CN218824977U - AR glasses subassembly and AR glasses - Google Patents

Abstract

The application provides AR glasses subassembly and AR glasses. Wherein the AR glasses subassembly includes: an optical machine, a folding prism group and a waveguide lens. The refraction and rotation prism group is arranged on a light-emitting path of the optical machine and comprises an incident surface, an emergent surface and odd reflecting surfaces. The waveguide lens is attached to the emergent surface of the folding prism group. Wherein the included angle between the incident surface and the emergent surface is between 1 degree and 30 degrees. Through setting up the turning prism group for the image light that the ray apparatus sent is in the image that forms on the emergent surface is in image light that forms is in image rotation 90 on the incident surface, simultaneously with the incident surface of turning prism group with the contained angle between the emergent surface is the acute angle, makes this AR glasses subassembly when using the long edge direction of picture that people's eye seen through the optical waveguide can accord with the long edge direction of expecting the picture, and all can have an contained angle between the mirror leg of the glasses of daily use and the lens usually, and is more comfortable when letting the wearer use.

Description

AR glasses subassembly and AR glasses

Technical Field

The application relates to the technical field of virtual reality display equipment, in particular to an AR glasses assembly and AR glasses.

Background

With the progress of imaging technology, people have higher and higher demands on immersive experience, and in recent years, the development of Virtual Reality (VR)/Augmented Reality (AR) technology gradually meets the pursuit of people on visual experience. The head-mounted device can liberate both hands of people, reduce the dependence on the screen, and build better visual effect simultaneously. For head-mounted devices, near-eye display is the key to its technology, and imaging quality and thinness are major considerations. The near-to-eye display system generally consists of an image far-near light transmission system, and image pictures sent by an image source are transmitted to human eyes through an optical transmission system. Here, unlike the blocking of the external environment by the VR, the AR needs to have a certain transmittance so that the wearer can see the external environment while seeing the image.

For optical transmission systems, there are many schemes in the industry, such as free space optics, free form optics, and display waveguides. The optical waveguide technology is obviously superior to other optical schemes due to the characteristics of a large eye box (eyebox) and the light and thin characteristics thereof, and becomes a current main flow path.

In a near-eye display system using an optical waveguide, the long-side direction of a projection screen of a projector engine often does not coincide with the long-side direction of an expected screen due to factors such as the package and the structural appearance of a spatial light modulator, and in this case, the long-side direction of the screen viewed by human eyes through the optical waveguide does not coincide with the long-side direction of the expected screen. In addition, an included angle is usually formed between each temple of the glasses used in daily life and each lens, and the included angle can be more comfortable when a wearer uses the glasses. It is difficult to provide a spectacle-type optical waveguide near-eye display system with the above features.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an AR glasses assembly and AR glasses, and aims to solve the technical problems.

The embodiments of the present application achieve the above object by the following means.

In a first aspect, the present application provides an AR eyeglass assembly, which may include: an optical machine, a folding prism group and a waveguide lens. The optical machine is used for emitting image light. The refraction and rotation prism group is arranged on a light-emitting path of the light machine, the refraction and rotation prism group can comprise an incident surface, an emergent surface and an odd number of reflecting surfaces, and image light emitted by the light machine sequentially passes through the incident surface, the odd number of reflecting surfaces and the emergent surface, so that the image light formed on the emergent surface is opposite to the image light formed on the incident surface and rotates by 90 degrees. The waveguide lens is attached to the emergent surface of the folding prism group, and is used for transmitting the image light to human eyes and transmitting ambient light. Wherein an included angle between the incident surface and the exit surface is between 1 ° and 30 °.

In one embodiment, the angle between the entrance face and the exit face is between 5 ° and 20 °.

In one embodiment, the folding prism group may include a first prism, a second prism and a third prism which are sequentially attached to each other, and the first prism, the second prism and the third prism are all provided with a reflecting surface.

In one embodiment, the first prism is a triangular prism, the second prism is a triangular prism, the third prism is a pentagonal prism, the first prism may include the incident surface, and the third prism may include the exit surface.

In one embodiment, the first prism may include: the light source comprises a first incident surface, a first emergent surface and a first reflecting surface connected between the first incident surface and the first emergent surface. The second prism may include: the light source comprises a second incident surface, a second emergent surface and a second reflecting surface connected between the second incident surface and the second emergent surface. The third prism may include: the light source comprises a third incident surface, a third emergent surface and a third reflecting surface connected between the third incident surface and the third emergent surface. The first emergent surface is attached to the second incident surface, the second emergent surface is attached to the third incident surface, and the third emergent surface is attached to the waveguide lens.

In one embodiment, the first, second and third reflective surfaces are total reflective surfaces.

In one embodiment, the third prism further comprises: the first transition surface is arranged between the third incident surface and the third reflecting surface, the second transition surface is arranged between the third reflecting surface and the third emergent surface, and in the bottom surface projection of the third prism, the included angle between the third emergent surface and the third reflecting surface is theta ₂ The complementary angle of the included angle between the third emergent surface and the third incident surface is theta ₁ Theta of ₁ And theta ₂ The following relationship is satisfied: 2 x theta ₂ + θ ₁ ＝90°。

In one embodiment, the folding prism group is an integrally formed structure.

In a second aspect, the present application provides AR glasses, which may include an AR glasses assembly as described above, and a frame, which may include: picture frame and mirror leg, the mirror leg with the picture frame is connected, the ray apparatus is arranged in the mirror leg, the prism group of turning over with the picture frame is connected, the waveguide lens set up in the picture frame.

In one embodiment, the optical machine is a cylindrical optical machine, and the extending direction of the optical machine coincides with the extending direction of the glasses legs.

The utility model provides a AR glasses subassembly and AR glasses through setting up turning prism group for the image light that the ray apparatus sent is in the image that forms on the emergent face is relative image light is in the image rotation 90 that forms on the incident face, simultaneously with the incident face of turning prism group with contained angle between the emergent face is the acute angle, makes this AR glasses subassembly when using the long edge direction of picture that people's eye seen through the optical waveguide can accord with the long edge direction of expecting the picture, and all can have an contained angle usually between the mirror leg of the glasses of daily use and the lens, and this contained angle can let when the person of wearing uses more comfortable. The problem of among the prior art in the near-eye display system that uses the optical waveguide, factors such as the encapsulation and the structural appearance that are limited to the space light debugger lead to being difficult to have above-mentioned two kinds of characteristics concurrently is solved.

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, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings may be obtained according to these drawings without creative efforts.

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

Fig. 2 is an exploded view of a folding prism group according to an embodiment of the present disclosure.

Fig. 3 is a schematic structural diagram of a folding prism group according to an embodiment of the present disclosure.

Fig. 4 is a schematic view of a prism set according to an embodiment of the present disclosure.

Fig. 5 is a top view of a prism assembly according to an embodiment of the present disclosure.

Fig. 6 is a top view of a third prism according to an embodiment of the present disclosure.

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

Reference numerals: the AR glasses 1, the AR glasses assembly 10, the optical engine 100, the turning prism group 200, the first prism 210, the first incident surface 211, the first emergent surface 212, the first reflecting surface 213, the second prism 220, the second incident surface 221, the second emergent surface 222, the second reflecting surface 223, the third prism 230, the third incident surface 231, the third emergent surface 232, the third reflecting surface 233, the first transition surface 234, the second transition surface 235, the waveguide lens 300, the frame 20, the frame 21, and the temple 22.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In order to make the technical solutions better understood by those skilled in the art, 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, the present application provides an AR eyeglass assembly 10, which may include: an optical bench 100, a prism set 200 and a waveguide lens 300.

The optical engine 100 is used for emitting image light. In this embodiment, the optical device 100 may adopt a panel for Emitting Light, such as LCoS (Liquid Crystal on Silicon), laser Beam Scanning (LBS), micro LED (Micro Light Emitting Diode), micro OLED (Micro Active-matrix organic Light Emitting Diode), and the like.

The prism set 200 is disposed on the light-emitting path of the optical engine 100, the prism set 200 may include an incident surface, an exit surface, and an odd number of reflecting surfaces, and the image light emitted from the optical engine 100 sequentially passes through the incident surface, the odd number of reflecting surfaces, and the exit surface, so that the image formed on the exit surface by the image light rotates by 90 ° relative to the image formed on the incident surface by the image light. The odd number may be three, five, seven or more, and may be set according to actual conditions. That is, the exit pupil is deflected by 90 ° with respect to the entrance pupil, so that the longitudinal dimension X of the image light emitted from the optical engine 100 can be converted into the lateral dimension of the image, and the lateral dimension Y of the image light emitted from the optical engine 100 can be converted into the longitudinal dimension of the image, that is, the lateral dimension of the image formed by the optical engine 100 is X, and the longitudinal dimension is Y. Therefore, a large transverse field of view can be obtained by increasing the longitudinal dimension of the optical engine 100 without increasing the transverse dimension of the optical engine 100, and when the AR eyeglass assembly 10 is applied to the AR eyeglasses 1, the increase of the longitudinal dimension of the optical engine 100 does not affect the wearing comfort of the AR eyeglasses 1.

The waveguide lens 300 is attached to the exit surface of the prism assembly 200, and the waveguide lens 300 is used for reflecting the image light to human eyes and transmitting ambient light.

When the AR glasses assembly 10 is applied to the AR glasses 1, an included angle conforming to ergonomics can be maintained and fixed between the optical machine 100 and the waveguide lens 300, so that a user can wear the AR glasses more comfortably. Specifically, the angle may be any angle between 5 ° and 20 °.

The AR glasses subassembly 10 that this application embodiment provided is through setting up turning prism group for the image light that ray apparatus 100 sent is in the image that forms on the exit surface is relative image light is in the image rotation 90 that forms on the entrance surface, simultaneously with the entrance surface of turning prism group with contained angle between the exit surface is the acute angle, makes this AR glasses subassembly 10 picture long edge direction that people's eye seen through the optical waveguide can accord with the long edge direction who expects the picture when using, and all can have an contained angle usually between the mirror leg of the glasses of daily use and the lens, and this contained angle can let the person of wearing more comfortable when using. The problem of among the prior art in the near-eye display system that uses the optical waveguide, factors such as the encapsulation and the structural appearance that are limited to the space light debugger lead to being difficult to have above-mentioned two kinds of characteristics concurrently is solved.

Further, referring to fig. 2, in some embodiments, the folding prism set 200 may include a first prism 210, a second prism 220, and a third prism 230 that are sequentially attached to each other, and the first prism 210, the second prism 220, and the third prism 230 are all provided with a reflecting surface for changing a path of an image light in the folding prism. In this embodiment, the turning prism set may include three prisms, and other embodiments, such as the turning prism set, may include five prisms, seven prisms, etc., are the same as the above embodiments. A prism with three total reflection surfaces is introduced into the light path, and the three reflection surfaces are arranged according to a certain direction. The incident light is reflected three times and then exits in a direction parallel to the incident light, and the exit pupil deflects 90 degrees relative to the entrance pupil, so that the longitudinal dimension of the panel corresponds to the lateral dimension of the image formed by the panel. Since an increase in the longitudinal dimension of the panel does not significantly increase the design difficulty of the AR glasses 1, a larger transverse field of view can be obtained by increasing this dimension.

The embodiment of the present application uses first prism 210 as a triangular prism, second prism 220 is a triangular prism, third prism 230 is a pentaprism, first prism 210 can include the incident surface, third prism 230 can include the exit surface as an example, it can be understood that the refraction prism can be the integrated into one piece structure as shown in fig. 3, also can be the split type structure as shown in fig. 2, this application does not limit the concrete shape of prism, for example, third prism 230 also can be the structure of a triangular prism, when the aforesaid first prism 210, second prism 220 and third prism 230 are the mosaic structure, first prism 210, second prism 220 and third prism 230 all are equipped with incident surface, reflecting surface and exit surface can. The refractive prism of the split structure in the present embodiment is explained in detail as follows:

further, the first prism 210 may include: a first incident surface 211, a first exit surface 212, and a first reflecting surface 213 connected between the first incident surface 211 and the first exit surface 212.

The second prism 220 may include: a second incident surface 221, a second emission surface 222, and a second reflection surface 223 connected between the second incident surface 221 and the second emission surface 222.

The third prism 230 may include: a third incident surface 231, a third emission surface 232, and a third reflecting surface 233 connected between the third incident surface 231 and the third emission surface 232. In some embodiments, the length of the third incident surface 231 may be 10.3mm, and the horizontal length of the third exit surface 232 may be 8.8mm.

The first exit surface 212 is attached to the second incident surface 221, the second exit surface 222 is attached to the third incident surface 231, and the third exit surface 232 is attached to the waveguide lens 300. The image light sequentially passes through the first prism 210, the second prism 220, and the third prism 230 to the waveguide lens 300.

By using the prism combination 200, the image can be rotated and transformed along the optical axis direction without changing the light propagation direction of the image, please refer to fig. 4, taking the first prism 211 as an example, and the specific principle is as follows:

the effect of single right angle triangular prism to incident image light is unanimous with the speculum, and as shown in fig. 3, real object A is virtual image A ' behind the right angle triangular prism, and the image on the relative emitting surface of image on the incident surface has taken place 90 deflection along the propagation direction of image light, promptly, real object A's horizontal size equals with virtual image A's vertical dimension, real object A's vertical dimension equals with virtual image A's horizontal dimension. Based on the image, the image of the incident image light after passing through the three right-angle triangular prisms can be obtained, the emergent direction of the image light is consistent with the incident direction, the difference is that the image on the incident surface is rotated by 90 degrees relative to the image on the emergent surface along the propagation direction of the image light, the transverse dimension Y of the incident image is changed into the longitudinal dimension X of the emergent image, and the longitudinal dimension X of the incident image is changed into the transverse dimension Y of the emergent image.

Referring to fig. 3, 5 and 6 together, further, in some embodiments, the third prism 230 may further include: a first transition surface 234 and a second transition surface 235, wherein the first transition surface 234 is disposed between the third incident surface 231 and the third reflecting surface 233, the second transition surface 235 is disposed between the third reflecting surface 233 and the third exit surface 232, and in the bottom surface projection to the third prism 230, the third exit surface232 and the included angle is theta ₂ The complementary angle of the included angle between the third exit surface 232 and the third incident surface 231 is θ ₁ Theta of ₁ And theta ₂ The following relationship is satisfied: 2 x theta ₂ +θ ₁ =90 ° to make the wearer more comfortable to use. The third prism 230 may also be a triangular prism, that is, the first transition surface 234 and the second transition surface 235 are coplanar with the third reflection surface 233. If the third prism 230 is a triangular prism, an included angle between the incident surface of the third prism 230 and the exit surface of the third prism 230 may be between 5 ° and 20 °.

Referring to fig. 7, the present embodiment further provides an AR glasses 1, which may include the above-mentioned AR glasses assembly 10 and a frame 20, where the frame 20 may include: a frame 21 and a side 22, the side 22 is connected to the frame 21, the optical machine 100 is disposed in the side 22, the folding prism group 200 is connected to the frame 21, and the waveguide lens 300 is disposed on the frame 21. A large transverse field of view can be obtained by increasing the longitudinal size of the optical machine 100, and the longitudinal size of the optical machine 100 does not affect the wearing comfort of the AR glasses 1, so that the large transverse field of view can be obtained on the basis of not affecting the wearing comfort of the AR glasses 1.

Further, in the present embodiment, the optical engine 100 is a cylindrical optical engine 100, and the extending direction of the optical engine 100 coincides with the extending direction of the glasses legs 22. The light outgoing direction of the optical engine 100 is also overlapped with the extending direction of the temple 22.

The AR glasses 1 that this application embodiment provided is through setting up the turning prism group for the image light that ray apparatus 100 sent is in the image that forms on the exit surface is relative image light is in rotatory 90 of the image that forms on the entrance surface, simultaneously with the entrance surface of turning prism group with contained angle between the exit surface is the acute angle, makes this AR glasses subassembly 10 picture long edge direction that people's eye seen through the optical waveguide when using can accord with the long edge direction who expects the picture, and can all have an contained angle usually between the mirror leg 22 of the glasses of daily use and the lens, and this contained angle can let the person of wearing use more comfortable when using. The problem of among the prior art in the near-eye display system that uses the optical waveguide, factors such as the encapsulation and the structural appearance that are limited to the space light debugger lead to being difficult to have above-mentioned two kinds of characteristics concurrently is solved.

The description of the terms "some embodiments," "other embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiments or examples is included in at least one embodiment or example of the application. In this application, the schematic representations of the terms used above are not necessarily intended to be the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the various embodiments or examples and features of the various embodiments or examples described in this application can be combined and combined by those skilled in the art without conflicting.

The above embodiments are only for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims (10)

1. An AR eyeglass assembly, comprising:

the optical machine is used for emitting image light;

the folding prism group is arranged on a light-emitting path of the optical machine and comprises an incident surface, an emergent surface and odd reflecting surfaces, and image light emitted by the optical machine sequentially passes through the incident surface, the odd reflecting surfaces and the emergent surface, so that an image formed on the emergent surface by the image light rotates by 90 degrees relative to an image formed on the incident surface by the image light; and

the waveguide lens is attached to the emergent surface of the folding prism group, and is used for transmitting the image light to human eyes and transmitting ambient light;

wherein an included angle between the incident surface and the exit surface is between 1 ° and 30 °.

2. The AR spectacle assembly of claim 1 wherein the angle between the entrance face and the exit face is between 5 ° and 20 °.

3. The AR eyeglass assembly of claim 1 wherein the folding prism assembly comprises a first prism, a second prism, and a third prism attached in sequence, the first prism, the second prism, and the third prism each having a reflective surface thereon.

4. The AR eyeglass assembly of claim 3,

the first prism includes: the light source comprises a first incident surface, a first emergent surface and a first reflecting surface connected between the first incident surface and the first emergent surface;

the second prism includes: the second incident surface, the second emergent surface and the second reflecting surface are connected between the second incident surface and the second emergent surface;

the third prism includes: a third incident surface, a third exit surface, and a third reflecting surface connected between the third incident surface and the third exit surface;

the first emergent surface is attached to the second incident surface, the second emergent surface is attached to the third incident surface, and the third emergent surface is attached to the waveguide lens.

5. The AR eyeglass assembly of claim 4 wherein the first prism is a triple prism, the second prism is a triple prism, the third prism is a pentaprism, the first prism comprises the entrance face, and the third prism comprises the exit face.

6. The AR eyewear component of claim 4, wherein the first, second, and third reflective surfaces are fully reflective surfaces.

7. The AR eyeglass assembly of claim 4, wherein the third prism further comprises: first transition face and second transition face, first transition face set up in the third incident surface with between the third plane of reflection, the second transition face sets up the third plane of reflection with between the third emitting surface, in the bottom surface projection of third prism, the third emitting surface with the contained angle of third plane of reflection is theta ₂ The complementary angle of the included angle between the third emergent surface and the third incident surface is theta ₁ Theta of ₁ And theta ₂ The following relationship is satisfied: 2 x theta ₂ +θ ₁ ＝90°。

8. The AR eyeglass assembly of claim 1 wherein the folding prism assembly is a one-piece structure.

9. AR eyewear comprising the AR eyewear assembly of any of claims 1-8 and a frame, the frame comprising: picture frame and mirror leg, the mirror leg with the picture frame is connected, the ray apparatus is arranged in the mirror leg, the prism group of turning over with the picture frame is connected, the waveguide lens set up in the picture frame.

10. The AR glasses of claim 9, wherein the carriage is a cylindrical carriage, an extension direction of the carriage coinciding with an extension direction of the temple.

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