Near-eye display device

Abstract

A near-eye display device, comprising a frame (1), a display module (2), and a bridge (3), wherein the display module (2) is mounted on the frame (1) and is connected to the bridge (3); the bridge (3) is provided with a first mounting hole position (31); the first mounting hole position (31) at least comprises a first hole position (311) and a second hole position (312) distributed in a first direction (X); when the display module (2) is mounted at the first hole position (311), the display module (2) is located at a first position; and when the display module (2) is mounted at the second hole position (312), the display module (2) is located at a second position. Thus, the adjustable range of the optical axis spacing of the near-eye display device is increased, which allows the near-eye display device to accommodate a broader range of users. In addition, the mounting position of the display module (2) is adjusted by changing the locking position of a fastener, and thus the optical axis spacing is adjusted, which decreases the complexity of an optical axis spacing adjustment structure, thereby simplifying the structures of the display module (2) and the bridge (3); therefore, it is conducive to reducing the sizes of the display module (2), the bridge (3) and the near-eye display device, thereby facilitating a compact and lightweight design for the near-eye display device.

Description

A near-eye display device

[0001] The present application claims priority to the Chinese patent application No. 202422349001.9, filed on September 25, 2024, and entitled "A near-eye display device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of head-mounted smart devices, in particular to a near-eye display device. BACKGROUND

[0003] The near-eye display device is used to transmit virtual information such as graphics, numbers, icons to the wearer's glasses in the form of light, 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, which correspond to the left and right eyes of the wearer respectively. When the optical axis of the first display module is directly opposite the left eye and the optical axis of the second display module is directly opposite 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 interpupillary distance of the wearer matches the optical axis distance 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 distance of the first display module and the second display module determines the adaptive population of the near-eye display device.

[0004] In order to improve the coverage range of the near-eye display device, the useable population of the near-eye display device can be improved by increasing the eyebox size. However, the increase in the eyebox size means that light needs to be collected and focused from a wider angle into the wearer's eyes, which requires larger and more complex optical lens modules, 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 eyebox size to accommodate different interpupillary distances of the population still has certain limitations and cannot accommodate a large enough range of the population. Many wearers still have the phenomenon of not being able to see clearly or the edge being blurred.

[0005] Under the premise of improving the coverage range of the near-eye display device, how to reduce the size and weight of the device is an important problem that needs to be solved in the field.

[0006] SUMMARY

[0007] In view of this, the present application provides a near-eye display device which can accommodate a larger range of the population and also reduce the size and weight of the device.

[0008] The application provides a near-eye display device, comprising a frame, a display module and a middle beam, the display module is installed on the frame and connected with the middle beam, the middle beam is provided with a first mounting hole position, the first mounting hole position comprises at least a first hole position and a second hole position distributed along a first direction, when the display module is installed on the first hole position, the display module is located at a first gear position, and when the display module is installed on the second hole position, the display module is located at a second gear position.

[0009] In the application, the display module has at least two adjustable gear positions, so that the adjustable range of the optical axis distance of the near-eye display device is improved, and the applicable population of the near-eye display device is expanded. In addition, the mounting position of the display module is adjusted by replacing the locking position of the fastener, and then the optical axis distance is adjusted, so that the complexity of the optical axis distance adjusting structure is reduced, thereby simplifying the structure of the display module and the middle beam, and then facilitating the reduction of the size of the display module, the middle beam and the near-eye display device, so as to realize the miniaturization and lightweight design of the near-eye display device.

[0010] In a possible design, the display module comprises a first display module and a second display module distributed along a first direction; the middle beam comprises 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, the first display module is installed on the first mounting hole position, the second beam body is provided with a second mounting hole position, and the second display module is installed on the second mounting hole position; the number of the second mounting hole positions in the first direction is at least one.

[0011] In the application, the near-eye display device can be a single-side adjusting structure or a double-side adjusting structure. When the near-eye display device is a single-side adjusting structure, the wearer only needs to adjust the mounting position of the first display module to realize the adjustment of the optical axis distance, thereby facilitating the simplification of the operation of the wearer to adjust the optical axis distance, and further simplifying the adjustment difficulty of the wearer; when the near-eye display device is a double-side adjusting 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 distance of the near-eye display device.

[0012] 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, and in the first direction, the first extension part can abut against the side wall of the limiting groove to limit the movement distance of the display module in the first direction.

[0013] In the application, the first extension part can abut against the side wall of the limiting groove in the first direction to limit the movement distance of the display module in the first direction, thereby reducing the risk that the display module moves a large distance and contacts the frame, causing damage to the frame or the display module.

[0014] In a possible design, the first extension part is arranged opposite to two sides of the display module in the second direction; and the first extension part abuts against the side wall of the limiting groove in the second direction, so as to limit the movement of the display module relative to the middle beam in the second direction.

[0015] In the application, the first extension part can clamp the middle beam in the second direction, so as to limit the movement of the display module in the second direction, thereby reducing the risk of binocular optical axis fusion abnormality of the wearer caused by different distances between the display module and the left and right eyes of the wearer.

[0016] In a possible design, the first extension part is connected with a second extension part on the side away from the display module in the extension direction of the first extension part, and the second extension part is connected with the first extension part in a V-shaped or L-shaped structure; and the second extension part abuts against the middle beam in the third direction, so as to limit the movement of the display module relative to the middle beam in the third direction.

[0017] In the application, the first extension part can clamp the middle beam in the second direction, and the shell and the second extension part clamp the middle beam in the third direction, thereby reducing the risk of swinging of the display module in the direction perpendicular to the first direction, reducing the risk of the existence of an included angle or even a large included angle between the optical axes of the first display module and the second display module, further reducing the risk of unclear virtual information imaging or binocular optical axis fusion abnormality of the wearer of the near-eye display device, and 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.

[0018] In a possible design, the middle beam further includes a third beam body, and two ends of the third beam body are connected with the first beam body and the second beam body respectively; the third beam body is provided with a third mounting hole and a fourth mounting hole, and the first beam body is mounted at the third mounting hole through a fastener, and the second beam body is mounted at the fourth mounting hole through a fastener.

[0019] In the application, the first beam body is fixedly connected with the third beam body and the second beam body is fixedly connected with the third beam body through fasteners, so as to facilitate the mounting and dismounting of the first beam body, the second beam body and the third beam body, and reduce the difficulty of mounting and dismounting of the middle beam

[0020] In a possible design, the number of third mounting holes is at least two in the first direction; and / or, the number of fourth mounting holes is at least two in the first direction.

[0021] In the 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 mounting positions of the first beam body and / or the second beam body are adjustable, which can further increase the adjustable range of the optical axis distance of the near-eye display device, thereby further expanding the applicable population of the near-eye display device.

[0022] In a possible design, the third beam body is provided with a mounting groove, a portion of the first beam body is located in the mounting groove and abuts against the sidewall of the mounting groove, and a portion of the second beam body is located in the mounting groove and abuts against the sidewall of the mounting groove.

[0023] In this application, in the process of adjusting the mounting positions of the first beam body and the second beam body, the first beam body and the second beam body can move along the mounting groove, thereby reducing the risk that the first beam body and the second beam body deviate during the movement and cause difficulties in mounting or even failure to mount.

[0024] In a possible design, the near-eye display device includes a flexible circuit board, the flexible circuit board includes a first connecting part, a second connecting part, and a third connecting part, the first connecting part is connected with the first display module, the third connecting part is connected with the second display module, and two ends of the second connecting part are connected with the first connecting part and the second connecting part respectively; the second connecting part is provided with a redundant part.

[0025] In this application, in the process of adjusting the optical axis distance between the first display module and the second display module, the redundant part can be straightened or bent, so that the second connecting part has a certain deformation allowance, thereby reducing the risk of the flexible circuit board being pulled off, and further improving the working stability of the flexible circuit board and the near-eye display device and prolonging the service life.

[0026] In a possible design, the near-eye display device further includes a knob, one end of the knob is connected with the display module, and the other end of the knob extends to outside the frame and is exposed, and the knob is used to adjust the focal length of the display module.

[0027] In this application, the knob is used to adjust the focal length of the optical lens module, so that wearers with different visual acuities can see clear information images, thereby enabling the near-eye display device to cover people with different degrees of myopia and enabling the near-eye display device to be compatible with a larger range of people. The specific structure and method of adjusting the focal length are not specially limited in this embodiment.

[0028] In a possible design, the knob includes a head part and a rod body, the frame is provided with a groove, at least part of the head part is located in the groove and is exposed, the groove is provided with a hole, one end of the rod body is connected with the head part, and the other end of the rod body extends to inside the frame through the hole and is connected with the display module; the near-eye display device further includes a second sealing member, the second sealing member is sleeved on the rod body, and the second sealing member is used to block the hole.

[0029] In this application, the second sealing member is used to block the exposed hole, so as to improve the sealing performance between the knob and the frame and facilitate improvement of the waterproof and dustproof performance of the near-eye display device.

[0030] In a possible design, the near-eye display device further includes a first sealing member located between the display module and the frame, and configured to seal the gap between the display module and the frame.

[0031] In the present application, when the gear of the display module is adjusted, the gap between the display module and the frame is increased, and the first sealing member can be deformed under the action of the elastic force of the first sealing member, so as to fill the gap between the display module and the frame again, thereby improving the sealing performance between the display module and the frame, and facilitating improvement of the waterproof and dustproof performance of the near-eye display device.

[0032] 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 configured to detect the position of the display module, or the sensor is a distance sensor configured to detect the distance change value of the display module; and the control module is configured to adjust the display parameter of the near-eye display device according to the detection result of the sensor.

[0033] In the present application, the control module adjusts the display parameter of the virtual information of the near-eye display device according to the actual value of the optical axis distance, so that the wearer without the interpupillary distance parameter has consistent viewing effect. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0035] FIG. 1 is a partial structural schematic diagram of a near-eye display device in an embodiment;

[0036] FIG. 2 is an optical principle schematic diagram of a display module in an embodiment;

[0037] FIG. 3 is an optical principle schematic diagram of a display module in another embodiment;

[0038] FIG. 4 is a structural schematic diagram of a display module in an embodiment;

[0039] FIG. 5 is a connection structural schematic diagram of a display module in a near-eye display device in an embodiment;

[0040] FIG. 6 is a connection structural schematic diagram of a display module in a near-eye display device in an embodiment;

[0041] FIG. 7 is a structural schematic diagram of a near-eye display device in a first gear;

[0042] Fig. 8 is a schematic diagram of the structure of the near-eye display device provided by the present application in the second gear;

[0043] Fig. 9 is a schematic diagram of the connection structure of the display module in the near-eye display device provided by the present application in another embodiment;

[0044] Fig. 10 is a schematic diagram of the structure of the middle beam in an embodiment provided by the present application;

[0045] Fig. 11 is a schematic diagram of the partial structure of the middle beam in another embodiment provided by the present application;

[0046] Fig. 12 is a schematic diagram of the partial structure of the middle beam in yet another embodiment provided by the present application;

[0047] Fig. 13 is a schematic diagram of the partial structure of the display module in the near-eye display device provided by the present application in yet another embodiment;

[0048] Fig. 14 is a schematic diagram of the partial structure of the display module in the near-eye display device provided by the present application in yet another embodiment;

[0049] Fig. 15 is a schematic diagram of the partial structure of the display module in the near-eye display device provided by the present application in the first gear;

[0050] Fig. 16 is a schematic diagram of the partial structure of the display module in the near-eye display device provided by the present application in the second gear;

[0051] Fig. 17 is a schematic diagram of the partial structure of the near-eye display device in an embodiment provided by the present application;

[0052] Fig. 18 is a schematic diagram of the connection structure of the display module in the near-eye display device provided by the present application in yet another embodiment;

[0053] Fig. 19 is a schematic diagram of the structure of the flexible circuit board in Fig. 18;

[0054] Fig. 20 is a schematic diagram of the partial structure of the near-eye display device in yet another embodiment provided by the present application;

[0055] Fig. 21 is a schematic diagram of the structure of the knob in Fig. 20;

[0056] Fig. 22 is a schematic diagram of the partial structure of the frame in Fig. 20;

[0057] Fig. 23 is a schematic diagram of the structure of the second sealing member provided by the present application.

[0058] Reference signs: 01-eye; 02-eyecup; 021-first eyecup; 022-second eyecup; 1-frame; 11-frame body; 12-temples; 13-operation hole; 14-groove body; 15-hole; 2-display module; 21-optical engine; 22-optical lens module; 23-light guide; 24-housing; 241-first extension; 242-second extension; 25'-first module; 251'-first optical axis; 26'-second module; 261'-second optical axis; 25-first display module; 26-second display module; 3-bridge; 31-first mounting hole; 311-first hole; 312-second hole; 32-first bridge body; 33-second bridge body; 34-third bridge body; 341-third mounting hole; 342-fourth mounting hole; 343-mounting groove; 35-limiting groove; 36-second mounting hole; 361-third hole; 362-second hole; 4-first sealing member; 5-flexible circuit board; 51-first connecting part; 52-second connecting part; 521-redundant part; 53-third connecting part; 6-knob; 61-head; 62-shaft; 63-second sealing member; 631-first adhesive; 632-second adhesive. DETAILED DESCRIPTION

[0059] In order to better understand the technical solutions of the present application, the embodiments of the present application are described in detail below with reference to the drawings.

[0060] It should be clear that the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0061] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" 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.

[0062] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0063] Embodiments of the present application provide a near-eye display device, which includes but is not limited to an augmented reality (AR) glasses, an AR helmet, a virtual reality (VR) glasses or a VR helmet, and the like head-mounted smart devices with a near-eye display function. Taking the AR glasses as an example, Fig. 1 is a structural schematic diagram of the AR glasses, as shown in Fig. 1, the near-eye display device includes a first direction X, a second direction Y and a third direction Z. Taking the near-eye display device when being 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-rear direction of the wearer, and the third direction Z is parallel to the up-down direction of the wearer.

[0064] As shown in Fig. 1, the near-eye display device includes a frame 1, the frame 1 includes a frame body 11 and a temple 12 arranged on both sides of the frame body 11 along the first direction X, and 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.

[0065] Fig. 2 is an optical principle schematic diagram of the display module in an embodiment, as shown in Fig. 2, the display module 2 includes an optical engine 21 and an optical lens module 22, the optical engine 21 is used for emitting digital, pattern, text, color and the like virtual information in the form of light to the optical lens module 22, and the optical lens module 22 performs multiple refraction, transmission, reflection and the like operations on the light, and finally outputs the light along the optical axis of the optical lens module 22 to the eyes 01 of the wearer, so as to realize the receiving of the virtual information by the wearer. The light output by the optical lens module 22 coincides 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 output by the optical lens module 22 to the eyes 01 of the wearer in the transmission process. The display module further includes an eyebox 02, when the eyes 01 of the wearer are aligned with the optical axis, a conical region 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 eyebox range, as the deviation distance gradually increases, the virtual information seen by the wearer becomes more and more blurred, and when the eyes leave the range of the eyebox 02, the wearer cannot see the virtual information.

[0066] Referring to Fig. 1 again, the optical lens module 22 is mounted on the frame body 11, and at least part of the optical lens module 22 is exposed and directly opposite to the eyes 01 of the wearer in the second direction Y, so as to facilitate the wearer to receive the virtual information, and the optical engine 21 in Fig. 2 can be mounted on the temple 12 or the frame body 11.

[0067] When the light machine 21 is installed on the glasses leg, as shown in FIG. 2, a light guide 23 can be arranged between the light machine 21 and the optical lens module 22. The light guide 23 can be installed on the frame 11 in FIG. 1 or the glasses leg 12. The light guide 23 is used to change the propagation direction of light, so as to guide the light emitted by the light machine 21 into the optical lens module 22. The light guide 23 can be a mirror or a light waveguide structure. FIG. 2 takes the light guide 23 as a mirror as an example. When the light machine 21 is installed on the glasses leg 11, the flexibility of the installation position of the light machine 21 can be increased, so as to facilitate the reduction of the size of the frame, and further facilitate the miniaturization and lightweight design of the near-eye display device as a whole.

[0068] When the light machine 21 is installed on the frame 12, as shown in FIG. 3, which is a schematic diagram of the optical principle of the display module in another embodiment. At this time, the light emitted by the light machine 21 directly enters the optical lens module 22, and then is transmitted to the eye 01 of the wearer through the optical lens module 22. The loss caused by transmission in the light propagation process is reduced, so as to facilitate the improvement of the accuracy and reliability of the information transmission of the optical lens module.

[0069] FIG. 4 is a structural schematic diagram of the display module. As shown in FIG. 4, the display module 2 further includes a housing 24. The light machine 21 and the optical lens module 22 mentioned above are both installed on the housing 24. The housing 24 is fixedly connected with the frame 11 in FIG. 1, and at least part of the optical lens module 22 is exposed. Installing the light machine 21 and the optical lens module 22 on the same housing 24 can improve the accuracy of the relative position of the light machine and the optical lens module 22 during use and transportation, thereby improving the accuracy and reliability of the light signal transmission between the light machine and the optical lens module, and further improving the working stability of the near-eye display device.

[0070] Based on the display module 2 shown in FIG. 4, FIG. 5 is a connection structure schematic diagram of the display module in the near-eye display device in an embodiment. As shown in FIG. 5, in the near-eye display device, two display modules are usually provided, which are respectively referred to as a first module 25' and a second module 26'. That is, the near-eye display device includes the first module 25' and the second module 26' distributed along a first direction X. The first module 25' includes a first optical axis 251' and a first eyebox 021, and the second module 26' includes a second optical axis 261' and a second eyebox 022. Virtual information will be output along the first optical axis 251' and the second optical axis 261' and enter the eye 01 of the wearer. When the left eye and the right eye of the wearer are located in the areas of the first eyebox 021 and the second eyebox 022 respectively, the wearer can receive relatively clear virtual information. When the left eye and the right eye of the wearer are respectively aligned with the first optical axis 251' and the second optical axis 261', that is, the left eye and the right eye are respectively located at the centers of the first eyebox 021 and the second eyebox 022, the virtual information received by the wearer is the clearest.

[0071] Since there is a certain difference in the interpupillary distance of different people, for example, the interpupillary distance of adults is larger, and the interpupillary distance of minors is smaller, therefore, when people with different interpupillary distances wear, the clarity of the virtual information seen is different, in order to improve the consistency of the clarity, the size of the first eye box 021 and the second eye box 022 can be increased to increase the user population of the near-eye display device, but the size of the first eye box 021 and the second eye box 022 is increased, which means that light needs to be collected and focused from a wider angle into the wearer's eyes, thereby requiring larger and more complex optical lens modules, that is, the overall size and thickness of the first module 25' and the second module 26' are large, which is not conducive to the miniaturization and lightweight development of the near-eye display device, at the same time, relying only on expanding the size of the eye box to accommodate the interpupillary distance of different people still has certain limitations, and cannot accommodate a large enough range of people, and many wearers still have the status of not being able to see clearly, blurred edges, etc.

[0072] In order to increase the distance between the first optical axis 251' and the second optical axis 261', a motor, a gear and other mechanical structures 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, adjusting the optical axis distance of the first module 25' and the second module 26', so that the optical axis distance of the near-eye display device can be adjusted according to the interpupillary distance of different wearers, for example, a motor, a gear, a rack and other mechanical structures are arranged on the near-eye display device, the motor drives the gear to rotate, and the gear drives the rack to move, thereby realizing the left and right movement of the first module 25' and the second module 26', and finally realizing the adjustment of the optical axis distance of the first module 25' and the second module 26', but such an adjustment structure will greatly increase the overall size of the near-eye display device, which brings great challenges to the thinness of the whole machine.

[0073] In view of this, the embodiment of the present application provides a near-eye display device to solve the above technical problems.

[0074] Figure 6 is a partial structure schematic diagram of a display module in an embodiment, as shown in Figure 6, the near-eye display device includes a display module 2 and a middle beam 3, the middle beam 3 extends along a first direction X, and on the first direction X, both sides of the middle beam 3 are connected with the display module 2, and the two display modules 2 are respectively denoted as a first display module 25 and a second display module 26, and 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.

[0075] As shown in FIG. 6, the middle beam 3 can be provided with a first mounting hole position 31 and a second mounting hole position 36, the first display module 25 is fixed at the first mounting hole position 31 by a fastener, and the second display module 26 is fixed at the second mounting hole position 36 by a fastener, the fastener includes but is not limited to a screw, a bolt, etc., wherein the first mounting hole position 31 can at least include a first hole position 311 and a second hole position 312 distributed at intervals 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, and 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.

[0076] FIG. 7 is a structural schematic view of the near-eye display device in the first gear position, and FIG. 8 is a structural schematic view of the near-eye display device in the second gear position. In the embodiment of the present application, the display module has at least adjustable first and second gear positions, and when the display module is switched between the first and second gear positions, the optical parameters of the near-eye display device can be adjusted, taking the optical axis distance between the first and second display modules 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 shown in FIG. 7, the optical axis distance L between the first and second display modules 25 and 26 is large, so that a wearer with a large pupil distance can see a clear virtual information image. The wearer can also adjust the optical axis distance by controlling the mounting 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 shown in FIG. 8, the optical axis distance L between the first and second display modules 25 and 26 is small, so that a wearer with a 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 distance of the near-eye display device, so as to expand the applicable population of the near-eye display device. In addition, the mounting position of the first display module 25 is adjusted by replacing the fastener on the middle beam 3, thereby adjusting the optical axis distance between the first and second display modules 25 and 26, which reduces the complexity of the optical axis distance adjustment structure, thereby simplifying the structure of the display module 2 and the middle beam 3, and further facilitating the miniaturization and lightweight design of the near-eye display device.

[0077] The near-eye display device can be a single-side adjustment structure or a double-side adjustment structure.

[0078] When the near-eye display device is a single-side adjustment structure, as shown in FIG. 6, along the first direction X, the bridge 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, and the first beam body 32 is provided with at least two first mounting hole positions 31 distributed along the first direction X, and the two first mounting hole positions 31 are respectively denoted as a first hole position 311 and a second hole position 312, so that the first display module 25 has at least two adjustable mounting positions, and the second beam body 33 is provided with a second mounting hole position 36, so that the mounting position of the second display module 26 is not adjustable.

[0079] In this embodiment, the near-eye display device is a single-side adjustment structure, so that the wearer only needs to adjust the mounting position of the first display module 25 to realize the adjustment of the optical axis distance, thereby facilitating the simplification of the operation of the wearer to adjust the optical axis distance, and further simplifying the adjustment difficulty of the wearer.

[0080] When the near-eye display device is a double-side adjustment structure, FIG. 9 is a structural schematic diagram of the bridge in an embodiment, as shown in FIG. 9, the first beam body 32 is provided with at least two first mounting hole positions 31, and the two first mounting hole positions 31 are distributed along the first direction X, for example, the two first mounting hole positions 31 are respectively denoted as a first hole position 311 and a second hole position 312, so that the first display module 25 has at least two adjustable mounting positions, and the second beam body 33 is provided with at least two second mounting hole positions 36, and the two second mounting hole positions 36 are distributed along the first direction X, for example, the two second mounting hole positions 36 are respectively denoted as a third hole position 361 and a fourth hole position 362, so that the second display module 26 has at least two adjustable mounting positions.

[0081] In this embodiment, the near-eye display device is a double-side adjustment structure, so that the distance between the first display module 25 and the second display module 26 can be further increased, thereby further improving the adjustable range of the optical axis distance of the near-eye display device.

[0082] Specifically, as shown in FIG. 9, the bridge 3 further includes a third beam body 34, and along the first direction X, the two ends of the third beam body 34 are connected with the first beam body 32 and the second beam body 33 respectively. In a possible design, as shown in FIG. 9, the first beam body 32, the second beam body 33 and the third beam body 34 are integrally formed, so as to improve the stability of the overall structure of the bridge 3.

[0083] Fig. 10 is a schematic view of the structure of the middle beam in an embodiment. As shown in Fig. 10, 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 with the third beam body 34, and the second beam body 33 is fixedly connected with the third beam body 34. The connection modes of the first beam body 32 and the third beam body 34 and the second beam body 33 and the third beam body 34 include, but are not limited to, bonding, welding, riveting, and fixedly connecting through fasteners. 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 difficulty of installation and disassembly of the middle beam 3.

[0084] When the first beam body 32, the second beam body 33 and the third beam body 34 are separately arranged, as shown in Fig. 10, the third beam body 34 is provided with a third mounting hole 341 and a fourth mounting hole 342, the first beam body 32 is fixedly installed at the third mounting hole 341 through fasteners, and the second beam body 33 is fixedly installed at the fourth mounting hole 342 through fasteners.

[0085] In a possible design, as shown in Fig. 10, the number of the third mounting hole 341 and the fourth mounting hole 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.

[0086] Fig. 11 is a schematic view of the structure of the middle beam in an embodiment. As shown in Fig. 11, in another possible design, at least two third mounting holes 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 holes 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 installation positions of the first beam body 32 and / or the second beam body 33 are adjustable, which can further increase the adjustable range of the optical axis distance of the near-eye display device, thereby further expanding the applicable population of the near-eye display device.

[0087] Fig. 12 is a schematic view of the structure of the middle beam in an embodiment. As shown in Fig. 12, the third beam body 34 can be provided with a mounting groove 343, and a part of the first beam body 32 and a part of the second beam body 33 are inserted into the mounting groove 343 and abut against the side wall of the mounting groove 343. In 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 mounting groove 343, thereby reducing the risk that the first beam body 32 and the second beam body 33 deviate during the movement and cause installation difficulties or even cannot be installed.

[0088] Fig. 13 is a schematic view of the connection structure between the display module and the middle beam in an embodiment. As shown in Fig. 13, the housing 24 of the display module 2 is provided with a first extension 241, and the middle beam 3 is provided with a limiting groove 35. Specifically, the limiting groove 35 can be arranged on two of the first beam body 32, the second beam body 33 and the third beam body 34, and the first extension 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 shown in Fig. 13, the first extension 241 extends along the third direction Z, and when the installation position of the display module 2 in the first direction X is adjusted, the first extension 241 can move in the limiting groove 35, and the first extension 241 can abut against the side wall of the limiting groove 35 in the first direction X to limit the movement distance of the display module 2 in the first direction X, and at the same time, with reference to Fig. 1, the risk of damage to the display module 2 or the mirror frame 1 caused by the contact between the display module 2 and the mirror frame 1 due to the large movement distance of the display module 2 is reduced.

[0089] Specifically, the first extension 241 and / or the side wall of the limiting groove 35 can be provided with a buffer (not shown in the figure), and in the first direction X, the first extension 241 and the side wall of the limiting groove 35 can indirectly contact through the buffer, so that the first extension 241 and the limiting groove 35 are in flexible contact, and the risk of damage to the first extension 241 or the limiting groove 35 caused by stress concentration when the first extension 241 abuts against the limiting groove 35 is reduced.

[0090] In addition, in the direction perpendicular to the extension direction of the first extension 241 and the first direction X, for example, as shown in Fig. 13, along the second direction Y, the first extension 241 is oppositely arranged on both sides of the housing 24, and the first extension 241 can abut against the side wall of the limiting groove 35 in the second direction Y. That is, the first extension 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 binocular optical axis fusion abnormality of the wearer caused by the different distances between the display module 2 and the left and right eyes of the wearer.

[0091] Fig. 14 is a schematic view of the connection structure between the display module and the middle beam in an embodiment. As shown in Fig. 14, along the extension direction of the first extension 241, for example, along the third direction Z, the side of the first extension 241 away from the housing 24 is provided with a second extension 242, and the second extension 242 and the first extension 241 are connected in 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 242 abuts against the side of the middle beam 3 away from the display module 2, that is, the housing 24 and the second extension 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 binocular optical axis fusion abnormality of the wearer caused by the height difference between the display module 2 and the left and right eyes of the wearer.

[0092] In addition, the first extension portion 241 can clamp the middle beam 3 in the second direction Y, and the shell 24 and the second extension portion 242 clamp the middle beam 3 in the third direction Z, which reduces the risk of swing of the display module 2 in a direction perpendicular to the first direction X. With reference to FIG. 9 simultaneously, the above structure reduces the risk of an included angle between the optical axes of the first display module 25 and the second display module 26, and even a large included angle. Generally, the included angle between the optical axes of the first display module 25 and the second display module 26 should be not greater than 0.2°, thereby reducing the risk of unclear virtual information imaging of the near-eye display device, and even binocular optical axis fusion abnormalities of the wearer, thereby improving the reliability of virtual information transmission and the accuracy of imaging of the near-eye display device, to improve the use experience of the wearer.

[0093] FIG. 15 is a partial structure schematic view of the display module connected with the frame when the display module is in the first gear. As shown in FIG. 15, a first sealing member 4 is filled in the gap between the display module 2 and the frame 1, and the first sealing member 4 and the display module 2 and the first sealing member 4 and the frame 1 are fixed by adhesive bonding. The first sealing member 4 is a sealing member such as silicone or rubber that has elastic deformation capability. At this time, the first sealing member 4 is compressed and deformed under the clamping action of the display module 2 and the frame 1 and has a springback force.

[0094] FIG. 16 is a partial structure schematic view of the display module connected with the frame when the display module is in the second gear. As shown in FIG. 16, when the display module is adjusted from the first gear shown in FIG. 15 to the second gear shown in FIG. 16, the gap between the display module 2 and the frame 1 is increased. At this time, the first sealing member 4 can recover the deformation under the action of the springback force thereof, so as to fill and seal the gap between the display module 2 and the frame 1 again, thereby improving the sealing between the display module 2 and the frame 1 and being beneficial to improving the waterproof and dustproof performance of the near-eye display device.

[0095] FIG. 17 is a partial structure schematic view of the near-eye display device in an embodiment. As shown in FIG. 17, in any of the above embodiments, the frame 1 can be provided with an operation hole 13. With reference to FIG. 9 simultaneously, the fastener for fixing the first display module 25 and the second display module 26 is exposed at the operation hole 13, that is, the wearer can directly perform dismounting, shifting, mounting and other operations on the first display module 25 and the second display module 26 at the operation hole 13, thereby reducing the adjustment difficulty of the optical axis distance of the near-eye display device. The operation hole 13 can 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, and the present embodiment does not specially limit the setting position of the operation hole 31. In FIG. 17, the operation hole 13 is taken as an example located at the bottom of the frame 1.

[0096] For example, the near-eye display device shown in FIG. 17 can be provided with sensors (not shown in the figure) inside the frame 1. The sensors can be used to detect the change in the position, distance, and other parameters of the display module 2, and transmit the change to the control module. The control module (not shown in the figure) can convert the change in the position, distance, and other parameters of the display module 2 into the actual value of the optical axis distance of the near-eye display device, and adjust the display parameters of the virtual information of the near-eye display device according to the actual value of the optical axis distance. The display parameters include but are not limited to brightness, size, imaging position, and distance from the wearer's eyes, etc., so that the wearer without the interpupillary distance parameter has consistent viewing effect. For example, the first hole position 311 and the second hole position 312 shown in FIG. 9 are both provided with sensors. When the display module 2 is installed at the first hole position 311 or the second hole position 312 through the fastener, the sensors can be blocked, and the sensors can determine that the display module 2 is at the first gear or the second gear, and transmit 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.

[0097] In a possible design, before the near-eye display device is shipped, the gears 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.

[0098] In another possible design, the gears, 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 matches 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 match the actual gear.

[0099] Figure 18 is a schematic diagram of the connection structure between the display module and the middle beam in an embodiment. As shown in Figure 18, the near-eye display device further comprises a flexible circuit board 5. One end of the flexible circuit board 5 passes through a through hole (not shown in the figure) in the first beam body 32 and is electrically connected with the first display module 25. The other end of the flexible circuit board 5 passes through a through hole (not shown in the figure) in the second beam body 33 and is electrically connected with the second display module 26. The flexible circuit board 5 is used to realize the transmission of signals between the optical machines of the display modules and other electronic components. The signals include but are not limited to image data, control signals, etc. Due to the flexible nature of the flexible circuit board 5, the flexible circuit board 5 can be arranged flexibly in a small space, thereby reducing the space occupied by the circuit of the near-eye display device and also reducing the complexity of the circuit of the near-eye display device, which is conducive to reducing the overall size of the near-eye display device, and at the same time, is conducive to improving the assembly efficiency of the near-eye display device and reducing the assembly difficulty. The same flexible circuit board 5 is connected with the optical machines of the first display module 25 and the second display module 26, which further reduces the complexity of the circuit of the near-eye display device.

[0100] Figure 19 is a schematic diagram of the connection structure of the flexible circuit board in an embodiment. As shown in Figure 19, the flexible circuit board 5 comprises a first connecting portion 51, a second connecting portion 52 and a third connecting portion 53. Referring to Figure 18 simultaneously, the first connecting portion 51 is used to connect with the optical machine of the first display module 25, the third connecting portion 53 is used to connect with the optical machine of the second display module 26, one end of the second connecting portion 52 is connected with the first connecting portion 51, and the other end of the second connecting portion 52 extends to the side of the middle beam 3 away from the display module 2 through the through hole in the first beam body 32 and then extends into the through hole in the second beam body 33 to be connected with the third connecting portion 53.

[0101] As shown in Figure 19, the second connecting portion 52 is partially bent to form a redundant portion 521. In the process of adjusting the distance between the optical axes of 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 allowance, thereby reducing the risk of the flexible circuit board 5 being pulled off, and further improving the working stability of the flexible circuit board 5 and the near-eye display device and prolonging the service life.

[0102] Figure 20 is a schematic diagram of the partial structure of the near-eye display device in an embodiment. As shown in Figure 20, the near-eye display device further comprises 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 with the display module 2. The knob 6 is used to adjust the focal length of the optical lens module, so that wearers with different vision can see clear information images, thereby making the near-eye display device cover people with different degrees of myopia, and making the near-eye display device compatible with a larger range of people. The specific structure and method of adjusting the focal length are not specially limited in the embodiments of the present application.

[0103] Fig. 21 is a schematic view of the structure of the knob in an embodiment. As shown in Fig. 21, the knob 6 comprises a head 61 and a rod body 62, the rod body 62 is used to be connected with the display module 2, and 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.

[0104] Fig. 22 is an enlarged view of the partial structure of the knob installed on the frame. As shown in Fig. 22, the frame 1 is provided with a groove 14, and referring to Fig. 21, at least part of the head 61 is exposed in the groove 14, and a hole 15 is arranged in the groove 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.

[0105] In the process of adjusting the focal length by the knob 6, the knob 6 will move relative to the frame 1, the hole 15 extends along the moving direction of the rod body 62, so as to reduce the risk that the hole 15 limits the movement of the rod body 62 and causes the knob 6 to fail to move, a second sealing member (not shown in the figure) is sleeved on the rod body 62, and the second sealing member can be arranged in the groove 14 or outside the hole 15, or arranged in the hole 15.

[0106] Fig. 23 is a sectional view of the structure of the second sealing member in an embodiment. As shown in Fig. 23, a first adhesive 631 is arranged on the outer side wall of the second sealing member 63, the second sealing member 63 and the side wall of the groove 14 or the hole 15 are fixedly connected through the first adhesive 631, a second adhesive 632 is arranged on the inner side wall of the second sealing member 63, and the second sealing member 63 and the rod body 63 are fixedly connected through the second adhesive 632. The second sealing member 63 is used to block the exposed hole 15, so as to improve the sealing performance between the knob 6 and the frame 1, and facilitate the improvement of the waterproof and dustproof performance of the near-eye display device.

[0107] The second sealing member 63 is a sealing member with elastic deformation capacity such as silica gel or rubber, when the knob 6 moves, the second sealing member 63 can be deformed by extrusion, so as to reduce the risk that the second sealing member 63 limits the movement of the rod body 62 and causes the knob 6 to fail to move. In addition, the second sealing member 63 has strong deformation capacity, when the knob 6 moves, one side of the second sealing member 63 is extruded and shrunk, and the other side is expanded, so that the rod body 62 and the hole 15, and the knob 6 and the groove 14 remain in a state of being filled and sealed by the second sealing member 63, that is, the strong deformation capacity makes the second sealing member 63 have good sealing effect, and reduces the risk that the movement of the knob 6 causes the sealing failure of the second sealing member 63.

[0108] In summary, the near-eye display device provided by the embodiments of the present application takes 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 step-adjusted or steplessly adjusted within 10 mm-16 mm, so that the coverage of the available population of the near-eye display device is not less than 95%, the application range of the near-eye display device is significantly improved, and meanwhile, the overall size and weight of the near-eye display device can be effectively reduced, so as to facilitate the storage, carrying and wearing of the near-eye display device.

[0109] The same or similar parts among various embodiments in the specification can be referred to each other.

Claims

1. A near-eye display device, comprising: The near-eye display device comprises: a frame; a display module mounted on the frame; a middle beam, the display module is connected with the middle beam, the middle beam is provided with a first mounting hole position, 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 located in a first gear position; when the display module is mounted on the second hole position, the display module is located in a second gear position.

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

3. The near-eye display device of claim 2, wherein, 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, 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 movement distance of the display module in the first direction.

4. The near-eye display device of claim 3, wherein, In the second direction, the first extension part is oppositely arranged on both sides of the display module; In the second direction, the first extension part 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 of claim 4, wherein, In the extension direction of the first extension part, the side of the first extension part away from the display module is connected with a second extension part, and the second extension part and the first extension part are connected in a V-shaped or L-shaped structure; In the third direction, the second extension part 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 of any one of claims 2-5, wherein, The middle beam further comprises a third beam body, and both ends of the third beam body are connected with the first beam body and the second beam body respectively; 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 of claim 6, wherein, In the first direction, the number of the third mounting hole position is at least two; And / or, in the first direction, the number of the fourth mounting hole position is at least two.

8. The near-eye display device of claim 6, wherein, The third beam body is provided with a mounting groove, part of the first beam body is located in the mounting groove and abuts against the side wall of the mounting groove, and 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 of any one of claims 2-5, wherein, The near-eye display device comprises a flexible circuit board, the flexible circuit board comprises a first connecting part, a second connecting part and a third connecting part, the first connecting part is connected with the first display module, the third connecting part is connected with the second display module, and both ends of the second connecting part are connected with the first connecting part and the second connecting part respectively; The second connecting part is provided with a redundancy part.

10. The near-eye display device of any one of claims 1-5, wherein, The near-eye display device further comprises a knob, one end of the knob is connected with the display module, the other end of the knob extends to outside the frame and is exposed, and the knob is used for adjusting the focal length of the display module.

11. The near-eye display device of claim 10, wherein, The knob comprises a head and a rod body, the frame is provided with a groove, at least part of the head is exposed in the groove, the groove is provided with a hole, one end of the rod body is connected with the head, and the other end of the rod body extends to the frame through the hole and is connected with the display module. The near-eye display device further comprises a second sealing member, the second sealing member is sleeved on the rod body, and the second sealing member is used for sealing the hole.

12. The near-eye display device of any one of claims 1-5, wherein, The near-eye display device further comprises a first sealing member, the first sealing member is located between the display module and the frame, and the first sealing member is used for sealing the gap between the display module and the frame.

13. The near-eye display device of any one of claims 1-5, wherein, The near-eye display device further comprises a sensor and a control module, the sensor is electrically connected or signal-connected with the control module. The sensor is a position sensor, the position sensor is used for detecting the position of the display module, or the sensor is a distance sensor, the distance sensor is used for detecting the distance change value of the display module. The control module is used for adjusting the display parameter of the near-eye display device according to the detection result of the sensor.

Images