Near-to-eye display equipment

Abstract

The utility model relates to a near-to-eye display device which comprises a mirror frame, a display module and a middle beam, the display module is installed on the mirror frame and connected with the middle beam, the middle beam is provided with first installation hole sites, the first installation hole sites at least comprise a first hole site and a second hole site which are distributed in the first direction, and when the display module is installed in the first hole site, the display module is located at a first gear; when the display module is mounted in the second hole position, the display module is located at the second gear, so that the adjustable range of the optical axis spacing of the near-to-eye display equipment is expanded, and the applicable crowd of the near-to-eye display equipment is expanded. Besides, the mounting position of the display module is adjusted by replacing the locking position of the fastener, so that the adjustment of the optical axis distance is realized, the complexity of the optical axis distance adjusting structure is reduced, the structures of the display module and the middle beam are simplified, the sizes of the display module, the middle beam and the near-to-eye display equipment are reduced, and the display efficiency is improved. Therefore, the miniaturization and lightweight design of the near-to-eye display equipment can be realized.

Description

Technical Field

[0001] This application relates to the technical field of head-mounted intelligent devices, and particularly to a near-eye display device. Background Art

[0002] A near-eye display device is used to transmit virtual information such as graphics, numbers, and icons in the form of light to the eyes of a wearer, so that the virtual information is imaged in front of the wearer's eyes. The near-eye display device includes a first display module and a second display module. The first display module and the second display module respectively correspond to the left and right eyes of the wearer. When the optical axis of the first display module is directly opposite to the left eye and the optical axis of the second display module is directly opposite to the right eye, the virtual information seen by the wearer is the clearest. When the left and right eyes deviate from the optical axis, the virtual information seen by the wearer will gradually become blurred or even the wearer cannot see the virtual information. Therefore, when the pupil distance of the wearer matches the optical axis spacing of the first display module and the second display module, the wearer can see a clear and complete virtual information image, that is, the optical axis spacing of the first display module and the second display module determines the applicable population of the near-eye display device.

[0003] In order to increase the range of applicable population of the near-eye display device, the usable population of the near-eye display device can be increased by increasing the eye box size. However, increasing the eye box size means that light needs to be collected and focused into the eyes of the wearer from a wider angle, thus requiring a larger and more complex optical lens module, that is, resulting in a larger overall size and thickness of the display module, which is not conducive to the miniaturization and lightweight development of the near-eye display device. At the same time, relying solely on expanding the eye box size to be compatible with the pupil distances of different populations still has certain limitations and cannot be compatible with a wide enough range of populations, and there are still many wearers who have problems such as unclear vision and blurred edges.

[0004] Under the premise of increasing the range of applicable population of the near-eye display device, how to reduce the size and weight of the device is an important problem urgently to be solved in this field. Utility Model Content

[0005] In view of this, this application provides a near-eye display device, which can be compatible with a wider range of populations and can also reduce the size and weight of the device.

[0006] This application provides a near-eye display device, including a frame, a display module, and a middle beam. The display module is installed on the frame and connected to the middle beam. The middle beam is provided with a first mounting hole position, and the first mounting hole position at least includes a first hole and a second hole distributed along a first direction. When the display module is installed in the first hole, the display module is in a first gear position. When the display module is installed in the second hole, the display module is in a second gear position.

[0007] In this application, the display module has at least two adjustable gears, which improves the adjustable range of the optical axis spacing of the near-eye display device, so as to expand the applicable population of the near-eye display device. In addition, by changing the locking position of the fastener, the installation position of the display module is adjusted, thereby realizing the adjustment of the optical axis spacing, reducing the complexity of the optical axis spacing adjustment structure, simplifying the structures of the display module and the middle beam, and thus facilitating the reduction of the sizes of the display module, the middle beam and the near-eye display device, so as to facilitate the miniaturization and lightweight design of the near-eye display device.

[0008] In a possible design, the display module includes a first display module and a second display module distributed along a first direction; the middle beam includes a first beam body and a second beam body distributed along the first direction. A first mounting hole is provided on the first beam body, and the first display module is mounted in the first mounting hole. A second mounting hole is provided on the second beam body, and the second display module is mounted in the second mounting hole; the number of the second mounting holes in the first direction is at least one.

[0009] In this application, the near-eye display device can be a single-sided adjustment structure or a double-sided adjustment structure. When the near-eye display device is a single-sided adjustment structure, the wearer only needs to adjust the installation position of the first display module to realize the adjustment of the optical axis spacing, which is beneficial to simplifying the operation of the wearer to adjust the optical axis spacing and further simplifies the adjustment difficulty of the wearer; when the near-eye display device is a double-sided adjustment structure, the distance between the first display module and the second display module can be further increased, thereby further improving the adjustable range of the optical axis spacing of the near-eye display device.

[0010] In a possible design, the middle beam is provided with a limiting groove; the display module is provided with a first extension part, the first extension part extends along the distribution direction of the display module and the middle beam, and at least part of the first extension part is located in the limiting groove. In the first direction, the first extension part can abut against the side wall of the limiting groove to limit the moving distance of the display module in the first direction.

[0011] In this application, the first extension part can abut against the side wall of the limiting groove in the first direction to limit the moving distance of the display module in the first direction, thereby reducing the risk that the display module moves a large distance and contacts the spectacle frame, resulting in damage to the spectacle frame or the display module.

[0012] In a possible design, along a second direction, the first extension parts are oppositely arranged on both sides of the display module; in the second direction, the first extension parts abut against the side walls of the limiting groove to limit the movement of the display module relative to the middle beam in the second direction.

[0013] In the present application, the first extension portion can clamp the middle beam in the second direction to limit the movement of the display module in the second direction, thereby reducing the risk of abnormal binocular optical axis fusion of the wearer caused by different distances between the display module and the left and right eyes of the wearer.

[0014] In a possible design, on the side of the first extension portion facing away from the display module in the extending direction of the first extension portion, a second extension portion is connected. The second extension portion and the first extension portion are connected to form a V-shaped or L-shaped structure; in the third direction, the second extension portion abuts against the middle beam to limit the movement of the display module relative to the middle beam in the third direction.

[0015] In the present application, the first extension portion can clamp the middle beam in the second direction, and the housing and the second extension portion clamp the middle beam in the third direction, reducing the risk of the display module swinging in a direction perpendicular to the first direction. Thereby reducing the risk that there is an angle or even a large angle between the optical axes of the first display module and the second display module, and further reducing the risk of unclear virtual information imaging of the near-eye display device or even abnormal binocular optical axis fusion of the wearer, improving the reliability of virtual information transmission and the accuracy of imaging of the near-eye display device, so as to improve the use experience of the wearer.

[0016] In a possible design, the middle beam further includes a third beam body. The two ends of the third beam body are respectively connected to the first beam body and the second beam body; the third beam body is provided with a third mounting hole position and a fourth mounting hole position. The first beam body is mounted at the third mounting hole position through a fastener, and the second beam body is mounted at the fourth mounting hole position through a fastener.

[0017] In the present application, the first beam body and the third beam body, and the second beam body and the third beam body are fixedly connected through fasteners, which is convenient for the installation and disassembly of the first beam body, the second beam body and the third beam body, and reduces the difficulty of installation and disassembly of the middle beam.

[0018] In a possible design, in the first direction, the number of the third mounting hole positions is at least two; and / or, in the first direction, the number of the fourth mounting hole positions is at least two.

[0019] In the present application, the first beam body has at least two adjustable mounting positions, and / or the second beam body has at least two adjustable mounting positions. The adjustable mounting positions of the first beam body and / or the second beam body can further increase the adjustable range of the optical axis spacing of the near-eye display device, thereby further expanding the applicable population of the near-eye display device.

[0020] In a possible design, the third beam body is provided with a mounting groove. A part of the first beam body is located in the mounting groove and abuts against the side wall of the mounting groove, and a part of the second beam body is located in the mounting groove and abuts against the side wall of the mounting groove.

[0021] In the present application, during the process of adjusting the installation positions of the first beam body and the second beam body, the first beam body and the second beam body can move along the installation groove, reducing the risk that the first beam body and the second beam body deviate during the movement, resulting in difficult installation or even impossible installation.

[0022] In a possible design, the near-eye display device includes a flexible circuit board. The flexible circuit board includes a first connection portion, a second connection portion, and a third connection portion. The first connection portion is connected to the first display module, the third connection portion is connected to the second display module, and both ends of the second connection portion are respectively connected to the first connection portion and the third connection portion; a redundant portion is provided on the second connection portion.

[0023] In the present application, during the process of adjusting the optical axis distance between the first display module and the second display module, the redundant portion can be straightened or bent, so that the second connection portion has a certain deformation margin, thereby reducing the risk of the flexible circuit board being broken, and further improving the working stability of the flexible circuit board and the near-eye display device and extending the service life.

[0024] In a possible design, the near-eye display device further includes a knob. One end of the knob is connected to the display module, and the other end of the knob extends outside the frame and is exposed. The knob is used to adjust the focal length of the display module.

[0025] In the present application, the knob is used to adjust the focal length of the optical lens module, so that wearers with different visual acuities can all see clear information images, so that the near-eye display device can cover people with different myopia degrees, and the near-eye display device can be compatible with a wider range of people. Among them, the specific structure and method for adjusting the focal length are not particularly limited in the embodiments of the present application.

[0026] In a possible design, the knob includes a head and a rod body. The frame is provided with a groove body. At least part of the head is located and exposed in the groove body. The groove body is provided with a hole. One end of the rod body is connected to the head, and the other end of the rod body extends into the frame through the hole and is connected to the display module; the near-eye display device further includes a second seal, and the second seal is sleeved on the rod body, and the second seal is used to block the hole.

[0027] In the present application, the second seal is used to block the exposed hole to improve the sealing performance between the knob and the frame, which is beneficial to improving the waterproof and dustproof performance of the near-eye display device.

[0028] In a possible design, the near-eye display device further includes a first seal, and the first seal is located between the display module and the frame, and the first seal is used to seal the gap between the display module and the frame.

[0029] In the present application, when adjusting the gear of the display module, the gap between the display module and the spectacle frame increases. The first seal can recover from deformation under the action of its own resilience, so as to refill the gap between the sealed display module and the spectacle frame again, thereby improving the sealing performance between the display module and the spectacle frame, which is beneficial to improving the waterproof and dustproof performance of the near-eye display device.

[0030] In a possible design, the near-eye display device further includes a sensor and a control module, and the sensor is electrically connected or signal-connected to the control module; the sensor is a position sensor for detecting the position of the display module, or the sensor is a distance sensor for detecting the distance change value of the display module; the control module is used to adjust the display parameters of the near-eye display device according to the detection result of the sensor.

[0031] In the present application, the control module adjusts the display parameters of the virtual information of the near-eye display device according to the actual value of the optical axis spacing, so that wearers with different pupil distance parameters have a consistent viewing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 It is a schematic diagram of a partial structure of the near-eye display device in one embodiment;

[0034] Figure 2 It is a schematic diagram of the optical principle of the display module in one embodiment;

[0035] Figure 3 It is a schematic diagram of the optical principle of the display module in another embodiment;

[0036] Figure 4 It is a schematic diagram of the structure of the display module in one embodiment;

[0037] Figure 5 It is a schematic diagram of the connection structure of the display module in the near-eye display device in one embodiment;

[0038] Figure 6 It is a schematic diagram of the connection structure of the display module in the near-eye display device provided by the present application in one embodiment;

[0039] Figure 7 It is a schematic diagram of the structure of the near-eye display device provided by the present application when it is in the first gear;

[0040] Figure 8 Schematic diagram of the structure of the near-eye display device provided by this application when it is in the second gear;

[0041] Figure 9 Schematic diagram of the connection structure of the display module in the near-eye display device provided by this application in another embodiment;

[0042] Figure 10 Schematic diagram of the structure of the middle beam provided by this application in one embodiment;

[0043] Figure 11 Partial structure schematic diagram of the middle beam provided by this application in another embodiment;

[0044] Figure 12 Partial structure schematic diagram of the middle beam provided by this application in yet another embodiment;

[0045] Figure 13 Partial structure schematic diagram of the display module in the near-eye display device provided by this application in yet another embodiment;

[0046] Figure 14 Partial structure schematic diagram of the display module in the near-eye display device provided by this application in yet another embodiment;

[0047] Figure 15 Partial structure cross-sectional view of the display module in the near-eye display device provided by this application when it is in the first gear;

[0048] Figure 16 Partial structure cross-sectional view of the display module in the near-eye display device provided by this application when it is in the second gear;

[0049] Figure 17 Partial structure schematic diagram of the near-eye display device provided by this application in one embodiment;

[0050] Figure 18 Schematic diagram of the connection structure of the display module in the near-eye display device provided by this application in yet another embodiment;

[0051] Figure 19 For Figure 18 Schematic diagram of the flexible circuit board in;

[0052] Figure 20 Partial structure schematic diagram of the near-eye display device provided by this application in yet another embodiment;

[0053] Figure 21 For Figure 20 Schematic diagram of the knob in;

[0054] Figure 22 ForFigure 20 Partial structural schematic diagram of the middle frame

[0055] Figure 23 Structural cross-sectional view of the second seal provided by the present application

[0056] Reference numerals

[0057] 01 - Eye

[0058] 02 - Eye box

[0059] 021 - First eye box

[0060] 022 - Second eye box

[0061] 1 - Frame

[0062] 11 - Frame body

[0063] 12 - Temple

[0064] 13 - Operation hole

[0065] 14 - Groove body

[0066] 15 - Duct

[0067] 2 - Display module

[0068] 21 - Optical engine

[0069] 22 - Optical lens module

[0070] 23 - Light guide

[0071] 24 - Outer shell

[0072] 241 - First extension part

[0073] 242 - Second extension part

[0074] 25' - First module

[0075] 251' - First optical axis

[0076] 26' - Second module

[0077] 261' - Second optical axis

[0078] 25 - First display module

[0079] 26 - Second display module

[0080] 3 - Center beam

[0081] 31 - First mounting hole position

[0082] 311 - First hole position

[0083] 312 - Second hole position;

[0084] 32 - First beam body;

[0085] 33 - Second beam body;

[0086] 34 - Third beam body;

[0087] 341 - Third installation hole position;

[0088] 342 - Fourth installation hole position;

[0089] 343 - Installation groove;

[0090] 35 - Limit groove;

[0091] 36 - Second installation hole position;

[0092] 361 - Third hole position;

[0093] 362 - Second hole position;

[0094] 4 - First seal;

[0095] 5 - Flexible circuit board;

[0096] 51 - First connection part;

[0097] 52 - Second connection part;

[0098] 521 - Redundant part;

[0099] 53 - Third connection part;

[0100] 6 - Knob;

[0101] 61 - Head;

[0102] 62 - Shaft body;

[0103] 63 - Second seal;

[0104] 631 - First colloid;

[0105] 632 - Second colloid. Detailed implementation manners

[0106] For a better understanding of the technical solutions of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0107] It should be clear that the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without making creative efforts belong to the scope of protection of this application.

[0108] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0109] It should be understood that the term "and / or" used herein is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0110] The embodiments of the present application provide a near-eye display device. The near-eye display device includes, but is not limited to, head-mounted intelligent devices with near-eye display functions such as augmented reality (AR) glasses, AR helmets, virtual reality (VR) glasses, or VR helmets. Taking the AR glasses as an example of the near-eye display device, Figure 1 is a schematic structural diagram of the AR glasses, as Figure 1 shown, the near-eye display device includes a first direction X, a second direction Y, and a third direction Z. Taking the case when the near-eye display device is worn as an example, the first direction X is parallel to the left-right direction of the wearer, the second direction Y is parallel to the front-back direction of the wearer, and the third direction Z is parallel to the up-down direction of the wearer.

[0111] As Figure 1 shown, the near-eye display device includes a frame 1. The frame 1 includes a frame body 11 and temple arms 12 disposed on both sides of the frame body 11 along the first direction X. The near-eye display device further includes a display module 2 mounted on the frame 1. The display module 2 includes an optical engine and an optical lens module for imaging virtual information in front of the eyes 01 of the wearer.

[0112] Figure 2 is a schematic diagram of the optical principle of the display module in one embodiment, as Figure 2As shown, the display module 2 includes an optical engine 21 and an optical lens module 22. The optical engine 21 is configured to emit virtual information such as numbers, patterns, texts, colors, etc. in the form of light to the optical lens module 22. After the optical lens module 22 performs multiple operations such as refraction, transmission, and reflection on the light, the light is finally output along its optical axis to the eyes 01 of the wearer, thereby enabling the wearer to receive the virtual information. The light output by the optical lens module 22 will coincide with the optical axis of the display module 2, that is, the position and direction of the light output by the optical lens module 22 represent the position and direction of the optical axis, and also represent the transmission route of the light transmitted from the optical lens module 22 to the eyes 01 of the wearer. The display module also includes an eyebox 02. When the eyes 01 of the wearer are aligned with the optical axis, a conical area between the eyes 01 and the display module 2 is the eyebox 02. At this time, the eyes 01 of the wearer are located at the center of the eyebox 02, and the virtual information seen by the wearer is the clearest. When the eyes 01 of the wearer deviate from the optical axis, within the range of the eyebox, as the deviation distance gradually increases, the virtual information seen by the wearer will become increasingly blurred. When the eyes leave the range of the eyebox 02, the wearer cannot see the virtual information.

[0113] Refer again to Figure 1 , the optical lens module 22 is mounted on the frame 11, and at least a part of the optical lens module 22 is exposed and faces the eyes 01 of the wearer in the second direction Y, so as to facilitate the wearer to receive virtual information. Figure 2 The optical engine 21 in

[0114] can be mounted on the temple 12 or on the frame 11. Figure 2 As shown in Figure 1 , when the optical engine 21 is mounted on the temple, a light guide member 23 can be provided between the optical engine 21 and the optical lens module 22. The light guide member 23 can be mounted on the frame 11 in Figure 2 or on the temple 12. The light guide member 23 is used to change the propagation direction of the light, so as to guide the light emitted by the optical engine 21 into the optical lens module 22. Among them, the light guide member 23 can be a reflecting mirror or an optical waveguide structure.

[0115] Taking the light guide member 23 as a reflecting mirror as an example. When the optical engine 21 is mounted on the temple 11, it can increase the flexibility of the mounting position of the optical engine 21, which is beneficial to reducing the size at the frame, and thus beneficial to realizing the miniaturization and lightweight design of the overall near-eye display device.

[0115] When the optical engine 21 is mounted on the frame 12, as shown in Figure 3 Figure 3The figure is a schematic diagram of the optical principle of the display module in another embodiment. At this time, the light emitted by the optical engine 21 directly enters the optical lens module 22, and then is transmitted by the optical lens module 22 to the eyes 01 of the wearer, reducing the loss caused by transmission during the light propagation process, thereby facilitating the improvement of the accuracy and reliability of the information transmission of the optical lens module.

[0116] Figure 4 The figure is a schematic structural diagram of the display module. As Figure 4 shown, the display module 2 further includes a housing 24. The optical engine 21 and the optical lens module 22 mentioned above are both installed on the housing 24. The housing 24 is fixedly connected to the Figure 1 frame 11 in, and at least part of the optical lens module 22 is exposed. Installing the optical engine 21 and the optical lens module 22 on the same housing 24 can improve the accuracy of the relative positions of the optical engine and the optical lens module 22 during use and transportation, thereby improving the accuracy and reliability of the optical signal transmission between the optical engine and the optical lens module, and further improving the working stability of the near-eye display device.

[0117] Based on Figure 4 the display module 2 shown, Figure 5 The figure is a schematic diagram of the connection structure of the display module in an embodiment of the near-eye display device. As Figure 5 shown, in the near-eye display device, usually two display modules are provided. The two display modules are respectively denoted as the first module 25' and the second module 26'. That is, the near-eye display device includes the first module 25' and the second module 26' distributed along the first direction X. The first module 25' includes a first optical axis 251' and a first eye box 021, and the second module 26' includes a second optical axis 261' and a second eye box 022. The virtual information will be output along the first optical axis 251' and the second optical axis 261' and enter the eyes 01 of the wearer. When the left and right eyes of the wearer are respectively located within the areas of the first eye box 021 and the second eye box 022, the wearer can receive relatively clear virtual information. When the left and right eyes of the wearer are respectively aligned with the first optical axis 251' and the second optical axis 261', that is, the left and right eyes are respectively located at the centers of the first eye box 021 and the second eye box 022, at this time the virtual information received by the wearer is the clearest.

[0118] Due to the differences in the interpupillary distance among different groups of people. For example, adults have a larger interpupillary distance, while minors have a smaller one. Therefore, when people with different interpupillary distances wear it, the clarity of the virtual information they see is different. To improve the consistency of clarity, the usable population of the near-eye display device can be increased by increasing the sizes of the first eye box 021 and the second eye box 022. However, increasing the sizes of the first eye box 021 and the second eye box 022 means that light needs to be collected and focused into the wearer's eyes from a wider angle, thus requiring a larger and more complex optical lens module, that is, resulting in a larger overall size and thickness of the first module 25' and the second module 26', which is not conducive to the miniaturization and lightweight development of the near-eye display device. At the same time, relying solely on expanding the eye box size to accommodate the interpupillary distances of different people still has certain limitations and cannot accommodate a wide enough range of people. There are still many wearers who experience unclear vision, blurred edges, etc.

[0119] To increase the distance between the first optical axis 251' and the second optical axis 261', mechanical structures such as motors and gears are usually used to drive the first module 25' and the second module 26' to move, and the optical parameters of the near-eye display device are adjusted by changing the distance between the first module 25' and the second module 26'. For example, the optical axis spacing between the first module 25' and the second module 26' is adjusted, so that the optical axis spacing of the near-eye display device can be adjusted according to the interpupillary distance of different wearers. For example, mechanical structures such as motors, gears, and racks are arranged on the near-eye display device. The motor drives the gear to rotate, and the rotation of the gear drives the rack to move, thereby realizing the left-right movement of the first module 25' and the second module 26', and finally realizing the adjustment of the optical axis spacing between the first module 25' and the second module 26'. However, this adjustment structure will cause a significant increase in the overall size of the near-eye display device, posing a great challenge to the thin and light of the whole machine.

[0120] In view of this, the embodiment of the present application provides a near-eye display device to solve the above technical problems.

[0121] Figure 6 It is a partial structural schematic diagram of the display module in an embodiment. As Figure 6 shown, the near-eye display device includes a display module 2 and a middle beam 3. The middle beam 3 extends along the first direction X, and on both sides of the middle beam 3 in the first direction X, a display module 2 is connected. The two display modules 2 are respectively denoted as the first display module 25 and the second display module 26. The first display module 25 and the second display module 26 are respectively used to transmit virtual information to the left and right eyes of the wearer.

[0122] As Figure 6As shown, a first mounting hole position 31 and a second mounting hole position 36 may be provided on the middle beam 3. The first display module 25 is fixed at the first mounting hole position 31 through a fastener, and the second display module 26 is fixed at the second mounting hole position 36 through a fastener. The fastener includes but is not limited to screws, bolts, etc. Among them, the first mounting hole position 31 may at least include a first hole position 311 and a second hole position 312 that are spaced apart along the first direction X. When the first display module 25 is fixed at the first hole position 311, the first display module 25 is in the first gear position. When the first display module 25 is fixed at the second hole position 312, the first display module 25 is in the second gear position.

[0123] Figure 7 It is a schematic structural diagram of the near-eye display device in the first gear position. Figure 8 It is a schematic structural diagram of the near-eye display device in the second gear position. In the embodiments of the present application, the display module has at least an adjustable first gear position and a second gear position. When the display module switches between the first gear position and the second gear position, it is possible to facilitate the adjustment of the optical parameters of the near-eye display device. Taking the optical axis spacing between the first display module and the second display module as an example of the optical parameters of the near-eye display device, when the near-eye display device is in the first gear position, as Figure 7 shown, the optical axis spacing L between the first display module 25 and the second display module 26 is relatively large, so that wearers with a relatively large pupil distance can see a clear virtual information image. The wearer can also adjust the optical axis spacing by controlling the installation position of the first display module 25 on the middle beam 3, so that the near-eye display device switches to the second gear position. When the near-eye display device is in the second gear position, as Figure 8 shown, the optical axis spacing L between the first display module 25 and the second display module 26 becomes smaller, so that wearers with a relatively small pupil distance can see a clear virtual information image. In this embodiment, the first display module 25 has at least two adjustable gear positions, which improves the adjustable range of the optical axis spacing of the near-eye display device to expand the applicable population of the near-eye display device. In addition, by changing the installation position of the fastener on the middle beam 3 to adjust the installation position of the first display module 25, the adjustment of the optical axis spacing between the first display module 25 and the second display module 26 is realized, reducing the complexity of the optical axis spacing adjustment structure, thereby simplifying the structures of the display module 2 and the middle beam 3, and further facilitating the reduction of the sizes of the display module 2, the middle beam 3, and the near-eye display device, so as to facilitate the miniaturization and lightweight design of the near-eye display device.

[0124] Among them, the near-eye display device may be a single-sided adjustment structure or a double-sided adjustment structure.

[0125] When the near-eye display device is a single-sided adjustment structure, as Figure 6As shown, along the first direction X, the middle beam 3 includes a first beam body 32 for connecting with the first display module 25 and a second beam body 33 for connecting with the second display module 26. At least two first mounting hole positions 31 spaced apart along the first direction X are provided at the first beam body 32. The two first mounting hole positions 31 are respectively denoted as the first hole position 311 and the second hole position 312, so that the first display module 25 has at least two adjustable mounting positions. A second mounting hole position 36 is provided at the second beam body 33, so that the mounting position of the second display module 26 is not adjustable.

[0126] In this embodiment, the near-eye display device has a single-sided adjustment structure, so that the wearer only needs to adjust the mounting position of the first display module 25 to achieve the adjustment of the optical axis spacing, which is beneficial to simplifying the operation of the wearer to adjust the optical axis spacing, and further simplifies the adjustment difficulty of the wearer.

[0127] When the near-eye display device has a double-sided adjustment structure, Figure 9 is a schematic structural diagram of the middle beam in an embodiment. As Figure 9 shown, at least two first mounting hole positions 31 are provided at the first beam body 32. Taking the two first mounting hole positions 31 spaced apart along the first direction X as an example, the two first mounting hole positions 31 are respectively denoted as the first hole position 311 and the second hole position 312, so that the first display module 25 has at least two adjustable mounting positions. At least two second mounting hole positions 36 are provided at the second beam body 33. Taking the two second mounting hole positions 36 spaced apart along the first direction X as an example, the two second mounting hole positions 36 are respectively denoted as the third hole position 361 and the fourth hole position 362, so that the second display module 26 has at least two adjustable mounting positions.

[0128] In this embodiment, the near-eye display device has a double-sided adjustment structure, so that the distance between the first display module 25 and the second display module 26 can be further increased, thereby further increasing the adjustable range of the optical axis spacing of the near-eye display device.

[0129] Specifically, as Figure 9 shown, the middle beam 3 further includes a third beam body 34. Along the first direction X, the two ends of the third beam body 34 are respectively connected to the first beam body 32 and the second beam body 33. In a possible design, as Figure 9 shown, the first beam body 32, the second beam body 33 and the third beam body 34 are integrally formed to improve the stability of the overall structure of the middle beam 3.

[0130] Figure 10 is a schematic structural diagram of the middle beam in an embodiment. As Figure 10As shown, in another possible design, the first beam body 32, the second beam body 33, and the third beam body 34 are separately arranged, and the first beam body 32 is fixedly connected to the third beam body 34, and the second beam body 33 is fixedly connected to the third beam body 34. The connection methods between the first beam body 32 and the third beam body 34, and between the second beam body 33 and the third beam body 34 include but are not limited to bonding, welding, riveting, fixed connection through fasteners, etc. Preferably, the first beam body 32 and the third beam body 34, and the second beam body 33 and the third beam body 34 are fixedly connected through fasteners, so as to facilitate the installation and disassembly of the first beam body 32, the second beam body 33, and the third beam body 34, and reduce the installation and disassembly difficulty of the middle beam 3.

[0131] When the first beam body 32, the second beam body 33, and the third beam body 34 are separately arranged, as Figure 10 shown, the third beam body 34 is provided with a third mounting hole position 341 and a fourth mounting hole position 342. The first beam body 32 is fixedly installed at the third mounting hole position 341 through a fastener, and the second beam body 33 is fixedly installed at the fourth mounting hole position 342 through a fastener.

[0132] In a possible design, as Figure 10 shown, the number of both the third mounting hole position 341 and the fourth mounting hole position 342 is one, that is, the installation positions of the first beam body 32 and the second beam body 33 on the third beam body 34 are not adjustable.

[0133] Figure 11 As a schematic structural diagram of the middle beam in an embodiment, as Figure 11 shown, in another possible design, at least two third mounting hole positions 341 are arranged at intervals along the first direction X, so that the first beam body 32 has at least two adjustable installation positions, and / or at least two fourth mounting hole positions 342 are arranged at intervals along the first direction X, so that the second beam body 33 has at least two adjustable installation positions. The adjustable installation positions of the first beam body 32 and / or the second beam body 33 can further increase the adjustable range of the optical axis spacing of the near-eye display device, thereby further expanding the applicable population of the near-eye display device.

[0134] Figure 12 As a schematic structural diagram of the middle beam in an embodiment, as Figure 12 shown, the third beam body 34 can be provided with an installation groove 343. A part of the first beam body 32 and a part of the second beam body 33 are inserted into the installation groove 343 and abut against the side wall of the installation groove 343. During the process of adjusting the installation positions of the first beam body 32 and the second beam body 33, the first beam body 32 and the second beam body 33 can move along the installation groove 343, reducing the risk that the first beam body 32 and the second beam body 33 deviate during the movement, resulting in difficult installation or even impossible installation.

[0135] Figure 13Schematic diagram of the connection structure between the display module and the middle beam in an embodiment, as Figure 13 shown, a first extension portion 241 is provided on the outer shell 24 of the display module 2, and a limiting groove 35 is provided on the middle beam 3. Specifically, the limiting groove 35 can be provided on two of the first beam body 32, the second beam body 33, and the third beam body 34. The first extension portion 241 extends along the distribution direction of the display module 2 and the middle beam 3 and extends into the limiting groove 35. For example, as Figure 13 shown, the first extension portion 241 extends along the third direction Z. When adjusting the installation position of the display module 2 in the first direction X, the first extension portion 241 can move within the limiting groove 35, and the first extension portion 241 can abut against the side wall of the limiting groove 35 in the first direction X to limit the moving distance of the display module 2 in the first direction X. At the same time, referring to Figure 1 , the risk that the display module 2 moves a large distance and contacts the frame 1, resulting in damage to the frame 1 or the display module 2, is reduced.

[0136] Among them, a buffer member (not marked in the figure) can be provided on the side wall of the first extension portion 241 and / or the limiting groove 35. In the first direction X, the first limiting portion 241 and the side wall of the limiting groove 35 can be indirectly contacted through the buffer member, so that the first limiting portion 241 is in flexible contact with the limiting groove 35, reducing the risk that the first limiting portion 241 or the limiting groove 35 is damaged due to stress concentration when the first limiting portion 241 abuts against the limiting groove 35.

[0137] In addition, in the direction perpendicular to the extension direction of the first extension portion 241 and the first direction X, for example, as Figure 13 shown, along the second direction Y, the first extension portions 241 are oppositely arranged on both sides of the outer shell 24, and the first extension portions 241 can abut against the side walls of the limiting groove 35 in the second direction Y. That is, the first extension portions 241 can clamp the middle beam 3 in the second direction Y to limit the movement of the display module 2 in the second direction Y, thereby reducing the risk of abnormal binocular optical axis fusion of the wearer caused by different distances between the display module 2 and the left and right eyes of the wearer.

[0138] Figure 14 Schematic diagram of the connection structure between the display module and the middle beam in an embodiment, as Figure 14As shown, along the extending direction of the first extension part 241, for example, along the third direction Z, on the side of the first extension part 241 facing away from the housing 24, a second extension part 242 is provided. The second extension part 242 and the first extension part 241 are connected to form a V-shaped or L-shaped structure. In the distribution direction of the display module 2 and the middle beam 3, for example, in the third direction Z, the second extension part 242 abuts against the side of the middle beam 3 facing away from the display module 2, that is, the housing 24 and the second extension part 242 clamp the middle beam 3 in the third direction Z to limit the movement of the display module 2 in the third direction Z, thereby reducing the risk of abnormal binocular optical axis fusion of the wearer caused by the height difference between the display module 2 and the left and right eyes of the wearer.

[0139] In addition, the first extension part 241 can clamp the middle beam 3 in the second direction Y, and the housing 24 and the second extension part 242 clamp the middle beam 3 in the third direction Z, reducing the risk of the display module 2 swinging perpendicular to the first direction X. At the same time, referring to Figure 9 , the above structure reduces the risk that there is an angle or even a large angle between the optical axes of the first display module 25 and the second display module 26. Usually, the angle between the optical axes of the first display module 25 and the second display module 26 should not be greater than 0.2°, thereby reducing the risk of unclear virtual information imaging of the near-eye display device and even abnormal binocular optical axis fusion of the wearer, thus improving the reliability of virtual information transmission and the accuracy of imaging of the near-eye display device to enhance the use experience of the wearer.

[0140] Figure 15 It is a schematic diagram of the partial structure of the display module connected to the spectacle frame when it is in the first gear. As Figure 15 shown, a first seal 4 is filled in the gap between the display module 2 and the spectacle frame 1. The first seal 4 is adhesively fixed to the display module 2 and the spectacle frame 1 through a colloid. The first seal 4 is a seal with elastic deformation ability such as silica gel or rubber. At this time, the first seal 4 is compressed and deformed under the clamping action of the display module 2 and the spectacle frame 1 and has a resilience.

[0141] Figure 16 It is a schematic diagram of the partial structure of the display module connected to the spectacle frame when it is in the second gear. As Figure 16 shown, when the display module is adjusted from the Figure 15 shown first gear to the Figure 16 shown second gear, the gap between the display module 2 and the spectacle frame 1 increases. At this time, the first seal 4 can recover and deform under the action of its own resilience, so as to fill and seal the gap between the display module 2 and the spectacle frame 1 again, thereby improving the sealing performance between the display module 2 and the spectacle frame 1, which is beneficial to improving the waterproof and dustproof performance of the near-eye display device.

[0142] Figure 17Schematic diagram of the partial structure of a near-eye display device in an embodiment, as Figure 17 shown. In any of the above embodiments, an operation hole 13 may be provided on the frame 1. At the same time, referring to Figure 9 , the fasteners for fixing the first display module 25 and the second display module 26 are exposed at the operation hole 13, that is, the wearer can directly perform operations such as disassembly, displacement, and installation on the first display module 25 and the second display module 26 at the operation hole 13, thereby reducing the difficulty of adjusting the optical axis spacing of the near-eye display device. Among them, the operation hole 13 may be located on the side wall of the frame 1, or on the bottom wall of the frame 1, or on the top wall of the frame 1. The embodiment of the present application does not make special limitations on the setting position of the operation hole 31. Figure 17 Taking the operation hole 13 located at the bottom of the frame 1 as an example.

[0143] Taking Figure 17 the near-eye display device shown as an example, a sensor (not marked in the figure) may be provided in the frame 1. The sensor can be used to detect the change values of parameters such as the position and distance of the display module 2, and transmit the change values to the control module. The control module (not marked in the figure) can convert the change values of parameters such as the position and distance of the display module 2 into the actual value of the optical axis spacing of the near-eye display device, and the control module adjusts the display parameters of the virtual information of the near-eye display device according to the actual value of the optical axis spacing. The display parameters include but are not limited to brightness, size, imaging position, and the distance from the wearer's eyes, etc., so that wearers with different pupil distance parameters have a consistent viewing effect. For example, sensors are provided at the first hole position 311 and the second hole position 312 shown in Figure 9 . When the display module 2 is installed at the first hole position 311 or the second hole position 312 through the fastener, the sensor can be blocked. The sensor determines that the display module 2 is in the first gear or the second gear based on this, and transmits the detection result to the control module. The control module adjusts the display parameters of the display module 2 according to the received signal to adjust the viewing effect of the wearer.

[0144] In a possible design, before the near-eye display device leaves the factory, the gear of the display module 2 can be calibrated first. That is, after the wearer adjusts the installation position of the display module, the control module can automatically adjust the display parameters of the display module according to the detection result of the sensor.

[0145] In another possible design, the gear position, display parameters and other information of the display module 2 can be entered into the control software of the near-eye display device. After the wearer adjusts the installation position of the display module 2, the gear information of the display module 2 is manually adjusted through the control software so that the gear information in the control software is consistent with the actual gear information. Thereafter, the control software transmits the gear information and the matching display parameters to the control module, and the control module controls and adjusts the display parameters of the display module so that the actual display parameters of the display module 2 are consistent with the actual gear.

[0146] Figure 18 A schematic diagram showing the connection structure between the module and the center beam in one embodiment is shown. Figure 18 As shown, the near-eye display device also includes a flexible circuit board 5. One end of the flexible circuit board 5 passes through a through hole (not shown) in the first beam 32 and is electrically connected to the first display module 25. The other end of the flexible circuit board 5 passes through a through hole (not shown) in the second beam 33 and is electrically connected to the second display module 26. The flexible circuit board 5 is used to transmit signals between the optical engine and other electronic components of the display module. The signals include but are not limited to image data, control signals, etc. Due to the flexible characteristics of the flexible circuit board 5, the flexible circuit board 5 can be flexibly arranged in a small space, thereby reducing the space occupied by the circuit of the near-eye display device and reducing the complexity of the circuit of the near-eye display device. This is conducive to reducing the overall size of the near-eye display device and improving the assembly efficiency and reducing the difficulty of assembly of the near-eye display device. The same flexible circuit board 5 is simultaneously connected to the optical engine of the first display module 25 and the optical engine of the second display module 26, further reducing the complexity of the circuit of the near-eye display device.

[0147] Figure 19 FIG. 1 is a schematic diagram of a connection structure of a flexible circuit board in one embodiment. Figure 19 As shown, the flexible circuit board 5 includes a first connecting portion 51, a second connecting portion 52 and a third connecting portion 53. Figure 18 The first connecting part 51 is used to connect to the optical machine of the first display module 25, and the third connecting part 53 is used to connect to the optical machine of the second display module 26. One end of the second connecting part 52 is connected to the first connecting part 51, and the other end of the second connecting part 52 extends through the through hole on the first beam body 32 to the side of the middle beam 3 away from the display module 2, and then extends into the through hole on the second beam body 33 to connect with the third connecting part 53.

[0148] Among them, such as Figure 19As shown, the local part of the second connecting portion 52 is bent to form a redundant portion 521. During the process of adjusting the optical axis distance between the first display module 25 and the second display module 26, the redundant portion 521 can be straightened or bent, so that the second connecting portion 52 has a certain deformation margin, thereby reducing the risk of the flexible circuit board 5 being broken, and further improving the working stability of the flexible circuit board 5 and the near-eye display device and extending the service life.

[0149] Figure 20 It is a schematic diagram of the partial structure of a near-eye display device in an embodiment. As Figure 20 shown, the near-eye display device further includes a knob 6. One end of the knob 6 is exposed outside the frame 1, and the other end of the knob 6 extends into the frame 1 and is connected to the display module 2. The knob 6 is used to adjust the focal length of the optical lens module, so that wearers with different visual acuities can all see clear information images, so that the near-eye display device can cover people with different myopia degrees, and the near-eye display device can be compatible with a wider range of people. Among them, the specific structure and method for adjusting the focal length in the embodiments of the present application are not specially limited.

[0150] Figure 21 It is a schematic diagram of the structure of the knob in an embodiment. As Figure 21 shown, the knob 6 includes a head 61 and a rod body 62. The rod body 62 is used to be connected to the display module 2. The wearer drives the rod body 62 to move by controlling the movement of the head 61, so as to realize the adjustment of the focal length of the display module 2.

[0151] Figure 22 It is an enlarged view of the partial structure of the frame where the knob is installed. As Figure 22 shown, a groove body 14 is provided on the frame 1. At the same time, referring to Figure 21 , at least part of the head 61 is exposed in the groove body 14, and a hole 15 is provided inside the groove body 14. The rod body 62 of the knob 6 can extend into the frame 1 through the hole 15, so as to facilitate the connection between the rod body 62 and the display module 2.

[0152] During the process of adjusting the focal length by the knob 6, the knob � will move relative to the frame 1. The hole 15 extends along the moving direction of the rod body 62 to reduce the risk that the hole 15 limits the rod body 62 and causes the knob 6 to be unable to move and fail. A second seal (not marked in the figure) is sleeved on the rod body 62. The second seal can be arranged inside the groove body 14 and outside the hole 15, or can be arranged inside the hole 15.

[0153] Figure 23 It is a cross-sectional view of the structure of the second seal in an embodiment. As Figure 23As shown, a first colloid 631 is provided on the outer side wall of the second seal 63. The second seal 63 is adhesively fixed to the side wall of the groove body 14 or the duct 15 through the first colloid 631. A second colloid 632 is provided on the inner side wall of the second seal 63. The second seal 63 is adhesively fixed to the rod body 63 through the second colloid 632. The second seal 63 is used to block the exposed duct 15 to improve the sealing performance between the knob 6 and the spectacle frame 1, which is beneficial to improving the waterproof and dustproof performance of the near-eye display device.

[0154] Among them, the second seal 63 is a seal with elastic deformation ability such as silica gel and rubber. When the knob 6 moves, the second seal 63 can be squeezed and deformed to reduce the risk that the second seal 63 limits the rod body 62 and causes the knob 6 to fail to move. In addition, the second seal 63 has strong deformation ability. When the knob 6 moves, one side of the second seal 63 is squeezed and shrunk, and the other side expands, so that the space between the rod body 62 and the duct 15 and the space between the knob 6 and the groove body 14 are kept in a state of being filled and sealed by the second seal 63. That is, the strong deformation ability makes the second seal 63 have a good sealing effect and reduces the risk of the second seal 63 losing its sealing effectiveness due to the movement of the knob 6.

[0155] In summary, for the near-eye display device provided in the embodiment of the present application, taking the minimum optical axis spacing of 10 mm and the maximum adjustment distance of 6 mm as an example, that is, the optical axis spacing can be adjusted stepwise or steplessly within the range of 10 mm to 16 mm, so that the coverage ratio of the available population of the near-eye display device is not less than 95%. The applicable range of the near-eye display device is significantly improved. At the same time, the overall size and weight of the near-eye display device can be effectively reduced, which is convenient for the storage, carrying and wearing of the near-eye display device.

[0156] For the same or similar parts among the various embodiments in this specification, reference can be made to each other.

Claims

1. A near-eye display device, characterized in that, The near-eye display device includes: a frame; a display module, mounted on the frame; a middle beam, the display module is connected to the middle beam, the middle beam is provided with a first mounting hole position, and the first mounting hole position at least includes a first hole position and a second hole position distributed along a first direction; When the display module is mounted on the first hole position, the display module is in a first gear position; When the display module is mounted on the second hole position, the display module is in a second gear position.

2. The near-eye display device according to claim 1, wherein The display module includes a first display module and a second display module distributed along the first direction; The middle beam includes a first beam body and a second beam body distributed along the first direction; The first mounting hole position is arranged on the first beam body, and the first display module is mounted on the first mounting hole position; A second mounting hole position is arranged on the second beam body, and the second display module is mounted on the second mounting hole position; the number of the second mounting hole positions in the first direction is at least one.

3. The near-eye display device according to claim 2, wherein The middle beam is provided with a limiting groove; The display module is provided with a first extension portion, the first extension portion extends along the distribution direction of the display module and the middle beam, at least a part of the first extension portion is located in the limiting groove, and in the first direction, the first extension portion can abut against the side wall of the limiting groove to limit the moving distance of the display module in the first direction.

4. The near-eye display device according to claim 3, wherein Along a second direction, the first extension portions are oppositely arranged on both sides of the display module; In the second direction, the first extension portion abuts against the side wall of the limiting groove to limit the movement of the display module relative to the middle beam in the second direction.

5. The near-eye display device according to claim 4, wherein, On the side of the first extension portion away from the display module in the extending direction of the first extension portion, a second extension portion is connected, and the second extension portion and the first extension portion are connected into a V-shaped or L-shaped structure; In a third direction, the second extension portion abuts against the middle beam to limit the movement of the display module relative to the middle beam in the third direction.

6. The near-eye display device according to any one of claims 2 to 5, characterized in that The middle beam further includes a third beam body, and both ends of the third beam body are respectively connected to the first beam body and the second beam body; The third beam body is provided with a third mounting hole position and a fourth mounting hole position, the first beam body is mounted at the third mounting hole position through a fastener, and the second beam body is mounted at the fourth mounting hole position through a fastener.

7. The near-eye display device according to claim 6, wherein In the first direction, the number of the third mounting hole positions is at least two; and / or, in the first direction, the number of the fourth mounting hole positions is at least two.

8. The near-eye display device according to claim 6, wherein The third beam body is provided with a mounting groove, a part of the first beam body is located in the mounting groove and abuts against the side wall of the mounting groove, and a part of the second beam body is located in the mounting groove and abuts against the side wall of the mounting groove.

9. The near-eye display device according to any one of claims 2 to 5, characterized in that, The near-eye display device includes a flexible circuit board, the flexible circuit board includes a first connection portion, a second connection portion and a third connection portion, the first connection portion is connected to the first display module, the third connection portion is connected to the second display module, and both ends of the second connection portion are respectively connected to the first connection portion and the second connection portion; The second connecting portion is provided with a redundant portion.

10. The near-eye display device according to any one of claims 1 to 5, characterized in that, The near-eye display device further includes a knob. One end of the knob is connected to the display module, and the other end of the knob extends outside the frame and is exposed. The knob is used to adjust the focal length of the display module.

11. The near-eye display device according to claim 10, wherein, The knob includes a head and a rod. The frame is provided with a groove. At least part of the head is located and exposed in the groove. The groove is provided with a hole. One end of the rod is connected to the head, and the other end of the rod extends into the frame through the hole and is connected to the display module; The near-eye display device further includes a second seal. The second seal is sleeved on the rod, and the second seal is used to block the hole.

12. The near-eye display device according to any one of claims 1 to 5, characterized in that, The near-eye display device further includes a first seal. The first seal is located between the display module and the frame, and the first seal is used to seal the gap between the display module and the frame.

13. The near-eye display device according to any one of claims 1 to 5, characterized in that, The near-eye display device further includes a sensor and a control module. The sensor is electrically connected or signal-connected to the control module; The sensor is a position sensor, and the position sensor is used to detect the position of the display module. Alternatively, the sensor is a distance sensor, and the distance sensor is used to detect the distance change value of the display module; The control module is used to adjust the display parameters of the near-eye display device according to the detection result of the sensor.

Images