光装置30可以为发光二极管，所述发光装置30也可以由多个发光二极管组成。
作为上述技术方案的可替换方案，所述发光装置30也可以为显示屏；具体地，为OLED显示屏。
请参阅附图2所示，本发明第二方面的优选实施例还提供一种眼镜式虚拟显示器，其包括镜框50及两个如第一方面实施例中的近眼显示系统，两个所述近眼显示系统分别设置于所述镜框50的左、右两侧，以分别反射至左眼和右眼中。
本实施例中的眼镜式虚拟显示器由于包括第一方面提供的近眼显示系统，因此具有近眼显示系统的所有有益效果，在此不作一一陈述。
作为优选方案，本实施例中，将两个近眼显示系统中的发光装置30、透镜组40、扫描振镜10及第一反射镜21分别设置在镜框50的两个镜腿的内侧，第二反射镜22嵌设在镜框50的前侧以作为眼镜的镜片，结构简洁。
综上，本发明实施例提供一种眼镜式虚拟显示器及其近眼显示系统，近眼显示系统采用能够朝各个方向发散自然光的发光装置30与透镜40组相配合，外部的图像输入装置控制发光装置发出不同颜色的光 信号，光信号经透镜组40聚焦后射入扫描振镜10，扫描振镜10将光信号转化成扫描图像，扫描图像再经过反射镜组20投射反射后，最终能够会聚至人眼，结构简洁、体积小，且可视角度大。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和替换，这些改进和替换也应视为本发明的保护范围。

Claims (10)

  1. 一种近眼显示系统，其特征在于，包括：扫描振镜、反射镜组及用于与外部的图像输入装置电连接并发出光信号的发光装置，所述发光装置用于朝各个方向发散自然光，所述发光装置与所述扫描振镜的光路上设置有透镜组，所述反射镜组设于所述扫描振镜的出射光路上；
    所述扫描振镜将通过所述透镜组聚焦后的光信号转化成用于投射至所述反射镜的扫描图像，所述扫描图像经所述反射镜组反射后会聚至人眼。
  2. 如权利要求1所述的近眼显示系统，其特征在于，所述反射镜组为凹面反射镜组。
  3. 如权利要求1所述的近眼显示系统，其特征在于，所述反射镜组包括第一反射镜和第二反射镜，所述第一反射镜设置于所述扫描振镜的出射光路上，所述第二反射镜位于所述第一反射镜的反射光路上。
  4. 如权利要求3所述的近眼显示系统，其特征在于，所述第二反射镜为透明镜或者半透半反射镜。
  5. 如权利要求4所述的近眼显示系统，其特征在于，还包括用于调节所述第二反射镜的透明度及透明范围的调节开关。
  6. 如权利要求5所述的近眼显示系统，其特征在于，所述调节开关为液晶显示面板。
  7. 如权利要求3所述的近眼显示系统，其特征在于，所述第二反射镜呈片状。
  8. 如权利1所述的近眼显示系统，其特征在于，所述透镜组包括第一透镜和第二透镜，所述第一透镜中相对的两面为凹面，所述第二透镜相对的两面为凸面；所述第一透镜的一凹面朝向所述发光装置，所述第一透镜的另一凹面朝向所述第二透镜的一凸面，所述第二透镜的另一凸面朝向所述扫描振镜。
  9. 如权利要求1所述的近眼显示系统，其特征在于，所述发光装置为发光二极管或者显示屏。
  10. 一种眼镜式虚拟显示器，其特征在于，包括镜框及两个如权利要求1-9中任一项所述的近眼显示系统，两个所述近眼显示系统分别设置于所述镜框的两侧。
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