Head-mounted display device

Abstract

A head-mounted display device (1) includes a housing (11) having an appearance side (A), a light emitting member (13), and a light guide plate (14), the housing (11) having a cavity (a) and an opening (b) communicating with the cavity (a), the opening (b) being located on the appearance side (A). The light-emitting part (13) is arranged in the cavity (a). The light guide plate (14) is connected to the opening (b) and matched with the opening (b), the light guide plate (14) is provided with a light inlet face (141) and a light outlet face (142), the light inlet face (141) faces the light emitting part (13), and light emitted from the light outlet face (142) can be emitted out of the cavity (a).

Description

Head-mounted display device TECHNICAL FIELD

[0001] The present application relates to the field of display technology, and in particular to a head-mounted display device. BACKGROUND

[0002] With the development of science and technology, head-mounted display devices, as a new technology product, are increasingly widely used in people's daily life. Among them, the head-mounted display device can include flight glasses, augmented reality (AR) glasses or virtual reality (VR) glasses, etc.

[0003] In the related art, the head-mounted display device is generally provided with an indicator light. Due to the limited volume of the head-mounted display device, the indicator light is generally in the form of a lamp bead or a lamp column, and the different light-emitting states of the lamp bead or the lamp column are used to prompt the user to know the working mode of the head-mounted display device.

[0004] However, the light-emitting effect provided by the lamp bead or the lamp column is poor, and therefore the visual experience of the user is poor.

[0005] SUMMARY

[0006] The present application provides a head-mounted display device for improving the visual experience of the light emitted by the indicator light to the user.

[0007] The technical scheme of the present application is implemented as follows:

[0008] The present application provides a head-mounted display device, comprising:

[0009] A shell, a light-emitting piece and a light guide plate, the shell has an appearance side, the shell has a cavity and an opening communicating with the cavity, the opening is located on the appearance side. The light-emitting piece is arranged in the cavity. The light guide plate is connected at the opening and matches the opening, the light guide plate has an incident light surface and an exit light surface, the incident light surface faces the light-emitting piece, and the light emitted from the exit light surface can be emitted outside the cavity.

[0010] In the head-mounted display device provided by the present application, the light-emitting piece is located in the cavity, the light guide plate is located at the opening communicating with the cavity and matches the opening, and the incident light surface faces the light-emitting piece. Therefore, the light emitted by the light-emitting piece can enter the light guide plate through the incident light surface and then be emitted from the exit light surface to the outside of the cavity. In this way, the outside personnel can observe the light and determine the working state of the head-mounted display device according to the state change of the light. In addition, the light emitted by the light-emitting piece also has a certain decorative effect, which improves the appearance technology and aesthetic degree of the head-mounted display device.

[0011] And because the refractive index of the light guide plate is different from the refractive index of air, the light will refract when passing through the light-in surface, the refracted light enters the inside of the light guide plate, will again refract at the light-out surface, and then be emitted to the outside of the cavity. In addition, a part of the light will be reflected at the light-out surface, and then be transmitted in the inside of the light guide plate and emitted to the light-in surface. The light will be reflected again at the light-in surface, and then be emitted to the light-out surface again, and finally be emitted. Under the continuous refraction and reflection of the light, the light emitted from the light guide plate will be more uniform, so that a better display effect can be achieved, thereby improving the visual experience.

[0012] In some embodiments of the present application, the head-mounted display device further comprises a touch unit arranged on the shell and located on the appearance side, and the touch unit is electrically connected with the controller of the head-mounted display device.

[0013] In this way, the presence of the touch unit can facilitate the user to operate and control the head-mounted display device, thereby improving the convenience of operation.

[0014] In some embodiments of the present application, the opening and the light guide plate are arranged around the light emitting member, the light-in surface is located on the inside of the light guide plate, and the light-in surface and the light-out surface are oppositely arranged.

[0015] In this way, after the light enters the inside of the light guide plate through the light-in surface, a part of the light reflected at the light-out surface will enter the inside of the light guide plate again, and then be emitted through the light-in surface and the light-out surface on the other side. Alternatively, a part of the light reflected at the light-out surface will be emitted to the light-in surface in the inside of the light guide plate, and then be reflected to the light-out surface again, and then be emitted. In this way, not only the loss of light can be reduced, but also the uniformity of light emission can be further improved.

[0016] In some embodiments of the present application, the shell further has a head-wearing side opposite to the appearance side. In the direction of the appearance side from the head-wearing side, the first end of the light-out surface and the second end of the light-out surface are arranged in sequence. In the direction of the first end of the light-out surface pointing to the second end of the light-out surface, the light-out surface extends in the direction close to the central axis of the light guide plate.

[0017] In this way, the light-out surface is an inclined surface away from the head-wearing side. In this way, when a person other than the wearer looks at the head-mounted display device from the appearance side, the light emitting surface can be better seen, thereby improving the visual experience.

[0018] In some embodiments of the present application, a plurality of optical dot structures are arranged on the light-in surface, and the optical dot structures are used to refract the light emitted by the light emitting member to enter the inside of the light guide plate.

[0019] Thus, the light can be refracted on the surface of the optical dot structure, the probability of light refraction can be improved, the light entering the light guide plate is more dispersed and uniform, and better display effect and visual experience can be achieved.

[0020] In some embodiments of the present application, the optical dot structure comprises a protruding part, and the cross section of the protruding part gradually decreases in the direction away from the light-incident surface.

[0021] Thus, more light can enter the interior of the protruding part through the side surface of the protruding part, and then enter the interior of the light guide plate. In the interior of the light guide plate, part of the light is directly emitted through the light-emitting surface, and another part of the light is reflected at the light-emitting surface, and then is emitted to the light-incident surface and is reflected at the light-incident surface again, and then is emitted to the outside of the light guide plate. Since the side surface of the protruding part is inclined, the probability of light refraction can be increased, the refraction angle of the light is more diverse, the reflection angle of the light reflected at the light-emitting surface and the light-incident surface is more diverse, the light can be more uniformly distributed in the light guide plate, and thus the emitted light is more uniform, the light uniformity can be improved, and the visual experience can be enhanced.

[0022] In some embodiments of the present application, the plurality of optical dot structures are sequentially arranged around the light-emitting element, and / or the optical dot structure extends in the direction from the first end of the light-incident surface to the second end of the light-incident surface.

[0023] Thus, in the circumferential direction of the light guide plate, the light emitted by the light-emitting element has a higher probability of contacting the optical dot structure, and / or in the direction from the first end of the light-incident surface to the second end of the light-incident surface, the light emitted by the light-emitting element has a higher probability of contacting the optical dot structure. Thus, the probability of light contacting the optical dot structure can be increased, the probability of light refraction can be increased, the diversity of the reflection angle of the light reflected at the light-emitting surface and the light-incident surface can be increased, the light entering the light guide plate is more uniform, better light emission effect can be achieved, and better visual experience can be provided.

[0024] In some embodiments of the present application, the light-incident surface extends in the direction perpendicular to the cross section of the light guide plate, and the light-emitting element and the light guide plate are located in the same plane.

[0025] In this way, when the light is reflected at the light-emitting surface, the reflected light has a higher probability of entering the light guide plate from the light-incident surface on the other side. Thus, the utilization rate of the light can be improved to a greater extent, the uniformity of light emission of the light guide plate can be improved, and the visual experience can be improved.

[0026] In some embodiments of the present application, the head-mounted display device further comprises a light-reflecting film, the light-reflecting film is arranged in the cavity, and the light-emitting piece is provided with the light-reflecting film on both sides in a direction perpendicular to the cross section of the light guide plate, the outer contour of the light-reflecting films on both sides of the light-emitting piece forms a light outlet, and the light inlet surface is arranged at the light outlet.

[0027] By arranging the light-reflecting film, light loss caused by scattering can be avoided, light utilization can be improved, and light brightness can be ensured.

[0028] In some embodiments of the present application, the light-emitting piece comprises a plurality of lamp beads, and the plurality of lamp beads are arranged along the circumference of the light guide plate.

[0029] In this way, the arrangement direction of the plurality of lamp beads is consistent with the circumference of the light guide plate, so that light can enter the light inlet surface more uniformly along the circumference of the light guide plate, thereby ensuring the uniformity of light emission of the light guide plate as a whole and improving the visual experience.

[0030] In some embodiments of the present application, the head-mounted display device further comprises an adapter plate, the adapter plate is arranged in the cavity and is used for electrical connection with the controller of the head-mounted display device, the adapter plate is located between the light-reflecting film and the wall surface of the cavity, the lamp beads are arranged on the side of the adapter plate close to the light-reflecting film and are electrically connected with the adapter plate, and the lamp beads pass through the light-reflecting film on the side where the adapter plate is located to extend into the light-reflecting film between the lamp beads.

[0031] In this way, the adapter plate can provide support for the plurality of lamp beads, and at the same time, the line connection between the lamp beads and the controller can be simplified, thereby facilitating installation and maintenance.

[0032] In some embodiments of the present application, the head-mounted display device further comprises a reinforcing piece arranged in the cavity, and the adapter plate abuts between the light-reflecting film and the reinforcing piece.

[0033] In this way, the reinforcing piece can provide support for the adapter plate, so that deformation of the adapter plate can be avoided, thereby ensuring the stability of the lamp beads arranged on the adapter plate and further ensuring the stability of light emission and improving the visual experience.

[0034] In some embodiments of the present application, the shell comprises a body and a light-shielding cover plate, the body has an appearance side, the light-shielding cover plate is located on the appearance side of the body and is connected with the body, the light-shielding cover plate and the body are arranged in a spaced manner in a direction perpendicular to the cross section of the light guide plate to form an opening, and the gap between the body and the light-shielding cover plate forms the cavity.

[0035] Since the shell is arranged as two parts of the body and the light-shielding cover plate, the installation of the light-emitting piece, the light-reflecting film and other structures inside the cavity can be facilitated.

[0036] In some embodiments of the present application, the touch unit is located between the light-shielding cover plate and the body.

[0037] In this way, the light shielding cover can protect the touch unit to avoid damage to the touch unit.

[0038] In some embodiments of the present application, the light guide plate further comprises a first connecting surface and a second connecting surface arranged oppositely in a direction perpendicular to the cross section of the light guide plate, and the first connecting surface faces away from the body, and the light shielding cover covers the first connecting surface.

[0039] In this way, light entering the inside of the light guide plate can be prevented from being emitted from the first connecting surface, and light leakage can be avoided to improve the visual experience.

[0040] In some embodiments of the present application, the light guide plate is provided with a first limiting member arranged circumferentially thereon, and the light shielding cover is provided with a second limiting member, and the first limiting member and the second limiting member are connected in cooperation to limit the movement of the light shielding cover relative to the light guide plate.

[0041] By arranging the first limiting member and the second limiting member, the first limiting member and the second limiting member are used in cooperation to limit the movement of the light shielding cover relative to the light guide plate, so as to fix the light guide plate and the light shielding cover.

[0042] In some embodiments of the present application, the light guide plate and the light shielding cover are integrally formed.

[0043] By processing the light guide plate and the light shielding cover into an integral structure, the structural strength of the light guide plate and the light shielding cover as a whole can be improved, and the light guide plate and the light shielding cover can be processed at one time without the need for secondary processing, thereby reducing the processing procedures.

[0044] In some embodiments of the present application, the body comprises a base and a decorative plate, the base has an appearance side, and a gap between the light shielding cover and the base forms a cavity; the decorative plate is located on the appearance side of the base and is arranged around the light emitting member, the decorative plate is located on the side of the light guide plate away from the light emitting member, and the decorative plate and the light shielding cover form an opening.

[0045] In this way, the base can be used to carry the light emitting member, the light guide plate and other components, and the decorative plate can decorate the base, thereby ensuring the overall aesthetics of the head-mounted display device.

[0046] In some embodiments of the present application, the opening and the light emitting member extend around the light emitting member for one turn.

[0047] In this way, the opening and the light guide plate are both annular structures, so part of the light reflected at the light emitting surface can re-enter the inside of the light guide plate and pass through the light incident surface and the light emitting surface on the other side again, or part of the light reflected at the light emitting surface can be directed to the light incident surface inside the light guide plate and be reflected to the light emitting surface again, and then be emitted. In this way, the loss of light can be minimized, and the uniformity of light emission can be further improved.

[0048] In some embodiments of the present application, the touch unit is configured to receive an operation instruction; and in response to the operation instruction, the light emitting component is switched to a corresponding light emitting state.

[0049] In this way, the user can issue an operation instruction to the touch unit, and the light emitting component can be switched to a corresponding light emitting state after the touch unit receives the operation instruction, thereby prompting the user.

[0050] In some embodiments of the present application, the touch unit is configured to receive an operation instruction; and in response to the operation instruction, the controller is configured to control the head-mounted display device to switch a working state.

[0051] In this way, the user can issue an operation instruction to the touch unit, and the controller can control the head-mounted display device to switch a working state after the touch unit receives the operation instruction, thereby facilitating operation.

[0052] In some embodiments of the present application, the touch unit is configured to receive an operation instruction;

[0053] The controller is configured to respond to the operation instruction to retrieve a first state instruction, and based on the first state instruction, the controller controls the head-mounted display device to switch a working state.

[0054] Based on the working state of the head-mounted display device, the controller controls the light emitting component to switch to a light emitting state corresponding to the working state.

[0055] In this way, the user can issue an operation instruction to the touch unit, and the controller will retrieve a first state instruction and control the head-mounted display device to switch a working state based on the first state instruction after the touch unit receives the operation instruction, and the controller can control the light emitting component to switch to a light emitting state corresponding to the working state based on the working state. In this way, the light emitting state and the working state can be corresponded, thereby prompting the user. BRIEF DESCRIPTION OF DRAWINGS

[0056] FIG. 1 is a partial exploded schematic view of a head-mounted display device according to some embodiments of the present application;

[0057] FIG. 2 is a partial cross-sectional schematic view of a head-mounted display device according to some embodiments of the present application;

[0058] FIG. 3 is a light path schematic view of a light guide plate and a light emitting component according to some embodiments of the present application;

[0059] FIG. 4 is a partial enlarged schematic view of A in FIG. 3;

[0060] FIG. 5 is a partial enlarged schematic view of B in FIG. 3;

[0061] FIG. 6 is a cross-sectional schematic view of a light guide plate and a light emitting component according to some embodiments of the present application;

[0062] FIG. 7 is another cross-sectional view of a light guide plate and a light emitting element according to some embodiments of the present application;

[0063] FIG. 8 is yet another cross-sectional view of a light guide plate and a light emitting element according to some embodiments of the present application;

[0064] FIG. 9 is still another cross-sectional view of a light guide plate and a light emitting element according to some embodiments of the present application;

[0065] FIG. 10 is an external structure diagram of a light guide plate and an optical dot structure according to some embodiments of the present application;

[0066] FIG. 11 is a cross-sectional view of FIG. 10;

[0067] FIG. 12 is a light path diagram of a light guide plate, an optical dot structure and a light emitting element according to some embodiments of the present application;

[0068] FIG. 13 is an enlarged view of a portion of FIG. 12;

[0069] FIG. 14 is an enlarged view of a portion of FIG. 11;

[0070] FIG. 15 is a cross-sectional view of a light guide plate, a light emitting element, an optical dot and a reflective film according to some embodiments of the present application;

[0071] FIG. 16 is another cross-sectional view of a light guide plate, a light emitting element, an optical dot and a reflective film according to some embodiments of the present application;

[0072] FIG. 17 is yet another cross-sectional view of a light guide plate, a light emitting element, an optical dot and a reflective film according to some embodiments of the present application;

[0073] FIG. 18 is a flow diagram of a control method of a head-mounted display device according to some embodiments of the present application;

[0074] FIG. 19 is another flow diagram of a control method of a head-mounted display device according to some embodiments of the present application;

[0075] FIG. 20 is yet another flow diagram of a control method of a head-mounted display device according to some embodiments of the present application.

[0076] Explanation of reference signs: 1-head-mounted display device; 11-housing; 111-body; 1111-base body; 1112-decorative plate; 112-shading cover plate; a-cavity; b-opening; 12-display lens; A-outer appearance side; B-head-wearing side; 13-light-emitting piece; 131-lamp bead; 14-light guide plate; 141-light-incident surface; 142-light-emitting surface; 143-first connecting surface; 144-second connecting surface; 15-optical dot structure; 16-reflective film; 161-first reflective film; 162-second reflective film; 17-adapter plate; 18-stiffener; 19-controller; 20-adapter flexible circuit board; 21-first limiting piece; 22-second limiting piece; 23-third limiting piece; 24-fourth limiting piece; 25-touch unit. DETAILED DESCRIPTION

[0077] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0078] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "include" and "have" and any variations thereof in the specification and the claims and the above description of the drawings are intended to cover the non-exclusive inclusion.

[0079] In the description of the embodiments of the present application, the technical terms "first", "second", "third" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0080] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0081] In the description of the embodiments of the present application, the term "and / or" is only a description of 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 the "or" relationship between the front and rear associated objects.

[0082] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0083] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0084] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0085] The following is a detailed description of this application.

[0086] With the development of technology, head-mounted display devices are becoming increasingly widely used in people's daily lives as a new type of technological product.

[0087] For example, head-mounted display devices can include flight goggles, augmented reality (AR) glasses, or virtual reality (VR) glasses, etc.

[0088] Furthermore, the shape of the head-mounted display device can be glasses-style, helmet-style, or hanging-style, depending on the requirements. For ease of understanding and illustration, this application uses glasses-style head-mounted display devices as an example in the accompanying drawings.

[0089] Based on this, as shown in FIG. 1 and FIG. 2, the present application provides a head-mounted display device 1, which comprises a shell 11 and a display lens 12 (as an outer screen), the shell 11 has an appearance side A and a head-mounted side B arranged oppositely, a wearer can watch the picture displayed on the head-mounted display device 1 from the head-mounted side B of the shell 11, the shell 11 has a mounting space for accommodating the display lens 12, and the display lens 12 is located on the appearance side A. People other than the wearer can watch the display lens 12 on the appearance side A, the display lens A can display the content being watched by the wearer, and the display lens 12 can also be customized to display parameters such as battery power and personalized icons.

[0090] It can be understood that the appearance side A refers to the side of the head-mounted display device 1 that can be seen by people other than the wearer when the wearer wears the head-mounted display device 1. The head-mounted side B refers to the side where the head of the wearer is located when the wearer wears the head-mounted display device 1.

[0091] It should be explained that the shell 11 shown in FIG. 1 is only a part of the total shell, which comprises the shell 11 and another part of the rear shell located on the head-mounted side B of the shell 11, and the rear shell can be buckled with the shell 11 to form the total shell.

[0092] In addition, the head-mounted display device 1 can be monocular or binocular, which can be set according to requirements.

[0093] During the operation of the head-mounted display device 1, some mode conversion will be involved. For example, when the head-mounted display device 1 is an AR glasses, the AR glasses can be switched between 2D video mode, 3D video mode and panoramic 360° video mode.

[0094] Based on this mode conversion, in the related art, some head-mounted display devices 1 are also provided with indicator lights. Due to the limited volume of the head-mounted display device, the indicator light is generally in the form of a lamp bead or a lamp column, and different display states of the indicator light correspond to different modes, so that the user can clearly understand the mode of the head-mounted display device 1.

[0095] However, the light-emitting effect provided by the above lamp bead or lamp column is poor, and the visual experience of people is poor.

[0096] Based on this, as shown in FIG. 1 and FIG. 2, in some embodiments, the head-mounted display device 1 provided by the present application has a cavity a and an opening b in communication with the cavity a, the opening b is located on the appearance side A. The head-mounted display device 1 further comprises a light emitting piece 13 and a light guide plate 14, the light emitting piece 13 is arranged in the cavity a. The light guide plate 14 is connected to the opening b and matches the opening b, the light guide plate 14 has an incident light surface 141 and an exit light surface 142, the incident light surface 141 is towards the light emitting piece 13, and the light emitted from the exit light surface 142 can be emitted to the outside of the cavity a.

[0097] It can be understood that the installation space and the cavity a should not affect each other.

[0098] In some examples, the shape of the cavity a can be a regular cubic space or a spherical space.

[0099] Of course, the shape of the cavity a can also be an irregular three-dimensional space.

[0100] In some examples, the opening b is only to ensure that the light emitted by the light emitting piece 13 can be emitted to the outside of the cavity a, and the shape of the opening b is not limited, for example, the shape of the opening b can be a regular shape such as a circle, a ring or a polygon, or it can also be an irregular shape.

[0101] In some examples, the light guide plate 14 is connected to the opening b and matches the opening b, which can be that the light guide plate 14 is at least partially arranged in the opening b and fills to block the opening b, and is connected with the shell 11, the incident light surface 141 and the exit light surface 142 are respectively located on the opposite sides of the plane where the opening b is located. In this way, the light emitted by the light emitting piece 13 can enter the inside of the light guide plate 14 through the incident light surface 141, and then be emitted to the outside of the cavity a through the exit light surface 142. And the inner wall of the opening b can block the non-exit light surface of the light guide plate 14, so as to reduce light leakage, improve the utilization rate of light and improve the visual experience.

[0102] In other examples, the light guide plate 14 is connected to the opening b and matches the opening b, which can also be that the light guide plate 14 is arranged outside the opening b and is connected with the shell 11, the incident light surface 141 directly faces and covers to block the opening b, so that the light emitted by the light emitting piece 13 can pass through the opening b and be emitted to the incident light surface 141, and then enter the inside of the light guide plate 14 and then be emitted from the exit light surface 142.

[0103] In this case, the exit light surface 142 can be arranged opposite to the incident light surface 141, or the exit light surface 142 and the incident light surface 141 can also be arranged adjacent, which can be arranged according to the needs.

[0104] In some examples, the light guide plate 14 is connected to the opening b and matches the opening b. In other examples, the light guide plate 14 is arranged in the cavity a and connected to the shell 11, and the light exit surface 142 is opposite to and covers the opening b. In this way, the light emitted by the light emitting member 13 is emitted to the light entrance surface 141, then enters the light guide plate 14, and is emitted through the light exit surface 142 and the opening b.

[0105] In this case, the light exit surface 142 can be arranged opposite to the light entrance surface 141, or the light exit surface 142 and the light entrance surface 141 can be arranged adjacent to each other, which can be arranged according to requirements.

[0106] In some examples, a plurality of optical dot structures 15 can be arranged on the light entrance surface 141, and the optical dot structures 15 can be protrusions or recesses. In this way, the light is refracted to different degrees when passing through the surface of the optical dot structure 15, then enters the light guide plate 14, and a part of the light is directly emitted through the light exit surface 142, and another part of the light is reflected at the light exit surface 142, emitted to the light entrance surface 141, then reflected at the light entrance surface 141, and emitted to the light exit surface 142 again, and finally emitted. Since the optical dot structure 15 increases the angle type of light refraction, the angle type of light reflection at the light entrance surface 141 and the light exit surface 142 is also increased, which can further improve the uniformity of the light, enhance the display effect, and improve the visual experience.

[0107] It can be understood that the reflection of the light at the light entrance surface 141 and the light exit surface 142 after the light enters the light guide plate 14 can be total reflection or partial reflection.

[0108] In some examples, the light emitting member 13 can include one lamp bead 131. Or a plurality of lamp beads 131, for example, two, three, four, five or more.

[0109] For example, the lamp bead 131 can include a light emitting diode (LED) or a cold cathode fluorescent lamp (CCFL), which can be selected according to requirements.

[0110] For example, the light emitting member 13 includes a single-color light emitting form, and the light emitted by the light emitting member 13 can be any color, for example, any one of white, red, blue, yellow or purple.

[0111] Exemplarily, the light emitting member 13 comprises a mixed-color light emitting form, and the light emitted by the light emitting member 13 can be any combination of different colors. For example, the light emitting member 13 comprises a plurality of lamp beads 131, and the light emitted by the light emitting member 13 can be any combination of two or more of white, red, blue, yellow, or purple.

[0112] Through the above arrangement, since the light emitting member 13 is located in the cavity a, the light guide plate 14 is located at the opening b in communication with the cavity a and matches the opening b, and the light-incident surface 141 faces the light emitting member 13, therefore, the light emitted by the light emitting member 13 can enter the light guide plate 14 through the light-incident surface 141, and then be emitted from the light-emitting surface 142 to the outside of the cavity a, so that the external personnel can observe the light, and according to the state change of the light, the working state of the head-mounted display device 1 can be judged. In addition, the light emitted by the light emitting member 13 also has a certain decorative effect, which improves the appearance of the head-mounted display device 1 and the appearance of the head-mounted display device 1.

[0113] And since the refractive index of the light guide plate 14 is different from the refractive index of the air, the light will refract when passing through the light-incident surface 141, the refracted light enters the inside of the light guide plate 14, and will refract again at the light-emitting surface 142, and then be emitted to the outside of the cavity a, in addition, a part of the light will be reflected at the light-emitting surface 142, and then be conducted in the inside of the light guide plate 14 and emitted to the light-incident surface 141, and then be reflected again at the light-incident surface 141, and then be emitted to the light-emitting surface 142 again, and finally be emitted. Under the continuous refraction and reflection of the light, the light emitted from the light guide plate 14 will be more uniform, so that a better display effect can be achieved, thereby improving the visual experience.

[0114] The shape of the light guide plate 14 and the positional relationship between the light guide plate 14 and the light emitting member 13 will affect the light uniformity effect and light utilization rate of the light guide plate 14, which will be introduced in combination with specific embodiments.

[0115] In some embodiments, as shown in FIG. 1 and FIG. 2, the opening b and the light guide plate 14 are both arranged around the light emitting member 13, the light-incident surface 141 is located on the inside of the light guide plate 14, and the light-incident surface 141 and the light-emitting surface 142 are oppositely arranged.

[0116] It can be understood that since the light guide plate 14 is arranged around the light emitting member 13, the inside of the light guide plate 14 refers to the inside of the surrounding structure formed by the light guide plate 14.

[0117] It should be explained that the surrounding structure can be closed or not closed, and the shape of the surrounding structure can be any closed or not closed geometric shape such as a circle, a semicircle, a rectangle, a circular arc, a not closed polygon, etc.

[0118] For the opening b of the surrounding structure, in some examples, the opening b can be arranged around the light emitting member 13 in a manner that the opening b extends around the light emitting member 13 for one round.

[0119] For example, the opening b can be arranged around the light emitting member 13 in a manner that the opening b extends around the light emitting member 13 for one round.

[0120] Alternatively, the opening b can be arranged around the light emitting member 13 in a manner that the opening b includes a plurality of sub-openings, and the plurality of sub-openings are arranged around the light emitting member 13 at intervals for one round.

[0121] In other examples, the opening b can be arranged around the light emitting member 13 in a manner that the opening b extends around the light emitting member 13 for a segment, and does not form a closed structure.

[0122] For the light guide plate 14 of the surrounding structure, in some examples, the light guide plate 14 can be arranged around the light emitting member 13 in a manner that the light guide plate 14 extends around the light emitting member 13 for one round.

[0123] For example, the light guide plate 14 can be arranged around the light emitting member 13 in a manner that the light guide plate 14 extends around the light emitting member 13 for one round.

[0124] Alternatively, the light guide plate 14 can be arranged around the light emitting member 13 in a manner that the light guide plate 14 includes a plurality of light guide portions, and the plurality of light guide portions are arranged around the light emitting member 13 at intervals or in close proximity for one round.

[0125] It can be understood that, in the case where the light guide plate 14 includes the plurality of light guide portions, the opening b includes a plurality of sub-openings, and the plurality of sub-openings are arranged around the light emitting member 13 at intervals for one round, the plurality of sub-openings are arranged corresponding to the plurality of light guide portions, and the sub-openings match the light guide portions.

[0126] In other examples, the light guide plate 14 can be arranged around the light emitting member 13 in a manner that the light guide plate 14 extends around the light emitting member 13 for a segment, and does not form a closed surrounding structure, but forms a semi-enclosed surrounding structure.

[0127] In this case, in some examples, in the direction perpendicular to the cross section of the light guide plate 14, the light guide plate 14 of the non-closed surrounding structure can include an arc segment, or can include a plurality of straight line segments connected in sequence along the circumference of the light guide plate 14, or can include at least one straight line segment and at least one arc segment connected in sequence along the circumference of the light guide plate 14.

[0128] It needs to be explained that, in the case where the light guide plate 14 is of a surrounding structure, in the process of light rays exiting the light guide plate 14, the light rays can exit in various forms, as shown in FIGS. 3-5. The following will be described by taking the light guide plate 14 as a circular ring structure as an example.

[0129] The first kind, the light directly passes through the light guide plate 14 along a straight line, and the light exit direction is consistent with the diameter direction of the circular ring structure.

[0130] The second kind, the light is refracted at the light-in surface 141 and the light-out surface 142, and finally exits.

[0131] The third kind, as shown in FIG. 4, the light is refracted at the light-in surface 141 and reflected at the light-out surface 142. The reflected light enters the inside of the light guide plate 14 from one side of the light-in surface 141, and continues to the other side of the light-in surface 141. Then the second kind of exit occurs again, and finally exits. Thus, based on the setting of the surrounding structure of the light guide plate 14, not only can the light loss be reduced, but also the light-out can be more uniform.

[0132] The fourth kind, as shown in FIG. 5, the light is refracted at the light-in surface 141 and reflected at the light-out surface 142. The reflected light conducts inside the light guide plate 14 and is incident on the light-in surface 141. Then the light is reflected again at the light-in surface 141 and is incident on the light-out surface 142, and finally exits.

[0133] As for the position of the light emitting element 13, in some examples, as shown in FIG. 6, the light guide plate 14 is arranged around the light emitting element 13, and in the direction perpendicular to the cross section of the light guide plate 14 (the vertical direction in FIG. 6), the light emitting element 13 is at least partially located within the range of the light-in surface 141. In this way, the light emitted by the light emitting element 13 can better illuminate the light-in surface 141, and then be emitted through the light-out surface 142, which can reduce light loss and improve light utilization. In addition, in this way, in the direction perpendicular to the cross section of the light guide plate 14, the thickness of the head-mounted display device 1 can be reduced, and the uniformity of the light-out can be achieved in a narrow space.

[0134] In other examples, as shown in FIG. 7, the light guide plate 14 is also arranged around the light emitting element 13, and in the direction perpendicular to the cross section of the light guide plate 14, the light emitting element 13 is misaligned with the light guide plate 14. In this way, only the light-in surface 141 needs to be arranged in an inclined state to meet the requirement that the light-in surface 141 faces the light emitting element 13, and the light can also be incident on the light-in surface 141.

[0135] Through the above arrangement, since the light-in surface 141 is located inside the surrounding structure of the light guide plate 14, the light emitted by the light emitting element 13 can be incident on the light-in surface 141 around, and then enter the inside of the light guide plate 14, and finally be emitted through the light-out surface 142, thereby achieving the display effect.

[0136] And since the light guide plate 14 is a ring structure, part of the light reflected at the light exit surface 142 will re-enter the inside of the light guide plate 14 and re-exit through the light entrance surface 141 and the light exit surface 142 on the other side, or part of the light reflected at the light exit surface 142 will be internally reflected to the light entrance surface 141 and re-exit through the light exit surface 142. In this way, not only can the loss of light be reduced, but the uniformity of the light exit can also be improved to enhance the display effect and improve the visual experience.

[0137] In some embodiments, the opening b and the light guide plate 14 both extend around the light emitting member 13.

[0138] In some examples, as shown in FIG. 7, the light guide plate 14 not only includes the oppositely arranged light entrance surface 141 and light exit surface 142, but also includes a first connecting surface 143 and a second connecting surface 144. The first connecting surface 143 and the second connecting surface 144 are arranged in sequence in the direction from the outer light side A to the head-mounted side B, the first connecting surface 143 is located between the light entrance surface 141 and the light exit surface 142, and the opposite two edges of the first connecting surface 143 are connected to the light entrance surface 141 and the light exit surface 142 on the same side, respectively. The second connecting surface 144 is located between the light entrance surface 141 and the light exit surface 142, and the opposite two edges of the second connecting surface 144 are connected to the light entrance surface 141 and the light exit surface 142 on the same side, respectively. In this way, the light guide plate 14 is a ring-shaped plate with four surfaces, which is relatively convenient to process.

[0139] Exemplarily, the first connecting surface 143 can be a flat surface, or can also be a concave-convex surface.

[0140] Exemplarily, the second connecting surface 144 can be a flat surface, or can also be a concave-convex surface.

[0141] In some examples, when the head-mounted display device 1 is in the form of glasses, the display lens 12 and the light guide plate 14 are arranged side by side. In this way, the display lens 12 is responsible for displaying the content seen by the wearer, so that the person wearing the head-mounted display device 1 can understand the picture seen by the wearer, and the light guide plate 14 and the light emitting member 13 cooperate to provide light prompting. In this way, the overall appearance and technology level of the head-mounted display device 1 can be improved.

[0142] And in this case, the radial size of the display lens 12 and the radial size of the light guide plate 14 can be made close to each other, so that the overall head-mounted display device 1 is more coordinated and more beautiful.

[0143] In some examples, the light guide plate 14 can be a regular closed ring structure such as a circle, a square, or an ellipse, so that the processing and installation of the light guide plate 14 can be facilitated.

[0144] In other examples, the light guide plate 14 can also be an irregular closed ring structure.

[0145] Through the above arrangement, the opening b is a closed ring structure, and the corresponding light guide plate 14 is also a closed ring structure. Since the light-incident surface 141 is located on the inner side of the ring structure of the light guide plate 14, the light emitted by the light-emitting part 13 can be directed to the light-incident surface 141 around, and then enter the inside of the light guide plate 14, and finally be emitted through the light-emitting surface 142, thereby realizing the display effect.

[0146] Since the light guide plate 14 is a closed ring structure, part of the light reflected at the light-emitting surface 142 will re-enter the inside of the light guide plate 14 and pass through the light-incident surface 141 and the light-emitting surface 142 on the other side again, or part of the light reflected at the light-emitting surface 142 will be directed to the light-incident surface 141 inside the light guide plate 14 and be reflected to the light-emitting surface 142 again, and then be emitted. In this way, the loss of light can be minimized, and the uniformity of light emission can be further improved to enhance the display effect and improve the visual experience.

[0147] In some embodiments, as shown in FIG. 8, the shell 11 also has a head-wearing side B opposite the appearance side A. In the direction in which the head-wearing side B points to the appearance side A, the first end of the light-emitting surface 142 and the second end of the light-emitting surface 142 are arranged in sequence, and in the direction in which the first end of the light-emitting surface 142 points to the second end of the light-emitting surface 142, the light-emitting surface 142 extends in the direction close to the central axis of the light guide plate 14.

[0148] It can be understood that the first end of the light-emitting surface 142 refers to the end of the light-emitting surface 142 connected to the second connecting surface 144. The second end of the light-emitting surface 142 refers to the end of the light-emitting surface 142 connected to the first connecting surface 143.

[0149] In some examples, the light-emitting surface 142 can be an inclined arc surface, or the light-emitting surface 142 can also be composed of a plurality of inclined straight surfaces.

[0150] Through the above arrangement, the light-emitting surface 142 is an inclined surface facing away from the head-wearing side B. In this way, when a person other than the wearer of the head-mounted display device 1 looks at the head-mounted display device 1 from the appearance side A, the light-emitting surface can be better seen, and the appearance is more beautiful. In this way, the visual experience can be improved.

[0151] Of course, in other embodiments, the light-emitting surface 142 can also extend along the central axis direction of the light guide plate 14.

[0152] In some embodiments, as shown in FIG. 8, the light-incident surface 141 extends in the direction perpendicular to the cross section of the light guide plate 14, and the light-emitting part 13 is located in the same plane as the light guide plate 14.

[0153] It can be understood that the light emitting piece 13 and the light guide plate 14 are in the same plane, which means that in the direction perpendicular to the axis of the light guide plate 14, the light emitting piece 13 has a projection on the light-incident surface 141.

[0154] In some examples, in the direction perpendicular to the axis of the light guide plate 14, the projection of the light emitting piece 13 falls completely on the light-incident surface 141, which can further improve the utilization of light.

[0155] In this way, the light emitted by the light emitting piece 13 can be irradiated to the light-incident surface 141 to a greater extent. Since the light-incident surface 141 extends in the direction perpendicular to the cross section of the light guide plate 14, when the light is reflected on the light-reflecting surface 142, the reflected light has a greater probability of entering the light guide plate 14 from the light-incident surface 141 on the other side. Therefore, the utilization of light can be further improved, the uniformity of light emission of the light guide plate 14 can be improved, and the visual experience can be improved.

[0156] Of course, in another embodiment, as shown in FIG. 9, in the arrangement direction of the head side B and the appearance side A, the first end of the light-incident surface 141 and the second end of the light-incident surface 141 are arranged in sequence, and in the direction in which the first end of the light-incident surface 141 points to the second end of the light-incident surface 141, the light-incident surface 141 extends towards the axis of the light guide plate 14. That is, the light-incident surface 141 is an inclined surface.

[0157] In some embodiments, as shown in FIGS. 10 and 11, a plurality of optical dot structures 15 are arranged on the light-incident surface 141, and the optical dot structures 15 are used to refract the light emitted by the light emitting piece 13 to enter the light guide plate 14.

[0158] It can be understood that in the case where a plurality of optical dot structures 15 are arranged on the light-incident surface 141, in the process of light passing through the optical dot structure 15, entering the light guide plate 14, and then being emitted, the light can be emitted in various forms, as shown in FIGS. 12, 13, and 14, which are described below.

[0159] Firstly, as shown in FIG. 12, the light is refracted on the surface of the optical dot structure 15, then enters the inside of the optical dot structure 15, and further enters the light guide plate 14, and then is refracted on the light-reflecting surface 142 and finally emitted.

[0160] Secondly, as shown in FIG. 13, the light is refracted on the surface of the optical dot structure 15, then enters the light guide plate 14, and then is reflected on the light-reflecting surface 142. The reflected light enters the optical dot structure 15 again, is emitted from the surface of the optical dot structure 15, and then is emitted to the optical dot structure on the other side of the light-incident surface 141, and then is emitted through the light guide plate 14. In this way, not only the loss of light can be reduced, but also the light emission can be more uniform.

[0161] Thirdly, as shown in FIG. 14, the light is refracted on the surface of the optical dot structure 15, then enters the light guide plate 14, and then is reflected at the light exit surface 142. The reflected light enters the optical dot structure 15 again, is reflected on the surface of the optical dot structure 15, then enters the light guide plate 14 again, and then exits from the light exit surface 142.

[0162] Of course, there are many ways for the light to exit. The above is only an example.

[0163] In some examples, the optical dot structure 15 can cover the light entrance surface 141, so that a more uniform light effect can be achieved.

[0164] In other examples, the optical dot structure 15 can also cover part of the light entrance surface 141.

[0165] In some examples, the optical dot structure 15 and the light guide plate 14 are integrally formed.

[0166] In other examples, the optical dot structure 15 and the light guide plate 14 can be separate structures. The optical dot structure 15 and the light guide plate 14 are processed separately, and then the optical dot structure 15 is connected to the light entrance surface 141.

[0167] In some examples, the material of the optical dot structure 15 is consistent with that of the light guide plate 14.

[0168] In some examples, the optical dot structure 15 can be a protruding part or a recessed part.

[0169] In some examples, the sizes of the plurality of optical dot structures 15 can be consistent, or the sizes of the plurality of optical dot structures 15 can be inconsistent. The sizes can be set according to requirements.

[0170] By arranging the optical dot structure 15 on the light entrance surface 141, the light is refracted when passing through the surface of the optical dot structure 15. Since the optical dot structure 15 generally has a protruding part or a recessed part, and the surface of the protruding part or the inner wall surface of the recessed part is generally a curved surface, an inclined surface, or a rugged surface, the light is more easily refracted. Therefore, the light entering the light guide plate 14 is more dispersed and uniform, and a better light emitting effect can be achieved, improving the visual experience.

[0171] The structure of the optical dot structure 15 can be a protruding part, a recessed part, or a combination of a protruding part and a recessed part. The shape of the protruding part can be various, and the shape of the recessed part can also be various. The following is an example.

[0172] On this basis, in some embodiments, as shown in FIG. 11, the optical dot structure 15 includes a protruding part, and the cross section of the protruding part gradually decreases in the direction away from the light-incident surface 141.

[0173] The protruding part can be in a conical or frustoconical shape, etc.

[0174] In addition, the surface of the protruding part can be arc-shaped, or the surface of the protruding part can include multiple flat surfaces, or the surface of the protruding part can be rugged.

[0175] By setting the optical dot structure 15 as a protruding part structure, when light rays irradiate the surface of the protruding part, the light rays will be refracted and enter the interior of the protruding part, and then enter the interior of the light guide plate 14. In the interior of the light guide plate 14, part of the light rays will be directly emitted through the light-incident surface 142, and the other part of the light rays will be reflected at the light-incident surface 142, be emitted toward the light-incident surface 141, and be reflected again at the light-incident surface 141, and then be emitted to the outside of the light guide plate 14.

[0176] In the direction away from the light-incident surface 141, since the cross section of the protruding part gradually decreases, the surface of the protruding part close to the light-emitting element 13 has a smaller area, and even zero (when the protruding part is in a conical structure). Therefore, more light rays can enter the interior of the protruding part through the side surface of the protruding part. Since the side surface of the protruding part is inclined, the probability of refraction of the light rays can be increased, the refraction angle of the light rays is more diverse, the reflection angle of the light rays reflected at the light-incident surface 142 and the light-incident surface 141 is more diverse, and the distribution of the light rays in the interior of the light guide plate 14 is more uniform. Therefore, the emitted light rays are more uniform, the light uniformity can be improved, and the visual experience can be enhanced.

[0177] Of course, in other embodiments, the optical dot structure 15 can also include a recessed part formed on the light-incident surface 141, and the cross section of the recessed part gradually decreases in the direction away from the light-emitting element 13.

[0178] The recessed part can be in an inverted conical or frustoconical structure, etc.

[0179] In addition, the inner surface of the recessed part can be arc-shaped, or the inner surface of the recessed part can include multiple flat surfaces, or the inner surface of the recessed part can be rugged.

[0180] By setting the optical dot structure 15 as a recess structure, when light rays irradiate to the inner surface of the recess, the light rays will be refracted and enter the inside of the light guide plate 14. In the inside of the light guide plate 14, part of the light rays will directly exit through the light exit surface 142, and the other part of the light rays will be reflected at the light exit surface 142, be directed to the light entrance surface 141, and be reflected again at the light entrance surface 141, and then exit to the outside of the light guide plate 14.

[0181] In the direction away from the light emitting element 13, as the cross section of the recess gradually decreases, the opening b of the recess is larger, so more light rays can enter the inside of the recess through the opening of the recess, and then be refracted at the inner surface of the recess. Thus, the probability of light refraction can be increased, and the refraction angle of the light rays can be more diverse. In addition, as the inner circumferential wall surface of the recess is inclined, the probability of light refraction can also be increased when the light rays contact the inner circumferential wall surface of the recess, and the reflection angle of the light rays reflected at the light exit surface 142 and the light entrance surface 141 can also be more diverse. Thus, the light rays can be more uniformly distributed in the inside of the light guide plate 14, and the exiting light rays can also be more uniform, which can improve the light uniformity and enhance the visual experience.

[0182] The setting mode of the optical dot structure 15 on the light entrance surface 141 can be various, for example, it can be irregular or regular.

[0183] In some embodiments, as shown in FIG. 11, a plurality of optical dot structures 15 are sequentially arranged around the light emitting element 13.

[0184] In some examples, as shown in FIG. 11, a plurality of optical dot structures 15 are sequentially arranged in close proximity along the circumference of the light guide plate 14. Thus, the probability of the light rays contacting the optical dot structure 15 can be increased in the circumference of the light guide plate 14, thereby increasing the probability of light refraction and the diversity of the reflection angle of the light rays reflected at the light exit surface 142 and the light entrance surface 141. Thus, the light rays entering the inside of the light guide plate 14 can be more uniform, which can achieve better light exiting effect and provide better visual experience.

[0185] In other examples, a plurality of optical dot structures 15 can also be arranged at intervals along the circumference of the light guide plate 14.

[0186] For example, the distance between two adjacent optical dot structures 15 can be equal, or the distance between two adjacent optical dot structures 15 can also be unequal.

[0187] Through the above arrangement, in the circumferential direction of the light guide plate 14, the light emitted by the light emitting piece 13 has a higher probability of contacting the optical dot structure 15, thereby increasing the probability of light refraction, increasing the diversity of light refraction angles, and further increasing the diversity of reflection angles of the light reflected at the light exit surface 142 and the light entrance surface 141, so that the light entering the inside of the light guide plate 14 is more uniform, thus achieving a better light emitting effect and providing a better visual experience.

[0188] In some embodiments, as shown in FIG. 15, the optical dot structure 15 extends in the direction in which the first end of the light entrance surface 141 points to the second end of the light entrance surface 141.

[0189] It can be understood that the first end of the light entrance surface 141 refers to the end where the light entrance surface 141 is connected to the second connecting surface 144. The second end of the light entrance surface 141 refers to the end where the light entrance surface 141 is connected to the first connecting surface 143.

[0190] In some examples, the direction in which the first end of the light entrance surface 141 points to the second end of the light entrance surface 141 can be parallel to the central axis of the light guide plate 14.

[0191] Alternatively, the direction in which the first end of the light entrance surface 141 points to the second end of the light entrance surface 141 can also be an acute angle with the central axis of the light guide plate 14.

[0192] In addition, it needs to be explained that the difference in the shape of the optical dot structure 15 itself, for example, the optical dot structure 15 is a wavy line type, will not affect the extension of the optical dot structure 15 in the direction in which the first end of the light entrance surface 141 points to the second end of the light entrance surface 141, and is still within the protection scope of the present application, as long as the overall trend of the optical dot structure 15 is to extend in the direction in which the first end of the light entrance surface 141 points to the second end of the light entrance surface 141.

[0193] In some examples, the optical dot structure 15 can extend from the first end of the light entrance surface 141 to the second end of the light entrance surface 141. In this way, in the direction in which the first end of the light entrance surface 141 points to the second end of the light entrance surface 141, the light emitted by the light emitting piece 13 has a higher probability of contacting the optical dot structure 15, which can increase the probability of light refraction, increase the diversity of light refraction angles, and further increase the diversity of reflection angles of the light reflected at the light exit surface 142 and the light entrance surface 141, so that the light entering the inside of the light guide plate 14 is more uniform, thus achieving a better light emitting effect and providing a better visual experience.

[0194] In some examples, the optical dot structure 15 extends from the first end of the light-incident surface 141 to the second end of the light-incident surface 141.

[0195] Through the above arrangement, in the direction in which the first end of the light-incident surface 141 points to the second end of the light-incident surface 141, the light emitted by the light-emitting piece 13 has a higher probability of contacting the optical dot structure 15, which can increase the probability of light refraction, increase the diversity of light refraction angles, and further increase the diversity of reflection angles of light reflected at the light-incident surface 141 and the light-emitting surface 142, so that the light entering the light guide plate 14 is more uniform, which can achieve a better light-emitting effect and provide a better visual experience.

[0196] In some examples, the optical dot structure 15 extends from the first end of the light-incident surface 141 to the second end of the light-incident surface 141.

[0197] In some examples, the optical dot structure 15 extends from the first end of the light-incident surface 141 to the second end of the light-incident surface 141.

[0198] In some examples, the optical dot structure 15 extends from the first end of the light-incident surface 141 to the second end of the light-incident surface 141.

[0199] In some examples, the optical dot structure 15 extends from the first end of the light-incident surface 141 to the second end of the light-incident surface 141.

[0200] Of course, in other embodiments, the optical dot structures 15 can also be randomly and irregularly distributed on the light-in surface 141.

[0201] In some embodiments, as shown in FIG. 2, the head-mounted display device 1 further comprises a light-reflecting film 16, which is arranged in the cavity a, and both sides of the light-emitting piece 13 have the light-reflecting film 16 in the direction perpendicular to the cross section of the light guide plate 14 (the vertical direction in FIG. 2), and the outer contours of the light-reflecting films 16 on both sides of the light-emitting piece 13 constitute the light-out port, and the light-in surface 141 is arranged at the light-out port.

[0202] It can be understood that the direction perpendicular to the cross section of the light guide plate 14 is the direction of the central axis of the light guide plate 14.

[0203] For ease of description, as shown in FIG. 2 and FIG. 16, it is now defined that, in the direction perpendicular to the cross section of the light guide plate 14, the light-reflecting film 16 on one side of the light-emitting piece 13 is a first light-reflecting film 161, the light-reflecting film 16 on the other side of the light-emitting piece 13 is a second light-reflecting film 162, and the arrangement direction of the first light-reflecting film 161 and the second light-reflecting film 162 is consistent with the arrangement direction of the first connecting surface 143 and the second connecting surface 144.

[0204] In some examples, the first light-reflecting film 161 and the second light-reflecting film 162 are parallel to each other, so that the reflection angles of the light rays irradiated onto the first light-reflecting film 161 and the second light-reflecting film 162 are consistent, which can facilitate the optical design of the light guide plate 14.

[0205] Of course, the two light-reflecting films 16 can also be arranged at an acute angle.

[0206] It can be understood that the specific position of the light-in surface 141 arranged at the light-out port is mainly related to the positions of the first light-reflecting film 161 and the second light-reflecting film 162 relative to the first connecting surface 143 and the second connecting surface 144.

[0207] In some examples, as shown in FIG. 16, the first light-reflecting film 161 and the first connecting surface 143 are located in the same plane, and the second light-reflecting film 162 and the second connecting surface 144 are located in the same plane. In this way, the light-out port matches the light-in surface 141, and the light rays reflected by the first light-reflecting film 161 and the second light-reflecting film 162 must be shot to the light-in surface 141, so that the utilization rate of the light rays can be improved.

[0208] In other examples, the first light-reflecting film 161 and the first connecting surface 143 are located in different planes, and the second light-reflecting film 162 and the second connecting surface 144 are located in different planes,

[0209] Exemplarily, the first light-reflecting film 161 is located between the first connecting surface 143 and the second connecting surface 144, and the second light-reflecting film 162 is located between the first connecting surface 143 and the second connecting surface 144. In this way, the light entrance surface 141 can cover the light exit opening, and the light reflected by the first light-reflecting film 161 and the second light-reflecting film 162 must be directed to the light entrance surface 141, so as to improve the utilization rate of light.

[0210] Exemplarily, as shown in FIG. 17, the first light-reflecting film 161 is located on the side of the first connecting surface 143 away from the second connecting surface 144, and the second light-reflecting film 162 is located on the side of the second connecting surface 144 away from the first connecting surface 143. In this way, in the direction perpendicular to the cross section of the light guide plate 14, the size of the light exit opening is greater than the distance between the first connecting surface 143 and the second connecting surface 144.

[0211] In some examples, the outer contour of the first light-reflecting film 161 is matched with the inner contour of the first connecting surface 143. For example, the inner contour of the first connecting surface 143 is circular, and the outer contour of the first light-reflecting film 161 is circular, and the outer contour of the second light-reflecting film 162 is circular. Alternatively, the inner contour of the first connecting surface 143 is square, and the outer contour of the first light-reflecting film 161 is square, and the outer contour of the second light-reflecting film 162 is square. In this way, the light leakage can be avoided and the utilization rate of light can be ensured with the least use of materials.

[0212] By arranging the light-reflecting film 16, the light emitted by the light emitting member 13 can be reflected by the light-reflecting film 16 during the dispersion process. The light reflected for multiple times can be directed to the light exit opening, and then emitted from the light exit opening to the light entrance surface 141, and then enter the light guide plate 14 and finally exit. Due to the arrangement of the light-reflecting film 16, the loss of light during the dispersion process can be avoided, the utilization rate of light can be improved, and the luminous brightness can be ensured.

[0213] In some embodiments, as shown in FIG. 1 and FIG. 3, the light emitting member 13 includes a plurality of lamp beads 131, and the plurality of lamp beads 131 are arranged along the circumference of the light guide plate 14.

[0214] It can be understood that the plurality of lamp beads 131 also form a surrounding structure consistent with the light guide plate 14. The shape of the surrounding structure formed by the plurality of lamp beads 131 can be circular, semicircular, square, or the like.

[0215] In some examples, the number of lamp beads 131 can be two, three, four, five, six, eight, ten, or the like. The number of lamp beads 131 is eight in the drawings.

[0216] In some examples, the plurality of lamp beads 131 are arranged at intervals along the circumference of the light guide plate 14.

[0217] Exemplarily, the plurality of lamp beads 131 are arranged uniformly along the circumference of the light guide plate 14. In this way, the light entering the light-incident surface 141 can be more uniform along the circumference of the light guide plate 14, so as to ensure the uniformity of the overall light emission of the light guide plate 14.

[0218] Alternatively, the plurality of lamp beads 131 are arranged non-uniformly along the circumference of the light guide plate 14.

[0219] In some other examples, the plurality of lamp beads 131 are arranged sequentially and closely along the circumference of the light guide plate 14.

[0220] By setting the light-emitting member 13 in the form of the plurality of lamp beads 131, light emission is achieved. Since the plurality of lamp beads 131 are arranged along the circumference of the light guide plate 14, the plurality of lamp beads 131 also have a surrounding structure, and the surrounding direction of the plurality of lamp beads 131 is consistent with the circumference of the light guide plate 14. Therefore, along the circumference of the light guide plate 14, the light can be more uniformly emitted to the light-incident surface 141, so as to ensure the uniformity of the overall light emission of the light guide plate 14 and improve the visual experience.

[0221] On this basis, in some embodiments, as shown in FIG. 1 and FIG. 2, the head-mounted display device 1 further comprises an adapter plate 17, which is arranged in the cavity a and is used to be electrically connected with the controller 19 of the head-mounted display device 1. The adapter plate 17 is located between the light-reflecting film 16 and the wall surface of the cavity a. The lamp beads 131 are arranged on the side of the adapter plate 17 close to the light-reflecting film 16 and are electrically connected with the adapter plate 17. The lamp beads 131 pass through the light-reflecting film 16 on the side where the adapter plate 17 is located, so as to extend into the light-reflecting film 16 located on both sides of the lamp beads 131.

[0222] In some examples, the adapter plate 17 can be a flexible printed circuit (FPC). The flexible printed circuit has the characteristics of light weight, thin thickness and bendability, and thus can be applied in the narrow space of the cavity a.

[0223] Of course, the adapter plate 17 can also be a hard circuit board.

[0224] In some examples, the adapter plate 17 can be located between the first light-reflecting film 161 and the wall surface of the cavity a, or the adapter plate 17 can also be located between the second light-reflecting film 162 and the wall surface of the cavity a. The specific arrangement can be set according to the space layout. In this application, the adapter plate 17 is arranged between the second light-reflecting film 162 and the wall surface of the cavity a.

[0225] In some examples, the controller 19 can be connected to the shell 11.

[0226] By setting the adapter plate 17, the plurality of lamp beads 131 are set on the adapter plate 17, and the adapter plate 17 can provide certain support for the plurality of lamp beads 131, so as to stably set the lamp beads 131 in the cavity a. In addition, since the adapter plate 17 is electrically connected with the plurality of lamp beads 131 at the same time, and the adapter plate 17 is electrically connected with the controller 19, the electrical connection between the plurality of lamp beads 131 and the controller 19 can be realized at one time, which is convenient for control. At the same time, the line connection between the lamp beads 131 and the controller 19 can be simplified, which is convenient for installation and later maintenance.

[0227] Of course, in other embodiments, the plurality of lamp beads 131 can also be directly electrically connected with the controller 19 by using wires.

[0228] On this basis, in some embodiments, as shown in FIG. 2, the head-mounted display device 1 further comprises a reinforcing piece 18, which is arranged in the cavity a, and the adapter plate 17 is abutted between the light-reflecting film 16 and the reinforcing piece 18.

[0229] It can be understood that, in the case that the adapter plate 17 is located between the first light-reflecting film 161 and the wall surface of the cavity a, the reinforcing piece 18 is located on the side of the adapter plate 17 away from the first light-reflecting film 161. In the case that the adapter plate 17 is located between the second light-reflecting film 162 and the wall surface of the cavity a, the reinforcing piece 18 is located on the side of the adapter plate 17 away from the second light-reflecting film 162.

[0230] The reinforcing piece 18 can be a plate structure or an irregular structure, etc.

[0231] In some examples, in the direction perpendicular to the cross section of the light guide plate 14, the projection of the adapter plate 17 is located within the range of the reinforcing piece 18, so that the reinforcing piece 18 can provide sufficient support for the adapter plate 17.

[0232] For example, in the direction perpendicular to the cross section of the light guide plate 14, the projection of the adapter plate 17 coincides with the reinforcing piece 18. In this way, the reinforcing piece 18 can not only provide sufficient support for the adapter plate 17, but also can save the material of the reinforcing piece 18 to the greatest extent.

[0233] In other examples, in the direction perpendicular to the cross section of the light guide plate 14, the projection of the reinforcing piece 18 can also be located within the range of the adapter plate 17.

[0234] In some examples, the reinforcing piece 18 can be directly fixed with the wall surface of the cavity a, so that the reinforcing piece 18 can be stably arranged in the cavity a, thereby providing support for the adapter plate 17.

[0235] By setting the reinforcing member 18, the reinforcing member 18 can provide support for the adapter plate 17, and deformation of the adapter plate 17 can be avoided, thereby ensuring the stability of the lamp beads 131 arranged on the adapter plate 17, and further ensuring the stability of light emission, and improving the visual experience.

[0236] The shell 11 has an opening b in a surrounding structure. In order to form the opening b, the opening b can be directly formed on the shell 11, or the shell 11 can be provided as two parts of a body 111 and a light shielding cover plate 112, and the opening b is formed by the body 111 and the light shielding cover plate 112. The specific description is as follows.

[0237] In some embodiments, as shown in FIG. 1 and FIG. 2, the shell 11 includes the body 111 and the light shielding cover plate 112. The body 111 has an appearance side A. The light shielding cover plate 112 is located on the appearance side A of the body 111 and connected with the body 111. In the direction perpendicular to the cross section of the light guide plate 14, the light shielding cover plate 112 is spaced apart from the body 111 to form the opening b. The gap between the body 111 and the light shielding cover plate 112 forms the cavity a.

[0238] It can be understood that the display lens 12 is arranged on the body 111.

[0239] The light shielding cover plate 112 can be directly connected with the body 111. Alternatively, the light shielding cover plate 112 can be connected with the light guide plate 14, and then the light guide plate 14 is connected with the body 111 to realize the connection between the light shielding cover plate 112 and the body 111.

[0240] In addition, the inner surface and / or the outer surface of the light shielding cover plate 112 can be coated with a light shielding material, so that the light shielding cover plate 112 has a light shielding function. Alternatively, the light shielding cover plate 112 can be made of a light shielding material as a whole, so that the light shielding cover plate 112 has a light shielding function.

[0241] In some examples, the light shielding cover plate 112 is detachably connected with the body 111, so that the installation, maintenance or replacement of the light emitting element 13, the reflective film 16 and other structures inside the cavity a can be facilitated.

[0242] By setting the shell 11 as two parts of the body 111 and the light shielding cover plate 112, light cannot pass through the body 111 and the light shielding cover plate 112 to exit, but can only pass through the opening b to exit. Since the light guide plate 14 is arranged at the opening b, the light needs to pass through the light guide plate 14 to exit outside the cavity a. Since the shell 11 includes the body 111 and the light shielding cover plate 112, the installation of the light emitting element 13, the reflective film 16 and other structures inside the cavity a can be facilitated.

[0243] In some embodiments, as shown in FIG. 2, the light guide plate 14 further comprises a first connecting surface 143 and a second connecting surface 144 oppositely arranged in a direction perpendicular to the cross section of the light guide plate 14, and the first connecting surface 143 faces away from the body 111 and is covered by the light shielding cover plate 112.

[0244] It can be understood that in this case, the light guide plate 14 should be arranged inside the opening b.

[0245] In this way, light entering the inside of the light guide plate 14 can be prevented from being emitted from the first connecting surface 143, and light leakage can be avoided to improve the visual experience. In addition, light emitted from the first connecting surface 143 to the light shielding cover plate 112 can be reflected on the surface of the light shielding cover plate 112 and re-enter the inside of the light guide plate 14, so that the utilization rate of light can be improved and the brightness can be improved.

[0246] In some embodiments, as shown in FIG. 2, the light guide plate 14 is provided with a first limiting piece 21 arranged along the circumference thereof. The light shielding cover plate 112 is provided with a second limiting piece 22, and the first limiting piece 21 and the second limiting piece 22 are connected in cooperation to limit the movement of the light shielding cover plate 112 relative to the light guide plate 14.

[0247] In some examples, one of the first limiting piece 21 and the second limiting piece 22 comprises a first recess, and the other comprises a first protrusion, and the first protrusion extends into the first recess and is matched with the first recess. The movement of the light shielding cover plate 112 relative to the light guide plate 14 is limited by the cooperation of the first recess and the first protrusion.

[0248] For example, the first limiting piece 21 comprises a first protrusion. Since the first protrusion protrudes from the light guide plate 14, it will not affect the original structure of the light guide plate 14, and can ensure the stability of the light guide performance of the light guide plate 14 and facilitate the optical design of the light guide plate 14.

[0249] The first protrusion can be an integral structure with the light guide plate 14. In this way, the structural strength of the two can be increased, and secondary assembly is not required.

[0250] Of course, the first protrusion can also be a separate structure from the light guide plate 14, and the first protrusion and the light guide plate 14 are respectively machined, and then fixed together by a suitable fixing method such as bonding.

[0251] For example, the material of the first protrusion is consistent with the material of the light guide plate 14, so that the machining is more convenient.

[0252] Exemplarily, the first recesses are multiple in number, and the multiple first recesses are arranged at intervals along the circumference of the light guide plate 14. Correspondingly, the first protrusions are multiple in number, and the multiple first protrusions are arranged at intervals along the circumference of the light guide plate 14, the multiple first recesses correspond to the multiple first protrusions one by one, and the first protrusions extend into the corresponding first recesses.

[0253] Exemplarily, the number of the first recesses can be two, three, four, five, seven or eight, etc.

[0254] Exemplarily, the number of the first protrusions can be two, three, four, five, seven or eight, etc.

[0255] Exemplarily, the multiple first recesses are arranged at uniform intervals along the circumference of the light guide plate 14, and correspondingly, the multiple first protrusions are arranged at uniform intervals along the circumference of the light guide plate 14.

[0256] Exemplarily, the multiple first recesses are arranged at random intervals along the circumference of the light guide plate 14, and correspondingly, the multiple first protrusions are arranged at random intervals along the circumference of the light guide plate 14.

[0257] In other examples, the light guide plate 14 extends around the light emitting member 13, and the first recess and the first protrusion are each one, the first recess extends along the circumference of the light guide plate 14, and correspondingly, the first protrusion is arranged along the circumference of the light guide plate 14, and the first protrusion extends into the first recess.

[0258] Exemplarily, in the case where the light guide plate 14 extends around the light emitting member 13 for one turn, the first recess extends along the circumference of the light guide plate 14 for one turn or part, and correspondingly, the first protrusion extends along the circumference of the light guide plate 14 for one turn or part.

[0259] On this basis, in the case where the first recess extends along the circumference of the light guide plate 14 for one turn and the first protrusion extends along the circumference of the light guide plate 14 for one turn, the first protrusion and the first recess are in interference fit to ensure the clamping of the first protrusion and the first recess.

[0260] In some examples, the first limiting member 21 is arranged on the first connecting surface 143, so that the first limiting member 21 can avoid affecting the light-in surface 141 and the light-out surface 142.

[0261] In some examples, the second limiting member 22 is arranged on the surface of the light-shielding cover plate 112 covering the first connecting surface 143.

[0262] By arranging the first limiting member 21 and the second limiting member 22, the first limiting member 21 and the second limiting member 22 are used to limit the movement of the light-shielding cover plate 112 relative to the light guide plate 14, so as to realize the fixation between the light-shielding cover plate 112 and the light guide plate 14.

[0263] In other embodiments, the light guide plate 140 and the light shielding cover plate 112 are integrally formed.

[0264] In some examples, the light guide plate 140 and the light shielding cover plate 112 are integrally injection molded.

[0265] By processing the light guide plate 140 and the light shielding cover plate 112 into an integral structure, not only can the overall structural strength of the light guide plate 140 and the light shielding cover plate 112 be improved, but also the light guide plate 140 and the light shielding cover plate 112 can be processed at one time, without the need for secondary processing, thereby reducing the processing procedures.

[0266] In some embodiments, as shown in FIG. 1 and FIG. 2, the head-mounted display device 01 further includes a touch unit 25, which is arranged on the shell 11 and located on the appearance side A. The touch unit 25 is used to be electrically connected with the controller of the head-mounted display device 1.

[0267] In some examples, the touch unit 25 can include a touch panel.

[0268] In some examples, the touch unit 25 can be electrically connected with the controller 19 through an adapter flexible circuit board 20. The adapter flexible circuit board 20 can be bent and deformed, so it can be applied to the narrow space inside the cavity a.

[0269] By arranging the touch unit 25, the user can trigger the touch unit 25 to send instructions to the touch unit 25, thereby controlling the head-mounted display device 1. Due to the arrangement of the touch unit 25, the user can conveniently control the head-mounted display device 1.

[0270] In some embodiments of the present application, as shown in FIG. 2, the touch unit 25 is located between the light shielding cover plate 112 and the body 111.

[0271] In some examples, through holes are formed on the first light reflecting film 161, the second light reflecting film 162, the adapter plate 17, and the reinforcing member 18. The through holes are used to avoid the adapter flexible circuit board 20 electrically connected with the touch unit 25, so as to facilitate the arrangement of the adapter flexible circuit board 20.

[0272] It can be understood that when the head-mounted display device 1 includes the light reflecting film 16, the touch unit 25 should be arranged between the light reflecting film 16 and the light shielding cover plate 112, so that the touch unit 25 can be protected by the light shielding cover plate 112 on the basis of ensuring that the touch unit 25 can be normally triggered by the user.

[0273] In some examples, glue can be arranged between the light shielding cover plate 112 and the touch unit 25, so as to adhere and fix the touch unit 25 on the light shielding cover plate 112.

[0274] Through the above arrangement, the user can trigger the touch unit 25 by touching the light shielding cover plate 112 to send an instruction to the touch unit 25 to control the head-mounted video device 1. In addition, since the touch unit 25 is arranged between the light shielding cover plate 112 and the body 111, the light shielding cover plate 112 can protect the touch unit 25 from being damaged.

[0275] Of course, in other embodiments of the present application, the touch unit 25 can also be arranged on the outer surface of the shell 11.

[0276] Based on the arrangement of the touch unit 25, as shown in FIG. 18, the present application provides a control method of the head-mounted display device 1, specifically comprising S101-S102:

[0277] S101: The touch unit 25 is configured to receive an operation instruction;

[0278] S102: In response to the operation instruction, the light emitting member 13 switches to a corresponding light emitting state.

[0279] In some examples, there are a plurality of different icons on the touch unit 25, and the user can trigger the different icons on the touch unit 25 to make the touch unit 25 respond to the operation instruction corresponding to the icon, so that the light emitting member 13 switches to the corresponding light emitting state.

[0280] Exemplarily, the plurality of different icons include a 2D video icon, a 3D video icon, and a panoramic 360° video icon. The plurality of light emitting states include a marquee light emitting state, a single-color light constant light emitting state, and a multi-color light constant light emitting state.

[0281] The 2D video icon corresponds to a 2D video operation instruction, and the 2D video operation instruction can correspond to the marquee light emitting state.

[0282] The 3D video icon corresponds to a 3D video operation instruction, and the 3D video operation instruction can correspond to the single-color light constant light emitting mode.

[0283] The panoramic 360° video icon corresponds to a panoramic 360° video operation instruction, and the panoramic 360° video operation instruction can correspond to the multi-color light constant light emitting state.

[0284] In the marquee light emitting state and the multi-color light constant light emitting state, the light emitted by the light emitting member 13 can be any combination of different colors. For example, the light emitting member 13 includes a plurality of lamp beads 131, and the light emitted by the light emitting member 13 can be any combination of two or more of white, red, blue, yellow, or purple.

[0285] For the single-color constant light emitting state, the light emitted by the light emitting member 13 can be of any color, for example, the light emitted by the light emitting member 13 can be of any one of white, red, blue, yellow or purple.

[0286] In this way, when the user triggers different icons, the video conference device 1 performs different control, so as to switch the light emitting member 13 to different light emitting states.

[0287] Through the above setting, the user can issue different operation instructions to the touch unit 25, and the light emitting member 13 can be switched to the corresponding light emitting state by responding to different operation instructions. Such a setting can facilitate prompting the user by using different light emitting states of the light emitting member 13, and improve the intelligent degree.

[0288] In some embodiments, as shown in FIG. 19, the present application also provides another control method of the head-mounted display device 1, specifically comprising S101 and S103:

[0289] S101: The touch unit 25 is configured to receive an operation instruction;

[0290] S103: In response to the operation instruction, the controller is configured to control the head-mounted display device 1 to switch the working state.

[0291] In some examples, the working state can include a 2D video working state, a 3D video working state and a panoramic 360° video working state, different working states correspond to different operation instructions, and the head-mounted display device 1 is switched to different working states by receiving different operation instructions.

[0292] Through the above setting, the user can issue operation instructions to the touch unit 25, and the controller can control the head-mounted display device 1 to switch the working state after responding to the operation instruction. In this way, the user can be facilitated to operate.

[0293] In some embodiments, as shown in FIG. 20, the present application provides still another control method of the head-mounted display device 1, specifically comprising S101, S1021 and S1022:

[0294] S101: The touch unit 25 is configured to receive an operation instruction;

[0295] S1021: The controller is configured to respond to the operation instruction to retrieve a first state instruction, and based on the first state instruction, the controller controls the head-mounted display device 1 to switch the working state;

[0296] S1022: Based on the working state of the head-mounted display device 1 switched, the controller controls the light emitting member 13 to switch to the light emitting state corresponding to the working state.

[0297] In some examples, based on the working state of the head-mounted display device 1 switching, the controller controls the light emitting piece 13 to switch to the light emitting state corresponding to the working state, including: the controller further calls the second state instruction corresponding to the first state instruction, and based on the second state instruction, the controller controls the light emitting piece 13 to switch to the light emitting state corresponding to the working state.

[0298] Exemplarily, the corresponding relationship between the first state instruction and the second state instruction can be stored in the memory of the head-mounted display device 1, the memory is electrically connected with the controller, and the controller can call the corresponding table in which the corresponding relationship between the first state instruction and the second state instruction is stored, so as to realize the corresponding switching of the working state and the light emitting state.

[0299] Exemplarily, the plurality of first state instructions include a 2D video mode, a 3D video mode and a panoramic 360° video mode. The plurality of second state instructions include a marquee mode, a single-color light constant mode and a multi-color light constant mode. The 2D video mode corresponds to the marquee mode, the 3D video mode corresponds to the single-color light constant mode, and the panoramic 360° video mode corresponds to the multi-color light constant mode. In this way, when the user triggers the first state instruction by touching the unit 25, the controller 19 controls the light emitting piece 13 to switch to the corresponding light emitting mode when the head-mounted display device 1 switches to the corresponding mode, so as to prompt the user that the head-mounted display device 1 is in which working state.

[0300] Through the above setting, the user can issue an operation instruction to the triggering unit 25, and the controller will call the first state instruction and control the head-mounted display device 1 to switch the working state based on the first state instruction, and the controller can control the light emitting piece 13 to switch to the light emitting state corresponding to the working state based on the working state, so as to realize the correspondence between the light emitting state and the working state and prompt the user.

[0301] In some embodiments, as shown in FIG. 1 and FIG. 2, the body 111 includes a base body 1111 and a decorative plate 1112, the base body 1111 has an appearance side A, and the gap between the light shielding cover plate 112 and the base body 1111 forms a cavity a. The decorative plate 1112 is located on the appearance side A of the base body 1111 and is arranged around the light emitting piece 13, the decorative plate 1112 is located on the side of the light guide plate 14 away from the light emitting piece 13, and the decorative plate 1112 forms an opening b with the light shielding cover plate 112.

[0302] It can be understood that the display lens 12 is arranged on the base body 1111.

[0303] The base body 1111 and the decorative plate 1112 can be detachably connected or fixedly connected.

[0304] By setting the body 111 as two parts of the base body 1111 and the decorative plate 1112, the base body 1111 can be used to carry the light emitting piece 13, the light guide plate 14 and other components, and the decorative plate 1112 can decorate the base body 1111, thereby ensuring the overall aesthetics of the head-mounted display device 1.

[0305] In some embodiments, as shown in FIG. 2, the light guide plate 14 is provided with a third limiting piece 23 arranged along the circumference thereof. The decorative plate 1112 is formed with a fourth limiting piece 24. The third limiting piece 23 and the fourth limiting piece 24 are connected in cooperation to limit the movement of the light guide plate 14 relative to the decorative plate 1112.

[0306] In some examples, one of the third limiting piece 23 and the fourth limiting piece 24 includes a second groove, and the other includes a second protrusion which extends into the second groove and is adapted to the second groove. By cooperation of the second groove and the second protrusion, the movement of the light guide plate 14 relative to the decorative plate 1112 is limited.

[0307] Illustratively, the third limiting piece 23 includes a second protrusion. Since the second protrusion protrudes from the light guide plate 14, it does not affect the original structure of the light guide plate 14, can ensure the stability of the light guide performance of the light guide plate 14, and is convenient for optical design of the light guide plate 14.

[0308] The second protrusion can be integrally formed with the light guide plate 14. In this way, the structural strength of the two can be increased, and secondary assembly is not required.

[0309] Of course, the second protrusion can also be a separate structure from the light guide plate 14, and the second protrusion and the light guide plate 14 are respectively processed, and then fixed together by a suitable fixing method such as bonding.

[0310] Illustratively, the material of the second protrusion is consistent with the material of the light guide plate 14, which can facilitate processing.

[0311] Illustratively, the number of the second grooves is multiple, and the multiple second grooves are arranged at intervals along the circumference of the light guide plate 14. Correspondingly, the number of the second protrusions is multiple, and the multiple second protrusions are arranged at intervals along the circumference of the light guide plate 14. The multiple second grooves and the multiple second protrusions correspond one-to-one, and the second protrusions extend into the corresponding second grooves.

[0312] Illustratively, the number of the second grooves can be two, three, four, five, seven or eight, etc.

[0313] Illustratively, the number of the second protrusions can be two, three, four, five, seven or eight, etc.

[0314] Exemplarily, the plurality of second grooves are uniformly spaced along the circumference of the light guide plate 14, and correspondingly, the plurality of second protrusions are uniformly spaced along the circumference of the light guide plate 14.

[0315] Exemplarily, the plurality of second grooves are randomly spaced along the circumference of the light guide plate 14, and correspondingly, the plurality of second protrusions are randomly spaced along the circumference of the light guide plate 14.

[0316] Exemplarily, the light guide plate 14 extends around the light emitting member 13, one second groove and one second protrusion are provided, the second groove extends along the circumference of the light guide plate 14, and correspondingly, the second protrusion is arranged along the circumference of the light guide plate 14, the second protrusion extends into the second groove.

[0317] Exemplarily, in the case that the light guide plate 14 extends around the light emitting member 13 for one turn, the second groove extends along the circumference of the light guide plate 14 for one turn or part, and correspondingly, the second protrusion extends along the circumference of the light guide plate 14 for one turn or part.

[0318] On this basis, in the case that the second groove extends along the circumference of the light guide plate 14 for one turn and the second protrusion extends along the circumference of the light guide plate 14 for one turn, the second protrusion is in interference fit with the second groove to ensure the clamping of the second protrusion and the second groove.

[0319] Exemplarily, the third limiting member 23 is arranged on the second connecting surface 144, so as to avoid the third limiting member 23 from affecting the light-in surface 141 and the light-out surface 142.

[0320] Exemplarily, the fourth limiting member 24 is arranged on the surface of the decorative plate 1112 facing the second connecting surface 144.

[0321] In other examples, the light guide plate 14 is a ring structure, the third limiting member 23 includes a second protrusion, the second protrusion is connected to the second connecting surface 144, in the direction perpendicular to the central axis of the light guide plate 14, the second protrusion is located in the middle of the second connecting surface 144, on the side of the second protrusion away from the light emitting member 13, part of the surface of the second connecting surface 144 is a first inclined surface, the first end of the first inclined surface and the second end of the first inclined surface are arranged in turn in the direction from the head-wearing side B to the outward light side A, and in the direction from the first end of the first inclined surface to the second end of the first inclined surface, the first inclined surface extends in the direction away from the central axis of the light guide plate 14.

[0322] The decorative plate 1112 is arranged around the second protrusion for one turn, and the decorative plate 1112 has a second inclined surface abutting against the first inclined surface, the decorative plate 1112 has a first matching surface facing the second protrusion, the side of the second protrusion away from the light emitting member 13 is the second matching surface, the first matching surface and the second matching surface abut against each other, and the first matching surface and the second inclined surface constitute the fourth limiting member 24.

[0323] Through the above setting, when the light guide plate 14 is arranged inside the decorative plate 1112, the first inclined surface and the second inclined surface are in abutment, and the first fitting surface and the second fitting surface are in abutment, so that the decorative plate 1112 can provide a force on the second protrusion on the light guide plate 14 in the direction close to the light emitting element 13, so that the light guide plate 14 can be clamped in the decorative plate 1112. Not only can the relative fixation of the light guide plate 14 and the decorative plate 1112 be achieved, but also the light guide plate 14 and the decorative plate 1112 can be assembled more tightly, thereby improving the overall reliability of the head-mounted display device 1.

[0324] By arranging the third limiting piece 23 and the fourth limiting piece 24, the third limiting piece 23 and the fourth limiting piece 24 are cooperated to limit the movement of the light guide plate 14 relative to the decorative plate 1112, thereby achieving the fixation between the light guide plate 14 and the decorative plate 1112.

[0325] The above is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A head-mounted display device, wherein, The head-mounted display device comprises: a housing having an appearance side, the housing having a cavity and an opening in communication with the cavity, the opening being located on the appearance side; a light-emitting element arranged in the cavity; a light guide plate connected to the opening and matched with the opening, the light guide plate having an incident light surface and an exit light surface, the incident light surface facing the light-emitting element, and light emitted from the exit light surface being capable of being emitted out of the cavity.

2. The head-mounted display device of claim 1, wherein, The head-mounted display device further comprises a touch unit arranged on the housing and located on the appearance side, the touch unit being used for electrical connection with a controller of the head-mounted display device.

3. The head-mounted display device of claim 2, wherein, The opening and the light guide plate are both arranged around the light-emitting element, the incident light surface is located on the inner side of the light guide plate, and the incident light surface and the exit light surface are oppositely arranged.

4. The head-mounted display device of claim 3, wherein, The housing further has a head-mounted side opposite to the appearance side, in a direction pointing from the head-mounted side to the appearance side, a first end of the exit light surface and a second end of the exit light surface are sequentially arranged, and in a direction pointing from the first end of the exit light surface to the second end of the exit light surface, the exit light surface extends towards a direction close to an axis of the light guide plate.

5. The head-mounted display device of claim 3 or 4, wherein, The incident light surface is provided with a plurality of optical dot structures, the optical dot structures being used for refracting light emitted by the light-emitting element to enter the light guide plate.

6. The head-mounted display device of claim 5, wherein, The optical dot structure comprises a protruding portion, and in a direction away from the incident light surface, a cross section of the protruding portion gradually decreases.

7. The head-mounted display device of claim 5 or 6, wherein, The plurality of optical dot structures are sequentially arranged around the light-emitting element, and / or the optical dot structure extends in a direction from the first end of the incident light surface to the second end of the incident light surface.

8. The head-mounted display device of any one of claims 3-7, wherein, The incident light surface extends in a direction perpendicular to a cross section of the light guide plate, and the light-emitting element is located in the same plane as the light guide plate.

9. The head-mounted display device of any one of claims 3-8, wherein, The head-mounted display device further comprises a reflective film arranged in the cavity, in a direction perpendicular to the cross section of the light guide plate, both sides of the light-emitting element are provided with the reflective film, an outer contour of the reflective films located on both sides of the light-emitting element forms a light exit opening, and the incident light surface is arranged at the light exit opening.

10. The head-mounted display device of claim 9, wherein, The light-emitting element comprises a plurality of lamp beads, and the plurality of lamp beads are arranged along a circumferential direction of the light guide plate.

11. The head-mounted display device of claim 10, wherein, The head-mounted display device further comprises: an adapter plate arranged in the cavity and used for electrical connection with the controller of the head-mounted display device, the adapter plate being located between the reflective film and a wall surface of the cavity, lamp beads being arranged on a side of the adapter plate close to the reflective film and being electrically connected with the adapter plate, and the lamp beads penetrating through the reflective film on the side of the adapter plate to extend into the reflective films located on both sides of the lamp beads.

12. The head-mounted display device of claim 11, wherein, The head-mounted display device further comprises a reinforcing element arranged in the cavity, and the adapter plate abuts between the reflective film and the reinforcing element.

13. The head-mounted display device of any of claims 3-12, wherein, The housing comprises: a body having the appearance side; a light-shielding cover plate located on the appearance side of the body and connected with the body, the light-shielding cover plate and the body being spaced apart in a direction perpendicular to the cross section of the light guide plate to form the opening, and a gap between the body and the light-shielding cover plate forming the cavity.

14. The head-mounted display device of claim 13, wherein, The touch unit is located between the light-shielding cover plate and the body.

15. The head-mounted display device of claim 13 or 14, wherein, The light guide plate further comprises oppositely arranged first and second connecting surfaces in a direction perpendicular to a cross section of the light guide plate, the first connecting surface faces away from the body, and the light-shielding cover plate covers the first connecting surface.

16. The head-mounted display device of claim 15, wherein, The light guide plate is provided with first limiting members arranged along a circumferential direction thereof, and the light-shielding cover plate is provided with second limiting members, the first limiting members and the second limiting members are connected in a cooperative manner to limit movement of the light-shielding cover plate relative to the light guide plate.

17. The head-mounted display device of claim 15, wherein, The light guide plate and the light-shielding cover plate are integrally formed.

18. The head-mounted display device of any one of claims 13-17, wherein, The body comprises: a base body having the appearance side, a gap between the base body and the light-shielding cover plate forming the cavity; a decorative plate located on the appearance side of the base body and arranged around the light-emitting member, the decorative plate being located on a side of the light guide plate away from the light-emitting member, and the decorative plate and the light-shielding cover plate forming the opening.

19. The head-mounted display device of any one of claims 3-18, wherein, The opening and the light guide plate both extend around the light-emitting member.

20. The head-mounted display device of any one of claims 2-19, wherein: the touch unit is configured to receive an operation instruction; in response to the operation instruction, the light-emitting member is switched to a corresponding light-emitting state.

21. The head-mounted display device of any one of claims 2-19, wherein: the touch unit is configured to receive an operation instruction; in response to the operation instruction, the controller is configured to control the head-mounted display device to switch a working state.

22. The head-mounted display device of any one of claims 2-19, wherein: the touch unit is configured to receive an operation instruction; the controller is configured to respond to the operation instruction to retrieve a first state instruction, based on the first state instruction, the controller controls the head-mounted display device to switch a working state; based on the working state of the head-mounted display device being switched, the controller controls the light-emitting member to switch to a light-emitting state corresponding to the working state.

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