WO2017113192A1 - 头戴式显示设备 - Google Patents

头戴式显示设备 Download PDF

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Publication number
WO2017113192A1
WO2017113192A1 PCT/CN2015/099873 CN2015099873W WO2017113192A1 WO 2017113192 A1 WO2017113192 A1 WO 2017113192A1 CN 2015099873 W CN2015099873 W CN 2015099873W WO 2017113192 A1 WO2017113192 A1 WO 2017113192A1
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WO
WIPO (PCT)
Prior art keywords
liquid
mounted display
display device
elastic film
head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2015/099873
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English (en)
French (fr)
Inventor
施宏艳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Royole Technologies Co Ltd
Original Assignee
Shenzhen Royole Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Royole Technologies Co Ltd filed Critical Shenzhen Royole Technologies Co Ltd
Priority to CN201580076875.2A priority Critical patent/CN107407806A/zh
Priority to US15/768,680 priority patent/US20180307043A1/en
Priority to PCT/CN2015/099873 priority patent/WO2017113192A1/zh
Publication of WO2017113192A1 publication Critical patent/WO2017113192A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G02B27/01—Head-up displays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/12—Fluid-filled or evacuated lenses
    • G02B3/14—Fluid-filled or evacuated lenses of variable focal length
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C5/00—Constructions of non-optical parts
    • G02C5/02—Bridges; Browbars; Intermediate bars
    • G02C5/04—Bridges; Browbars; Intermediate bars with adjustable means
    • 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
    • G02B2027/011—Head-up displays characterised by optical features comprising device for correcting geometrical aberrations, distortion
    • 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
    • G02B2027/0178—Eyeglass type
    • 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
    • G02B27/0179—Display position adjusting means not related to the information to be displayed
    • G02B2027/0181—Adaptation to the pilot/driver
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/08—Auxiliary lenses; Arrangements for varying focal length

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a head mounted display device.
  • Existing head-mounted display devices are usually designed according to the normal eyes of most users, so if the user has diopter problems, such as myopia or hyperopia, the display image of the display screen in the head-mounted display device cannot be directly and clearly Imaging on the user's retina, that is, the display image of the head-mounted display device viewed by the user may be blurred.
  • the current technology generally adopts two schemes: 1. After wearing the glasses, the user wears a head-mounted display device for viewing; 2. Redesigns the display optical system in the head-mounted display device by changing The focal length or the distance from the lens to the display allows the head mounted display to have a limited focus range.
  • the glasses increase the pressure on the bridge of the nose, and the user feels comfortable.
  • most of the head-mounted display devices are now immersive head-mounted display devices, that is, their display components are fully enclosed.
  • the image imaging environment if the user wears glasses to watch, it is easy to cause light leakage in the imaging environment, which directly reduces the image display quality of the display component.
  • the display optical system of the head-mounted display device is usually extremely precise design, it is extremely difficult to change the design; furthermore, even if the modification is implemented, the structure of the head-mounted display device is more likely to be made. Complexity, increased volume, and in turn will limit the adjustment of diopter, it is difficult to meet the needs of users. Therefore, the existing head-mounted display device is greatly limited in its use range in the case where the above problem cannot be solved.
  • Embodiments of the present invention provide a versatile head mounted display device.
  • a head mounted display device includes a housing and a display, an optical assembly, and a focusing assembly disposed within the housing, the housing including a pair of spaced viewing windows, the focusing assembly including a pair a liquid lens disposed in one-to-one correspondence with the viewing window;
  • Each of the liquid lenses includes a see-through component, the see-through component including a housing within the housing Forming a liquid cavity, the outer casing includes an elastic film disposed opposite to the viewing window, and the display light source provided by the display sequentially projects through the optical component and the elastic film to a direction of the exit pupil;
  • Each of the liquid lenses further includes a liquid storage member and a liquid driving member, a liquid storage chamber is formed in the liquid storage member, and the liquid chamber and the liquid storage chamber are electrically connected through a communication tube,
  • the liquid driving member drives the liquid in the liquid lens to flow between the liquid chamber and the liquid storage chamber such that the elastic film is convex, planar or concave.
  • the head mounted display device of the embodiment of the present invention can drive the liquid to flow between the liquid chamber and the liquid storage chamber by the liquid driving member, thereby making the
  • the elastic film is switched between convex, planar or concave, and the see-through member correspondingly forms a convex lens, a plane mirror or a concave lens.
  • the display light source provided by the display sequentially passes through the optical component and the elastic film (that is, after passing through the see-through component), the focal length of the light is reduced, constant or increased, thereby satisfying the normal eye user.
  • the technical problem that the display image in the head-mounted display device is blurred by the user in the abnormal eye for example, myopia or hyperopia
  • the head-mounted display device of the embodiment can be Applicable to most users, versatile.
  • the head-mounted display device of the embodiment does not need to redesign the optical component in the housing, which avoids waste and cost of the head-mounted display device space. Improvement.
  • FIG. 1 is a schematic structural diagram of a head-mounted display device according to an embodiment of the present invention.
  • FIG. 2 is another schematic structural diagram of a head mounted display device according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a liquid lens of a head mounted display device according to an embodiment of the present invention.
  • FIG. 4 is a schematic view showing another structure of the liquid lens of FIG. 3.
  • FIG. 5 is a schematic view showing still another structure of the liquid lens of FIG. 3.
  • FIG. 5 is a schematic view showing still another structure of the liquid lens of FIG. 3.
  • FIG. 6 is a perspective view of a liquid lens of a head mounted display device according to an embodiment of the present invention. Schematic diagram of the structure of the component.
  • FIG. 7 is a schematic structural diagram of a distance adjusting device of a head mounted display device according to an embodiment of the present invention.
  • FIG. 8 is another schematic structural view of the distance adjusting device of FIG. 7.
  • FIG. 8 is another schematic structural view of the distance adjusting device of FIG. 7.
  • FIG. 9 is a schematic structural diagram of another distance adjusting device of a head mounted display device according to an embodiment of the present invention.
  • an embodiment of the present invention provides a head-mounted display device.
  • an embodiment of the present invention uses an immersive display device as an example for description.
  • the head mounted display device includes a housing 22 and an optical assembly 23 and a focusing assembly 21 disposed within the housing 22, the housing 22 including a pair of spaced viewing viewing windows 221 including a pair of viewing windows 221 One-to-one correspondingly disposed liquid lenses 211.
  • the liquid lens 221 is filled with a liquid.
  • Each liquid lens 211 includes a see-through member 211a that includes a housing 2115 in which a liquid cavity 211a' is formed, and the housing 2115 includes an elastic film 2113 disposed opposite the viewing window 221. As shown in FIG.
  • the arrow harness represents light
  • the head mounted display device includes a display that provides a display light source that is projected by the optical component 23 through the elastic film 2113 and projected to the exit pupil direction.
  • the user's eye 3 corresponds to the optical exit pupil in the wearable display device, that is, the display source light is projected onto the user's eye 3.
  • the following will be illustrated by the user's eye 3.
  • each of the liquid lenses 211 further includes a liquid storage member 211c and a liquid driving member 211d.
  • the liquid storage chamber 211c is formed with a liquid storage chamber 211c', and the liquid chamber 211a' and the liquid storage chamber 211c' pass through.
  • the communication tube 211b is turned on, and the liquid driving member 211d is configured to drive the liquid in the liquid lens 211 to flow between the liquid chamber 211a' and the liquid storage chamber 211c', so that the elastic film 2113 is convex, planar or concave.
  • the edge of the liquid cavity 211a' has a first thickness t
  • the middle of the liquid chamber 211a' has a second thickness T.
  • the liquid storage member 211c is set as a liquid storage cylinder
  • the liquid drive member 211d includes a piston 211d' provided in the liquid storage cylinder, and the liquid drive member 211d is connected to the drive piston 211d' via a link.
  • the elastic film 2113 is planar, the second thickness T is equal to the first thickness t, and the see-through member 221a forms a plane mirror.
  • the focal length of the light does not change, making the head-mounted display device suitable for a normal-eye user.
  • the piston 211d' squeezes the liquid in the reservoir, causing the liquid to flow from the reservoir chamber 211c' to the liquid through the communication tube 211b.
  • the cavity 211a', the liquid pressure in the liquid chamber 211a' is greater than atmospheric pressure, thereby lifting the elastic film 2113, the elastic film 2113 is convex, the second thickness T is greater than the first thickness t, and the see-through member 221a forms a convex lens.
  • the piston 211d' sucks out the liquid in the liquid chamber 211a', causing the liquid to flow from the liquid chamber 211a' through the communication tube 211b.
  • the liquid pressure in the liquid chamber 211a' is less than atmospheric pressure
  • the atmospheric pressure depresses the elastic film 2113
  • the elastic film 2113 is concave
  • the second thickness T is smaller than the first thickness t
  • the see-through member 221a forms a concave lens.
  • the head-mounted display device of the present embodiment can drive the liquid to flow between the liquid chamber 211a' and the liquid storage chamber 211c' through the liquid driving member 211d, so that the elastic film is convex, planar or inner.
  • the see-through member 211a correspondingly forms a convex lens, a plane mirror or a concave lens.
  • the technical problem that the display image in the head-mounted display device is blurred by the user who has the diopter problem is also solved, so the head-mounted display device of the embodiment can be applied to most of the problems.
  • User versatility.
  • the head mounted display device of the present embodiment does not need to modify the optical component 23 in the housing 22 relative to the prior art.
  • the diopter adjustment is achieved, for example, by changing the distance between the display and the optical assembly 23, thereby avoiding an increase in the volume of the head mounted display device due to the distance adjustment.
  • the liquid chamber 211a' may be directly connected to the air pump through the communication tube, and the air pump may supplement the gas or extract the gas to the liquid chamber 211a' to change the inside of the liquid chamber 211a'.
  • the pressure difference from the outside is thereby controlled to control the protrusion or depression of the elastic film 2113.
  • the liquid chamber 211a' is simultaneously filled with a liquid and a gas.
  • the gas in the liquid chamber 211a' expands, the pressure rises, causing the elastic film 2113 to bulge; if the internal temperature of the liquid chamber 211a' is lowered, the liquid The volume of the gas in the cavity 211a' is reduced, and the pressure is lowered to dent the surface of the elastic film 2113. That is, the shape of the elastic film 2113 can be flexibly controlled by controlling the internal temperature of the liquid chamber 211a'.
  • the see-through member 221a which varies within the above range has an optimum light focusing effect.
  • the outer casing 2115 includes a first face 2112 disposed away from the viewing window 211, and an elastic film 2113 is disposed in a central region of the first face 2112. Further, the outer casing 2115 further includes a rigid transparent frame 2114, and the elastic film 2113 and the rigid transparent frame 2114 are connected and collectively surround the liquid cavity 211a'.
  • the rigid transparent frame 2114 is not deformed, so that the user's eyes can better approach the viewing window 211 to reduce the risk of external light affecting the viewing visual effect, and ensure high quality display of the head mounted display device. .
  • the rigid transparent frame 2114 does not deform during the focusing of the see-through member 211a, ensuring the accuracy of focusing of the see-through member 211a.
  • the elastic film 2113 and the rigid transparent frame 2114 are made of a material that does not change the direction of light propagation. Further, the elastic film 2113 is not limited to being a film layer structure as long as it has a structure having a certain elastic deformation.
  • the elastic film 2113 and the rigid transparent frame 2114 may be formed into an outer casing 2115 by an assembly process, or may be integrally formed.
  • the outer casing 2115 includes a first surface 2112 and a second surface 2111 disposed opposite to each other.
  • the first surface 2111 faces away from the viewing window 211
  • the second surface 2112 faces the viewing window 211.
  • the elastic film 2113 includes a first elastic film and a second elastic film, and the first elastic film and the second elastic film are disposed on the first surface 2112 and the second surface 2111, respectively.
  • the outer casing 2115 further includes a rigid transparent frame 2114, and the elastic film 2113 and the rigid transparent frame 2114 are connected and collectively surround the liquid cavity 211a'.
  • the rigid transparent frame 2114 is not deformed, so that the user's eyes can better approach the viewing window to reduce the risk of external light affecting the viewing visual effect, and to ensure high quality display of the head mounted display device.
  • the embodiment additionally occupies a part of the space of the head-mounted display device, the focusing range of the see-through member 211a is made wider, and the head-mounted display device can be applied to more users.
  • the area of the first elastic film is greater than or equal to 1/2 of the area of the first surface 2112.
  • the area of the first elastic film is greater than or equal to 2/3 of the area of the first surface 2112
  • the optimal first elasticity is The area of the film is equal to the area of the first surface 2112; further, the area of the second elastic film is greater than or equal to 1/2 of the area of the second surface 2111, and preferably, the area of the second elastic film is greater than or equal to 2/3 of the second
  • the area of the face 2111, the area of the optimum second elastic film is equal to the area of the second face 2111; at this time, the see-through member 211a has an optimum focus range.
  • the see-through member 211a is disposed inside the casing 22, so that the head-mounted display device has a neat and beautiful appearance.
  • the present invention also intends to protect a see-through member 211a from the outside of the casing 22, in which the see-through member 211a is detachably mounted near the viewing window 211 to cover the propagation path of the light source. Due to the detachable nature of the see-through member 211a, the head-mounted display device can be removed when the see-through member 211a is not required to alleviate the weight of the head-mounted display device.
  • the refractive index of the liquid in the liquid lens 211 is greater than 1, and when the refractive index of the liquid is larger, the liquid lens 211 has a larger range of focal length adjustment under the same adjustment action (that is, the diopter adjustment range is larger) ).
  • the liquid of the present embodiment is preferably one or more of carbon disulfide, benzene and oil, that is, the liquid may be a single liquid component or a combination of a plurality of liquid components.
  • the communication tube 211b may include a first communication tube and a second communication tube, and at this time, the liquid storage
  • the chamber 211c' may include a first reservoir chamber and a second reservoir chamber.
  • the first reservoir is connected to one end of the liquid chamber through a first communication tube
  • the second reservoir is connected to the other end of the liquid chamber 211a' through a second communication tube. That is, by providing two reservoir chambers and connecting to both ends of the liquid chamber 211a' through different communication tubes, it is possible to more flexibly adjust the amount of liquid filled in the liquid chamber 211a'.
  • the first communication tube may be an input tube
  • the second communication tube may be an output tube.
  • the liquid is only input from one end of the liquid chamber 211a' and is outputted from the other end, and independently controls the flow of the liquid in the liquid chamber 211a'.
  • the change in the elastic film 2113 is made more sensitive.
  • the distance between the pair of viewing windows 221 is generally set to be the same or similar to the user's pupil distance for the convenience of the user.
  • the see-through member 211a of the focusing member 21 covers the viewing window 21 so that the light emitted from the viewing window 21 can pass through the see-through member 211a and then enter the user's eye 3 to provide the user with a normal display image.
  • the see-through member 211a is completely disposed in the viewing window 221 to prevent external light from entering the light transmission path of the head-mounted display device 23 from the gap between the see-through member 211a and the viewing window 221, thereby interfering with the display effect of the head-mounted display device.
  • the head-mounted display device is an immersive display device, the fit setting is more important.
  • the light blocking member may be additionally provided to block external light.
  • the focusing assembly 21 further includes a distance adjusting device 212 for adjusting the distance between the see-through members 211a of the pair of liquid lenses 211 to make a pair of liquid lenses.
  • the distance between the centers of the elastic films 2113 of 211 is equal to the user's interpupillary distance, that is, the center of the elastic film 2113 can face the user's eyes 3, so that the display light received by the user's eyes 3 is optimally corrected, thereby Enables high-quality image display for head-mounted display devices.
  • the distance adjusting device 212 includes a sliding slot 2121 fixed to the housing 22, and the sliding rail of the sliding slot 2121 is from a viewing window 211. Extending to the other viewing window 211, a pair of see-through members 211a are slidably engaged in the chute 2121. In the present embodiment, the pair of see-through members 211a can be freely moved along the slide rails in the chute 2121, and can be manually or electrically controlled, thereby achieving the purpose of the distance adjusting device 212 adjusting the distance between the see-through members 211a.
  • the distance adjusting device 212 As another preferred embodiment of the present invention, please refer to FIG. 2 and FIG. 9 together, the distance adjusting device 212.
  • a first rod 2122 and a second rod 2123 including a threaded connection are provided, the first rod 2122 and the second rod 2123 being coupled to a pair of see-through members 211a, respectively.
  • the threaded first rod 2122 and the second rod 2123 can move relative to each other, so that the pair of see-through members 211a can be displaced from each other, thereby achieving the purpose of the distance adjusting device 212 adjusting the distance between the see-through members 211a.
  • the distance adjusting device includes both the first slot and the second rod with the chute and the threaded connection, and the chute
  • the first rod and the second rod are used to precisely adjust the pitch of the pair of see-through members 211a.
  • the center of the elastic film 2113 is disposed to be aligned with the center of the see-through member 211a.
  • the distance adjusting device 212 only needs to adjust the distance between the centers of the two see-through members 211a.
  • the pitch adjustment device 212 can be implemented in a variety of ways, as long as it is a structure capable of achieving distance adjustment, which is within the scope of the present invention.
  • the pitch adjustment device 212 includes, but is not limited to, a screw structure, a screw structure, and a gear structure.
  • the head mounted display device further includes a fixing assembly 1 including a first bracket 11 and a second bracket 12, the first bracket 11 being mounted on the user's face (usually the bridge of the nose and the eyes) In the vicinity, the second bracket 12 is placed on top of the user's head.
  • the housing 22 is fixed to the first bracket 11 to facilitate the user's eyes to directly view the light emitted by the optical component 23.
  • the see-through members 211a of each of the liquid lenses 211 are fixed to the casing 22, that is, the see-through members 211a are fixed to the first bracket 11, while the liquid storage member 211c and the liquid driving member 211d of each of the liquid lenses 211 are fixed at On the second bracket 12.
  • the first bracket 11 is generally mounted on the nose bridge of the user, and the second bracket 12 can be erected on the user's head. Therefore, if the first bracket 11 is used to support too many components, the nose bridge of the user will be It has a sense of oppression and is uncomfortable.
  • the head-mounted display device of the present embodiment fixes the see-through member 211a of the liquid lens 211 to the first holder 11, that is, the see-through member 211a is fixed to the first holder 11, and the liquid storage member 211c of the liquid lens 211 and the liquid driving member 211d are fixed.
  • the head mounted display device of the present invention may further include an audio component fixed to the second bracket 12, and the second bracket 12 includes a closed earmuff and a top mount, both of which can assist in fixing and supporting.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • General Health & Medical Sciences (AREA)

Abstract

一种头戴式显示设备，包括壳体（22）以及设置在壳体（22）内的显示器、光学组件（23）和调焦组件（21），壳体（22）包括一对间隔设置的观看视窗（221），调焦组件（21）包括一对与观看视窗（221）一一对应设置的液体透镜（211）；每个液体透镜（211）均包括透视部件（211a），透视部件（211a）包括外壳（2115），外壳（2115）内形成液体容腔（211a'），外壳（2115）包括正对观看视窗（221）设置的弹性膜（2113），显示器提供的显示光源依次通过光学组件（23）及弹性膜（2113）后投射至出瞳的方向；每个液体透镜（211）均还包括储液部件（211c）和液体驱动部件（211d），储液部件（211c）内形成有储液腔（211c' ），液体容腔（211a '）和储液腔（211c'）之间通过连通管（211b）导通，液体驱动部件（211d）驱动液体透镜（211）内的液体在液体容腔（211a' ）和储液腔（211c' ）之间流动，使弹性膜（2113）呈外凸状、平面状或内凹状。该头戴式显示设备通用性强，避免了空间浪费和成本提升。

Description

头戴式显示设备 技术领域
本发明涉及显示技术领域，特别涉及一种头戴式显示设备。
背景技术
现有头戴式显示设备通常依据大部分用户的正常眼进行设计，因此如果用户存在屈光度问题时，例如近视眼或者远视眼，头戴式显示设备内显示屏的显示图像无法直接地、清晰地在用户的视网膜上成像，也即用户所观看到头戴式显示设备的显示图像会模糊不清。为解决上述问题，目前技术通常采用两种方案：1、用户配戴眼镜后再配戴头戴式显示设备进行观看；2、对头戴式显示设备内的显示光学系统进行再设计，通过更改焦距或者更改镜头到显示屏的距离，使头戴式显示设备具有一个有限的调焦范围。
然而，采用方案1时，眼镜增加了鼻梁的压迫感，用户会明显地感到舒适；再者，现在大部分头戴式显示设备为沉浸式头戴式显示设备，也即其显示组件采用全封闭的图像成像环境，如果用户配戴眼镜后进行观看，容易造成成像环境漏光，直接降低了显示组件的图像显示质量。采用方案2时，由于头戴式显示设备的显示光学系统通常都是极为精密的设计，改动设计的难度极大；再者，即使实现了改动，也容易使头戴式显示设备的结构更为复杂，占用体积增大，反过来也将导致屈光度的调节范围受到限制，很难达到用户的需求。因此，现有头戴式显示设备在无法解决上述问题的情况下，其使用范围受到了极大的限制。
发明内容
本发明的实施例提供了一种通用性强的头戴式显示设备。
为了实现上述目的，本发明实施方式采用如下技术方案：
提供一种头戴式显示设备，包括壳体以及设置在所述壳体内的显示器、光学组件和调焦组件，所述壳体包括一对间隔设置的观看视窗，所述调焦组件包括一对与所述观看视窗一一对应设置的液体透镜；
每个所述液体透镜均包括透视部件，所述透视部件包括外壳，所述外壳内 形成液体容腔，所述外壳包括正对所述观看视窗设置的弹性膜，所述显示器提供的显示光源依次通过所述光学组件及所述弹性膜后投射至出瞳的方向；
每个所述液体透镜均还包括储液部件和液体驱动部件，所述储液部件内形成有储液腔，所述液体容腔和所述储液腔之间通过连通管导通，所述液体驱动部件驱动所述液体透镜内的液体在所述液体容腔和所述储液腔之间流动，使所述弹性膜呈外凸状、平面状或内凹状。
相较于现有技术，本发明实施例所述头戴式显示设备可以通过所述液体驱动部件驱动所述液体在所述液体容腔和所述储液腔之间流动状态，从而使所述弹性膜在呈外凸状、平面状或者内凹状之间转换，所述透视部件对应地形成凸透镜、平面镜或者凹透镜。当显示器提供的显示光源依次通过所述光学组件及所述弹性膜后(也即经过所述透视部件后)，所述光线的焦距减小、不变或者增大，从而在满足正常眼用户的观看需求的情况下，也解决了异常眼(例如近视眼或者远视眼)用户观看头戴式显示设备内的显示图像会模糊不清的技术问题，因此本实施例所述头戴式显示设备可以适用于绝大多数用户，通用性强。并且，相对于现有技术来说，本实施例所述头戴式显示设备不需要对所述壳体内的所述光学组件进行重新设计，避免了所述头戴式显示设备空间的浪费和成本的提升。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例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为本发明实施例所提供的一种头戴式显示设备的结构示意图。
图2为本发明实施例所提供的一种头戴式显示设备的另一结构示意图。
图3为本发明实施例所提供的一种头戴式显示设备的液体透镜的结构示意图。
图4为图3中液体透镜的另一结构示意图。
图5为图3中液体透镜的再一结构示意图。
图6为本发明实施例所提供的一种头戴式显示设备的液体透镜的一种透 视部件的结构示意图。
图7为本发明实施例所提供的一种头戴式显示设备的一种调距装置的结构示意图。
图8为图7中调距装置的另一结构示意图。
图9为本发明实施例所提供的一种头戴式显示设备的另一种调距装置的结构示意图。
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作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。
请一并参阅图1至图5，本发明实施例提供一种头戴式显示设备，特别的，本发明实施例以沉浸式显示设备作为例子进行说明。头戴式显示设备包括壳体22以及设置在壳体22内的光学组件23和调焦组件21，壳体22包括一对间隔设置的观看视窗221，调焦组件21包括一对与观看视窗221一一对应设置的液体透镜211。液体透镜221内填充液体。每个液体透镜211均包括透视部件211a，透视部件211a包括外壳2115，外壳2115内形成液体容腔211a’，外壳2115包括正对观看视窗221设置的弹性膜2113。如图2，图中箭头线束代表光线，头戴式显示设备包括的显示器提供显示光源，该显示光源经光学组件23投射出的光线经过弹性膜2113后投射至出瞳的方向。应当理解的是，当用户佩戴头戴式显示设备后，用户的眼睛3对应到穿戴式显示设备中的光学出瞳，也即显示光源光线投射至用户的眼睛3。为了形象说明本发明方案，以下将以用户的眼睛3来示意出瞳。
在本实施例中，每个液体透镜211还包括储液部件211c和液体驱动部件211d，储液部件211c内形成有储液腔211c’，液体容腔211a’和储液腔211c’之间通过连通管211b导通，液体驱动部件211d用于驱动液体透镜211内的液体在液体容腔211a’和储液腔211c’之间流动，使弹性膜2113呈外凸状、平面状或内凹状。
举例而言，请一并参阅图3至图5，液体容腔211a’的边缘具有第一厚度t， 液体容腔211a’的中间具有第二厚度T。同时，设定储液部件211c为储液缸，液体驱动部件211d包括设置在储液缸内的活塞211d’，液体驱动部件211d通过连杆连接驱动活塞211d’。
具体地：如图3所示，当液体驱动部件211d的活塞211d’处于初始位置A处时，弹性膜2113呈平面状，第二厚度T等于第一厚度t，透视部件221a形成平面镜。通过光学组件23投射出的光线经过弹性膜2113后(也即经过透视部件221a后)，光线的焦距不发生变化，使头戴式显示设备适用于正常眼用户。
如图4所示，当液体驱动部件211d驱动活塞211d’自A处移动至B处时，活塞211d’挤压储液缸内的液体，使液体通过连通管211b自储液腔211c’流向液体容腔211a’，液体容腔211a’内的液态压力大于大气压力，从而顶起弹性膜2113，弹性膜2113呈外凸状，第二厚度T大于第一厚度t，透视部件221a形成凸透镜。经过光学组件23投射出的光线经过弹性膜2113后(也即经过透视部件221a后)，光线的焦距减小，使头戴式显示设备适用于远视眼用户。
如图5所示，当液体驱动部件211d驱动活塞211d’自A处移动至C处时，活塞211d’吸出液体容腔211a’内的液体，使液体通过连通管211b自液体容腔211a’流向储液腔211c’，液体容腔211a’内的液态压力小于大气压力，大气压力压下弹性膜2113，弹性膜2113呈内凹状，第二厚度T小于第一厚度t，透视部件221a形成凹透镜。经过光学组件23投射出的光线经过弹性膜2113后(也即经过透视部件221a后)，光线的焦距增大，使头戴式显示设备适用于近视眼用户。
综上，本实施例头戴式显示设备可以通过液体驱动部件211d驱动液体在液体容腔211a’和储液腔211c’之间流动状态，从而使弹性膜在呈外凸状、平面状或者内凹状之间转换，透视部件211a对应地形成凸透镜、平面镜或者凹透镜。当显示光源经光学组件23投射出的光线经过弹性膜2113后(也即经过透视部件211a后)，光线的焦距减小、不变或者增大，从而在满足正常眼用户的观看需求的情况下，也解决了存在屈光度问题(例如近视眼或者远视眼)的用户观看头戴式显示设备内的显示图像会模糊不清的技术问题，因此本实施例头戴式显示设备可以适用于绝大多数用户，通用性强。并且，相对于现有技术来说，本实施例头戴式显示设备不需要对壳体22内的光学组件23进行改动， 例如通过改变显示器与光学组件23的距离来实现屈光度调节，从而避免了因距离调节导致头戴式显示设备体积的增加。
当然，作为本发明的另一种优选实施例，液体容腔211a’可以通过连通管直接连接气压泵，气压泵对液体容腔211a’进行补充气体或抽出气体，以改变液体容腔211a’内部与外部的压力差，从而来控制弹性膜2113的凸起或凹陷。
或者，作为本发明的再一种优选实施例，液体容腔211a’同时填充有液体和气体。此时，如果升高液体容腔211a’的内部温度，则液体容腔211a’内气体发生膨胀，压力升高，使弹性膜2113凸起；如果降低液体容腔211a’的内部温度，则液体容腔211a’内气体体积缩小，压力降低，使弹性膜2113表面凹陷。也即，可以通过控制液体容腔211a’的内部温度来灵活控制弹性膜2113的形状。
进一步的，请参阅图3至图5，当液体容腔211a’的内部和外部压力相等时，弹性膜2113的直径为D；当弹性膜2113凸起或凹陷时，第二厚度T的变化大小△T＝|T-t|≤D/2，也即弹性膜2113在内外压力的作用下凹陷或凸起最大程度为半球，以保持高质的光线调焦效果，避免因变形过大导致影响头戴式显示设备的显示质量。
进一步的，第二厚度T的变化大小△T＝|T-t|≥t/4，优选的，△T≥t/2。上述范围内变化的透视部件221a具有最佳的光线调焦效果。
作为本发明的一种优选实施例，请一并参阅图2和图3，外壳2115包括背观看视窗211设置的第一面2112，弹性膜2113设置在第一面2112的中心区域。进一步的，外壳2115还包括硬质透明框2114，弹性膜2113和硬质透明框2114相连接且共同围设出液体容腔211a’。在本实施例中，硬质透明框2114不发生形变，因此用户的眼睛可以更好地靠近观看视窗211，以减少外部光线影响观看视觉效果的风险，保证了头戴式显示设备的高质量显示。当然，硬质透明框2114在透视部件211a调焦的过程中不发生形变，保证透视部件211a调焦的准确性。
应当理解的是，本实施例中弹性膜2113和硬质透明框2114均采用不会使光线传播方向发生变化的材质。并且弹性膜2113并不限定其一定为膜层结构，只要是具有一定弹性变形的结构即可。弹性膜2113和硬质透明框2114可以是通过组装工艺形成外壳2115，也可以是一体成型的。
进一步的，弹性膜2113的面积s与第一面2112的面积满足关系式：s≥ 1/2S，优选的，s≥2/3S，最佳的s＝S，此时，透视部件211a具有最佳调焦范围。
作为本发明的另一种优选实施例，请参阅图6，外壳2115包括相对设置的第一面2112和第二面2111，第一面2111背离观看视窗211，第二面2112朝向观看视窗211，弹性膜2113包括第一弹性膜和第二弹性膜，第一弹性膜和第二弹性膜分别设置在第一面2112和第二面2111上。进一步的，外壳2115还包括硬质透明框2114，弹性膜2113和硬质透明框2114相连接且共同围设出液体容腔211a’。
在本实施例中，硬质透明框2114不发生形变，因此用户的眼睛可以更好地靠近观看视窗，以减少外部光线影响观看视觉效果的风险，保证了头戴式显示设备的高质量显示。同时，本实施例虽然额外占用头戴式显示设备的部分空间，但使得透视部件211a的调焦范围更广，头戴式显示设备能够适用更多用户。
进一步的，第一弹性膜的面积大于等于1/2的第一面2112的面积，优选的，第一弹性膜的面积大于等于2/3的第一面2112的面积，最佳的第一弹性膜的面积等于第一面2112的面积；进一步的，第二弹性膜的面积大于等于1/2的第二面2111的面积，优选的，第二弹性膜的面积大于等于2/3的第二面2111的面积，最佳的第二弹性膜的面积等于第二面2111的面积；此时，透视部件211a具有最佳调焦范围。
应当理解的是，上述实施例中，透视部件211a设置在壳体22内部，因此头戴式显示设备具有整洁美丽的外观形态。但是，本发明也欲保护一种透视部件211a位于壳体22外部的方案，在该方案中，透视部件211a可拆卸地安装至观看视窗211附近以覆盖显示光源光线的传播路径。由于透视部件211a的可拆卸特性，当头戴式显示设备不需要透视部件211a时可被拆下，以减轻头戴式显示设备的重量。
进一步的，液体透镜211内的液体的折射率大于1，当液体的折射率越大时，液体透镜211在相同的调节动作下，所具有的焦距调节范围更大(也即屈光度调节范围更大)。本实施例液体优选二硫化碳、苯和油中的一种或多种，也即液体可以是单一的液体成分，也可以是多种液体成分组合而成。
进一步的，连通管211b可以包括第一连通管和第二连通管，此时，储液 腔211c’可以包括第一储液腔和第二储液腔。第一储液腔通过第一连通管连接至液体容腔的一端，第二储液腔通过第二连通管连接至液体容腔211a’的另一端。也即，通过设置两个储液腔并且通过不同的连通管连接至液体容腔211a’的两端，可以更为灵活地对充填在液体容腔211a’的液体的多少进行调节。例如第一连通管可以为输入管，第二连通管可以为输出管，设置液体仅从液体容腔211a’的一端输入、从另一端输出，独立控制液体容腔211a’内液体的流动动作，使得弹性膜2113的变化更为灵敏。当然，也可以将第一连通管和第二连通管同时设置为输入管或者输出管，同时调节液体容腔211a’的两端的液体的进出，使得弹性膜2113的变化更为迅速。
应当理解的是，请参阅图2，在本实施中，一对观看视窗221之间的距离一般设置成与用户瞳距相同或相近，以方便用户观看。同时，优选的，调焦组件21的透视部件211a覆盖观看视窗21，从而使从观看视窗21射出的光线能够都经过透视部件211a后再射入用户的眼睛3，以为用户提供正常的显示图像。优选的，透视部件211a完全贴合观看视窗221设置，避免外部光线从透视部件211a与观看视窗221之间的间隙进入头戴式显示设备23的光线传递路径，干扰头戴式显示设备的显示效果。当头戴式显示设备为沉浸式显示设备时，贴合设置更为重要。当然，当透视部件211a与观看视窗221间隔设置时，也可以通过额外设置挡光件，以遮挡外部光线。
进一步的，请一并参阅图1和图2，调焦组件21还包括调距装置212，调距装置212用以调节一对液体透镜211的透视部件211a之间的距离，使一对液体透镜211的弹性膜2113的中心的间距等于用户的瞳距，也即所弹性膜2113的中心能够正对用户的眼睛3，使用户的眼睛3上所接受的显示光线得到最佳的修正效果，从而使头戴式显示设备实现高质量的图像显示。
作为本发明的一种优选实施例，请一并参阅图2、图7和图8，调距装置212包括固定在壳体22上的滑槽2121，滑槽2121的滑动轨自一个观看视窗211延伸至另一个观看视窗211，一对透视部件211a滑动地卡设于滑槽2121内。本实施例中，一对透视部件211a可以沿滑动轨在滑槽2121内自由移动，可以手动或者电动控制，从而实现调距装置212调节透视部件211a之间的距离的目的。
作为本发明的另一种优选实施例，请一并参阅图2和图9，调距装置212 包括螺纹连接的第一杆2122和第二杆2123，第一杆2122和第二杆2123分别连接至一对透视部件211a。本实施例中，螺纹连接的第一杆2122和第二杆2123可以相互移动，因此可以带动一对透视部件211a产生相互位移，从而实现调距装置212调节透视部件211a之间的距离的目的。
应当理解的是，上述两个优选实施例可以分开实现，也可以相互结合以获得新的方案，也即调距装置同时包括有滑槽以及螺纹连接的第一杆和第二杆，滑槽用以提供一对透视部件211a的滑动轨(移动路径)，第一杆和第二杆用于精密调节一对透视部件211a的间距。
进一步的，请一并参阅图2和图3，为方便实现述所弹性膜2113的中心能够正对用户的眼睛3这一目的，设置弹性膜2113的中心对齐透视部件211a的中心。如此一来，调距装置212只需要调节两个透视部件211a的中心之间的距离即可。应当理解的是，调距装置212可以有多种实现方式，只要是能够实现距离调节的结构，均在本发明所欲保护范围内。其中，调距装置212包括但不限于丝杠结构、螺杆结构、齿轮结构。
进一步的，请参阅图1和图3，头戴式显示设备还包括固定组件1，固定组件1包括第一支架11和第二支架12，第一支架11架设在用户面部(通常是鼻梁以及眼睛附近的区域)，第二支架12架设在用户头顶。壳体22固定在第一支架11上，以方便用户眼睛直视光学组件23发出的光线。每个液体透镜211的透视部件211a均固定在壳体22上，也即透视部件211a固定在第一支架11上，同时，每个液体透镜211的储液部件211c和液体驱动部件211d均固定在第二支架12上。
在本实施例中，第一支架11一般架设在用户的鼻梁上，所示第二支架12可以架设在用户头部，因此如果第一支架11用以支撑的部件太多，会使用户的鼻梁具有压迫感、不舒适。本实施例头戴式显示设备将液体透镜211的透视部件211a固定第一支架11上，也即透视部件211a固定在第一支架11上，液体透镜211的储液部件211c和液体驱动部件211d固定在第二支架12上，分开设置液体透镜211的不同部件，减小了第一支架11的负重，减轻用户鼻梁的负担，使用户具有更好的体验感。当然，本发明头戴式显示设备还可以包括有音频组件，音频组件固定在第二支架12上，第二支架12包括有封闭式耳罩和顶部固定架，均可以辅助固定和支撑。
以上对本发明实施例进行了详细介绍，本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明的限制。

Claims (10)

  1. 一种头戴式显示设备，其特征在于，所述头戴式显示设备包括壳体以及设置在所述壳体内的显示器、光学组件和调焦组件，所述壳体包括一对间隔设置的观看视窗，所述调焦组件包括一对与所述观看视窗一一对应设置的液体透镜；
    每个所述液体透镜均包括透视部件，所述透视部件包括外壳，所述外壳内形成液体容腔，所述外壳包括正对所述观看视窗设置的弹性膜，所述显示器提供的显示光源依次通过所述光学组件及所述弹性膜后投射至出瞳的方向；
    每个所述液体透镜均还包括储液部件和液体驱动部件，所述储液部件内形成有储液腔，所述液体容腔和所述储液腔之间通过连通管导通，所述液体驱动部件驱动所述液体透镜内的液体在所述液体容腔和所述储液腔之间流动，使所述弹性膜呈外凸状、平面状或内凹状。
  2. 如权利要求1所述的头戴式显示设备，其特征在于，所述外壳包括背离所述观看视窗设置的第一面，所述弹性膜设置在所述第一面的中心区域。
  3. 如权利要求1所述的头戴式显示设备，其特征在于，所述外壳包括相对设置的第一面和第二面，所述第一面背离所述观看视窗，所述第二面靠近所述观看视窗，所述弹性膜包括第一弹性膜和第二弹性膜，所述第一弹性膜和所述第二弹性膜分别设置在所述第一面和所述第二面上。
  4. 如权利要求2或3所述的头戴式显示设备，其特征在于，所述外壳还包括硬质透明框，所述弹性膜和所述硬质透明框相连接且共同围设出所述液体容腔。
  5. 如权利要求1所述的头戴式显示设备，其特征在于，所述液体透镜的液体的折射率大于1。
  6. 如权利要求1所述的头戴式显示设备，其特征在于，所述连通管包括第一连通管和第二连通管，所述储液腔包括第一储液腔和第二储液腔，所述第一储液腔通过所述第一连通管连接至所述液体容腔的一端，所述第二储液腔通过所述第二连通管连接至所述液体容腔的另一端。
  7. 如权利要求1所述的头戴式显示设备，其特征在于，所述调焦组件还包括调距装置，所述调距装置用以调节所述一对透视部件之间的距离，使所述 一对弹性膜的中心之间距等于用户的瞳距。
  8. 如权利要求7所述的头戴式显示设备，其特征在于，所述调距装置包括固定在所述壳体上的滑槽，所述滑槽的滑动轨自一个所述观看视窗延伸至另一个所述观看视窗，所述透视部件滑动地卡设于所述滑槽内。
  9. 如权利要求7所述的头戴式显示设备，其特征在于，所述调距装置包括螺纹连接的第一杆和第二杆，所述第一杆和所述第二杆分别连接至所述一对透视部件。
  10. 如权利要求1所述的头戴式显示设备，其特征在于，所述头戴式显示设备还包括第一支架和第二支架，所述第一支架架设在用户面部，所述第二支架架设在用户头顶，
    所述壳体固定在所述第一支架上，
    每个所述液体透镜的所述透视部件均固定在所述壳体上，
    每个所述液体透镜的所述储液部件和所述液体驱动部件均固定在所述第二支架上。
PCT/CN2015/099873 2015-12-30 2015-12-30 头戴式显示设备 Ceased WO2017113192A1 (zh)

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