CN216351551U

CN216351551U - AR glasses

Info

Publication number: CN216351551U
Application number: CN202122481212.4U
Authority: CN
Inventors: 孙志文; 张君杰
Original assignee: Shenzhen Leiniao Network Media Co ltd
Current assignee: Thunderbird Innovation Technology Ningbo Co ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2022-04-19
Anticipated expiration: 2031-10-14

Abstract

The embodiment of the application provides AR glasses. The utility model provides a AR glasses include display device, close look device, projection lens and waveguide component, wherein, display device includes a plurality of display screens, a plurality of display screens set up respectively around closing look device, it can form the image with the monochromatic light fuse that a plurality of display screens sent respectively together to close look device, the light that constitutes this image gets into user's eye after projection lens and waveguide component's transmission, the compact structure of this AR glasses, light in weight is lighter, can realize wearing for a long time, thereby make the user obtain better experience.

Description

AR glasses

Technical Field

The application relates to the field of display, in particular to AR glasses.

Background

AR glasses are a new type of glasses for Augmented Reality (Augmented Reality) applications, and most of AR glasses have diversified functions such as display, photographing, video call, processing of text information, electronic mail, game entertainment, and the like. The AR glasses can simultaneously display the virtual scene on the basis of displaying the real scene, and the user can even interact with the virtual scene, so that the AR glasses are a new form of a future intelligent hardware product.

However, most of the existing AR glasses are large in size and heavy in weight, so that not only the appearance is heavy, but also a user feels uncomfortable when wearing the AR glasses for a long time, and the user experience is poor.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an AR glasses, compact structure, weight is lighter, can realize wearing for a long time, and user experience is better.

The embodiment of the application provides an AR glasses, includes:

the display device comprises a plurality of display screens, and the display screens are respectively used for emitting various monochromatic lights;

the color combining device is used for combining monochromatic light emitted by the display screens to form an image;

the projection lens is arranged on the light emitting side of the color combination device;

and the waveguide element is arranged on one side of the projection lens, which is deviated from the color combination device.

In some embodiments, the display device includes a first display screen for emitting the first monochromatic light, a second display screen for emitting the second monochromatic light, and a third display screen for emitting the third monochromatic light.

In some embodiments, the color combining device comprises a first prism, a second prism, a third prism and a fourth prism, wherein the first prism, the second prism, the third prism and the fourth prism are all isosceles right-angle prisms;

the respective vertexes of the first prism, the second prism, the third prism and the fourth prism are connected together, the bottom surface of the first prism is a light-emitting surface of the color combination device, the bottom surface of the second prism is arranged towards the first display screen, the bottom surface of the third prism is arranged towards the second display screen, and the bottom surface of the fourth prism is arranged towards the third display screen;

a first optical film layer is arranged between the third prism and the second prism and used for reflecting the first monochromatic light emitted by the first display screen and transmitting the second monochromatic light emitted by the second display screen;

a second optical film layer is arranged between the second prism and the first prism and used for reflecting third monochromatic light emitted by the third display screen and transmitting the first monochromatic light emitted by the first display screen and the second monochromatic light emitted by the second display screen;

a third optical film layer is arranged between the first prism and the fourth prism and used for reflecting the first monochromatic light emitted by the first display screen and transmitting the second monochromatic light emitted by the second display screen and the third monochromatic light emitted by the third display screen;

the fourth prism with be equipped with the fourth optics rete between the third prism, the fourth optics rete is used for reflecting third monochromatic light and transmission that the third display screen sent the second monochromatic light that the second display screen sent.

In some embodiments, the reflectivity of the first optical film layer to the first monochromatic light is greater than the transmissivity of the first optical film layer to the first monochromatic light, and the transmissivity of the first optical film layer to the second monochromatic light is greater than the reflectivity of the first optical film layer to the second monochromatic light;

the reflectivity of the second optical film layer to the third monochromatic light is greater than the transmissivity of the second optical film layer to the third monochromatic light, the transmissivity of the second optical film layer to the first monochromatic light is greater than the reflectivity of the second optical film layer to the first monochromatic light, and the transmissivity of the second optical film layer to the second monochromatic light is greater than the reflectivity of the second optical film layer to the second monochromatic light;

the reflectivity of the third optical film layer to the first monochromatic light is greater than the transmissivity of the third optical film layer to the first monochromatic light, the transmissivity of the third optical film layer to the second monochromatic light is greater than the reflectivity of the third optical film layer to the second monochromatic light, and the transmissivity of the third optical film layer to the third monochromatic light is greater than the reflectivity of the third optical film layer to the third monochromatic light;

the reflectivity of the fourth optical film layer to the third monochromatic light is greater than the transmissivity of the fourth optical film layer to the third monochromatic light, and the transmissivity of the fourth optical film layer to the second monochromatic light is greater than the reflectivity of the fourth optical film layer to the second monochromatic light.

In some embodiments, the bottom surface of the second prism is provided with a first antireflection film for increasing the transmittance of the first monochromatic light;

a second antireflection film is arranged on the bottom surface of the third prism and used for increasing the transmittance of the second monochromatic light;

a third antireflection film is arranged on the bottom surface of the fourth prism and used for increasing the transmittance of the third monochromatic light;

the bottom surface of first prism is equipped with the fourth antireflection coating, the fourth antireflection coating is used for increasing simultaneously first monochromatic light, second monochromatic light and the transmissivity of third monochromatic light.

In some embodiments, the color combining device comprises a first plane mirror, a second plane mirror, a third plane mirror and a fourth plane mirror, wherein one end of the first plane mirror, one end of the second plane mirror, one end of the third plane mirror and one end of the fourth plane mirror are connected together;

one side of the first plane mirror and one side of the second plane mirror are arranged towards the first display screen, one side of the second plane mirror departing from the first plane mirror and one side of the third plane mirror are arranged towards the second display screen, one side of the third plane mirror departing from the second plane mirror and one side of the fourth plane mirror are arranged towards the third display screen, one side of the first plane mirror departing from the second plane mirror is a light emergent side, and one side of the fourth plane mirror departing from the third plane mirror is a light emergent side;

the second plane mirror comprises a first light-transmitting plate and a first optical film arranged on the surface of the first light-transmitting plate, and the first optical film is used for reflecting first monochromatic light emitted by the first display screen and transmitting second monochromatic light emitted by the second display screen;

the first plane mirror comprises a second light-transmitting plate and a second optical film arranged on the surface of the second light-transmitting plate, and the second optical film is used for reflecting third monochromatic light emitted by the third display screen and transmitting the first monochromatic light emitted by the first display screen and the second monochromatic light emitted by the second display screen;

the fourth plane mirror comprises a third light-transmitting plate and a third optical film arranged on the surface of the third light-transmitting plate, and the third optical film is used for reflecting the first monochromatic light emitted by the first display screen and transmitting the second monochromatic light emitted by the second display screen and the third monochromatic light emitted by the third display screen;

the third plane mirror comprises a fourth light-transmitting plate and a fourth optical film arranged on the surface of the fourth light-transmitting plate, and the fourth optical film is used for reflecting third monochromatic light emitted by the third display screen and transmitting the second monochromatic light emitted by the second display screen.

In some embodiments, the reflectivity of the first optical thin film to the first monochromatic light is greater than the transmissivity of the first optical thin film to the first monochromatic light, and the transmissivity of the first optical thin film to the second monochromatic light is greater than the reflectivity of the first optical thin film to the second monochromatic light;

the reflectivity of the second optical film to the third monochromatic light is greater than the transmissivity of the second optical film to the third monochromatic light, the transmissivity of the second optical film to the first monochromatic light is greater than the reflectivity of the second optical film to the first monochromatic light, and the transmissivity of the second optical film to the second monochromatic light is greater than the reflectivity of the second optical film to the second monochromatic light;

the reflectivity of the third optical film to the first monochromatic light is greater than the transmissivity of the third optical film to the first monochromatic light, the transmissivity of the third optical film to the second monochromatic light is greater than the reflectivity of the third optical film to the second monochromatic light, and the transmissivity of the third optical film to the third monochromatic light is greater than the reflectivity of the third optical film to the third monochromatic light;

the reflectivity of the fourth optical film to the third monochromatic light is greater than the transmissivity of the fourth optical film to the third monochromatic light, and the transmissivity of the fourth optical film to the second monochromatic light is greater than the reflectivity of the fourth optical film to the second monochromatic light.

In some embodiments, the waveguide element includes a coupling-in region, a transition region and a coupling-out region, the coupling-in region is configured to receive light transmitted from the projection lens, the transition region is configured to connect the coupling-in region and the coupling-out region, and light emitted from the color combiner passes through the coupling-in region, the transition region and the coupling-out region in sequence after entering the waveguide element, and is transmitted to the eyes of a user after passing through the coupling-out region.

In some embodiments, the coupling-in region of the waveguide element is provided with a coupling-in grating, and the coupling-in grating is disposed on a side of the waveguide element facing the projection lens, or the coupling-in grating is disposed on a side of the waveguide element facing away from the projection lens.

In some embodiments, the center of the second display screen, the symmetry axis of the color combining device, the symmetry axis of the projection lens, and the center of the incoupling grating are located on the same line.

The utility model provides a AR glasses include display device, close look device, projection lens and waveguide component, wherein, display device includes a plurality of display screens, a plurality of display screens set up respectively around closing look device, it can form the image with the monochromatic light fuse that a plurality of display screens sent respectively together to close look device, the light that constitutes this image gets into user's eye after projection lens and waveguide component's transmission, the compact structure of this AR glasses, light in weight is lighter, can realize wearing for a long time, thereby make the user obtain better experience.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a first structural schematic diagram of AR glasses according to an embodiment of the present disclosure.

Fig. 2 is a first structural schematic diagram of a color combining device according to an embodiment of the present application.

Fig. 3 is a second structural schematic diagram of the color combining device according to the embodiment of the present application.

Fig. 4 is a third schematic structural diagram of a color combining device according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a waveguide element according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a second type of AR glasses according to an embodiment of the present application.

Fig. 7 is a schematic structural diagram of third AR glasses according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, fig. 1 is a first structural schematic diagram of AR glasses according to an embodiment of the present disclosure. The embodiment of the application provides an AR glasses 100, which includes a display device, a color combination device 20, a projection lens 50 and a waveguide element 60, wherein the display device includes a plurality of display screens, the plurality of display screens are respectively used for emitting a plurality of different monochromatic lights, the plurality of display screens are respectively arranged around the color combination device 20, and the color combination device 20 is used for fusing the monochromatic lights emitted by the plurality of display screens together to form an image; the projection lens 50 is disposed on the light-emitting side of the color combining device 20, and the waveguide element 60 is disposed on the side of the projection lens 50 away from the color combining device 20.

It should be noted that the AR glasses 100 provided in the embodiment of the present application may include a lens portion, a frame portion, and a temple portion (not shown in fig. 1) in addition to the display device, the color combining device 20, the projection lens 50, and the waveguide element 60. Wherein the lens portion is mounted to the frame portion and the frame portion is connected to the temple portion. The lens portion may contain one or more lenses. For example, the lens portion may be a complete lens, or may be two lenses corresponding to both eyes, respectively. The frame portion can include a nose piece. The frame portion and temple portion collectively enable AR glasses 100 to be stabilized on the eyes of a user. The waveguide element 60 may be provided at the lens portion, and the display device, the color combining device 20, and the projection lens 50 may be provided at the temple position or at the frame position.

Illustratively, the AR glasses 100 may include two lenses, a nose bracket disposed between and connecting the two lenses, two temples disposed at sides of the two lenses away from the nose bracket, respectively, the waveguide element 60 may be disposed at positions of the lenses, and the display device, the color combining device 20, and the projection lens 50 may be disposed at positions of the temples or at positions of the nose bracket.

Referring to fig. 1, the display device may include a first display screen 11, a second display screen 12 and a third display screen 13, where the first display screen 11 is used for emitting a first monochromatic light, the second display screen 12 is used for emitting a second monochromatic light, and the third display screen 13 is used for emitting a third monochromatic light.

Illustratively, the first display screen 11, the second display screen 12 and the third display screen 13 are Micro LED display screens.

Illustratively, the first, second and third monochromic light may be any permutation and combination of red, green and blue light, that is, when one of the first, second and third monochromic light is red light, the other two lights are green and blue light, respectively.

Referring to fig. 2, fig. 2 is a first structural schematic diagram of a color combining device according to an embodiment of the present disclosure. The color combination device 20 may include a first prism 21, a second prism 22, a third prism 23, and a fourth prism 24, where the first prism 21, the second prism 22, the third prism 23, and the fourth prism 24 are all isosceles right-angle prisms;

the respective vertexes of the first prism 21, the second prism 22, the third prism 23 and the fourth prism 24 are connected together, the bottom surface of the first prism 21 is a light-emitting surface of the color combination device 20, the bottom surface of the second prism 22 is arranged facing the first display screen 11, the bottom surface of the third prism 23 is arranged facing the second display screen 12, and the bottom surface of the fourth prism 24 is arranged facing the third display screen 13;

a first optical film 31 is arranged between the third prism 23 and the second prism 22, and the first optical film 31 is used for reflecting the first monochromatic light emitted by the first display screen 11 and transmitting the second monochromatic light emitted by the second display screen 12;

a second optical film 32 is arranged between the second prism 22 and the first prism 21, and the second optical film 32 is used for reflecting the third monochromatic light emitted by the third display screen 13 and transmitting the first monochromatic light emitted by the first display screen 11 and the second monochromatic light emitted by the second display screen 12;

a third optical film 33 is arranged between the first prism 21 and the fourth prism 24, and the third optical film 33 is used for reflecting the first monochromatic light emitted by the first display screen 11 and transmitting the second monochromatic light emitted by the second display screen 12 and the third monochromatic light emitted by the third display screen 13;

a fourth optical film 34 is disposed between the fourth prism 24 and the third prism 23, and the fourth optical film 34 is used for reflecting the third monochromatic light emitted by the third display screen 13 and transmitting the second monochromatic light emitted by the second display screen 12.

The respective vertexes of the first prism 21, the second prism 22, the third prism 23, and the fourth prism 24 refer to the vertexes of right angles in the isosceles right triangle of the cross section of the first prism 21, the second prism 22, the third prism 23, and the fourth prism 24, respectively, and the bottom surface of the first prism 21, the bottom surface of the second prism 22, the bottom surface of the third prism 23, and the bottom surface of the fourth prism 24 refer to the bases of the isosceles right triangles of the cross section of the first prism 21, the second prism 22, the third prism 23, and the fourth prism 24, respectively.

Illustratively, the first prism 21, the second prism 22, the third prism 23, and the fourth prism 24 are four identical isosceles right-angle prisms.

Illustratively, the reflectivity of the first optical film 31 to the first monochromatic light is greater than the transmissivity of the first optical film 31 to the first monochromatic light, and the transmissivity of the first optical film 31 to the second monochromatic light is greater than the reflectivity of the first optical film 31 to the second monochromatic light;

the reflectivity of the second optical film 32 to the third monochromatic light is greater than the transmissivity of the second optical film 32 to the third monochromatic light, the transmissivity of the second optical film 32 to the first monochromatic light is greater than the reflectivity of the second optical film 32 to the first monochromatic light, and the transmissivity of the second optical film 32 to the second monochromatic light is greater than the reflectivity of the second optical film 32 to the second monochromatic light;

the reflectivity of the third optical film 33 to the first monochromatic light is greater than the transmissivity of the third optical film 33 to the first monochromatic light, the transmissivity of the third optical film 33 to the second monochromatic light is greater than the reflectivity of the third optical film 33 to the second monochromatic light, and the transmissivity of the third optical film 33 to the third monochromatic light is greater than the reflectivity of the third optical film 33 to the third monochromatic light;

the reflectivity of the fourth optical film 34 to the third monochromatic light is greater than the transmissivity of the fourth optical film 34 to the third monochromatic light, and the transmissivity of the fourth optical film 34 to the second monochromatic light is greater than the reflectivity of the fourth optical film 34 to the second monochromatic light.

Referring to fig. 3, fig. 3 is a second structural schematic diagram of a color combining device according to an embodiment of the present disclosure. A first antireflection film 41 may be disposed on the bottom surface of the second prism 22, and the first antireflection film 41 is used to increase the transmittance of the first monochromatic light;

the bottom surface of the third prism 23 may be provided with a second antireflection film 42, and the second antireflection film 42 is used to increase the transmittance of the second monochromatic light;

a third antireflection film 43 may be disposed on the bottom surface of the fourth prism 24, and the third antireflection film 43 is used to increase the transmittance of the third monochromatic light;

a fourth antireflection film 44 may be disposed on a bottom surface of the first prism 21, and the fourth antireflection film 44 is used to increase the transmittance of the first, second, and third monochromatic lights simultaneously.

It is understood that the first, second, third, and fourth

antireflection films

41, 42, 43, and 44 each function to reduce reflected light from the prism surface, thereby increasing the amount of light transmitted through the prism.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a color combining device according to an embodiment of the present application. The color combiner 20 may include a first plane mirror 210, a second plane mirror 220, a third plane mirror 230, and a fourth plane mirror 240, wherein one end of the first plane mirror 210, one end of the second plane mirror 220, one end of the third plane mirror 230, and one end of the fourth plane mirror 240 are connected together;

one side of the first flat mirror 210 and one side of the second flat mirror 220 are arranged towards the first display screen 11, one side of the second flat mirror 220 departing from the first flat mirror 210 and one side of the third flat mirror 230 are arranged towards the second display screen 12, one side of the third flat mirror 230 departing from the second flat mirror 220 and one side of the fourth flat mirror 240 are arranged towards the third display screen 13, one side of the first flat mirror 210 departing from the second flat mirror 220 is a light-emitting side, and one side of the fourth flat mirror 240 departing from the third flat mirror 230 is a light-emitting side;

the second flat mirror 220 includes a first transparent plate 201 and a first optical film 301 disposed on a surface of the first transparent plate 201, where the first optical film 301 is used for reflecting the first monochromatic light emitted from the first display screen 11 and transmitting the second monochromatic light emitted from the second display screen 12;

the first plane mirror 210 includes a second transparent plate 202 and a second optical film 302 disposed on a surface of the second transparent plate 202, the second optical film 302 is configured to reflect a third monochromatic light emitted by the third display screen 13 and transmit the first monochromatic light emitted by the first display screen 11 and the second monochromatic light emitted by the second display screen 12;

the fourth plane mirror 240 includes a third transparent plate 203 and a third optical film 303 disposed on a surface of the third transparent plate 203, where the third optical film 303 is configured to reflect the first monochromatic light emitted from the first display screen 11 and transmit the second monochromatic light emitted from the second display screen 12 and the third monochromatic light emitted from the third display screen 13;

the third flat mirror 230 includes a fourth transparent plate 204 and a fourth optical film 304 disposed on a surface of the fourth transparent plate 204, wherein the fourth optical film 304 is used for reflecting the third monochromatic light emitted from the third display 13 and transmitting the second monochromatic light emitted from the second display 12.

It should be noted that the first optical film 301 may be disposed on a side of the first transparent plate 201 facing the first flat mirror 210, or may be disposed on a side of the first transparent plate 201 facing the third flat mirror 230;

the second optical film 302 may be disposed on a side of the second transparent plate 202 facing the second flat mirror 220, or may be disposed on a side of the second transparent plate 202 facing the fourth flat mirror 240;

the third optical film 303 may be disposed on a side of the third transparent plate 203 facing the first flat mirror 210, or may be disposed on a side of the third transparent plate 203 facing the third flat mirror 230;

the fourth optical film 304 may be disposed on a side of the fourth transparent plate 204 facing the fourth flat mirror 240, or may be disposed on a side of the fourth transparent plate 204 facing the second flat mirror 220.

For example, the first transparent plate 201, the second transparent plate 202, the third transparent plate 203, and the fourth transparent plate 204 may be made of glass or resin.

Referring to fig. 4, the first flat mirror 210 and the third flat mirror 230 may be located on a straight line, and the second flat mirror 220 and the fourth flat mirror 240 may be located on another straight line, which are perpendicular to each other. That is, any two adjacent flat mirrors among the first flat mirror 210, the second flat mirror 220, the third flat mirror 230, and the fourth flat mirror 240 are perpendicular to each other.

Illustratively, the reflectivity of the first optical thin film 301 for the first monochromatic light is greater than the transmissivity of the first optical thin film 301 for the first monochromatic light, and the transmissivity of the first optical thin film 301 for the second monochromatic light is greater than the reflectivity of the first optical thin film 301 for the second monochromatic light;

the reflectivity of the second optical film 302 to the third monochromatic light is greater than the transmissivity of the second optical film 302 to the third monochromatic light, the transmissivity of the second optical film 302 to the first monochromatic light is greater than the reflectivity of the second optical film 302 to the first monochromatic light, and the transmissivity of the second optical film 302 to the second monochromatic light is greater than the reflectivity of the second optical film 302 to the second monochromatic light;

the reflectivity of the third optical thin film 303 to the first monochromatic light is greater than the transmissivity of the third optical thin film 303 to the first monochromatic light, the transmissivity of the third optical thin film 303 to the second monochromatic light is greater than the reflectivity of the third optical thin film 303 to the second monochromatic light, and the transmissivity of the third optical thin film 303 to the third monochromatic light is greater than the reflectivity of the third optical thin film 303 to the third monochromatic light;

the reflectivity of the fourth optical thin film 304 to the third monochromatic light is greater than the transmissivity of the fourth optical thin film 304 to the third monochromatic light, and the transmissivity of the fourth optical thin film 304 to the second monochromatic light is greater than the reflectivity of the fourth optical thin film 304 to the second monochromatic light.

In the present embodiment, the waveguide element 60 may be a diffractive optical waveguide (e.g., a holographic diffractive waveguide) or an array optical waveguide.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a waveguide device according to an embodiment of the present disclosure. When the waveguide element 60 is a diffractive optical waveguide, the waveguide element 60 may include a coupling-in region 61, a transition region 62 and a coupling-out region 63, the coupling-in region 61 is used for receiving the light transmitted from the projection lens 50, the transition region 62 is used for connecting the coupling-in region 61 and the coupling-out region 63, and the light emitted from the color combiner 20 enters the waveguide element 60, passes through the coupling-in region 61, the transition region 62 and the coupling-out region 63 in sequence, and is transmitted to the eyes of the user after passing through the coupling-out region 63.

When the waveguide element 60 is a diffractive optical waveguide, the operating principle of the waveguide element 60 may be: the light emitted from the projection lens 50 is diffracted for the first time after entering the coupling-in region 61, the diffracted light propagates in the waveguide element 60 in a total reflection manner, the diffracted light is diffracted for the second time after reaching the switching region 62, the diffracted light propagates in the waveguide element 60 in a total reflection manner, the diffracted light propagates in the coupling-out region 63 and is diffracted for the third time, and the diffracted light is transmitted into the eyes of the user.

Illustratively, the waveguide member 60 may include a glass plate or a resin plate.

Referring to fig. 6 and 7, fig. 6 is a second structural schematic diagram of the AR glasses provided in the embodiment of the present application, and fig. 7 is a third structural schematic diagram of the AR glasses provided in the embodiment of the present application. The incoupling region 61 of the waveguide 60 may be provided with an incoupling grating 64, which incoupling grating 64 may be provided on the side of the waveguide 60 facing the projection lens 50 (as shown in fig. 6) or on the side of the waveguide 60 facing away from the projection lens 50 (as shown in fig. 7).

When the incoupling grating 64 is disposed on the side of the waveguide element 60 facing the projection lens 50, the incoupling grating 64 may be a transmission grating, and the transmission grating may diffract light and let the diffracted light pass through the transmission grating, that is, the light emitted from the projection lens 50 enters the incoupling grating 64 and is diffracted, and the diffracted light passes through the incoupling grating 64 and propagates inside the waveguide element 60;

when the incoupling grating 64 is disposed on a side of the waveguide element 60 away from the projection lens 50, the incoupling grating 64 may be a reflection grating, and the reflection grating may diffract the light and reflect the diffracted light to a side where the incident light is located, that is, the light emitted from the projection lens 50 enters the incoupling grating 64 after passing through the waveguide element 60, and is diffracted in the incoupling grating 64, and the diffracted light is reflected by the incoupling grating 64 to the inside of the waveguide element 60 for propagation.

Referring to fig. 6 and 7, the center of the second display 12, the symmetry axis of the color combiner 20, the symmetry axis of the projection lens 50, and the center of the coupling grating 64 are located on the same straight line.

In the embodiment of the present application, the projection lens 50 can perform the functions of imaging the image synthesized by the color combiner 20 and magnifying the image.

Illustratively, the projection lens 50 may include a plurality of lenses 51, the number of the plurality of lenses 51 may be 2 to 10, and the plurality of lenses 51 are sequentially arranged in a direction from the color combiner 20 to the waveguide 60. In some embodiments, the number of multi-piece lenses 51 may be 2, 3, 4, 5, 6, 7, 8, 9, or 10. The multi-piece lenses 51 may be selected from one or more of a biconcave lens, a plano-concave lens, a convex-concave lens, a biconvex lens, and a plano-convex lens.

Illustratively, the material of the lens 51 may be resin or glass.

Referring to fig. 1, the waveguide element 60 and the projection lens 50 may be in a perpendicular relationship or a non-perpendicular relationship, and an included angle between a plane of the waveguide element 60 and an extending direction of the projection lens 50 may be 75 ° to 105 °, for example, 75 °, 80 °, 85 °, 90 °, 95 °, 100 °, 105 °, and the like. The extending direction of the projection lens 50 refers to the arrangement direction of the plurality of lenses 51 in the projection lens 50, i.e., the direction from the color combiner 20 to the waveguide 60.

In the embodiment of the present application, when the reflectivity of a certain optical film layer or optical film to a certain monochromatic light is greater than the transmittance, the reflectivity of the optical film layer or optical film to the monochromatic light may be 60% to 100%, for example, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 100%, etc., and the transmittance of the optical film layer or optical film to the monochromatic light may be 0 to 40%, for example, 0, 15%, 20%, 25%, 30%, 35%, 40%, etc. When the transmittance of a certain optical film layer or optical thin film for a certain monochromatic light is greater than the reflectance, the transmittance of the optical film layer or optical thin film for the monochromatic light may be 60% to 100%, for example, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 100%, etc., and the reflectance of the optical film layer or optical thin film for the monochromatic light may be 0 to 40%, for example, 0, 15%, 20%, 25%, 30%, 35%, 40%, etc.

As described above with reference to fig. 1 to fig. 5, the working principle of the AR glasses 100 according to the embodiment of the present application is: the light emitted from the first display panel 11, the second display panel 12 and the third display panel 13 is transmitted to the color combiner 20, wherein the light emitted from the first display screen 11 and the third display screen 13 is reflected to the projection lens 50, and the light of the second display 12 will be transmitted to the projection lens 50 through the color combiner 20, and finally the light of the first display 11, the second display 12 and the third display 13 will be merged and transmitted through the projection lens 50, enters the waveguide element 60 through the coupling-in region 61 of the waveguide element 60 and propagates towards the transition region 62 of the waveguide element 60, reaching the transition region 62, the propagation direction changes, propagates to the coupling-out region 63, and after reaching the coupling-out region 63, the propagation direction changes again, and finally exits from the waveguide element 60, and finally enters the human eye, and is imaged on the retina of the human eye, so that the human can see an enlarged virtual image.

The AR glasses 100 that this application embodiment provided can adopt small-size display screen, and then closes look device 20 and projection lens 50 and all set up to less size, realizes the display module of compact structure, small volume, and the optical waveguide technique of deuterogamying can realize being close to AR glasses 100 of myopia glasses form, and this AR glasses 100 has outstanding advantages such as light, low-power consumption, outdoor use.

The AR glasses provided in the embodiments of the present application are described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. AR eyewear, comprising:

2. The AR glasses according to claim 1, wherein the display device comprises a first display screen for emitting the first monochromatic light, a second display screen for emitting the second monochromatic light, and a third display screen for emitting the third monochromatic light.

3. The AR glasses according to claim 2, wherein the color combining means comprises a first prism, a second prism, a third prism, and a fourth prism, the first prism, the second prism, the third prism, and the fourth prism all being isosceles right prisms;

4. The AR glasses according to claim 3, wherein a reflectivity of the first optical film to the first monochromatic light is greater than a transmissivity of the first optical film to the first monochromatic light, and a transmissivity of the first optical film to the second monochromatic light is greater than a reflectivity of the first optical film to the second monochromatic light;

5. The AR glasses according to claim 3, wherein a first antireflection film is disposed on a bottom surface of the second prism, and the first antireflection film is configured to increase a transmittance of the first monochromatic light;

6. The AR glasses according to claim 2, wherein the color combining means includes a first plane mirror, a second plane mirror, a third plane mirror, and a fourth plane mirror, and one end of the first plane mirror, one end of the second plane mirror, one end of the third plane mirror, and one end of the fourth plane mirror are connected together;

7. The AR glasses according to claim 6, wherein the first optical film has a reflectivity for the first monochromatic light that is greater than a transmittance of the first optical film for the first monochromatic light, and the first optical film has a transmittance for the second monochromatic light that is greater than a reflectivity of the first optical film for the second monochromatic light;

8. The AR glasses according to claim 2, wherein the waveguide comprises an in-coupling region, an adapting region and an out-coupling region, the in-coupling region is configured to receive the light transmitted from the projection lens, the adapting region is configured to connect the in-coupling region and the out-coupling region, the light emitted from the color combiner passes through the in-coupling region, the adapting region and the out-coupling region in sequence after entering the waveguide, and is transmitted to the eyes of the user after passing through the out-coupling region.

9. The AR glasses according to claim 8, wherein the coupling-in region of the waveguide is provided with a coupling-in grating, the coupling-in grating is disposed on a side of the waveguide facing the projection lens, or the coupling-in grating is disposed on a side of the waveguide facing away from the projection lens.

10. The AR glasses according to claim 9, wherein a center of the second display screen, a symmetry axis of the color combiner, a symmetry axis of the projection lens, and a center of the incoupling grating are located on a same line.