WO2023066390A1

WO2023066390A1 - Optical device, optical system, display device, display apparatus and display system

Info

Publication number: WO2023066390A1
Application number: PCT/CN2022/126801
Authority: WO
Inventors: 翁志彬; 来颖
Original assignee: 小派科技（上海）有限责任公司
Priority date: 2021-10-22
Filing date: 2022-10-21
Publication date: 2023-04-27
Also published as: CN113934000A

Abstract

The present application relates to the field of virtual reality/augmented reality display, and provided are an optical device, an optical system, a display device, a display apparatus and a display system. The optical device comprises an image source, a collimating prism and a light guiding mechanism, wherein the interior of the collimating prism comprises a first reflecting surface and a second reflecting surface, and the first reflecting surface and the second reflecting surface shape image light entering the collimating prism into collimated image light; and the light guiding mechanism couples the collimated image light into the interior of the light guiding mechanism for propagation, and couples out the collimated image light propagating in the light guiding mechanism. The image light used for display is emitted from the image source; after the image light enters the collimating prism, the first reflecting surface and the second reflecting surface shape the image light into collimated image light; and then the collimated image light is coupled into the light guiding mechanism for propagation, and then the light guiding mechanism couples out the collimated image light for viewing. In the present application, only the first reflecting surface and the second reflecting surface are used for collimation; therefore, the entire optical path structure is more compact, and the present application has a small overall size, is lightweight, and has low costs.

Description

Optical device, optical system, display device, display device, and display system

technical field

The present application relates to the field of virtual reality/augmented reality display, in particular to an optical device, an optical system, a display device, a display device and a display system.

Background of the invention

One of the most widely used solutions for virtual reality/augmented reality display devices is geometric light waveguide architecture. The optical modules of this solution include: microdisplay, eyepiece group and light waveguide. The interior of the optical waveguide is set as several array reflective surfaces with the same angle, and the reflective surfaces are coated with an anti-reflection dielectric film layer. The microdisplay is arranged at the front end of the eyepiece group for emitting light. The eyepiece group is located at the coupling end of the optical waveguide, and is used for shaping the image light emitted by the display into parallel light and coupling it into the optical waveguide. The light propagates through total reflection in the optical waveguide, and is coupled out to human eyes after passing through the array reflective surface in the optical waveguide. In related technologies, it is necessary to use a lens group composed of many lenses to collimate the image light. The structure of the lens group is generally relatively complicated, occupying a large volume and heavy weight, which will increase the volume of the entire virtual reality/augmented reality display device and weight, reducing the ease of use.

Contents of the invention

In view of this, the present application provides an optical device, an optical system, a display device, a display device and a display system, which can complete the collimation of image light with smaller volume and lighter weight.

In order to solve the above technical problems, the present application provides a near-eye display optical device, which includes: an image source emitting image light; a collimating prism installed in the light emitting direction of the image source, and the inside of the collimating prism includes a first A reflective surface and a second reflective surface, the first reflective surface is located in the light emitting direction of the image source, the second reflective surface is located in the reflective direction of the first reflective surface, the first reflective surface and The common structure of the second reflecting surface is: shaping the image light entering the collimating prism into collimated image light; The configuration is: coupling the collimated image light into the interior of the light guide mechanism for propagation, and coupling out the collimated image light propagated in the light guide mechanism.

Optionally, both the reflective surface of the first reflective surface and the reflective surface of the second reflective surface are free-form surfaces.

Optionally, the included angle between the optical axis of the image source and the normal at the geometric center of the first reflective surface is any value from 0° to 90°, and the normal at the geometric center of the first reflective surface The included angle between the line and the normal at the geometric center of the second reflective surface is any value from 0° to 90°.

Optionally, one side of the first reflective surface is in contact with one side of the second reflective surface.

Optionally, the interior of the collimating prism further includes: a first transmission surface disposed on an optical path between the image source and the first reflection surface.

Optionally, the optical surface of the first transmission surface is a free-form surface.

Optionally, the interior of the collimating prism further includes: a second transmissive surface disposed on an optical path between the second reflective surface and the light guiding mechanism.

Optionally, the optical surface of the second transmission surface is a free-form surface.

Optionally, the light guide mechanism includes: an optical waveguide; an in-coupling component installed on one side of the optical waveguide, the in-coupling component is located in the reflection direction of the second reflective surface, and the in-coupling component The assembly is configured to: couple the collimated image light emitted by the collimating prism into the interior of the optical waveguide for total reflection propagation; and an outcoupling assembly installed on the optical waveguide, the outcoupling assembly The method is: coupling out the collimated image transmitted by total reflection in the optical waveguide to the outside of the optical waveguide.

Optionally, the coupling component is a polygonal prism, the coupling component includes a first surface and a second surface, the first surface is partially attached to one side of the optical waveguide, and the second The surface is located in the reflection direction of the second reflection surface.

In another embodiment, the present application provides an optical system, including: the aforementioned near-eye display optical device, two of the near-eye display optical devices are respectively used as a left-eye viewing component and a right-eye viewing component, and the left-eye viewing component and the The right-eye viewing components are symmetrically distributed.

In another embodiment, the present application provides a display device, which is applied to a virtual reality device or an augmented reality device. The display device includes: the aforementioned optical system and a fixed structure, and the near-eye display optical device is connected to the fixed structure. .

Optionally, the display device further includes: a head wearing component connected to the fixing structure, and the head wearing component is used to be worn on a person's head.

Optionally, the display device further includes: a casing, and the optical system is accommodated in the casing.

Optionally, the display device further includes: a camera whose lens faces human eyes.

In another embodiment, the present application provides a head-mounted display device, including the aforementioned display device, wherein the head-mounted assembly includes a spectacle frame, the spectacle frame includes temples or a headband, and the optical system is fixed between the temples or the headband.

In another embodiment, the present application provides a display system, the display system is a virtual reality and/or augmented reality display system, characterized in that the display system includes a signal input module and the aforementioned head-mounted display device, The head-mounted display device receives the signal from the signal input module and transmits it to the head-mounted display device for processing.

Optionally, the signal input module includes an operation controller electrically connected to the head-mounted display device.

Optionally, the display system is a virtual and/or augmented reality display all-in-one machine, and the head-mounted display device is provided with an independent central processing unit for controlling the operation controller and displaying content.

The beneficial effect of the present application is reflected in that: when in use, the image light emitted by the image source for display is divergent light emitted by each pixel of the image source. After the image light is incident into the collimating prism, the first reflective surface and the second reflective surface shape the image light into collimated image light, and then the collimated image light is coupled into the light guide mechanism for propagation, and then the light guide mechanism will collimate the image light The image light is coupled out for viewing, and the image light coupled out from the light guide mechanism is focused at infinity. The collimation of the image light can be realized through the first reflective surface and the second reflective surface, without using the complex structure of collimating lens groups composed of multiple lenses in the traditional technology. Only the first reflective surface and the second reflective surface are used to realize collimation, the overall optical path structure is more compact, the overall volume is small, the weight is light, and the cost is low.

Brief description of the drawings

FIG. 1 is a schematic structural diagram of a near-eye display optical device provided by the first embodiment of the present application.

FIG. 2 is a schematic structural diagram of a near-eye display optical device provided by the second embodiment of the present application.

FIG. 3 is a schematic structural diagram of a display system provided by a third embodiment of the present application.

Ways to implement this application

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some, not all, embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

The present application provides a near-eye display optical device, including an image source, a collimating prism, and a light guide mechanism. The image source is used to emit image light, and the collimating prism is installed in the light emitting direction of the image source. The interior of the collimating prism includes a first reflective surface and a second reflective surface, the first reflective surface is located in the light emitting direction of the image source, and the second The reflective surface is located in the reflective direction of the first reflective surface, and the first reflective surface and the second reflective surface are jointly configured to: shape the image light entering the collimating prism into collimated image light. The light guide mechanism is installed on the light emitting direction of the second reflection surface, and the light guide mechanism is configured to couple the collimated image light into the light guide mechanism for propagation, and couple the collimated image light propagating in the light guide mechanism out.

The present application provides a near-eye display optical device. In this embodiment, as shown in FIG. 1 , it includes an image source 1 , a collimating prism 2 and a light guide mechanism 3 . The image source 1 emits image light. The collimating prism 2 is installed on the light-emitting direction of the image source 1, and the inside of the collimating prism 2 includes a first reflective surface 21 and a second reflective surface 22, the first reflective surface 21 is located on the light-emitting direction of the image source 1, and the second reflective surface The surface 22 is located in the reflection direction of the first reflection surface 21 , and the first reflection surface 21 and the second reflection surface 22 are jointly configured to shape the image light entering the collimating prism 2 into collimated image light. The light guide mechanism 3 is installed on the light emitting direction of the second reflective surface 22, and the light guide mechanism 3 is configured to: couple the collimated image light into the inside of the light guide mechanism 3 for transmission, and collimate the light propagating in the light guide mechanism 3 The image is optocoupled out.

In use, image light for display is emitted from the image source 1 , and the image light emitted by each pixel of the image source 1 is divergent light. After the image light enters the collimating prism 2, the first reflective surface 21 and the second reflective surface 22 shape the image light into collimated image light, and then the collimated image light is coupled into the light guide mechanism 3 for propagation, and then the light is guided The mechanism 3 couples out the collimated image light for viewing, and the image light coupled out from the light guiding mechanism 3 is focused at infinity.

Specifically, the image source 1 may be a transmissive image source, a reflective image source or a self-illuminating image source, wherein the self-illuminating image source may include a micro OLED display, a MEMS scanning display or a light scanning display and the like. The light guiding mechanism 3 may be a reflective array waveguide or a diffractive optical waveguide. This kind of waveguide needs the image light coupled in to be collimated light to achieve total reflection propagation in the waveguide. The first reflective surface 21 and the second reflective surface 22 can be made in the following ways: inside the collimating prism 2, medium surfaces with different refractive indices are used as the first reflective surface 21 and the second reflective surface 22; or in the collimating prism 2 The first reflective surface 21 and the second reflective surface 22 are formed internally by means of coating; The surface 21 and the second reflective surface 22 are integrated inside the collimating prism 2 .

In this embodiment, the collimation of image light can be realized through the first reflective surface 21 and the second reflective surface 22 , without using the complex structure of collimating lens groups composed of multiple lenses in the conventional technology. Only the first reflective surface 21 and the second reflective surface 22 are used to achieve collimation, the optical path structure is more compact, the overall volume is small, the weight is light, and the cost is low.

As shown in FIG. 1 , the reflective surface of the first reflective surface 21 and the reflective surface of the second reflective surface 22 are both free-form surfaces.

In use, the first reflective surface 21 and the second reflective surface 22 whose reflective surfaces are free-form surfaces realize collimation of image light. When the divergent image light emitted by the image source 1 is irradiated on the first reflective surface 21, the first reflective surface 21 performs reflective first shaping to the image light, and the image light after the first shaping is then reflected by the second reflection. The surface 22 undergoes a reflective second shaping, and the image light after the second shaping becomes collimated light. In this embodiment, the collimation of the image light is realized through two free-form surfaces, and the two free-form surfaces can realize the off-axis shaping of the image light with a small occupied volume, without using complicated lens groups to realize the collimation. Since the first reflective surface 21 and the second reflective surface 22 are both free-form surfaces, the collimation of image light can be realized in various relative orientations. In the case of different relative orientations, for the first reflective surface 21 and the second reflective surface 22 Design a suitable face shape. In this embodiment, the positions of the first reflective surface 21 and the second reflective surface 22 can be adaptively adjusted according to different packaging requirements of the entire near-eye display optical device. For different positions, it is sufficient to design a suitable shape of the reflective surface. Therefore, the first reflective surface 21 and the second reflective surface 22 can also improve the flexibility of assembly, and can adapt to different packaging requirements of near-eye display optical devices.

Specifically, the surface parameters of the first reflective surface 21 and the second reflective surface 22 need to be designed according to the relative positions of the two. Generally, optical design software can be used to simulate and design what kind of reflectors need to be used in a certain relative position. The surface shape can realize the collimation and shaping of the image light.

As shown in Figure 1, the included angle between the optical axis of the image source 1 and the normal at the geometric center of the first reflective surface 21 is any value from 0° to 90°, and the angle at the geometric center of the first reflective surface 21 is The included angle between the normal and the normal at the geometric center of the second reflective surface 22 is any value from 0° to 90°.

When in use, the image source 1, the first reflective surface 21 and the second reflective surface 22 form a folded reflective optical path, forming this folded optical path can further reduce the volume of the collimating prism 2, and the image light can be aligned with a small volume. collimation. The arrangement orientation of the image source 1, the first reflective surface 21 and the second reflective surface 22 can be arranged as shown in Figure 1 or Figure 3, and the specific angle value needs to be determined according to the first reflective surface 21 and the second reflective surface. The surface shape of the reflective surface of the surface 22 is optically designed.

In use, as shown in FIG. 1 , the inside of the collimating prism 2 may further include a first transmission surface 23 , and the first transmission surface 23 is arranged on the optical path between the image source 1 and the first reflection surface 21 .

In use, the first transmission surface 23 refracts the image light emitted by the image source 1 , thereby changing the optical path of the image light emitted by the image source 1 . Through the first transmissive surface 23 , the position of the image source 1 can be changed without changing the shape of the first reflective surface 21 and the second reflective surface 22 . The first transmissive surfaces 23 with different refractive powers may correspond to different relative positions of the image source 1 and the collimating prism 2 . Specifically, the different refractive capabilities of the first transmissive surface 23 may refer to different manufacturing materials, different placement angles of the first transmissive surface 23 , and different thicknesses of the first transmissive surface 23 . This embodiment can improve the flexibility of the system. The image source 1 can have more positions and angles relative to the collimating prism 2, and the appropriate first transmission surface 23 can be selected according to the design requirements of the entire near-eye display optical device.

As shown in FIG. 1 and FIG. 2 , the optical surface of the first transmission surface 23 is a free-form surface.

When in use, firstly, under the action of refraction of the first transmissive surface 23, the optical path of the image light emitted by the image source 1 can be changed, which can improve the flexibility of the system, and the image source 1 can have more placement positions and angles. Furthermore, the first transmission surface 23 of the free-form surface has a better shaping ability for image light, and can shape the image light to a certain extent before the image light irradiates on the first reflection surface 21 , further improving system flexibility. Moreover, the first transmissive surface 23 cooperates with the first reflective surface 21 and the second reflective surface 22 to jointly shape the image light, which can reduce the design difficulty of the first reflective surface 21 and the second reflective surface 22 .

As shown in FIG. 1 , the inside of the collimating prism 2 may further include a second transmissive surface 24 , and the second transmissive surface 24 is arranged on the optical path between the second reflective surface 22 and the light guide mechanism 3 .

In use, the second transmissive surface 24 refracts the image light emitted from the second reflective surface 22 , thereby changing the optical path of the image light emitted from the second reflective surface 22 . Through the second transmissive surface 24 , without changing the surface shapes of the first reflective surface 21 and the second reflective surface 22 , the light output path of the second reflective surface 22 can be changed. The second transmissive surfaces 24 with different refractive powers may correspond to different relative positions of the collimating prism 2 and the light guiding mechanism 3 . Specifically, the different refractive capabilities of the second transmissive surface 24 may refer to different manufacturing materials, different placement angles of the second transmissive surface 24 , and different thicknesses of the second transmissive surface 24 . This embodiment can improve the flexibility of the system. The collimating prism 2 can have more placement positions and angles relative to the light guide mechanism 3, and can select a suitable second transmission surface 24 according to the design requirements of the entire near-eye display optical device. .

As shown in FIG. 1 , the optical surface of the second transmission surface 24 is a free-form surface.

When in use, firstly, under the refraction effect of the second transmissive surface 24, the optical path of the image light emitted by the image source 1 can be changed, which can improve the flexibility of the system, and the collimating prism 2 can have more placements relative to the light guide mechanism 3 position and angle. Furthermore, the second transmission surface 24 of the free-form surface has a better shaping ability for the image light, and can shape the image light to a certain extent before the image light irradiates the light guide mechanism 3 , further improving the flexibility of the system. Moreover, the second transmissive surface 24 cooperates with the first reflective surface 21 and the second reflective surface 22 to jointly shape the image light, which can reduce the design difficulty of the first reflective surface 21 and the second reflective surface 22 .

FIG. 2 is a schematic structural diagram of a near-eye display optical device provided by the second embodiment of the present application. The difference between this embodiment and the aforementioned embodiments lies in that, as shown in FIG. 2 , one side of the first reflective surface 21 is in contact with one side of the second reflective surface 22 . Other structures and designs of this embodiment can adopt the same structure and design as that of the first embodiment.

When in use, since one side of the first reflection surface 21 is in contact with one side of the second reflection surface 22, the volume of the collimating prism 2 can be made smaller, and the folded optical path formed by the first reflection surface 21 and the second reflection surface 22 is more compact. compact. The included angle between the normal at the geometric center of the first reflective surface 21 and the normal at the geometric center of the second reflective surface 22 is close to 90°, and the folded optical path in the collimating prism 2 is close to the cross optical path, which can occupy a smaller volume Folding the optical path is realized, that is, the collimation of the image light is realized.

As shown in FIG. 1 and FIG. 2 , the light guiding mechanism 3 includes: an optical waveguide 31 , an in-coupling component 32 and an out-coupling component 33 . The coupling component 32 is installed on one side of the optical waveguide 31, the coupling component 32 is located in the reflection direction of the second reflective surface 22, and the coupling component 32 is configured to: couple the collimated image light emitted by the collimating prism 2 into the light Total reflection propagation is performed inside the waveguide 31 . The outcoupling component 33 is installed on the optical waveguide 31 , and the outcoupling component 33 is configured to: outcouple the collimated image propagated through total reflection in the optical waveguide 31 to the outside of the optical waveguide 31 .

When in use, the collimated image light is coupled into the optical waveguide 31 through the coupling component 32, and propagates through total reflection inside the optical waveguide 31, and the optical waveguide 31 expands the pupil of the collimated image light, so that the collimated image light can be viewed The area is bigger. Specifically, components such as prisms and gratings can be used for the coupling component 32 , and components such as array reflective surfaces and gratings can be used for the coupling component 33 .

When the outcoupling component 33 is an array reflective surface, the array reflective surface is disposed inside the optical waveguide 31 . Specifically, the reflective surfaces arranged in the array are all partially transmissive and partially reflective surfaces. When the collimated image light is irradiated on the reflective surface arranged in the array, a part of the light is reflected and the angle cannot satisfy the total reflection condition of the optical waveguide 31, and is reflected The collimated image light is emitted from the optical waveguide 31 to the outside of the optical waveguide 31, and the outgoing collimated image light can be imaged outside the optical waveguide 31. Since it is collimated light, the image is formed at infinity. The unreflected image light passes through the current reflective surface and then irradiates the next reflective surface for reflection and refraction again. The transmittance of the reflective surfaces arranged in an array can decrease sequentially along the direction away from the coupling-in component 32 , so that the brightness of the image light coupled out from the entire optical waveguide 31 is more uniform. The reflective surfaces arranged in an array and the optical waveguide 31 constitute a reflective array waveguide in the traditional sense.

When the outcoupling component 33 is a grating, the grating is disposed inside or on the surface of the optical waveguide 31 . The grating can change the propagation angle of the collimated image light irradiated on the grating, so that the collimated image light is coupled out of the optical waveguide 31 for imaging. The diffraction efficiency of the grating is pre-designed so that the brightness of the collimated image light coupled out along the direction away from the coupling-in component 32 is uniform. The grating and optical waveguide 31 constitute a diffractive optical waveguide in the conventional sense.

When in use, the collimated image light shaped by the collimating prism 2 can be dilated, so that the visible range is larger, so as to achieve a better viewing experience and facilitate viewing of image content emitted by the image source 1 .

As shown in Figures 1 and 2, the coupling component 32 is a polygonal prism, the coupling component 32 includes a first surface 321 and a second surface 322, the first surface 321 is partially attached to one side of the optical waveguide 31, the second The two surfaces 322 are located in the reflection direction of the second reflection surface 22 .

In use, the coupling component 32 uses a prism to couple collimated image light into the optical waveguide 31 , the collimated image light enters the coupling component 32 from the second surface 322 , and the collimated image light exits from the first surface 321 . The optical path direction of the collimated image light is changed by the coupling-in component 32 , so that the total reflection condition of the optical waveguide 31 can be satisfied. The bonding of the first surface 321 and the optical waveguide 31 can save space and make the whole structure more compact.

As shown in FIGS. 1 and 2 , the surface of the collimating prism 2 facing the coupling component 32 is parallel to the second surface 322 . It can further save space and make the structure more compact. The surface of the collimating prism 2 facing the coupling component 32 and the second surface 322 can also be attached to each other to further save space.

The present application provides an optical system, which includes: the aforementioned near-eye display optical device, two near-eye display optical devices are respectively used as a left-eye viewing component and a right-eye viewing component, and the left-eye viewing component and the right-eye viewing component are symmetrically distributed . In use, the user's left and right eyes view images from the two near-eye display optics, respectively.

The present application also provides a display device, which is applied to a virtual reality device or an augmented reality device. In some embodiments, the display device includes the aforementioned optical system and a fixed structure, and the near-eye display optical device is connected to the fixed structure.

When in use, when the human eye is in the outcoupling direction of the outcoupling component, virtual reality or augmented reality images can be viewed, and the compact and lightweight near-eye display optical device can reduce the weight, volume and structural complexity of the display device, making The entire display device is more portable, occupies a small volume, and has a simple structure. Specifically, the display device may be a transmissive/non-transmissive display type virtual reality/augmented reality product, or a head-mounted virtual reality/augmented reality product. The fixed structure provides support for the optical system, avoiding the displacement of various parts of the optical system during use, so as to ensure the durability of the optical system.

The display device also includes a head wearing component connected to the fixed structure, and the head wearing component is used to be worn on a person's head.

When in use, the display device can be worn on the user's head through the head wearing component, and the user's head provides support for the display device, and can conveniently watch virtual reality or augmented reality images. The portable display device can make the user not too tired after wearing it for a long time.

Optionally, the display device further includes a housing and a camera, the optical system is accommodated in the housing, and the housing can effectively protect the optical system from damage to the optical system. The lens of the camera faces the human eye, and the camera can be used to perform an eye-tracking function. When the display device is working, the camera captures the human eye at all times to obtain the fixation point of the human eye.

The present application also provides a head-mounted display device, including the aforementioned display device, wherein the head-mounted component includes a spectacle frame, the spectacle frame includes temples or a headband, and an optical system is fixed between the temples or the headband. In this embodiment, the temples or the headband can be hung on the user's ears or worn on a certain part of the head. The device is conveniently worn on the user's head, providing the user with a virtual reality display or an augmented reality display.

Optionally, the head-mounted display device includes the optical system and a buckle disposed therein, and the buckle is used to fix the optical system in front of human eyes. In use, the clasp holds the optical system in front of the human eye for viewing by the human eye.

FIG. 3 is a schematic structural diagram of a display system provided by a third embodiment of the present application. The present application also provides a display system, the display system is a virtual reality and/or augmented reality display system, as shown in Figure 3, the display system includes a signal input module 4 and the aforementioned head-mounted display device, the head-mounted display device receives The signal of the signal input module 4 is transmitted to the head-mounted display device for processing. The signal input module 4 includes an operation controller electrically connected to the head-mounted display device. Specifically, the operation controller may be a handle or a device capable of recognizing gestures. Optionally, the display system is a virtual and/or augmented reality display all-in-one machine, and the head-mounted display device is provided with an independent central processing unit 5 for controlling the operation controller and displaying content.

In some embodiments, as shown in FIG. 3 , the display system further includes a memory 6 , the central processing unit 5 is electrically connected to the image source 1 and the signal input module 4 respectively, and the memory 6 is used to store executable instructions of the central processing unit 5 .

When used, the central processor 5 may be a central processing unit (CPU) or other form of processing unit having data processing capabilities and/or instruction execution capabilities, and may control other components in the display system to perform desired functions.

Memory 6 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The volatile memory may include random access memory (RAM) and/or cache memory (cache), etc., for example. Non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, and the like. One or more computer program instructions can be stored on the computer-readable storage medium, and the central processing unit 5 can run the program instructions to control the image source 1 to emit image light.

The signal input module 4 can be interconnected with the central processing unit 5 through a bus system and/or other forms of connection mechanisms (not shown), and the signal input module 4 can include, for example, a keyboard, a mouse, a rocker, a touch screen, and the like.

Of course, for simplicity, only some components in the display system related to the present application are shown in FIG. 3 , and components such as buses, input/output interfaces, etc. are omitted. Besides, the display system may also include any other suitable components according to specific applications.

The basic principles of the present application have been described above in conjunction with specific embodiments, but it should be pointed out that the advantages, advantages, effects, etc. mentioned in the application are only examples rather than limitations, and these advantages, advantages, effects, etc. Various embodiments of this application must have. In addition, the specific details disclosed above are only for the purpose of illustration and understanding, rather than limitation, and the above details do not limit the application to be implemented by using the above specific details.

The block diagrams of devices, devices, devices, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, devices, systems may be connected, arranged, configured in any manner. Words such as "including", "comprising", "having" and the like are open-ended words meaning "including but not limited to" and may be used interchangeably therewith. As used herein, the words "or" and "and" refer to the word "and/or" and are used interchangeably therewith, unless the context clearly dictates otherwise. As used herein, the word "such as" refers to the phrase "such as but not limited to" and can be used interchangeably therewith.

It should also be pointed out that in the device and equipment of the present application, each component can be decomposed and/or reassembled. These decompositions and/or recombinations should be considered equivalents of this application.

The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

The above is only a preferred embodiment of the application, and is not intended to limit the application. Any modifications, equivalent replacements, etc. made within the spirit and principles of the application shall be included in the protection scope of the application. within.

Claims

A near-eye display optical device, comprising:

an image source, emitting image light;

A collimating prism is installed in the light emitting direction of the image source, and the inside of the collimating prism includes a first reflective surface and a second reflective surface, and the first reflective surface is located in the light emitting direction of the image source, so The second reflective surface is located in the reflective direction of the first reflective surface, and the first reflective surface and the second reflective surface are jointly configured to: shape the image light entering the collimating prism into a collimated image light; and

A light guide mechanism, installed on the light emitting direction of the second reflective surface, the light guide mechanism is configured to: couple the collimated image light into the inside of the light guide mechanism for propagation, and guide the light The collimated image propagated within the body is optically outcoupled.
The near-eye display optical device according to claim 1, wherein,

Both the reflective surface of the first reflective surface and the reflective surface of the second reflective surface are free-form surfaces.
The near-eye display optical device according to claim 1 or 2, wherein,

The included angle between the optical axis of the image source and the normal at the geometric center of the first reflective surface is any value from 0° to 90°, and the normal at the geometric center of the first reflective surface and The included angle of the normal at the geometric center of the second reflective surface is any value from 0° to 90°.
The near-eye display optical device according to any one of claims 1 to 3, wherein,

One side of the first reflective surface is in contact with one side of the second reflective surface.
The near-eye display optical device according to any one of claims 1 to 4, wherein the interior of the collimating prism further comprises:

The first transmission surface is arranged on the optical path between the image source and the first reflection surface.
The near-eye display optical device according to claim 5, wherein,

The optical surface of the first transmission surface is a free-form surface.
The near-eye display optical device according to any one of claims 1 to 6, wherein the interior of the collimating prism further comprises:

The second transmission surface is arranged on the optical path between the second reflection surface and the light guide mechanism.
The near-eye display optical device according to claim 7, wherein,

The optical surface of the second transmission surface is a free-form surface.
The near-eye display optical device according to any one of claims 1 to 8, wherein the light guiding mechanism comprises:

optical waveguide;

an incoupling component installed on one side of the optical waveguide, the incoupling component is located in the reflection direction of the second reflective surface, and the incoupling component is configured to: output the collimating prism collimated image light is coupled into the interior of the optical waveguide for total reflection propagation; and

The outcoupling component is installed on the optical waveguide, and the outcoupling component is configured to: outcouple the collimated image propagated by total reflection in the optical waveguide to the outside of the optical waveguide.
The near-eye display optical device according to claim 9, wherein,

The coupling component is a polygonal prism, the coupling component includes a first surface and a second surface, the first surface is partially attached to one side of the optical waveguide, and the second surface is located on the In the reflection direction of the second reflection surface.
An optical system comprising:

Two near-eye display optical devices as described in any one of claims 1 to 10, the two near-eye display optical devices are respectively used as a left-eye viewing component and a right-eye viewing component, and the left-eye viewing component and the right-eye viewing component Visually observe that the components are distributed symmetrically.
A display device, applied to a virtual reality device or an augmented reality device, the display device comprising:

The optical system of claim 11; and

A fixing structure, the near-eye display optical device is connected to the fixing structure.
The display device according to claim 12, wherein the display device further comprises:

The head wearing component is connected with the fixed structure, and the head wearing component is used to be worn on the head of a person.
The display device according to claim 11, wherein the display device further comprises:

a housing, the optical system is accommodated in the housing.
The display device according to claim 11, wherein the display device further comprises:

A camera, the lens of the camera faces the human eye.
A head-mounted display device, comprising the display device according to claim 13, wherein the head-mounted assembly includes a spectacle frame, the spectacle frame includes temples or a headband, and the optical system is fixed to the mirror between the legs or headband.
A display system, the display system is a virtual reality and/or augmented reality display system, characterized in that the display system includes a signal input module and the head-mounted display device according to claim 16 or 17, the The head-mounted display device receives the signal from the signal input module and transmits it to the head-mounted display device for processing.
The display system according to claim 17, wherein,

The signal input module includes an operation controller electrically connected to the head-mounted display device.
The display system according to claim 17, wherein the display system is a virtual and/or augmented reality display all-in-one machine, and the head-mounted display device is provided with an independent central processing unit for controlling the operation controller and display content .