CN108333777B - Near-eye display optical module and near-eye display system - Google Patents

Near-eye display optical module and near-eye display system Download PDF

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Publication number
CN108333777B
CN108333777B CN201810357204.9A CN201810357204A CN108333777B CN 108333777 B CN108333777 B CN 108333777B CN 201810357204 A CN201810357204 A CN 201810357204A CN 108333777 B CN108333777 B CN 108333777B
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sub
image
polarization direction
reflection
image light
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CN108333777A (en
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请求不公布姓名
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Shenzhen Skyworth New World Technology Co ltd
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Shenzhen Skyworth New World Technology Co ltd
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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
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/011—Head-up displays characterised by optical features comprising device for correcting geometrical aberrations, distortion
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view

Abstract

The invention provides a near-eye display optical module and a near-eye display system. The near-eye display system comprises a near-eye display optical module and an image display device. The near-eye display optical module comprises an electric control liquid crystal polarizing element, an electric control optical device, a first reflection amplifying element, a second reflection amplifying element, a phase delay plate and a reflecting element. The image display device sequentially outputs a first beam of sub-image light and a second beam of sub-image light of an image to be displayed, and the first sub-image to be displayed and the second sub-image to be displayed formed by reflection and convergence of the first reflection amplifying element and the second reflection amplifying element can be spliced into the image to be displayed visually by a user. The near-eye display optical module and the near-eye display system have the characteristics of large field of view and high resolution, and have smaller volume compared with the near-eye display optical module and the near-eye display system with the traditional display optical module.

Description

Near-eye display optical module and near-eye display system
Technical Field
The invention relates to the technical field of augmented reality, in particular to a near-eye display optical module and a near-eye display system.
Background
Augmented reality (AR, augmented Reality) is a technology for performing reality augmentation on a real scene by using virtual objects or information, and is widely used in various fields such as scientific research, military, industry, games, video, education, and the like. Currently, a mainstream near-eye display system applied to augmented reality generally adopts a miniature image display as an image source, and is matched with a traditional display optical module (a half-reflection half-transmission plane mirror and a traditional visual optical system) to realize enhanced display. Limited to the state of the art and technology, the resolution of miniature image displays is difficult to increase. Moreover, the display field of view of the conventional display optical module is closely related to the volume of the display optical module. The display field is increased, and the volume of the conventional display optical module is increased dramatically. Therefore, the currently mainstream near-eye display system applied to augmented reality has problems of low resolution, and small or large field of view.
Disclosure of Invention
Accordingly, the present invention is directed to a compact near-eye display optical module with large field of view and high resolution and a near-eye display system, which solve the above-mentioned problems.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the preferred embodiment of the invention provides a near-eye display optical module, which comprises an electric control liquid crystal polarizing element, an electric control optical device, a first reflection amplifying element, a second reflection amplifying element, a phase delay plate and a reflecting element;
The image display device sequentially outputs a first beam of sub-image light and a second beam of sub-image light of an image to be displayed, wherein the first beam of sub-image light and the second beam of sub-image light are collimated parallel light beams with a first linear polarization direction, each image to be displayed comprises a first sub-image to be displayed and a second sub-image to be displayed, the first beam of sub-image light corresponds to the first sub-image to be displayed, and the second beam of sub-image light corresponds to the second sub-image to be displayed;
the electronic control liquid crystal polarization element is arranged on an emergent light path of the image display device and is used for changing the polarization direction of the incident first beam of sub-image light or the second beam of sub-image light into a second linear polarization direction after the control voltage is applied, and the second linear polarization direction is orthogonal to the first linear polarization direction;
the electronic control optical device is arranged between the electronic control liquid crystal polarizing element and the first reflection amplifying element and is used for converging or diverging the incident first beam of sub-image light after the control voltage is applied;
the first reflection amplifying element and the second reflection amplifying element are sequentially arranged on an emergent light path of the electric control optical device and are polarization sensitive reflection converging elements, and the polarization sensitive reflection converging elements are respectively used for enabling a first beam of sub-image light to form a first sub-image to be displayed on a human eye and enabling a second beam of sub-image light to form a second sub-image to be displayed on the human eye;
The phase delay plate is arranged between the second reflection amplifying element and the reflection element and is used for converting the polarization direction of the second beam of sub-image light into an elliptical polarization direction or a circular polarization direction and converting the polarization direction of the second beam of sub-image light which is reflected, converged or reflected and diverged from the reflection element into a non-first linear polarization direction or a non-second linear polarization direction;
the reflecting element is used for carrying out reflection convergence or reflection divergence on the second beam of sub-image light rays with elliptical polarization direction or circular polarization direction;
after the image display device outputs a first beam of sub-image light and a second beam of sub-image light of an image to be displayed, the first sub-image to be displayed and the second sub-image to be displayed formed by human eyes can be spliced into the image to be displayed visually by a user;
the real world ambient light enters the human eye through the near-eye display optical module to form an ambient image.
Optionally, the electronic control optical device is used for converging the incident first beam of sub-image light after the control voltage is applied, and the focal plane of the electronic control optical device after the voltage is applied is located between the electronic control optical device and the first reflection amplifying element;
The reflection element is used for carrying out reflection convergence on the second beam of sub-image light rays in the elliptical polarization direction or the circular polarization direction, and the reflection focal plane of the reflection element is arranged on one side of the reflection element close to the second reflection amplifying element.
Optionally, the electric control optical device is used for dispersing the incident first beam of sub-image light after the control voltage is applied, and the focal plane of the electric control optical device after the voltage is applied is positioned at one side of the electric control optical device close to the electric control liquid crystal polarizing element;
the reflection element is used for carrying out reflection and divergence on the second beam of sub-image light rays in the elliptical polarization direction or the circular polarization direction, and the reflection focal plane of the reflection element is arranged at one side of the reflection element far away from the phase delay plate.
Optionally, the first reflective amplifying element and the second reflective amplifying element are arranged to reflect and converge sub-image light rays of the first linear polarization direction and to transmit sub-image light rays of the second linear polarization direction.
Optionally, the first reflective amplifying element and the second reflective amplifying element are arranged to reflect and converge sub-image light rays of the second linear polarization direction and to transmit sub-image light rays of the first linear polarization direction.
Optionally, the near-eye display optical module further includes a polarization conversion element disposed between the first reflective amplifying element and the second reflective amplifying element, and polarization sensitivity of the second reflective amplifying element and the first reflective amplifying element is different.
Optionally, the near-eye display optical module further includes an absorption-type polarizing element disposed in a reflection convergence direction of the first and second reflection amplifying elements.
Optionally, the near-eye display optical module further comprises a beam expanding system.
Optionally, the near-eye display optical module further comprises a beam shrinking system.
The present invention also provides a near-eye display system, which includes an image display device and the near-eye display optical module.
According to the near-eye display optical module and the near-eye display system, through ingenious integration and design of the electric control liquid crystal polarizing element, the electric control optical device, the first reflection amplifying element, the second reflection amplifying element, the phase delay plate and the reflecting element, a first sub-image to be displayed is formed on human eyes through the first reflection amplifying element, a second sub-image to be displayed is formed on human eyes through the second reflection amplifying element, and the first sub-image to be displayed and the second sub-image to be displayed formed on human eyes are spliced into the image to be displayed in a user vision mode through the vision residual effect. Therefore, the angle of view of the near-eye display optical module and the near-eye display system is equal to the sum of the angles of view of the first reflective amplifying element and the second reflective amplifying element. And, the resolutions of the first sub-image to be displayed and the second sub-image to be displayed may be the same and equal to the resolution of the image to be displayed. Therefore, the near-eye display optical module and the near-eye display system have high resolution while displaying large-view-field images, and have smaller volumes compared with the near-eye display optical module and the near-eye display system which are applied to augmented reality and have the traditional display optical module. Meanwhile, the near-eye display optical module and the imaging method of the near-eye display system based on the reflection imaging principle enable images after reflection and convergence to have no chromatic aberration, and the center and the edge of the amplified images have consistent definition based on the amplified imaging of beamlets.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described. It is to be understood that the following drawings illustrate only certain embodiments of the invention and are therefore not to be considered limiting of its scope, for the person of ordinary skill in the art may admit to other equally relevant drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a near-eye display system according to an embodiment of the present invention.
Fig. 2 is a schematic view of an optical path of the near-eye display system shown in fig. 1 for displaying an image to be displayed.
Fig. 3 is a schematic view of another optical path of the near-eye display system shown in fig. 1 for displaying an image to be displayed.
Fig. 4 is a schematic structural diagram of a near-eye display system according to another embodiment.
Fig. 5 is a schematic structural diagram of a near-eye display system according to another embodiment.
Fig. 6 is a schematic structural diagram of a near-eye display system according to another embodiment.
Fig. 7 is a schematic structural diagram of a near-eye display system according to another embodiment.
Fig. 8 is a comparison of the field angle of a near-eye display system without a beam expanding system.
Fig. 9 is a schematic structural diagram of a near-eye display system according to another embodiment.
Icon, 10-near eye display optical module; 1-a near-eye display system; 50-an image display device; 11-an electronically controlled liquid crystal polarizing element; 13-electronically controlled optics; 15-a first reflective amplifying element; 17-a second reflective amplifying element; 19-phase retarder; a 21-reflecting element; a 23-polarization conversion element; 25-absorbing polarizing element; a 27-beam expanding system; 29-beam condensing system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. In the description of the present invention, the terms "first," "second," "third," "fourth," and the like are used merely to distinguish between descriptions and are not to be construed as merely or implying relative importance.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a near-eye display system 1 according to an embodiment of the invention. The near-eye display system 1 can be applied to an augmented reality device such as an HMD (Head Mount Display, head-mounted type visual device) or smart glasses, and is not limited thereto. The near-eye display system 1 includes a near-eye display optical module 10 and an image display device 50. The near-eye display optical module 10 includes an electronically controlled liquid crystal polarizing element 11, electronically controlled optics 13, a first reflective amplifying element 15, a second reflective amplifying element 17, a phase retarder 19, and a reflective element 21.
In the case of performing enhanced display, the near-eye display optical module 10 needs to be matched with the image display device 50 to construct the near-eye display system 1. The image display device 50 is configured to sequentially output a first sub-image light beam and a second sub-image light beam of an image to be displayed, where the first sub-image light beam and the second sub-image light beam are collimated parallel light beams having a first linear polarization direction. The image to be displayed is a virtual image displayed by the near-eye display system 1, i.e. a virtual display of artificial additional information to the real world environment. Each image to be displayed comprises a first sub-image to be displayed and a second sub-image to be displayed. In order to improve the display effect, the resolutions of the first sub-image to be displayed and the second sub-image to be displayed may be the same. And the first sub-image to be displayed and the second sub-image to be displayed may be the same or different in size. The first beam of sub-image light corresponds to a first sub-image to be displayed, that is, the image display device 50 outputs the first beam of sub-image light according to the first sub-image to be displayed. The second beam of sub-image light corresponds to a second sub-image to be displayed, that is, the image display device 50 outputs the second beam of sub-image light according to the second sub-image to be displayed. In practical implementation, the image display device 50 may be composed of a transmissive or reflective LOCS display source and an illumination light source assembly capable of outputting collimated parallel light illumination, or may be composed of a fiber scanning imaging system and a collimation system. In this embodiment, the image display device 50 is composed of a transmissive LOCS display source and an illumination light source assembly capable of outputting collimated parallel light illumination.
The electrically controlled liquid crystal polarizing element 11 is disposed on the outgoing light path of the image display device 50. The electronically controlled liquid crystal polarizing element 11 is configured to change the phase of an incident polarized light beam (the first sub-image light beam or the second sub-image light beam) after the control voltage is applied, and change the polarization direction of the first sub-image light beam or the second sub-image light beam to a second linear polarization direction. When the electronically controlled liquid crystal polarizing element 11 changes the phase of the incident polarized light beam by pi phase after the control voltage is applied, the electronically controlled liquid crystal polarizing element 11 is equivalent to a 1/2 glass slide, and the first linear polarization direction and the second linear polarization direction are orthogonal. That is, the first sub-image light and the second sub-image light are collimated parallel light beams having the first linear polarization direction, and the first sub-image light or the second sub-image light after the phase change of the first sub-image light or the second sub-image light by the electronically controlled liquid crystal polarizing element 11 is collimated parallel light beams having the second linear polarization direction. Wherein the first linear polarization direction and the second linear polarization direction are orthogonal.
The electrically controlled optical device 13 is arranged between the electrically controlled liquid crystal polarizing element 11 and the first reflective amplifying element 15. The electronically controlled optics 13 have no converging function for the incident parallel light beam (first beam sub-image light) when no control voltage is applied. The electronically controlled optics 13 have a converging function for the incident parallel light beam (first beam of sub-image light) when a control voltage is applied. When the electro-optic device 13 converges the incident parallel light beam upon application of the control voltage, a focal plane of the electro-optic device 13 after the application of the voltage may be located between the electro-optic device 13 and the first reflective amplifying element 15.
The first reflection amplifying element 15 and the second reflection amplifying element 17 are sequentially arranged on the outgoing light path of the electronic control optical device 13. The first and second reflection amplifying elements 15 and 17 are polarization-sensitive reflective elements having a reflection converging function for an incident light beam. The first reflective amplifying element 15 and the second reflective amplifying element 17 are arranged to reflect and converge sub-image light rays of the first linear polarization direction (or the second linear polarization direction) and to transmit sub-image light rays of the second linear polarization direction (or the first linear polarization direction). That is, the first reflective amplifying element 15 and the second reflective amplifying element 17 are arranged to reflect and converge sub-image light rays of the first linear polarization direction and transmit sub-image light rays of the second linear polarization direction. Alternatively, the first reflective amplifying element 15 and the second reflective amplifying element 17 are arranged to reflect and converge sub-image light rays of the second linear polarization direction and to transmit sub-image light rays of the first linear polarization direction.
The phase retarder 19 is disposed between the second reflection amplifying element 17 and the reflection element 21. The phase retarder 19 is used to convert the polarization direction of the sub-image light of the first linear polarization direction (or the second linear polarization direction) into an elliptical polarization direction or a circular polarization direction, and to convert the sub-image light of the elliptical polarization direction or the circular polarization direction reflected from the reflecting element 21 into a non-first linear polarization direction (or a non-second linear polarization direction). Wherein the non-first linear polarization direction comprises a second linear polarization direction and the non-second linear polarization direction comprises the first linear polarization direction. When the retarder 19 is a 1/4 glass slide, the retarder 19 is configured to convert the polarization direction of the sub-image light of the first linear polarization direction (or the second linear polarization direction) into a circular polarization direction, and to completely convert the sub-image light of the circular polarization direction reflected from the reflective element 21 into the second linear polarization direction (or the first linear polarization direction).
The reflecting element 21 is used to return the sub-image light having an elliptical polarization direction or a circular polarization direction, which is transmitted from the phase retarder 19, toward the second reflective amplifying element 17. The reflection working surface of the reflection element 21 has a function of converging parallel light beams. The reflecting element 21 may be a concave reflecting curved surface or a reflecting diffraction plane provided with a concave reflecting equivalent function. When the reflection operation surface of the reflection element 21 converges the parallel light beams, the reflection focal surface of the reflection element 21 may be disposed on a side of the reflection element 21 near the second reflection amplifying element 17.
When the first reflective amplifying element 15 and the second reflective amplifying element 17 are disposed to reflect and converge the sub-image light in the first linear polarization direction and transmit the sub-image light in the second linear polarization direction, the near-eye display system 1 provided in this embodiment performs a virtual image display as follows: dividing one image to be displayed into two sub-images to be displayed in the horizontal direction, and respectively recording the two sub-images to be displayed as a first sub-image to be displayed and a second sub-image to be displayed. As shown in fig. 2, the image display device 50 outputs a first beam of sub-image light according to a first sub-image to be displayed, the first beam of sub-image light being a collimated parallel light beam having a first linear polarization direction. The control voltage is not applied to the electric control liquid crystal polarizing element 11, the control voltage is applied to the electric control optical device 13, the first sub-image light rays with the first linear polarization direction penetrate through the electric control liquid crystal polarizing element 11 and are converged by the electric control optical device 13, and the converged first sub-image light rays with the first linear polarization direction are reflected and converged by the first reflection amplifying element 15 to form a first sub-image to be displayed on human eyes. The image display device 50 outputs a second beam of sub-image light according to the second sub-image to be displayed, the second beam of sub-image light being a collimated parallel light beam having the first linear polarization direction. A control voltage is applied to the electrically controlled liquid crystal polarizing element 11 and the second beam of sub-image light having the first linear polarization direction is converted by the electrically controlled liquid crystal polarizing element 11 into a second beam of sub-image light having the second linear polarization direction. No control voltage is applied to the electrically controlled optical device 13, and since the first reflective amplifying element 15 and the second reflective amplifying element 17 are arranged to reflect and converge the sub-image light in the first linear polarization direction and transmit the sub-image light in the second linear polarization direction, the second sub-image light having the second linear polarization direction is transmitted to the phase retarder 19 through the electrically controlled optical device 13, the first reflective amplifying element 15 and the second reflective amplifying element 17 in order. The polarization direction of the second sub-image light having the second linear polarization direction transmitted to the retarder 19 is converted into an elliptical polarization direction or a circular polarization direction by the retarder 19, and then is transmitted to the reflective element 21, reflected by the reflective element 21, converged between the reflective element 21 and the second reflective amplifying element 17, and then is converted into a non-second linear polarization direction from the elliptical polarization direction or the circular polarization direction after passing through the retarder 19 again. The second sub-image light rays with the first linear polarization direction among the second sub-image light rays with the non-second linear polarization direction are reflected and converged by the second reflection amplifying element 17 to form a second sub-image to be displayed at the human eye.
In fig. 2, the distance from the refractive transmission focal plane SF9 of the electro-optic device 13 to the first reflective amplifying element 15 is denoted as L92, and the distance from the reflective focal plane SF5 of the reflective element 21 to the second reflective amplifying element 17 is denoted as L53. The refraction convergence angle of the electrically controlled optical device 13 for the parallel light beam (first sub-image light) from the electrically controlled polarization conversion element 23 is denoted as afa9, and the reflection convergence angle of the reflective element 21 for the parallel light beam (second sub-image light) from the electrically controlled polarization conversion element 23 is denoted as afa5. The dimension of the sub-image light transmitted by the image display device 50 in the direction shown in the drawing is denoted by H1, and the effective aperture half heights of the first reflection amplifying element 15 and the second reflection amplifying element 17 in the direction shown in the drawing are denoted by H2 and H3, respectively. In practice, afa9 and afa5 and L92 and L53 may be set to be identical or not identical. By setting afa9 and afa5 to be identical and setting L92 and L53 to be identical, the reflection and diffraction structure of the first reflection and amplification element 15 and the reflection and diffraction structure of the second reflection and amplification element 17 are identical, so that the design, processing cost and assembly difficulty of each element can be reduced, and batch production of the near-to-eye display optical module 10 is facilitated.
Similarly, when the first reflective amplifying element 15 and the second reflective amplifying element 17 are configured to reflect and converge the sub-image light in the second linear polarization direction and transmit the sub-image light in the first linear polarization direction, the process of performing one virtual image display by the near-eye display system 1 provided in this embodiment is as follows: dividing one image to be displayed into two sub-images to be displayed in the horizontal direction, and respectively recording the two sub-images to be displayed as a first sub-image to be displayed and a second sub-image to be displayed. As shown in fig. 3, the image display device 50 outputs a first beam of sub-image light according to a first sub-image to be displayed, the first beam of sub-image light being a collimated parallel light beam having a first linear polarization direction. A control voltage is applied to the electrically controlled liquid crystal polarizing element 11, a control voltage is applied to the electrically controlled optical device 13, the first sub-image light having the first linear polarization direction is converted into the first sub-image light having the second linear polarization direction by the electrically controlled liquid crystal polarizing element 11, the first sub-image light having the second linear polarization direction is converged by the electrically controlled optical device 13, and the converged first sub-image light having the second linear polarization direction is reflected and converged by the first reflection amplifying element 15 to form a first sub-image to be displayed on the human eye. The image display device 50 outputs a second beam of sub-image light according to the second sub-image to be displayed, the second beam of sub-image light being a collimated parallel light beam having the first linear polarization direction. The second sub-image light having the first linear polarization direction is transmitted to the phase retarder 19 through the electrically controlled liquid crystal polarizing element 11, the electrically controlled optical device 13, the first reflective amplifying element 15, and the second reflective amplifying element 17 without applying a control voltage to the electrically controlled liquid crystal polarizing element 11 and the electrically controlled optical device 13. The polarization direction of the second sub-image light beam with the first linear polarization direction transmitted to the retarder 19 is converted into the elliptical polarization direction or the circular polarization direction by the retarder 19, and then the second sub-image light beam continues to transmit to the reflecting element 21, is reflected and converged between the reflecting element 21 and the second reflecting amplifying element 17 by the reflecting element 21, and is converted into the non-first linear polarization direction from the elliptical polarization direction or the circular polarization direction after passing through the retarder 19 again. The second sub-image light rays with the second linear polarization direction in the second sub-image light rays with the non-first linear polarization direction are reflected and converged by the second reflection amplifying element 17, and a second sub-image to be displayed is formed on the human eye.
In the above process, the process of forming the first sub-image to be displayed and the second sub-image to be displayed in the human eye is retinal imaging, so that clear imaging can be performed in the whole display field of view. The first sub-image to be displayed and the second sub-image to be displayed respectively formed at human eyes can be spliced into the images to be displayed visually by adjusting the frequency of outputting each sub-image light by the image display device 50 and the time interval of outputting each image to be displayed, and by matching with adjusting the working states of the electric control liquid crystal polarizing element 11 and the electric control optical device 13, etc., and utilizing the principle of vision residue.
Real world ambient light enters the human eye through the near-eye display optical module 10 to form an ambient image.
According to the near-to-eye display optical module 10 provided by the embodiment of the invention, through ingenious integration and design of the electric control liquid crystal polarizing element 11, the electric control optical device 13, the first reflection amplifying element 15, the second reflection amplifying element 17, the phase delay sheet 19 and the reflecting element 21, a first sub-image to be displayed is formed on the human eye and a second sub-image to be displayed is formed on the human eye by the second reflection amplifying element 17 in sequence, and the first sub-image to be displayed and the second sub-image to be displayed formed on the human eye are spliced into the images to be displayed in a visual way by a user by utilizing a visual residual effect. Therefore, the angle of view of the near-eye display optical module 10 is equal to the sum of the angles of view of the first reflective amplifying element 15 and the second reflective amplifying element 17. And, the resolutions of the first sub-image to be displayed and the second sub-image to be displayed may be the same and equal to the resolution of the image to be displayed. Therefore, the near-eye display optical module 10 has high resolution while displaying a large field of view image, and has a smaller volume than the near-eye display optical module 10 having a conventional display optical module applied to augmented reality. Meanwhile, the near-eye display optical module 10 enables images after reflection and convergence to have no chromatic aberration based on an imaging method of a reflection imaging principle, and enables centers and edges of the amplified images to have consistent definition based on amplified imaging of beamlets.
Based on the above inventive concept, the specific structure of the near-eye display system 1 may also be, but is not limited to, as shown in fig. 4 to 8. It can be seen that the near-eye display system 1 shown in fig. 1 has two working principles shown in fig. 2 and 3, and that the two working principles shown in fig. 2 and 3 are similar, except that: the first and second reflective amplifying elements 15, 17 in fig. 2 are arranged to reflect and converge sub-image light rays of the first linear polarization direction and to transmit sub-image light rays of the second linear polarization direction, whereas the first and second reflective amplifying elements 15, 17 in fig. 3 are arranged to reflect and converge sub-image light rays of the second linear polarization direction and to transmit sub-image light rays of the first linear polarization direction. Therefore, for convenience of description, in the description of fig. 4, only the operation principle shown in fig. 2 will be described as an example.
Referring to fig. 4, fig. 4 is a block diagram of a near-eye display system 1 according to another embodiment. Similar to fig. 1, the difference is that: when a control voltage is applied to the electric control optical device 13, the electric control optical device has a divergence function on an incident parallel light beam (first beam of sub-image light), and the focal plane of the electric control optical device 13 after the voltage is applied is positioned on one side of the electric control optical device 13 close to the electric control liquid crystal polarizing element 11. That is, the electronically controlled optics 13 have a function equivalent to a negative focal length lens acting on the divergence of the parallel light beam when a control voltage is applied. The reflection working surface of the reflection element 21 has a function of diverging the parallel light beam, and the reflection focal surface of the reflection element 21 is disposed on a side of the reflection element 21 away from the phase retarder 19. The first reflection amplifying element 15 and the second reflection amplifying element are respectively provided to have a reflection converging function for an incident divergent light beam.
It can be seen that the near-eye display system 1 shown in fig. 4 has a smaller size with comparable image display capabilities to be displayed than the near-eye display system 1 shown in fig. 1.
Referring to fig. 5, fig. 5 is a block diagram of a near-eye display system 1 according to another embodiment. Similar to fig. 1, the difference is that: the near-eye display optical module 10 further includes a polarization conversion element 23 disposed between the first reflective amplifying element 15 and the second reflective amplifying element 17, and the second reflective amplifying element 17 and the first reflective amplifying element 15 are different in polarization sensitivity. If the first reflective amplifying element 15 is arranged to reflect and converge sub-image light rays of the first linear polarization direction and to transmit sub-image light rays of the second linear polarization direction, the second reflective amplifying element 17 is arranged to reflect and converge sub-image light rays of the second linear polarization direction and to transmit sub-image light rays of the first linear polarization direction. If the first reflective amplifying element 15 is arranged to reflect and converge sub-image light rays of the second linear polarization direction and to transmit sub-image light rays of the first linear polarization direction, the second reflective amplifying element 17 is arranged to reflect and converge sub-image light rays of the first linear polarization direction and to transmit sub-image light rays of the second linear polarization direction. The pi phase retardation can be increased every time the sub-image light having the linear polarization direction passes the polarization conversion element 23, so that the polarization direction of the sub-image light can be converted into a polarization direction orthogonal thereto.
When the first reflection amplifying element 15 is configured to reflect and converge the sub-image light in the first linear polarization direction and transmit the sub-image light in the second linear polarization direction, the second reflection amplifying element 17 is configured to reflect and converge the sub-image light in the second linear polarization direction and transmit the sub-image light in the first linear polarization direction, the electric control optical device 13 has a convergence function on the incident first sub-image light when the control voltage is applied, and the focal plane of the electric control optical device 13 after the voltage is applied is located between the electric control optical device 13 and the first reflection amplifying element 15, and the reflection focal plane of the reflection element 21 is disposed on the side of the reflection element 21 near the second reflection amplifying element 17, and the process of performing one virtual image display is as follows: the image display device 50 outputs a first sub-image light beam according to the first sub-image to be displayed, the first sub-image light beam being a collimated parallel light beam having a first linear polarization direction. The control voltage is not applied to the electric control liquid crystal polarizing element 11, the control voltage is applied to the electric control optical device 13, the first sub-image light rays with the first linear polarization direction penetrate through the electric control liquid crystal polarizing element 11 and are converged by the electric control optical device 13, and the converged first sub-image light rays with the first linear polarization direction are reflected and converged by the first reflection amplifying element 15 to form a first sub-image to be displayed on human eyes. The image display device 50 outputs a second beam of sub-image light according to the second sub-image to be displayed, the second beam of sub-image light being a collimated parallel light beam having the first linear polarization direction. A control voltage is applied to the electrically controlled liquid crystal polarizing element 11 and the second beam of sub-image light having the first linear polarization direction is converted by the electrically controlled liquid crystal polarizing element 11 into a second beam of sub-image light having the second linear polarization direction. The second beam of sub-image light with the second linear polarization direction is transmitted through the electronic control optical device 13 and the first reflection amplifying element 15 in sequence, is converted into the first linear polarization direction by the polarization conversion element 23, and then is transmitted to the phase retarder 19 through the second reflection amplifying element 17 without applying a control voltage to the electronic control optical device 13. The polarization direction of the second sub-image light beam with the first linear polarization direction transmitted to the retarder 19 is converted into the elliptical polarization direction or the circular polarization direction by the retarder 19, and then the second sub-image light beam continues to transmit to the reflecting element 21, is reflected and converged between the reflecting element 21 and the second reflecting amplifying element 17 by the reflecting element 21, and is converted into the non-first linear polarization direction from the elliptical polarization direction or the circular polarization direction after passing through the retarder 19 again. The second sub-image light rays with the second linear polarization direction in the second sub-image light rays with the non-first linear polarization direction are reflected and converged by the second reflection amplifying element 17, and a second sub-image to be displayed is formed on the human eye.
When the first reflection amplifying element 15 is configured to reflect and converge the sub-image light in the second linear polarization direction and transmit the sub-image light in the first linear polarization direction, the second reflection amplifying element 17 is configured to reflect and converge the sub-image light in the first linear polarization direction and transmit the sub-image light in the second linear polarization direction, the electric control optical device 13 has a convergence function on the incident first sub-image light when the control voltage is applied, and the focal plane of the electric control optical device 13 after the voltage is applied is located between the electric control optical device 13 and the first reflection amplifying element 15, and the reflection focal plane of the reflection element 21 is disposed on the side of the reflection element 21 near the second reflection amplifying element 17, and the process of performing one virtual image display is as follows: the image display device 50 outputs a first sub-image light beam according to the first sub-image to be displayed, the first sub-image light beam being a collimated parallel light beam having a first linear polarization direction. A control voltage is applied to the electrically controlled liquid crystal polarizing element 11, a control voltage is applied to the electrically controlled optical device 13, the first sub-image light having the first linear polarization direction is converted into the first sub-image light having the second linear polarization direction by the electrically controlled liquid crystal polarizing element 11, the first sub-image light having the second linear polarization direction is converged by the electrically controlled optical device 13, and the converged first sub-image light having the second linear polarization direction is reflected and converged by the first reflection amplifying element 15 to form a first sub-image to be displayed on the human eye. The image display device 50 outputs a second beam of sub-image light according to the second sub-image to be displayed, the second beam of sub-image light being a collimated parallel light beam having the first linear polarization direction. The second sub-image light having the first linear polarization direction is transmitted through the electrically controlled liquid crystal polarizing element 11, the electrically controlled optical element 13, and the first reflective amplifying element 15 without applying a control voltage to the electrically controlled liquid crystal polarizing element 11 and the electrically controlled optical element 13, and is transmitted through the second reflective amplifying element 17 to the phase retarder 19 after being converted into the second linear polarization direction by the polarization conversion element 23. The polarization direction of the second sub-image light having the second linear polarization direction transmitted to the retarder 19 is converted into an elliptical polarization direction or a circular polarization direction by the retarder 19, and then is transmitted to the reflective element 21, reflected by the reflective element 21, converged between the reflective element 21 and the second reflective amplifying element 17, and then is converted into a non-second linear polarization direction from the elliptical polarization direction or the circular polarization direction after passing through the retarder 19 again. The second sub-image light rays with the first linear polarization direction among the second sub-image light rays with the non-second linear polarization direction are reflected and converged by the second reflection amplifying element 17 to form a second sub-image to be displayed at the human eye.
It is obvious that the polarization conversion element 23 can also be applied to the near-eye display system 1 provided in other embodiments of the present invention, and for saving the space, the description is omitted here.
As shown in fig. 6, fig. 6 is a block diagram of a near-eye display system 1 according to another embodiment. Similar to fig. 1, the difference is that: the near-eye display optical module 10 further includes an absorptive polarizing element 25, and the first reflective amplifying element 15 and the second reflective amplifying element 17 are concave reflective converging elements having continuous curved surfaces. The absorption type polarizing element 25 is disposed in the reflection convergence direction of the first reflection amplifying element 15 and the second reflection amplifying element 17, and is used for absorbing the sub-image light in the second linear polarization direction (or the first linear polarization direction), and transmitting the sub-image light in the first linear polarization direction (or the second linear polarization direction), so as to eliminate the background interference and improve the contrast ratio of the first sub-image to be displayed and the second sub-image to be displayed. The absorption type polarizing element 25 is configured to absorb the sub-image light of the second linear polarization direction and transmit the sub-image light of the first linear polarization direction when the first reflection amplifying element 15 and the second reflection amplifying element 17 are arranged to reflect and converge the sub-image light of the first linear polarization direction and transmit the sub-image light of the second linear polarization direction. The absorption type polarizing element 25 is configured to absorb the sub-image light of the first linear polarization direction and transmit the sub-image light of the second linear polarization direction when the first reflection amplifying element 15 and the second reflection amplifying element 17 are arranged to reflect and converge the sub-image light of the second linear polarization direction and transmit the sub-image light of the first linear polarization direction.
The absorption-type polarizing element 25 is configured to absorb sub-image light rays of the second linear polarization direction when the first reflection amplifying element 15 and the second reflection amplifying element 17 are arranged to reflect and converge sub-image light rays of the first linear polarization direction and transmit sub-image light rays of the second linear polarization direction. When the control voltage is applied to the electronic control optical device 13, the electronic control optical device 13 has a converging function on the incident first beam of sub-image light, and the focal plane of the electronic control optical device 13 after the voltage is applied is located between the electronic control optical device 13 and the first reflection amplifying element 15, and the reflection focal plane of the reflection element 21 is arranged at one side of the reflection element 21 near the second reflection amplifying element 17. In performing the virtual image display once, the image display device 50 outputs a first sub-image light according to the first sub-image to be displayed, where the first sub-image light is a collimated parallel light beam having a first linear polarization direction. The control voltage is not applied to the electric control liquid crystal polarizing element 11, the control voltage is applied to the electric control optical device 13, the first beam of sub-image light with the first linear polarization direction is converged by the electric control optical device 13 after passing through the electric control liquid crystal polarizing element 11, and most of the converged first beam of sub-image light with the first linear polarization direction is reflected and converged by the first reflection amplifying element 15 and passes through the absorption type polarizing element 25 to form a first sub-image to be displayed on human eyes; a small part of the light beams of the first beam of sub-images with the second linear polarization direction are reflected by the second reflection amplifying element 17 and the absorption type polarizing element 25 after being transmitted through the first reflection amplifying element 15, the second reflection amplifying element 17 and the phase delay sheet 19, and then reflected by the reflection element 21 and pass through the phase delay sheet 19 again, the polarization direction is converted from the first linear polarization direction to the second linear polarization direction, and a small part of the light beams of the first beam of sub-images with the second linear polarization direction are absorbed by the absorption type polarizing element 25 after being reflected by the second reflection amplifying element 17 (while most part of the light beams pass through the second reflection amplifying element 17). The image display device 50 outputs a second beam of sub-image light according to the second sub-image to be displayed, the second beam of sub-image light being a collimated parallel light beam having the first linear polarization direction. A control voltage is applied to the electrically controlled liquid crystal polarizing element 11 and the second beam of sub-image light having the first linear polarization direction is converted by the electrically controlled liquid crystal polarizing element 11 into a second beam of sub-image light having the second linear polarization direction. The control voltage is not applied to the electronic control optical device 13, most of the second sub-image light with the second linear polarization direction passes through the first reflection amplifying element 15, the second reflection amplifying element 17 and the phase delay sheet 19, then is reflected by the reflection element 21, passes through the phase delay sheet 19 again, is converted into the second sub-image light with the non-second linear polarization direction by the phase delay sheet 19, and the second sub-image light with the first linear polarization direction in the second sub-image light with the non-second linear polarization direction is reflected and converged by the second reflection amplifying element 17, passes through the absorption type polarizing element 25, and forms a second sub-image to be displayed on the human eye. A small portion of the second sub-image light having the second linear polarization direction is reflected by the first reflective amplifying element 15 and then absorbed by the absorptive polarizing element 25.
The absorption-type polarizing element 25 is used to absorb sub-image light rays of the first linear polarization direction when the first reflection amplifying element 15 and the second reflection amplifying element 17 are arranged to reflect and converge sub-image light rays of the second linear polarization direction and to transmit sub-image light rays of the first linear polarization direction. When the control voltage is applied to the electronic control optical device 13, the electronic control optical device 13 has a converging function on the incident first beam of sub-image light, and the focal plane of the electronic control optical device 13 after the voltage is applied is located between the electronic control optical device 13 and the first reflection amplifying element 15, and the reflection focal plane of the reflection element 21 is arranged at one side of the reflection element 21 near the second reflection amplifying element 17. In performing the virtual image display once, the image display device 50 outputs a first sub-image light according to the first sub-image to be displayed, where the first sub-image light is a collimated parallel light beam having a first linear polarization direction. Applying a control voltage to the electrically controlled liquid crystal polarizing element 11, applying a control voltage to the electrically controlled optical element 13, converting the first sub-image light having the first linear polarization direction into the first sub-image light having the second linear polarization direction by the electrically controlled liquid crystal polarizing element 11, converging the first sub-image light having the second linear polarization direction by the electrically controlled optical element 13, and reflecting and converging most of the converged first sub-image light having the second linear polarization direction by the first reflection amplifying element 15, and forming a first sub-image to be displayed on the human eye through the absorption type polarizing element 25; a small part of the first sub-image light rays with the first linear polarization direction are reflected by the second reflective amplifying element 17 and then reflected by the reflective element 21 and pass through the phase retarder 19 again, and the polarization direction is converted from the second linear polarization direction to the first linear polarization direction, and a small part of the first sub-image light rays with the first linear polarization direction are absorbed by the absorption type polarizing element 25 after being reflected by the second reflective amplifying element 17 (while a large part of the first sub-image light rays are transmitted through the second reflective amplifying element 17). The image display device 50 outputs a second beam of sub-image light according to the second sub-image to be displayed, the second beam of sub-image light being a collimated parallel light beam having the first linear polarization direction. The second sub-image light having the first linear polarization direction is mostly transmitted to the phase retarder 19 through the first reflective amplifying element 15 and the second reflective amplifying element 17 without applying a control voltage to the electrically controlled liquid crystal polarizing element 11 and the electrically controlled optical device 13. The second sub-image light with the first linear polarization direction is mostly reflected by the reflecting element 21 after passing through the first reflecting amplifying element 15, the second reflecting amplifying element 17 and the phase retarder 19, passes through the phase retarder 19 again, is converted into the second sub-image light with the non-first linear polarization direction by the phase retarder 19, and the second sub-image light with the second linear polarization direction in the second sub-image light with the non-first linear polarization direction is reflected and converged by the second reflecting amplifying element 17, passes through the absorption type polarizing element 25, and forms a second sub-image to be displayed on the human eye. A small portion of the second sub-image light having the first linear polarization direction is reflected by the first reflective amplifying element 15 and then absorbed by the absorptive polarizing element 25.
Similarly, when the electric control optical device 13 applies the control voltage, the electric control optical device 13 may have a divergence function for the incident parallel light beam (the first sub-image light beam), and the focal plane of the electric control optical device 13 after applying the voltage is located at the side of the electric control optical device 13 close to the electric control liquid crystal polarizing element 11, the reflection working plane of the reflecting element 21 has a divergence function for the parallel light beam, the reflection focal plane of the reflecting element 21 is disposed at the side of the reflecting element 21 far away from the retarder 19, and the first reflection amplifying element 15 and the second reflection amplifying element are respectively disposed to have a reflection convergence function for the incident divergent light beam, so that the absorption polarizing element 25 may also be applied for saving space and not described herein.
Because the reflective working surfaces of the first reflective amplifying element 15 and the second reflective amplifying element 17 are continuous concave surfaces, the polarizing reflective film layer plated on the concave surfaces thereof cannot completely achieve the reflection diffraction in the first linear polarization direction and the transmission in the second linear polarization direction or the reflection diffraction in the second linear polarization direction and the transmission in the first linear polarization direction in theory and in the actual plating process, so that the absorption type polarizing element 25 is arranged in the reflection convergence direction of the first reflective amplifying element 15 and the second reflective amplifying element 17, and can absorb the light rays of the sub-images in the second linear polarization direction (or the first linear polarization direction), thereby eliminating the background interference and improving the contrast ratio of the first sub-image to be displayed and the second sub-image to be displayed.
Similarly, for the near-eye display optical module 10 shown in fig. 1, 4, 5, 7 and 9, the absorption type polarizing element 25 may be disposed in the reflection convergence direction of the first reflection amplifying element 15 and the second reflection amplifying element 17 to eliminate background interference and improve the contrast ratio of the first sub-image to be displayed and the second sub-image to be displayed, which is not described herein. For the near-eye display system 1 shown in fig. 6, an absorption type polarizing element may be disposed in the reflection convergence direction of the first reflection amplifying element 15 and the second reflection amplifying element 17, respectively, for absorbing the sub-image light rays of the first linear polarization direction and the second linear polarization direction, respectively.
Referring to fig. 7, fig. 7 is a block diagram of a near-eye display system 1 according to another embodiment. Similar to fig. 1, the difference is that: the near-eye display optical module 10 further comprises a beam expanding system 27, wherein the beam expanding system 27 is arranged on the side of the electrically controlled liquid crystal polarizing element 11 away from the first reflection amplifying element 15. The beam expanding system 27 is used for converting a beam having a small-size spot into a beam having a large-size spot. The beam expanding system 27 can be applied to the near-eye display optical module 10 shown in fig. 1 to form the structure shown in fig. 7, and can also be applied to the near-eye display optical module 10 shown in fig. 4 to 6 to form a new structure, wherein the small-size light spot refers to that the light spot size of the light beam is smaller than the effective optical caliber required by the preset electronic control optical device 13, and the large-size light spot refers to that the light spot size of the light beam is consistent with the effective optical caliber required by the preset electronic control optical device 13.
The beam expanding system 27 may be an inverted telescopic system, and the telescopic system is generally formed by an objective lens and an eyepiece, wherein an image side focal point of the objective lens and an object side focal point of the eyepiece coincide, and the telescopic system has two structural forms of kepler and galilean. When the telescopic system is used reversely, the light beam with the small-size light spot is converged or diverged through the ocular lens first, and then is collimated into the light beam with the large-size light spot by the objective lens. The image display device 50 having a small-size spot beam is enabled to obtain a large beam convergence angle by using the beam expanding system 27 in the present embodiment, thereby enabling a large display field angle. As shown in fig. 7 and 8, the angle of view afa2 of the image display device 50 having the small-size spot beam reflected and amplified by the first reflection and amplification element 15 is smaller than the angle of view afa1 of the image display device 50 having the large-size spot beam reflected and amplified by the first reflection and amplification element 15 after being expanded by the beam expansion system 27.
As shown in fig. 9, fig. 9 is a block diagram of a near-eye display system 1 according to another embodiment. Similar to fig. 1, the difference is that: the near-eye display optical module 10 further comprises a beam shrinking system 29, wherein the beam shrinking system 29 is arranged on one side of the electrically controlled liquid crystal polarizing element 11 away from the first reflection amplifying element 15. The beam expanding system 27 is used for converting a beam having a large-size spot into a beam having a small-size spot. The beam condensing system 29 can be applied to the near-eye display optical module 10 shown in fig. 1 to form the structure shown in fig. 7, and can also be applied to the near-eye display optical module 10 shown in fig. 4 to 6 to form a new structure, wherein the small-size light spot refers to that the light spot size of the light beam is smaller than the effective optical caliber required by the preset electronic control optical device 13, and the large-size light spot refers to that the light spot size of the light beam is consistent with the effective optical caliber required by the preset electronic control optical device 13.
The beam condensing system 29 may be a telescopic system, and in use, a beam having a large-size spot is first condensed or diverged by the objective lens and then collimated by the eyepiece into a beam having a small-size spot. The image display device 50 having a large-sized spot beam can be fully reflected and amplified by the first reflection amplifying element 15 or the second reflection amplifying element 17 by using the beam condensing system 29 in the present embodiment, the large-sized image display device 50 can be used for the near-eye display optical module 10 by using the beam condensing system 29 in the present embodiment and optimal energy utilization can be obtained.
According to the near-eye display optical module 10 and the near-eye display system 1 provided by the embodiment of the invention, through ingenious integration and design of the electric control liquid crystal polarizing element 11, the electric control optical device 13, the first reflection amplifying element 15, the second reflection amplifying element 17, the phase delay piece 19 and the reflection element 21, a first sub-image to be displayed is formed on the human eye and a second sub-image to be displayed is formed on the human eye by the first reflection amplifying element 15 in sequence, and the first sub-image to be displayed and the second sub-image to be displayed formed on the human eye are spliced into the images to be displayed in the vision of a user by utilizing the vision residual effect. Therefore, the angle of view of the near-eye display optical module 10 and the near-eye display system 1 is equal to the sum of the angles of view of the first reflective amplifying element 15 and the second reflective amplifying element 17. And, the resolutions of the first sub-image to be displayed and the second sub-image to be displayed may be the same and equal to the resolution of the image to be displayed. Therefore, the near-eye display optical module 10 and the near-eye display system 1 have high resolution while displaying large field of view images, and have smaller volume than the near-eye display optical module 10 and the near-eye display system 1 having conventional display optical modules applied to augmented reality. Meanwhile, the near-eye display optical module 10 and the near-eye display system 1 have no chromatic aberration based on the imaging method of the reflection imaging principle, and have consistent definition based on the magnified imaging of the beamlets.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The near-eye display optical module is characterized by comprising an electric control liquid crystal polarizing element, an electric control optical device, a first reflection amplifying element, a second reflection amplifying element, a phase delay plate and a reflecting element;
the image display device sequentially outputs a first beam of sub-image light and a second beam of sub-image light of an image to be displayed, wherein the first beam of sub-image light and the second beam of sub-image light are collimated parallel light beams with a first linear polarization direction, each image to be displayed comprises a first sub-image to be displayed and a second sub-image to be displayed, the first beam of sub-image light corresponds to the first sub-image to be displayed, and the second beam of sub-image light corresponds to the second sub-image to be displayed;
The electronic control liquid crystal polarization element is arranged on an emergent light path of the image display device and is used for changing the polarization direction of the incident first beam of sub-image light or the second beam of sub-image light into a second linear polarization direction after the control voltage is applied, and the second linear polarization direction is orthogonal to the first linear polarization direction;
the electronic control optical device is arranged between the electronic control liquid crystal polarizing element and the first reflection amplifying element and is used for converging or diverging the incident first beam of sub-image light after the control voltage is applied;
the first reflection amplifying element and the second reflection amplifying element are sequentially arranged on an emergent light path of the electric control optical device and are polarization sensitive reflection converging elements, and the polarization sensitive reflection converging elements are respectively used for enabling a first beam of sub-image light to form a first sub-image to be displayed on a human eye and enabling a second beam of sub-image light to form a second sub-image to be displayed on the human eye;
the phase delay plate is arranged between the second reflection amplifying element and the reflection element and is used for converting the polarization direction of the second beam of sub-image light into an elliptical polarization direction or a circular polarization direction and converting the polarization direction of the second beam of sub-image light which is reflected, converged or reflected and diverged from the reflection element into a non-first linear polarization direction or a non-second linear polarization direction;
The reflecting element is used for carrying out reflection convergence or reflection divergence on the second beam of sub-image light rays with elliptical polarization direction or circular polarization direction;
after the image display device outputs a first beam of sub-image light and a second beam of sub-image light of an image to be displayed, the first sub-image to be displayed and the second sub-image to be displayed formed by human eyes can be spliced into the image to be displayed visually by a user;
the real world ambient light enters the human eye through the near-eye display optical module to form an ambient image.
2. The near-eye display optical module of claim 1, wherein the electrically controlled optical device is configured to converge the incident first sub-image light after the control voltage is applied, and a focal plane of the electrically controlled optical device after the voltage is applied is located between the electrically controlled optical device and the first reflective amplifying element;
the reflection element is used for carrying out reflection convergence on the second beam of sub-image light rays in the elliptical polarization direction or the circular polarization direction, and the reflection focal plane of the reflection element is arranged on one side of the reflection element close to the second reflection amplifying element.
3. The near-eye display optical module of claim 1, wherein the electrically controlled optical device is configured to diverge the incident first sub-image light after the control voltage is applied, and a focal plane of the electrically controlled optical device after the voltage is applied is located at a side of the electrically controlled optical device near the electrically controlled liquid crystal polarizing element;
The reflection element is used for carrying out reflection and divergence on the second beam of sub-image light rays in the elliptical polarization direction or the circular polarization direction, and the reflection focal plane of the reflection element is arranged at one side of the reflection element far away from the phase delay plate.
4. A near-eye display optical module as claimed in claim 2 or 3, characterized in that the first and second reflective amplifying elements are arranged to reflect and converge sub-image light rays of a first linear polarization direction and to transmit sub-image light rays of a second linear polarization direction.
5. A near-eye display optical module as claimed in claim 2 or 3, characterized in that the first and second reflective amplifying elements are arranged to reflect and converge sub-image light rays of the second linear polarization direction and to transmit sub-image light rays of the first linear polarization direction.
6. A near-eye display optical module as claimed in any one of claims 1-3, characterized in that the near-eye display optical module further comprises a polarization conversion element arranged between the first and second reflective amplifying elements, and the second and first reflective amplifying elements are of different polarization sensitivity types.
7. A near-eye display optical module as claimed in any one of claims 1-3, characterized in that the near-eye display optical module further comprises an absorbing polarizing element arranged in the direction of reflection convergence of the first and second reflection amplifying elements.
8. A near-eye display optical module as claimed in any one of claims 1-3, wherein the near-eye display optical module further comprises a beam expanding system.
9. A near-eye display optical module as claimed in any one of claims 1-3, wherein the near-eye display optical module further comprises a beam-condensing system.
10. A near-eye display system comprising an image display device and a near-eye display optical module according to any one of claims 1-9.
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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015157482A1 (en) * 2014-04-09 2015-10-15 3M Innovative Properties Company Near-eye display system having a pellicle as a combiner
CN105093555A (en) * 2015-07-13 2015-11-25 深圳多新哆技术有限责任公司 Short-distance optical magnification module group and near-to-eye display optical module group using the same
CN106842571A (en) * 2017-01-18 2017-06-13 上海乐蜗信息科技有限公司 The optical system of augmented reality equipment
WO2017181864A1 (en) * 2016-04-22 2017-10-26 成都理想境界科技有限公司 Near-eye display system
CN107329273A (en) * 2017-08-29 2017-11-07 京东方科技集团股份有限公司 A kind of nearly eye display device
CN107678166A (en) * 2017-11-22 2018-02-09 深圳创维新世界科技有限公司 Augmented reality display device
CN107765435A (en) * 2017-11-22 2018-03-06 深圳创维新世界科技有限公司 Head-wearing display device
CN107807448A (en) * 2017-12-08 2018-03-16 深圳创维新世界科技有限公司 Virtual reality display optical system
CN107831593A (en) * 2017-12-08 2018-03-23 深圳创维新世界科技有限公司 Augmented reality display optical system and augmented reality glasses
CN208384240U (en) * 2018-04-20 2019-01-15 深圳创维新世界科技有限公司 Nearly eye shows optics module and near-eye display system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015157482A1 (en) * 2014-04-09 2015-10-15 3M Innovative Properties Company Near-eye display system having a pellicle as a combiner
CN105093555A (en) * 2015-07-13 2015-11-25 深圳多新哆技术有限责任公司 Short-distance optical magnification module group and near-to-eye display optical module group using the same
WO2017181864A1 (en) * 2016-04-22 2017-10-26 成都理想境界科技有限公司 Near-eye display system
CN106842571A (en) * 2017-01-18 2017-06-13 上海乐蜗信息科技有限公司 The optical system of augmented reality equipment
CN107329273A (en) * 2017-08-29 2017-11-07 京东方科技集团股份有限公司 A kind of nearly eye display device
CN107678166A (en) * 2017-11-22 2018-02-09 深圳创维新世界科技有限公司 Augmented reality display device
CN107765435A (en) * 2017-11-22 2018-03-06 深圳创维新世界科技有限公司 Head-wearing display device
CN107807448A (en) * 2017-12-08 2018-03-16 深圳创维新世界科技有限公司 Virtual reality display optical system
CN107831593A (en) * 2017-12-08 2018-03-23 深圳创维新世界科技有限公司 Augmented reality display optical system and augmented reality glasses
CN208384240U (en) * 2018-04-20 2019-01-15 深圳创维新世界科技有限公司 Nearly eye shows optics module and near-eye display system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
可寻址光线屏蔽机制光学透视式增强现实显示系统研究;周雅;马晋涛;刘宪鹏;王红;常军;;仪器仪表学报(第06期);176-180 *

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