WO2018058938A1 - 穿戴式设备和无人机*** - Google Patents

穿戴式设备和无人机*** Download PDF

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Publication number
WO2018058938A1
WO2018058938A1 PCT/CN2017/080452 CN2017080452W WO2018058938A1 WO 2018058938 A1 WO2018058938 A1 WO 2018058938A1 CN 2017080452 W CN2017080452 W CN 2017080452W WO 2018058938 A1 WO2018058938 A1 WO 2018058938A1
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WO
WIPO (PCT)
Prior art keywords
screen
optical element
light
eyepiece
incident
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PCT/CN2017/080452
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English (en)
French (fr)
Inventor
蒋梦瑶
刘怀宇
Original Assignee
深圳市大疆创新科技有限公司
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Application filed by 深圳市大疆创新科技有限公司 filed Critical 深圳市大疆创新科技有限公司
Priority to CN201780023973.9A priority Critical patent/CN109073906B/zh
Publication of WO2018058938A1 publication Critical patent/WO2018058938A1/zh

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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
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0018—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for preventing ghost images
    • 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
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0138—Head-up displays characterised by optical features comprising image capture systems, e.g. camera

Definitions

  • the present invention relates to the field of virtual reality, and more particularly to wearable devices and drone systems.
  • Virtual reality technology is a computer simulation system that can create and experience a virtual world. It uses a computer to generate a simulation environment. It is a multi-source information fusion, interactive 3D dynamic vision and system simulation of physical behavior to make The user is immersed in the environment.
  • the present invention provides wearable devices and drone systems to avoid ghosting and eliminate image sticking.
  • a wearable display device comprising: a first screen and a second screen disposed at an angle, a first eyepiece corresponding to the first screen, and a second eyepiece corresponding to the second screen, the key being The device further includes: a body, and an optical component disposed between the first screen and the second screen;
  • a surface specifying portion of the optical element is subjected to a roughening process for causing diffuse reflection to cause diffuse reflection of light directed to the specified portion;
  • the fuselage carries the first screen, the second screen, the optical element, the first eyepiece, and the second eyepiece.
  • An unmanned aerial vehicle system comprising: a wearable display device and an unmanned aerial vehicle, the unmanned aerial vehicle comprising a camera module for taking a picture at a first angle of view of the unmanned aerial vehicle, the camera module being communicatively coupled to the wearable display A device, the wearable device comprising a wearable display device as described above.
  • the rough processing performed on the surface of the optical element blocks a part of the light incident from the second screen to the first eyepiece and the light incident from the first screen to the second eyepiece, the second screen and the first screen are completely eliminated. Shadow.
  • FIG. 1 is a schematic structural diagram of an unmanned aerial vehicle system 200 according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a wearable device 100 according to an embodiment of the present invention.
  • FIG. 3 is an optical path diagram of light emitted from a first screen provided to the optical element according to the present invention.
  • FIG. 4 is an optical path diagram of light emitted from a second screen provided to the optical element according to the present invention.
  • FIG. 5 is a schematic structural diagram of another wearable device 100 according to the present invention.
  • FIG. 6 is a structural diagram of a wearable device according to a fifth embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a designated portion for performing rough processing according to a fifth embodiment of the present invention.
  • FIG. 8 is another schematic structural diagram of a designated portion for performing rough processing according to a fifth embodiment of the present invention.
  • FIG. 9 is a schematic diagram of the principle of a wearable device provided by the present invention.
  • FIG. 1 is a schematic structural diagram of a UAV system 200 according to an embodiment of the present invention.
  • the drone system 200 includes a wearable display device 100, and an unmanned aerial vehicle 110 having a camera module (not shown) for taking a picture at a first angle of view of the unmanned aerial vehicle.
  • the unmanned aerial vehicle 110 is exemplified in FIG. 1 by a quadrotor. It will be understood that the unmanned aerial vehicle 110 may also be an unmanned aerial vehicle other than a quadrotor.
  • Camera The module is communicatively coupled to the wearable display device 100.
  • the wearable device 100 includes a first screen 10, a second screen 20, an optical element 30, a first eyepiece 40, a second eyepiece 50, a first light blocking member 60 and a second light blocking member 70.
  • 2 shows the structure of the wearable device 100 (not shown in FIG. 2 because the second light blocking member 70 is disposed on the surface of the second screen 20 facing away from the optical element 30).
  • the camera module is configured to take a picture at a first angle of view of the UAV and transmit the image data to the wearable display device 100.
  • the first screen 10 and the second screen 20 may be used to present a picture taken by the camera module.
  • the first screen 10 and the second screen 20 may be in an OLED display, a plasma display, a liquid crystal display, or the like.
  • the first screen 10 and the second screen 20 are respectively connected to an audio and video playback device or connected to the same audio and video playback device, that is, the first screen 10 and the second screen 20 can display the same audio and video, and can also display different audio and video. .
  • the first screen 10 and the second screen 20 are disposed at a predetermined angle.
  • the first screen 10 and the second screen 20 may be vertically disposed.
  • FIG. 1 is schematically illustrated by a vertical arrangement of the first screen 10 and the second screen 20. As shown in FIG. 1, the first screen 10 is in the horizontal direction and the second screen 20 is in the vertical direction. It should be noted that the positions of the first screen 10 and the second screen are also interchangeable, for example, the first screen is in the vertical direction and the second screen 20 is in the horizontal direction.
  • the optical element 30 can achieve partial transmission partial reflection of light.
  • the optical element 30 is plated with a transflective film on the plane of the first screen 10 to achieve partial transmission partial reflection of the light.
  • the optical element 30 can be embodied as a transflective lens or other optical element that realizes partial transmission of light. The invention is further defined in detail.
  • the optical element 30 is provided with the above-mentioned transflective film (not shown in FIG. 1) for making the P component (parallel to the incident surface) and the S component (perpendicular to perpendicular) of the reflected light when the light passes.
  • the phase difference of the incident surface is close to 0° or close to 180°, or the phase difference between the P component and the S component of the transmitted light is close to 0° or close to 180°, thereby eliminating the polarization of the light and being accepted by an eyepiece to enter another An image sticking phenomenon caused by an image of an eyepiece.
  • the optical element 30 is disposed between the first screen 10 and the second screen 20.
  • FIG. 1 is exemplified by a position where the optical element 30 is disposed at an angle bisector of the first screen 10 and the second screen 20.
  • the optical element 30 is plated with an anti-reflection film 32 on the plane of the second screen 20 for eliminating multiple reflections or multiple transmissions of light in the optical element 30.
  • the ghost In the present embodiment, the AR coating 32 and the transflective film can be replaced at the position of the optical element 30.
  • the thickness of the anti-reflection film 32 is emitted along with the first screen 10 or the second screen 20, incident on the The incident light ray of the optical element 30 changes with the change in the incident angle ⁇ formed between the optical elements 30.
  • the thickness of the AR coating is ⁇ /4n, so that the reflected light from the upper and lower surfaces of the AR coating can produce destructive interference, but a thickness such as ⁇ /4n is perpendicular to a certain color.
  • a thickness such as ⁇ /4n is perpendicular to a certain color.
  • the incident angle formed between the incident ray 41 incident on the antireflection film 32 from the first screen 10 or the second screen 20 and the antireflection film 32 is A value of uncertainty between 0 degrees and 90 degrees, so that the incident light rays on the surface of the non-vertical anti-reflection film 32 are destructively interfered with the reflected light generated on the upper and lower surfaces of the anti-reflection film 32, Then, the thickness and material of the anti-reflection film 32 plated on the surface of the optical element 30 are designed such that the thickness of the anti-reflection film 32 is emitted with one of the first screen 10 or the second screen 20 and the light The change of the incident angle formed between the optical elements 30 changes, so that different incident angles correspond to the anti-reflection films 32 of different thicknesses, so that the reflected light generated by each incident light on the upper and lower surfaces of the anti-reflection film 32 is cancelled. Interference, thereby reducing or even eliminating optical component 30
  • the incident angle of light incident vertically from the first screen 10 and the optical element 30 form an incident angle of 45 degrees, and the incidence of the other two incident rays with the optical element 30.
  • the angle is greater than 45 degrees, and the larger the incident angle, the greater the optical path difference (n ⁇ , n is the refractive index, and ⁇ is the wavelength) when transmitted in the antireflection film 32. Therefore, in order to compensate for the optical path difference, the incident angle is The large position is plated with a thin anti-reflection film, and a thicker anti-reflection film 32 is plated at a position where the incident angle is small.
  • the first eyepiece 40 is disposed on the light exiting path after the outgoing light of the first screen 10 is reflected by the optical element 30, and the second eyepiece 50 is disposed after the outgoing light of the second screen 20 is transmitted through the optical element 30.
  • the first eyepiece 40 and the second eyepiece 50 are respectively provided with a polarizing plate 401 on the surface close to the optical element 30.
  • the polarizing plate 401 can be rotated, and the polarizing plate 401 is rotated and adjusted to receive linearly polarized light incident on the surface thereof and filtered. Remove polarized light in other directions.
  • the polarizing plate 401 is for the first eyepiece 40 to receive only the linearly polarized light of the first screen 10, and the second eyepiece 50 only receives the linearly polarized light of the second screen 20.
  • a wave plate may be respectively disposed on the surface of the first eyepiece 40 and the second eyepiece 50 close to the optical element 30, and the wave plate is used to generate a reverse phase difference between the light incident on the wave plate. Reduce residual images.
  • the first light blocking member 60 is disposed on a surface of the first screen 10 facing away from the optical component 30, and the second light blocking member 70 is disposed on a surface of the second screen 20 facing away from the optical component 30, the first light blocking member 60 and The second light blocking member 70 is for blocking the light of the external environment from being projected onto the first screen 10 and the second screen 20, respectively.
  • the light blocking member may be a light transmittance adjustable member.
  • the operation of the wearable display device 100 will be described below.
  • the wear in the present invention The display device 100 is not limited to use in a drone system.
  • FIG. 3 is a light path diagram of light emitted from a first screen provided to the optical element according to the present invention.
  • the light emitted from the first screen 10 is incident on the optical element 30 to form the incident light 41, and the incident light 41 is reflected and refracted on the surface of the optical element 30 to obtain the reflected light 43 and the refracted light 42.
  • the refracted ray 42 is reflected and refracted on the second surface 321 of the anti-reflection film 32 to obtain reflected light 44 and refracted light 45.
  • the refracted ray 45 is reflected and refracted on the first surface 320 of the anti-reflection film 32 to obtain reflected ray 47 and refracted ray 46.
  • the reflected ray 44 of the second surface 321 of the anti-reflection film 32 interferes with the reflected ray 47 of the first surface 320.
  • the reflected light 43 and the refracted ray 46 are received, and the reflected ray 43 is received by the first eyepiece 40, and the refracted ray is emitted from the optical element 30 without being utilized.
  • the first eyepiece 40 receives the reflected light 43 while avoiding ghosting.
  • FIG. 4 is a light path diagram of light incident on the second screen provided by the present invention.
  • the light emitted by the second screen 20 is first incident on the anti-reflection film 32 to form incident light rays 51, and the incident light rays 51 are reflected and refracted on the first surface 320 of the anti-reflection film 32 to obtain the refracted light 52 and the reflected light.
  • the refracted ray 52 is reflected and refracted on the second surface 321 of the anti-reflection film 32 to obtain a reflected ray 54 and a refracted ray 56.
  • the refracted ray 56 is reflected and refracted on the surface of the optical element 30 to obtain a reflected ray 57 and a refracted ray.
  • the reflected ray 57 is again reflected and refracted on the surface of the optical element 30 in contact with the anti-reflection film 32, and the reflected ray 61 and the refracted ray 59 are obtained, and the refracted ray 59 is reflected at the first surface 320 to obtain the reflected ray 62 due to
  • the second eyepiece 50 is located on the side opposite to the second screen 20, so that the second eyepiece 50 can only receive light transmitted from the optical element 30, so that light emitted from the first surface 320, such as reflected light 53, will not be The binoculars 50 receive that this portion of the light will not be utilized.
  • the reflected rays 61, 62 generated on the first surface 320 and the second surface 321 of the AR coating 32 undergo interference cancellation, so that the second eyepiece 50 receives only the refracted ray
  • the second embodiment is substantially the same as the first embodiment except that the wearing device 300 of the second embodiment does not include the first light blocking member 60 and the second light blocking member 70, but includes a fixing frame 90.
  • FIG. 5 shows the structure of the wearable device 300.
  • the fixing frame 90 includes a first frame 91 and a second frame 92 that are opposite to each other and a third frame 93 that vertically connects the first frame 91 and the second frame 92.
  • the first screen 10 is disposed on the inner wall of the first frame 91
  • the second screen 20 is disposed on the inner wall 93 of the third frame
  • the optical element 30 is disposed at a position of an angle bisector formed by the first frame 91 and the third frame 93 and abuts against the second frame 92.
  • the third embodiment is substantially the same as the first embodiment except that the surface of the optical element 30 is divided into a plurality of regions from the first screen 10 to the first screen 10, and the area of each region can be equal.
  • the regions may be unequally plated with the same thickness of the AR coating 32 such that the thickness of the AR coating 32 exhibits a gradient change.
  • the fourth embodiment is substantially the same as the first embodiment except that the surface of the optical element 30 is divided into a plurality of regions from the first screen 10 to the first screen 10, each region being plated with the same thickness. Antireflection film 32. The thickness of the AR coating 32 is changed gradually.
  • the wearable display device provided by the present invention such as the wearable display device 100, 300 described above, is incident on the anti-reflection film 32 by the anti-reflection film 32 through the anti-reflection film 32 plated on one surface of the optical element 30.
  • the reflected light of the first surface 320 and the second surface 321 interferes with each other, so that the first eyepiece 40 receives only the reflected light, and the second eyepiece 50 receives the refracted light transmitted from the optical element 30, thereby solving the wearable display device when worn.
  • the resulting ghost phenomenon makes the wearable display device more realistic and clear when viewing images.
  • the transmittance of the antireflection film of the optical element 30 is unlikely to reach 100%, and the incident angle of the first screen emitted toward the rear surface of the optical element 30 is close to the total reflection angle, and the reflectance is significantly increased.
  • Simply relying on the AR coating does not completely eliminate ghosting, and the ghost of the first eyepiece 40 can be severe compared to the second eyepiece 50.
  • first eyepiece 40 and the second eyepiece 50 are respectively provided with polarizing plates 401 on the surface close to the optical element 30 to receive linearly polarized light incident on the surface thereof and to filter out polarized light in other directions, However, it is impossible to completely eliminate one surface-type polarized light, and it is often the case that the first eyepiece 40 sees the afterimage of the second screen 20, and the second eyepiece 50 sees the afterimage of the first screen 10.
  • the present invention also provides another wearable device. See the fifth embodiment for details.
  • FIG. 6 is a structural diagram of a wearable device according to a fifth embodiment of the present invention.
  • the wearable device as shown in FIG. 6 may include: a first screen 10 and a second screen 20 disposed at an angle, a first eyepiece 40 corresponding to the first screen 10, and a second eyepiece 50 corresponding to the second screen 20 .
  • the first screen 10, the second screen 20, the first eyepiece 40, and the second eye The mirrors 50 are all described as described in the first embodiment, and will not be described herein.
  • the wearable device further includes: a body 600, and an optical element 06 disposed between the first screen 10 and the second screen 20.
  • the optical element 06 in the present embodiment is different from the optical element 30 in the above-described first embodiment.
  • the surface specifying portion of the optical element 06 in the present embodiment is subjected to a roughening process for causing diffuse reflection to diffusely reflect light directed to a prescribed portion.
  • the body 600 in the present embodiment carries the first screen 10, the second screen 20, the optical element 06, the first eyepiece 40, and the second eyepiece 50.
  • the optical element 06 in the present embodiment may be obtained by the above-described optical element 30 being subjected to a roughening treatment for causing diffuse reflection at a designated portion of the surface on which the antireflection film is provided.
  • the reason why the specified portion is roughened here is to diffuse the light that is directed to the specified portion.
  • first screen 10 and the second screen 20 are perpendicular to each other.
  • the first screen 10 is in the horizontal direction and the second screen 20 is in the vertical direction.
  • the designated portion on which the roughening process is performed on the optical element 06 is located on a surface of the optical element 06 facing the second screen 20 except for the second screen imaging region.
  • Fig. 7 exemplifies a designated portion for performing rough processing.
  • the designated portion on which the roughening process is performed on the optical element 06 may be: an area on the surface of the optical element 06 facing the second screen 20 other than the second screen imaging area and belonging to the first screen imaging area.
  • Fig. 8 shows a designated portion for performing rough processing.
  • the first screen 10 is in a vertical direction and the second screen 20 is in a horizontal direction.
  • the designated portion on which the roughening process is performed on the optical element 06 is located on the surface of the optical element 06 facing the first screen 10 except for the first screen imaging area, which is similar to FIG. 7 described above and will not be illustrated by the drawings.
  • the specified portion of the optical element 06 performing the roughening process may be: a portion other than the first screen imaging area on the surface of the optical element facing the first screen and belonging to the second screen imaging area Area. This is similar to Figure 8 above and will not be illustrated by the drawings.
  • FIG. 9 is a schematic diagram of a wearable device provided by the present invention.
  • the light emitted from the first screen 10 is incident on the optical element 06 to form the incident light 41, and the incident light 41 is reflected and refracted on the surface of the optical element 06 to obtain the reflected light 43 and the refracted light 42.
  • the refracted ray 42 is reflected and refracted on the second surface 321 provided with the anti-reflection film to obtain reflected light 44 and refracted light 45.
  • the refracted ray 45 is performed coarse.
  • the roughened first surface 320 is diffusely reflected, and the reflected light formed by the diffuse reflection does not form a clear ghost image.
  • the reflected ray 43 is received by the first eyepiece 40 such that the first eyepiece 40 receives the reflected ray 43 while avoiding ghosting.
  • the image of the second screen 20 is viewed through the first eyepiece 40, a part of the light incident from the second screen 20 is blocked due to the rough processing performed on the surface of the optical element 06, so that the polarizing plate of the first eyepiece 40 is concentrated and filtered. Light incident on the first eyepiece 40 in other directions completely eliminates the afterimage of the second screen 20.
  • the above roughening treatment may include: a sanding treatment.
  • the matte treatment can be uniform frosting or non-uniform frosting.
  • the matte treatment includes at least one of the following: sandblasting, sanding, engraving, laser engraving, chemical etching.
  • the above roughening treatment includes: applying a matte matte film.
  • the thickness of the matte matte film is not specifically limited in the present invention as long as it does not affect the ghosting and afterimage of the present invention.
  • the thickness of the anti-reflection film is related to the light emitted by the first screen or the second screen. Variations in the angle of incidence formed between the optical elements to eliminate ghosting caused by multiple reflections or transmissions of light by the optical elements.
  • the thickness of the anti-reflection film is between the light emitted from the first screen or the second screen and the optical element The angle of incidence formed exhibits a gradient change.
  • the surface of the optical element 06 is divided into a plurality of regions from the first screen to the first screen, and each region is plated with an antireflection film of the same thickness.
  • the thickness of the anti-reflection film is between the light emitted from the first screen or the second screen and the optical element The angle of incidence formed exhibits a gradual change.
  • the surface of the optical element 06 is divided into a plurality of regions from the first screen to the first screen, and each region is plated with an antireflection film of the same thickness.
  • the other surface of the optical element 60 opposite to the antireflection film is provided with a transflective film, and the transflective film is used for reflecting light when the light passes through.
  • the phase difference between the P component and the S component is close to 0° or close to 180°, or the phase difference between the P component and the S component of the transmitted light is close to 0° or close to 180°; wherein the P component is parallel to the incident surface and the S component is perpendicular to Incident surface.
  • the first eyepiece 40 and the second eyepiece 50 are respectively disposed on the surface of the optical element 60 with a wave plate for causing a reverse phase difference between the light incident on the wave plate. Plus to reduce the residual image.

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Abstract

一种穿戴式设备（100）和无人机***（200）。穿戴式设备（100）的光学元件（30,06）的表面指定部分被执行用于引起漫反射的粗糙处理，即使在光学元件（30,06）的前表面透射向光学元件（30,06）后表面的光线的入射角接近全反射角，但因为光学元件（30,06）的后表面执行了粗糙处理，光线在执行了粗糙处理的表面发生漫反射，漫反射不会形成一个清晰的重影的像，避免了发生重影。进一步地，因为光学元件（30,06）表面执行的粗糙处理，会阻挡一部分从第二屏幕（20）入射至第一目镜（40）的光、从第一屏幕（10）入射至第二目镜（50）的光，彻底消除第二屏幕（20）、第一屏幕（10）的残影。

Description

穿戴式设备和无人机*** 技术领域
本发明涉及虚拟现实领域，尤其涉及穿戴式设备和无人机***。
背景技术
虚拟现实技术是一种可以创建和体验虚拟世界的计算机仿真***，它利用计算机生成一种模拟环境，是一种多源信息融合的、交互式的三维动态视景和实体行为的***仿真以使用户沉浸到该环境中。
随着虚拟现实技术的发展，目前出现了很多应用于虚拟现实的穿戴式设备。但是，这些穿戴式设备因为其中的光学元件多次反射不可避免出现重影，影响图像显示效果。
发明内容
本发明提供穿戴式设备和无人机***，以避免重影，并消除残影。
本发明提供的技术方案包括：
一种穿戴显示设备，包括：呈角度设置的第一屏幕和第二屏幕、与所述第一屏幕对应的第一目镜、以及与所述第二屏幕对应的第二目镜，其关键在于，所述设备还包括：一机身、以及设置在所述第一屏幕与所述第二屏幕之间的光学元件；
所述光学元件的表面指定部分被执行用于引起漫反射的粗糙处理，以使射向所述指定部分的光发生漫反射；
所述机身承载了所述第一屏幕、所述第二屏幕、所述光学元件、所述第一目镜、及所述第二目镜。
一种无人机***，其包括：穿戴显示设备及无人飞行器，所述无人飞行器包括用于以无人飞行器第一视角拍摄画面的摄像模块，所述摄像模块通信连接于所述穿戴显示设备，所述穿戴设备包括如上述的可穿戴显示设备。
由以上本发明实施例提供的技术方案可见，即使在光学元件的前表面透射向光学元件后表面的光线的入射角接近全反射角，但因为光学元件的后表面执行了粗糙处理，光线在执行了粗糙处理的表面发生漫反射，漫反射不会形成一个清晰的重影的像，避免了发生重影。
进一步地，因为光学元件表面执行的粗糙处理，会阻挡一部分从第二屏幕入射至第一目镜的光、从第一屏幕入射至第二目镜的光，彻底消除第二屏幕、第一屏幕的残影。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本发明一实施例提供的一种无人机***200的结构示意图；
图2为本发明一实施例提供的穿戴设备100的结构示意图；
图3为本发明提供的第一屏幕发出的光线入射至光学元件的光路图；
图4为本发明提供的第二屏幕发出的光线入射至光学元件的光路图；
图5为本发明提供的另一穿戴设备100的结构示意图；
图6为本发明第五实施例提供的穿戴式设备结构图；
图7为本发明第五实施例提供的进行粗糙处理的指定部分结构示意图；
图8为本发明第五实施例提供的进行粗糙处理的指定部分另一结构示意图；
图9为本发明提供的穿戴式设备的原理示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。另外，在不冲突的情况下，下述的实施例及实施例中的特征可以相互组合。
第一实施例：
参见图1，图1为本发明一实施例提供的一种无人机***200的结构示意图。无人机***200包括穿戴显示设备100，及无人飞行器110，该无人飞行器110上设置有用于以无人飞行器第一视角拍摄画面的摄像模块(图未示)。图1中以四旋翼飞行器对无人飞行器110进行示例，可理解的是，无人飞行器110也可以是除四旋翼飞行器以外的其他无人飞行器。摄像 模块通信连接于可穿戴显示设备100。可穿戴设备100包括：第一屏幕10、第二屏幕20、光学元件30、第一目镜40、第二目镜50、第一遮光件60与第二遮光件70。图2示出了可穿戴设备100的结构(图2中因第二遮光件70设置在第二屏幕20的背离光学元件30的表面而未示出)。
在本实施方式中，摄像模块用于以无人飞行器第一视角拍摄画面，并将图像数据发送给穿戴显示设备100。第一屏幕10与第二屏幕20可以用于呈现所述摄像模块拍摄的画面。
在本实施方式中，第一屏幕10与第二屏幕20可以为OLED显示屏、等离子显示器或液晶显示器等中。第一屏幕10与第二屏幕20各自连接一音视频播放装置或者连接于同一音视频播放装置，也即第一屏幕10与第二屏幕20可以呈现相同的音视频，也可以呈现不同的音视频。
在本实施方式中，第一屏幕10与第二屏幕20呈预定角度设置。
作为一个实施例，第一屏幕10与第二屏幕20可垂直设置。图1以第一屏幕10与第二屏幕20垂直设置举例示意。如图1所示，第一屏幕10位于水平方向，第二屏幕20位于竖直方向。需要说明的是，第一屏幕10、第二屏幕的位置也可互换，比如，第一屏幕位于竖直方向，第二屏幕20位于水平方向。
在本实施方式中，光学元件30可实现光线的部分透射部分反射。作为一个实施例，光学元件30朝向第一屏幕10的平面上镀设有半透半反膜，以实现光线的部分透射部分反射。光学元件30具体实现时可为半透半反镜片，或者其他实现光线的部分透射部分反射的光学元件等，本发明并步具体限定。
在本实施方式中，光学元件30设有的上述半透半反膜(图1未示)，用于在光线通过时，使反射光的P分量(平行于入射面)和S分量(垂直于入射面)的相位差接近0°或接近180°，或透射光的P分量和S分量的相位差接近0°或接近180°，从而消除由于光线的偏振而被一个目镜接受到本该进入另外一个目镜的图像而造成的影像残影现象。
在本实施方式中，光学元件30设置在第一屏幕10与第二屏幕20之间。图1以光学元件30设置在第一屏幕10与第二屏幕20的角平分线的位置为例示意。
在本实施方式中，光学元件30朝向第二屏幕20的平面上镀设有增透膜32，增透膜32用于消除因光线在所述光学元件30中的多次反射或者多次透射导致的重影。在本实施方式中，增透膜32和半反半透膜在光学元件30的位置可以更换。
在本实施方式中，增透膜32的厚度随着第一屏幕10或者第二屏幕20发出、入射至所述 光学元件30的入射光线与所述光学元件30之间形成的入射角θ的变化而变化。
理想状态下，增透膜的厚度是λ/4n便可以使增透膜的上下两个表面的反射光就可以产生相消干涉，但是λ/4n这样一个厚度是针对某种色光垂直入射至增透膜的情况，实际情况下，如图1所示，从第一屏幕10或者第二屏幕20入射至增透膜32的入射光线41与增透膜32之间形成的入射角是是介于0度～90度之间的不确定的一个数值，所以，要想将该些不垂直增透膜32表面的入射光线在增透膜32的上下两个表面产生的反射光线产生相消干涉，则是设计镀设在所述光学元件30表面的增透膜32的厚度及材料，使增透膜32的厚度随着第一屏幕10或者第二屏幕20二者之一出射的光线与所述光学元件30之间形成的入射角的变化而变化，使不同的入射角对应不同厚度的增透膜32，进而使每一个入射光线在增透膜32的上下两个表面产生的反射光线相消干涉，从而减少甚至消除光学元件30与增透膜32之间界面的反射光，而解决穿戴显示设备100的残影现象。
从图1所示的侧视图中可以看出，从第一屏幕10竖直出射的那根入射光线与光学元件30形成的入射角是45度，其它两根入射光线与光学元件30形成的入射角是大于45度，入射角越大，在增透膜32中传输时，光程差(nλ,n为折射率，λ为波长)就越大，所以，为了弥补光程差，在入射角大的位置镀较薄的增透膜，在入射角较小的位置镀较厚的增透膜32。
在本实施方式中，第一目镜40设置在第一屏幕10的出射光线经过光学元件30反射之后的出光光路上，第二目镜50设置在第二屏幕20的出射光线经过光学元件30透射之后的出光光路上。第一目镜40及第二目镜50在靠近光学元件30的表面上分别设置有偏振片401，偏振片401可以旋转，偏振片401经旋转调整后用于接收入射至其表面的线偏振光而过滤掉其他方向的偏振光。偏振片401是为了使第一目镜40只接受第一屏幕10的线偏振光，第二目镜50只接受第二屏幕20的线偏振光。在另一实施方式中，也可以在第一目镜40及第二目镜50靠近光学元件30的表面上分别设置波片，波片用于使入射至波片的光线产生反向的相位差，以消减残留影像。
在本实施方式中，第一遮光件60设置在第一屏幕10的背离光学元件30的表面，第二遮光件70设置在第二屏幕20的背离光学元件30的表面，第一遮光件60及第二遮光件70分别用于阻挡外界环境的光线投射到第一屏幕10和第二屏幕20上。遮光件作为一个实施例可为透光率可调件。
至此，完成图1所示无人机***200、以及无人机***200中穿戴设备100的结构描述。
应用于第一实施例，下面描述穿戴式显示设备100的工作原理。当然，本发明中的穿戴 式显示设备100并不局限于应用在无人机***内。
参见图3，图3为本发明提供的第一屏幕发出的光线入射至光学元件的光路图。如图3所示，第一屏幕10出射的光线先入射至光学元件30形成入射光线41，入射光线41在光学元件30表面发生反射及折射，得到反射光线43及折射光线42。折射光线42在增透膜32的第二表面321反射及折射，得到反射光线44及折射光线45。折射光线45在增透膜32的第一表面320发生反射与折射，得到反射光线47及折射光线46，增透膜32第二表面321的反射光线44与第一表面320的反射光线47发生干涉相消，就剩下反射光线43及折射光线46，反射光线43被第一目镜40接收，折射光线从光学元件30中出射而不被利用。如此，第一目镜40就接收到反射光线43，而避免了发生重影。
再参见图4，图4为本发明提供的第二屏幕发出的光线入射至光学元件的光路图。如图4所示，第二屏幕20发出的光线先入射至增透膜32形成入射光线51，入射光线51在增透膜32的第一表面320发生反射及折射，得到折射光线52及反射光线53，折射光线52在增透膜32的第二表面321发生反射及折射，得到反射光线54及折射光线56，折射光线56在光学元件30的表面发生反射及折射，得到反射光线57及折射光线58，反射光线57在光学元件30与增透膜32接触的表面再次发生反射与折射，得到反射光线61及折射光线59，折射光线59在第一表面320处发生反射，得到反射光线62，由于第二目镜50位于与第二屏幕20相对侧，所以第二目镜50只能接收从光学元件30透射出去的光线，从而，从第一表面320出射的光线，譬如反射光线53就不会被第二目镜50接收，这部分光线将不被利用。在增透膜32第一表面320及第二表面321上产生的反射光线61、62发生干涉相消，从而，第二目镜50只接收折射光线58，而避免了进入眼睛的图像发生重影。
至此，完成第一实施例的描述。
第二实施例：
第二实施例与第一实施例基本相同，其不同之处在于，第二实施例的穿戴设备300不包括第一遮光件60与第二遮光件70，而是包括一个固定框90。图5示出了穿戴设备300的结构。
固定框90包括平行相对的第一边框91与第二边框92以及垂直连接第一边框91与第二边框92的第三边框93，第一屏幕10设置在第一边框91的内壁，第二屏幕20设置在第三边框的内壁93，光学元件30设置在第一边框91与第三边框93所形成的角平分线的位置且抵靠在第二边框92。观众佩戴穿戴设备300时，可以为观众呈现具立体效果的视频图像。
至此，完成第二实施例的描述。
第三实施例：
第三实施例与第一实施例基本相同，其不同之处在于，将光学元件30的表面从靠近第一屏幕10到远离第一屏幕10分为多个区域，每个区域的面积可以相等也可以不等，使每个区域镀设同一个厚度的增透膜32，从而使增透膜32的厚度呈现梯度变化。
至此，完成第三实施例的描述。
第四实施例：
第四实施例与第一实施例基本相同，其不同之处在于，将光学元件30的表面从靠近第一屏幕10到远离第一屏幕10分为多个区域，每个区域镀设同一个厚度的增透膜32。使增透膜32的厚度呈现渐变变化。
至此，完成第四实施例的描述。
综上所述，本发明提供的穿戴显示设备比如上述的穿戴显示设备100、300，通过在光学元件30其中一个表面镀设的增透膜32，利用增透膜32将入射至增透膜32第一表面320、第二表面321的反射光线相干涉抵消，使第一目镜40仅接收反射光线，第二目镜50接收从光学元件30中透射的折射光线，解决了可穿戴显示设备在穿戴时所造成的重影现象，使穿戴显示设备在观看图像时图像更为真实、清楚。
在实际应用中，光学元件30增透膜的透过率不可能达到100％，并且，第一屏幕发出的射向光学元件30的后表面的入射角接近全反射角，反射率会显著增高，单纯地依赖增透膜并不能完全消除重影，第一目镜40的重影相比第二目镜50会很严重。
进一步地，如上描述，即使第一目镜40及第二目镜50在靠近光学元件30的表面上分别设置有偏振片401，以接收入射至其表面的线偏振光而过滤掉其他方向的偏振光，但是，其是无法完全消除一个面型偏振光，经常会出现第一目镜40看到第二屏幕20的残影，以及第二目镜50看到第一屏幕10的残影。
基于此，本发明还提供了另一种穿戴式设备。具体参见第五实施例。
第五实施例：
参见图6，图6为本发明第五实施例提供的穿戴式设备结构图。如图6所示的穿戴式设备可包括：呈角度设置的第一屏幕10和第二屏幕20、与第一屏幕10对应的第一目镜40、以及与第二屏幕20对应的第二目镜50。其中，第一屏幕10、第二屏幕20、第一目镜40、第二目 镜50均如第一实施例描述描述，这里暂不赘述。
其关键在于，本实施方式中，穿戴式设备还包括：一机身600、以及设置在第一屏幕10与第二屏幕20之间的光学元件06。
本实施方式中的光学元件06不同于上述第一实施例中的光学元件30。本实施方式中的光学元件06的表面指定部分被执行用于引起漫反射的粗糙处理，以使射向指定部分的光发生漫反射。
本实施方式中的机身600承载了第一屏幕10、第二屏幕20、光学元件06、第一目镜40、及第二目镜50。
作为一个实施例，本实施方式中的光学元件06可为：上述光学元件30在设有增透膜的表面的指定部分被执行用于引起漫反射的粗糙处理后得到的。这里之所以对指定部分进行粗糙处理，目的是使射向指定部分的光发生漫反射。
作为一个实施例，第一屏幕10、第二屏幕20相互垂直。
作为一个实施例，第一屏幕10位于水平方向，第二屏幕20位于竖直方向。光学元件06上进行粗糙处理的指定部分位于光学元件06朝向第二屏幕20的表面上除第二屏幕成像区域之外的区域。图7举例示出了进行粗糙处理的指定部分。具体地，作为一个实施例，光学元件06上进行粗糙处理的指定部分可为：位于光学元件06朝向第二屏幕20的表面上除第二屏幕成像区域之外且属于第一屏幕成像区域的区域。图8示出了进行粗糙处理的指定部分。
作为另一个实施例，第一屏幕10位于竖直方向，第二屏幕20位于水平方向。光学元件06上进行粗糙处理的指定部分位于光学元件06朝向第一屏幕10的表面上除第一屏幕成像区域之外的区域，这类似上述的图7，不再通过附图示意。具体地，作为一个实施例，光学元件06上进行粗糙处理的指定部分可为：位于所述光学元件朝向第一屏幕的表面上除第一屏幕成像区域之外的部分且属于第二屏幕成像区域的区域。这类似上述的图8，不再通过附图示意。
下面描述图6所示的穿戴式设备的原理：
参见图9，图9为本发明提供的穿戴式设备的原理图。如图9所示，第一屏幕10出射的光线先入射至光学元件06形成入射光线41，入射光线41在光学元件06表面发生反射及折射，得到反射光线43及折射光线42。折射光线42在设有增透膜的第二表面321反射及折射，得到反射光线44及折射光线45。即使折射光线45射向增透膜32的第一表面320的入射角接近全反射角，但因为增透膜32的第一表面320执行了粗糙处理，折射光线45在执行了粗 糙处理的第一表面320发生漫反射，漫反射形成的反射光线不会形成一个清晰的重影的像。反射光线43被第一目镜40接收，如此，第一目镜40就接收到反射光线43，而避免了发生重影。并且，当透过第一目镜40观看第二屏幕20的像时，因为光学元件06表面执行的粗糙处理，会阻挡一部分从第二屏幕20入射的光，使得第一目镜40的偏振片集中过滤其他方向入射至第一目镜40的光，彻底消除第二屏幕20的残影。
在本发明中，作为一个实施例，上述的粗糙处理可包括：磨砂处理。
其中，磨砂处理可为均匀磨砂，也可为非均匀磨砂。
磨砂处理包括以下至少一种：喷砂、打磨、精雕、激光雕刻、化学腐蚀。
在本发明中，作为另一个实施例，上述的粗糙处理包括：贴磨砂亚光薄膜。磨砂亚光薄膜的厚度本发明并不具体限定，只要不影响本发明的消除重影和残影即可。
本实施方式中，当光学表面06的表面设有增透膜，则作为一个实施例，如第一实施例描述的，增透膜的厚度随着第一屏幕或者第二屏幕出射的光线与所述光学元件之间形成的入射角的变化而变化，以消除光学元件对光线的多次反射或者透射造成的重影。
作为另一个实施例，当光学表面06的表面设有增透膜，如第三实施例描述的，增透膜的厚度随着第一屏幕或者第二屏幕出射的光线与所述光学元件之间形成的入射角呈现梯度变化。其中，光学元件06的表面从靠近第一屏幕到远离第一屏幕分为多个区域，每个区域镀设同一个厚度的增透膜。
作为另一个实施例，当光学表面06的表面设有增透膜，如第四实施例描述的，增透膜的厚度随着第一屏幕或者第二屏幕出射的光线与所述光学元件之间形成的入射角呈现渐变变化。其中，光学元件06的表面从靠近第一屏幕到远离第一屏幕分为多个区域，每个区域镀设同一个厚度的增透膜。
另外，本实施方式中，作为一个实施例，光学元件60上与增透膜相背对的另外一个表面设有半透半反膜，半透半反膜用于在光线通过时，使反射光的P分量和S分量的相位差接近0°或接近180°，或透射光的P分量和S分量的相位差接近0°或接近180°；其中，P分量平行于入射面，S分量垂直于入射面。
本实施方式中，作为一个实施例，第一目镜40及第二目镜50靠近光学元件60的表面上分别设置有波片，波片用于使入射至波片的光线产生反向的相位差，再加上以消减残留影像。
至此，完成第五实施例的描述。
本说明书中的各个实施例均采用递进的方式描述，各个实施例之间相同相似的部分互相参见即可，每个实施例重点说明的都是与其他实施例的不同之处。
需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上所述仅为本申请的实施例而已，并不用于限制本申请。对于本领域技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原理之内所作的任何修改、等同替换、改进等，均应包含在本申请的权利要求范围之内。

Claims (16)

  1. 一种穿戴显示设备，包括：呈角度设置的第一屏幕和第二屏幕、与所述第一屏幕对应的第一目镜、以及与所述第二屏幕对应的第二目镜，其特征在于，所述设备还包括：一机身、以及设置在所述第一屏幕与所述第二屏幕之间的光学元件；
    所述光学元件的表面指定部分被执行用于引起漫反射的粗糙处理，以使射向所述指定部分的光发生漫反射；
    所述机身承载了所述第一屏幕、所述第二屏幕、所述光学元件、所述第一目镜、及所述第二目镜。
  2. 根据权利要求1所述的设备，其特征在于，所述指定部分为所述光学元件的设有增透膜的表面上的指定部分。
  3. 根据权利要求2所述的设备，其特征在于，所述增透膜的厚度随着第一屏幕或者第二屏幕出射的光线与所述光学元件之间形成的入射角的变化而变化，以消除光学元件对光线的多次反射或者透射造成的重影。
  4. 根据权利要求2所述的设备，其特征在于，所述光学元件的表面从靠近第一屏幕到远离第一屏幕分为多个区域，每个区域镀设同一个厚度的增透膜，使所述增透膜的厚度随着第一屏幕或者第二屏幕二者之一出射的光线与所述光学元件之间形成的入射角呈现梯度变化。
  5. 根据权利要求2所述的设备，其特征在于，所述光学元件的表面从靠近第一屏幕到远离第一屏幕分为多个区域，每个区域镀设同一个厚度的增透膜，使所述增透膜的厚度随着第一屏幕或者第二屏幕二者之一出射的光线与所述光学元件之间形成的入射角呈现渐变变化。
  6. 根据权利要求2所述的设备，其特征在于，所述光学元件上与所述增透膜相背对的另外一个表面设有半透半反膜，所述半透半反膜用于在光线通过时，使反射光的P分量和S分量的相位差接近0°或接近180°，或透射光的P分量和S分量的相位差接近0°或接近180°；其中，P分量平行于入射面，S分量垂直于入射面。
  7. 根据权利要求2所述的设备，其特征在于，所述第一目镜及第二目镜靠近所述光学元件的表面上分别设置有波片，所述波片用于使入射至波片的光线产生反向的相位差，以消减残留影像。
  8. 根据权利要求1所述的设备，其特征在于，所述第二屏幕、第一屏幕相互垂直；
    所述指定部分位于所述光学元件朝向第二屏幕的表面上除第二屏幕成像区域之外的区域。
  9. 根据权利要求1所述的设备，其特征在于，所述第二屏幕、第一屏幕相互垂直；
    所述指定部分位于所述光学元件朝向第二屏幕的表面上除第二屏幕成像区域之外且属于第一屏幕成像区域的区域。
  10. 根据权利要求1所述的设备，其特征在于，所述第二屏幕、第一屏幕相互垂直；
    所述指定部分位于所述光学元件朝向第一屏幕的表面上除第一屏幕成像区域之外的区域。
  11. 根据权利要求1所述的设备，其特征在于，所述第二屏幕、第一屏幕相互垂直；
    所述指定部分位于所述光学元件朝向第一屏幕的表面上除第一屏幕成像区域之外的部分且属于第二屏幕成像区域的区域。
  12. 根据权利要求1所述的设备，其特征在于，所述粗糙处理包括：磨砂处理。
  13. 根据权利要求12所述的设备，其特征在于，所述磨砂处理为均匀磨砂或非均匀磨砂。
  14. 根据权利要求13所述的设备，其特征在于，所述磨砂处理包括以下至少一种：
    喷砂、打磨、精雕、激光雕刻、化学腐蚀。
  15. 根据权利要求1所述的设备，其特征在于，所述粗糙处理包括：
    贴磨砂亚光薄膜。
  16. 一种无人机***，其包括：穿戴显示设备及无人飞行器，所述无人飞行器包括用于以无人飞行器第一视角拍摄画面的摄像模块，所述摄像模块通信连接于所述穿戴显示设备，所述穿戴设备包括如权利要求1至15任一项所述的可穿戴显示设备。
PCT/CN2017/080452 2016-09-29 2017-04-13 穿戴式设备和无人机*** WO2018058938A1 (zh)

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