CN115236854B - AR frame and AR glasses - Google Patents

Abstract

The application discloses an AR frame and AR glasses. The AR mirror holder is through setting up the optical waveguide piece at the last frame of picture frame, avoids the user to receive the interference of optical waveguide piece when observing real scene, makes the user can not produce the influence to daily activity when wearing AR glasses. The AR glasses disclosed by the application are not limited by application scenes, and can be worn for a long time.

Description

AR frame and AR glasses

Technical Field

The application relates to the technical field of wearable equipment, in particular to an AR (augmented reality) mirror frame and AR glasses.

Background

The AR glasses realize the display function through the optical waveguide scheme, but because the grating area of the current optical waveguide not only can shield the real environment, but also can have rainbow lines, the user is prevented from observing the real environment, the daily activities of the user are affected, and the AR glasses are difficult to wear for a long time.

Disclosure of Invention

The application discloses an AR frame and AR glasses. The AR glasses can make the user observe virtual image and reality scene simultaneously, and this application is through setting up the optical waveguide piece at the last frame of picture frame, avoids the optical waveguide piece to cause the interference to reality scene, and when the user wore AR glasses, the AR glasses can not influence daily activity, can wear for a long time.

In a first aspect, the present application provides an AR frame comprising a light emitting assembly for emitting display light; a lens frame having an installation space for installing lenses, the lens frame including an upper frame located above the installation space; and the optical waveguide sheet is fixed on the upper frame and is used for receiving the display light and forming emergent light, the emergent light deflects downwards towards the inner side of the installation space, the view field of a user when observing the real scene is avoided being blocked, the interference of rainbow lines on the real scene is prevented from being caused in the view field, the user cannot influence daily activities when wearing the electronic equipment, and the electronic equipment is beneficial to use in the daily scene.

In one possible implementation manner, the optical waveguide sheet includes a substrate, and a coupling-in grating and a coupling-out grating fixed on the substrate, where the coupling-in grating and the coupling-out grating are respectively located at two ends of the optical waveguide sheet, the coupling-in grating is used for receiving display light, the coupling-out grating is used for emitting outgoing light, the outgoing light forms an included angle with a third direction, and the third direction is a direction perpendicular to the lens.

In this application, the coupling-in grating may be disposed on an inner side surface of the substrate, and the extending direction may be parallel to the second direction, for receiving the display light and changing the propagation direction of the light to form the incident light. The incident angle of the incident light is greater than the total reflection angle of the substrate, so that the incident light can be totally reflected when encountering the surface of the substrate. The coupling-in grating may be a surface relief grating, a holographic volume grating, or the like. In this application, the substrate extends in a first direction, a second direction is perpendicular to the first direction, and a third direction is perpendicular to the direction of the lens, i.e. the third direction is parallel to the direction of the optical axis of the lens.

In the present application, the out-coupling grating and the in-coupling grating may be arranged on the same side of the substrate, i.e. the out-coupling grating may also be arranged on the inner side of the substrate. For example, the outcoupling grating may also employ a surface relief grating, a holographic volume grating, or the like.

In a possible implementation, the outgoing light forms an angle with the third direction of more than 10 °. The angle may be an angle between the exit field of view centerline and the third direction. The included angle may be greater than 10 °, for example, the included angle may be in the range of 20 ° to 40 °. The larger the included angle is, the larger the range of the emergent light view field in the second direction is, and the size of the included angle can be adjusted according to the requirement, which is not limited in the embodiment.

In one possible implementation, the plurality of out-coupling gratings includes a first out-coupling grating and a second out-coupling grating that are stacked, where the second out-coupling grating is located on a side of the first out-coupling grating facing away from the substrate, and an included angle exists between the first out-coupling grating and the second out-coupling grating, and the substrate extends along the first direction.

In the present application, the first coupling-out grating may be disposed on a surface of the substrate, for emitting light, and expanding a range of an outgoing light field in the first direction.

In a possible implementation, a first angle is formed between the first coupling-out grating and a second direction, the first angle being smaller than 45 °, and the second direction being perpendicular to the first direction. Specifically, when the incident light propagating in the substrate encounters the first coupling-out grating on the surface of the substrate each time, part of the light is emitted from the optical waveguide sheet, and the other part of the light is divided into two parts, and the two parts are respectively propagated along the first direction and the second direction in a folded line manner, so that two-dimensional pupil expansion is realized, the field of view of the emergent light is expanded in the first direction and the second direction, and the field of view range of the emergent light is further expanded.

In a possible implementation, a second angle exists between the second out-coupling grating and the first direction, and the second angle is smaller than 20 °. The second coupling-out grating is disposed at a side of the first coupling-out grating facing away from the substrate, and the extending direction may be parallel to the first direction, so as to deflect the light downward, so as to expand the range of the emergent light field in the second direction.

In this application, the second coupling-out grating can change the propagation direction of light through diffraction effect, makes emergent light deflect downwards to realize the expansion of emergent light visual field in the second direction, make the light that the human eye can observe the light that jets out from the optical waveguide piece that is located the frame, thereby realize neither shelter from the visual field that the user observed real scene, can see virtual image's technological effect again, avoid producing the influence to user's daily activity, be favorable to the long-term wearing of user.

In one possible implementation, the optical waveguide sheet includes a relay grating, the coupling-out grating is disposed on an inner side surface of the substrate, the relay grating is disposed on an outer side surface of the substrate and opposite to the coupling-out grating, and the coupling-in grating is disposed on the inner side surface of the substrate or the outer side surface of the substrate.

In a possible implementation, the height of the out-coupling grating in the second direction is in the range of 5mm to 15 mm.

In the present application, the height of the out-coupling grating may have an influence on the range of the outgoing light field of view, e.g. the range of the outgoing light field of view may increase with increasing height. By way of example, the height may be in the range of 8mm to 15 mm. Although increasing the height of the out-coupling grating can expand the range of the field of view of the outgoing light, too large out-coupling gratings can obstruct the field of view of the user when viewing a real scene. The height can be adjusted according to actual needs, and the application is not limited to this.

In one possible implementation manner, the optical waveguide sheet includes a light reflecting layer or a light shielding layer, and the light reflecting layer or the light shielding layer is disposed on the outer side of the optical waveguide sheet; the reflective layer can reflect the light emitted from the outer side of the optical waveguide sheet to make the light enter the grating again, so that the light is repeated, the light emitted from the outer side of the optical waveguide sheet is effectively reduced, the light propagation efficiency is improved, and the brightness of the virtual image is increased. The shading layer can absorb light emitted from the outer side of the optical waveguide sheet, so that display light is prevented from being transmitted to the outer side of the electronic equipment, other people positioned in front of the visual field of the user cannot see the virtual image, privacy leakage is prevented, and the privacy of the user is effectively protected.

In a possible implementation, the upper side of the optical waveguide sheet is provided with a light shielding layer, so that ambient light is prevented from entering from the upper side of the optical waveguide sheet, and the display of the virtual image is prevented from being influenced.

In one possible implementation, the light reflecting layer or the light shielding layer is disposed on the outer side of the optical waveguide sheet, and the light shielding layer is disposed on the upper side of the optical waveguide sheet.

In one possible implementation, the optical waveguide sheet includes an optical waveguide body having an exit surface, and an optical element fixed to the exit surface for deflecting the exit light downward. The optical element adopts a prism structure and is used for changing the emergent direction of light rays so as to deflect the light rays emitted from the emergent surface downwards to form emergent light.

In this application, the second out-coupling grating of the out-coupling grating in the first embodiment may be omitted by changing the optical path by the optical element. It can be appreciated that the size of the optical element in the second direction is generally smaller than that of the second out-coupling grating, so that the size of the out-coupling grating can be further reduced, the upper frame of the electronic device can be designed to be narrower, and the optical element is closer to the appearance of glasses used daily, so that the optical element is convenient for users to wear for a long time in daily scenes.

In one possible implementation, the number of optical waveguide sheets is plural, and the plural optical waveguide sheets are stacked. It is understood that the light rays may have different wavelength bands, and that the transmission speeds of the light rays of the different wavelength bands in the optical waveguide sheet are different. Illustratively, at least one of the plurality of optical waveguide sheets has a refractive index that is different from the refractive index of the other optical waveguide sheets. The plurality of optical waveguide sheets with different refractive indexes are arranged to respectively process light rays with different wave bands so as to avoid image distortion and ensure the display quality of images.

In other implementations, the refractive indices of the plurality of optical waveguide sheets may also be the same as each other, and there is at least one optical waveguide sheet having a different grating structure than the other optical waveguide sheets, i.e., a different structure of the in-coupling grating, the out-coupling grating, and/or the relay grating. The grating structure can be designed corresponding to light rays of different wave bands, so that a plurality of optical waveguide sheets with different grating structures can respectively process the light rays of different wave bands.

In a possible implementation manner, the optical waveguide sheet is located above the installation space, so that the view of the upper side can be fully ensured, the view of the real scene is further enlarged, the interference to the daily activities of the user is further reduced, the wearing sense of the electronic device is closer to the glasses used daily, and more users can easily accept and wear the glasses for a long time.

In a possible implementation, the optical waveguide sheet is located outside the installation space, and the outgoing light passes through a top region of the installation space. At this time, the display light can get into user's eyes after the processing of lens, avoids the user to see virtual image clearly because of the problem in the aspect of the eyesight, influences experience sense.

In one possible implementation, the frame includes a fixing member fixedly mounted to the upper frame, and the optical waveguide sheet is fixed to the upper frame by the fixing member. The fixing member may include a top plate and a side plate. The top plate can be used for shielding the ambient light above the optical waveguide sheet, so that the influence of parasitic light on the display of the virtual image is avoided. The side plate can be used for blocking light rays from being emitted from the outer side of the optical waveguide sheet, so that the image display brightness is improved, a user can see clear virtual images in an application occasion with high ambient light brightness, power consumption is reduced, and the endurance time of the electronic equipment is prolonged.

In one possible implementation, the light emitting assembly includes a light source and an optical system for converting light from the light source into parallel light. The optical system can be arranged on one side of the light source, which is close to the first mirror frame, and is used for converting the collected light rays emitted from the light source into the light rays which are generally parallel, so that each beam of light rays in the display light rays can be emitted into the substrate at the same incident angle, and the problem that part of light rays cannot meet the condition of conduction in the optical waveguide sheet, and further cannot be transmitted to human eyes through the optical waveguide sheet, so that image distortion is caused is avoided.

In one possible implementation, the AR frame further includes a temple to which the light emitting assembly is mounted. When the frame is in an open state, the light emitting component and the optical waveguide sheet can be arranged oppositely, so that display light can be emitted into the optical waveguide sheet in a substantially vertical mode, and the position multiplexing of the light emitting component and the optical waveguide sheet can be realized, so that the size of the electronic equipment is reduced.

In one possible implementation, the AR frame further includes one or more functional devices secured to the frame and/or temple, the one or more functional devices including a microphone, and/or speaker, and/or touch screen. The AR frame can receive voice and/or action instructions of a user and execute corresponding operations according to the instructions or control external equipment to execute the corresponding operations. In the application, the AR mirror frame can realize functions of adding schedules, navigating a map, taking pictures and videos, expanding videos and voice calls and the like, and can realize wireless network access through a mobile communication network or WIFI and the like; or the communication connection with external equipment is realized through a mobile communication network, WIFI or Bluetooth and other modes.

In a second aspect, the present application further provides AR glasses, including the above AR frame and lenses, the lenses being fixedly mounted on the AR frame. The AR glasses can make the user observe virtual image and reality scene simultaneously, and this application is through setting up the optical waveguide piece at the last frame of picture frame, avoids the optical waveguide piece to cause the interference to reality scene, and when the user wore AR glasses, the AR glasses can not influence daily activity, can wear for a long time.

Drawings

FIG. 1 is a schematic diagram of an electronic device 100 provided herein in some embodiments;

FIG. 2 is a schematic diagram of the electronic device 100 of FIG. 1 in some other embodiments;

fig. 3A is a schematic view of the first frame 11 shown in fig. 1 in some embodiments;

fig. 3B is a schematic view of the first frame 11 shown in fig. 3A at another angle;

fig. 3C is a schematic view of the first frame 11 shown in fig. 3A at a further angle;

FIG. 4A is a schematic view of the structure of the optical waveguide sheet 3 shown in FIG. 3B in some embodiments provided herein;

fig. 4B is a schematic view showing an optical path of light propagating in the optical waveguide sheet 3 shown in fig. 3B;

FIG. 5 is a schematic diagram showing the optical path of light propagating in the electronic device 100 of FIG. 1;

FIG. 6 is a schematic view of the structure of the optical waveguide sheet 3 shown in FIG. 4A in some other embodiments;

FIG. 7 is a schematic view of the structure of the optical waveguide sheet 3 shown in FIG. 4A in still other embodiments;

fig. 8 is a schematic view of the structure of the optical waveguide sheet 3 shown in fig. 7 in some other embodiments;

fig. 9A is a schematic view of the structure of the optical waveguide sheet 3 shown in fig. 4A in other embodiments;

fig. 9B is a schematic view showing an optical path of light propagating in the optical waveguide sheet 3c shown in fig. 9A;

fig. 10A is a schematic view of the structure of the optical waveguide sheet 3 shown in fig. 9A in some other embodiments;

fig. 10B is a schematic view showing an optical path of light propagating in the optical waveguide sheet 3d shown in fig. 10A;

FIG. 11 is a schematic view of the structure of the optical waveguide sheet 3 shown in FIG. 4A in further embodiments;

fig. 12 is a schematic view of the structure of the optical waveguide sheet 3 shown in fig. 11 in some more embodiments;

FIG. 13 is a schematic diagram of the electronic device 100 of FIG. 3C in further embodiments;

FIG. 14 is a schematic diagram of the electronic device 100 of FIG. 3B in further embodiments;

FIG. 15 is a schematic diagram of the electronic device 100 of FIG. 1 in further embodiments;

fig. 16 is a schematic diagram of the electronic device 100 of fig. 1 in further embodiments.

Detailed Description

Embodiments of the present application are described below with reference to the accompanying drawings in the embodiments of the present application. Wherein "and/or" herein is merely an association relation describing an association object, it means that three kinds of relations may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. Furthermore, in the description of the embodiments of the present application, unless otherwise indicated, "a plurality" means two or more than two. "above" includes the present number, for example, two or more include two.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device 100 according to some embodiments. The electronic device 100 may be a smart wearable device, such as smart glasses, smart helmets, or the like. The electronic device 100 may be an in-vehicle device or the like. The smart glasses may have an independent operating system and carry a program provided by a software service provider. The intelligent glasses can realize functions of adding schedules, navigating a map, taking pictures and videos, expanding videos and voice calls and the like, and can realize wireless network access through a mobile communication network or WIFI and the like; or the communication connection with external equipment is realized through a mobile communication network, WIFI or Bluetooth and other modes. Specifically, the intelligent glasses can receive voice and/or action instructions of a user, and execute corresponding operations according to the instructions, or control the external equipment to execute the corresponding operations.

Illustratively, the smart glasses may be AR (augmented reality) glasses or MR (mixed reality) glasses. Among other things, AR glasses may implement display functionality, such as providing virtual images visible to the human eye through optical display technology. When the user wears the AR glasses, the real scene and the virtual image provided by the AR glasses can be observed at the same time, so that the user obtains sensory experience exceeding reality.

The embodiment of the present application will be described taking the electronic device 100 as an AR glasses example. The electronic device 100 can include a frame 1 and a lens 2 fixedly mounted to the frame 1.

For example, the lens 2 may be made of a transparent optical material such as glass or resin. The lens 2 may have one or more curved surfaces for changing the optical path of light, such as vision correcting lenses or the like, so that a user can obtain a clear field of view when wearing glasses. The lens 2 may be a sun lens, a polarized lens, an intelligent color-changing lens, etc. for blocking part of light and shielding strong light. Of course, the lens 2 may be a plano mirror. The number of lenses 2 may be one, or two or more. Illustratively, the lenses 2 may be mounted to two frames, respectively, each frame may mount a plurality of lenses 2, and the plurality of lenses 2 may perform different functions, respectively, such as correcting the user's vision, blocking portions of light, etc. A plurality of lenses 2 may be arranged in a stack to achieve a functional stack. For example, at least one lens 2 of the plurality of lenses 2 is detachable so as to be replaced by a lens 2 with other functions, so as to improve the applicability of the electronic device 100 to different application scenarios, thereby improving the use experience of the user.

In this embodiment, the user can match with the lenses 2 with different functions according to the needs, and the functions of vision correction, strong light shielding and the like are compatible while virtual display is realized, so that the use of the user in different scenes is facilitated.

Referring to fig. 1, the frame 1 can be unfolded to an open state (as shown in fig. 1). The frame 1 can include a first frame 11, a second frame 12, a first temple 13, and a second temple 14. The two mirror frames (11, 12) are positioned between the two mirror legs (13, 14), one ends of the two mirror frames (11, 12) which are close to each other are fixedly connected, and the other ends which are far away from each other are respectively connected with the mirror legs (13, 14). The two legs (13, 14) may also be substantially perpendicular to the frame (11, 12) (corresponding to the open state of the frame (1)), i.e. the angle between the legs (13, 14) and the upper rim of the frame (11, 12) may be substantially 90 °. At this time, the shape of the frame 1 is substantially fitted to the shape of the head of the user, and the frames (11, 12) are respectively positioned in front of the eyes of the user, so that the display light is deflected downward and enters the eyes, thereby realizing the display function of the electronic device 100.

It will be appreciated that the angle between the temple (13, 14) and the rim of the frame (11, 12) may be slightly offset from 90 degrees, such as 85 degrees, 87 degrees, 95 degrees, etc., when the frame 1 is in the open position, and that the temple (13, 14) may be considered to be perpendicular to the frame (11, 12).

Illustratively, the frame 1 may also include a frame (11 or 12) and a corresponding temple (13 or 14), i.e., the frame (11 or 12) is positioned in front of a single-sided eye when the electronic device 100 is worn by a user. When the frame 1 adopts a single frame and a single temple structure, the structure of the frame 1 can be adaptively designed with reference to the description of the structures of the two frames (11, 12) and the two temples (13, 14).

The first temple 13 and/or the second temple 14 may also be of a two-fold structure, for example. Illustratively, the first temple 13 may include a first portion and a second portion that are connected. The first and second portions may be relatively unfolded or relatively folded for easy accommodation. The first and second portions can be relatively unfolded when the frame 1 is in the open state. It is to be understood that the second temple 14 may have the same two-fold structure as the first temple 13, or may have a non-folded structure, which is not limited in this embodiment.

Illustratively, the first frame 11 may have a mounting space 20 for mounting the lens 2. The first frame 11 includes an upper frame 111 and a lower frame 112 located above the installation space 20, and the upper frame 111 and the lower frame 112 together constitute the first frame 11. It will be appreciated that references to "upper," "lower," "inner," "outer," and the like directional terms in this application are intended to describe orientations with reference to the accompanying drawings and are not intended to indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operate in a particular orientation, and are therefore not to be construed as limiting the application.

Illustratively, the frame 1 may include an optical waveguide sheet 3 and a light emitting assembly 4. The optical waveguide sheet 3 may be used to receive display light and form outgoing light, realizing a function of displaying a virtual image. The use of the optical waveguide sheet 3 in this embodiment realizes a display function, and compared with the conventional scheme using optical elements such as prisms, the volume and weight of the electronic device 100 are effectively reduced, which is beneficial to long-term wearing by users.

In addition, the optical waveguide sheet 3 can be fixed on the upper frame 111 of the first frame 11, and the outgoing light is deflected downward toward the inner side of the installation space 20, so as to avoid shielding the view of the user when observing the real scene, and prevent the interference of rainbow lines on the real scene in the view, so that the user cannot influence the daily activities when wearing the electronic device 100, and the electronic device 100 is beneficial to use in the daily scene.

Illustratively, the optical waveguide sheet 3 is disposed in the first frame 11. In other embodiments, the optical waveguide sheet 3 may also be disposed on the second frame 12. In other embodiments, the number of optical waveguide sheets 3 may be two, and the optical waveguide sheets are fixed to the upper frame 111 of the first frame 11 and the upper frame of the second frame 12, respectively. The two optical waveguides 3 may be used to display different virtual images or alternatively display virtual images to meet different demands.

Illustratively, the light emitting assembly 4 may be mounted to the first temple 13. Specifically, the first temple 13 may be provided with a receiving cavity (not shown). The opening of the accommodating cavity is positioned at one end of the first glasses leg 13 close to the first glasses frame 11. When the frame 1 is in the open state, the opening of the housing cavity faces the optical waveguide sheet 3. The light emitting component 4 can be fixedly arranged in the accommodating cavity and is used for emitting display light. When the frame 1 is in the open state, the display light emitted by the light emitting component 4 can be incident on one end of the optical waveguide sheet 3 close to the first lens leg 13, and is conducted through the optical waveguide sheet 3, propagates in a direction away from the first lens leg 13, and then is emitted from the optical waveguide sheet 3.

In this embodiment, the light emitting component 4 is installed in the accommodating cavity of the first glasses leg 13, so that light leakage can be avoided, information leakage can be prevented, and privacy of a user can be effectively protected. In addition, the interference of the ambient light to the light can be prevented, and the display effect of the virtual image is prevented from being influenced.

In this embodiment, when the frame 1 is in the open state, the light emitting component 4 and the optical waveguide sheet 3 may be disposed opposite to each other, so that the display light may be incident on the optical waveguide sheet 3 in a substantially vertical manner, and also the position multiplexing of the light emitting component 4 and the optical waveguide sheet 3 may be implemented, so as to reduce the size of the electronic device 100.

It is understood that the number of the light emitting assemblies 4 may be two, and that the two light emitting assemblies 4 are respectively mounted to the first and second temples 13 and 14. In contrast, the second temple 14 may also be provided with a second receiving cavity (not shown), and the specific arrangement of the second receiving cavity may refer to the first receiving cavity. The two light emitting assemblies 4 are correspondingly and fixedly arranged in the first accommodating cavity and the second accommodating cavity. For example, the number of the light emitting assemblies 4 may be plural, and each housing cavity may be provided with plural light emitting assemblies 4 to achieve different display effects.

In other embodiments, the lighting assembly 4 may also be fixed to the first frame 11 or the second frame 12. The frame 1 may include an optical component (not shown) for changing the optical path of the display light emitted from the light emitting component 4 so that the display light is incident on the optical waveguide sheet 3 in a substantially perpendicular manner.

It is understood that the number of the light emitting assemblies 4 may be two, and the two light emitting assemblies 4 are respectively mounted to the first frame 11 and the second frame 12. The number of the light emitting components 4 can be multiple, and each mirror frame can be provided with multiple light emitting components 4 to realize different display effects.

Illustratively, the frame 1 can further include a control chip (not shown) fixedly mounted within the first receiving cavity or the second receiving cavity. The control chip may be electrically connected to the light emitting element 4, and is used for driving the light emitting element 4 to emit light, and transmitting information to the optical waveguide sheet 3 in a light form. The control chip may be electrically connected to the plurality of light emitting assemblies 4 disposed in the first accommodating cavity and the second accommodating cavity, respectively, for controlling the plurality of light emitting assemblies 4 to alternately emit light, so that display contents may be periodically switched between left and right eyes, and eye health problems caused by long-term viewing of virtual images are avoided. In addition, the control chip can also realize communication connection with external equipment through a mobile communication network, WIFI or Bluetooth and the like, and is used for driving the external equipment to realize functions of adding schedules, map navigation, shooting pictures and videos, expanding videos, voice conversation and the like.

Illustratively, the frame 1 may also include a microphone 5, a speaker 6, a touch screen 7, and the like.

In some embodiments, the microphone 5 may be disposed at a connection portion between the first and second frames 11 and 12 and electrically connected with the control chip. The connection may be provided with a cavity for receiving the microphone 5. The microphone 5 may be used for receiving a voice command of a user, converting the voice command into an audio electric signal, and transmitting the audio electric signal to the control chip, where the control chip completes a corresponding operation according to the voice command carried by the audio electric signal. In addition, the control chip can control the external equipment to complete corresponding operation according to the voice command. Thus, in this embodiment, the user may control the electronic device 100 and/or the external device to implement the corresponding function through the voice command. Illustratively, a sound receiving hole (not shown) may be formed on the inner side of the connecting portion, so that the microphone 5 can receive more voice signals, thereby improving the recognition capability of the voice command of the user and ensuring the call quality. The number of microphones 5 may be plural, for example, two, and the present embodiment is not limited thereto.

In some embodiments, the speaker 6 may be secured to the first temple 13 and/or the second temple 14. For example, the number of speakers 6 may be two, and are respectively disposed at the ends of the first and second temples 13 and 14 remote from the frames (11, 12). The first and second temples 13 and 14 may be provided with cavities, respectively, for accommodating the speakers 6. The speaker 6 may be electrically connected to the control chip for converting the audio electrical signal from the control chip into a sound signal recognizable by human ears. When the electronic device 100 is worn by a user, the first and second temples 13, 14 extend from the sides of the frame (11, 12) to the vicinity of the ears. Thus, the speaker 6 is closer to the human ear, so that the sound signal emitted by the speaker 6 can be transmitted into the user's ear at a short distance, so that the user can hear more clearly. In addition, the speaker 6 is arranged close to the ears of the user, so that the leakage of sound signals can be prevented, and the privacy of the user can be effectively protected.

For example, the speaker 6 may transmit sound signals to the human ear in an airborne manner. At this time, the first temple 13 may be provided with a speaker hole 61 corresponding to the speaker 6. The speaker hole 61 may be located on a side of the first temple 13 adjacent to the frame (11, 12). The speaker hole 61 can increase the propagation efficiency of the sound signal so that the user can acquire the sound signal more clearly, improving the feeling of experience. The second temple 14 may also be provided with a speaker hole, for example.

In other embodiments, the speaker 6 may also adopt bone conduction technology, that is, the skull of the user and other tissues vibrate through the movement of a specific structure, and the sound signal is transmitted to the human ear by using the skull propagation mode, so that the influence of environmental factors is avoided, the sound quality is improved, and the privacy of the user is effectively protected.

The number of speakers 6 may be one, and may be provided on the first temple 13 or the second temple 14, for example. The number of speakers 6 may be three or more, for example, three, four, or the like. The plurality of speakers 6 may be provided to the first temple 13 and/or the second temple 14, respectively. The number of speakers 6 may be adjusted according to actual needs, and this is not limited in the embodiment of the present application.

For example, the number of touch screens 7 may be two, and the touch screens are respectively fixedly mounted on the sides of the first and second temples 13 and 14 away from each other, that is, the sides of the first and second temples 13 and 14 facing away from the head of the user when the user wears the electronic device 100. The touch screen 7 may be electrically connected to the control chip. The touch screen 7 may be used for receiving touch information applied to an appearance surface of the touch screen 7 by a user, converting the touch information into an electrical signal, and transmitting the electrical signal to the control chip, where the control chip completes corresponding operations according to the electrical signal or controls an external device to complete corresponding operations. The appearance surface of the touch screen 7 is the side surface of the touch screen 7 facing away from the head of the user.

In this embodiment, the appearance surface of the touch screen 7 may form a part of the side surface of the glasses leg, and smoothly transition with the side surface of the glasses leg, so as to improve the aesthetic property of the electronic device 100, and make it more approximate to the appearance of glasses worn by the user in daily life. In other embodiments, the appearance surface of the touch screen 7 may be raised relative to the outer sides of the temples, so that the user can conveniently perceive the position of the touch screen 7, and operability is improved.

The number of touch screens 7 may be one, and may be disposed on the first temple 13 or the second temple 14. The number of touch screens 7 may be three or more, for example, three, four, or the like. The plurality of touch screens 7 may be provided to the first and/or second temples 13 and 14, respectively. The number of touch screens 7 can be adjusted according to actual needs, and this embodiment of the present application is not limited thereto.

It should be understood that the second frame 12 may be the same as the first frame 11 or may be different from the first frame 11, which is not limited in the embodiment of the present application.

Referring to fig. 1 and fig. 2 together, fig. 2 is a schematic structural diagram of the electronic device 100 shown in fig. 1 in some other embodiments. In this embodiment, the frame 1 may not include the lower rim 112 to enhance the aesthetic appearance of the frame 1, which meets the consumer's demand for the product appearance. At this time, the lens 2 may be fixed to the upper frame 111.

The display principle of the electronic device 100 and the structure of the optical waveguide sheet 3 will be described in detail below taking the case where the optical waveguide sheet 3 is fixed to the first frame 11.

Referring to fig. 3A and 3B, fig. 3A is a schematic structural view of the first frame 11 shown in fig. 1 in some embodiments, and fig. 3B is a schematic structural view of the first frame 11 shown in fig. 3A at another angle. In a first embodiment, the first frame 11 may be positioned in front of the eyes of the user when the user wears the electronic device 100. At this time, the outside of the first frame 11 can be seen by the other person. As shown in fig. 3A, the first frame 11 has an appearance similar to that of a frame of ordinary glasses worn daily, and is a rounded square or oval frame, so that more users can easily accept and wear the glasses for a long time in a daily use scene.

The inner side of the first frame 11 facing the eyes of the user is shown in fig. 3B. Illustratively, the optical waveguide sheet 3 may include a substrate 33 and an in-coupling grating 31 and an out-coupling grating 32 fixed to the substrate 33. The in-coupling grating 31 and the out-coupling grating 32 may be located at both ends of the optical waveguide sheet 3, respectively, and spaced apart. The coupling-in grating 31 is used for receiving the display light, and the coupling-out grating 32 is used for emitting the emergent light.

Referring to fig. 3B and fig. 3C together, fig. 3C is a schematic view of the first frame 11 shown in fig. 3A at a further angle. In this application, when the user wears the electronic device 100, the first lens frame 11 may be disposed on the front side of the eyes, and the optical waveguide sheet 3 may be disposed above the installation space 20, so that the field of view of the upper side may be sufficiently ensured, so that the field of view of the real scene is further enlarged, the interference to the daily activities of the user is further reduced, the wearing feeling of the electronic device 100 is closer to the glasses used daily, and more users are easy to accept and wear for a long time. In this embodiment, the display light is directed to the inside of the installation space 20 by conduction and deflection of the optical waveguide sheet 3, and deflected downward, at which time the user can see the virtual image and the real scene at the same time.

For example, the outgoing light may form an angle α with the third direction Z. In the embodiment of the present application, the substrate 33 extends along a first direction X, a second direction Y is perpendicular to the first direction X, and a third direction Z is perpendicular to the direction of the lens 2, that is, the third direction Z is parallel to the optical axis direction of the lens 2.

Illustratively, the angle α may be an angle between the exit field of view centerline and the third direction Z. The angle α may be greater than 10 °, for example, the angle α may be in the range of 20 ° to 40 °. The larger the included angle α is, the larger the range of the outgoing light field in the second direction Y is, and the size of the included angle α can be adjusted as required, which is not limited in this embodiment. In the present embodiment, the area between the outgoing lights emitted from the upper and lower edges of the coupling-out grating 32 is the outgoing light field of view. The outgoing light may have an outgoing light field-of-view center line, and in this embodiment, outgoing light located in the middle of the area of the outgoing light field-of-view in the plane YZ may be used as the outgoing light field-of-view center line.

Illustratively, the out-coupling grating 32 may have a height h1 in the second direction Y. For example, the height h1 of the outcoupling grating 32 may have an influence on the extent of the exit light field in the plane YZ, e.g. the extent of the exit light field may increase with increasing height h1. By way of example, the height h1 may be in the range of 8mm to 15 mm. Although increasing the height h1 of the out-coupling grating 32 can expand the range of the field of view of the outgoing light, too large an out-coupling grating 32 can obstruct the view of the user when viewing a real scene. The height h1 may be adjusted according to actual needs, which is not limited in the embodiment of the present application.

Referring to fig. 3B and fig. 4A together, fig. 4A is a schematic structural diagram of the optical waveguide sheet 3 shown in fig. 3B in some embodiments provided in the present application. In the first embodiment, the substrate 33 may be made of a single-color or multi-color material, so that the electronic device 100 is more beautiful, and the appearance of the optical waveguide sheet 3 and the upper frame 111 are more similar to the appearance of glasses worn by the user in daily scenes, so that the user can wear the glasses in daily scenes.

For example, the coupling-in grating 31 may be disposed on an inner side surface of the substrate 33, and the extending direction may be parallel to the second direction Y, for receiving the display light and changing the propagation direction of the light to form the incident light. The incident angle of the incident light is larger than the total reflection angle of the substrate 33, so that the incident light can be totally reflected when it encounters the surface of the substrate 33. The incoupling grating 31 may be a surface relief grating, a holographic volume grating or the like.

Illustratively, the out-coupling grating 32 and the in-coupling grating 31 may be disposed on the same side of the substrate 33, i.e. the out-coupling grating 33 may also be disposed on the inner side of the substrate 33. Illustratively, the outcoupling grating 32 may also employ a surface relief grating, a holographic volume grating, or the like.

The coupling-out grating 32 may be a double-layer grating, that is, a first coupling-out grating 321 and a second coupling-out grating 322, which are stacked, respectively, for emitting light and deflecting light to form emitted light.

The first coupling-out grating 321 may be disposed on the surface of the substrate 33, and is used for emitting light and expanding the range of the field of view of the emitted light in the first direction X. A first angle θ may exist between the extending direction of the first coupling-out grating 321 and the second direction Y, for example, the first angle θ may be less than 45 °.

Referring to fig. 4B, fig. 4B is a schematic diagram illustrating an optical path of light propagating in the optical waveguide sheet 3 shown in fig. 3B, where a first angle θ may exist between the first outcoupling grating 321 and the second direction Y, so as to implement two-dimensional pupil expansion. Specifically, when the incident light propagating inside the substrate 33 encounters the first coupling-out grating 321 on the surface of the substrate 33 each time, a part of the light is emitted from the optical waveguide sheet 3, and the other part is divided into two parts, and propagates along the first direction X and the second direction Y respectively, so as to realize two-dimensional pupil expansion, so that the field of view of the emergent light is expanded in the first direction X and the second direction Y, and the field of view of the emergent light is further expanded.

Please refer to fig. 3C and fig. 4B together. The second coupling-out grating 322 is disposed on a side of the first coupling-out grating 322 facing away from the substrate 33, and the extending direction may be parallel to the first direction X, so as to deflect the light downward, so as to expand the range of the outgoing light field in the second direction Y.

The second coupling-out grating 322 can change the propagation direction of the light rays through diffraction, so that the outgoing light is deflected downwards, and the outgoing light view field is enlarged in the second direction Y, so that the light rays emitted from the optical waveguide sheet 3 positioned on the upper frame 111 can be observed by human eyes, and the technical effects of not blocking the view of the user for observing the real scene, but also seeing the virtual image are achieved, the influence on the daily activities of the user is avoided, and the long-term wearing of the user is facilitated.

Referring to fig. 4B and fig. 5, fig. 5 is a schematic diagram illustrating an optical path of light propagating in the electronic device 100 shown in fig. 1. The display light enters the coupling-in grating 31 in a direction with a small angle to the third direction Z, and forms incident light after passing through the coupling-in grating 31, and enters the substrate 33 at an incident angle larger than the total reflection angle. The incident light is totally reflected when it encounters the surface of the substrate 33 and propagates in the first direction X, encounters the outcoupling grating 32 during propagation, and exits the optical waveguide sheet 3 after passing through the outcoupling grating 32, forming outgoing light, which enters the human eye, and is directed to the inside of the installation space 20 and deflected downwards.

For example, the display light entering the optical waveguide sheet 3 may have an angle with the third direction Z, which may be smaller than 10 °. It can be appreciated that when the coupling-in grating 31 is disposed on the outer side surface of the substrate 33, the display light is incident on the substrate 33 in a substantially vertical direction, so that reflection of the incident light by the substrate 33 can be avoided and the light propagation efficiency can be improved.

In this embodiment, the substrate 33 may be a transparent optical material in a long strip shape and have a total reflection angle. Light is shown to be incident on the substrate 33 from the air, and if the incident angle of the light incident on the substrate 33 is greater than or equal to the total reflection angle, then when the incident light encounters the inner side or the outer side of the substrate 33 while propagating along the substrate 33, total reflection can occur, and the light continues to propagate to the other side at the same incident angle, so that the light propagates in the substrate 33 along the first direction X in a zigzag manner. In addition, the incident light is not damaged and leaked during propagation in the substrate 33, thereby avoiding distortion of an image and improving brightness of the image.

Illustratively, the first out-coupling grating 321 of the out-coupling grating 32 may implement expansion of the field of view of the outgoing light by a one-dimensional pupil expansion technique, so as to be compatible with more people with different pupil sizes. Specifically, each time the incident light propagating inside the substrate 33 encounters the first outcoupling grating 321 on the surface of the substrate 33, a part of the light exits the optical waveguide sheet 3 under the diffraction effect of the grating, and another part of the light continues to propagate in the substrate 33 in the original manner in a zigzag manner until the next time it encounters the first outcoupling grating 321 on the surface of the substrate 33, and so on, so as to achieve an expansion of the field of view of the outgoing light in the first direction X.

Referring to fig. 1 and 5 together, the light emitting assembly 4 may include a light source 41 and an optical system 42. The optical system 42 may be installed on a side of the light source 41 near the first lens frame 11, and is configured to convert the collected light emitted from the light source 41 into substantially parallel light, so that each beam of light in the display light can be incident into the substrate 33 at the same incident angle, and the problem that a part of light cannot meet the condition of being conducted in the optical waveguide sheet 3, and further cannot be transmitted to human eyes through the optical waveguide sheet 3, and image distortion is caused is avoided.

In this embodiment, the light source 41 may be an LCOS (liquid crystal on silicon ) display screen, an OLED (organic light-emitting diode) display screen, a micro led display screen, an LCD display screen, or the like, which is not limited in this embodiment, and may be selected according to the requirements of parameters such as definition and brightness of the virtual image. In addition, the optical system 42 may include an optical structure such as a prism, a lens 2, or the like. The optical structure can have the functions of changing the light path, splitting light, filtering and screening light, etc. It will be appreciated that the optical system 42 may include one or more optical structures for processing light rays emitted from the light source 41 to obtain substantially parallel incident light rays.

Referring to fig. 4A and fig. 6 together, fig. 6 is a schematic structural diagram of the optical waveguide sheet 3 shown in fig. 4A in some other embodiments. For example, the second out-coupling grating 322 may include a plurality of optical members disposed parallel to each other and spaced apart from each other. The extending directions of the plurality of optical members may be parallel to the first direction X, or a second included angle β may exist between the extending directions and the first direction X, and the second included angle β may be smaller than 20 °.

Illustratively, the out-coupling grating 32 may also employ a single layer grating, in which case the single layer grating may have a two-dimensional grating structure, while achieving both light extraction and deflection, to reduce the size of the out-coupling grating 32. The coupling-out grating 32 may also be a three-layer grating, which is not limited in this embodiment.

Referring to fig. 7, fig. 7 is a schematic view of the structure of the optical waveguide sheet 3 shown in fig. 4A in still other embodiments. In the second embodiment, the optical waveguide sheet 3a may include a substrate 33a, an in-coupling grating 31a, and an out-coupling grating 32a. Most of the structure of the optical waveguide sheet 3a can be referred to the first embodiment, and will not be described here. In this embodiment, the optical waveguide sheet 3a may have a reflective structure, that is, the in-coupling grating 31a and the out-coupling grating 32a may be disposed outside the substrate 33 a. The optical waveguide sheet 3a may include a light reflecting layer or a light shielding layer, and the light reflecting layer or the light shielding layer may be provided outside the optical waveguide sheet 3a, that is, outside the coupling-in grating 31a and the coupling-out grating 32a. The optical waveguide sheet 3a may not include a light reflecting layer or a light shielding layer, and this embodiment is not limited thereto.

Referring to fig. 8, fig. 8 is a schematic diagram of the optical waveguide sheet 3 shown in fig. 7 in some other embodiments. In the third embodiment, the optical waveguide sheet 3b may include a substrate 33b, an in-coupling grating 31b, and an out-coupling grating 32b. The optical waveguide sheet 3b may be described in the first embodiment, and will not be described herein. In this embodiment, the optical waveguide sheet 3b may have a transmissive structure, that is, the in-coupling grating 31b and the out-coupling grating 32b may be disposed on the inner side of the substrate 33 b.

Referring to fig. 9A, fig. 9A is a schematic structural view of the optical waveguide sheet 3 shown in fig. 4A in other embodiments. In the fourth embodiment, the optical waveguide sheet 3c may include a substrate 33c, an in-coupling grating 31c, an out-coupling grating 32c, and a relay grating 34c. The first embodiment may be referred to for most of the structures and positional relationships of the optical waveguide sheet 3c, and will not be described herein. The coupling-out grating 32c may be disposed on an inner side of the substrate 33c, and the coupling-in grating 31c may be disposed on an inner side of the substrate 33 c. In the present embodiment, the relay grating 34c may be located on the outer side surface of the substrate 33c and disposed opposite to the coupling-in grating 32 c. The relay grating 34c is used to change the propagation direction of the light so that it can be emitted from the substrate 33 c.

For example, the relay grating 34c may have a third angle θ1 with the second direction Y, to expand the range of the outgoing light field of view in the first direction X and the second direction Y. Illustratively, the third included angle θ1 may be less than 45 °, e.g., 15 °,30 °, etc., to achieve expansion of the outgoing light field of view in the first direction X and the second direction Y.

Specifically, referring to fig. 9A and 9B together, fig. 9B is a schematic view showing an optical path of light propagating in the optical waveguide sheet 3c shown in fig. 9A. The relay grating 34c also serves to expand the range of the outgoing light field of view in the first direction X. It will be appreciated that after the incident light encounters the relay grating 34c, a portion of the light rays will change in direction of propagation and emerge from the substrate 33c, and another portion will continue to propagate along the first direction X-ray fold line within the substrate 33c until the incident light encounters the relay grating 34c again, and the above process is repeated to achieve an expansion of the field of view of the exiting light in the first direction X.

In the fourth embodiment, the display light rays are incident on the substrate 33c, and after encountering the coupling-in grating 31c, change direction, forming incident light. The incident light propagates in the substrate 33c along the first direction X-ray line. After encountering the relay grating 34c during the incident light propagation, the propagation range is widened, and the incident light propagates in the first direction X and the second direction Y, respectively, and after encountering the coupling-out grating 32c, the incident light exits the substrate 33c and deflects downward to form the outgoing light. The other part continues to propagate in the original manner along the first direction X-ray line until encountering the relay grating 34c again, and so on repeatedly, so as to transmit the display light to human eyes, thereby implementing the display function of the electronic device 100.

Referring to fig. 10A and 10B together, fig. 10A is a schematic structural view of the optical waveguide sheet 3 shown in fig. 9A in some other embodiments, and fig. 10B is a schematic optical path diagram showing light propagating in the optical waveguide sheet 3d shown in fig. 10A. In the fifth embodiment, the optical waveguide sheet 3d may include a substrate 33d, an in-coupling grating 31d, an out-coupling grating 32d, and a relay grating 34d. The most structure of the optical waveguide sheet 3d can be referred to the fourth embodiment, and will not be described here. In this embodiment, the coupling-in grating 31d and the coupling-out grating 32d may be disposed on two sides of the substrate 33d, respectively, that is, the coupling-in grating 31d may be disposed on the outer side of the substrate 33 d.

Referring to fig. 11, fig. 11 is a schematic view of the structure of the optical waveguide sheet 3 shown in fig. 4A in some embodiments. In the sixth embodiment, the optical waveguide sheet 3e may include an optical waveguide body 33e and an optical element 35e. The optical waveguide body 33e may include a substrate 33e, an in-coupling grating (not shown), and an out-coupling grating 32e. The optical waveguide sheet 3e may be described in the first embodiment, and will not be described herein. The optical waveguide body 33e has an emission surface to which the optical element 35e can be fixed. The optical element 35e may adopt a prism structure for changing the outgoing direction of the light rays, so that the light rays emitted from the outgoing surface are deflected downward to form outgoing light.

In this embodiment, the second coupling-out grating of the coupling-out grating 32e in the first embodiment can be omitted by changing the optical path through the optical element 35 e. It is appreciated that the size of the optical element 35e in the second direction Y is generally smaller than that of the second out-coupling grating, so that the size of the out-coupling grating 32e can be further reduced, so that the upper frame of the electronic device 100 can be designed to be narrower and closer to the appearance of glasses for daily use, and the user can wear the glasses in a daily scene for a long time.

In this embodiment, the out-coupling grating 32e may be used to eject light and achieve an expansion of the field of view of the ejected light in the first direction X. In other embodiments, the coupling-out grating 32e may also deflect the outgoing light, and further correct the outgoing direction of the outgoing light through the optical element 35e, so as to more precisely control the outgoing direction and improve the display effect of the virtual image.

Referring to fig. 12 together, fig. 12 is a schematic view of the structure of the optical waveguide sheet 3 shown in fig. 11 in some more embodiments. In the seventh embodiment, most of the structure of the optical waveguide sheet 3f can be referred to the sixth embodiment, and will not be described here. In the present embodiment, the optical element 35f may include a plurality of prism structures connected to each other, and inclined surfaces of the plurality of prisms are parallel to each other. As can be appreciated, the prism deflects the light mainly through oblique planes, and the present embodiment deflects the light through a plurality of prisms, so that the size of the optical element 35f in the third direction Z is effectively reduced, and the size of the optical waveguide sheet 3f is further reduced, so that the appearance of the electronic device 100 is closer to glasses used daily.

In the embodiment of the present application, the number of the optical waveguide sheets 3 may be three or more, for example, three, five, or the like, by way of example. The plurality of optical waveguide sheets 3 may be stacked and fixed to the same frame, for example, the upper frame 111 of the first frame 11 or the upper frame of the second frame 12. The plurality of optical waveguide sheets 3 are fixedly connected and connected in series with each other. At least one optical waveguide sheet 3 among the plurality of optical waveguide sheets 3 has a refractive index different from that of the other optical waveguide sheets 3. It is understood that the light rays may have different wavelength bands, and that the transmission speeds of the light rays of different wavelength bands in the optical waveguide sheet 3 are different. The plurality of optical waveguide sheets 3 with different refractive indexes are arranged to respectively process light rays with different wave bands so as to avoid image distortion and ensure the display quality of images.

In other embodiments, the refractive indices of the plurality of optical waveguide sheets 3 may also be the same as each other, and there is at least one optical waveguide sheet 3 that differs from the grating structure of the other optical waveguide sheets 3, i.e. the structure of the in-coupling grating 31, the out-coupling grating 32 and/or the relay gratings (34 c,34 d) is different. The grating structure can be designed corresponding to light rays of different wavebands, so that a plurality of optical waveguide sheets 3 with different grating structures can respectively process the light rays of different wavebands.

Referring to fig. 13, fig. 13 is a schematic structural diagram of the electronic device 100 shown in fig. 3C in further embodiments. Illustratively, the optical waveguide sheet 3 may be located outside the installation space 20, and the outgoing light may pass through a top region of the installation space 20. At this time, the display light can enter the eyes of the user after being processed by the lens 2, so that the problem that the user cannot see the virtual image due to the vision problem is avoided, and the experience is prevented from being influenced.

The first frame 11 may include a fixing member 113 fixedly mounted to the upper frame 111. Specifically, the optical waveguide sheet 3 may be fixedly mounted to the inner side surface of the fixing member 113. The fixing member 113 may be a semi-wrapping structure, that is, may include a top plate 1131 and a side plate 1132 that are fixedly connected, where the top surface of the top plate 1131 may be smoothly transited with the top surface of the upper frame 111, and the side plate 1132 may be disposed opposite to the installation space 20. The optical waveguide sheet 3 is located between the side plate 1132 and the upper frame 111, and is fixedly connected to the side plate 1132 and the top plate 1131. At this time, the optical waveguide sheet 3 may be located outside the installation space 20.

For example, the fixing member 113 may not include the top plate 1131, and the side plate 1132 may be fixedly connected to a side edge of the first frame 11 through a structural member (not shown). The upper side of the optical waveguide sheet 3 may be provided with a light shielding layer to prevent ambient light from entering from the upper side of the optical waveguide sheet 3, which affects the display of the virtual image. At this time, the optical waveguide sheet 3 may be located outside or above the installation space 20.

Illustratively, the fixing member 113 may not include the side plate 1132, and the optical waveguide sheet 3 may be fixedly coupled with the top plate 1131. At this time, the optical waveguide sheet 3 may be located outside the installation space 20. The optical waveguide sheet 3 may include a light reflecting layer or a light shielding layer, and the light reflecting layer or the light shielding layer may be provided outside the optical waveguide sheet 3. In the embodiment of the present application, when the outer side of the substrate 33 is provided with the in-coupling grating 31 and/or the out-coupling grating 32, the outer side of the optical waveguide sheet 3 may refer to the outer side of the in-coupling grating 31 and/or the out-coupling grating 32. When the outer side of the substrate 33 is not provided with the in-coupling grating 31 and/or the out-coupling grating 32, the outer side of the optical waveguide sheet 3 may refer to the outer side of the substrate 33.

It is understood that the grating for emitting light has the effect of changing the propagation direction of the light after diffraction and forming two light beams having propagation directions symmetrical to the grating, that is, two light beams are emitted from the inner side and the outer side of the optical waveguide sheet 3, respectively. The reflective layer can reflect the light emitted from the outer side of the optical waveguide sheet 3 to make the light enter the grating again, so that the light is repeated, the light emitted from the outer side of the optical waveguide sheet 3 is effectively reduced, the light propagation efficiency is improved, and the brightness of the virtual image is increased. The light shielding layer can absorb the light emitted from the outer side of the optical waveguide sheet 3, so as to prevent the display light from propagating to the outer side of the electronic device 100, so that other people positioned in front of the user's field of view cannot see the virtual image, thereby preventing privacy disclosure and effectively protecting the user's privacy.

For example, the fixing member 113 may not include the top plate 1131 and the side plate 1132. At this time, the optical waveguide sheet 3 may be located outside or above the installation space 20. The fixing member 113 may fix the optical waveguide sheet 3 to the upper frame 111 by fastening means such as a buckle. The upper side of the optical waveguide sheet 3 may be provided with a light shielding layer, and the optical waveguide sheet 3 may include a light reflecting layer or a light shielding layer, which may be provided at the outer side of the optical waveguide sheet 3. According to the embodiment of the application, the top plate 1131 and/or the side plate 1132 are omitted, the volume of the fixing piece 113 is reduced, the appearance of the electronic equipment 100 is more similar to that of glasses used daily, and the use of a user in a daily scene is facilitated. In addition, the weight of the electronic device 100 is reduced, facilitating long-term wear by the user.

Illustratively, the side plate 1132 and/or the top plate 1131 may be made of a material having a light transmittance of approximately zero, and the top plate 1131 may be used to block the ambient light above the optical waveguide sheet 3, so as to avoid the influence of stray light on the display of the virtual image. The side plate 1132 may be used to block light from exiting the outside of the optical waveguide sheet 3, so as to improve the image display brightness, and enable a user to see a clear virtual image in an application occasion with high ambient light brightness, thereby reducing power consumption and prolonging the endurance time of the electronic device 100. It is appreciated that the side plates 1132 and/or the top plate 1131 may be made of a material having a light transmittance greater than zero, which is not limited in this application.

For example, the side panels 1132 and/or top panel 1131 may employ a light transmittance adjustable material, such as a photochromic material, electrochromic material, or the like. The light transmittance can be reduced with the increase of the ambient light intensity, so that the light emitted from the outside of the optical waveguide sheet 3 can be reduced, the image display brightness can be improved, the power consumption can be reduced, and the endurance time of the electronic device 100 can be prolonged.

For example, the light transmittance may also be changed as needed, for example, the electronic device 100 is in a display state, and the driving chip reduces the light transmittance by changing the voltage applied to the side plate 1132 and/or the top plate 1131, and improves the brightness of the display image; when the electronic device 100 is in the non-display state, the driving chip increases the light transmittance by changing the voltage applied to the side plate 1132 and/or the top plate 1131, so that the appearance of the electronic device 100 is more similar to that of glasses for daily use, and the use of the electronic device in daily scenes is facilitated for users.

In other embodiments, the side plate 1132 and/or the top plate 1131 may also use a material with a fixed light transmittance, or a material with a light transmittance gradually changing along the second direction Y, which is not limited in this application.

Referring to fig. 5 and fig. 14 together, fig. 14 is a schematic structural diagram of the electronic device 100 shown in fig. 3B in further embodiments. The size of the out-coupling grating 32 in the first direction X affects the extent of the field of view of the outgoing light in the first direction X, and the size of the out-coupling grating 32 in the first direction X can be adjusted as desired. For example, the size of the out-coupling grating 32 in the first direction X may be reduced, so that the optical waveguide sheet 3 has less influence on the appearance of the electronic device 100 and is more acceptable to consumers.

Referring to fig. 15, fig. 15 is a schematic structural diagram of the electronic device 100 shown in fig. 1 in further embodiments. For example, the electronic device 100 may not include the lens 2, which is not limited in the embodiment of the present application.

Referring to fig. 16, fig. 16 is a schematic structural diagram of the electronic device 100 shown in fig. 1 in further embodiments. For example, the frame 1 may not include a temple, and the frame (one or two) may be placed in front of the eyes of the user in the form of a strap, an adjusting strap, or the like to achieve the display function, or may be used in a stacked manner with the glasses of the user, for example, the frame 1 may be mounted on the inner side or the upper side of the frame of the glasses. The interaction mode between the frame 1 and the user is not limited in this embodiment, and the frame may be placed in front of the human eye.

The foregoing description is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and should be covered in the scope of the present application; embodiments of the present application and features of embodiments may be combined with each other without conflict. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (16)

1. An AR frame, comprising:

the light-emitting component is used for emitting display light;

a lens frame having an installation space for installing lenses, the lens frame including an upper rim above the installation space; the method comprises the steps of,

the optical waveguide sheet is fixed on the upper frame and is used for receiving the display light rays and forming emergent light, and the emergent light irradiates the inner side of the installation space and deflects downwards; wherein,

the optical waveguide sheet comprises a substrate, and a coupling-in grating and a coupling-out grating which are fixed on the substrate, wherein the coupling-in grating and the coupling-out grating are respectively positioned at two ends of the optical waveguide sheet, the coupling-in grating is used for receiving the display light, the coupling-out grating is used for emitting the emergent light, an included angle is formed between the emergent light and a third direction, and the third direction is a direction perpendicular to the lens;

the plurality of out-coupling gratings comprise a first out-coupling grating and a second out-coupling grating which are arranged in a stacked mode, the second out-coupling grating is located on one side, back to the substrate, of the first out-coupling grating, an included angle exists between the first out-coupling grating and the second out-coupling grating, and the substrate extends along a first direction.

2. The AR frame of claim 1, wherein the included angle is greater than 10 °.

3. The AR frame of claim 1, wherein the first out-coupling grating has a first angle with a second direction, the first angle being less than 45 °, the second direction being perpendicular to the first direction.

4. The AR frame of claim 1, wherein the second out-coupling grating has a second angle with the first direction, the second angle being less than 20 °.

5. The AR frame of claim 1, wherein the optical waveguide sheet comprises a relay grating disposed on an inner side of the substrate, the relay grating disposed on an outer side of the substrate opposite the coupling grating, the coupling grating disposed on either the inner side of the substrate or the outer side of the substrate.

6. The AR frame of claim 3, wherein a height of the out-coupling grating in the second direction is in a range of 5mm to 15 mm.

7. The AR frame according to any one of claims 1 to 6, wherein the optical waveguide sheet comprises a light reflecting layer or a light shielding layer, the light reflecting layer or the light shielding layer being provided outside the optical waveguide sheet;

And/or, the upper side of the optical waveguide sheet is provided with a shading layer.

8. The AR frame according to any one of claims 1 to 6, wherein the optical waveguide sheet comprises an optical waveguide body having an exit face and an optical element fixed to the exit face, the optical element for deflecting the exit light downward.

9. The AR frame according to any one of claims 1 to 6, wherein the number of the optical waveguide sheets is plural, and a plurality of the optical waveguide sheets are stacked.

10. The AR frame according to any one of claims 1 to 6, wherein the optical waveguide sheet is located above the installation space.

11. The AR frame according to any one of claims 1 to 6, wherein the optical waveguide sheet is located outside the installation space, and the outgoing light passes through a top region of the installation space.

12. The AR frame according to claim 10 or 11, wherein the frame includes a fixing member fixedly mounted to the upper rim, and the optical waveguide sheet is fixed to the upper rim by the fixing member.

13. The AR frame of any one of claims 12, wherein the light assembly comprises a light source and an optical system for converting light from the light source into parallel light.

14. The AR frame of any one of claims 13, further comprising a temple, the light emitting assembly being mounted to the temple.

15. The AR frame of claim 14, further comprising one or more functional devices secured to the frame and/or temple, the one or more functional devices including a microphone, and/or speaker, and/or touch screen.

16. AR glasses comprising a frame as claimed in any one of claims 1 to 15 and lenses fixedly mounted to the frame.