WO2021109935A1 - 一种近眼显示光学*** - Google Patents
一种近眼显示光学*** Download PDFInfo
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- WO2021109935A1 WO2021109935A1 PCT/CN2020/132189 CN2020132189W WO2021109935A1 WO 2021109935 A1 WO2021109935 A1 WO 2021109935A1 CN 2020132189 W CN2020132189 W CN 2020132189W WO 2021109935 A1 WO2021109935 A1 WO 2021109935A1
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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
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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
- G02B2027/0178—Eyeglass type
Definitions
- This application relates to the field of optical engineering, in particular to a near-eye display optical system.
- Near-eye display systems can provide people with virtual images, the most important of which is augmented reality (AR), a new technology that "seamlessly" integrates real world information and virtual world information.
- AR augmented reality
- Augmented reality glasses are the main implementation of AR. It can provide users with large screens and 3D effects. It has the potential to replace existing display and computing terminals such as mobile phones, computers and TVs, and has a very wide range of application prospects.
- off-axis catadioptric structures including off-axis catadioptric structures, free-form surface prisms, waveguide glasses, etc. Due to the constraints of Lagrangian invariants, it is difficult to solve the problem of large field of view, large exit pupil diameter and volume. The contradiction between.
- the off-axis folding structure is generally helmet-shaped and relatively heavy.
- the free-form surface prism has a relatively small field of view and exit pupil diameter, and the system is thick and heavy.
- the waveguide AR can expand the exit pupil diameter, it is difficult to enlarge the field of view, and the energy utilization rate is very low. None of the existing technologies can resolve the contradiction between optical performance and system volume and quality.
- the present application provides a near-eye display optical system in order to solve the problems of the existing AR glasses that the field of view is small, the exit pupil diameter is small, and the system is bulky.
- a near-eye display optical system in which a display system is placed in front of the pupil at a reference position, and a spherical reflective lens is placed in front of the display system;
- the display pixels in the display system are distributed on a convex surface, and the display pixels in the display system emit light toward the spherical reflective lens, and the spherical reflective lens reflects the light to the pupil at the reference position; using the persistence effect of human vision, the display system passes on The image is generated by the light in motion, and the image is magnified and reflected to the pupil at the reference position through the spherical reflective lens.
- a near-eye display optical system comprising a display system and a spherical reflective lens;
- the spherical reflective lens has two surfaces, the first surface is a partially reflective surface, which is used to amplify and reflect an image on the display system to the reference position Pupil, the second surface is the transmission surface, used to correct the ambient light to adapt to the wearer's degree, the position of the partial reflection surface and the transmission surface can be interchanged;
- a display system is placed in front of the pupil at the reference position, and a spherical reflective lens is arranged in front of the display system.
- the display system is composed of a hole-like structure array distributed on a spherical transparent substrate and an area outside the array;
- the area outside the array is a display pixel distribution area, and the light emitted by the display pixel is reflected by the spherical reflective lens and enters the pupil at the reference position through the hole-like structure array.
- a near-eye display optical system which is characterized in that it includes a display system and a spherical reflective lens;
- the display system is composed of a transparent display screen alone, or a combination of a dynamic light-shielding layer and a transparent display screen.
- the dynamic light-shielding layer is located on the side of the human eye and is configured to block the transparent display screen directly to the side of the human eye. Light, and transmits the light reflected by the spherical reflective lens.
- the spherical reflective lens has two surfaces: the first surface is a partially reflective surface, which is used to amplify and reflect the image on the display system to the reference position of the pupil; the second surface is a transmissive surface, which is used to correct the ambient light to adapt to the The degree of the wearer; the position of the partially reflective surface and the transmissive surface can be interchanged.
- the near-eye display optical system provided by this application has at least the following beneficial effects: the near-eye display optical system described in this application can achieve a large field of view, a large exit pupil diameter and a high-resolution At the same time keep the glasses light.
- the near-eye display system described in this application can achieve a field of view angle greater than 100°, the exit pupil diameter can be greater than 8mm, the resolution can reach 2um pixels, and the resolution of different fields of view remains the same. At the same time, the overall size of the system is small and the appearance is similar to glasses .
- the near-eye display optical system described in the present application adopts a linear array display pixel rotation mode, which is simple to manufacture, low in cost, and easy to implement.
- the near-eye display optical system described in the present application adopts a hole-shaped display screen, and has the advantage that it is a fixed component, has a stable structure, and does not interfere with stray light.
- the near-eye display optical system described in the present application adopts a combination of a transparent display screen and a dynamic shading screen.
- the advantage is that it is a fixed component, has a stable structure, and is relatively easy to manufacture.
- FIG. 1 is a schematic diagram of the overall structure of a near-eye display optical system described in this application;
- FIG. 2 is a schematic diagram of a modulation function curve of a near-eye display optical system described in this application;
- Figure 3 is a schematic diagram of a rotating linear array display system with a protective layer
- Figure 4 is a schematic diagram of the structure of a display system with a line array of pixels
- Figure 5 is a schematic diagram of the structure of a cross-line array pixel display system
- Figure 6 is a schematic diagram of the structure of the M-shaped linear array pixel display system
- FIG. 7 is a structural diagram of a driving system in a near-eye display optical system described in this application; among them, FIG. 7a is a schematic diagram of a structure driven by a gear to rotate; FIG. 7b is a schematic diagram of a rotating bearing structure;
- FIG. 9 is a schematic diagram of the positional relationship between the stator coil and the permanent magnet in the near-eye display optical system described in this application;
- FIG. 10 is a schematic structural diagram of the rotation of a magnetic levitation coil in a near-eye display optical system described in this application;
- Fig. 11 is a schematic diagram of a display system in a near-eye display optical system with another structure of the application; among them, Fig. 11a is a schematic structural diagram of a hole-shaped display system; Fig. 11b is a schematic structural diagram of a square display system; Fig. 11c is a hexagonal display system Schematic diagram of the structure of the shape display system;
- FIG. 12 is a schematic diagram of another near-eye display optical system using a transparent display screen and a dynamic light shielding layer in this application.
- Display system 1-1, transparent substrate, 1-2, base extension, 1-3, outer frame, 1-4, line array display pixels, 1-5, electronic control system, 1- 6.
- a near-eye display optical system includes a display system 1 and a spherical mirror 2; the display system 1 is placed in front of the pupil 3 at the reference position, and the spherical surface is placed in front of the display system 1 Reflective lens 2; the display pixels in the display system 1 are distributed on a convex surface, the display pixels in the display system 1 emit light to the spherical reflective lens 2, and the spherical reflective lens 2 reflects the light to the reference position of the pupil 3; using the human eye Persistence of vision effect, the display system 1 generates an image by emitting light in motion, and magnifies the image through a spherical reflective lens 2 and reflects it to the pupil 3 at the reference position.
- the spherical reflective lens 2 has two surfaces.
- the first surface is a partially reflective surface 2-1, which is used to enlarge the image on the display system 1 and place it in the visible range of the human eye.
- the reflectivity can be between 1% and 99%.
- the second surface is the transmission surface 2-2, used to correct the ambient light to adapt to the wearer’s degree.
- the positions of the reflective surface and the transmissive surface of the spherical reflective lens 2 can be interchanged.
- the radius of the spherical surface of the reflective surface is within the range of 10mm-90mm, and the radius error is less than 45% of the radius value;
- the spherical radius of the display pixel distribution in the display system 1 is within the range of 5mm-45mm, and the radius error of the display pixel distribution is less than 45% of the spherical radius value;
- the reference position of the pupil 3 is placed in front of the display system 1, and the display system 1 is set in front of it Spherical reflective lens 2, the display system 1 is located on the focal plane of the spherical reflective lens 2, the sphere centers of the display system 1 and the spherical reflective lens 2 are both near the center of the pupil 3 at the reference position, and the range is within 1 cm;
- the entrance pupil size of the system is set to 8mm, and the field of view is 90°.
- the following table lists one of the possible optical parameters:
- the transfer function value of the system obtained from the above example is shown in Fig. 2, and the transfer function value can be greater than 0.2 at 100 lp/mm. Therefore, this embodiment can obtain a very high resolution.
- the above data proves that the optical performance of this system is extremely superior, mainly because it maintains the highest symmetry.
- the Lagrangian invariant does not change with the increase of the field of view, which completely eliminates the effect of increasing the field of view on the optical system.
- the burden can reach a field of view above 100°.
- the display system 1 includes a driving motor that rotates and an electronic control system that controls its display.
- the electronic control system loads corresponding image information and drives the display pixels to emit light according to the moving position of the display system 1.
- the display system 1 is produced by rotating linear array display pixels 1-4, and the display system 1 includes pasting on a spherical transparent substrate 1-1 or a rigid linear substrate
- the driving system includes driven gears 1-7, The driving gear 1-8, the rotating bearing 1-9 and the motor 1-10;
- an electronic control system 1-5 and a control connection line 1-6 can be arranged on the base extension 1-2.
- the electronic control system 1-5 is connected to the linear array display pixel 1-4 through a control connection line.
- the outer edge of the base extension portion 1-2 is in contact with the inner edge of the rotary bearing 1-9, and the base extension portion 1-2 protrudes from the rotary bearing 1-9 by a certain length, such as 1-10mm, and the driven gear 1 is installed in the protruding portion -7.
- the outer edge of the rotary bearing 1-9 is in contact with the inner side of the outer frame 1-3, and the outer side of the outer frame 1-3 is rigidly connected with the spherical reflective lens 2 through the connector 8; the motor 1-10 is fixed on the outer frame 1-3 near the temple Position; the front end of the motor 1-10 is connected to the drive gear 1-8;
- the rotation speed of the linear array display pixels 1-4 is controlled by the motor 1-10, and the rotation speed can be monitored in real time through the drive system, and the input image can be adjusted to finally display a coherent picture.
- the width of the linear array display pixels 1-4 needs to be smaller than the diameter of the pupil of the human eye, and it can be composed of a single row or multiple rows of linear micro-pixel dot arrays.
- the light emitted by the linear array display pixels 1-4 passes through the partially reflective surface 2- 1 Reflection enters the human eye for imaging. Since the width of the linear array display pixels 1-4 is smaller than the pupil, the reflected light can enter the human eye for imaging. Obviously, the smaller the width of the linear array display pixels 1-4, the more light enters the human eye. Due to the persistence of the human eye, when more than 24 frames are displayed per second, the human eye will perceive the image to be coherent. Of course, the more images displayed per second, the more coherent the human eye will feel.
- the speed of rotation determines how many frames are displayed per second. As shown in Figure 4, if there is only one linear array displaying pixels and it rotates 12 times per second, the human eye will feel that the image is continuous. To reach 60Hz, the rotation speed is 30 times per second. Obviously, increasing the number of linear array display pixels can further reduce the required rotation speed. As shown in Figure 5, when there are two linear array display pixels arranged in a cross, the continuous rotation speed is 6 revolutions per second, and the rotation speed reaching 60Hz is 15 revolutions per second. As shown in Figure 6, when there are 4 linear array display pixels arranged in a monzi-shaped arrangement, the speed to achieve a continuous display is 3 revolutions per second, and the speed to reach 60 Hz is 7.5 revolutions per second.
- the driving gears 1-8 can be placed in the middle of the two display systems to drive the two display systems to rotate at the same time.
- the outer edge of the system base extension 1-2 is shown, and the protruding part of the rotating bearing 1-9 is provided with permanent magnets 1-11, and the outer frame 1-3 is arranged
- the stator coil 1-12a is used as a stator and does not require an additional motor drive. After the coil is energized, it forms a motor system with the arranged permanent magnets 1-11, which can rotate by itself.
- a magnetic suspension coil 1-12b is arranged on the outer frame 1-3 of the display system, and there is a space between the outer frame of the bearing and the inner side of the outer frame 1-3 of the display system.
- the magnetic levitation coil 1-12b and the stator coil 1-12a can be arranged crosswise in the outer frame 1-3.
- the connecting member 8 may be a connecting member with a curvature made of metal or non-metallic materials. Since the base extension 1-2 has no optical function, the shape is relatively flexible. In this embodiment, through the shape design of the outer frame, the outer frame 1-3 and the mirror frame 2-3 can be designed as a whole.
- the power supply mode of the electronic control system 1-5 can be: the method of using motor brushes and the power supply integrated inside the electronic control system or between the rotating part and the mirror frame, through the wireless electromagnetic induction method, to the control system powered by.
- This embodiment is another embodiment of a near-eye display optical system described in the first embodiment: including a display system 1 and a spherical reflective lens 2;
- the spherical reflective lens 2 has two surfaces.
- the first surface is a partially reflective surface 2-1, which is used to enlarge the image on the display system 1 and place it in the visible range of the human eye.
- the reflectivity can be between 1% and 99%.
- the second surface is the transmission surface 2-2, used to correct the ambient light to adapt to the wearer’s degree.
- the position of the partially reflective surface and the transmissive surface can be interchanged;
- a display system 1 is placed in front of the pupil 3 at the reference position, and a spherical reflective lens 2 is arranged in front of the display system 1.
- the display system 1 is located on the focal plane of the spherical reflective lens 2, and the sphere centers of the display system 1 and the spherical reflective lens 2 are both reference positions Near the center of the pupil 3, the range is within 1 cm;
- the display system 1 is composed of a hole-like structure array distributed on a spherical transparent substrate and an outer area of the array; the outer area of the array is the display pixel distribution area, and the light emitted by the display pixel passes through After the spherical reflective lens 2 reflects, it enters the pupil 3 at the reference position through the hole-like structure array.
- the hole-like structure array and the outer area of the array are interchangeable, that is, the hole-like structure array is used as the pixel distribution area, and the outer area of the array is used as the light-transmitting area.
- the display system 1 is composed of an array of circular holes 1-13 distributed on a spherical surface and an area 1-14 outside the circular hole array.
- the circular hole array can transmit light and environment reflected by a mirror.
- Light 4 which can be air, transparent glass or resin, or a transparent optical element that can reduce the diffraction effect.
- the area outside the array is the display pixel distribution area.
- the light emitted by the display pixel is reflected by the mirror and enters the human eye through the hole array.
- the hole array can also be a pixel distribution area, and the outside of the array is a light-transmitting area.
- the pixel area is opaque, and light cannot directly enter the human eye through the pixel to eliminate the interference of stray light.
- the display system 1 is composed of an array of square holes 1-15 distributed on a spherical surface and an area 1-16 outside the square hole array.
- the square hole array can transmit light and environment reflected by a mirror.
- Light which can be air, a transparent substance, or a transparent optical element that can reduce the diffraction effect.
- the area outside the array is the display pixel distribution area.
- the light emitted by the display pixels is reflected by the mirror and enters the human eye through the square hole array.
- the square hole array can also be a pixel distribution area, and the outside of the array is a light-transmitting area.
- the pixel area is opaque, and light cannot directly enter the human eye through the pixel to eliminate the interference of stray light.
- the display system 1 is composed of an array of polygonal holes 1-17 distributed on a spherical surface or an area 1-18 outside the polygonal hole array.
- the polygonal hole array can transmit light and environment reflected by a mirror.
- Light which can be air, a transparent substance, or a transparent optical element that can reduce the diffraction effect.
- the area outside the array is the display pixel distribution area.
- the light emitted by the display pixels is reflected by the mirror and enters the human eye through the polygonal hole array.
- the polygonal hole array can also be a pixel distribution area, and the outside of the array is a light-transmitting area.
- the pixel area is opaque, and light cannot directly enter the human eye through the pixel to eliminate the interference of stray light.
- This embodiment mode is another embodiment of a near-eye display optical system described in Embodiment Mode 1: including a display system 1, a spherical reflective lens 2 and the reference position pupil 3; in a coaxial symmetric form, the display system 1 is placed in front of the reference position pupil 3, and a spherical reflective lens 2 is arranged in front of the display system 1.
- the display system 1 is located on the focal plane of the spherical reflective lens 2, and the display system
- the spherical centers of 1 and the spherical reflective lens 2 are both near the center of the pupil 3 at the reference position, and the range is within 1 cm;
- the spherical reflective lens 2 has two surfaces, and the surface close to the display system is the partially reflective surface 2-1, which reflects The rate can be between 1%-99%.
- the surface far away from the display system is the transmissive surface 2-2, which is used to correct the ambient light to adapt to the wearer's myopia.
- the field of view of each angle is symmetrical with respect to the pupil, and the central field of view has the same display effect as other directions. Therefore, the optical performance of the system is greatly improved.
- the display system 1 is composed of a spherical transparent display screen 1-20 alone or a combination of a transparent display screen 1-20 and a dynamic light-shielding layer 1-19.
- the dynamic light-shielding layer 1-19 is located on the side close to the human eye and is pasted on Below the transparent display screen 1-20.
- the dynamic light shielding layer 1-19 can be composed of liquid crystal pixels or an array of electrochromic materials, and the existing control board can be used to output HDMI signals or VGA signals to control the light transmission or opacity of each pixel; the control board can Fixed on the temples.
- the dynamic light-shielding layer 1-19 is an opaque light-shielding area 1-19-1, and other places are transparent areas 1-19-2.
- the light emitted from the illuminated pixel toward the human eye is blocked by the light-shielding area 1-19-1 and cannot directly enter the human eye, thus blocking the stray light that directly enters the human eye.
- the light emitted from the transparent display screen 1-20 facing away from the human eye is reflected by the spherical mirror and then enters the human eye through the transparent area 1-19-2 of the transparent display screen 1-20 and the dynamic light shielding layer 1-19, due to the light shielding area 1-19
- the size of -1 is smaller than the human eye, so some of the reflected light can still enter the human eye and be perceived by the human eye.
- the size of the shading area 1-19-1 must be able to block the transparent display screen 1-20 from directly facing The light emitted by the pupil and the light emitted towards the area outside the pupil of the human eye can not be blocked.
- the positions of the reflective surface and the transmissive surface of the spherical reflective lens 2 can be interchanged.
- the radius of the spherical surface of the reflective surface is within the range of 10mm-90mm, and the radius error is less than 45% of the radius value;
- the spherical radius of the display pixel distribution in the display system 1 is within the range of 5mm-45mm, and the radius error of the display pixel distribution is less than 45% of the spherical radius value;
- the entrance pupil size of the system is set to 8mm, and the field of view is 90°.
- the following table lists one of the possible optical parameters:
- the transfer function value of the system obtained from the above example is shown in Fig. 2, and the transfer function value can be greater than 0.2 at 100 lp/mm. Therefore, this embodiment can obtain a very high resolution.
- the above data proves that the optical performance of this system is extremely superior, mainly because it maintains the highest symmetry.
- the Lagrangian invariant does not change with the increase of the field of view, which completely eliminates the effect of increasing the field of view on the optical system.
- the burden can reach a field of view above 100°.
- the near-eye display optical system provided in the present application, while using the screen and mirror to reflect and display dynamic images in spherical symmetry, can be combined with one or more existing additional structures, such as wireless communication chips, IMU sensor, image sensor, etc., make the function of AR glasses more perfect.
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Abstract
Description
表面 | 半径(mm) | 厚度(mm) | 材料 |
基准位置瞳孔3 | 无穷大 | 36 | 空气 |
部分反射面2-1 | 36 | -17.926 | 镜面 |
显示器***1 | -18.027 | - | - |
Claims (10)
- 一种近眼显示光学***,其特征是:包括显示***(1)和球面反射镜片(2);在基准位置瞳孔(3)前方放置显示***(1),显示***(1)前方放置球面反射镜片(2);所述显示***(1)中的显示像元分布在凸面上,显示***(1)中的显示像元向球面反射镜片(2)发光,球面反射镜片(2)将光线反射到基准位置瞳孔(3);利用人眼视觉暂留效应,显示***(1)通过在运动中发光产生图像,并经过球面反射镜片(2)将图像放大并反射到基准位置瞳孔(3)。
- 根据权利要求1所述的一种近眼显示光学***,其特征在于:所述显示***(1)包括使其旋转的驱动电机和控制其显示的电子控制***,电子控制***根据显示***(1)的运动位置,加载相应的图像信息并驱动显示像元发光。
- 根据权利要求1所述的一种近眼显示光学***,其特征在于:球面反射镜片(2)为球面的一部分,并允许1cm范围内的形变误差;所述球面反射镜片(2)具有两个面:第一个面为部分反射面(2-1),用于将显示***(1)上的图像放大并反射到所述基准位置瞳孔(3);第二个面为透射面(2-2),用于矫正环境光以适应佩戴者的度数;所述部分反射面和透射面的位置可以互换。
- 根据权利要求1所述的一种近眼显示光学***,其特征在于:所述显示***(1)由单个或多个线阵显示像元(1-4)在凸面上任意排布组成。
- 根据权利要求1所述的一种近眼显示光学***,其特征在于:在所述 显示***(1)靠近人眼的一侧包含透明保护薄层(7)。
- 一种近眼显示光学***,其特征是:包括显示***(1)和球面反射镜片(2);所述球面反射镜片(2)具有两个面,第一个面为部分反射面(2-1),用于将显示***(1)上的图像放大并反射到所述基准位置瞳孔(3),第二个面为透射面(2-2),用于矫正环境光以适应佩戴者的度数,部分反射面和透射面的位置可以互换;在基准位置瞳孔(3)前方放置显示***(1),显示***(1)前面设置球面反射镜片(2);所述显示***(1)由分布在球面透明基底的孔状结构阵列和阵列外区域构成;所述阵列外区域为显示像素分布区域,显示像素发出的光经由球面反射镜片(2)反射后,通过孔状结构阵列进入基准位置瞳孔(3)。
- 根据权利要求6所述的一种近眼显示光学***,其特征在于:所述孔状结构阵列与阵列外区域可互换,即:孔状结构阵列作为像素分布区域,阵列外区域作为透光区域。
- 根据权利要求7所述的一种近眼显示光学***,其特征在于:所述孔状结构阵列为圆孔阵列、椭圆孔阵列、方孔阵列或多边形孔阵列。
- 一种近眼显示光学***,其特征是:包括显示***(1)和球面反射镜片(2);在基准位置瞳孔(3)前方放置显示***(1),显示***(1)前方放置球面反射镜片(2);所述显示***(1)由透明显示屏幕(1-20)单独构成,或由动态遮光层(1-19)和透明显示屏幕(1-20)组合构成,所述动态遮光层(1-19)位于 人眼一侧,其被配置为遮挡透明显示屏幕(1-20)直接发向人眼一侧的光,并透过经过球面反射镜片(2)反射的光;所述球面反射镜片(2)具有两个面:第一个面为部分反射面(2-1),用于将显示***(1)上的图像放大并反射到基准位置瞳孔(3);第二个面为透射面(2-2),用于矫正环境光以适应佩戴者的度数;所述部分反射面和透射面的位置可以互换。
- 根据权利要求9所述的一种近眼显示光学***,其特征在于:显示***(1)中的动态遮光层(1-19)、透明显示屏幕(1-20)和球面反射镜片(2)的形状均为球面的一部分,并允许1cm范围内的形变误差。
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CN111175982B (zh) * | 2020-02-24 | 2023-01-17 | 京东方科技集团股份有限公司 | 近眼显示装置和可穿戴设备 |
CN111538157B (zh) * | 2020-05-14 | 2022-04-12 | 南昌欧菲显示科技有限公司 | Ar镜片、ar镜片的制备方法及ar眼镜 |
CN112904563A (zh) * | 2021-02-04 | 2021-06-04 | 光感(上海)科技有限公司 | 一种短焦近眼显示*** |
CN112799232A (zh) * | 2021-03-19 | 2021-05-14 | 光感(上海)科技有限公司 | 一种轻便短焦近眼显示*** |
CN113540304B (zh) * | 2021-07-08 | 2022-10-11 | 光感(上海)科技有限公司 | 一种侧发光线状显示*** |
CN113589536B (zh) * | 2021-09-14 | 2022-11-11 | 维沃移动通信有限公司 | 智能眼镜 |
CN113960797A (zh) * | 2021-10-29 | 2022-01-21 | 歌尔光学科技有限公司 | 头戴显示设备 |
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CN105652450A (zh) * | 2016-03-31 | 2016-06-08 | 高霞辉 | 图像显示装置及具有该图像显示装置的头戴显示器 |
CN207488620U (zh) * | 2017-11-16 | 2018-06-12 | 北京蚁视科技有限公司 | 一种旋转式近眼显示装置 |
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CN110780447A (zh) * | 2019-12-05 | 2020-02-11 | 杨建明 | 一种用于增强现实眼镜的光学*** |
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