AR glasses with binocular asynchronous display, one-to-two light engine device and AR glasses equipment

Abstract

The application discloses a kind of binocular asynchronous display AR glasses one-to-two optical machine device and AR glasses equipment, the device includes display unit, liquid crystal electrically controlled polarization modulation panel, wire grid polarizer, left side optical waveguide lens, right side optical waveguide lens and control unit;Liquid crystal electrically controlled polarization modulation panel is arranged at the light side of the display unit;Wire grid polarizer is arranged in front of optical machine lens and with lens optical axis 45 degrees angle;Control unit is electrically connected with display unit, liquid crystal electrically controlled polarization modulation panel respectively, for output time sequence control signal, to preset frequency control display unit left view angle image and right view angle image are alternately displayed, and the power-on or power-off state of liquid crystal electrically controlled polarization modulation panel is synchronously controlled, binocular asynchronous display is realized.This technical scheme realizes the asynchronous output of left and right eye different parallax images, while maintaining high display resolution, adapting to a variety of display devices, ensures the definition and immersion of stereoscopic imaging, reduces equipment cost and volume.

Description

Technical Field

[0001] This invention relates to the field of AR glasses optical engine display technology, and in particular to a binocular asynchronous display AR glasses one-to-two optical engine device and AR glasses equipment. Background Technology

[0002] In the field of binocular display technology for AR glasses, "one-to-two" optical engine devices (i.e., single-optical-engine driven binocular display terminals) have become the mainstream R&D direction in the industry due to their ability to meet the requirements of device miniaturization and low cost. Currently, existing one-to-two solutions on the market are mainly divided into two categories, both of which have obvious technical defects and are difficult to meet the application requirements of high-definition binocular displays.

[0003] The first type is a dual-screen solution that displays the same image simultaneously on both sides. This type of solution uses a single optical engine in conjunction with a beam splitter to project the same image content simultaneously onto the left and right display terminals (such as optical waveguide lenses). The left and right eyes receive the same image, and binocular parallax cannot be formed. Its core drawback is that it can only achieve binocular synchronous presentation of 2D images, which cannot meet the core requirements of 3D display, has limited applicable scenarios, and lacks the immersive feeling of stereoscopic vision.

[0004] The second type is a one-to-two asynchronous display solution for the left and right sides. This type of solution achieves asynchronous display by splitting the optical engine display screen. That is, the image output by a single optical engine is divided into two areas, corresponding to the left and right viewing angles respectively, and then projected to the left and right display terminals through a beam splitting structure. Its core drawback is that after the screen is split, the display resolution corresponding to each eye is significantly reduced (for example, after the original 1080P resolution screen is split, the actual resolution for each eye is only at the 540P level), resulting in insufficient detail in the displayed content, and the image edges are prone to appearing fragmented, seriously affecting the 3D visual experience.

[0005] Meanwhile, existing asynchronous display solutions suffer from poor compatibility with display devices. Most solutions are only compatible with specific types of polarized light displays, lacking effective polarization modulation adaptation schemes for non-polarized light imaging displays such as MicroLED and OLED, thus limiting the versatility of the solutions. Furthermore, some solutions have complex optical path designs and low beam splitting efficiency, making them prone to crosstalk between the left and right eye images, further reducing the clarity and stability of stereoscopic imaging.

[0006] Therefore, how to design a dual-mode optical engine device that can achieve binocular asynchronous display, maintain high display resolution, adapt to various display devices, has a simple structure, and is cost-controllable has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0007] To address the above technical problems, this invention discloses a binocular asynchronous display AR glasses one-to-two optical engine device and AR glasses equipment. It achieves time-division directional modulation of image polarized light through a liquid crystal electronically controlled polarization modulation panel, and combines a beam-splitting guiding structure with a wire grid polarizer and a reflector to achieve asynchronous output of images with different parallaxes for the left and right eyes. While maintaining high display resolution and adapting to various display devices, it ensures the clarity and immersiveness of stereoscopic imaging, reduces equipment cost and size, and overcomes the problems of existing one-to-two optical engine devices where synchronous display schemes cannot achieve 3D display and screen-segmented asynchronous display schemes suffer from reduced resolution.

[0008] The technical solution adopted by this invention is as follows:

[0009] A binocular asynchronous display AR glasses device with one-to-two optical engine components includes a display unit, a liquid crystal electronically controlled polarization modulation panel, a wire grid polarizer, a left optical waveguide lens, a right optical waveguide lens, and a control unit.

[0010] The liquid crystal electronically controlled polarization modulation panel is disposed on the light-emitting side of the display unit and is electrically connected to the control unit, and is used to perform time-division polarization direction modulation on the image polarized light output by the display unit;

[0011] The linear grating polarizer is positioned directly in front of the optical engine lens and forms a 45-degree angle with the lens optical axis. It is used to split the light rays of different polarization states after modulation to the left and right, so that the light rays are guided to the left and right optical waveguide lenses respectively.

[0012] The control unit is electrically connected to the display unit and the liquid crystal electronically controlled polarization modulation panel, respectively, and outputs timing control signals to control the display unit to alternately display left-view and right-view images at a preset frequency, and synchronously controls the power-on or power-off state of the liquid crystal electronically controlled polarization modulation panel, thereby realizing binocular asynchronous display.

[0013] The display unit outputs the image beam; the wire grid polarizer has precise polarization selection characteristics, efficiently reflecting S-polarized light and transmitting P-polarized light, achieving complete separation of the two polarization states and effectively avoiding image crosstalk. The left and right optical waveguide lenses are used to guide the split light to the left and right eyes, respectively.

[0014] As a further improvement of the present invention, the binocular asynchronous display dual-mode optical device includes a first reflector and a second reflector. The first reflector and the second reflector are respectively disposed on the left and right sides of the linear grating polarizer and located on the propagation path of the light after beam splitting. The first reflector is used to receive the polarized light reflected by the linear grating polarizer and reflect it to the coupling window of the left optical waveguide mirror. The second reflector is used to receive the polarized light transmitted by the linear grating polarizer and reflect it to the coupling window of the right optical waveguide mirror, thereby realizing the precise coupling of the imaging light to the optical waveguide coupling window.

[0015] As a further improvement of the present invention, both the first and second reflectors are high-reflectivity mirrors with a reflectivity ≥80%.

[0016] As a further improvement of the present invention, the first reflector and the second reflector are connected to the angle adjustment mechanism, and the installation angle is adjustable to ensure that the light is accurately reflected to the coupling window of the corresponding optical waveguide lens.

[0017] As a further improvement of the present invention, the display unit is a polarized light imaging display, and the image beam it outputs is linearly polarized light in a preset direction. Further, the display unit is an LCOS display. When the display unit is a polarized light display, it outputs S-polarized light by default.

[0018] As a further improvement of the present invention, the display unit is a non-polarized light imaging display, and a polarizer is provided at the light-emitting end of the display unit to modulate the non-polarized image beam into linearly polarized light in a preset direction, that is, the polarizer modulates the non-polarized image light into S-polarized light for output. Further, the display unit is a MicroLED display or an OLED display.

[0019] As a further improvement of the present invention, the nematic liquid crystals inside the liquid crystal electro-polarized modulation panel are arranged in a 90-degree spiral configuration. Its operating logic is as follows: when the control unit controls the panel to be powered on, the electric field causes the liquid crystal molecules to align vertically, without rotating the polarization direction of the incident linearly polarized light; when the control unit controls the panel to be powered off, the liquid crystal molecules return to their 90-degree spiral arrangement, rotating the incident linearly polarized light by 90 degrees (e.g., converting S-polarized light into P-polarized light).

[0020] As a further improvement of the present invention, the nematic liquid crystal layer of the liquid crystal electro-polarized modulation panel has a thickness of 2-10 μm, a polarization rotation efficiency of ≥80% when no power is applied, and a light transmittance of ≥80% when power is applied.

[0021] As a further improvement of the present invention, both the left and right optical waveguide lenses are provided with an input optical window and an output optical window on their surfaces, and a coupling grating structure is provided at the input optical window. Furthermore, the grating period of the coupling grating is 400-600 nm, and the coupling efficiency is ≥85%, ensuring efficient light transmission.

[0022] As a further improvement of the present invention, the control unit includes a display driver chip or an FPGA chip, whose output timing control signal has a phase deviation of ≤1μs, ensuring that the image switching of the display unit is completely synchronized with the polarization state switching of the liquid crystal electronically controlled polarization modulation panel, avoiding image misalignment or flicker. The switching frequency set by the control unit is usually not lower than 60Hz, which is higher than the persistence of vision of the human eye, to achieve flicker-free 3D image synthesis.

[0023] The binocular asynchronous display AR glasses one-to-two optical engine device of the present invention, after activating the control unit, cyclically executes two working stages: left-view image output and right-view image output at a preset frequency.

[0024] Left-view image output stage: The control unit sends a left-view image display signal to the display unit and simultaneously powers on the liquid crystal electronically controlled polarization modulation panel. The display unit outputs S-polarized light carrying the left-view image. After passing through the powered liquid crystal electronically controlled polarization modulation panel, the S-polarized light remains in its S-polarized state and is incident on a 45-degree-angled linear grid polarizer. The linear grid polarizer reflects the S-polarized light, which is then received by the first reflecting mirror and reflected to the coupling window of the left optical waveguide mirror. After being transmitted through the left optical waveguide mirror, the light is projected from the coupling window to the left eye, forming the left-view image received by the left eye.

[0025] Right-view image output stage: The control unit synchronously switches signals, sending a right-view image display signal to the display unit while simultaneously powering off the liquid crystal electronically controlled polarization modulation panel. The display unit outputs S-polarized light carrying the right-view image, which is rotated into P-polarized light after passing through the power-off liquid crystal electronically controlled polarization modulation panel and then incident on the wire grid polarizer. The wire grid polarizer allows the P-polarized light to pass through, and the transmitted P-polarized light is received by the second reflector and reflected to the coupling window of the right optical waveguide mirror. After being conducted by the right optical waveguide mirror, it is projected from the coupling window to the right eye, forming the right-view image received by the right eye.

[0026] Because the switching frequency between the two working stages is higher than the persistence frequency of human vision, the human eye cannot perceive the image switching process and can only continuously receive the left-view image of the left eye and the right-view image of the right eye; there is a preset parallax between the left and right eye images, which are synthesized by the human eye and brain to form a clear and stable 3D stereoscopic image.

[0027] This invention discloses an AR glasses device, which includes a binocular asynchronous display AR glasses one-to-two optical engine device as described above.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] First, it has excellent 3D imaging effect and high asynchronous display efficiency: through time-division polarization modulation of the liquid crystal electronic polarization modulation panel, combined with the beam splitting function of the wire grid polarizer, it realizes asynchronous output of images with different parallax for the left and right eyes, which can directly meet the needs of 3D display and provide a stronger sense of immersive stereoscopic vision; at the same time, it has a high polarization extinction ratio, and the crosstalk rate between the left and right eye images is ≤0.1%, resulting in high image clarity.

[0030] Secondly, it maintains high display resolution and excellent image detail: there is no need to segment the display screen, and the complete image output by the display unit can correspond to the left and right viewing angles respectively. Both the left and right eyes can obtain the full resolution output of the display unit, which greatly improves the image detail and eliminates the sense of image fragmentation.

[0031] Third, it is compatible with a variety of display devices and has strong versatility: it is not only compatible with polarized light displays such as LCOS, but also can achieve polarized light modulation adaptation by adding a polarizer at the light output of non-polarized light displays, breaking the existing solution's single dependence on display devices and making it applicable to a wider range of scenarios.

[0032] Fourth, it has a simple structure and obvious advantages in cost and size: it adopts a single display unit with polarization modulation and beam-splitting guidance structure to replace the traditional dual-optical-engine or complex segmented display architecture. The cost of core components is reduced by more than 50%, the size of the device is reduced by more than 30%, and the weight is reduced by more than 20%, which can effectively meet the development needs of AR / VR devices for lightweighting and miniaturization.

[0033] Fifth, it is simple to control and highly stable: the synchronous control of image display and polarization modulation is achieved through a single control unit, without the need for complex dual-optical-mechanical synchronization mechanisms or image segmentation processing logic, resulting in low control difficulty; the optical path design is simple, the light loss is small (overall light energy utilization rate ≥35%), and the equipment has high working stability. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure and optical path of the device according to an embodiment of the present invention.

[0035] Figure 2 This is a timing diagram of the device operation according to an embodiment of the present invention. In the diagram, the horizontal axis represents time and the vertical axis represents signal state; including: display unit image signal (left view / right view), liquid crystal electronically controlled polarization modulation panel power-on signal (1 power-on / 0 power-off), output polarization state (S light / P light), left eye received image (left view), right eye received image (right view).

[0036] The reference numerals in the attached figures include: 1-display unit, 2-line grid polarizer, 3-liquid crystal electronically controlled polarization modulation panel, 4-first reflector, 5-second reflector, 6-left optical waveguide lens, 61-left input optical window, 62-left output optical window, 7-right optical waveguide lens, 71-right input optical window, 72-right output optical window, 8-left view image, 9-right view image, 10-optical-mechanical lens, 11-PBS polarization beam splitter. Detailed Implementation

[0037] The preferred embodiments of the present invention will be described in further detail below.

[0038] Example 1

[0039] like Figure 1 As shown, a binocular asynchronous display dual-mode optical device is characterized by comprising a display unit 1, a liquid crystal electronically controlled polarization modulation panel 3, a wire grid polarizer 2, a left optical waveguide lens 6, a right optical waveguide lens 7, a control unit, and a PBS polarization beam splitter 11. The PBS polarization beam splitter 11 is located between the display unit 1 and the liquid crystal electronically controlled polarization modulation panel 3.

[0040] Display unit 1 is used to output image beams and can flexibly select either a polarized light display or a non-polarized light display, offering strong adaptability. When an LCOS display (polarized light display, default outputting S-polarized light) is selected, the resolution is 1920×1080, the pixel size is 5μm, and the aperture ratio is ≥85%. If replaced with an OLED display (non-polarized light display), a polarizer (with the polarization direction consistent with S-polarized light) is attached to its light output port to achieve modulation of non-polarized light into S-polarized light.

[0041] The liquid crystal electronically controlled polarization modulation panel 3 is superimposed on the light-emitting side of the display unit 1. The internal nematic liquid crystals are arranged in a 90-degree spiral. The liquid crystal layer thickness is 5μm. The polarization rotation efficiency is ≥99% when no power is applied and the light transmittance is ≥92% when power is applied. The operating voltage is 3-5V.

[0042] The wire-grid polarizer 2, made of aluminum wire-grid polarizer, is positioned directly in front of the optical engine lens 10 at a 45-degree angle to the lens's optical axis. This wire-grid polarizer 2 possesses precise polarization selectivity, efficiently reflecting S-polarized light and transmitting P-polarized light, achieving complete separation of the two polarization states and effectively avoiding image crosstalk. Preferably, the wire-grid polarizer 2 has a wire spacing of 100-200 nm and a linewidth of 50-100 nm. In the visible light band of 450-650 nm, it exhibits an S-light reflectivity ≥80%, a P-light transmittance ≥70%, and a polarization extinction ratio ≥1000.

[0043] First reflector 4 / Second reflector 5: They are made of aluminum-plated high-reflectivity mirrors with a reflectivity ≥80%. The installation angle is adjustable, and the distance between them and the wire grid polarizer 2 is 20mm.

[0044] The left and right waveguide lenses 6 and 7 are respectively positioned on the left and right sides of the optical engine. Their surfaces are respectively equipped with an input window and an output window. The input window receives polarized light transmitted by the reflector, while the output window projects image light to the human eye. The left waveguide lens 6 receives S-polarized light reflected by the first reflector 4 through its input window. This polarized light carries the left-view image 8 and is transmitted through the inside of the waveguide lens before being projected to the left eye through the output window, forming the left-eye image. The right waveguide lens 7 receives P-polarized light reflected by the second reflector 5 through its input window. This polarized light carries the right-view image 9 and is transmitted through the inside of the waveguide lens before being projected to the right eye through the output window, forming the right-eye image. The left and right waveguide lenses 6 and 7 are made of quartz glass and have dimensions of 30mm × 20mm × 1.5mm. The surface of the left optical waveguide lens 6 is provided with a left-side input optical window 61 and a left-side output optical window 62. The surface of the right optical waveguide lens 7 is provided with a right-side input optical window 71 and a right-side output optical window 72. Both the left-side input optical window 61 and the right-side input optical window 71 are provided with coupling gratings (grating period 500nm) with a coupling efficiency ≥88%. The left-side output optical window 62 and the right-side output optical window 72 correspond to a human eye field of view of 40°.

[0045] The control unit is electrically connected to the display unit 1 and the liquid crystal electronically controlled polarization modulation panel 3, respectively. It outputs timing control signals to control the display unit 1 to alternately display the left-view image 8 and the right-view image 9 at a preset frequency, and synchronously controls the power-on or power-off state of the liquid crystal electronically controlled polarization modulation panel 3, thereby achieving asynchronous binocular display. The control unit uses an FPGA chip and is equipped with a timing control module, which can output frequency-adjustable synchronization control signals.

[0046] Assembly Requirements: Each component must be precisely positioned and assembled along the optical path, with an optical axis deviation ≤0.1°; the display unit 1, the liquid crystal electro-polarization modulation panel 3, and the linear grid polarizer 2 are arranged sequentially, with the linear grid polarizer 2 forming a strict 45-degree angle with the optical axis of the optical engine lens 10; the first reflector 4 is positioned to the left of the linear grid polarizer 2, and its installation angle ensures that the received S-polarized light can be reflected to the coupling window of the left optical waveguide lens 6; the second reflector 5 is positioned to the right of the linear grid polarizer 2, and its installation angle ensures that the received P-polarized light can be reflected to the coupling window of the right optical waveguide lens 7; the left optical waveguide lens 6 and the right optical waveguide lens 7 are arranged parallel to each other on the same side of the optical engine, and their coupling windows are precisely aligned with the reflected light from the first reflector 4 and the second reflector 5, respectively; the control unit is connected to the drive interface of the display unit 1 and the voltage control interface of the liquid crystal electro-polarization modulation panel 3 via wires to ensure stable signal transmission.

[0047] The working process of the binocular asynchronous display dual-mode optical-mechanical device is as follows:

[0048] In this embodiment, the control unit is set to a switching frequency of 120Hz (i.e., 60Hz output for each of the left and right view images), and the working timing diagram is as follows. Figure 2 As shown, the working process is as follows:

[0049] Initialization phase: The control unit starts up, completes parameter configuration (switching frequency 120Hz, polarization modulation synchronization phase, etc.), outputs initial synchronization signal, and the display unit and LCD electronically controlled polarization modulation panel enter synchronous standby state to ensure that all components work in a coordinated manner.

[0050] Left-view image output stage (50% duty cycle, approximately 4.17ms): The control unit sends a left-view image display signal to the LCOS display and simultaneously outputs a power-on control signal to the liquid crystal electro-polarization modulation panel. After the liquid crystal electro-polarization modulation panel is powered on, the internal liquid crystal molecules tend to align vertically and do not rotate the S-polarized light output by the LCOS. The light remains in an S-polarized state and is incident on a 45-degree-angled wire grid polarizer. The wire grid polarizer efficiently reflects the S-polarized light, and the reflected S-polarized light propagates to the first reflector on the left side. After being reflected by the first reflector, it is accurately incident on the coupling window of the left optical waveguide lens. The light is efficiently coupled into the left optical waveguide lens through the coupling grating, and after internal transmission, it is projected to the left eye from the output window. The left eye receives the left-view image.

[0051] Right-view image output stage (50% duty cycle, approximately 4.17ms): The control unit synchronously switches signals, sending a right-view image display signal to the LCOS display, while simultaneously stopping the power-on signal output to the liquid crystal polarization modulation panel (panel power off); after the liquid crystal polarization modulation panel is powered off, the internal nematic liquid crystals return to a 90-degree spiral alignment, rotating the S-polarized light output by the LCOS by 90 degrees and modulating it into P-polarized light; after the P-polarized light is incident on the wire grid polarizer, it penetrates the wire grid polarizer and propagates to the second reflector on the right side. After being reflected by the second reflector, it is precisely incident on the coupling window of the right optical waveguide mirror; the light is coupled into the right optical waveguide mirror through the coupling grating, and after internal transmission, it is projected to the right eye from the coupling window, where the right eye receives the right-view image.

[0052] Cyclic Operation Phase: The control unit cyclically switches between the two phases mentioned above at a frequency of 120Hz, realizing the time-division alternating output of S-polarized light (left viewpoint) and P-polarized light (right viewpoint). Since the switching frequency is much higher than the persistence frequency of human vision (typically 24Hz), the human eye cannot perceive the image switching process and can only continuously see the left-eye left-view image and the right-eye right-view image; there is a preset parallax between the left and right eye images (preset according to the requirements of 3D display), which, after being synthesized by the human eye and brain, forms a clear, stable, and flicker-free 3D stereoscopic image.

[0053] A comprehensive performance test was conducted on the device of this embodiment, and the test results are as follows:

[0054] Display performance: Both left and right eyes achieve full resolution output of 1920×1080, with no screen splitting, excellent image detail, and no edge distortion.

[0055] 3D imaging performance: The binocular asynchronous display has good synchronization, accurate left and right parallax matching, clear stereoscopic imaging, and strong immersion; the image crosstalk rate is ≤0.08%, and there is no ghosting;

[0056] Optical performance: Overall light energy utilization rate ≥38%, display brightness ≥320cd / m²; linear grid polarizer S-light reflectivity 92.5%, P-light transmittance 78.2%, polarization extinction ratio 1000;

[0057] Operational stability: No faults during continuous 24-hour operation, no image flickering or misalignment, and timing synchronization deviation ≤0.8μs;

[0058] Cost and size: Compared to the traditional dual-optical-engine solution, the cost is reduced by 55%, the size is reduced by 32%, and the weight is reduced by 23%.

[0059] Test results show that this device fully meets the requirements of binocular asynchronous 3D display. It is superior to the existing one-to-two solution in terms of resolution, imaging effect, stability, and cost control, and can be widely used in various 3D display devices such as AR / VR.

[0060] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A binocular asynchronous display AR glasses one-to-two optical engine device, characterized in that: Includes a display unit, a liquid crystal electronically controlled polarization modulation panel, a wire grid polarizer, a left optical waveguide lens, a right optical waveguide lens, and a control unit; The liquid crystal electronically controlled polarization modulation panel is disposed on the light-emitting side of the display unit and is electrically connected to the control unit, and is used to perform time-division polarization direction modulation on the image polarized light output by the display unit; The linear grating polarizer is positioned directly in front of the optical engine lens and forms a 45-degree angle with the lens optical axis. It is used to split the light rays of different polarization states after modulation to the left and right, so that the light rays are guided to the left and right optical waveguide lenses respectively. The control unit is electrically connected to the display unit and the liquid crystal electronically controlled polarization modulation panel, respectively, and is used to output timing control signals to control the display unit to alternately display the left-view image and the right-view image at a preset frequency, and synchronously control the power-on or power-off state of the liquid crystal electronically controlled polarization modulation panel, thereby realizing binocular asynchronous display.

2. The binocular asynchronous display AR glasses one-to-two optical engine device according to claim 1, characterized in that: It includes a first reflector and a second reflector, which are respectively disposed on the left and right sides of the wire grid polarizer and located on the propagation path of the light after beam splitting. The first reflector is used to receive the polarized light reflected by the wire grid polarizer and reflect it to the coupling window of the left optical waveguide mirror. The second reflector is used to receive the polarized light transmitted by the wire grid polarizer and reflect it to the coupling window of the right optical waveguide mirror.

3. The binocular asynchronous display AR glasses one-to-two optical engine device according to claim 2, characterized in that: Both the first and second reflectors have a reflectivity of ≥80%; the first and second reflectors are connected to the angle adjustment mechanism.

4. The binocular asynchronous display AR glasses one-to-two optical engine device according to claim 1, characterized in that: The display unit is a polarized light imaging display, and the image beam it outputs is linearly polarized light in a preset direction.

5. The binocular asynchronous display AR glasses one-to-two optical engine device according to claim 1, characterized in that: The display unit is a non-polarized light imaging display, and a polarizer is provided at the light emission point of the display unit to modulate the non-polarized image beam into linearly polarized light in a preset direction.

6. The binocular asynchronous display AR glasses one-to-two optical engine device according to claim 1, characterized in that: The nematic liquid crystal layer of the liquid crystal electrically controlled polarization modulation panel has a thickness of 2-10 μm, a polarization rotation efficiency of ≥60% when no power is applied, and a light transmittance of ≥80% when power is applied.

7. The binocular asynchronous display AR glasses one-to-two optical engine device according to claim 1, characterized in that: The surfaces of the left and right optical waveguide lenses are provided with an input optical window and an output optical window, and a coupling grating structure is provided at the input optical window.

8. The binocular asynchronous display AR glasses one-to-two optical engine device according to claim 1, characterized in that: The control unit includes a display driver chip or an FPGA chip, and the timing control signal it outputs has a preset frequency higher than the persistence frequency of human vision.

9. An AR glasses device, characterized in that: The AR glasses with binocular asynchronous display as described in any one of claims 1 to 8 include a dual-optical-mechanical device.

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