Display assembly and near-to-eye display equipment

Abstract

The invention provides a display assembly and a near-to-eye display device, the display assembly comprises an optical waveguide, a reflector assembly and an image source, when the reflector assembly is in a first deflection state, the reflector assembly reflects imaging light emitted by the image source to a coupling area of the optical waveguide; imaging light is coupled into the optical waveguide, so that a near-to-eye display function of the display component can be realized; when the reflector assembly is in the second deflection state, the reflector assembly reflects the imaging light to the outside of the side edge of the optical waveguide, and when the imaging light reaches an imaging carrier such as a wall, the imaging light can be projected and imaged on the imaging carrier. By arranging the display assembly capable of changing the deflection state, the display assembly has two functions of near-to-eye display and projection imaging.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical technology, in particular to a display assembly and a near-eye display device. BACKGROUND

[0002] With the rapid development of virtual reality, augmented reality and mixed reality technologies, the near-eye display device as the core interactive interface has gradually become a research hotspot in the consumer electronics and industrial fields. Such devices usually exist in the form of head-mounted displays and the like, and provide users with immersive virtual visual experience or augmented visual information by directly projecting images to the eyeballs of the users.

[0003] However, the images of the near-eye display device in the prior art can usually only be viewed by the individual user, and it is difficult to quickly share the image information with other users. SUMMARY

[0004] The present application provides a display assembly and a near-eye display device, aiming to enable the display assembly to have both near-eye display and projection imaging functions.

[0005] In a first aspect, the present application provides a display assembly, comprising:

[0006] a light waveguide having a coupling-in region;

[0007] a mirror assembly for reflecting light;

[0008] an image source for emitting imaging light to the mirror assembly;

[0009] The mirror assembly can be in a first deflection state and a second deflection state; when the mirror assembly is in the first deflection state, the mirror of the mirror assembly reflects the imaging light to the coupling-in region and couples the imaging light into the light waveguide; when the mirror assembly is in the second deflection state, the mirror of the mirror assembly reflects the imaging light to the outside of the side edge of the light waveguide and projects the imaging light.

[0010] In the above technical solution, when the mirror assembly is in the first deflection state, the mirror assembly reflects the imaging light to the coupling-in region, and the imaging light coupled into the light waveguide can realize the near-eye display function of the display assembly; when the mirror assembly is in the second deflection state, the mirror assembly reflects the imaging light to the outside of the side edge of the light waveguide, and the imaging light can project an image on an imaging carrier such as a wall when the imaging light reaches the imaging carrier; by setting the display assembly with variable deflection states, the display assembly is enabled to have both near-eye display and projection imaging functions.

[0011] In a possible implementation, the mirror assembly comprises a first mirror that can be deflected and adjusted, and the image source is configured to emit the imaging light to the first mirror.

[0012] The in-coupling region is located at one side of the optical waveguide, and the first mirror and the image source are located at the side of the optical waveguide where the in-coupling region is located,

[0013] When the mirror assembly is in the first deflection state, the first mirror is deflected to a first deflection angle, and the first mirror is configured to reflect the imaging light and cause the imaging light to be incident to the in-coupling region;

[0014] When the mirror assembly is in the second deflection state, the first mirror is deflected to a second deflection angle, and the first mirror is configured to reflect the imaging light and cause the imaging light to propagate from outside the side edge of the optical waveguide to a side of the optical waveguide facing away from the first mirror and project an image.

[0015] In a possible implementation, the first mirror is configured to:

[0016] When the mirror assembly is in the first deflection state, the first mirror is configured to reflect the imaging light and cause the imaging light to be incident to the in-coupling region at a predetermined angle.

[0017] In a possible implementation, the mirror assembly further comprises a second deflectable mirror; the second mirror is located downstream of the first mirror in the light path of the imaging light, and the second mirror is located outside the side edge of the optical waveguide.

[0018] The second mirror is configured to, when the mirror assembly is in the second deflection state, reflect the imaging light reflected by the first mirror and cause the imaging light to propagate to a side of the optical waveguide facing away from the first mirror in a direction parallel to the perpendicular incidence to the in-coupling region.

[0019] In a possible implementation, the first mirror is configured to:

[0020] When the mirror assembly is in the second deflection state, the first mirror is configured to reflect the imaging light and cause the imaging light to propagate to a side of the optical waveguide facing away from the first mirror in a direction parallel to the perpendicular incidence to the in-coupling region.

[0021] In a possible implementation, the mirror assembly further comprises a third deflectable mirror, and the third mirror is arranged between the first mirror and the in-coupling region in the light path of the imaging light.

[0022] The third mirror is configured to reflect the imaging light and make the imaging light incident to the coupling-in region at a set angle when the mirror assembly is in the first deflection state.

[0023] In a possible implementation, the image source is a projection image source or a non-projection image source.

[0024] In a possible implementation, when the image source is a non-projection image source, the display assembly further includes a lens assembly, the lens assembly is located on the propagation path of the imaging light and downstream of the first mirror or between the first mirror and the image source when the mirror assembly is in the second deflection state.

[0025] When the mirror assembly is in the second deflection state, the imaging light passes through the lens assembly between the image source and the first mirror, or the imaging light is reflected by the first mirror and then projected and imaged by the lens assembly.

[0026] In a possible implementation, the display assembly further includes a gyroscope and a control module.

[0027] When the mirror assembly is in the second deflection state, the gyroscope is configured to detect the motion state of the image source and / or the mirror assembly.

[0028] The control module is configured to control the deflection of the mirrors in the mirror assembly and / or the image source according to the detection result of the gyroscope, so that the imaging light is projected and imaged at a specific position.

[0029] In a second aspect, the present application provides a near-eye display device, including a device body and a display assembly as described above arranged on the device body.

[0030] The display assembly of the near-eye display device described above, when the mirror assembly is in the first deflection state, the mirror assembly reflects the imaging light to the coupling-in region, and the imaging light is coupled into the optical waveguide to realize the near-eye display function of the display assembly; when the mirror assembly is in the second deflection state, the mirror assembly reflects the imaging light to the side edge of the optical waveguide, and the imaging light is projected and imaged on an imaging carrier such as a wall when the imaging light reaches the imaging carrier; by setting the display assembly with variable deflection states, the display assembly has both near-eye display and projection imaging functions. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings needed to be used in the embodiments. The drawings incorporated into the specification and form a part of the specification, which show the embodiments consistent with the present disclosure, and are used to explain the technical solutions of the present disclosure together with the specification. It should be understood that the following drawings only show some of the embodiments of the present disclosure, and therefore should not be considered as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0032] Figure 1 One of the display assembly schematic diagrams in the embodiments of the present application;

[0033] Figure 2 The second display assembly schematic diagram in the embodiments of the present application;

[0034] Figure 3 The third display assembly schematic diagram in the embodiments of the present application. DETAILED DESCRIPTION

[0035] In order to make the purposes, technical solutions and advantages of the present application more clear, the following will further describe the present application in detail with reference to the drawings.

[0036] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in one or more embodiments of the present disclosure should be understood as the general meaning understood by those skilled in the art to which the present disclosure belongs. The terms "first", "second" and the like used in one or more embodiments of the present disclosure do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and the like mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connected" or "connected" and the like are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] In order to facilitate the understanding of the display assembly and near-eye display device provided by the embodiments of the present application, the application scenario thereof will be first described. The display assembly provided by the embodiments of the present application can be applied to the near-eye display device, and can be especially applied to the augmented reality near-eye display device, such as augmented reality glasses and the like.

[0038] With the rapid development of virtual reality, augmented reality and mixed reality technologies, near-eye display devices, as the core interactive interface, have gradually become a research hotspot in the consumer electronics and industrial fields. Such devices, usually in the form of head-mounted displays, provide users with immersive virtual visual experience or augmented visual information by projecting images directly into the user's eyes.

[0039] However, the images of the near-eye display devices in the prior art can only be viewed by the individual user, and it is difficult to quickly share image information with other users.

[0040] Therefore, the display assembly and the near-eye display device are provided to realize the near-eye display and projection imaging functions. The near-eye display device is described in detail below with reference to the accompanying drawings.

[0041] Reference Figure 1 , Figure 1 As shown in FIG. 1, the near-eye display device includes a light waveguide 1, a mirror assembly 2 and an image source 3. The image source 3 is configured to emit imaging light, and the mirror assembly 2 is configured to reflect the imaging light. The light waveguide 1 is configured to propagate the imaging light when the imaging light is incident on the light waveguide 1 and to form an image in the human eye, thereby realizing the near-eye display function of the display assembly.

[0042] Specifically, the light waveguide 1 has a coupling-in region 11 and a coupling-out region 12. The coupling-in region 11 can be provided with a coupling-in grating, and the coupling-out region 12 can be provided with a coupling-out grating. When the imaging light is incident on the coupling-in region 11, the light can enter the interior of the light waveguide 1 through the coupling-in grating and propagate by total internal reflection in the interior of the light waveguide 1. When the light propagates in the light waveguide 1 to the coupling-out region 12, part of the light is coupled out through the coupling-out grating each time the light is reflected to the coupling-out grating. The light coupled out from the coupling-out grating reaches the human eye and forms an image in the human eye, thereby realizing the near-eye display function of the display assembly.

[0043] The image source 3 is configured to emit imaging light to the mirror assembly 2. Specifically, the image source 3 can be a projection image source 3 or a non-projection image source 3. The imaging light emitted by the image source 3 to the mirror assembly 2 can reach the light waveguide 1 after being reflected by the mirror assembly 2 and be directly imaged in the human eye, or reach an imaging carrier 4 in the environment for projection imaging.

[0044] The near-eye display function and the projection function in the embodiments of the present application are distinguished concepts. The near-eye display function of the display assembly refers to that the light directly enters the human eye to form an image after being adjusted by the display assembly. The projection function refers to that the light first reaches an imaging carrier 4 having a certain distance from the display assembly, and then enters the human eye to form an image after being reflected by the imaging carrier 4. As an example, for an augmented reality glasses, when the near-eye display function is implemented, the imaging light is directly incident on the human eye after being adjusted by the lens of the glasses. Generally, only the wearer of the glasses can see the imaging content. When the projection function is implemented, the imaging light is projected on an imaging carrier 4 outside the glasses to form an image. At this time, not only the wearer of the glasses can see the imaging content, but also the user who does not wear the glasses can observe the imaging content, so that the sharing of the imaging content is realized by using the augmented reality glasses.

[0045] It should be noted that the imaging carrier 4 is located in the environment of the user, which can be a wall, a desktop, a projection screen or various objects having a certain distance from the display assembly. However, it should be understood that the surface of the object used for projection imaging should have a certain ability to reflect light. The imaging light enters the human eye to form an image after being reflected by the imaging carrier 4, that is, the projection function of the display assembly is realized.

[0046] The mirror assembly 2 in the embodiments of the present application can be in a first deflection state and a second deflection state. Under certain conditions, the mirror assembly 2 can be switched between the first deflection state and the second deflection state. When the mirror assembly 2 is specifically arranged, the mirror assembly 2 can include one mirror or two mirrors or multiple mirrors, and at least one mirror can be deflected and adjusted. When the mirror assembly 2 includes one mirror, the first deflection state and the second deflection state of the mirror assembly 2 refer to the deflection state of the one mirror. When the mirror assembly 2 includes two or more mirrors, the first deflection state and the second deflection state of the mirror assembly 2 refer to the deflection state of all the mirrors in the mirror assembly 2, that is, the deflection state of all the mirrors in the mirror assembly 2 collectively constitutes the first deflection state or the second deflection state of the mirror assembly 2.

[0047] It should be understood that when the mirror assembly 2 is in the first deflection state or the second deflection state, it does not only mean that all the mirrors in the mirror assembly 2 are in a fixed deflection angle. In some possible embodiments, when the mirror assembly 2 is in the first deflection state or the second deflection state, it can also mean that the mirrors in the mirror assembly 2 remain in a specific deflection stroke.

[0048] Figure 1 The propagation path of the imaging light is schematically shown by a dashed line. When the mirror assembly 2 is in the first deflection state, the reference Figure 1The imaging light path is schematically shown by a middle arrow dashed line. The mirror of the mirror assembly 2 reflects the imaging light to the coupling-in region 11. After the imaging light irradiates the coupling-in region 11, the imaging light can be coupled into the optical waveguide 1 through the coupling-in grating. After the imaging light is coupled into the optical waveguide 1, the imaging light can propagate in the optical waveguide 1 by total internal reflection. The imaging light can be coupled out of the optical waveguide 1 through the coupling-out grating of the coupling-out region 12 and form an image in the user's eye, thereby realizing the near-eye display function of the display assembly.

[0049] With reference to the above description, the display assembly can be switched between the first deflection state and the second deflection state. Figure 1 When the mirror assembly 2 is in the second deflection state, the mirror of the mirror assembly 2 reflects the imaging light to the outside of the side edge of the optical waveguide 1. The imaging light can reach the imaging carrier 4 at a distance from the display assembly through the outside of the side edge of the optical waveguide 1, thereby projecting an image on the imaging carrier 4, thereby realizing the projection function of the display assembly.

[0050] It is worth noting that the trigger for switching the mirror assembly 2 between the first deflection state and the second deflection state and the process of controlling the switching can be completed by the relevant control components and execution components. In some possible embodiments, the relevant control components can apply an instruction for switching between the first deflection state and the second deflection state to the execution components according to the current display content or the user's instruction, and the execution components can be used to execute the instruction of the control components to drive the mirror to deflect, thereby completing the deflection state transition of the mirror assembly 2 between the first deflection state and the second deflection state.

[0051] In summary, when the mirror assembly 2 is in the first deflection state, the mirror assembly 2 reflects the imaging light to the coupling-in region 11, and the imaging light coupled into the optical waveguide 1 can realize the near-eye display function of the display assembly. When the mirror assembly 2 is in the second deflection state, the mirror assembly 2 reflects the imaging light to the outside of the side edge of the optical waveguide 1. When the imaging light reaches the imaging carrier 4 such as a wall, the imaging light can project an image on the imaging carrier 4. By providing the display assembly with switchable deflection states, the display assembly can realize both the near-eye display function and the projection function.

[0052] As an optional embodiment, with reference to the above description, Figure 1 In the specific arrangement of the mirror assembly 2, the mirror assembly 2 includes a first mirror 21 that can be deflected and adjusted, and the image source 3 is used to emit the imaging light to the first mirror 21. For the optical waveguide 1, the coupling-in region 11 is located on one side of the optical waveguide 1. In the specific arrangement of the first mirror 21 and the image source 3, the first mirror 21 and the image source 3 are located on the same side of the coupling-in region 11 of the optical waveguide 1, that is, the first mirror 21, the image source 3, and the coupling-in region 11 are located on the same side of the optical waveguide 1.

[0053] Figure 1The first mirror 21 is in the first deflection angle, as shown by 21a, Figure 1 The first mirror 21 is in the second deflection angle, as shown by 21b. When the mirror assembly 2 is in the first deflection state, the first mirror 21 is deflected to the first deflection angle, and the first mirror 21 is used to reflect the imaging light and make the imaging light incident to the coupling-in region 11. When the mirror assembly 2 is in the second deflection state, the first mirror 21 is deflected to the second deflection angle, and the first mirror 21 is used to reflect the imaging light and make the imaging light propagate from the side edge of the optical waveguide 1 to the side of the optical waveguide 1 away from the first mirror 21 and project the image. In this way, by adjusting the deflection angle of the first mirror 21, the projection function and the near-eye display function of the display assembly can be realized.

[0054] Optionally, the second deflection angle satisfies that when the first mirror 21 is in the second deflection angle, the side edge of the optical waveguide 1 does not block the imaging light.

[0055] In the specific setting of the first mirror 21, the first mirror 21 can adopt various driving modes such as motor driving, electromagnetic, piezoelectric, electrostatic, and electrothermal driving to realize the driving of the first mirror 21 to adjust the deflection between the first deflection angle and the second deflection angle.

[0056] It is worth noting that the first deflection angle and the second deflection angle here can be specific angles or a certain angle range. For example, in a specific embodiment, when the first mirror 21 is located between the first angle and the second angle, the imaging light can be projected to form an image, and when the first mirror 21 is located between the first angle and the second angle, the second deflection angle is reached.

[0057] By setting the first mirror 21 that can be deflected and adjusted, the projection function and the near-eye display function of the display assembly are realized, which has the characteristics of simple and stable structure, easy control and adjustment, etc.

[0058] Reference Figure 2 , Figure 2 This is the second schematic diagram of the display assembly in the embodiments of the present application. As an optional embodiment, in the specific setting of the first mirror 21, the first mirror 21 is configured to, when the mirror assembly 2 is in the first deflection state, reflect the imaging light and make the imaging light incident to the coupling-in region 11 at a set angle. Specifically, the deflection angle of the first mirror 21 can be calculated according to the position of the first mirror 21, the position of the image source 3, the angle of the emitted imaging light, the position of the coupling-in region 11, etc., and according to the principle of total reflection of light. The imaging light is incident to the coupling-in grating at a specific angle, which can reduce the generation of stray light. The specific angle can be obtained according to theoretical calculation or experiment, and in some embodiments, the specific angle can be 6 degrees, 8 degrees, 10 degrees, 12 degrees, etc.

[0059] By setting the first mirror 21, the imaging light can be reflected and made to be incident to the coupling-in region 11 at a set angle, i.e., to the coupling-in grating at a set angle. When the imaging light is incident to the coupling-in region 11 at a set angle, the generation of stray light can be reduced by the design of the set angle.

[0060] With reference to the foregoing description of the first embodiment of the display assembly, the second embodiment of the display assembly is described below. Figure 2 Optionally, when the mirror assembly 2 is specifically set, the mirror assembly 2 further comprises a second mirror 22 that can be adjusted by deflection. The second mirror 22 can also be driven by various driving modes such as electric motor driving, electromagnetic, piezoelectric, electrostatic, electrothermal driving, etc. to realize the deflection of the second mirror 22.

[0061] On the light path of the imaging light, the second mirror 22 is located downstream of the first mirror 21. That is, on the path of the imaging light, the second mirror 22 is located between the first mirror 21 and the imaging carrier 4 for projection imaging. When the mirror assembly 2 is in the second deflection state, the imaging light first passes through the reflection of the first mirror 21, then passes through the reflection of the second mirror 22, and finally reaches the imaging carrier 4 for projection imaging.

[0062] When the second mirror 22 is specifically set, the second mirror 22 is located outside the side edge of the optical waveguide 1, and the second mirror 22 is configured to reflect the imaging light reflected by the first mirror 21 and make the imaging light propagate to the side of the optical waveguide 1 away from the first mirror 21 in a direction parallel to the perpendicular incidence to the coupling-in region 11 when the mirror assembly 2 is in the second deflection state.

[0063] In this way, when the display assembly realizes the projection function, the imaging light can also be transmitted to the imaging carrier 4 in a direction parallel to the direction of perpendicular incidence to the coupling-in region 11 and imaged, so that the projection imaging distortion caused by the oblique incidence of the imaging light can be avoided to a certain extent.

[0064] With reference to the foregoing description of the first embodiment of the display assembly, the second embodiment of the display assembly is described below. Figure 3 , Figure 3 FIG. 3 is a schematic view of a display assembly according to an embodiment of the present application.

[0065] As an optional implementation, when the first mirror 21 is specifically set, the first mirror 21 can also be configured to reflect the imaging light and make the imaging light propagate to the side of the optical waveguide 1 away from the first mirror 21 in a direction parallel to the perpendicular incidence to the coupling-in region 11 when the mirror assembly 2 is in the second deflection state.

[0066] Specifically, when the mirror assembly 2 is in the first deflection state, the deflection angle of the first mirror 21 can be calculated according to the position of the first mirror 21, the position of the image source 3, the angle of the emitted imaging light, the projection angle of the imaging light, and the like, and according to the total reflection principle of light. As an example, when the first mirror 21 is in the second deflection state, the imaging light is incident to the first mirror 21 along a direction parallel to the plane of the coupling-in region 11, and the included angle between the first mirror 21 and the plane where the coupling-out region 12 is located is 45°, that is, the imaging light can be transmitted to the side of the optical waveguide 1 away from the first mirror 21 along a direction parallel to the direction of the perpendicular incidence to the coupling-in region 11.

[0067] In this way, when the display assembly implements the projection function, the imaging light can be transmitted to the imaging carrier 4 along a direction parallel to the direction of the perpendicular incidence to the coupling-in region 11 and imaged, so that the projection imaging distortion caused by the oblique incidence of the imaging light can be avoided to a certain extent.

[0068] Optionally, continuing to refer to Figure 3 In the specific setting of the mirror assembly 2, the mirror assembly 2 further includes a third mirror 23 that can be deflected and adjusted. The third mirror 23 can also adopt various driving modes such as motor driving, electromagnetic, piezoelectric, electrostatic, and electrothermal driving to realize the driving of the deflection of the third mirror 23.

[0069] On the light path of the imaging light, the third mirror 23 is arranged between the first mirror 21 and the coupling-in region 11; when the mirror assembly 2 is in the first deflection state, the imaging light first passes through the reflection of the first mirror 21, then passes through the reflection of the third mirror 23, and finally reaches the coupling-in region 11.

[0070] The third mirror 23 is configured to, when the mirror assembly 2 is in the first deflection state, reflect the imaging light and make the imaging light incident to the coupling-in region 11 at a set angle. Making the imaging light incident to the coupling-in grating at a specific angle can reduce the generation of stray light. The specific angle can be obtained according to theoretical calculation or experiment, and in some embodiments, the specific angle can be 6 degrees, 8 degrees, 10 degrees, 12 degrees, etc.

[0071] By setting the third mirror 23, the imaging light can be reflected and made to incident to the coupling-in region 11 at a set angle, that is, the imaging light can be made to incident to the coupling-in grating at a set angle, so that the generation of stray light can be reduced.

[0072] As Figure 1 , Figure 2 and Figure 3The imaging light rays incident to the first mirror 21 in the direction in which the coupling-in area 11 points to the coupling-out area 12 all come from the side of the first mirror 21 close to the coupling-out area 12 in the display assembly shown. In other possible embodiments, the imaging light rays incident to the first mirror 21 can also come from the side of the first mirror 21 away from the coupling-out area 12 or other directions. When the imaging light rays incident to the first mirror 21 come from the side of the first mirror 21 away from the coupling-out area 12 or other directions, the orientations and deflection angles of the first mirror 21, the second mirror 22 and the third mirror 23 can be adjusted according to actual conditions, or the display assembly can be made to have both near-eye display function and projection function.

[0073] As an optional embodiment, when the image source 3 is specifically configured, the image source 3 is a projection image source or a non-projection image source. When the image source 3 is a projection image source, the image source 3 can be an LBS (Laser Beam Scanning) light engine or a DLP (Digital Light Processing) light engine, etc. When the image source 3 is a non-projection image source, the image source 3 can be a Micro OLED (Silicon-based Organic Light-Emitting Diode) light engine or an LCoS (Liquid Crystal on Silicon) light engine, etc.

[0074] As an optional embodiment, when the image source 3 is a non-projection image source, the display assembly further includes a lens assembly. When the mirror assembly 2 is in the second deflection state, the lens assembly is located on the propagation path of the imaging light rays and downstream of the first mirror 21 or between the first mirror 21 and the image source 3. When the mirror assembly 2 is in the second deflection state, the imaging light rays pass through the lens assembly between the image source 3 and the first mirror 21, or the imaging light rays are reflected by the first mirror 21, then pass through the lens assembly and are projected and imaged again.

[0075] The lens assembly can be a convex lens, or a combination of multiple convex lenses or concave lenses and other functional lenses. The function of the lens assembly is to magnify the image field of the imaging light rays, so as to expand the imaging area of the non-projection image source when the image source 3 is a non-projection image source.

[0076] As an optional embodiment, the display assembly provided by the embodiment of the present application further includes a gyroscope and a control module. The gyroscope is used to detect the motion state of the image source 3 and / or the mirror assembly 2 when the mirror assembly 2 is in the second deflection state; and the control module is used to control the deflection of the mirrors in the mirror assembly 2 and / or the image source 3 according to the detection result of the gyroscope, so that the imaging light rays are projected and imaged at a specific position.

[0077] Specifically, when the mirror assembly 2 is in the second deflection state, that is, when the display assembly is performing the projection function, the gyroscope can be used to detect only the motion state of the image source 3, the gyroscope can be used to detect only the motion state of the mirror assembly 2, and the gyroscope can also be used to detect the motion state of the mirror assembly 2 and the image source 3 simultaneously. By detecting the motion state of the image source 3 and / or the mirror assembly 2, the motion state of the display assembly can be inferred.

[0078] When the user wears the near-eye display assembly, the near-eye display assembly can be shaken due to the shaking of the user or due to environmental factors, and such shaking can cause the projected image to shake. By setting the gyroscope and the control module, the position of the projected image can be kept stable when the display assembly is offset within a certain range, thereby improving the projection display effect of the display assembly.

[0079] Optionally, when the control module is specifically set, the control module can compensate for the offset of the display assembly by controlling the deflection angle of the image source 3, or by controlling the deflection angle of the mirror in the mirror assembly 2, or by controlling the deflection angle of the image source 3 and the deflection angle of the mirror in the mirror assembly 2 simultaneously.

[0080] The embodiments of the present application also provide a near-eye display device, which comprises a device body and a display assembly as described above arranged on the device body.

[0081] The display assembly of the near-eye display device described above, when the mirror assembly is in the first deflection state, the mirror assembly reflects the imaging light to the coupling-in area, and the imaging light is coupled into the optical waveguide to realize the near-eye display function of the display assembly; when the mirror assembly is in the second deflection state, the mirror assembly reflects the imaging light out of the side edge of the optical waveguide, and the imaging light can project an image on an imaging carrier such as a wall when reaching the imaging carrier; by setting the display assembly with switchable deflection states, the display assembly is realized to have both the near-eye display and the projection imaging functions.

[0082] One or more embodiments of the present specification are intended to cover all such alternatives, modifications and variations falling within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of one or more embodiments of the present specification shall be included in the protection scope of the present disclosure.

[0083] The above is merely specific implementation manners of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which shall be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A display assembly, characterized by The application relates to a light waveguide, comprising: a light waveguide, having a coupling-in region; a mirror assembly for reflecting light rays; an image source for emitting imaging light rays to the mirror assembly; the mirror assembly can be in a first deflection state and a second deflection state; when the mirror assembly is in the first deflection state, a mirror of the mirror assembly reflects the imaging light rays to the coupling-in region and into the light waveguide; when the mirror assembly is in the second deflection state, the mirror of the mirror assembly reflects the imaging light rays to the outside of a lateral edge of the light waveguide and projects an image.

2. The display assembly of claim 1, wherein, the mirror assembly comprises a first mirror that can be deflected and adjusted, and the image source is used for emitting the imaging light rays to the first mirror; the coupling-in region is located on one side of the light waveguide, and the first mirror and the image source are located on the side of the light waveguide where the coupling-in region is located, when the mirror assembly is in the first deflection state, the first mirror is deflected to a first deflection angle, and the first mirror is used for reflecting the imaging light rays and making the imaging light rays incident to the coupling-in region; when the mirror assembly is in the second deflection state, the first mirror is deflected to a second deflection angle, and the first mirror is used for reflecting the imaging light rays and making the imaging light rays propagate from the outside of the lateral edge of the light waveguide to the side of the light waveguide that is away from the first mirror and project an image.

3. The display assembly of claim 2, wherein, the first mirror is configured to: when the mirror assembly is in the first deflection state, the first mirror is used for reflecting the imaging light rays and making the imaging light rays incident to the coupling-in region at a set angle.

4. The display assembly of claim 3, wherein, the mirror assembly further comprises a second mirror that can be deflected and adjusted; on the light path of the imaging light rays, the second mirror is located downstream of the first mirror, and the second mirror is located outside the lateral edge of the light waveguide; the second mirror is configured to, when the mirror assembly is in the second deflection state, reflect the imaging light rays reflected by the first mirror and make the imaging light rays propagate to the side of the light waveguide that is away from the first mirror along a direction parallel to the perpendicular incidence to the coupling-in region.

5. The display assembly of claim 2, wherein, the first mirror is configured to: when the mirror assembly is in the second deflection state, the first mirror is used for reflecting the imaging light rays and making the imaging light rays propagate to the side of the light waveguide that is away from the first mirror along a direction parallel to the perpendicular incidence to the coupling-in region.

6. The display assembly of claim 5, wherein, the mirror assembly further comprises a third mirror that can be deflected and adjusted, and on the light path of the imaging light rays, the third mirror is arranged between the first mirror and the coupling-in region; the third mirror is configured to, when the mirror assembly is in the first deflection state, reflect the imaging light rays and make the imaging light rays incident to the coupling-in region at a set angle.

7. The display assembly of claim 2, wherein, the image source is a projection image source or a non-projection image source.

8. The display assembly of claim 7, wherein, When the image source is a non-projection image source, the display assembly further comprises a lens assembly, the lens assembly is located on the propagation path of the imaging light rays and downstream of the first mirror or between the first mirror and the image source when the mirror assembly is in the second deflection state; When the mirror assembly is in the second deflection state, the imaging light rays pass through the lens assembly between the image source and the first mirror, or the imaging light rays are projected again after being reflected by the first mirror.

9. The display assembly of any of claims 1-8, wherein, The display assembly further comprises a gyroscope and a control module; When the mirror assembly is in the second deflection state, the gyroscope is used to detect the motion state of the image source and / or the mirror assembly; The control module is used to control the deflection of the mirrors in the mirror assembly and / or the image source according to the detection result of the gyroscope, so that the imaging light rays are projected and imaged at a specific position.

10. A near-eye display device, comprising a device body and a display assembly as claimed in any one of claims 1 to 9 arranged in the device body.

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