WO2024037622A1 - Ar头戴式显示设备、控制方法及控制装置 - Google Patents

Ar头戴式显示设备、控制方法及控制装置 Download PDF

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Publication number
WO2024037622A1
WO2024037622A1 PCT/CN2023/113724 CN2023113724W WO2024037622A1 WO 2024037622 A1 WO2024037622 A1 WO 2024037622A1 CN 2023113724 W CN2023113724 W CN 2023113724W WO 2024037622 A1 WO2024037622 A1 WO 2024037622A1
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WIPO (PCT)
Prior art keywords
light
optical element
polarizing optical
shielding structure
head
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PCT/CN2023/113724
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English (en)
French (fr)
Inventor
张自应
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Beijing Zitiao Network Technology Co Ltd
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Beijing Zitiao Network Technology Co Ltd
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Publication of WO2024037622A1 publication Critical patent/WO2024037622A1/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
    • G02B27/01—Head-up displays

Definitions

  • the present disclosure relates to the technical field of head-mounted display devices, and in particular to an AR head-mounted display device, a control method and a control device.
  • Augmented Reality is a technology that combines virtual and real.
  • the so-called “virtual” refers to the virtual image, which is displayed by a microdisplay and amplified by optical elements and transmitted to the human eye; the so-called “real” refers to the real reality.
  • augmented reality technology is a technology that superimposes virtual images and the real world.
  • augmented reality display devices do not need to be held and have the characteristics of freeing hands, which is the main development direction of augmented reality technology.
  • Head-mounted augmented reality display devices include optical see-through type and video see-through type.
  • the optical see-through type allows the human eye to see the real world directly by receiving the light from the light-transmitting connector, and at the same time, it can also see the superimposed Virtual images in the real world are the mainstream of the development of augmented reality display technology.
  • an AR head-mounted display device including: a display module, a lens, and a processor, wherein:
  • the lens includes a stacked optical waveguide structure and a light-shielding structure
  • the light-shielding structure is located on the environmental side of the optical waveguide structure away from the user's eyes;
  • the optical waveguide structure is used to couple the light emitted by the display module to the user's eyes;
  • the working state of the light-shielding structure includes a light-shielding state and a light-transmitting state
  • the processor is electrically connected to the light-shielding structure and is used to control the light-shielding structure to switch between the light-shielding state and the light-transmitting state.
  • the present disclosure also provides a method for controlling an AR head-mounted display device.
  • the control method is suitable for
  • the display time of one frame of the AR head-mounted display device includes at least one light-transmitting period and at least one non-light-transmitting period, and the light-transmitting period and the non-light-transmitting period The light transmission periods alternate.
  • the method includes:
  • the display module is controlled not to display the virtual image and the light shielding structure is in a light transmission state
  • the display module is controlled to display a virtual image and the light-shielding structure is in a light-shielding state.
  • the present disclosure also provides an AR head-mounted display device control device.
  • the control device is suitable for the AR head-mounted display device provided in the first aspect.
  • the AR head-mounted display device displays one frame. Time includes at least one light-transmitting period and at least one non-light-transmitting period, the light-transmitting period and the non-light-transmitting period are alternately performed, and the device includes:
  • a first control module configured to control the display module not to display a virtual image and the light-shielding structure to be in a light-transmitting state during the light-transmitting period
  • the second control module is used to control the display module to display a virtual image and the light-shielding structure to be in a light-shielding state during the non-light-transmitting period.
  • the present disclosure also provides an electronic device, the electronic device including:
  • processors one or more processors
  • a storage device for storing one or more programs
  • the one or more processors When the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the AR head-mounted display device control method as described above.
  • the present disclosure also provides a computer-readable storage medium on which a computer program is stored.
  • the program is executed by a processor, the above-mentioned AR head-mounted display device control method is implemented.
  • the present disclosure also provides a computer program, including: instructions, which when executed by a processor implement the AR head-mounted display device control method as described above.
  • Figure 1 is a schematic structural diagram of an AR head-mounted display device provided by some embodiments of the present disclosure
  • Figure 2 is a timing diagram of the working process of an AR head-mounted display device applicable to Figure 1;
  • Figure 3 is a schematic structural diagram of an AR head-mounted display device provided by some embodiments of the present disclosure.
  • FIG 4 is a schematic structural diagram of the phase delay device in Figure 3;
  • Figure 5 is a timing diagram of the working process of an AR head-mounted display device provided by some embodiments of the present disclosure
  • Figure 6 is a timing diagram of the working process of an AR head-mounted display device provided by some embodiments of the present disclosure.
  • Figure 7 is a schematic structural diagram of another AR headband display device provided by some embodiments of the present disclosure.
  • Figure 8 is a flow chart of an AR head-mounted display device control method provided by some embodiments of the present disclosure.
  • Figure 9 is a schematic structural diagram of an AR head-mounted display device control device in some embodiments of the present disclosure.
  • Figure 10 is a schematic structural diagram of an electronic device in some embodiments of the present disclosure.
  • the present disclosure proposes an AR head-mounted display device, a control method and a control device.
  • FIG. 1 is a schematic structural diagram of an AR head-mounted display device provided by some embodiments of the present disclosure.
  • the AR head-mounted display device includes: a display module 20, a lens and a processor (not shown in the figure).
  • the lens includes a stacked optical waveguide structure 40 and a light-shielding structure 10 .
  • the light-shielding structure 10 is located on the environmental side of the optical waveguide structure 40 away from the eyes of the user (i.e., the wearer of the AR head-mounted display device); the optical waveguide structure 40 is used to couple the light emitted by the display module to the user (i.e., the AR head-mounted display device wearer). display device wearer) eyes.
  • FIG. 1 is a schematic structural diagram of an AR head-mounted display device provided by some embodiments of the present disclosure.
  • the AR head-mounted display device includes: a display module 20, a lens and a processor (not shown in the figure).
  • the lens includes a stacked optical waveguide structure 40 and a
  • the working state of the light-shielding structure 10 includes a light-shielding state and a light-transmitting state; the processor is electrically connected to the light-shielding structure 10 for The light-shielding structure 10 is controlled to switch between a light-shielding state and a light-transmitting state.
  • the side close to the human eye is the eye side
  • the side far away from the human eye is the environment side.
  • the light-shielding structure 10 has different light-shielding effects in the light-shielding state and the light-transmitting state. If the light-shielding structure is in a light-shielding state, the user cannot observe the real world through the light-shielding structure. If the light-shielding structure is in a light-transmitting state, users can observe the real world through the light-shielding structure. In one embodiment, the light-shielding effect of the light-shielding structure is adjusted by adjusting the light transmittance of the light-shielding structure.
  • the processor is configured to control the light-shielding structure 10 to be in a light-transmitting state when the display module 20 does not display a virtual image; and to control the light-shielding structure 10 to be in a light-shielding state when the display module 20 displays a virtual image.
  • the display module does not display the virtual image
  • the visual image of the real world formed in the human eye will not be interfered by the virtual image displayed by the display module, making the visual image of the real world very clear in the human brain.
  • other users not the wearer of the AR head-mounted display device
  • the light-shielding structure When the light-shielding structure is in a light-shielding state, the visual image of the virtual image formed in the human eye will not be interfered by external ambient light, making the virtual image highly visible and making the visual image of the virtual image clear in the human brain.
  • the light forming the virtual image will not reach the eyes of other users (non-wearers of the AR head-mounted display device) through the light-shielding structure, causing the adverse phenomenon of information leakage.
  • Figure 2 is a timing diagram of the working process of an AR head-mounted display device applicable to Figure 1.
  • the display time of one frame of the AR head-mounted display device includes at least one light-transmitting period and at least one non-light-transmitting period, the light-transmitting period and the non-light-transmitting period. Periods alternate; during the light-transmitting period, the display module does not display a virtual image, and the light-shielding structure is in a light-transmitting state; during the non-light-transmitting period, the display module displays a virtual image, and the light-shielding structure is in a light-blocking state.
  • the display time of one frame includes a light-transmitting period and a non-light-transmitting period.
  • the light-transmitting period since the light-shielding structure is in a light-transmitting state, human eyes can observe the real world through the light-shielding structure. Due to the effect of visual persistence, when the time reaches the non-light-transmitting period, the visual image of the real world is still retained in the human brain.
  • the display module displays virtual images, and the human eye can still see the display module.
  • the virtual images displayed by the group, and the visual image formed by the virtual images will also be retained in the human brain, allowing the superposition of virtual images and the real world to be realized in people's perception.
  • the display module does not display virtual images during the light transmission period, the visual image of the real world formed in the human eye will not be interfered by the virtual image displayed by the display module, making the visual image of the real world clearer in the human brain.
  • other users not the wearer of the AR head-mounted display device
  • the light-shielding structure is in a light-shielding state, so that the visual image of the virtual image formed in the human eye will not be interfered by external ambient light, making the virtual image have higher visibility, and making the visual image of the virtual image visible in the human brain. is clearer.
  • the light forming the virtual image will not reach the eyes of other users (non-wearers of the AR head-mounted display device) through the light-shielding structure, causing the adverse phenomenon of information leakage.
  • the adoption of the above technical solution can, on the one hand, improve the visibility of the virtual image and the real world, and on the other hand, it can prevent the light used to form the virtual image from being emitted to the outside world, causing the adverse phenomenon of information leakage.
  • the first period in the display time of one frame is the light transmission period. This is only a specific example of the present application and is not a limitation of the present application. In practice, in the display time of one frame, the first period may also be a non-light-transmitting period.
  • Figure 3 is a schematic structural diagram of an AR head-mounted display device provided by some embodiments of the present disclosure. See Figure 3.
  • the light-shielding structure includes a first polarizing optical element 11, a phase retardation device 12 and a second polarizing optical element 13 that are stacked in a direction from the eye side to the environment side.
  • the first polarizing optical element 11 and the second polarizing optical element 13 are both polarizing plates; or the first polarizing optical element 11 and the second polarizing optical element 13 are both polarizing light splitting films; or the first polarizing optical element 11 and the second polarizing optical element 13 are both polarizing light splitting films.
  • the optical element 11 is a polarizing light splitting film, and the second polarizing optical element 13 is a polarizing plate; or the first polarizing optical element 11 is a polarizing plate, and the second polarizing optical element 13 is a polarizing light splitting film; the polarizing light splitting film can reflect in the first direction Vibrating light simultaneously transmits light vibrating in a second direction, where the first direction is perpendicular to the second direction.
  • the polarizing light splitting film is a metal wire grid film or the like.
  • the polarization directions of the first polarizing optical element and the second polarizing optical element are parallel or perpendicular.
  • phase retardation refers to the phenomenon that the phase of light is deflected when passing through a material with biphasic or pleiotropic properties.
  • a phase retardation device refers to a device including a biphasic or pleiotropic substance.
  • the phase retardation device is a liquid crystal device.
  • FIG. 4 is a schematic structural diagram of the phase delay device in Figure 3.
  • the phase retardation device includes an upper substrate 122 and a lower substrate 121 , and a liquid crystal 123 is filled between the upper substrate 122 and the lower substrate 121 .
  • the upper substrate 122 is provided with a first electrode (not shown in FIG. 4 ), and the lower substrate 121 is provided with a second electrode (not shown in FIG. 4 ).
  • a first driving voltage signal is input to the first electrode, and a second driving voltage signal is input to the second electrode, so that a voltage difference is formed between the first electrode and the second electrode, thereby forming an electric field.
  • liquid crystal molecules are optically active, compared with non- Under the action of the electric field, the liquid crystal molecules flip, which causes the polarization direction of the polarized light irradiated on the liquid crystal molecules to change.
  • the phase retardation will
  • the device 12 rotates the polarization direction of the light irradiated thereon by 90° when the device 12 is powered off, and does not rotate the polarization direction of the light irradiating the device 12 when the device 12 is powered on.
  • the external light passes through the second polarizing optical element 13 and becomes linearly polarized light with a vibration direction parallel to the transmission axis of the second polarizing optical element 13 .
  • the polarization direction is rotated by 90° and reaches the first polarizing optical element 11 . Since the vibration direction of the linearly polarized light reaching the first polarizing optical element 11 is perpendicular to the transmission axis of the first polarizing optical element 11 , it will be absorbed by the first polarizing optical element 11 .
  • the augmented reality display module displays a virtual image
  • the light leaked from the augmented reality display module changes into linearly polarized light with a vibration direction parallel to the transmission axis of the first polarizing optical element 11 after passing through the first polarizing optical element 11.
  • the polarization direction is rotated by 90° and reaches the second polarizing optical element 13 . Since the vibration direction of the linearly polarized light reaching the second polarizing optical element 13 is perpendicular to the transmission axis of the second polarizing optical element 13 , it will be absorbed by the second polarizing optical element 13 . That is, when the phase delay device 12 is powered off, external light cannot pass through the light-shielding structure 10 , and light leaked from the augmented reality display module cannot pass through the light-shielding structure 10 .
  • the external light passes through the second polarizing optical element 13 and becomes linearly polarized light with a vibration direction parallel to the transmission axis of the second polarizing optical element 13 .
  • the polarization direction is not rotated and reaches the first polarizing optical element 11 . Since the vibration direction of the linearly polarized light reaching the first polarizing optical element 11 is parallel to the transmission axis of the first polarizing optical element 11 , it can pass through the first polarizing optical element 11 .
  • the augmented reality display module displays a virtual image
  • the light leaked from the augmented reality display module changes into linearly polarized light with a vibration direction parallel to the transmission axis of the first polarizing optical element 11 after passing through the first polarizing optical element 11.
  • the polarization direction is not rotated and reaches the second polarizing optical element 13 . Since the vibration direction of the linearly polarized light reaching the second polarizing optical element 13 is parallel to the transmission axis of the second polarizing optical element 13 , it can pass through the second polarizing optical element 13 . That is, when the phase delay device 12 is powered on, external light can pass through the light-shielding structure 10 , and light leaked from the augmented reality display module can also pass through the light-shielding structure 10 .
  • Figure 5 is a timing diagram of the working process of an AR head-mounted display device provided by some embodiments of the present disclosure.
  • the display module is controlled to be in a bright state to display the virtual image.
  • the phase delay device in the light-shielding structure is controlled to be powered off.
  • the light leakage from the augmented reality display module cannot pass through the light-shielding structure, and the outside world cannot see the light leakage from the augmented reality display module.
  • the display module is controlled to be in a dark state and cannot display virtual images.
  • the phase delay device in the light-shielding structure is controlled to be powered on.
  • the light-shielding structure is transparent.
  • the wearer can perceive external light during this period and can observe through the light-shielding structure. to the real world. But at this time, because the augmented reality display module is in a dark state, no light will leak out. In this way, the external light leakage is blocked and the external light is transmitted.
  • the visibility of the virtual image and the real world can be improved, and on the other hand, the light used to form the virtual image can be prevented from being emitted to the outside world, causing information leakage. Undesirable leakage occurs.
  • the phase retardation will The device 12 rotates the polarization direction of the light irradiated thereon by 90° when the device 12 is powered off, and does not rotate the polarization direction of the light irradiating the device 12 when the device 12 is powered on.
  • the external light passes through the second polarizing optical element 13 and becomes linearly polarized light with a vibration direction parallel to the transmission axis of the second polarizing optical element 13 .
  • the polarization direction is rotated by 90° and reaches the first polarizing optical element 11 . Since the vibration direction of the linearly polarized light reaching the first polarizing optical element 11 is parallel to the transmission axis of the first polarizing optical element 11 , it can pass through the first polarizing optical element 11 .
  • the augmented reality display module displays a virtual image
  • the light leaked from the augmented reality display module changes into linearly polarized light with a vibration direction parallel to the transmission axis of the first polarizing optical element 11 after passing through the first polarizing optical element 11.
  • the polarization direction is rotated by 90° and reaches the second polarizing optical element 13 . Since the vibration direction of the linearly polarized light reaching the second polarizing optical element 13 is parallel to the transmission axis of the second polarizing optical element 13 , it can pass through the second polarizing optical element 13 . That is, when the phase delay device 12 is powered off, external light can pass through the light-shielding structure 10 , and the light leaked from the augmented reality display module can also pass through the light-shielding structure 10 .
  • the external light passes through the second polarizing optical element 13 and becomes linearly polarized light with a vibration direction parallel to the transmission axis of the second polarizing optical element 13 .
  • the polarization direction is not rotated and reaches the first polarizing optical element 11 . Since the vibration direction of the linearly polarized light reaching the first polarizing optical element 11 is perpendicular to the transmission axis of the first polarizing optical element 11 , it will be absorbed by the first polarizing optical element 11 .
  • the augmented reality display module displays a virtual image
  • the light leaked from the augmented reality display module changes into linearly polarized light with a vibration direction parallel to the transmission axis of the first polarizing optical element 11 after passing through the first polarizing optical element 11.
  • the polarization direction is not rotated and reaches the second polarizing optical element 13 . Since the vibration direction of the linearly polarized light arriving at the second polarizing optical element 13 is different from the transmission axis of the second polarizing optical element 13 Vertically, it will be absorbed by the second polarizing optical element 13. That is, when the phase delay device 12 is powered on, external light cannot pass through the light-shielding structure 10 , and light leaked from the augmented reality display module cannot pass through the light-shielding structure 10 .
  • Figure 6 is a timing diagram of the working process of an AR head-mounted display device provided by some embodiments of the present disclosure.
  • the display module is controlled to be in a bright state to display a virtual image, and the phase delay device in the light-shielding structure is controlled to be powered on.
  • the display module is controlled to be in a dark state and cannot display virtual images.
  • the phase delay device in the light-shielding structure is controlled to be powered off.
  • the light-shielding structure is transparent.
  • the wearer can perceive the outside light during this time period and can use the light-shielding structure.
  • Structure observes the real world. But at this time, because the augmented reality display module is in a dark state, no light will leak out. In this way, the external light leakage is blocked and the external light is transmitted.
  • the visibility of the virtual image and the real world can be improved, and on the other hand, the light used to form the virtual image can be prevented from being emitted to the outside world, causing information leakage. Undesirable leakage occurs.
  • the phase retardation will The device 12 rotates the polarization direction of the light irradiating it by 90° when the device 12 is powered on, and does not rotate the polarization direction of the light irradiating it when the device 12 is powered off.
  • the external light passes through the second polarizing optical element 13 and becomes linearly polarized light with a vibration direction parallel to the transmission axis of the second polarizing optical element 13 .
  • the polarization direction is rotated by 90° and reaches the first polarizing optical element 11 . Since the vibration direction of the linearly polarized light reaching the first polarizing optical element 11 is perpendicular to the transmission axis of the first polarizing optical element 11 , it will be absorbed by the first polarizing optical element 11 .
  • the augmented reality display module displays a virtual image
  • the light leaked from the augmented reality display module changes into linearly polarized light with a vibration direction parallel to the transmission axis of the first polarizing optical element 11 after passing through the first polarizing optical element 11.
  • the polarization direction is rotated by 90° and reaches the second polarizing optical element 13 . Since the vibration direction of the linearly polarized light reaching the second polarizing optical element 13 is perpendicular to the transmission axis of the second polarizing optical element 13 , it will be absorbed by the second polarizing optical element 13 . That is, when the phase delay device 12 is powered on, external light cannot pass through the light-shielding structure 10 , and light leaked from the augmented reality display module cannot pass through the light-shielding structure 10 .
  • the external light passes through the second polarizing optical element 13 and becomes linearly polarized light with a vibration direction parallel to the transmission axis of the second polarizing optical element 13 .
  • the polarization direction is not rotated and reaches the first polarizing optical element 11 . Since the vibration direction of the linearly polarized light reaching the first polarizing optical element 11 is parallel to the transmission axis of the first polarizing optical element 11 , it can pass through the first polarizing optical element 11 Item 11.
  • the augmented reality display module displays a virtual image
  • the light leaked from the augmented reality display module changes into linearly polarized light with a vibration direction parallel to the transmission axis of the first polarizing optical element 11 after passing through the first polarizing optical element 11.
  • the polarization direction is not rotated and reaches the second polarizing optical element 13 . Since the vibration direction of the linearly polarized light reaching the second polarizing optical element 13 is parallel to the transmission axis of the second polarizing optical element 13 , it can pass through the second polarizing optical element 13 . That is, when the phase delay device 12 is powered off, external light can pass through the light-shielding structure 10 , and the light leaked from the augmented reality display module can also pass through the light-shielding structure 10 .
  • the timing diagram of the working process of the AR head-mounted display device is consistent with Figure 6.
  • the display module is controlled to be in a bright state to display a virtual image, and the phase delay device in the light-shielding structure is controlled to be powered on.
  • the display module is controlled to be in a dark state and cannot display virtual images.
  • the phase delay device in the light-shielding structure is controlled to be powered off.
  • the light-shielding structure is transparent.
  • the wearer can perceive the outside light during this time period and can use the light-shielding structure.
  • Structure observes the real world. But at this time, because the augmented reality display module is in a dark state, no light will leak out. In this way, the external light leakage is blocked and the external light is transmitted.
  • the visibility of the virtual image and the real world can be improved, and on the other hand, the light used to form the virtual image can be prevented from being emitted to the outside world, causing information leakage. Undesirable leakage occurs.
  • the phase retardation will The device 12 rotates the polarization direction of the light irradiating it by 90° when the device 12 is powered on, and does not rotate the polarization direction of the light irradiating it when the device 12 is powered off.
  • the external light passes through the second polarizing optical element 13 and becomes linearly polarized light with a vibration direction parallel to the transmission axis of the second polarizing optical element 13 .
  • the polarization direction is rotated by 90° and reaches the first polarizing optical element 11 . Since the vibration direction of the linearly polarized light reaching the first polarizing optical element 11 is parallel to the transmission axis of the first polarizing optical element 11 , it can pass through the first polarizing optical element 11 .
  • the augmented reality display module displays a virtual image
  • the light leaked from the augmented reality display module changes into linearly polarized light with a vibration direction parallel to the transmission axis of the first polarizing optical element 11 after passing through the first polarizing optical element 11.
  • the polarization direction is rotated by 90° and reaches the second polarizing optical element 13 . Since the vibration direction of the linearly polarized light reaching the second polarizing optical element 13 is parallel to the transmission axis of the second polarizing optical element 13 , it can pass through the second polarizing optical element 13 . That is, when the phase delay device 12 is powered on, external light can pass through the light-shielding structure 10 , and light leaked from the augmented reality display module can also pass through the light-shielding structure 10 .
  • the external light passes through the second polarizing optical element 13 and becomes linearly polarized light with a vibration direction parallel to the transmission axis of the second polarizing optical element 13 .
  • the polarization direction is not rotated and reaches the first polarizing optical element 11 . Since the vibration direction of the linearly polarized light reaching the first polarizing optical element 11 is perpendicular to the transmission axis of the first polarizing optical element 11 , it will be absorbed by the first polarizing optical element 11 .
  • the augmented reality display module displays a virtual image
  • the light leaked from the augmented reality display module changes into linearly polarized light with a vibration direction parallel to the transmission axis of the first polarizing optical element 11 after passing through the first polarizing optical element 11.
  • the polarization direction is not rotated and reaches the second polarizing optical element 13 . Since the vibration direction of the linearly polarized light reaching the second polarizing optical element 13 is perpendicular to the transmission axis of the second polarizing optical element 13 , it will be absorbed by the second polarizing optical element 13 . That is, when the phase delay device 12 is powered off, external light cannot pass through the light-shielding structure 10 , and light leaked from the augmented reality display module cannot pass through the light-shielding structure 10 .
  • the timing diagram of the working process of the AR head-mounted display device is consistent with Figure 5.
  • the display module is controlled to be in a bright state to display a virtual image, and the phase delay device in the light-shielding structure is controlled to be powered off.
  • the display module is controlled to be in a dark state and cannot display virtual images.
  • the phase delay device in the light-shielding structure is controlled to be energized.
  • the light-shielding structure is transparent.
  • the wearer can perceive external light during this period and can pass the light-shielding structure. Observe the real world. But at this time, because the augmented reality display module is in a dark state, no light will leak out. In this way, the external light leakage is blocked and the external light is transmitted.
  • the visibility of the virtual image and the real world can be improved, and on the other hand, the light used to form the virtual image can be prevented from being emitted to the outside world, causing information leakage. Undesirable leakage occurs.
  • the phase The delay device 12 rotates the polarization direction of the light irradiated thereon by 90° when the power is off, and does not rotate the polarization direction of the light irradiation thereon when the power is on.
  • the external light passes through the second polarizing optical element 13 and becomes linearly polarized light with a vibration direction parallel to the transmission axis of the second polarizing optical element 13 .
  • the polarization direction is rotated by 90° and reaches the first polarizing optical element 11 . Since the vibration direction of the linearly polarized light reaching the first polarizing optical element 11 is perpendicular to the transmission axis of the first polarizing optical element 11 , it will be reflected by the first polarizing optical element 11 and reach the phase retardation device 12 for the second time.
  • the polarization direction of the light reaching the phase retardation device 12 for the second time is rotated by 90° again, returns to a direction parallel to the transmission axis of the second polarization optical element 13, and then passes through the second polarization optical element 13.
  • Polarizing optical element 13 If the augmented reality display module displays a virtual image, the light leaked from the augmented reality display module changes into linearly polarized light with a vibration direction parallel to the transmission axis of the first polarizing optical element 11 after passing through the first polarizing optical element 11. After the linearly polarized light passes through the phase retardation device 12 , the polarization direction is rotated by 90° and reaches the second polarizing optical element 13 .
  • phase retardation device 12 It will be reflected by the second polarizing optical element 13 and reach the phase retardation device 12 for the second time.
  • the polarization direction of the light reaching the phase retardation device 12 for the second time is rotated by 90° again, returning to the direction parallel to the transmission axis of the first polarizing optical element 11, and then passes through the first polarizing optical element 11, passes through the lens, and reaches the human eye. and received by the human eye. That is, when the phase delay device 12 is powered off, external light cannot pass through the light-shielding structure 10, and the light leaked from the augmented reality display module will be reflected back and received by the human eye, which can enhance the brightness of the virtual image and improve the enhancement.
  • Realistic display module ’s light energy utilization rate.
  • the external light passes through the second polarizing optical element 13 and becomes linearly polarized light with a vibration direction parallel to the transmission axis of the second polarizing optical element 13 .
  • the polarization direction is not rotated and reaches the first polarizing optical element 11 . Since the vibration direction of the linearly polarized light reaching the first polarizing optical element 11 is parallel to the transmission axis of the first polarizing optical element 11 , it can pass through the first polarizing optical element 11 .
  • the augmented reality display module displays a virtual image
  • the light leaked from the augmented reality display module changes into linearly polarized light with a vibration direction parallel to the transmission axis of the first polarizing optical element 11 after passing through the first polarizing optical element 11.
  • the polarization direction is not rotated and reaches the second polarizing optical element 13 . Since the vibration direction of the linearly polarized light reaching the second polarizing optical element 13 is parallel to the transmission axis of the second polarizing optical element 13 , it can pass through the second polarizing optical element 13 . That is, when the phase delay device 12 is powered on, external light can pass through the light-shielding structure 10 , and light leaked from the augmented reality display module can also pass through the light-shielding structure 10 .
  • the timing diagram of the working process of the AR head-mounted display device is consistent with Figure 5.
  • the display module is controlled to be in a bright state to display a virtual image, and the phase delay device in the light-shielding structure is controlled to be powered off.
  • light leakage outside the augmented reality display module is not only It cannot pass through the light-shielding structure and will be reflected to the human eye and used. The outside world cannot see the external light leakage of the augmented reality display module.
  • the display module is controlled to be in a dark state and cannot display virtual images.
  • the phase delay device in the light-shielding structure is controlled to be energized.
  • the light-shielding structure is transparent.
  • the wearer can perceive external light during this period and can pass the light-shielding structure. Observe the real world. But at this time, because the augmented reality display module is in a dark state, no light will leak out. In this way, the external light leakage is blocked and the external light is transmitted.
  • the visibility of the virtual image and the real world can be improved, and on the other hand, the light used to form the virtual image can be prevented from being emitted to the outside world, causing information leakage. Undesirable leakage occurs.
  • the phase The delay device 12 rotates the polarization direction of the light irradiated thereon by 90° when the power is off, and does not rotate the polarization direction of the light irradiation thereon when the power is on.
  • the external light passes through the second polarizing optical element 13 and becomes linearly polarized light with a vibration direction parallel to the transmission axis of the second polarizing optical element 13 .
  • the polarization direction is rotated by 90° and reaches the first polarizing optical element 11 . Since the vibration direction of the linearly polarized light reaching the first polarizing optical element 11 is parallel to the transmission axis of the first polarizing optical element 11 , it can pass through the first polarizing optical element 11 .
  • the augmented reality display module displays a virtual image
  • the light leaked from the augmented reality display module changes into linearly polarized light with a vibration direction parallel to the transmission axis of the first polarizing optical element 11 after passing through the first polarizing optical element 11.
  • the polarization direction is rotated by 90° and reaches the second polarizing optical element 13 . Since the vibration direction of the linearly polarized light reaching the second polarizing optical element 13 is parallel to the transmission axis of the second polarizing optical element 13 , it can pass through the second polarizing optical element 13 . That is, when the phase delay device 12 is powered off, external light can pass through the light-shielding structure 10 , and the light leaked from the augmented reality display module can also pass through the light-shielding structure 10 .
  • the external light passes through the second polarizing optical element 13 and becomes linearly polarized light with a vibration direction parallel to the transmission axis of the second polarizing optical element 13 .
  • the polarization direction is not rotated and reaches the first polarizing optical element 11 . Since the vibration direction of the linearly polarized light reaching the first polarizing optical element 11 is perpendicular to the transmission axis of the first polarizing optical element 11 , it will be reflected by the first polarizing optical element 11 and reach the phase retardation device 12 for the second time.
  • the polarization direction of the light reaching the phase retardation device 12 for the second time is rotated by 90° again, returns to a direction parallel to the transmission axis of the second polarization optical element 13 , and then passes through the second polarization optical element 13 .
  • the augmented reality display module displays a virtual image
  • the light leaked from the augmented reality display module changes into linearly polarized light with a vibration direction parallel to the transmission axis of the first polarizing optical element 11 after passing through the first polarizing optical element 11.
  • the polarization direction is not rotated and reaches the second polarizing optical element 13 .
  • the polarization direction of the light reaching the phase retardation device 12 for the second time is rotated by 90° again, returning to the direction parallel to the transmission axis of the first polarizing optical element 11, and then passes through the first polarizing optical element 11, passes through the lens, and reaches the human eye. and received by the human eye. That is, when the phase delay device 12 is powered on, external light cannot pass through the light-shielding structure 10, and the light leaked from the augmented reality display module will be reflected back and received by the human eye, which can enhance the brightness of the virtual image and improve the augmented reality. Displays the light energy utilization rate of the module.
  • the timing diagram of the working process of the AR head-mounted display device is consistent with Figure 6.
  • the display module is controlled to be in a bright state to display the virtual image, and the phase delay device in the light-shielding structure is controlled to be powered on.
  • the light leaking outside the augmented reality display module not only cannot pass through the light-shielding structure, but also It will be reflected to the human eye and used, and the outside world cannot see the external light leakage of the augmented reality display module.
  • the display module is controlled to be in a dark state and cannot display virtual images.
  • the phase delay device in the light-shielding structure is controlled to be powered off.
  • the light-shielding structure is transparent.
  • the wearer can perceive the outside light during this time period and can use the light-shielding structure.
  • Structure observes the real world. But at this time, because the augmented reality display module is in a dark state, no light will leak out. In this way, the external light leakage is blocked and the external light is transmitted.
  • the visibility of the virtual image and the real world can be improved, and on the other hand, the light used to form the virtual image can be prevented from being emitted to the outside world, causing information leakage. Undesirable leakage occurs.
  • the phase The delay device 12 rotates the polarization direction of the light irradiated thereon by 90° when the power is on, and does not rotate the polarization direction of the light irradiation thereon when the power is off.
  • the external light passes through the second polarizing optical element 13 and becomes linearly polarized light with a vibration direction parallel to the transmission axis of the second polarizing optical element 13 .
  • the polarization direction is rotated by 90° and reaches the first polarizing optical element 11 . Since the vibration direction of the linearly polarized light reaching the first polarizing optical element 11 is perpendicular to the transmission axis of the first polarizing optical element 11 , it will be reflected by the first polarizing optical element 11 and reach the phase retardation device 12 for the second time.
  • the polarization direction of the light reaching the phase retardation device 12 for the second time is rotated by 90° again, returns to a direction parallel to the transmission axis of the second polarization optical element 13 , and then passes through the second polarization optical element 13 .
  • the augmented reality display module displays a virtual image
  • the light leaked from the augmented reality display module changes into linearly polarized light with a vibration direction parallel to the transmission axis of the first polarizing optical element 11 after passing through the first polarizing optical element 11.
  • the polarization direction is rotated by 90° and reaches the second polarizing optical element 13 .
  • the vibration direction of the linearly polarized light reaching the second polarizing optical element 13 is perpendicular to the transmission axis of the second polarizing optical element 13 , it will be reflected by the second polarizing optical element 13 and reach the phase retardation device 12 for the second time.
  • the polarization direction of the light reaching the phase retardation device 12 for the second time is rotated by 90° again, returning to the direction parallel to the transmission axis of the first polarizing optical element 11, and then passes through the first polarizing optical element 11, passes through the lens, and reaches the human eye. and received by the human eye.
  • phase delay device 12 when the phase delay device 12 is powered on, external light cannot pass through the light-shielding structure 10, and the light leaked from the augmented reality display module will be reflected back and received by the human eye, which can enhance the brightness of the virtual image and improve the augmented reality. Displays the light energy utilization rate of the module.
  • the external light passes through the second polarizing optical element 13 and becomes linearly polarized light with a vibration direction parallel to the transmission axis of the second polarizing optical element 13 .
  • the polarization direction is not rotated and reaches the first polarizing optical element 11 . Since the vibration direction of the linearly polarized light reaching the first polarizing optical element 11 is parallel to the transmission axis of the first polarizing optical element 11 , it can pass through the first polarizing optical element 11 .
  • the augmented reality display module displays a virtual image
  • the light leaked from the augmented reality display module changes into linearly polarized light with a vibration direction parallel to the transmission axis of the first polarizing optical element 11 after passing through the first polarizing optical element 11.
  • the polarization direction is not rotated and reaches the second polarizing optical element 13 . Since the vibration direction of the linearly polarized light reaching the second polarizing optical element 13 is parallel to the transmission axis of the second polarizing optical element 13 , it can pass through the second polarizing optical element 13 . That is, when the phase delay device 12 is powered off, external light can pass through the light-shielding structure 10 , and the light leaked from the augmented reality display module can also pass through the light-shielding structure 10 .
  • the timing diagram of the working process of the AR head-mounted display device is consistent with Figure 6.
  • the display module is controlled to be in a bright state to display a virtual image, and the phase delay device in the light-shielding structure is controlled to be powered on.
  • the display module is controlled to be in a dark state and cannot display virtual images.
  • the phase delay device in the light-shielding structure is controlled to be powered off.
  • the light-shielding structure is transparent.
  • the wearer can perceive the outside light during this time period and can use the light-shielding structure.
  • Structure observes the real world. But at this time, because the augmented reality display module is in a dark state, no light will leak out. In this way, the external light leakage is blocked and the external light is transmitted.
  • the visibility of the virtual image and the real world can be improved, and on the other hand, the light used to form the virtual image can be prevented from being emitted to the outside world, causing information leakage. Undesirable leakage occurs.
  • the phase The delay device 12 rotates the polarization direction of the light irradiated thereon by 90° when the power is on, and does not rotate the polarization direction of the light irradiation thereon when the power is off.
  • the external light passes through the second polarizing optical element 13 and becomes linearly polarized light with a vibration direction parallel to the transmission axis of the second polarizing optical element 13 .
  • the polarization direction is rotated by 90° and reaches the first polarizing optical element 11 . Since the vibration direction of the linearly polarized light reaching the first polarizing optical element 11 is parallel to the transmission axis of the first polarizing optical element 11 , it can pass through the first polarizing optical element 11 .
  • the augmented reality display module displays a virtual image
  • the light leaked from the augmented reality display module passes through the third A polarizing optical element 11 then becomes linearly polarized light with a vibration direction parallel to the transmission axis of the first polarizing optical element 11.
  • the polarization direction is rotated 90° and reaches the second polarizing optical element. 13. Since the vibration direction of the linearly polarized light reaching the second polarizing optical element 13 is parallel to the transmission axis of the second polarizing optical element 13 , it can pass through the second polarizing optical element 13 . That is, when the phase delay device 12 is powered on, external light can pass through the light-shielding structure 10 , and light leaked from the augmented reality display module can also pass through the light-shielding structure 10 .
  • the external light passes through the second polarizing optical element 13 and becomes linearly polarized light with a vibration direction parallel to the transmission axis of the second polarizing optical element 13 .
  • the polarization direction is not rotated and reaches the first polarizing optical element 11 . Since the vibration direction of the linearly polarized light reaching the first polarizing optical element 11 is perpendicular to the transmission axis of the first polarizing optical element 11 , it will be reflected by the first polarizing optical element 11 and reach the phase retardation device 12 for the second time.
  • the polarization direction of the light reaching the phase retardation device 12 for the second time is rotated by 90° again, returns to a direction parallel to the transmission axis of the second polarization optical element 13 , and then passes through the second polarization optical element 13 .
  • the augmented reality display module displays a virtual image
  • the light leaked from the augmented reality display module changes into linearly polarized light with a vibration direction parallel to the transmission axis of the first polarizing optical element 11 after passing through the first polarizing optical element 11.
  • the polarization direction is not rotated and reaches the second polarizing optical element 13 .
  • the vibration direction of the linearly polarized light reaching the second polarizing optical element 13 is perpendicular to the transmission axis of the second polarizing optical element 13 , it will be reflected by the second polarizing optical element 13 and reach the phase retardation device 12 for the second time.
  • the polarization direction of the light reaching the phase retardation device 12 for the second time is rotated by 90° again, returning to the direction parallel to the transmission axis of the first polarizing optical element 11, and then passes through the first polarizing optical element 11, passes through the lens, and reaches the human eye. and received by the human eye.
  • phase delay device 12 when the phase delay device 12 is powered off, external light cannot pass through the light-shielding structure 10, and the light leaked from the augmented reality display module cannot pass through the light-shielding structure 10, but will be reflected back and received by the human eye. It can enhance the brightness of virtual images and improve the light energy utilization rate of augmented reality display modules.
  • the timing diagram of the working process of the AR head-mounted display device is consistent with Figure 5.
  • the display module is controlled to be in a bright state to display a virtual image, and the phase delay device in the light-shielding structure is controlled to be powered off.
  • light leakage outside the augmented reality display module is not only It cannot pass through the light-shielding structure and will be reflected to the human eye and used. The outside world cannot see the external light leakage of the augmented reality display module.
  • the display module is controlled to be in a dark state and cannot display virtual images.
  • the phase delay device in the light-shielding structure is controlled to be energized.
  • the light-shielding structure is transparent.
  • the wearer can perceive external light during this period and can pass the light-shielding structure. Observe the real world. But at this time, because the augmented reality display module is in a dark state, no light will leak out. In this way, the external light leakage is blocked and the external light is transmitted.
  • the visibility of the virtual image and the real world can be improved, and on the other hand, the light used to form the virtual image can be prevented from being emitted to the outside world, causing information leakage. leaked Undesirable phenomena occur.
  • the optical waveguide structure in the above lens may be a waveguide lens.
  • waveguide lenses can also be replaced with Birdbath lenses or prism lenses.
  • the external light leakage of the display module will be reflected by the polarizing dichroic film. Imaging, the resulting image will produce aberrations with the image directly incident on the human eye, resulting in unclear virtual images. This problem will not occur with waveguide lenses.
  • the light-shielding structure includes a plurality of light-shielding units arranged in an array, and the working state of each light-shielding unit is independently adjustable; during the light-transmitting period, the light-shielding units located in the target area in the light-shielding structure are in a non-light-transmitting state, and are located in a non-light-transmitting state.
  • the light-shielding unit outside the target area is in a light-transmitting state; where the target area is the display area of the display module on the lens.
  • the working status of each shading unit is independently adjustable means that the working status of each shading unit can be adjusted independently, such as controlling it to adjust from a light-transmitting state to a light-blocking state, or from a light-blocking state to a light-transmitting state.
  • the target area is the projection area of the target object on the light-shielding structure, and the target object is an object included in the virtual image displayed by the display module during the non-light-transmitting period in the same frame.
  • the virtual image displayed by the display module includes at least one object, which includes but is not limited to people, objects, information display areas for human-computer interaction, controls, etc.
  • object which includes but is not limited to people, objects, information display areas for human-computer interaction, controls, etc.
  • all objects are determined as target objects, or some objects may be determined as target objects.
  • the target area refers to the area where the cone formed by taking the center of the exit pupil of the human eye or the display module as the vertex and the object in the virtual image as the base intersects with the light-shielding structure.
  • the target area refers to the area where the cone formed by taking the center of the exit pupil of the human eye or the display module as the vertex and the object in the virtual image as the base intersects with the phase delay device.
  • the virtual image displayed by the display module includes a box, based on the position of the box in the virtual image and the center of the exit pupil of the human eye or the display module as the vertex, Determine the target area corresponding to the box.
  • the display module does not display the virtual image including the box; the light-shielding units within the target area are in a light-blocking state, and the light-shielding units located outside the target area are in a light-transmitting state; during the non-light-transmitting period, the display module displays the following: This virtual image of the box; the light-blocking structure is in a light-blocking state.
  • the light-shielding units in the target area corresponding to the box are in the light-blocking state during both the non-light-transmitting period and the light-transmitting period.
  • the light-shielding units outside the target area corresponding to the box are in the light-blocking state during the non-light-transmitting period and in the light-transmitting period. Translucent state. This can avoid the problem that during the light transmission period, the real world that should be blocked by the box forms a visual image in the human eye and is retained in the human brain, resulting in an unrealistic display of the target object.
  • the target object includes a black object or an opaque object.
  • the purpose of this setting is to achieve realistic display of black objects or opaque objects.
  • the display position of each pixel in the display module on the lens is fixed. Before the display module displays a certain frame of virtual image, based on the driving signal used to drive the display module to display the frame of virtual image, it can be directly determined which areas in the light-shielding structure will be the target areas corresponding to the frame of virtual image. Rather than after the display module displays the virtual image of the frame, it is possible to obtain which areas in the light-shielding structure are the target areas corresponding to the virtual image of the frame.
  • the processor obtains a control signal for the light-shielding structure based on the driving signal; sends the driving signal to the display module, and sends the control signal to the light-shielding structure, so that the display module displays Virtual image, at the same time, the light-shielding units located within the target area in the light-shielding structure are in a non-light-transmitting state, and the light-shielding units located outside the target area are in a light-transmitting state.
  • the lens further includes a depolarizing optical element; the depolarizing optical element is located on the environmental side of the light-shielding structure.
  • Figure 7 is a schematic structural diagram of another AR headband display device provided by some embodiments of the present disclosure.
  • the depolarizing optical element 30 is located on the ambient side of the light-shielding structure 10 .
  • the depolarizing optical element includes a depolarizing plate or wave plate. Further, if the depolarizing optical element includes a wave plate, the optical axis of the wave plate and the transmission axis of the second polarizing optical element form a preset angle. The reason for this setting is that the light emitted by some mobile phone screens, TVs, monitors and other display devices is linearly polarized light. When the user wears the AR head-mounted display device, if no depolarizing optical element is provided and the vibration direction of the light emitted by the display device is perpendicular to the transmission axis of the second polarizing optical element, the light emitted by the display device cannot pass through.
  • the light-shielding structure in the AR head-mounted display device cannot enter the human eye. In other words, after wearing the AR head-mounted display device, the user cannot view display devices such as mobile phone screens, TVs, and monitors.
  • the polarization direction of linearly polarized light emitted by display devices such as mobile phone screens, TVs, and monitors can be changed, or the polarization direction of linearly polarized light emitted by display devices such as mobile phone screens, TVs, and monitors can be changed.
  • Linearly polarized light is converted into non-linearly polarized light (such as circularly polarized light, elliptically polarized light) or natural light, and then can pass through the light-shielding structure and enter the human eye, ensuring that after wearing the AR head-mounted display device, the user can watch the mobile phone screen, TV and display devices such as monitors.
  • non-linearly polarized light such as circularly polarized light, elliptically polarized light
  • Figure 8 is a flow chart of an AR head-mounted display device control method provided by some embodiments of the present disclosure. This control method is applicable to the AR head-mounted display device provided by the embodiment of the present disclosure.
  • the display time of one frame of the AR head-mounted display device includes at least one light-transmitting period and at least one non-light-transmitting period, the light-transmitting period and the non-light-transmitting period.
  • hour Sections are performed alternately; referring to Figure 8, the method includes: steps S410 to S420.
  • step S410 during the light transmission period, the display module is controlled not to display the virtual image and the light shielding structure is in a light transmission state.
  • step S420 during the non-light-transmitting period, the display module is controlled to display the virtual image and the light-shielding structure is in a light-shielding state.
  • Persistence of vision refers to the phenomenon that the vision produced by light on the retina remains for a period of time after the light stops acting.
  • the display time of one frame includes a light-transmitting period and a non-light-transmitting period.
  • the light-transmitting period since the light-shielding structure is in a light-transmitting state, human eyes can observe the real world through the light-shielding structure. Due to the effect of visual persistence, when the time reaches the non-light-transmitting period, the visual image of the real world is still retained in the human brain.
  • the display module displays the virtual image, and the human eye can still see the display.
  • the virtual image displayed by the module and the visual image formed by the virtual image will also be retained in the human brain, enabling the superposition of the virtual image and the real world in people's perception.
  • the display module does not display virtual images during the light transmission period, the visual image of the real world formed in the human eye will not be interfered by the virtual image displayed by the display module, making the visual image of the real world clearer in the human brain.
  • other users not the wearer of the AR head-mounted display device
  • the light-shielding structure is in a light-shielding state, so that the visual image of the virtual image formed in the human eye will not be interfered by external ambient light, making the virtual image have higher visibility, and making the visual image of the virtual image visible in the human brain. is clearer.
  • the light forming the virtual image will not reach the eyes of other users (non-wearers of the AR head-mounted display device) through the light-shielding structure, causing the adverse phenomenon of information leakage.
  • the light-shielding structure includes a plurality of light-shielding units arranged in an array, and the working status of each light-shielding unit is independently adjustable; during the light-transmitting period, controlling the display module not to display the virtual image and the light-shielding structure to be in a light-transmitting state includes: determining the target area , the target area is the display area of the display module on the lens; during the light transmission period, the light-shielding unit located in the target area in the control light-shielding structure is in a non-light-transmitting state, and the light-shielding unit located outside the target area is in a light-transmitting state.
  • FIG. 9 is a schematic structural diagram of an AR head-mounted display device control device in some embodiments of the present disclosure.
  • the AR head-mounted display device control device provided by the embodiment of the present disclosure is suitable for the AR head-mounted display device provided by the embodiment of the present disclosure.
  • the display time of one frame of the AR head-mounted display device includes at least one light-transmitting period and at least one non-light-transmitting period, and the light-transmitting period and the non-light-transmitting period are alternately performed.
  • the AR head-mounted display device control device specifically includes:
  • the first control module 510 is used to control the display module not to display a virtual image and the light-shielding structure to be in a light-transmitting state during the light-transmitting period;
  • the second control module 520 is used to control the display module to display a virtual image and the light-shielding structure to be in a light-shielding state during the non-light-transmitting period.
  • the light-shielding structure includes a plurality of light-shielding units arranged in an array, and the light-shielding effect of each of the light-shielding units is independently adjustable; the first control module is used to: determine a target area, and the target area is the display module the display area on the lens; during the light transmission period, the light-shielding unit located in the target area in the light-shielding structure is controlled to be in a non-light-transmitting state, and the light-shielding unit located outside the target area In a light-transmitting state.
  • the AR head-mounted display device control device provided by the embodiments of the present disclosure can execute the steps of the AR head-mounted display device control method provided by the method embodiments of the present disclosure, and has the same or corresponding beneficial effects, which will not be described again here.
  • FIG. 10 is a schematic structural diagram of an electronic device in an embodiment of the present disclosure.
  • the electronic device 1000 in the embodiment of the present disclosure may include, but is not limited to, mobile phones, laptops, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablets), PMPs (portable multimedia players), vehicle-mounted terminals ( Mobile terminals such as vehicle navigation terminals), wearable electronic devices, etc., and fixed terminals such as digital TVs, desktop computers, smart home devices, etc.
  • the electronic device shown in FIG. 10 is only an example and should not impose any limitations on the functions and scope of use of the embodiments of the present disclosure.
  • the electronic device 1000 may include a processing device (eg, central processing unit, graphics processor, etc.) 1001 , which may be loaded into a random access device according to a program stored in a read-only memory (ROM) 1002 or from a storage device 1008 .
  • the program in the memory (RAM) 1003 performs various appropriate actions and processes to implement the AR head-mounted display device control method according to the embodiments of the present disclosure.
  • RAM 1003 there are also stored electrical Various programs and information required for the operation of the sub-device 1000.
  • the processing device 1001, the ROM 1002 and the RAM 1003 are connected to each other via a bus 1004.
  • An input/output (I/O) interface 1005 is also connected to bus 1004.
  • the following devices may be connected to the I/O interface 1005: input devices 1006 including, for example, a touch screen, touch pad, keyboard, mouse, camera, microphone, accelerometer, gyroscope, etc.; including, for example, a liquid crystal display (LCD), speakers, vibration An output device 1007 such as a computer; a storage device 1008 including a magnetic tape, a hard disk, etc.; and a communication device 1009.
  • the communication device 1009 may allow the electronic device 1000 to communicate wirelessly or wiredly with other devices to exchange information.
  • FIG. 10 illustrates electronic device 1000 with various means, it should be understood that implementation or availability of all illustrated means is not required. More or fewer means may alternatively be implemented or provided.
  • embodiments of the present disclosure include a computer program product, which includes a computer program carried on a non-transitory computer-readable medium, the computer program including program code for executing the method shown in the flowchart, thereby achieving the above The AR head-mounted display device control method.
  • the computer program may be downloaded and installed from the network via the communication device 1009, or from the storage device 1008, or from the ROM 1002.
  • the processing device 1001 the above-mentioned functions defined in the method of the embodiment of the present disclosure are performed.
  • the computer-readable medium mentioned above in the present disclosure may be a computer-readable signal medium or a computer-readable storage medium, or any combination of the above two.
  • the computer-readable storage medium may be, for example, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or any combination thereof. More specific examples of computer readable storage media may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard drive, random access memory (RAM), read only memory (ROM), removable Programmd read-only memory (EPROM or flash memory), fiber optics, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above.
  • a computer-readable storage medium may be any tangible medium that contains or stores a program for use by or in connection with an instruction execution system, apparatus, or device.
  • a computer-readable signal medium may include an information signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code therein. Such propagated information signals may take many forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above.
  • a computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device .
  • Program code contained on a computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wire, optical cable, RF (radio frequency), etc. etc., or any suitable combination of the above.
  • the client and server can communicate using any known or future developed network protocol such as HTTP (HyperText Transfer Protocol), and can communicate with digital information in any form or medium (e.g., communications network) interconnection.
  • HTTP HyperText Transfer Protocol
  • communications networks include local area networks (“LAN”), wide area networks (“WAN”), the Internet (e.g., the Internet), and end-to-end networks (e.g., ad hoc end-to-end networks), as well as any known or future developed network.
  • the above-mentioned computer-readable medium may be included in the above-mentioned electronic device; it may also exist independently without being assembled into the electronic device.
  • the above-mentioned computer-readable medium carries one or more programs.
  • the electronic device executes the above-mentioned one or more programs.
  • the display module is controlled not to display the virtual image and the light shielding structure is in a light transmission state
  • the display module is controlled to display a virtual image and the light-shielding structure is in a light-shielding state.
  • the electronic device when one or more of the above programs are executed by the electronic device, the electronic device may also perform other steps described in the above embodiments.
  • Computer program code for performing the operations of the present disclosure may be written in one or more programming languages, including but not limited to object-oriented programming languages—such as Java, Smalltalk, C++, and Includes conventional procedural programming languages—such as "C” or similar programming languages.
  • the program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server.
  • the remote computer can be connected to the user's computer through any kind of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (such as an Internet service provider through Internet connection).
  • LAN local area network
  • WAN wide area network
  • Internet service provider such as an Internet service provider through Internet connection
  • each block in the flowchart or block diagram may represent a module, segment, or portion of code that contains one or more logic functions that implement the specified executable instructions.
  • the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown one after another may actually execute substantially in parallel, and they may sometimes execute in reverse order, This depends on the functionality involved.
  • each block of the block diagram and/or flowchart illustration, and combinations of blocks in the block diagram and/or flowchart illustration can be implemented by special purpose hardware-based systems that perform the specified functions or operations. , or can be implemented using a combination of specialized hardware and computer instructions.
  • the units involved in the embodiments of the present disclosure can be implemented in software or hardware. Among them, the name of a unit does not constitute a limitation on the unit itself under certain circumstances.
  • FPGAs Field Programmable Gate Arrays
  • ASICs Application Specific Integrated Circuits
  • ASSPs Application Specific Standard Products
  • SOCs Systems on Chips
  • CPLD Complex Programmable Logical device
  • a machine-readable medium may be a tangible medium that may contain or store a program for use by or in connection with an instruction execution system, apparatus, or device.
  • the machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium.
  • Machine-readable media may include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or devices, or any suitable combination of the foregoing.
  • machine-readable storage media would include one or more wire-based electrical connections, laptop disks, hard drives, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above.
  • RAM random access memory
  • ROM read only memory
  • EPROM or flash memory erasable programmable read only memory
  • CD-ROM portable compact disk read-only memory
  • magnetic storage device or any suitable combination of the above.
  • the present disclosure provides an electronic device, including:
  • processors one or more processors
  • Memory used to store one or more programs
  • the one or more processors are caused to implement any of the AR head-mounted display device control methods provided by this disclosure.
  • the present disclosure provides a computer-readable storage medium with a computer program stored thereon.
  • the program is executed by a processor, the AR head as described in any one provided by the present disclosure is implemented.
  • Wearable display device control method is implemented.
  • Embodiments of the present disclosure also provide a computer program product.
  • the computer program product includes a computer program or instructions. When the computer program or instructions are executed by a processor, the above-mentioned AR head-mounted display device control method is implemented.

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Abstract

本公开涉及一种AR头戴式显示设备、控制方法及控制装置，该显示设备包括：显示模组、镜片以及处理器，其中：所述镜片包括层叠设置的光波导结构和遮光结构；所述遮光结构位于所述光波导结构的远离用户眼睛的环境侧；所述光波导结构用于将所述显示模组发出的光耦合到用户眼睛；所述遮光结构的工作状态包括遮光状态和透光状态；所述处理器与所述遮光结构电连接，用于控制所述遮光结构在所述遮光状态和所述透光状态之间进行切换。

Description

AR头戴式显示设备、控制方法及控制装置
相关申请的交叉引用
本申请是以CN申请号为202210992832.0，申请日为2022年8月18日的申请为基础，并主张其优先权，该CN申请的公开内容在此作为整体引入本申请中。
技术领域
本公开涉及头戴式显示设备技术领域，尤其涉及一种AR头戴式显示设备、控制方法及控制装置。
背景技术
增强现实(Augmented Reality，AR)是一种虚实结合的技术，所谓“虚”就是虚拟的图像，由微显示器显示并经过光学元件放大、传输到达人眼的图像；所谓“实”就是真实的现实环境，增强现实技术就是一种将虚拟图像和现实世界叠加的技术。
目前由于头戴式增强现实显示设备无需手持，具备解放双手的特性，是目前增强现实技术的主要发展方向。
头戴式增强现实显示装置包括光学透视式和视频透视式两种，其中，光学透视式是让人眼直接通过接收透光接合器的光线，看到真实的世界，同时也能看到叠加到真实世界上的虚拟图像，是增强现实显示技术发展的主流。
发明内容
第一方面，本公开提供了一种AR头戴式显示设备，包括：显示模组、镜片以及处理器，其中：
所述镜片包括层叠设置的光波导结构和遮光结构；
所述遮光结构位于所述光波导结构的远离用户眼睛的环境侧；
所述光波导结构用于将所述显示模组发出的光耦合到用户眼睛；
所述遮光结构的工作状态包括遮光状态和透光状态；
所述处理器与所述遮光结构电连接，用于控制所述遮光结构在所述遮光状态和所述透光状态之间进行切换。
第二方面，本公开还提供了一种AR头戴式显示设备控制方法，所述控制方法适 用于第一方面提供的AR头戴式显示设备，所述AR头戴式显示设备一帧的显示时间包括至少一个透光时段以及至少一个非透光时段，所述透光时段以及所述非透光时段交替进行，
该方法包括：
在所述透光时段，控制所述显示模组不显示虚拟图像以及所述遮光结构处于透光状态；
在所述非透光时段，控制所述显示模组显示虚拟图像以及所述遮光结构处于遮光状态。
第三方面，本公开还提供了一种AR头戴式显示设备控制装置，所述控制装置适用于第一方面提供的AR头戴式显示设备，所述AR头戴式显示设备一帧的显示时间包括至少一个透光时段以及至少一个非透光时段，所述透光时段以及所述非透光时段交替进行，该装置包括：
第一控制模块，用于在所述透光时段，控制所述显示模组不显示虚拟图像以及所述遮光结构处于透光状态；
第二控制模块，用于在所述非透光时段，控制所述显示模组显示虚拟图像以及所述遮光结构处于遮光状态。
第四方面，本公开还提供了一种电子设备，所述电子设备包括：
一个或多个处理器；
存储装置，用于存储一个或多个程序；
当所述一个或多个程序被所述一个或多个处理器执行，使得所述一个或多个处理器实现如上所述的AR头戴式显示设备控制方法。
第五方面，本公开还提供了一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现如上所述的AR头戴式显示设备控制方法。
第六方面，本公开还提供了一种计算机程序，包括：指令，所述指令被处理器执行时实现如上所述的AR头戴式显示设备控制方法。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施例，并与说明书一起用于解释本公开的原理。
为了更清楚地说明本公开实施例或现有技术中的技术方案，下面将对实施例或现 有技术描述中所需要使用的附图作简单地介绍，显而易见地，对于本领域普通技术人员而言，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为本公开一些实施例提供的一种AR头戴式显示设备的结构示意图；
图2为适用于图1的一种AR头戴式显示设备工作过程的时序图；
图3为本公开一些实施例提供的一种AR头戴式显示设备的结构示意图；
图4为图3中相位延迟器件的结构示意图；
图5为本公开一些实施例提供的一种AR头戴式显示设备工作过程的时序图；
图6为本公开一些实施例提供的一种AR头戴式显示设备工作过程的时序图；
图7为本公开一些实施例提供的另一种AR头带式显示设备的结构示意图；
图8为本公开一些实施例提供的一种AR头戴式显示设备控制方法的流程图；
图9为本公开一些实施例中的一种AR头戴式显示设备控制装置的结构示意图；
图10为本公开一些实施例中的一种电子设备的结构示意图。
具体实施方式
为了能够更清楚地理解本公开的上述目的、特征和优点，下面将对本公开的方案进行进一步描述。需要说明的是，在不冲突的情况下，本公开的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本公开，但本公开还可以采用其他不同于在此描述的方式来实施；显然，说明书中的实施例只是本公开的一部分实施例，而不是全部的实施例。
发明人发现：目前的光学透视式增强现实显示装置均有一部分光线发射至外界，存在漏光现象，存在信息泄露的风险。为解决上述技术问题或至少部分的解决上述技术问题，本公开提出一种AR头戴式显示设备、控制方法及控制装置。
图1为本公开一些实施例提供的一种AR头戴式显示设备的结构示意图。参见图1，该AR头戴式显示设备包括：显示模组20、镜片以及处理器(图中未示出)。镜片包括层叠设置的光波导结构40和遮光结构10。遮光结构10位于光波导结构40的远离用户(即该AR头戴式显示设备佩戴者)眼睛的环境侧；光波导结构40用于将显示模组发出的光耦合到用户(即该AR头戴式显示设备佩戴者)眼睛。图1中利用带箭头的线描绘了当显示模组20显示虚拟图像时，从显示模组出射的光线的传播路径。遮光结构10的工作状态包括遮光状态和透光状态；处理器与遮光结构10电连接，用于 控制遮光结构10在遮光状态和透光状态之间进行切换。
当用户佩戴该AR头戴式显示设备时，靠近人眼的一侧为眼睛侧，远离人眼的一侧为环境侧。
遮光结构10在遮光状态和透光状态下的遮光效果不同。若遮光结构处于遮光状态，用户无法通过遮光结构观察到真实世界。如果遮光结构处于透光状态，用户可以通过遮光结构观察到真实世界。在一个实施例中，通过调节遮光结构的光线透过率来调整遮光结构的遮光效果。
在一些实施例中，处理器用于在显示模组20不显示虚拟图像时，控制遮光结构10处于透光状态；在显示模组20显示虚拟图像时，控制遮光结构10处于遮光状态。
由于在显示模组不显示虚拟图像时，人眼中形成的真实世界的视觉形象不会被显示模组显示的虚拟图像所干扰，使得真实世界的视觉形象在人脑中很清晰。此外，其他用户(非该AR头戴式显示设备佩戴者)也不会透过遮光结构观察到显示模组显示的虚拟图像。当遮光结构处于遮光状态，使得人眼中形成的虚拟图像的视觉形象不会被外界环境光所干扰，使得虚拟图像具有较高的可见度，可以使得虚拟图像的视觉形象在人脑中很清晰。同时，形成虚拟图像的光线也不会通过遮光结构到达其他用户(非该AR头戴式显示设备佩戴者)眼中，造成信息泄露的不良现象出现。
图2为适用于图1的一种AR头戴式显示设备工作过程的时序图。在上述技术方案的基础上，在一些实施例中，参见图2，AR头戴式显示设备一帧的显示时间包括至少一个透光时段以及至少一个非透光时段，透光时段以及非透光时段交替进行；在透光时段，显示模组不显示虚拟图像，遮光结构处于透光状态；在非透光时段，显示模组显示虚拟图像，遮光结构处于遮光状态。
人的视觉具有视觉暂留的特性，具体而言，视觉暂留是指光对视网膜所产生的视觉在光停止作用后，仍保留一段时间的现象。参见图2，在一些实施例中，一帧的显示时间包括一个透光时段以及一个非透光时段。在透光时段，由于遮光结构处于透光状态，人眼可以通过遮光结构观察到真实世界。由于视觉暂留的作用，当时间达到非透光时段，真实世界的视觉形象还保留在人的大脑中，同时由于非透光时段，显示模组显示虚拟图像，人眼还能够看到显示模组所显示的虚拟图像，由虚拟图像形成的视觉形象也会保留在人的大脑中，使得在人的观感上实现虚拟图像和现实世界的叠加。
由于在透光时段，显示模组不显示虚拟图像，人眼中形成的真实世界的视觉形象不会被显示模组显示的虚拟图像所干扰，使得真实世界的视觉形象在人脑中更加清晰。 此外，其他用户(非该AR头戴式显示设备佩戴者)也不会透过遮光结构观察到显示模组显示的虚拟图像。在非透光时段，遮光结构处于遮光状态，使得人眼中形成的虚拟图像的视觉形象不会被外界环境光所干扰，使得虚拟图像具有较高的可见度，可以使得虚拟图像的视觉形象在人脑中更加清晰。同时，形成虚拟图像的光线也不会通过遮光结构到达其他用户(非该AR头戴式显示设备佩戴者)眼中，造成信息泄露的不良现象出现。
因此，采用上述技术方案一方面可以提高虚拟图像以及真实世界的可见度，另一方面可以避免用于形成虚拟图像的光线发射至外界，造成信息泄露的不良现象出现。
在上述技术方案中，一帧的显示时间中第一个时段为透光时段，这仅是本申请的一个具体示例，而不是对本申请的限制。在实际中，一帧的显示时间中，第一个时段也可以为非透光时段。
遮光结构的具体设置方式有多种，本申请对此不作限制。图3为本公开一些实施例提供的一种AR头戴式显示设备的结构示意图。参见图3。遮光结构包括沿由眼睛侧指向环境侧方向，层叠设置的第一偏振光学元件11、相位延迟器件12以及第二偏振光学元件13。
在一些实施例中，第一偏振光学元件11和第二偏振光学元件13均为偏振片；或者，第一偏振光学元件11和第二偏振光学元件13均为偏振分光膜；或者，第一偏振光学元件11为偏振分光膜，第二偏振光学元件13为偏振片；或者，第一偏振光学元件11为偏振片，第二偏振光学元件13为偏振分光膜；偏振分光膜可以反射在第一方向振动的光，同时透过在第二方向振动的光，其中第一方向与第二方向垂直。在一些实施例中，偏振分光膜为金属线栅膜等。
在一些实施例中，第一偏振光学元件和第二偏振光学元件的偏振方向平行或垂直。
其中，相位延迟是指光的相位在透过具有二相性或多向性的物质时发生偏转所产生的相位的延后的现象。相位延迟器件是指包括二相性或多向性的物质的器件。在一些实施例中，相位延迟器件为液晶器件。
图4为图3中相位延迟器件的结构示意图。参见图4，该相位延迟器件包括上基板122和下基板121，上基板122和下基板121之间填充有液晶123。上基板122上设置有第一电极(图4中未示出)，下基板121上设置有第二电极(图4中未示出)。向第一电极输入第一驱动电压信号，向第二电极输入第二驱动电压信号，使得第一电极和第二电极之间形成电压差，进而形成电场。由于液晶分子具有旋光性，相较于无 电场，在该电场的作用下，液晶分子发生翻转，会使得照射在液晶分子上的偏振光的偏振方向发生变化。
下面结合具体示例对遮光结构的具体结构以及原理进行详细说明。
示例一
参见图3，若第一偏振光学元件11和第二偏振光学元件13均为偏振片，且第一偏振光学元件11的透光轴与第二偏振光学元件13的透光轴互相平行，相位延迟器件12在断电状态对照射在其上的光线的偏振方向旋转90°，通电时不对照射在其上光线的偏振方向进行旋转。
相位延迟器件12断电的情况下，外界光透过第二偏振光学元件13后变为振动方向平行于第二偏振光学元件13透光轴的线偏振光。该线偏振光透过相位延迟器件12后，偏振方向旋转90°，到达第一偏振光学元件11。由于到达第一偏振光学元件11的线偏振光的振动方向与第一偏振光学元件11透光轴垂直，其会被第一偏振光学元件11吸收。如果增强现实显示模组显示虚拟图像，增强现实显示模组外漏的光，透过第一偏振光学元件11后变为振动方向平行于第一偏振光学元件11透光轴的线偏振光，该线偏振光透过相位延迟器件12后，偏振方向旋转90°，到达第二偏振光学元件13。由于到达第二偏振光学元件13的线偏振光的振动方向与第二偏振光学元件13透光轴垂直，其会被第二偏振光学元件13吸收。即在相位延迟器件12断电的情况下，外界光无法透过遮光结构10，增强现实显示模组外漏的光也无法透过遮光结构10。
相位延迟器件12通电的情况下，外界光透过第二偏振光学元件13后变为振动方向平行于第二偏振光学元件13透光轴的线偏振光。该线偏振光透过相位延迟器件12后，偏振方向不旋转，到达第一偏振光学元件11。由于到达第一偏振光学元件11的线偏振光的振动方向与第一偏振光学元件11透光轴平行，其可穿过第一偏振光学元件11。如果增强现实显示模组显示虚拟图像，增强现实显示模组外漏的光，透过第一偏振光学元件11后变为振动方向平行于第一偏振光学元件11透光轴的线偏振光，该线偏振光透过相位延迟器件12后，偏振方向不旋转，到达第二偏振光学元件13。由于到达第二偏振光学元件13的线偏振光的振动方向与第二偏振光学元件13透光轴平行，其可穿过第二偏振光学元件13。即在相位延迟器件12通电的情况下，外界光可以透过遮光结构10，增强现实显示模组外漏的光也可以透过遮光结构10。
图5为本公开一些实施例提供的一种AR头戴式显示设备工作过程的时序图。参见图5，在一帧的显示时间内，在非透光时段，控制显示模组成亮态，以显示虚拟图 像，控制遮光结构中相位延迟器件断电，此时增强现实显示模组外漏光无法透过遮光结构，外界也无法看到增强现实显示模组的外漏光。在透光时段，控制显示模组成暗态，无法显示虚拟图像，控制遮光结构中相位延迟器件通电，此时遮光结构透光，佩戴者可以在该时间段感知到外界光，可通过遮光结构观察到真实世界。但此时因增强现实显示模组为暗态，不会向外漏光。通过此种方式实现了对外漏光的遮挡和对外界光的透过，进而达到一方面可以提高虚拟图像以及真实世界的可见度，另一方面可以避免用于形成虚拟图像的光线发射至外界，造成信息泄露的不良现象出现。
示例二
参见图3，若第一偏振光学元件11和第二偏振光学元件13均为偏振片，且第一偏振光学元件11的透光轴与第二偏振光学元件13的透光轴互相垂直，相位延迟器件12在断电状态对照射在其上的光线的偏振方向旋转90°，通电时不对照射在其上光线的偏振方向进行旋转。
相位延迟器件12断电的情况下，外界光透过第二偏振光学元件13后变为振动方向平行于第二偏振光学元件13透光轴的线偏振光。该线偏振光透过相位延迟器件12后，偏振方向旋转90°，到达第一偏振光学元件11。由于到达第一偏振光学元件11的线偏振光的振动方向与第一偏振光学元件11透光轴平行，其可以穿过第一偏振光学元件11。如果增强现实显示模组显示虚拟图像，增强现实显示模组外漏的光，透过第一偏振光学元件11后变为振动方向平行于第一偏振光学元件11透光轴的线偏振光，该线偏振光透过相位延迟器件12后，偏振方向旋转90°，到达第二偏振光学元件13。由于到达第二偏振光学元件13的线偏振光的振动方向与第二偏振光学元件13透光轴平行，其可以穿过第二偏振光学元件13。即在相位延迟器件12断电的情况下，外界光可以透过遮光结构10，增强现实显示模组外漏的光也可以透过遮光结构10。
相位延迟器件12通电的情况下，外界光透过第二偏振光学元件13后变为振动方向平行于第二偏振光学元件13透光轴的线偏振光。该线偏振光透过相位延迟器件12后，偏振方向不旋转，到达第一偏振光学元件11。由于到达第一偏振光学元件11的线偏振光的振动方向与第一偏振光学元件11透光轴垂直，其会被第一偏振光学元件11吸收。如果增强现实显示模组显示虚拟图像，增强现实显示模组外漏的光，透过第一偏振光学元件11后变为振动方向平行于第一偏振光学元件11透光轴的线偏振光，该线偏振光透过相位延迟器件12后，偏振方向不旋转，到达第二偏振光学元件13。由于到达第二偏振光学元件13的线偏振光的振动方向与第二偏振光学元件13透光轴 垂直，其会被第二偏振光学元件13吸收。即在相位延迟器件12通电的情况下，外界光无法透过遮光结构10，增强现实显示模组外漏的光也无法透过遮光结构10。
图6为本公开一些实施例提供的一种AR头戴式显示设备工作过程的时序图。参见图6，在一帧的显示时间内，在非透光时段，控制显示模组成亮态，以显示虚拟图像，控制遮光结构中相位延迟器件通电，此时增强现实显示模组外漏光无法透过遮光结构，外界也无法看到增强现实显示模组的外漏光。在透光时段，控制显示模组成暗态，无法显示虚拟图像，控制遮光结构中相位延迟器件断电，此时遮光结构透光，佩戴者可以在该时间段感知到外界的光，可通过遮光结构观察到真实世界。但此时因增强现实显示模组为暗态，不会向外漏光。通过此种方式实现了对外漏光的遮挡和对外界光的透过，进而达到一方面可以提高虚拟图像以及真实世界的可见度，另一方面可以避免用于形成虚拟图像的光线发射至外界，造成信息泄露的不良现象出现。
示例三
参见图3，若第一偏振光学元件11和第二偏振光学元件13均为偏振片，且第一偏振光学元件11的透光轴与第二偏振光学元件13的透光轴互相平行，相位延迟器件12在通电状态对照射在其上的光线的偏振方向旋转90°，断电时不对照射在其上光线的偏振方向进行旋转。
相位延迟器件12通电的情况下，外界光透过第二偏振光学元件13后变为振动方向平行于第二偏振光学元件13透光轴的线偏振光。该线偏振光透过相位延迟器件12后，偏振方向旋转90°，到达第一偏振光学元件11。由于到达第一偏振光学元件11的线偏振光的振动方向与第一偏振光学元件11透光轴垂直，其会被第一偏振光学元件11吸收。如果增强现实显示模组显示虚拟图像，增强现实显示模组外漏的光，透过第一偏振光学元件11后变为振动方向平行于第一偏振光学元件11透光轴的线偏振光，该线偏振光透过相位延迟器件12后，偏振方向旋转90°，到达第二偏振光学元件13。由于到达第二偏振光学元件13的线偏振光的振动方向与第二偏振光学元件13透光轴垂直，其会被第二偏振光学元件13吸收。即在相位延迟器件12通电的情况下，外界光无法透过遮光结构10，增强现实显示模组外漏的光也无法透过遮光结构10。
相位延迟器件12断电的情况下，外界光透过第二偏振光学元件13后变为振动方向平行于第二偏振光学元件13透光轴的线偏振光。该线偏振光透过相位延迟器件12后，偏振方向不旋转，到达第一偏振光学元件11。由于到达第一偏振光学元件11的线偏振光的振动方向与第一偏振光学元件11透光轴平行，其可穿过第一偏振光学元 件11。如果增强现实显示模组显示虚拟图像，增强现实显示模组外漏的光，透过第一偏振光学元件11后变为振动方向平行于第一偏振光学元件11透光轴的线偏振光，该线偏振光透过相位延迟器件12后，偏振方向不旋转，到达第二偏振光学元件13。由于到达第二偏振光学元件13的线偏振光的振动方向与第二偏振光学元件13透光轴平行，其可穿过第二偏振光学元件13。即在相位延迟器件12断电的情况下，外界光可以透过遮光结构10，增强现实显示模组外漏的光也可以透过遮光结构10。
此种情况下，AR头戴式显示设备工作过程的时序图与图6一致。参见图6，在一帧的显示时间内，在非透光时段，控制显示模组成亮态，以显示虚拟图像，控制遮光结构中相位延迟器件通电，此时增强现实显示模组外漏光无法透过遮光结构，外界也无法看到增强现实显示模组的外漏光。在透光时段，控制显示模组成暗态，无法显示虚拟图像，控制遮光结构中相位延迟器件断电，此时遮光结构透光，佩戴者可以在该时间段感知到外界的光，可通过遮光结构观察到真实世界。但此时因增强现实显示模组为暗态，不会向外漏光。通过此种方式实现了对外漏光的遮挡和对外界光的透过，进而达到一方面可以提高虚拟图像以及真实世界的可见度，另一方面可以避免用于形成虚拟图像的光线发射至外界，造成信息泄露的不良现象出现。
示例四
参见图3，若第一偏振光学元件11和第二偏振光学元件13均为偏振片，且第一偏振光学元件11的透光轴与第二偏振光学元件13的透光轴互相垂直，相位延迟器件12在通电状态对照射在其上的光线的偏振方向旋转90°，断电时不对照射在其上光线的偏振方向进行旋转。
相位延迟器件12通电的情况下，外界光透过第二偏振光学元件13后变为振动方向平行于第二偏振光学元件13透光轴的线偏振光。该线偏振光透过相位延迟器件12后，偏振方向旋转90°，到达第一偏振光学元件11。由于到达第一偏振光学元件11的线偏振光的振动方向与第一偏振光学元件11透光轴平行，其可以穿过第一偏振光学元件11。如果增强现实显示模组显示虚拟图像，增强现实显示模组外漏的光，透过第一偏振光学元件11后变为振动方向平行于第一偏振光学元件11透光轴的线偏振光，该线偏振光透过相位延迟器件12后，偏振方向旋转90°，到达第二偏振光学元件13。由于到达第二偏振光学元件13的线偏振光的振动方向与第二偏振光学元件13透光轴平行，其可以穿过第二偏振光学元件13。即在相位延迟器件12通电的情况下，外界光可以透过遮光结构10，增强现实显示模组外漏的光也可以透过遮光结构10。
相位延迟器件12断电的情况下，外界光透过第二偏振光学元件13后变为振动方向平行于第二偏振光学元件13透光轴的线偏振光。该线偏振光透过相位延迟器件12后，偏振方向不旋转，到达第一偏振光学元件11。由于到达第一偏振光学元件11的线偏振光的振动方向与第一偏振光学元件11透光轴垂直，其会被第一偏振光学元件11吸收。如果增强现实显示模组显示虚拟图像，增强现实显示模组外漏的光，透过第一偏振光学元件11后变为振动方向平行于第一偏振光学元件11透光轴的线偏振光，该线偏振光透过相位延迟器件12后，偏振方向不旋转，到达第二偏振光学元件13。由于到达第二偏振光学元件13的线偏振光的振动方向与第二偏振光学元件13透光轴垂直，其会被第二偏振光学元件13吸收。即在相位延迟器件12断电的情况下，外界光无法透过遮光结构10，增强现实显示模组外漏的光也无法透过遮光结构10。
此种情况下，AR头戴式显示设备工作过程的时序图与图5一致。参见图5，在一帧的显示时间内，在非透光时段，控制显示模组成亮态，以显示虚拟图像，控制遮光结构中相位延迟器件断电，此时增强现实显示模组外漏光无法透过遮光结构，外界也无法看到增强现实显示模组的外漏光。在透光时段，控制显示模组成暗态，无法显示虚拟图像，控制遮光结构中相位延迟器件通电，此时遮光结构透光，佩戴者可以在该时间段感知到外界的光，可通过遮光结构观察到真实世界。但此时因增强现实显示模组为暗态，不会向外漏光。通过此种方式实现了对外漏光的遮挡和对外界光的透过，进而达到一方面可以提高虚拟图像以及真实世界的可见度，另一方面可以避免用于形成虚拟图像的光线发射至外界，造成信息泄露的不良现象出现。
示例五
参见图3，若第一偏振光学元件11和第二偏振光学元件13均为偏振分光膜，且第一偏振光学元件11的透光轴与第二偏振光学元件13的透光轴互相平行，相位延迟器件12在断电状态对照射在其上的光线的偏振方向旋转90°，通电时不对照射在其上光线的偏振方向进行旋转。
相位延迟器件12断电的情况下，外界光透过第二偏振光学元件13后变为振动方向平行于第二偏振光学元件13透光轴的线偏振光。该线偏振光透过相位延迟器件12后，偏振方向旋转90°，到达第一偏振光学元件11。由于到达第一偏振光学元件11的线偏振光的振动方向与第一偏振光学元件11透光轴垂直，其会被第一偏振光学元件11反射，并第二次达到相位延迟器件12。第二次到达相位延迟器件12的光线的偏振方向再次旋转90°，恢复到与第二偏振光学元件13透光轴平行的方向，进而透过第二 偏振光学元件13。如果增强现实显示模组显示虚拟图像，增强现实显示模组外漏的光，透过第一偏振光学元件11后变为振动方向平行于第一偏振光学元件11透光轴的线偏振光，该线偏振光透过相位延迟器件12后，偏振方向旋转90°，到达第二偏振光学元件13。其会被第二偏振光学元件13反射，并第二次达到相位延迟器件12。第二次到达相位延迟器件12的光线的偏振方向再次旋转90°，恢复到与第一偏振光学元件11透光轴平行的方向，进而透过第一偏振光学元件11，通过镜片，到达人眼并被人眼接收。即在相位延迟器件12断电的情况下，外界光无法透过遮光结构10，增强现实显示模组外漏的光会被反射回来，被人眼接收，其可以增强虚拟图像的亮度，提高增强现实显示模组的光能利用率。
相位延迟器件12通电的情况下，外界光透过第二偏振光学元件13后变为振动方向平行于第二偏振光学元件13透光轴的线偏振光。该线偏振光透过相位延迟器件12后，偏振方向不旋转，到达第一偏振光学元件11。由于到达第一偏振光学元件11的线偏振光的振动方向与第一偏振光学元件11透光轴平行，其可穿过第一偏振光学元件11。如果增强现实显示模组显示虚拟图像，增强现实显示模组外漏的光，透过第一偏振光学元件11后变为振动方向平行于第一偏振光学元件11透光轴的线偏振光，该线偏振光透过相位延迟器件12后，偏振方向不旋转，到达第二偏振光学元件13。由于到达第二偏振光学元件13的线偏振光的振动方向与第二偏振光学元件13透光轴平行，其可穿过第二偏振光学元件13。即在相位延迟器件12通电的情况下，外界光可以透过遮光结构10，增强现实显示模组外漏的光也可以透过遮光结构10。
此种情况下，AR头戴式显示设备工作过程的时序图与图5一致。参见图5，在一帧的显示时间内，在非透光时段，控制显示模组成亮态，以显示虚拟图像，控制遮光结构中相位延迟器件断电，此时增强现实显示模组外漏光不仅无法透过遮光结构，还会被反射至人眼并加以利用，外界也无法看到增强现实显示模组的外漏光。在透光时段，控制显示模组成暗态，无法显示虚拟图像，控制遮光结构中相位延迟器件通电，此时遮光结构透光，佩戴者可以在该时间段感知到外界的光，可通过遮光结构观察到真实世界。但此时因增强现实显示模组为暗态，不会向外漏光。通过此种方式实现了对外漏光的遮挡和对外界光的透过，进而达到一方面可以提高虚拟图像以及真实世界的可见度，另一方面可以避免用于形成虚拟图像的光线发射至外界，造成信息泄露的不良现象出现。
示例六
参见图3，若第一偏振光学元件11和第二偏振光学元件13均为偏振分光膜，且第一偏振光学元件11的透光轴与第二偏振光学元件13的透光轴互相垂直，相位延迟器件12在断电状态对照射在其上的光线的偏振方向旋转90°，通电时不对照射在其上光线的偏振方向进行旋转。
相位延迟器件12断电的情况下，外界光透过第二偏振光学元件13后变为振动方向平行于第二偏振光学元件13透光轴的线偏振光。该线偏振光透过相位延迟器件12后，偏振方向旋转90°，到达第一偏振光学元件11。由于到达第一偏振光学元件11的线偏振光的振动方向与第一偏振光学元件11透光轴平行，其可以穿过第一偏振光学元件11。如果增强现实显示模组显示虚拟图像，增强现实显示模组外漏的光，透过第一偏振光学元件11后变为振动方向平行于第一偏振光学元件11透光轴的线偏振光，该线偏振光透过相位延迟器件12后，偏振方向旋转90°，到达第二偏振光学元件13。由于到达第二偏振光学元件13的线偏振光的振动方向与第二偏振光学元件13透光轴平行，其可以穿过第二偏振光学元件13。即在相位延迟器件12断电的情况下，外界光可以透过遮光结构10，增强现实显示模组外漏的光也可以透过遮光结构10。
相位延迟器件12通电的情况下，外界光透过第二偏振光学元件13后变为振动方向平行于第二偏振光学元件13透光轴的线偏振光。该线偏振光透过相位延迟器件12后，偏振方向不旋转，到达第一偏振光学元件11。由于到达第一偏振光学元件11的线偏振光的振动方向与第一偏振光学元件11透光轴垂直，其会被第一偏振光学元件11反射，并第二次达到相位延迟器件12。第二次到达相位延迟器件12的光线的偏振方向再次旋转90°，恢复到与第二偏振光学元件13透光轴平行的方向，进而透过第二偏振光学元件13。如果增强现实显示模组显示虚拟图像，增强现实显示模组外漏的光，透过第一偏振光学元件11后变为振动方向平行于第一偏振光学元件11透光轴的线偏振光，该线偏振光透过相位延迟器件12后，偏振方向不旋转，到达第二偏振光学元件13。其会被第二偏振光学元件13反射，并第二次达到相位延迟器件12。第二次到达相位延迟器件12的光线的偏振方向再次旋转90°，恢复到与第一偏振光学元件11透光轴平行的方向，进而透过第一偏振光学元件11，通过镜片，到达人眼并被人眼接收。即在相位延迟器件12通电的情况下，外界光无法透过遮光结构10，增强现实显示模组外漏的光会被反射回来，被人眼接收，其可以增强虚拟图像的亮度，提高增强现实显示模组的光能利用率。
此种情况下，AR头戴式显示设备工作过程的时序图与图6一致。参见图6，在一 帧的显示时间内，在非透光时段，控制显示模组成亮态，以显示虚拟图像，控制遮光结构中相位延迟器件通电，此时增强现实显示模组外漏光不仅无法透过遮光结构，还会被反射至人眼并加以利用，外界也无法看到增强现实显示模组的外漏光。在透光时段，控制显示模组成暗态，无法显示虚拟图像，控制遮光结构中相位延迟器件断电，此时遮光结构透光，佩戴者可以在该时间段感知到外界的光，可通过遮光结构观察到真实世界。但此时因增强现实显示模组为暗态，不会向外漏光。通过此种方式实现了对外漏光的遮挡和对外界光的透过，进而达到一方面可以提高虚拟图像以及真实世界的可见度，另一方面可以避免用于形成虚拟图像的光线发射至外界，造成信息泄露的不良现象出现。
示例七
参见图3，若第一偏振光学元件11和第二偏振光学元件13均为偏振分光膜，且第一偏振光学元件11的透光轴与第二偏振光学元件13的透光轴互相平行，相位延迟器件12在通电状态对照射在其上的光线的偏振方向旋转90°，断电时不对照射在其上光线的偏振方向进行旋转。
相位延迟器件12通电的情况下，外界光透过第二偏振光学元件13后变为振动方向平行于第二偏振光学元件13透光轴的线偏振光。该线偏振光透过相位延迟器件12后，偏振方向旋转90°，到达第一偏振光学元件11。由于到达第一偏振光学元件11的线偏振光的振动方向与第一偏振光学元件11透光轴垂直，其会被第一偏振光学元件11反射，并第二次达到相位延迟器件12。第二次到达相位延迟器件12的光线的偏振方向再次旋转90°，恢复到与第二偏振光学元件13透光轴平行的方向，进而透过第二偏振光学元件13。如果增强现实显示模组显示虚拟图像，增强现实显示模组外漏的光，透过第一偏振光学元件11后变为振动方向平行于第一偏振光学元件11透光轴的线偏振光，该线偏振光透过相位延迟器件12后，偏振方向旋转90°，到达第二偏振光学元件13。由于到达第二偏振光学元件13的线偏振光的振动方向与第二偏振光学元件13透光轴垂直，其会被第二偏振光学元件13反射，并第二次达到相位延迟器件12。第二次到达相位延迟器件12的光线的偏振方向再次旋转90°，恢复到与第一偏振光学元件11透光轴平行的方向，进而透过第一偏振光学元件11，通过镜片，到达人眼并被人眼接收。即在相位延迟器件12通电的情况下，外界光无法透过遮光结构10，增强现实显示模组外漏的光会被反射回来，被人眼接收，其可以增强虚拟图像的亮度，提高增强现实显示模组的光能利用率。
相位延迟器件12断电的情况下，外界光透过第二偏振光学元件13后变为振动方向平行于第二偏振光学元件13透光轴的线偏振光。该线偏振光透过相位延迟器件12后，偏振方向不旋转，到达第一偏振光学元件11。由于到达第一偏振光学元件11的线偏振光的振动方向与第一偏振光学元件11透光轴平行，其可穿过第一偏振光学元件11。如果增强现实显示模组显示虚拟图像，增强现实显示模组外漏的光，透过第一偏振光学元件11后变为振动方向平行于第一偏振光学元件11透光轴的线偏振光，该线偏振光透过相位延迟器件12后，偏振方向不旋转，到达第二偏振光学元件13。由于到达第二偏振光学元件13的线偏振光的振动方向与第二偏振光学元件13透光轴平行，其可穿过第二偏振光学元件13。即在相位延迟器件12断电的情况下，外界光可以透过遮光结构10，增强现实显示模组外漏的光也可以透过遮光结构10。
此种情况下，AR头戴式显示设备工作过程的时序图与图6一致。参见图6，在一帧的显示时间内，在非透光时段，控制显示模组成亮态，以显示虚拟图像，控制遮光结构中相位延迟器件通电，此时增强现实显示模组外漏光不仅无法透过遮光结构，还会被反射至人眼并加以利用，外界也无法看到增强现实显示模组的外漏光。在透光时段，控制显示模组成暗态，无法显示虚拟图像，控制遮光结构中相位延迟器件断电，此时遮光结构透光，佩戴者可以在该时间段感知到外界的光，可通过遮光结构观察到真实世界。但此时因增强现实显示模组为暗态，不会向外漏光。通过此种方式实现了对外漏光的遮挡和对外界光的透过，进而达到一方面可以提高虚拟图像以及真实世界的可见度，另一方面可以避免用于形成虚拟图像的光线发射至外界，造成信息泄露的不良现象出现。
示例八
参见图3，若第一偏振光学元件11和第二偏振光学元件13均为偏振分光膜，且第一偏振光学元件11的透光轴与第二偏振光学元件13的透光轴互相垂直，相位延迟器件12在通电状态对照射在其上的光线的偏振方向旋转90°，断电时不对照射在其上光线的偏振方向进行旋转。
相位延迟器件12通电的情况下，外界光透过第二偏振光学元件13后变为振动方向平行于第二偏振光学元件13透光轴的线偏振光。该线偏振光透过相位延迟器件12后，偏振方向旋转90°，到达第一偏振光学元件11。由于到达第一偏振光学元件11的线偏振光的振动方向与第一偏振光学元件11透光轴平行，其可以穿过第一偏振光学元件11。如果增强现实显示模组显示虚拟图像，增强现实显示模组外漏的光，透过第 一偏振光学元件11后变为振动方向平行于第一偏振光学元件11透光轴的线偏振光，该线偏振光透过相位延迟器件12后，偏振方向旋转90°，到达第二偏振光学元件13。由于到达第二偏振光学元件13的线偏振光的振动方向与第二偏振光学元件13透光轴平行，其可以穿过第二偏振光学元件13。即在相位延迟器件12通电的情况下，外界光可以透过遮光结构10，增强现实显示模组外漏的光也可以透过遮光结构10。
相位延迟器件12断电的情况下，外界光透过第二偏振光学元件13后变为振动方向平行于第二偏振光学元件13透光轴的线偏振光。该线偏振光透过相位延迟器件12后，偏振方向不旋转，到达第一偏振光学元件11。由于到达第一偏振光学元件11的线偏振光的振动方向与第一偏振光学元件11透光轴垂直，其会被第一偏振光学元件11反射，并第二次达到相位延迟器件12。第二次到达相位延迟器件12的光线的偏振方向再次旋转90°，恢复到与第二偏振光学元件13透光轴平行的方向，进而透过第二偏振光学元件13。如果增强现实显示模组显示虚拟图像，增强现实显示模组外漏的光，透过第一偏振光学元件11后变为振动方向平行于第一偏振光学元件11透光轴的线偏振光，该线偏振光透过相位延迟器件12后，偏振方向不旋转，到达第二偏振光学元件13。由于到达第二偏振光学元件13的线偏振光的振动方向与第二偏振光学元件13透光轴垂直，其会被第二偏振光学元件13反射，并第二次达到相位延迟器件12。第二次到达相位延迟器件12的光线的偏振方向再次旋转90°，恢复到与第一偏振光学元件11透光轴平行的方向，进而透过第一偏振光学元件11，通过镜片，到达人眼并被人眼接收。即在相位延迟器件12断电的情况下，外界光无法透过遮光结构10，增强现实显示模组外漏的光也无法透过遮光结构10，而是会被反射回来，被人眼接收，其可以增强虚拟图像的亮度，提高增强现实显示模组的光能利用率。
此种情况下，AR头戴式显示设备工作过程的时序图与图5一致。参见图5，在一帧的显示时间内，在非透光时段，控制显示模组成亮态，以显示虚拟图像，控制遮光结构中相位延迟器件断电，此时增强现实显示模组外漏光不仅无法透过遮光结构，还会被反射至人眼并加以利用，外界也无法看到增强现实显示模组的外漏光。在透光时段，控制显示模组成暗态，无法显示虚拟图像，控制遮光结构中相位延迟器件通电，此时遮光结构透光，佩戴者可以在该时间段感知到外界的光，可通过遮光结构观察到真实世界。但此时因增强现实显示模组为暗态，不会向外漏光。通过此种方式实现了对外漏光的遮挡和对外界光的透过，进而达到一方面可以提高虚拟图像以及真实世界的可见度，另一方面可以避免用于形成虚拟图像的光线发射至外界，造成信息泄露的 不良现象出现。
需要说明的是，上述镜片中的光波导结构可以为波导镜片。在实际中，还可以将波导镜片替换为Birdbath镜片或棱镜式镜片。但是当第一偏振光学元件和第二偏振光学元件中至少一个为偏振分光膜时，如果采用其他镜片，如Birdbath镜片或棱镜式镜片；显示模组的外漏光在偏振分光膜处被反射后会成像，所成的像会与直接入射到人眼的像产生像差，进而导致虚拟图像不清晰。而选用波导镜片不会出现此问题。
在一些实施例中，遮光结构包括阵列排布的多个遮光单元，各遮光单元的工作状态独立可调；在透光时段，遮光结构中位于目标区域内的遮光单元处于非透光状态，位于目标区域外的遮光单元处于透光状态；其中，目标区域为显示模组在镜片上的显示区域。
“各遮光单元的工作状态独立可调”是指可以单独对每一个遮光单元的工作状态进行调整，如控制其由透光状态调整为遮光状态，或者由遮光状态调整为透光状态。
在一些实施例中，目标区域为目标对象在遮光结构上的投射区域，目标对象为在同一帧中非透光时段显示模组显示的虚拟图像包括的对象。
显示模组显示的虚拟图像包括至少一个对象，该对象包括但不限于人、物品、用于人机交互的信息展示区域以及控件等。在实际中，如果虚拟图像中包括多个对象，将所有对象均确定为目标对象，也可以将部分对象确定为目标对象。
在一些实施例中，目标区域是指以人眼或显示模组的出瞳中心为顶点，以虚拟图像中的对象为底面，形成的锥体与遮光结构相交的区域。或，目标区域是指以人眼或显示模组的出瞳中心为顶点，以虚拟图像中的对象为底面，形成的锥体与相位延迟器件相交的区域。
示例性地，若在某一帧的非透光时段，显示模组显示的虚拟图像包括一个箱子，基于该箱子在虚拟图像中的位置，以及人眼或显示模组的出瞳中心为顶点，确定与箱子对应的目标区域。在透光时段，显示模组不显示包括箱子的该虚拟图像；目标区域内的遮光单元处于遮光状态，位于目标区域外的遮光单元处于透光状态；在非透光时段，显示模组显示包括箱子的该虚拟图像；遮光结构处于遮光状态。换言之，与箱子对应的目标区域内的遮光单元在非透光时段和透光时段均处于遮光状态，与箱子对应的目标区域外的遮光单元在非透光时段处于遮光状态，在透光时段处于透光状态。这样可以避免在透光时段，本应被箱子遮挡住的真实世界在人眼中形成视觉形象，保留在人的大脑中，进而导致目标对象显示的效果不逼真的问题出现。
在一些实施例中，目标对象包括黑色物体或不透明物体。这样设置的目的是，实现黑色物体或不透明物体的逼真显示。
本领域技术人员可以理解，对于确定的AR头带式显示设备，显示模组中每个像素在镜片上的显示位置是固定的。在显示模组显示某一帧虚拟图像之前，基于用于驱动显示模组显示该帧虚拟图像的驱动信号，就可以直接确定遮光结构中哪些区域将为与该帧虚拟图像对应的目标区域。而不是在显示模组显示该帧虚拟图像之后，才能得到遮光结构中哪些区域为与该帧虚拟图像对应的目标区域。
基于此，在一些实施例中，在透光时段，处理器基于驱动信号，得到对遮光结构的控制信号；向显示模组发送驱动信号，并向遮光结构发送控制信号，以使显示模组显示虚拟图像，同时遮光结构中位于目标区域内的遮光单元处于非透光状态，位于目标区域外的遮光单元处于透光状态。
在上述各技术方案的基础上，在一些实施例中，该镜片还包括退偏光学元件；退偏光学元件位于遮光结构的环境侧。
图7为本公开一些实施例提供的另一种AR头带式显示设备的结构示意图。参见图7，退偏光学元件30位于遮光结构10的环境侧。
在一些实施例中，该退偏光学元件包括消偏振片或波片。进一步地，若该退偏光学元件包括波片，波片的光轴与第二偏振光学元件的透光轴成预设夹角。这样设置的原因是部分手机屏幕、电视以及显示器等显示装置所发出的光为线偏振光。当用户佩戴该AR头戴式显示设备，如果不设置退偏光学元件，且显示装置所发出的光的振动方向与第二偏振光学元件的透光轴垂直，显示装置所发出的光无法透过AR头戴式显示设备中的遮光结构，也就无法进入到人眼。换言之，佩戴AR头戴式显示设备后，用户无法观看手机屏幕，电视以及显示器等显示装置。通过在AR头戴式显示设备中增设退偏光学元件，可以改变手机屏幕、电视及显示器等显示装置所发出的线偏振光的偏振方向，或者将手机屏幕、电视及显示器等显示装置所发出的线偏振光转化为非线偏振光(如圆偏振光、椭圆偏振光)或自然光，而后可以透过遮光结构，进入人眼，确保佩戴AR头戴式显示设备后，用户可以观看手机屏幕，电视以及显示器等显示装置。
图8为本公开一些实施例提供的一种AR头戴式显示设备控制方法的流程图。该控制方法适用于本公开实施例提供的AR头戴式显示设备，AR头戴式显示设备一帧的显示时间包括至少一个透光时段以及至少一个非透光时段，透光时段以及非透光时 段交替进行；参见图8，该方法包括：步骤S410～S420。
在步骤S410中，在透光时段，控制显示模组不显示虚拟图像以及遮光结构处于透光状态。
在步骤S420中，在非透光时段，控制显示模组显示虚拟图像以及遮光结构处于遮光状态。
视觉暂留是指光对视网膜所产生的视觉在光停止作用后，仍保留一段时间的现象。一帧的显示时间包括一个透光时段以及一个非透光时段。在透光时段，由于遮光结构处于透光状态，人眼可以通过遮光结构观察到真实世界。由于视觉暂留的作用，当时间达到非透光时段，真实的世界的视觉形象还保留在人的大脑中，同时由于非透光时段，显示模组显示虚拟图像，人眼还能够看到显示模组所显示的虚拟图像，由虚拟图像形成的视觉形象也会保留在人的大脑中，使得在人的观感上实现虚拟图像和现实世界的叠加。
并且，由于在透光时段，显示模组不显示虚拟图像，人眼中形成的真实世界的视觉形象不会被显示模组显示的虚拟图像所干扰，使得真实世界的视觉形象在人脑中更加清晰。此外，其他用户(非该AR头戴式显示设备佩戴者)也不会透过遮光结构观察到显示模组显示的虚拟图像。在非透光时段，遮光结构处于遮光状态，使得人眼中形成的虚拟图像的视觉形象不会被外界环境光所干扰，使得虚拟图像具有较高的可见度，可以使得虚拟图像的视觉形象在人脑中更加清晰。同时，形成虚拟图像的光线也不会通过遮光结构到达其他用户(非该AR头戴式显示设备佩戴者)眼中，造成信息泄露的不良现象出现。
因此，采用上述技术方案可以一方面可以提高虚拟图像以及真实世界的可见度，另一方面可以避免用于形成虚拟图像的光线发射至外界，造成信息泄露的不良现象出现。
进一步地，遮光结构包括阵列排布的多个遮光单元，各遮光单元的工作状态独立可调；在透光时段，控制显示模组不显示虚拟图像以及遮光结构处于透光状态包括：确定目标区域，目标区域为显示模组在镜片上的显示区域；在透光时段，控制遮光结构中位于目标区域内的遮光单元处于非透光状态，位于目标区域外的遮光单元处于透光状态。
需要说明的是，对于前述的各方法实施例，为了简单描述，故将其都表述为一系列的动作组合，但是本领域技术人员应该知悉，本发明并不受所描述的动作顺序的限 制，因为依据本发明，某些步骤可以采用其他顺序或者同时进行。其次，本领域技术人员也应该知悉，说明书中所描述的实施例均属于优选实施例，所涉及的动作和模块并不一定是本发明所必须的。
图9为本公开一些实施例中的一种AR头戴式显示设备控制装置的结构示意图。本公开实施例所提供的AR头戴式显示设备控制装置适用于本公开实施例提供的AR头戴式显示设备。AR头戴式显示设备一帧的显示时间包括至少一个透光时段以及至少一个非透光时段，透光时段以及非透光时段交替进行。参见图9，该AR头戴式显示设备控制装置具体包括：
第一控制模块510，用于在所述透光时段，控制所述显示模组不显示虚拟图像以及所述遮光结构处于透光状态；
第二控制模块520，用于在所述非透光时段，控制所述显示模组显示虚拟图像以及所述遮光结构处于遮光状态。
进一步地，所述遮光结构包括阵列排布的多个遮光单元，各所述遮光单元的遮光效果独立可调；第一控制模块用于：确定目标区域，所述目标区域为所述显示模组在所述镜片上的显示区域；在所述透光时段，控制所述遮光结构中位于所述目标区域内的所述遮光单元处于非透光状态，位于所述目标区域外的所述遮光单元处于透光状态。
本公开实施例提供的AR头戴式显示设备控制装置，可执行本公开方法实施例所提供AR头戴式显示设备控制方法的步骤，具备相同或相应的有益效果，此处不再赘述。
图10为本公开实施例中的一种电子设备的结构示意图。下面具体参考图10，其示出了适于用来实现本公开实施例中的电子设备1000的结构示意图。本公开实施例中的电子设备1000可以包括但不限于诸如移动电话、笔记本电脑、数字广播接收器、PDA(个人数字助理)、PAD(平板电脑)、PMP(便携式多媒体播放器)、车载终端(例如车载导航终端)、可穿戴电子设备等等的移动终端以及诸如数字TV、台式计算机、智能家居设备等等的固定终端。图10示出的电子设备仅仅是一个示例，不应对本公开实施例的功能和使用范围带来任何限制。
如图10所示，电子设备1000可以包括处理装置(例如中央处理器、图形处理器等)1001，其可以根据存储在只读存储器(ROM)1002中的程序或者从存储装置1008加载到随机访问存储器(RAM)1003中的程序而执行各种适当的动作和处理以实现如本公开所述的实施例的AR头戴式显示设备控制方法。在RAM 1003中，还存储有电 子设备1000操作所需的各种程序和信息。处理装置1001、ROM 1002以及RAM 1003通过总线1004彼此相连。输入/输出(I/O)接口1005也连接至总线1004。
通常，以下装置可以连接至I/O接口1005：包括例如触摸屏、触摸板、键盘、鼠标、摄像头、麦克风、加速度计、陀螺仪等的输入装置1006；包括例如液晶显示器(LCD)、扬声器、振动器等的输出装置1007；包括例如磁带、硬盘等的存储装置1008；以及通信装置1009。通信装置1009可以允许电子设备1000与其他设备进行无线或有线通信以交换信息。虽然图10示出了具有各种装置的电子设备1000，但是应理解的是，并不要求实施或具备所有示出的装置。可以替代地实施或具备更多或更少的装置。
特别地，根据本公开的实施例，上文参考流程图描述的过程可以被实现为计算机软件程序。例如，本公开的实施例包括一种计算机程序产品，其包括承载在非暂态计算机可读介质上的计算机程序，该计算机程序包含用于执行流程图所示的方法的程序代码，从而实现如上所述的AR头戴式显示设备控制方法。在这样的实施例中，该计算机程序可以通过通信装置1009从网络上被下载和安装，或者从存储装置1008被安装，或者从ROM 1002被安装。在该计算机程序被处理装置1001执行时，执行本公开实施例的方法中限定的上述功能。
需要说明的是，本公开上述的计算机可读介质可以是计算机可读信号介质或者计算机可读存储介质或者是上述两者的任意组合。计算机可读存储介质例如可以是——但不限于——电、磁、光、电磁、红外线、或半导体的系统、装置或器件，或者任意以上的组合。计算机可读存储介质的更具体的例子可以包括但不限于：具有一个或多个导线的电连接、便携式计算机磁盘、硬盘、随机访问存储器(RAM)、只读存储器(ROM)、可擦式可编程只读存储器(EPROM或闪存)、光纤、便携式紧凑磁盘只读存储器(CD-ROM)、光存储器件、磁存储器件、或者上述的任意合适的组合。在本公开中，计算机可读存储介质可以是任何包含或存储程序的有形介质，该程序可以被指令执行系统、装置或者器件使用或者与其结合使用。而在本公开中，计算机可读信号介质可以包括在基带中或者作为载波一部分传播的信息信号，其中承载了计算机可读的程序代码。这种传播的信息信号可以采用多种形式，包括但不限于电磁信号、光信号或上述的任意合适的组合。计算机可读信号介质还可以是计算机可读存储介质以外的任何计算机可读介质，该计算机可读信号介质可以发送、传播或者传输用于由指令执行系统、装置或者器件使用或者与其结合使用的程序。计算机可读介质上包含的程序代码可以用任何适当的介质传输，包括但不限于：电线、光缆、RF(射频)等 等，或者上述的任意合适的组合。
在一些实施方式中，客户端、服务器可以利用诸如HTTP(HyperText Transfer Protocol，超文本传输协议)之类的任何已知或未来研发的网络协议进行通信，并且可以与任意形式或介质的数字信息通信(例如，通信网络)互连。通信网络的示例包括局域网(“LAN”)，广域网(“WAN”)，网际网(例如，互联网)以及端对端网络(例如，ad hoc端对端网络)，以及任何已知或未来研发的网络。
上述计算机可读介质可以是上述电子设备中所包含的；也可以是单独存在，而未装配入该电子设备中。
上述计算机可读介质承载有一个或者多个程序，当上述一个或者多个程序被该电子设备执行时，使得该电子设备：
在所述透光时段，控制所述显示模组不显示虚拟图像以及所述遮光结构处于透光状态；
在所述非透光时段，控制所述显示模组显示虚拟图像以及所述遮光结构处于遮光状态。
在一些实施例中，当上述一个或者多个程序被该电子设备执行时，该电子设备还可以执行上述实施例所述的其他步骤。
可以以一种或多种程序设计语言或其组合来编写用于执行本公开的操作的计算机程序代码，上述程序设计语言包括但不限于面向对象的程序设计语言—诸如Java、Smalltalk、C++，还包括常规的过程式程序设计语言—诸如“C”语言或类似的程序设计语言。程序代码可以完全地在用户计算机上执行、部分地在用户计算机上执行、作为一个独立的软件包执行、部分在用户计算机上部分在远程计算机上执行、或者完全在远程计算机或服务器上执行。在涉及远程计算机的情形中，远程计算机可以通过任意种类的网络——包括局域网(LAN)或广域网(WAN)—连接到用户计算机，或者，可以连接到外部计算机(例如利用因特网服务提供商来通过因特网连接)。
附图中的流程图和框图，图示了按照本公开各种实施例的系统、方法和计算机程序产品的可能实现的体系架构、功能和操作。在这点上，流程图或框图中的每个方框可以代表一个模块、程序段、或代码的一部分，该模块、程序段、或代码的一部分包含一个或多个用于实现规定的逻辑功能的可执行指令。也应当注意，在有些作为替换的实现中，方框中所标注的功能也可以以不同于附图中所标注的顺序发生。例如，两个接连地表示的方框实际上可以基本并行地执行，它们有时也可以按相反的顺序执行， 这依所涉及的功能而定。也要注意的是，框图和/或流程图中的每个方框、以及框图和/或流程图中的方框的组合，可以用执行规定的功能或操作的专用的基于硬件的系统来实现，或者可以用专用硬件与计算机指令的组合来实现。
描述于本公开实施例中所涉及到的单元可以通过软件的方式实现，也可以通过硬件的方式来实现。其中，单元的名称在某种情况下并不构成对该单元本身的限定。
本文中以上描述的功能可以至少部分地由一个或多个硬件逻辑部件来执行。例如，非限制性地，可以使用的示范类型的硬件逻辑部件包括：现场可编程门阵列(FPGA)、专用集成电路(ASIC)、专用标准产品(ASSP)、片上系统(SOC)、复杂可编程逻辑设备(CPLD)等等。
在本公开的上下文中，机器可读介质可以是有形的介质，其可以包含或存储以供指令执行系统、装置或设备使用或与指令执行系统、装置或设备结合地使用的程序。机器可读介质可以是机器可读信号介质或机器可读储存介质。机器可读介质可以包括但不限于电子的、磁性的、光学的、电磁的、红外的、或半导体系统、装置或设备，或者上述内容的任何合适组合。机器可读存储介质的更具体示例会包括基于一个或多个线的电气连接、便携式计算机盘、硬盘、随机存取存储器(RAM)、只读存储器(ROM)、可擦除可编程只读存储器(EPROM或快闪存储器)、光纤、便捷式紧凑盘只读存储器(CD-ROM)、光学储存设备、磁储存设备、或上述内容的任何合适组合。
根据本公开的一个或多个实施例，本公开提供了一种电子设备，包括：
一个或多个处理器；
存储器，用于存储一个或多个程序；
当所述一个或多个程序被所述一个或多个处理器执行，使得所述一个或多个处理器实现如本公开提供的任一所述的AR头戴式显示设备控制方法。
根据本公开的一个或多个实施例，本公开提供了一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现如本公开提供的任一所述的AR头戴式显示设备控制方法。
本公开实施例还提供了一种计算机程序产品，该计算机程序产品包括计算机程序或指令，该计算机程序或指令被处理器执行时实现如上所述的AR头戴式显示设备控制方法。
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。而且，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。
以上所述仅是本公开的具体实施方式，使本领域技术人员能够理解或实现本公开。对这些实施例的多种修改对本领域的技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本公开的精神或范围的情况下，在其它实施例中实现。因此，本公开将不会被限制于本文所述的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (15)

  1. 一种AR头戴式显示设备，包括：显示模组、镜片以及处理器，其中：
    所述镜片包括层叠设置的光波导结构和遮光结构；
    所述遮光结构位于所述光波导结构的远离用户眼睛的环境侧；
    所述光波导结构用于将所述显示模组发出的光耦合到用户眼睛；所述遮光结构的工作状态包括遮光状态和透光状态；
    所述处理器与所述遮光结构电连接，用于控制所述遮光结构在所述遮光状态和所述透光状态之间进行切换。
  2. 根据权利要求1所述的AR头戴式显示设备，其中，所述AR头戴式显示设备一帧的显示时间包括至少一个透光时段以及至少一个非透光时段，所述透光时段以及所述非透光时段交替进行；
    在所述透光时段，所述显示模组不显示虚拟图像，所述遮光结构处于透光状态；
    在所述非透光时段，所述显示模组显示虚拟图像，所述遮光结构处于遮光状态。
  3. 根据权利要求1或2所述的AR头戴式显示设备，其中，所述遮光结构包括沿由眼睛侧指向所述环境侧方向层叠设置的第一偏振光学元件、相位延迟器件以及第二偏振光学元件。
  4. 根据权利要求3所述的AR头戴式显示设备，其中，
    所述第一偏振光学元件和所述第二偏振光学元件均为偏振片；或者，
    所述第一偏振光学元件和所述第二偏振光学元件均为偏振分光膜；或者，
    所述第一偏振光学元件为偏振分光膜，所述第二偏振光学元件为偏振片；或者，
    所述第一偏振光学元件为偏振片，所述第二偏振光学元件为偏振分光膜。
  5. 根据权利要求3或4所述的AR头戴式显示设备，其中，所述第一偏振光学元件和所述第二偏振光学元件的偏振方向平行或垂直。
  6. 根据权利要求2-5任一项所述的AR头戴式显示设备，其中，所述遮光结构包括阵列排布的多个遮光单元，各所述遮光单元的工作状态独立可调，
    在所述透光时段，所述遮光结构中位于目标区域内的所述遮光单元处于非透光状态，位于所述目标区域外的所述遮光单元处于透光状态；其中，所述目标区域为所述显示模组在所述镜片上的显示区域。
  7. 根据权利要求1-6任一项所述的AR头戴式显示设备，其中，所述镜片还包括 退偏光学元件，
    所述退偏光学元件位于所述遮光结构的环境侧。
  8. 根据权利要求4所述的AR头戴式显示设备，其中，
    当第一偏振光学元件和第二偏振光学元件中至少一个为偏振分光膜时，所述光波导结构为波导镜片。
  9. 根据权利要求7所述的AR头戴式显示设备，其中，
    所述退偏光学元件包括消偏振片或波片，在所述退偏光学元件包括波片的情况下，所述波片的光轴与第二偏振光学元件的透光轴成预设夹角。
  10. 一种AR头戴式显示设备控制方法，其中，所述控制方法适用于权利要求1-9任一项所述的AR头戴式显示设备，所述AR头戴式显示设备一帧的显示时间包括至少一个透光时段以及至少一个非透光时段，所述透光时段以及所述非透光时段交替进行，该方法包括：
    在所述透光时段，控制所述显示模组不显示虚拟图像以及所述遮光结构处于透光状态；
    在所述非透光时段，控制所述显示模组显示虚拟图像以及所述遮光结构处于遮光状态。
  11. 根据权利要求10所述的方法，其中，所述遮光结构包括阵列排布的多个遮光单元，各所述遮光单元的工作状态独立可调，所述在所述透光时段，控制所述显示模组不显示虚拟图像以及所述遮光结构处于透光状态包括：
    确定目标区域，其中，所述目标区域为所述显示模组在所述镜片上的显示区域；
    在所述透光时段，控制所述遮光结构中位于所述目标区域内的所述遮光单元处于非透光状态，位于所述目标区域外的所述遮光单元处于透光状态。
  12. 一种AR头戴式显示设备控制装置，其中，所述控制装置适用于权利要求1-9任一项所述的AR头戴式显示设备，所述AR头戴式显示设备一帧的显示时间包括至少一个透光时段以及至少一个非透光时段，所述透光时段以及所述非透光时段交替进行，该装置包括：
    第一控制模块，用于在所述透光时段，控制所述显示模组不显示虚拟图像以及所述遮光结构处于透光状态；
    第二控制模块，用于在所述非透光时段，控制所述显示模组显示虚拟图像以及所述遮光结构处于遮光状态。
  13. 一种电子设备，其中，所述电子设备包括：
    一个或多个处理器；
    存储装置，用于存储一个或多个程序；
    当所述一个或多个程序被所述一个或多个处理器执行，使得所述一个或多个处理器实现如权利要求10-11中任一项所述的方法。
  14. 一种计算机可读存储介质，其上存储有计算机程序，其中，该程序被处理器执行时实现如权利要求10-11中任一项所述的方法。
  15. 一种计算机程序，包括：指令，所述指令被处理器执行时实现如权利要求10-11中任一项所述的方法。
PCT/CN2023/113724 2022-08-18 2023-08-18 Ar头戴式显示设备、控制方法及控制装置 Ceased WO2024037622A1 (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102540463A (zh) * 2010-09-21 2012-07-04 微软公司 用于透视头戴式显示器的不透明度滤光器
CN109445107A (zh) * 2018-12-25 2019-03-08 北京谷东网科技有限公司 可单目立体显示的增强现实显示装置及其显示方法
CN113302547A (zh) * 2019-08-13 2021-08-24 苹果公司 具有时间交错的显示系统
CN113448089A (zh) * 2020-03-28 2021-09-28 华为技术有限公司 增强现实设备及其显示方法
CN113892050A (zh) * 2019-07-04 2022-01-04 三星电子株式会社 用于显示增强现实的电子设备和方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102540463A (zh) * 2010-09-21 2012-07-04 微软公司 用于透视头戴式显示器的不透明度滤光器
CN109445107A (zh) * 2018-12-25 2019-03-08 北京谷东网科技有限公司 可单目立体显示的增强现实显示装置及其显示方法
CN113892050A (zh) * 2019-07-04 2022-01-04 三星电子株式会社 用于显示增强现实的电子设备和方法
CN113302547A (zh) * 2019-08-13 2021-08-24 苹果公司 具有时间交错的显示系统
CN113448089A (zh) * 2020-03-28 2021-09-28 华为技术有限公司 增强现实设备及其显示方法

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