WO2019033284A1 - 头戴显示设备 - Google Patents

头戴显示设备 Download PDF

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Publication number
WO2019033284A1
WO2019033284A1 PCT/CN2017/097565 CN2017097565W WO2019033284A1 WO 2019033284 A1 WO2019033284 A1 WO 2019033284A1 CN 2017097565 W CN2017097565 W CN 2017097565W WO 2019033284 A1 WO2019033284 A1 WO 2019033284A1
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Prior art keywords
lens
display device
mounted display
head mounted
lens group
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PCT/CN2017/097565
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English (en)
French (fr)
Inventor
靳云峰
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Shenzhen Royole Technologies Co Ltd
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Shenzhen Royole Technologies Co Ltd
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Priority to PCT/CN2017/097565 priority Critical patent/WO2019033284A1/zh
Priority to CN201780053959.3A priority patent/CN109643024A/zh
Publication of WO2019033284A1 publication Critical patent/WO2019033284A1/zh
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B25/00—Eyepieces; Magnifying glasses
    • 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

Definitions

  • the present invention relates to optical imaging technology, and more particularly to a head mounted display device.
  • a head-mounted display device generally uses an optical system to magnify an image on a display screen, thereby giving the user a sense of a large-screen image having a certain sense of distance.
  • the existing head-mounted display device has a problem that the volume is too large, the image clarity seen by the user is too low, and the angle of view is small.
  • Embodiments of the present invention provide a head mounted display device.
  • the present invention provides a head-mounted display device, comprising: a display screen and a lens group, wherein the lens group includes, in order from the image side of the lens group to the object side of the lens group, in order:
  • a fourth lens having a negative refracting power, the image side of the fourth lens being a concave surface
  • the display screen is located on the object side of the lens group.
  • the head-mounted display device of the embodiment of the present invention can effectively shorten the lens group length of the head-mounted display device by using a combination of a lens having a Fresnel surface and three lenses.
  • FIG. 1 is a schematic structural view of a head mounted display device according to an embodiment of the present invention.
  • FIG. 2 is another schematic structural view of a head mounted display device according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of an imaging point sequence of a head mounted display device according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of an imaging MTF of a head mounted display device according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of distortion and field curvature of a head mounted display device according to an embodiment of the present invention.
  • the display device 100, the display screen 10, the lens group 20, the first lens 22, the second lens 24, the third lens 26, the fourth lens 28, and the observation point 30 are worn.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” or “second” may include one or more of the described features either explicitly or implicitly.
  • the meaning of "a plurality” is two or more unless specifically and specifically defined otherwise.
  • connection In the description of the present invention, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or connected in one piece. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, which can be the internal communication of two elements or the interaction of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
  • a head mounted display device 100 of an embodiment of the present invention includes a display screen 10 and a lens group 20.
  • the lens group 20 includes, in order from the image side of the lens group 20 to the object side of the lens group 20, a first lens 22 having a positive refracting power, a second lens 24 having a positive refracting power, a third lens 26 having a positive refracting power, and a negative refracting power.
  • the first lens 22 has an image side surface S1 and an object side surface S2, and the object side surface S2 is a Fresnel surface.
  • the second lens 24 has an image side surface S3 and a side surface S4, and the image side surface S3 is a convex surface.
  • the third lens 26 has an image side surface S5 and an object side surface S6, and the image side surface S5 is a convex surface.
  • the fourth lens 28 has an image side surface S7 and an object side surface S8, and the image side surface S7 is a concave surface.
  • the display screen 10 is located on the object side of the lens group 20, and the display screen 10 has a surface S9 and a display surface S10, wherein the surface S9 is adjacent to the lens group 20.
  • the head-mounted display device 100 of the embodiment of the present invention can effectively shorten the length of the lens group 20 of the head-mounted display device 100 by using a combination of a lens having a Fresnel surface and three lenses.
  • the image side surface S1, the object side surface S4, the object side surface S6, and the object side surface S8 of the embodiment of the present invention may be a flat surface, a concave surface, or a convex surface, which is not specifically limited herein.
  • the display screen 10 generally includes a cover glass, a watch
  • the surface S9 may refer to the surface of the cover glass
  • the display surface S10 may refer to the actual display surface of the display screen 10.
  • the head mounted display device 100 includes two lens groups 20 and two display screens 10. Each display screen 10 is disposed on the object side of a corresponding one of the lens groups 20.
  • the images displayed by the two display screens 10 can be optically imaged using the two lens groups 20.
  • the head mounted display device 100 includes two lens groups 20 and two display screens 10 such that one lens group 20 and one display screen 10 can correspond to each eye of a person.
  • Each display screen 10 is disposed on the object side of the corresponding one lens group 20, and the user observes the display screen 10 through the lens group 20, that is, the screen displayed on each display screen 10 passes through the lens group 20 and is imaged in the human eye, thus the human eye.
  • One side may correspond to the image side of the lens group 20, and one side of the display screen 10 may correspond to the object side of the lens group 20.
  • display screen 10 is 1 inch in size and lens group 20 has a focal length of 22 millimeters.
  • the size of the head mounted display device 100 can be reduced.
  • the head-mounted display device 100 generally adopts a larger display screen 10, such as a display screen 10 of 3 inches or more, in order to form a larger image after passing through the lens group 20, which causes the size of the head-mounted display device 100 to pass.
  • the head mounted display device 100 of the embodiment of the present invention adopts a display screen having a size of 1 inch, and the focal length of the lens group 20 is 22 mm, thereby greatly reducing the size of the head mounted display device 100, and at the same time, The screen displayed on the display screen 10 can still form a larger image after being enlarged by the lens group 20.
  • the resolution of display screen 10 is 2k*2k. In this way, the screen of the display screen 10 can be made to pass through the lens group 20 to form a clear image.
  • the display screen 10 having a resolution of 2k*2k, since the display screen 10 itself has more pixels, even if the image displayed on the display screen 10 is enlarged, it can have more clear details, thereby Users can observe high definition images.
  • the field of view of lens group 20 is 88 degrees. As such, the user can observe more of the screen of the display screen 10 through the lens group 20.
  • the length d1 of the first lens 22 to the display screen 10 is 33.5 mm. In this way, the length of the head mounted display device 100 can be shortened.
  • the length d1 of the first lens 22 to the display screen 10 may refer to the length of the image side S1 of the first lens 22 at the optical axis of the lens group 20 to the display surface S10 of the display screen 10.
  • the length d1 of the first lens 22 to the display screen 10 is 33.5 mm, thereby being shortened The length of the display device 100 is worn.
  • the first lens 22 and the second lens 24 are spaced apart by a distance of 0.1 mm to 1 mm; the second lens 24 and the third lens 26 are spaced apart by a distance of 0.1 mm to 1 mm; the third lens 26 and Fourth lens 28
  • the distance between the partitions is 0.1 mm to 1 mm; the distance between the fourth lens 28 and the display screen 10 is 0.1 mm to 1 mm.
  • the length of the head mounted display device 100 can be shortened.
  • the respective components may be disposed as close as possible, for example, the first lens 22 and the second lens 24 are disposed.
  • the distance between the spacers is 0.1 mm to 1 mm; the distance between the second lens 24 and the third lens 26 is 0.1 mm to 1 mm; the distance between the third lens 26 and the fourth lens 28 is 0.1 mm to 1 mm;
  • the distance between the fourth lens 28 and the display screen 10 is set to be 0.1 mm to 1 mm. Since the distance between the respective components is small, the length of the head mounted display device 100 can be effectively shortened. Further, the small distance between the respective lenses of the lens group 20 can make the lens group 20 have a more excellent optical effect.
  • the head mounted display device 100 includes a viewing point 30 having a distance w1 from the viewing point 30 to the first lens 22 of 18.5 millimeters.
  • the observation point 30 may refer to a position corresponding to the eyes of the user.
  • the distance w1 from the observation point 30 to the first lens 22 is too short, the user must take off the glasses to use the head mounted display device 100, so that the headset is worn.
  • the display device 100 does not satisfy the usage requirements of some users, so the distance w1 of the observation point 30 to the first lens 22 may be 18.5 mm, so that the user can use the head-mounted display device 100 without taking off the glasses.
  • the distance w1 of the observation point 30 to the first lens 22 cannot be too long. It can be understood that the distance w1 of the observation point 30 from the first lens 22 may refer to the distance from the image side surface S1 of the first lens 22 to the observation point 30 at the optical axis of the lens group 20.
  • the focal length of the first lens 22 is 60.86 mm to 100.86 mm
  • the focal length of the second lens 24 is 32 mm to 52 mm
  • the focal length of the third lens 26 is 45.45 mm to 80.45 mm
  • the fourth lens 28 The focal length is -39.78 mm to -19.78 mm.
  • the angle of view of the lens group 20 can be increased and the size of the head mounted display device 100 can be reduced.
  • the head mounted display device 100 satisfies the conditions of Table 1 below:
  • FIG. 3 is a schematic diagram of an image dot array of a head mounted display device according to an embodiment of the present invention.
  • the dot-column diagram shows the image height of the spot formed by the convergence of light at the image plane at each angle of view.
  • the dot-column diagram shows the image heights of the spot formed by the convergence of the light at the image angle of the 0 degree field of view, the angle of view of the angle of 20 degrees and the angle of view of the angle of 44 degrees, respectively, 0 mm, 7.332 mm and 12.903 mm. .
  • FIG. 4 is a schematic diagram of an imaging MTF of a head mounted display device according to an embodiment of the present invention.
  • the horizontal axis in the imaging MTF diagram represents spatial resolution in lp/mm (number of pairs per millimeter) and the vertical axis represents the MTF value, which is the percentage of imaging quality that reaches the physical condition, from 0 to 1.
  • the MTF values corresponding to the different spatial rates of the 0 degree field of view angle, the 20 degree field of view angle and the 44 degree field of view angle are respectively extracted.
  • T is the meridional plane
  • S is the sagittal plane
  • the MTF corresponding to T and S is the same at the 0 degree field of view.
  • FIG. 5 is a schematic diagram of distortion and field curvature of a head mounted display device according to an embodiment of the present invention.
  • T is the meridional field curvature, that is, the field curvature curve corresponding to the meridional plane
  • S is the sagittal field curvature, that is, the field curvature curve corresponding to the sagittal plane
  • the difference between the meridional field curvature and the sagittal field curvature is astigmatism.
  • Field curvature and astigmatism affect the aberration of the off-axis field of view light. The difference is too large to seriously affect the imaging quality of the system's off-axis light. Distortion variables in the distortion graph do not affect the sharpness of the image and only cause image distortion.
  • the first feature "on” or “under” the second feature may include direct contact of the first and second features, and may also include first and second features, unless otherwise specifically defined and defined. It is not in direct contact but through additional features between them.
  • the first feature "above”, “above” and “above” the second feature includes the first feature directly above and above the second feature, or merely indicating that the first feature level is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature includes the first feature directly below and below the second feature, or merely the first feature level being less than the second feature.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

一种头戴显示设备(100)，头戴显示设备(100)包括显示屏(10)和透镜组(20)，透镜组(20)从透镜组(20)的像侧到透镜组(20)的物侧依次包括具有正屈光度的第一透镜(22)、具有正屈光度的第二透镜(24)、具有正屈光度的第三透镜(26)和具有负屈光度的第四透镜(28)，第一透镜(22)的物侧面S2为菲涅尔面，第二透镜(24)的像侧面S3为凸面，第三透镜(26)的像侧面S5为凸面，第四透镜(28)的像侧面S7为凹面，显示屏(10)位于透镜组(20)的物侧。

Description

头戴显示设备 技术领域
本发明涉及光学成像技术，特别涉及一种头戴显示设备。
背景技术
在相关技术中，头戴显示设备一般利用光学系统将显示屏上的图像放大，从而给用户一种有一定距离感的大屏图像的观感。但是，现有的头戴显示设备存在体积过大、用户看到的图像清晰度过低、视场角小等问题。
发明内容
本发明的实施例提供一种头戴显示设备。
本发明提供一种头戴显示设备，其特征在于，包括显示屏和透镜组，所述透镜组从所述透镜组的像侧到所述透镜组的物侧依次包括：
具有正屈光度的第一透镜，所述第一透镜的物侧面为菲涅尔面；
具有正屈光度的第二透镜，所述第二透镜的像侧面为凸面；
具有正屈光度的第三透镜，所述第三透镜的像侧面为凸面；和
具有负屈光度的第四透镜，所述第四透镜的像侧面为凹面；
所述显示屏位于所述透镜组的物侧。
本发明实施方式的头戴显示设备利用具有菲涅尔面的透镜和三个透镜的结合，可有效缩短头戴显示设备的透镜组长度。
本发明的实施方式的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实施方式的实践了解到。
附图说明
本发明的上述和/或附加的方面和优点从结合下面附图对实施方式的描述中将变得明显和容易理解，其中：
图1是本发明实施方式的头戴显示设备的结构示意图；
图2是本发明实施方式的头戴显示设备的另一个结构示意图；
图3是本发明实施方式的头戴显示设备的成像点列示意图；
图4是本发明实施方式的头戴显示设备的成像MTF示意图；
图5是本发明实施方式的头戴显示设备的畸变及场曲曲线示意图。
主要元件符号附图说明：
头戴显示设备100、显示屏10、透镜组20、第一透镜22、第二透镜24、第三透镜26、第四透镜28、观察点30。
具体实施方式
下面详细描述本发明的实施方式，所述实施方式的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施方式是示例性的，仅用于解释本发明，而不能理解为对本发明的限制。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”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。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接。可以是机械连接，也可以是电连接。可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
请参阅图1，本发明实施方式的头戴显示设备100包括显示屏10和透镜组20。透镜组20从透镜组20的像侧到透镜组20的物侧依次包括具有正屈光度的第一透镜22、具有正屈光度的第二透镜24、具有正屈光度的第三透镜26和具有负屈光度的第四透镜28。第一透镜22具有像侧面S1和物侧面S2，物侧面S2为菲涅尔面。第二透镜24具有像侧面S3和和物侧面S4，像侧面S3为凸面。第三透镜26具有像侧面S5和物侧面S6，像侧面S5为凸面。第四透镜28具有像侧面S7和物侧面S8，像侧面S7为凹面。显示屏10位于透镜组20的物侧，显示屏10具有表面S9和显示面S10，其中表面S9靠近透镜组20。
本发明实施方式的头戴显示设备100利用具有菲涅尔面的透镜和三个透镜的结合，可有效缩短头戴显示设备100的透镜组20的长度。
具体地，本发明实施方式的像侧面S1、物侧面S4、物侧面S6和物侧面S8可以是平面、凹面或者凸面，在此不做具体限定。需要说明的是，显示屏10一般包括盖板玻璃，表 面S9可以是指盖板玻璃的表面，显示面S10可以是指显示屏10实际上的显示面。
请参阅图2，在某些实施方式中，头戴显示设备100包括两个透镜组20和两个显示屏10。每个显示屏10设置在对应的一个透镜组20的物侧。
如此，可以利用两个透镜组20对两个显示屏10显示的画面进行光学成像。
具体地，头戴显示设备100包括两个透镜组20和两个显示屏10，从而一个透镜组20和一个显示屏10可以对应人的每只眼睛。每个显示屏10设置在对应的一个透镜组20的物侧，用户通过透镜组20观察显示屏10，即每个显示屏10上显示的画面通过透镜组20后在人眼成像，因此人眼一侧可以相当于透镜组20的像侧，显示屏10的一侧可以相当于透镜组20的物侧。
在某些实施方式中，显示屏10的尺寸为1英寸，透镜组20的焦距为22毫米。
如此，可以减小头戴显示设备100的尺寸。
可以理解，头戴显示设备100为了使得经过透镜组20后形成较大的图像，一般采用较大的显示屏10，比如3英寸以上的显示屏10，这样会使头戴显示设备100的尺寸过大，从而使得头戴显示设备100不利于携带。因此，本发明实施方式的头戴显示设备100采用尺寸为1英寸的显示屏，并且将透镜组20的焦距为22毫米，从而极大地减小了头戴显示设备100的尺寸，与此同时，显示屏10显示的画面经过透镜组20的放大后仍能形成较大的图像。
在某些实施方式中，显示屏10的分辨率为2k*2k。如此，可以使得显示屏10的画面经过透镜组20后形成清晰的图像。
具体地，采用分辨率为2k*2k的显示屏10，由于显示屏10本身具备较多的像素点，因此即便显示屏10显示的图像经过放大后，也可以具有较多的清晰细节信息，从而用户可以观察到高清晰度的图像。
在某些实施方式中，透镜组20的视场角为88度。如此，用户通过透镜组20能够观察到更多的显示屏10的画面。
请再次参阅图1，在某些实施方式中，第一透镜22到显示屏10的长度d1为33.5毫米。如此，可以缩短头戴显示设备100的长度。
可以理解，第一透镜22到显示屏10的长度d1可以是指透镜组20的光轴处第一透镜22的像侧面S1到显示屏10的显示面S10的长度。通过合理设计第一透镜22的厚度、第二透镜24的厚度、第三透镜26的厚度和第四透镜28的厚度，使得第一透镜22到显示屏10的长度d1为33.5毫米，从而可以缩短头戴显示设备100的长度。
在某些实施方式中，第一透镜22和第二透镜24间隔的距离为0.1毫米至1毫米；第二透镜24和第三透镜26间隔的距离为0.1毫米至1毫米；第三透镜26和第四透镜28间 隔的距离为0.1毫米至1毫米；第四透镜28和显示屏10间隔的距离为0.1毫米至1毫米。
如此，可以缩短头戴显示设备100的长度。
具体地，在设置第一透镜22、第二透镜24、第三透镜26、第四透镜28和显示屏10时，可以将各个部件尽量靠近地设置，例如设置第一透镜22和第二透镜24间隔的距离为0.1毫米至1毫米；设置第二透镜24和第三透镜26间隔的距离为0.1毫米至1毫米；设置第三透镜26和第四透镜28间隔的距离为0.1毫米至1毫米；设置第四透镜28和显示屏10间隔的距离为0.1毫米至1毫米。由于各个部件之间间隔的距离较小，因此可以有效地缩短头戴显示装置100的长度。此外，透镜组20的各个透镜之间间隔的距离小可以使得透镜组20具有更加良好的光学效果。
请再次参阅图1，在某些实施方式中，头戴显示设备100包括观察点30，观察点30到第一透镜22的距离w1为18.5毫米。
如此，使得观察点30和第一透镜22之间具有合适的距离w1。
具体地，观察点30可以是指对应用户眼睛的位置。在某些头戴显示设备100的使用情况中，比如用户自身佩戴眼镜，观察点30若到第一透镜22的距离w1过短，用户必须摘下眼镜才能使用头戴显示设备100，使得头戴显示设备100不满足部分用户的使用需求，因此观察点30到第一透镜22的距离w1可以为18.5毫米，从而可以使得用户不需要摘下眼镜就能使用头戴显示设备100。此外，为了减小头戴显示设备100的尺寸，观察点30到第一透镜22的距离w1也不能太长。可以理解，观察点30与第一透镜22的距离w1可以是指在透镜组20的光轴处，第一透镜22的像侧面S1到观察点30的距离。
在某些实施方式中，第一透镜22的焦距为60.86毫米至100.86毫米，第二透镜24的焦距为32毫米至52毫米，第三透镜26的焦距为45.45毫米至80.45毫米，第四透镜28的焦距为-39.78毫米至-19.78毫米。
如此，可以增大透镜组20的视场角和减小头戴显示设备100的尺寸。
在某些实施方式中，头戴显示设备100满足下面表1的条件：
Figure PCTCN2017097565-appb-000001
Figure PCTCN2017097565-appb-000002
表1
图3是本发明实施方式的头戴显示设备的成像点列示意图。点列示意图显示的是各个视场角下光线在像面处汇聚而形成的点斑的像高。点列示意图显示的是0度视场角下、20度视场角下和44度视场角下光线在像面出汇聚而形成的点斑的像高分别为0毫米、7.332毫米和12.903毫米。
图4是本发明实施方式的头戴显示设备的成像MTF示意图。成像MTF示意图中的横轴代表空间分辨率，单位是lp/mm(每毫米的线对数)，纵轴代表MTF值，即成像质量达到实物状况的百分比，从0到1。图中分别汇出了0度视场角下、20度视场角下和44度视场角下不同空间分别率对应的MTF值。其中，T为子午面，S为弧矢面，0度视场角下T和S对应的MTF一致。
图5是本发明实施方式的头戴显示设备的畸变及场曲曲线示意图。场曲曲线图中T为子午场曲，即子午面对应的场曲曲线，S为弧矢场曲，即弧矢面对应的场曲曲线，子午场曲和弧矢场曲的差为象散，场曲和象散影响着轴外视场光线的像差，差值过大会严重影响到系统轴外光线的成像质量。畸变曲线图中的畸变量不会影响图像的清晰度，仅会引起图像变形。
在本发明中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
下文的公开提供了许多不同的实施方式或例子用来实现本发明的不同结构。为了简化本发明的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本发明。此外，本发明可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本发明提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
在本说明书的描述中，参考术语“一个实施方式”、“一些实施方式”、“示意性实施方式”、 “示例”、“具体示例”、或“一些示例”等的描述意指结合实施方式或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施方式或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施方式或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施方式或示例中以合适的方式结合。
尽管已经示出和描述了本发明的实施方式，本领域的普通技术人员可以理解：在不脱离本发明的原理和宗旨的情况下可以对这些实施方式进行多种变化、修改、替换和变型，本发明的范围由权利要求及其等同物限定。

Claims (12)

  1. 一种头戴显示设备，其特征在于，包括显示屏和透镜组，所述透镜组从所述透镜组的像侧到所述透镜组的物侧依次包括：
    具有正屈光度的第一透镜，所述第一透镜的物侧面为菲涅尔面；
    具有正屈光度的第二透镜，所述第二透镜的像侧面为凸面；
    具有正屈光度的第三透镜，所述第三透镜的像侧面为凸面；和
    具有负屈光度的第四透镜，所述第四透镜的像侧面为凹面；
    所述显示屏位于所述透镜组的物侧。
  2. 如权利要求1所述的头戴显示设备，其特征在于，所述头戴显示设备包括两个所述透镜组和两个所述显示屏，每个所述显示屏设置在对应的一个所述透镜组的物侧。
  3. 如权利要求1所述的头戴显示设备，其特征在于，所述显示屏的尺寸为1英寸，所述透镜组的焦距为22毫米。
  4. 如权利要求1所述的头戴显示设备，其特征在于，所述显示屏的分辨率为2k*2k。
  5. 如权利要求1所述的头戴显示设备，其特征在于，所述透镜组的视场角为88度。
  6. 如权利要求1所述的头戴显示设备，其特征在于，所述第一透镜到所述显示屏的长度为33.5毫米。
  7. 如权利要求1所述的头戴显示设备，其特征在于，所述头戴显示设备包括观察点，所述观察点到所述第一透镜的距离为18.5毫米。
  8. 如权利要求1-7任意一项所述的头戴显示设备，其特征在于，所述第一透镜的焦距为60.86毫米至100.86毫米。
  9. 如权利要求1-8任意一项所述的头戴显示设备，其特征在于，所述第二透镜的焦距为32毫米至52毫米。
  10. 如权利要求1-9任意一项所述的头戴显示设备，其特征在于，所述第三透镜的焦距为45.45毫米至80.45毫米。
  11. 如权利要求1-10任意一项所述的头戴显示设备，其特征在于，所述第四透镜的焦距为-39.78毫米至-19.78毫米。
  12. 如权利要求1所述的头戴显示设备，其特征在于，所述第一透镜和所述第二透镜间隔的距离为0.1毫米至1毫米；所述第二透镜和所述第三透镜间隔的距离为0.1毫米至1毫米；所述第三透镜和所述第四透镜间隔的距离为0.1毫米至1毫米；所述第四透镜和所述显示屏间隔的距离为0.1毫米至1毫米。
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