Display device and augmented reality display apparatus

Abstract

The application provides a display device and an augmented reality display device. The display device comprises a display assembly, a galvanometer assembly, a first waveguide and a second waveguide. The display assembly is used for periodically and alternately emitting a first image and a second image. The galvanometer assembly is arranged on a light-emitting path of the display assembly and is used for receiving light beams emitted by the display assembly. The galvanometer assembly has a first light-emitting path and a second light-emitting path. The first waveguide is arranged on the first light-emitting path. The second waveguide is arranged on the second light-emitting path. The first light-emitting path and the second light-emitting path of the galvanometer assembly periodically and alternately emit light beams, so that the first image is completely emitted to a left eye through the first waveguide or the second image is completely emitted to a right eye through the second waveguide. The technical scheme can improve the display effect of the display device.

Description

Technical Field

[0001] This invention relates to the field of augmented display technology, and in particular to a display device and an augmented reality display apparatus. Background Technology

[0002] In related technologies, in order to achieve lightweight and miniaturized design of augmented reality display devices and reduce the manufacturing cost of augmented reality display devices, the display device of the augmented reality display device can adopt a single optical engine solution. The beam emitted by a single optical engine can be split into two beams by a beam splitting component and emitted to the left and right eyes of the human along two optical paths respectively to achieve the effect of stereoscopic display.

[0003] However, the technical solution of splitting the beam emitted from a single optical engine into two beams by using a beam splitter will result in the brightness of the beam entering the left and right eyes being half the original brightness of the optical engine, which will affect the display effect of the display device. Summary of the Invention

[0004] The main objective of this invention is to provide a display device and an augmented reality display device, which aim to improve the display effect of the display device.

[0005] To achieve the above objectives, the present invention provides a display device comprising:

[0006] A display component is used to periodically and alternately emit a first image and a second image;

[0007] A galvanometer assembly is disposed on the light emission path of the display assembly and is used to receive the light beam emitted by the display assembly. The galvanometer assembly has a first light emission path and a second light emission path.

[0008] A first waveguide, wherein the first waveguide is disposed on the first light output path; and

[0009] The second waveguide is disposed on the second light output path;

[0010] The first and second light-emitting paths of the galvanometer assembly periodically alternately emit light beams, so that the first image is entirely emitted to the left eye through the first waveguide, or the second image is entirely emitted to the right eye through the second waveguide.

[0011] Optionally, the galvanometer assembly includes:

[0012] A galvanometer is disposed on the light-emitting path of the display component and has a first reflection position and a second reflection position. The galvanometer periodically folds back and forth between the first reflection position and the second reflection position to alternately receive the first image and the second image.

[0013] A first reflecting structure, disposed on one side of the galvanometer, is used to receive the light beam reflected by the galvanometer when it is at the first reflecting position, and to reflect the light beam along the first light-emitting path to the first waveguide; and

[0014] The second reflection structure is located on the side of the galvanometer away from the first reflection structure. It is used to receive the light beam reflected by the galvanometer when it is in the second reflection position and reflect the light beam along the second light output path to the second waveguide.

[0015] Optionally, the axis of the galvanometer is set perpendicular to the light emission direction of the display component and perpendicular to the arrangement direction of the first reflective structure and the second reflective structure. Two electrodes are respectively provided at both ends of the galvanometer, and the two electrodes are arranged opposite to each other along the extension direction of the axis.

[0016] The galvanometer is used to rotate in the positive direction around the axis to the first reflection position when a positive voltage is applied to the two electrodes, or to rotate in the opposite direction around the axis to the second reflection position when a reverse voltage is applied to the two electrodes.

[0017] Optionally, when the galvanometer is in the first reflection position, the normal of the galvanometer is arranged parallel to the normal of the first reflection structure;

[0018] When the galvanometer is in the second reflection position, the normal of the galvanometer and the normal of the second reflection structure are arranged parallel to each other.

[0019] Optionally, when the galvanometer is in the first reflection position, the angle between the normal of the galvanometer and the light emission direction of the display component is in the range of 30° to 60°.

[0020] When the galvanometer is in the second reflection position, the angle between the normal of the galvanometer and the light emission direction of the display component is in the range of -30° to -60°.

[0021] Optionally, the scanning frequency of the galvanometer is at least 200 Hz.

[0022] Optionally, the surface of the galvanometer facing the display assembly is provided with a first reflective film;

[0023] And / or, the first reflective structure has a second reflective film on the side surface facing the galvanometer;

[0024] And / or, the second reflective structure has a third reflective film on the side surface facing the galvanometer.

[0025] Optionally, the galvanometer is a circular sheet.

[0026] Optionally, the display component includes:

[0027] An optical engine, which is used to periodically and alternately emit a first image and a second image;

[0028] A collimating lens is disposed on the light output path of the optical engine and is used to convert the light beam of the optical engine into a parallel light beam.

[0029] The present invention also proposes an augmented reality display device, comprising the display apparatus described in any one of the foregoing claims, wherein the display apparatus includes:

[0030] A display component is used to periodically and alternately emit a first image and a second image;

[0031] A galvanometer assembly is disposed on the light emission path of the display assembly and is used to receive the light beam emitted by the display assembly. The galvanometer assembly has a first light emission path and a second light emission path.

[0032] A first waveguide, wherein the first waveguide is disposed on the first light output path; and

[0033] The second waveguide is disposed on the second light output path;

[0034] The first and second light-emitting paths of the galvanometer assembly periodically alternately emit light beams, so that the first image is entirely emitted to the left eye through the first waveguide, or the second image is entirely emitted to the right eye through the second waveguide.

[0035] The technical solution of this invention, by setting a galvanometer assembly on the light-emitting path of the display component, enables the light beam emitted by the display component to be periodically and alternately transmitted along a first light-emitting path and a second light-emitting path. Furthermore, the display component can correspondingly and periodically alternately emit a first image and a second image. With this configuration, when the display component emits the first image, the light beam of the first image can be entirely transmitted along the first light-emitting path to the first waveguide via the galvanometer assembly, and then entirely emitted to the left eye via the first waveguide. When the display component emits the second image, the light beam of the second image can be entirely transmitted along the second light-emitting path to the second waveguide via the galvanometer assembly, and then entirely emitted to the right eye via the second waveguide. Thus, a single display component can alternately emit corresponding images along two optical paths to the left and right eyes of the user, achieving a stereoscopic display effect. Moreover, the image is not split during transmission, which helps avoid energy loss in the optical engine, thereby ensuring the brightness of the light beam entering the eyes and improving the display effect of the display device. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0037] Figure 1 This is a structural diagram of an embodiment of the display device of the present invention;

[0038] Figure 2 for Figure 1 Partial structural diagram of the galvanometer assembly of the display device;

[0039] Figure 3 for Figure 1 A schematic diagram of the first light emission path of the galvanometer assembly in the display device;

[0040] Figure 4 for Figure 1 A schematic diagram of the second light emission path of the galvanometer assembly in the display device.

[0041] Explanation of icon numbers:

[0042] 100 Display device 211 axis 10 Display components 212 electrode 11 Optical mechanism 22 First reflection structure 12 collimating lens 23 Second reflection structure 20 Galvanometer assembly 30 First Waveguide 21 Galvanometer 40 Second waveguide

[0043] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0045] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0048] Traditional augmented reality (AR) display devices often employ a dual-optical-engine (DAE) design, where two optical engines project images to the left and right eyes respectively. However, this dual-optical-engine approach increases manufacturing costs and hinders lightweight and miniaturized designs. In related technologies, some AR display devices can also use a single-optical-engine (SAE) design. The beam emitted from a single optical engine is split into two beams by a beam splitter, each projected along a separate optical path to the left and right eyes to achieve a stereoscopic effect. However, this beam splitting technique results in the image being split during transmission, leading to the brightness of the beams reaching the left and right eyes being only half the original brightness of the optical engine. Therefore, the present invention proposes a display device 100, in which the light beam emitted by the display component 10 is periodically and alternately transmitted along the first light emission path and the second light emission path by the galvanometer assembly 20, so that the light beam emitted by the display component 10 can be emitted to the left and right eyes of the human in a time-division alternating manner, and the image is not split during transmission, which helps to avoid energy loss of the optical engine 11, ensures the brightness of the light beam entering the human eye, and thus improves the display effect of the display device 100.

[0049] Please refer to Figures 1 to 4 In some embodiments of the display device of the present invention, the display device 100 includes:

[0050] Display component 10, the display component 10 being used to periodically alternately emit a first image and a second image;

[0051] A galvanometer assembly 20 is disposed on the light emission path of the display assembly 10 and is used to receive the light beam emitted by the display assembly 10. The galvanometer assembly 20 has a first light emission path and a second light emission path.

[0052] A first waveguide 30 is disposed on the first light output path; and

[0053] The second waveguide 40 is disposed on the second light output path;

[0054] The first and second light-emitting paths of the galvanometer assembly 20 periodically emit light beams alternately, so that the first image is emitted entirely to the left eye through the first waveguide 30, or the second image is emitted entirely to the right eye through the second waveguide 40.

[0055] In this embodiment, the display component 10 includes a single optical engine 11, which can periodically and alternately emit a first image and a second image. The first image can be emitted into the coupling region of the first waveguide 30 along the first light emission path through the galvanometer assembly 20. After the first image enters the substrate of the first waveguide 30 from the coupling region of the first waveguide 30, it can undergo total internal reflection within the first waveguide 30 and be emitted into the left eye from the coupling region of the first waveguide 30. Similarly, the second image can be emitted into the coupling region of the second waveguide 40 along the second light emission path through the galvanometer assembly 20. After the second image enters the substrate of the second waveguide 40 from the coupling region of the second waveguide 40, it can undergo total internal reflection within the second waveguide 40 and be emitted into the right eye from the coupling region of the second waveguide 40.

[0056] It is understandable that by alternately transmitting the first and second images emitted by a single display component 10 to the left and right eyes, the persistence of vision in the human eye can be utilized to achieve the goal of seeing different images with each eye. This simulates the difference in images on the retinas of the left and right eyes when a person is looking at an object, allowing the brain to determine the spatial relationship of the object based on the differences in images between the left and right eyes, thus achieving a stereoscopic vision effect. Compared to a display device using two optical engines 11, this reduces the number of optical engines 11, thereby reducing the manufacturing cost of the display device and facilitating its lightweight and miniaturized design.

[0057] Furthermore, the technical solution of using the galvanometer assembly 20 to alternately transmit the light emitted from the display assembly 10 along the first light-emitting path and the second light-emitting path to the first waveguide 30 and the second waveguide 40, compared with the solution of splitting the light emitted from the display assembly 10 into two beams and transmitting them to the first waveguide 30 and the second waveguide 40 simultaneously, can avoid energy loss of the optomechanical 11. This facilitates the improvement of the brightness of the virtual image display of the display device, so as to achieve a better display effect.

[0058] Please refer to Figures 1 to 4 In some embodiments of the display device of the present invention, the galvanometer assembly 20 includes:

[0059] A galvanometer 21 is disposed on the light-emitting path of the display component 10 and has a first reflection position and a second reflection position. The galvanometer 21 periodically folds back and forth between the first reflection position and the second reflection position to alternately receive the first image and the second image.

[0060] A first reflecting structure 22 is disposed on one side of the galvanometer 21, for receiving the light beam reflected by the galvanometer 21 when it is at the first reflecting position, and reflecting the light beam along the first light-emitting path to the first waveguide 30; and

[0061] The second reflection structure 23 is disposed on the side of the galvanometer 21 away from the first reflection structure 22, and is used to receive the light beam reflected by the galvanometer 21 when it is in the second reflection position, and reflect the light beam along the second light output path to the second waveguide 40.

[0062] In this embodiment, the galvanometer 21 is movably disposed on the light-emitting path of the display component 10 and has a first reflection position and a second reflection position. The galvanometer 21 can achieve high-frequency resonant scanning under electrostatic or voltage driving control, so as to perform high-frequency folding motion between the first reflection position and the second reflection position, so that the galvanometer 21 can uniformly transmit the received light beam to the first reflection structure 22 and the second reflection structure 23 in a time-division manner.

[0063] Based on this, the galvanometer assembly 20 may also include a packaging substrate, which encapsulates the galvanometer 21, the first reflective structure 22, and the second reflective structure 23 together. This packaging substrate can better fix the relative positions of the various components of the galvanometer assembly 20 and improve the ease of installation of the galvanometer assembly 20. Of course, the galvanometer 21, the first reflective structure 22, and the second reflective structure 23 of the galvanometer assembly 20 can also be installed independently, which is not limited here.

[0064] Please refer to Figure 1 and Figure 2 In some embodiments of the display device of the present invention, the axis 211 of the galvanometer 21 is arranged perpendicular to the light emission direction of the display component 10 and perpendicular to the arrangement direction of the first reflective structure 22 and the second reflective structure 23. Two electrodes 212 are respectively provided at both ends of the galvanometer 21, and the two electrodes 212 are arranged opposite to each other along the extension direction of the axis 211.

[0065] The galvanometer 21 is used to rotate in the positive direction around the axis 211 to the first reflection position when a positive voltage is applied to the two electrodes 212, or to rotate in the opposite direction around the axis 211 to the second reflection position when a reverse voltage is applied to the two electrodes 212.

[0066] In this embodiment, the axis 211 of the galvanometer 21 is perpendicular to the light emission direction of the display component 10 and perpendicular to the arrangement direction of the first reflective structure 22 and the second reflective structure 23. This allows the galvanometer 21 to rotate around the axis 211 with its mirror surface facing either the first reflective structure 22 or the second reflective structure 23. Two electrodes 212 are also provided at both ends of the axis 211 of the galvanometer 21. These electrodes 212 can be designated as a positive electrode 212 and a negative electrode 212, respectively, and are disposed on opposite sides of the galvanometer 21. When a positive voltage is applied between the two electrodes 212, the galvanometer 21 can rotate forward around the axis 211. When a reverse voltage is applied between the two electrodes 212, the galvanometer 21 can rotate backward around the axis 211. By periodically alternating between applying positive and reverse voltages to the two electrodes 212, the galvanometer 21 can oscillate back and forth around the axis 211, thereby achieving periodic switching between the first and second reflection positions.

[0067] In some embodiments of the display device of the present invention, when the galvanometer 21 is in the first reflection position, the normal of the galvanometer 21 is arranged parallel to the normal of the first reflection structure 22.

[0068] When the galvanometer 21 is in the second reflection position, the normal of the galvanometer 21 and the normal of the second reflection structure 23 are arranged parallel to each other.

[0069] In this embodiment, the galvanometer 21 has a first reflection position and a second reflection position, and is capable of periodically zigzagging between the first reflection position and the second reflection position. When the galvanometer 21 is in the first reflection position, the galvanometer 21 and the first reflection structure 22 are spaced apart relative to each other, and the normal of the galvanometer 21 and the normal of the first reflection structure 22 are parallel to each other. Similarly, when the galvanometer 21 is in the second reflection position, the galvanometer 21 and the second reflection structure 23 are spaced apart relative to each other, and the normal of the galvanometer 21 and the normal of the second reflection structure 23 are parallel to each other. Thus, the direction of the incident beam of the galvanometer assembly 20 is made to be the same as the direction of the emitted beam.

[0070] In some embodiments of the display device of the present invention, when the galvanometer 21 is in the first reflection position, the angle between the normal of the galvanometer 21 and the light emission direction of the display component 10 is in the range of 30° to 60°.

[0071] When the galvanometer 21 is in the second reflection position, the angle between the normal of the galvanometer 21 and the light emission direction of the display component 10 is in the range of -30° to -60°.

[0072] In this embodiment, when the galvanometer 21 is rotated to the first reflection position, the angle between the normal of the galvanometer 21 and the light emission direction of the display component 10 is in the range of 30° to 60°. It can be, but is not limited to, values ​​of 30°, 35°, 40°, 45°, 50°, 55°, 60°, etc. By cooperating the galvanometer 21 with the first reflection structure 22, the angle between the light beam of the first light emission path of the galvanometer component 20 and the normal of the first waveguide 30 is limited to -15° to 15° when the light beam is incident on the first waveguide 30. Similarly, when the galvanometer 21 is rotated to the second reflection position, the angle between the normal of the galvanometer 21 and the light emission direction of the display component 10 is in the range of -30° to -60°, and can be, but is not limited to, -30°, -35°, -40°, -45°, -50°, -55°, -60°, etc. By cooperating the galvanometer 21 with the first reflection structure 22, the angle between the light beam of the second light emission path and the normal of the second waveguide 40 when the light beam is incident on the second waveguide 40 can be limited to within the range of -15° to -15°; in this way, the transmission effect of the light beam incident on the first waveguide 30 or the second waveguide 40 in the waveguide can be ensured.

[0073] Preferably, when the galvanometer 21 is in the first reflection position, the angle between the normal of the galvanometer 21 and the light emission direction of the display component 10 is 45°. This allows the light beam to be reflected by the galvanometer 21 and then transmitted towards the first reflection structure 22 along the arrangement direction parallel to the first reflection structure 22 and the second reflection structure 23. When the galvanometer 21 is in the first reflection position, the angle between the normal of the galvanometer 21 and the light emission direction of the display component 10 is -45°. This allows the light beam to be reflected by the galvanometer 21 and then transmitted towards the second reflection structure 23 along the arrangement direction parallel to the first reflection structure 22 and the second reflection structure 23.

[0074] In some embodiments of the display device of the present invention, the scanning frequency of the galvanometer 21 is at least 200 Hz.

[0075] In this embodiment, since the first and second images are transmitted to the left and right eyes of the user in a time-division manner, both eyes periodically and intermittently receive the light beam emitted by the display component 10. This allows imaging to be achieved by utilizing the persistence of vision mechanism of the human eye. Furthermore, the frequency at which the display component 10 periodically and alternately emits the first and second images is adapted to the scanning frequency of the galvanometer 21. This ensures that when the galvanometer 21 is in the first reflection position, the display component 10 projects the first image, or when the galvanometer 21 is in the second reflection position, the display component 10 projects the second image. The scanning frequency of the galvanometer 21 can be, but is not limited to, 200Hz, 220Hz, 240Hz, etc., ensuring that each eye can receive images at a high frequency, thereby guaranteeing the continuity of image reception and achieving a better display effect.

[0076] In some embodiments of the display device of the present invention, the surface of the galvanometer 21 facing the display component 10 is provided with a first reflective film;

[0077] And / or, the surface of the first reflective structure 22 facing the galvanometer 21 is provided with a second reflective film;

[0078] And / or, the second reflective structure 23 has a third reflective film on the side surface facing the galvanometer 21.

[0079] In this embodiment, the galvanometer 21 includes a galvanometer 21 body and a first reflective film. The first reflective film can be deposited onto the surface of the galvanometer 21 body facing the display component 10 by means of a coating, so as to achieve good adhesion with the surface of the display component 10. In this way, the reflectivity of the galvanometer 21 to visible light can be increased to more than 95%. Similarly, the surface of the first reflective structure 22 facing the galvanometer 21 can be coated with a second reflective film, and the surface of the second reflective structure 23 facing the galvanometer 21 can be coated with a third reflective film. In this way, the brightness loss of the light emitted from the display component 10 during transmission along the first light emission path and the second light emission path can be reduced, thereby making full use of the light emission brightness of the display component 10.

[0080] Please refer to Figure 2 In some embodiments of the display device of the present invention, the galvanometer 21 is a circular sheet.

[0081] In this embodiment, the galvanometer 21 is arranged in the form of a circular sheet, so that the shape of the galvanometer 21 can be adapted to the shape of the light spot of the display component 10.

[0082] Please refer to Figure 1 In some embodiments of the display device of the present invention, the display component 10 includes:

[0083] Optical engine 11, which is used to periodically and alternately emit a first image and a second image;

[0084] A collimating lens 12 is disposed on the light output path of the optical engine 11 and is used to convert the light beam of the optical engine 11 into a parallel light beam.

[0085] In this embodiment, the frequency at which the optical engine 11 periodically emits the first and second images is adapted to the scanning frequency of the galvanometer 21 in the aforementioned embodiment. This ensures that the emission time of the first image corresponds to the time when the galvanometer 21 is at the first reflection position, and the emission time of the second image corresponds to the time when the galvanometer 21 is at the second reflection position. A collimating lens 12 is also provided in the light emission path of the optical engine 11. After passing through the collimating lens 12, the light beam from the optical engine 11 is converted into a parallel beam, which is then collimated and incident on the galvanometer assembly 20. This ensures the accuracy of the optical signal transmission and enables the display assembly 10 to have a better imaging effect.

[0086] The present invention also proposes an augmented reality display device, which includes the display device 100 described in any of the foregoing embodiments, wherein the specific structure of the display device 100 refers to any of the foregoing embodiments. Since the augmented reality display device proposed in this application can apply all the technical solutions in all the foregoing embodiments, it possesses at least all the beneficial effects brought by the foregoing technical solutions, which will not be elaborated upon here.

[0087] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An augmented reality display device, characterized in that, Includes a display device, the display device comprising: A display component is used to periodically and alternately emit a first image and a second image; A galvanometer assembly is disposed on the light emission path of the display assembly and is used to receive the light beam emitted by the display assembly. The galvanometer assembly has a first light emission path and a second light emission path. A first waveguide, wherein the first waveguide is disposed on the first light output path; and The second waveguide is disposed on the second light output path; The first and second light-emitting paths of the galvanometer assembly periodically alternately emit light beams, so that the first image is entirely emitted to the left eye through the first waveguide, or the second image is entirely emitted to the right eye through the second waveguide; the display assembly is located on the side of the first and second waveguides facing the human eye. The galvanometer assembly includes: A galvanometer is disposed on the light-emitting path of the display component and has a first reflection position and a second reflection position. The galvanometer periodically folds back and forth between the first reflection position and the second reflection position to alternately receive the first image and the second image. A first reflecting structure, disposed on one side of the galvanometer, is used to receive the light beam reflected by the galvanometer when it is at the first reflecting position, and to reflect the light beam along the first light-emitting path to the first waveguide; and The second reflection structure is disposed on the side of the galvanometer away from the first reflection structure, and is used to receive the light beam reflected by the galvanometer when it is in the second reflection position, and reflect the light beam along the second light output path to the second waveguide; The galvanometer achieves high-frequency resonant scanning under electrostatic or voltage driving control, and the scanning frequency of the galvanometer is at least 200Hz. The axis of the galvanometer is set perpendicular to the light emission direction of the display component and perpendicular to the arrangement direction of the first reflective structure and the second reflective structure. Two electrodes are respectively provided at both ends of the galvanometer, and the two electrodes are arranged opposite to each other along the extension direction of the axis. The galvanometer is used to rotate in the positive direction around the axis to the first reflection position when a positive voltage is applied to the two electrodes, or to rotate in the opposite direction around the axis to the second reflection position when a reverse voltage is applied to the two electrodes.

2. The augmented reality display device as described in claim 1, characterized in that, When the galvanometer is at the first reflection position, the normal of the galvanometer is parallel to the normal of the first reflection structure. When the galvanometer is in the second reflection position, the normal of the galvanometer and the normal of the second reflection structure are arranged parallel to each other.

3. The augmented reality display device as described in claim 1, characterized in that, When the galvanometer is in the first reflection position, the angle between the normal of the galvanometer and the light emission direction of the display component is in the range of 30° to 60°. When the galvanometer is in the second reflection position, the angle between the normal of the galvanometer and the light emission direction of the display component is in the range of -30° to -60°.

4. The augmented reality display device as described in claim 1, characterized in that, The galvanometer has a first reflective film on the side surface facing the display component; And / or, the first reflective structure has a second reflective film on the side surface facing the galvanometer; And / or, the second reflective structure has a third reflective film on the side surface facing the galvanometer.

5. The augmented reality display device as claimed in claim 1, characterized in that, The galvanometer is a circular sheet.

6. The augmented reality display device as described in any one of claims 1 to 5, characterized in that, The display component includes: An optical engine, which is used to periodically and alternately emit a first image and a second image; A collimating lens is disposed on the light output path of the optical engine and is used to convert the light beam of the optical engine into a parallel light beam.

Images