Display device and AR glasses

Abstract

The utility model relates to a kind of display device and AR glasses, belong to the field of AR display, it includes optical machine, sliding assembly and light waveguide, optical machine is used to emit image beam, optical machine is set on the mobile end of the sliding assembly, first position and second position are provided on the sliding assembly, the optical machine moves between first position and second position, light waveguide is used to receive image beam, and image beam is coupled out, when the optical machine is in first position, the image beam is directly shot into human eye, when the optical machine is in second position, the optical machine and the light waveguide correspond, the image beam is coupled into the light waveguide, and from the light waveguide inside emission to human eye, the utility model has the switching of the two display modes that can be realized, so that user can different scene requirement flexible selection display mode, to adapt to multi-scenario demand, display is more flexible, can reach the effect of balance between experience priority and privacy priority.

Description

Technical Field

[0001] This utility model relates to the technical field of AR display, and in particular to a display device and AR glasses. Background Technology

[0002] With the development of wearable devices, smart glasses are gradually becoming a new type of terminal that integrates display technology, sensing systems, and human-computer interaction. Among them, near-eye display, as one of the core functions of smart glasses, directly determines the user experience and system integration capabilities of the terminal.

[0003] Current near-eye display technologies include freeform surface reflective optics, optical waveguides, Birdbath optical structures, and direct-viewing optical mechanisms. The direct-viewing optical mechanism primarily places a micro-projection device on the edge of the eyeglass frame, directly projecting the image onto the eye's imaging area, thus achieving a lightweight and highly private display system. However, this method results in a small eyebox area, requiring the user's eyes to be in a precise position to receive the image, necessitating deliberate adjustment of the viewing angle and limiting the natural wearing experience. Limited by the output range and projection path length of the micro-projection device, the image viewing angle is narrow, distortion control is difficult, and it's hard to present an immersive picture. Since it only supports unidirectional projection, it cannot coordinate with active sensing / feedback systems, limiting more complex augmented reality interactive experiences and resulting in a poor user experience. The optical waveguide method places the micro-projection device at the waveguide coupling area of ​​a corresponding optical waveguide, allowing light to couple from the coupling area into the waveguide. After being extended by the waveguide, light travels from a specific area of ​​the lens to the eye's imaging area, achieving a larger eyebox and a better viewing experience, but it suffers from poor privacy.

[0004] The aforementioned near-eye display technologies all have a single fixed optical path structure, which lacks flexibility, makes it difficult to adapt to the needs of multiple scenarios, and makes it difficult to balance the priorities of user experience and privacy. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a display device and AR glasses to solve the technical problems of the prior art, such as lack of flexibility, difficulty in adapting to the needs of multiple scenarios, and difficulty in balancing the priorities of user experience and privacy.

[0006] This utility model provides a display device, comprising: Optical engine, used to emit beams of light for images; A sliding component, wherein the optical engine is disposed on the movable end of the sliding component, and the sliding component has a first position and a second position preset thereon, and the optical engine moves between the first position and the second position; An optical waveguide is used to receive an image beam and couple the image beam out. When the optical engine is in the first position, the image beam is directly incident into the human eye. When the optical engine is in the second position, the optical engine and the optical waveguide correspond, the image beam is coupled into the optical waveguide, and is incident into the human eye through the optical waveguide.

[0007] Optionally, the sliding assembly includes a slide rail, the optomechanism is disposed on the slide rail and slides along the length direction of the slide rail, and the optomechanism is located between the slide rail and the optical waveguide.

[0008] Optionally, it also includes a sliding control component, which controls the optical engine to be fixed on the slide rail when the optical engine is in the first position or the second position.

[0009] Optionally, the optical waveguide is configured as a diffractive optical waveguide or an arrayed optical waveguide.

[0010] Optionally, the optical waveguide is configured as a monocular waveguide or a binocular waveguide.

[0011] Optionally, the optical waveguide includes: Waveguide substrate; An image coupling region is disposed on the waveguide substrate. When the optomechanic is in the second position, the optomechanic is aligned with the image coupling region, and the image coupling region is used to receive the image beam emitted by the optomechanic. An image emission region is disposed on the waveguide substrate and is used to emit an image beam from the waveguide substrate to the human eye.

[0012] Optionally, the optical waveguide further includes a turning region disposed on the waveguide substrate, wherein the image beam received by the image coupling region is transmitted to the image emission region after pupil dilation through the turning region.

[0013] Optionally, the slide rail extends along a first direction. When the optical engine is in the first position, the optical engine is disengaged from the optical waveguide. When the optical engine is in the second position, the optical engine is aligned with the image coupling region of the optical waveguide.

[0014] Optionally, it also includes a frame, the slide rail being disposed within the frame and extending along a second direction, the frame having a notch, when the optical engine is in a first position, the optical engine is aligned with the notch, allowing the human eye to directly receive the image beam emitted by the optical engine, when the optical engine is in a second position, the optical engine is aligned with the image coupling region.

[0015] This utility model also provides AR glasses, which include the aforementioned display device.

[0016] The technical solution of this utility model has the following advantages: The display device provided by this utility model integrates two display modes—direct-view optical engine display and optical waveguide display—into a single display device. By setting a sliding component with a first position and a second position, the optical engine can move between the first and second positions under the action of the sliding component. In scenarios where a large visual coverage is not required but high image privacy is demanded, the optical engine can be slid along the sliding component until it reaches the first position. At this point, the optical engine is not obstructed by the optical waveguide, and the image beam emitted by the optical engine can be directly projected onto the human eye, thus ensuring that the image is not leaked and providing high privacy. When a larger eyebox and higher display are required... In scenarios requiring higher display quality or a wider field of view, the optical engine is slid along the sliding component again until it reaches the second position. At this point, the optical engine is directly facing the waveguide. The image beam emitted by the optical engine is coupled into the waveguide and propagates through it before exiting to the user's eye, forming a larger eyebox image. Users can see the complete image without precise alignment, resulting in a more comfortable and natural viewing experience and enhanced visual effects. By setting the sliding component, the two display modes can be switched, allowing users to flexibly choose the display mode according to different scenario needs. This adapts to multiple scenario requirements, making the display more flexible and achieving a balance between prioritizing user experience and privacy. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the display device in this utility model; Figure 2 This is a schematic diagram of the display device in this utility model from another perspective; Figure 3 This is a diagram of the image beam path of the optical engine at the first position in this utility model; Figure 4 This is a diagram of the image beam path of the optomechanical system at the second position in this invention; Figure 5 This is a schematic diagram of another embodiment of the sliding component in this utility model; Figure 6 This is a structural schematic diagram from another perspective of another embodiment of the sliding component in this utility model.

[0019] Explanation of reference numerals in the attached figures: 1. Optical mechanism; 2. Sliding component; 3. Optical waveguide; 31. Waveguide substrate; 32. Image coupling region; 33. Image emission region; 34. Turning region; 4. Notch. Detailed Implementation

[0020] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Unless otherwise explicitly specified and limited, the terms "setup," "installation," and "connection" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms based on the specific circumstances.

[0022] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0024] In the diagram, the direction indicated by arrow Y is the first direction, and the direction indicated by arrow X is the second direction.

[0025] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0026] Example 1 Reference Figures 1-6As shown, this utility model provides a display device, including an optical engine 1, a sliding component 2, and an optical waveguide 3. The optical engine 1 is used to emit an image beam and generate and emit the image beam. The optical engine 1 can be configured as a micro-projection module and can adopt micro-display technologies such as Micro-LED, LCoS, and LBS, and is equipped with collimating optical elements to achieve stable projection. The sliding component 2 is disposed inside the frame of the AR glasses or on the side wall of the frame, while the optical engine 1 is disposed on the moving end of the sliding component 2. The sliding component 2 has a first position and a second position preset. Since the optical engine 1 is disposed on the moving end of the sliding component 2, the sliding component 2 can guide the optical engine 1 to move between the preset first position and the second position. The optical waveguide 3 is used to receive the image beam and then couple the image beam out after propagating inside the optical waveguide 3.

[0027] When the optical engine 1 is in the first position, it moves to an area where it is not blocked by the optical waveguide 3. The image beam emitted by the optical engine 1 can directly enter the human eye. When the optical engine 1 moves to the second position, it corresponds to the optical waveguide 3. The optical engine 1 is blocked by the optical waveguide 3. The image beam emitted by the optical engine 1 is aligned with the optical waveguide 3, coupled into the optical waveguide 3, and propagated out through the optical waveguide 3 to reach the human eye.

[0028] The two modes of direct-view optical engine 1 display and optical waveguide 3 are integrated into a single display device, and by setting a sliding component 2 with a first position and a second position, the optical engine 1 can move between the first position and the second position under the action of the sliding component 2.

[0029] In scenarios where a large visual coverage is not required but image privacy is highly demanded, such as reading personal notifications, receiving confidential reminders, or viewing text messages, the optical engine 1 is slid on the sliding component 2 until it reaches the first position. At this point, there is no obstruction between the optical engine 1 and the human eye by the optical waveguide 3, and the image beam emitted by the optical engine 1 can be directly projected onto the human eye, thereby ensuring that the image is not leaked and has a high degree of privacy. In scenarios requiring a larger eyebox, higher display quality, or a wider field of view, such as navigation guidance, AR content browsing, remote collaboration, conference captions, and real-time translation, the optical engine 1 slides on the sliding component 2 until it reaches the second position. At this point, the optical engine 1 is directly facing the optical waveguide 3. The image beam emitted by the optical engine 1 is coupled into the optical waveguide 3, propagates within the waveguide 3, and then exits to the human eye, forming a larger eyebox image. Users can see the complete image without precise alignment, achieving a more comfortable and natural viewing experience and enhancing visual effects. By setting the sliding component 2, two display modes can be switched, allowing users to flexibly choose the display mode according to different scenario needs, thus adapting to multiple scenario requirements and making the display more flexible. It can achieve a balance between prioritizing user experience and prioritizing privacy.

[0030] As one specific implementation method, refer to Figure 1-2 As shown, the sliding component 2 includes a slide rail, and the optical engine 1 is mounted on the moving end of the slide rail. The optical engine 1 is located between the slide rail and the optical waveguide 3 and faces the optical waveguide 3. The human eye is located on the side of the optical waveguide 3 facing away from the optical engine 1. The optical engine 1 can slide along the length of the slide rail, thereby moving back and forth between the first position and the second position. When the optical engine 1 is in the first position, there is no obstruction from the optical waveguide 3, and the human eye can directly receive the image beam emitted by the optical engine 1. When the optical engine 1 is in the second position, the optical engine 1 is aligned with the optical waveguide 3, and the image beam emitted by the optical engine 1 can be coupled into the optical waveguide 3 and propagated through the optical waveguide 3 before being emitted to the human eye. The movement of the optical engine 1 is achieved by the physical displacement of the slide rail, which is simple in structure, lightweight, easy to manufacture, and convenient for large-scale integration and deployment.

[0031] Specifically, the slide rail is a mature and precise linear guide mechanism that ensures that the optical engine 1 performs precise and stable reciprocating linear motion between the first and second positions, ensuring that the optical path can be accurately aligned after each switch. By placing the optical engine 1 between the slide rail and the optical waveguide 3, the volume and thickness of the entire display device are reduced to the minimum. This is crucial for AR glasses with extremely limited space and helps to achieve lightweight and miniaturized devices.

[0032] As one specific implementation method, refer to Figure 3 and Figure 4 As shown, the optical waveguide 3 is configured as a diffractive optical waveguide 3 or an arrayed optical waveguide 3. The optical waveguide 3 can be configured as a monocular waveguide or a binocular waveguide. In this embodiment, the optical waveguide 3 is a diffractive optical waveguide 3.

[0033] Specifically, the optical waveguide 3 includes a waveguide substrate 31, an image coupling region 32, and an image emission region 33. The waveguide substrate 31 is configured as an eyeglass lens, and the image coupling region 32 is disposed on the waveguide substrate 31. When the optical engine 1 is in the second position, the optical engine 1 is aligned with the image coupling region 32. The image coupling region 32 can be used to receive the image beam emitted by the optical engine 1. The image beam emitted by the optical engine 1 can be efficiently captured and coupled into the optical waveguide 3 at a specific angle. The image emission region 33 is disposed on the waveguide substrate 31 and is used to emit the image beam from the waveguide substrate 31 to the human eye. Through the configuration of the image coupling region 32 and the image emission region 33 in the optical waveguide 3, the image beam emitted by the optical engine 1 can be coupled into the waveguide substrate 31 and, after propagating within the waveguide substrate 31, emitted from the image emission region 33 to the human eye, thereby achieving a larger eyebox and a better viewing experience.

[0034] Furthermore, the optical waveguide 3 also includes a transition region 34, which is disposed on the waveguide substrate 31. The image beam received by the image coupling region 32 is transmitted to the image emission region 33 after pupil dilation through the transition region 34. When the image beam received by the image coupling region 32 is transmitted to the transition region 34, pupil dilation is performed under the action of the transition region 34, thereby increasing the area of ​​the emitted image. The image beam after passing through the transition region 34 is then transmitted to the image emission region 33, and a larger area of ​​image is emitted to the human eye through the image emission region 33, further improving the viewing experience.

[0035] As a further implementation method, refer to Figure 1 and Figure 2 As shown, the slide rail extends along a first direction, which is vertical in the figure. When the display device is worn at the user's eye level, the slide rail extends towards the ground. When the optical engine 1 is in the first position, it is detached from the optical waveguide 3. When the optical engine 1 is in the second position, it is aligned with the image coupling region 32 of the optical waveguide 3. By extending the slide rail along the first direction, the optical engine 1 can move linearly from the second position aligned with the image coupling region 32 to the first position completely away from the physical range of the optical waveguide 3. This prevents the image beam emitted by the optical engine 1 in the first position from interacting with the optical waveguide 3, and also reduces the size of the slide rail, thus minimizing the structural volume.

[0036] As another implementation method, refer to Figure 5 and Figure 6 As shown, it also includes a frame, with a sliding rail set inside the frame and extending along a second direction, which is horizontal in the figure. When the display device is worn on the eyes, the sliding rail extends horizontally to the ground. The frame has a notch 4. When the optical engine 1 is in the first position, it is aligned with the notch 4, allowing the eyes to directly receive the image beam emitted by the optical engine 1. When the optical engine 1 is in the second position, it is aligned with the image coupling area 32. By setting the notch 4 on the frame, a transparent channel without optical structure is provided for the optical engine 1 in the first position. At this time, the image beam emitted by the optical engine 1 can pass directly and unobstructed through the notch 4 and enter the eyes, achieving direct viewing display. This design integrates the sliding rail inside the frame, saving the space required to completely move the optical engine 1 out of the optical waveguide 3, making the structure of the display device more compact and smaller, which is conducive to the thin and light design of the display device. At the same time, the optical engine 1 does not protrude from the optical waveguide 3, thus making the appearance more aesthetically pleasing.

[0037] As another implementation, the display device also includes a sliding control component. When the optical engine 1 is in the first position or the second position, the sliding control component controls the optical engine 1 to be fixed on the slide rail. Specifically, the sliding control component can be configured as a magnetic structure or an electrically controlled sliding module. When configured as a magnetic structure, magnets are provided at both the first and second positions of the optical engine 1 and the slide rail. When the optical engine 1 moves to the first or second position, the magnet on the optical engine 1 will be magnetically connected to the magnet at the first or second position, thereby ensuring that the optical engine 1 remains stable at the first or second position. When the optical engine 1 needs to slide, it is only necessary to push the optical engine 1 with external force to disengage the magnet. The electrically controlled sliding module is connected to the optical engine 1 through other electrically controlled structures and pushes the optical engine 1 to slide on the slide rail. When the optical engine 1 is in the first or second position, the electrically controlled sliding module stops working, thereby keeping the optical engine 1 fixed at the first or second position. In other embodiments, the sliding control component can also be configured as a buckle, locking screw, or damping structure, as long as it can firmly lock the optical engine 1 when it reaches the first or second position, preventing the optical engine 1 from accidentally sliding under the movement of the user's head or external vibration, thereby ensuring the long-term stability and reliability of the optical path in both display modes and providing the user with a clear and stable visual experience.

[0038] Example 2 Reference Figures 1-6 As shown, this embodiment provides an AR glasses, including the display device in embodiment 1. By setting the sliding component 2, the two display modes can be switched, allowing users to flexibly select the display mode according to different scenario needs, thereby adapting to multiple scenario needs, making the display more flexible, and achieving a balance between prioritizing user experience and prioritizing privacy.

[0039] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0040] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A display device, characterized in that, include: Optical engine, used to emit beams of light for images; A sliding component, wherein the optical engine is disposed on the movable end of the sliding component, and the sliding component has a first position and a second position preset thereon, and the optical engine moves between the first position and the second position; An optical waveguide is used to receive an image beam and couple the image beam out. When the optical engine is in the first position, the image beam is directly incident into the human eye. When the optical engine is in the second position, the optical engine and the optical waveguide correspond, the image beam is coupled into the optical waveguide, and is incident into the human eye through the optical waveguide.

2. The display device as claimed in claim 1, characterized in that, The sliding assembly includes a slide rail, the optomechanic is disposed on the slide rail and slides along the length of the slide rail, and the optomechanic is located between the slide rail and the optical waveguide.

3. The display device as claimed in claim 2, characterized in that, It also includes a sliding control component, which controls the optical engine to be fixed on the slide rail when the optical engine is in the first position or the second position.

4. The display device as claimed in claim 1, characterized in that, The optical waveguide is configured as a diffractive optical waveguide or an arrayed optical waveguide.

5. The display device as claimed in claim 1, characterized in that, The optical waveguide is configured as a monocular waveguide or a binocular waveguide.

6. The display device as claimed in claim 2, characterized in that, The optical waveguide includes: Waveguide substrate; An image coupling region is disposed on the waveguide substrate. When the optomechanic is in the second position, the optomechanic is aligned with the image coupling region, and the image coupling region is used to receive the image beam emitted by the optomechanic. An image emission region is disposed on the waveguide substrate and is used to emit an image beam from the waveguide substrate to the human eye.

7. The display device as claimed in claim 6, characterized in that, The optical waveguide also includes a turning region, which is disposed on the waveguide substrate. The image beam received by the image coupling region is transmitted to the image emission region after being dilated by the turning region.

8. The display device as claimed in claim 6, characterized in that, The slide rail extends along a first direction. When the optical engine is in the first position, the optical engine is detached from the optical waveguide. When the optical engine is in the second position, the optical engine is aligned with the image coupling region of the optical waveguide.

9. The display device as claimed in claim 6, characterized in that, It also includes a frame, the slide rail is disposed inside the frame and extends along a second direction, the frame is provided with a notch, when the optical engine is in the first position, the optical engine is aligned with the notch, so that the human eye can directly receive the image beam emitted by the optical engine, when the optical engine is in the second position, the optical engine is aligned with the image coupling area.

10. An AR glasses, characterized in that, Includes the display device according to any one of claims 1-9.

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