阅读说明：本技术 离轴反射式光学系统及电子设备 (Off-axis reflective optical system and electronic equipment ) 是由 邹成刚 邓建 郑效盼 吕向博 钟将为 于 2019-11-29 设计创作，主要内容包括：本申请实施例提出了一种离轴反射式光学系统及电子设备,在该离轴反射式光学系统中配置了曲面图像源及自由曲面反射镜,该曲面图像源采用光扫描组件和曲面屏构成,由该光扫描组件通过光束扫描在所述曲面屏上形成曲面图像,相对于传统的平面图像源,本申请能够得到更大的自由度,曲面图像源产生的光束经过自由曲面反射镜反射,能够得到较大的出瞳,提高整个离轴反射式光学系统的成像质量。(The embodiment of the application provides an off-axis reflective optical system and an electronic device, wherein a curved-surface image source and a free-form surface reflector are configured in the off-axis reflective optical system, the curved-surface image source is formed by adopting a light scanning assembly and a curved-surface screen, the light scanning assembly scans a light beam to form a curved-surface image on the curved-surface screen, compared with a traditional planar image source, the off-axis reflective optical system can obtain a larger degree of freedom, the light beam generated by the curved-surface image source is reflected by the free-form surface reflector, a larger exit pupil can be obtained, and the imaging quality of the whole off-axis reflective optical system is improved.)

1. An off-axis reflective optical system comprising a curved image source and a free-form mirror, wherein:

the curved image source comprises an optical scanning assembly and a curved screen, and the optical scanning assembly scans light beams on the curved screen to form a curved image;

and the free-form surface reflector reflects the light beam generated by the curved surface image to obtain a parallel light beam capable of generating a target exit pupil.

2. The off-axis reflective optical system of claim 1, wherein the curved screen is embodied as a curved microlens array to achieve diffusion of the light beam generated from the curved image.

3. The off-axis reflective optical system of claim 1 or 2, the curved screen having a first radius of curvature, the free-form mirror having a second radius of curvature, and the second radius of curvature being greater than the first radius of curvature.

4. The off-axis reflective optical system of claim 3, the curved screen having a first curved surface profile, the free-form mirror having a second curved surface profile;

the first curved surface type, the second curved surface type, the first curvature radius and the second curvature radius are determined by the off-axis reflective optical system by adopting a reverse optical path design according to a preset optimization condition, wherein the preset optimization condition comprises that the parallel light beams capable of generating the target exit pupil are obtained by emission of the free-form surface reflector.

5. The off-axis reflective optical system as claimed in claim 1, wherein said optical scanning assembly comprises a MEMS micro-mirror, and said MEMS micro-mirror scans a light beam to form a curved image on said curved screen.

6. The off-axis reflective optical system of claim 5, the light scanning assembly further comprising: a light source and a first mirror that reflects a light beam emitted by the light source to the MEMS micro-mirror.

7. The off-axis reflective optical system of claim 6, the light scanning assembly further comprising: the first lens is arranged between the light source and the first reflector, so that the light beam emitted by the light source enters the first reflector after passing through the parallel light beam generated by the first lens.

8. The off-axis reflective optical system of claim 6, wherein the light source is a laser light source and the first lens comprises a condenser lens.

9. An electronic device, comprising:

a fixing device for maintaining a relative positional relationship between a user and the electronic apparatus in a case where the user wears the electronic apparatus;

the image collector is used for collecting image information of an external environment;

a display assembly comprising the off-axis reflective optical system of any one of claims 1 to 7 in the fixture and having a first display surface disposed toward an eye of a user wearing the electronic device, the parallel light beams from the off-axis reflective optical system being incident on the user's eye through the first display surface;

and the processor is used for carrying out virtual modeling on the image information and displaying a virtual environment to the user through the display component.

10. The electronic device as claimed in claim 9, wherein the number of the off-axis reflective optical systems is two, and the two off-axis reflective optical systems are respectively located on both sides of a normal line of the first display surface and are symmetrically arranged.

Technical Field

The present application relates generally to the field of optical applications, and more particularly to an off-axis reflective optical system and an electronic device.

Background

With the development of computer communication technology, Virtual Reality (VR) technology and Augmented Reality (AR) technology have been gradually applied to many fields such as social platforms, games, medical treatment, educational training, car navigation, etc., which brings great convenience to people in the aspects of life, work, learning, entertainment, etc.

In order to improve various technical indexes and correct aberration, a display device is used as an important component of VR equipment or AR equipment (such as helmets, glasses and the like) worn by a user, and an optical system is often formed by using a plurality of lenses, reflectors, binary optical elements and the like, so that the optical system is complex in structure and large in size, and an image source in the existing optical system is a flat screen, so that an exit pupil obtained by the image source is small, and the imaging quality is reduced.

Disclosure of Invention

In view of this, the application provides an off-axis reflective optical system and an electronic device, which adopt a curved image source to replace a traditional planar image source, can generate a larger beam aperture, and obtain a larger exit pupil through reflection of a free-form surface reflector, thereby improving imaging quality.

In order to achieve the above object, the present application provides the following technical solutions:

in one aspect, an embodiment of the present application provides an off-axis reflective optical system, including a curved image source and a free-form surface mirror, where:

the curved image source comprises an optical scanning assembly and a curved screen, and the optical scanning assembly scans light beams on the curved screen to form a curved image;

and the free-form surface reflector reflects the light beam generated by the curved surface image to obtain a parallel light beam capable of generating a target exit pupil.

In some embodiments, the curved screen is embodied as a curved microlens array to achieve diffusion of the light beam generated from the curved image.

In some embodiments, the curved screen has a first radius of curvature, the free-form mirror has a second radius of curvature, and the second radius of curvature is greater than the first radius of curvature.

In some embodiments, the curved screen has a first curved surface profile and the free-form surface mirror has a second curved surface profile;

the first curved surface type, the second curved surface type, the first curvature radius and the second curvature radius are determined by the off-axis reflective optical system by adopting a reverse optical path design according to a preset optimization condition, wherein the preset optimization condition comprises that the parallel light beams capable of generating the target exit pupil are obtained by emission of the free-form surface reflector.

In some embodiments, the light scanning assembly comprises a MEMS micro-mirror, and the MEMS micro-mirror scans a light beam to form a curved image on the curved screen.

In some embodiments, the light scanning assembly further comprises: a light source and a first mirror that reflects a light beam emitted by the light source to the MEMS micro-mirror.

In some embodiments, the light scanning assembly further comprises: the first lens is arranged between the light source and the first reflector, so that the light beam emitted by the light source enters the first reflector after passing through the parallel light beam generated by the first lens.

In some embodiments, the light source is embodied as a laser light source, and the first lens comprises a condenser lens.

In another aspect, an embodiment of the present application further provides an electronic device, including:

a fixing device for maintaining a relative positional relationship between a user and the electronic apparatus in a case where the user wears the electronic apparatus;

the image collector is used for collecting image information of an external environment;

a display assembly comprising an off-axis reflective optical system as described above in the fixture and having a first display surface disposed toward an eye of a user wearing the electronic device, the parallel light beams from the off-axis reflective optical system being incident on the user's eye through the first display surface;

and the processor is used for carrying out virtual modeling on the image information and displaying a virtual environment to the user through the display component.

In some embodiments, the number of the off-axis reflective optical systems is two, and the two off-axis reflective optical systems are respectively located on two sides of the normal of the first display surface and are symmetrically arranged.

Therefore, compared with the prior art, the off-axis reflective optical system and the electronic equipment are provided, the off-axis reflective optical system is provided with the curved-surface image source and the free-form surface reflector, the curved-surface image source is formed by adopting the optical scanning assembly and the curved-surface screen, the optical scanning assembly scans the light beam on the curved-surface screen to form the curved-surface image, compared with the traditional plane image source, the off-axis reflective optical system can obtain larger degree of freedom, the light beam generated by the curved-surface image source is reflected by the free-form surface reflector, a larger exit pupil can be obtained, and the imaging quality of the whole off-axis reflective optical system is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of an alternative embodiment of an off-axis reflective optical system as proposed herein;

FIG. 2 is a block diagram illustrating an alternative example of a light scanning assembly in the off-axis reflective optical system proposed in the present application;

FIG. 3 is a block diagram illustrating an alternative example of yet another optical scanning assembly in the off-axis reflective optical system proposed in the present application;

FIG. 4 is a block diagram illustrating an alternative example of a further light scanning assembly in the off-axis reflective optical system proposed in the present application;

FIG. 5 illustrates a schematic structural diagram of an alternative embodiment of an electronic device as set forth in the present application;

fig. 6 is a schematic structural diagram of an alternative scenario of an electronic device proposed in the present application;

fig. 7 shows a schematic structural diagram of an electronic device according to yet another alternative scenario presented in the present application;

fig. 8 shows a schematic structural diagram of yet another alternative embodiment of the electronic device proposed by 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, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the 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.

It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings. The embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be understood that "system", "apparatus", "unit" and/or "module" as used herein is a method for distinguishing different components, elements, parts or assemblies at different levels. However, other words may be substituted by other expressions if they accomplish the same purpose.

As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements. An element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

In the description of the embodiments herein, "/" means "or" unless otherwise specified, for example, a/B may mean a or B; "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two. The terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Aiming at the technical problems provided by the background technology, the structure of the traditional optical system can be simplified, and the surface type of a plane screen in the traditional image source is changed to obtain a larger exit pupil, so that the imaging quality of the whole optical system is improved. The exit pupil of the optical system may be an image formed by an aperture stop of the optical system in an image space of the optical system, and a position (indicated by an exit pupil distance) and a diameter (indicated by an exit pupil diameter) of the exit pupil respectively correspond to a position and a caliber of the exit beam.

Specifically, this application provides an off-axis reflection optical system, and it adopts curved surface image source to replace traditional plane image source, and this curved surface image source can be become by optical scanning subassembly and curved surface screen, corresponds the lens subassembly in to traditional image source, and this kind of optical scanning subassembly has simplified the component structure, has reduced the volume, and for traditional plane screen, the curved surface screen has bigger degree of freedom, cooperates the free curved surface speculum like this, can greatly improve whole optical system's imaging quality. With regard to the specific constituent structure and the functional implementation of the off-axis reflective optical system proposed in the present application, reference may be made to, but not limited to, the following description of the corresponding portions of the embodiments.

Referring to fig. 1, a schematic structural diagram of an alternative embodiment of an off-axis reflective optical system proposed in the present application is shown, where the optical system may be applied to an electronic device, such as an AR (Augmented Reality) device, a VR (Virtual Reality) device, and the like, and the present application does not limit a product type of the electronic device, as shown in fig. 1, and the optical system proposed in the present embodiment may include, but is not limited to: a curved image source 100 and a free-form surface mirror 200, wherein:

the curved image source 100 may include a light scanning assembly 110 and a curved screen 120, and the light scanning assembly 110 may scan a light beam to form a curved image on the curved screen 120.

The free-form surface mirror 200 may reflect the light beam generated from the curved image to obtain a parallel light beam capable of generating a target exit pupil, so that the parallel light beam may be captured into the user's eye to view the image content of the curved image when the user wears the electronic device.

In some embodiments, the outer contour of the free-form surface mirror 200 may be a circle, a rectangle, an irregular shape, etc., and the shape and structure of the free-form surface mirror 200 are not limited in this application and may be determined according to the type of electronic device and the mechanical structure for mounting the free-form surface mirror 200.

In some embodiments, the mirror material of the free-form surface mirror 200 proposed in the present application may be polished aluminum or aluminum alloy, etc., and the reflective surface may be plated with a high reflective film having a first reflectivity, which may be a value higher than 95%.

Referring to the optical system shown in fig. 1, the free-form surface reflector 200 in the off-axis reflective optical system proposed in this embodiment may be obliquely placed between the curved screen and the viewing port of the user's eye, and the normal line of the free-form surface reflector 200 may respectively form a first included angle with the normal lines of the curved screen 120 and the viewing port of the user's eye, and the present application does not limit the specific value of the first included angle, and may be determined by factors such as the spatial structure in the electronic device in which the optical system is installed, for example, the first included angle may be an included angle between 30 ° and 60 °, but is not limited to 30 ° to 60 °.

In summary, the optical scanning assembly in the curved image source of the present embodiment can form a curved image on the curved screen in a beam scanning manner, and compared with a conventional screen image, the aperture of the generated beam is larger, and further, the beam is reflected by the free-form surface mirror, so that a larger exit pupil can be obtained, and the imaging quality of the whole off-axis reflective optical system is improved.

In practical applications of the present application, the curved screen mentioned in the above embodiments may have a first curvature radius, and the free-form surface reflector may have a second curvature radius, where the present application does not limit specific values of the first curvature radius and the second curvature radius, and in some embodiments, the second curvature radius may be larger than the first curvature radius, so that the light beam emitted from the curved screen can be completely absorbed into the free-form surface reflector, thereby ensuring that a complete image with a large field angle is displayed to a user wearing the electronic device.

In some embodiments, the curved screen 120 may be a curved microlens array to achieve the diffusion of the light beam generated from the curved image, and the specific structure of the curved microlens array is not limited in this application.

In practical application, the micro lens array is an array composed of lenses with micron-sized clear aperture and relief depth, and has the basic functions of focusing, imaging and the like of the traditional lens, and the characteristics of small unit size and high integration level, so that the micro lens array can complete the functions which cannot be completed by the traditional optical element, and can form a plurality of novel optical systems. The curved surface lens array provided by this embodiment may have a curved surface shape by changing a positional relationship between the plurality of lens assemblies to enlarge a numerical aperture of the light source and generate a larger aperture of the light beam.

In some embodiments, the curved screen 120 may have a first curved surface type (i.e., the curved microlens array may have a first curved surface type), and the free-form surface reflector 200 may have a second curved surface type.

Under the condition that the position relationship between the curved screen 120 and the free-form surface reflector 200 in the display component of the electronic device is determined, the light beam is emitted to the curved screen 120 and the free-form surface reflector 200 with different curved surface types and different curvature radiuses, and the formed light paths are often different, so that the reverse light path design can be adopted in the application, and the parameters such as the curved surface type, the curvature radius and the like of the curved screen 120 and the free-form surface reflector 200 are determined according to preset optimization conditions. In combination with the above analysis, the preset optimization condition may include that the free-form surface mirror 200 emits a parallel light beam capable of generating the target exit pupil, and the present application does not describe in detail the specific optimization and adjustment process of the parameters such as the first curved surface type, the second curved surface type, the first curvature radius, the second curvature radius, and the like.

In practical application of this embodiment, as shown in fig. 1, according to a reverse light path design idea, parallel light beams are emitted from eyes of a user wearing an electronic device, and after being reflected by the free-form surface mirror 200, the parallel light beams can be focused on the curved surface screen, so that in this embodiment, parameters such as the first curved surface type, the second curved surface type, the first curvature radius, the second curvature radius, and the like are used as variables, and the variables are optimized in combination with image quality until the obtained image quality meets requirements, so that the structural formation of the curved surface screen is determined according to the first curved surface type and the first curvature radius obtained by the final optimization, and the structural shape of the free-form surface mirror is determined according to the second curved surface type and the second curvature radius obtained by the final optimization.

Therefore, the curved screen determined by the method is a spherical structure with the first curvature radius, the spherical structure is used for replacing a planar screen in a traditional image source, and a curved image with a specific curvature radius can be obtained after light beam scanning of the optical scanning assembly.

In some embodiments, the light scanning assembly 110 may comprise a MEMS (Micro-Electro-mechanical system) Micro-mirror, which forms a curved image on the curved screen 120 by scanning a light beam.

MEMS may also be referred to as micro-electro-mechanical systems, micro-machines, etc., and refer to high-tech devices with dimensions of a few millimeters or less. The MEMS micro-mirror is a light beam control technology, the light beam scanning speed is high, the power consumption is low, the image forming speed is greatly improved, and the power consumption of the whole optical system is reduced.

In a specific implementation manner of some embodiments, as shown in fig. 2, the light scanning assembly 110 may include: the light source 111 and the MEMS Micro-electromechanical System (MEMS) Micro-mirror 112, in practical applications, a light beam emitted from the light source 111 can be reflected by the MEMS Micro-mirror 112, and a light beam scanning manner is adopted to form a curved image on the curved screen 120.

In the present application, the light beam emitted from the light source 111 described above generally has good directivity. Preferably, the light source 111 may be a laser light source, and the light beam mentioned in the above embodiments may be a laser beam.

In implementation manners of still other embodiments, referring to fig. 3, the light scanning assembly 110 proposed in the present application may further include a first mirror 113, where the first mirror 113 may be disposed between the light source 111 and the optical path formed by the MEMS micro-mirror 112, the first mirror 113 reflects the light beam emitted from the light source 111 to the MEMS micro-mirror 112, and the MEMS micro-mirror 112 reflects the light beam reflected by the first mirror 113, so as to form a curved image on the curved screen 120 by means of light beam scanning.

As can be seen, the reflecting surface of the first reflecting mirror 11 faces the light source 111 and the MEMS micro-mirror 112, and the specific position relationship between the three can be determined by observing the light path between the three and the quality of the curved image formed by the MEMS micro-mirror on the curved screen through the light beam scanning, and the specific implementation process is not described in detail in this application.

In some embodiments, referring to fig. 4, the light scanning assembly 110 proposed in the above embodiments may further include a first lens 114 disposed between the light source 111 and the first mirror 113, so that the light beam emitted by the light source 111 enters the first mirror 113 after passing through the parallel light beam generated by the first lens 114, and enters the MEMS micro-mirror 112 after being reflected.

In practical applications, the first lens 114 may be, but is not limited to, a condenser lens, which can condense the light beam emitted from the light source 111 to the reflecting surface of the first reflector 113 as much as possible to improve the imaging quality.

By combining the above analysis, the present application uses the optical scanning assembly shown in fig. 4 to replace the conventional lens assembly, thereby greatly reducing the number of optical elements such as lenses and mirrors, and the laser beam emitted by the laser source is reflected by the MEMS micro-mirror to form a curved image with a specific curvature radius on the curved screen, which is equivalent to obtaining the required curved image source. The curved micro lens array is used as a curved screen, the numerical aperture of the laser light source is expanded by utilizing the light beam diffusion function of the curved micro lens array, a larger light beam aperture is generated, then, the larger exit pupil is obtained through reflection of the free-form surface reflector, the imaging quality of the whole optical system is improved, and the image observation range of a user wearing the electronic equipment with the off-axis reflection type optical system is enlarged.

Referring to fig. 5, a schematic structural diagram of an alternative embodiment of an electronic device proposed in the present application is shown, where the electronic device may be an AR device, a VR device, or the like, and the present application does not limit a product type of the electronic device, and as shown in fig. 5, the electronic device may include:

a fixing device 310 for maintaining a relative positional relationship between a user and an electronic apparatus in a case where the user wears the electronic apparatus;

it should be understood that, for different types of electronic devices, the way in which the user wears the electronic device may be different, and the structure of the fixing device 310 of the electronic device may also be different, and the application does not limit the mechanical structure of the fixing device 310.

Taking an electronic device as an example of a head-mounted electronic device for illustration, as shown in fig. 6, the fixing device 310 may include a first fixing member 311, a second fixing member 312 and a third fixing member 313, the first fixing member 311 and the third fixing member 313 may be connected to form an annular space to be worn on the head of a user, and may intersect with the second fixing member 312 perpendicularly, as shown in fig. 6, the first fixing member 311 may surround the head of the user, the second fixing member 311 may surround the top of the head of the user, so as to prevent the electronic device from falling off from the head of the user, and further indicate a proper position for the user to wear the electronic device, and so on. The structures of the first fixing element 311 and the second fixing element 312 are not limited in the present application, fig. 6 shows an optional example of the fixing device 310, the structures of the fixing device 310 are not limited, and the fixing device can be flexibly adjusted according to actual requirements, which is not listed in the present application.

In other embodiments, if the electronic device is a glasses-type AR/VR device, as shown in fig. 7, the fixing device 310 can maintain the relative position between the electronic device and the left and right ears of the user unchanged during the period that the user wears the electronic device, and the application does not limit the specific structure of the fixing device 310 of this type of electronic device.

Optionally, the fixing device 310 may further include a connecting component such as a buckle, and the state of the fixing device may be changed by a connecting action of the connecting component, for example, the fixing device may be changed from the first state to the second state, and then changed from the second state to the first state after being worn on the head of the user.

An image collector 320 for collecting image information of an external environment;

in this embodiment, the image collector 320 may be installed on the fixing device 310, and when the user wears the electronic device, the lens of the image collector 310 may face the external environment to collect the image of the external environment, and the structure and the number of the image collectors 310 are not limited in this application.

In some embodiments, the image collector 320 may include cameras, and the present embodiment does not limit the types and the number of the cameras, such as a common RGB camera, a depth-of-field camera, a 3D structure camera, and the like, and the types and the number of the cameras may be determined according to the actual application requirements of the electronic device.

The camera can comprise a rotatable lens, so that the image acquisition range is changed by controlling the rotatable camera to acquire required image information during the period that the user wears the electronic equipment; of course, in the present application, a rotatable bracket may also be configured for the camera, so that even if the camera is configured with a fixed lens, the image capture range of the camera may be changed by controlling the rotatable bracket.

In addition, the installation position of the camera in the fixing device can be determined according to various factors such as the product type and the structural composition of the electronic equipment, the image acquisition requirement and the like, and the installation position, the installation mode and the like of the camera are not limited in the application.

A display assembly 330, the display assembly 330 may include an off-axis reflective optical system as described in the above embodiments in the fixture 310, and the display assembly 330 may have a first display surface that may be disposed toward an eye of a user wearing the electronic device, and a parallel light beam obtained by the off-axis reflective optical system may be incident on the eye of the user through the first display surface.

For the composition structure of the off-axis reflective optical system, reference may be made to the description of the corresponding parts in the above embodiments, and details are not repeated in this embodiment.

Referring to the electronic device shown in fig. 6, the display component 330 may be disposed in the third fixing member 313, and in some embodiments, the number of the off-axis reflective optical systems may be two, and the two off-axis reflective optical systems may be respectively located at two sides of a normal line of the first display surface of the display component and symmetrically arranged, as shown in fig. 8, during the period that the electronic device is worn by a user, parallel light beams output by the two off-axis reflective optical systems may be respectively incident on left and right eyes of the user to view image content of a curved image formed by the off-axis reflective optical systems.

Fig. 8 does not show other components of the optical scanning assembly except for the MEMS micro-mirror, such as the light source, the first mirror, the first lens, etc. given in the above embodiments, and the structural position relationship of these components can be referred to the description of the corresponding parts of the above embodiment of the off-axis reflective optical system.

In practical applications of this embodiment, off-axis reflective optical systems that are completely symmetric about the left and right sides may be disposed in the display module of the electronic device, that is, the structures of the off-axis reflective optical systems respectively corresponding to the left and right eye observation regions may be the same, and at this time, the whole display module may have two light sources.

Of course, in some embodiments, a light source may be disposed in the display assembly of the electronic device, in which case, the display assembly may include a free-form surface mirror disposed symmetrically on both sides of the normal of the first display surface of the display assembly, a curved surface screen disposed symmetrically and components of the light scanning assembly other than the light source, and a light source disposed in the first area corresponding to the normal of the first display surface. That is to say, the off-axis reflective optical systems respectively corresponding to the left and right eye observation regions in the electronic device may share one light source, and for the relationship between other components except for the light source in the off-axis reflective optical system and the relationship between the other components and the light source, reference may be made to the description of the corresponding parts of the embodiment of the off-axis reflective optical system, which is not repeated herein.

The position of the normal of the first display surface of the display component corresponding to the first area may be determined according to a reverse light path design idea, and reference may be specifically made to the description of the corresponding part of the above embodiment.

In addition, the above-mentioned composition structure of the display module 330 is not limited to the off-axis reflective optical system, and other devices, such as indicator lamps, etc., may be included according to practical requirements, which is not listed in this application.

And the processor 340 is used for virtually modeling the image information and displaying the virtual environment to a user through the display component.

It should be noted that, the implementation process of how to utilize the image information of the external environment to perform virtual modeling to obtain the corresponding three-dimensional virtual environment is not described in detail, and the image rendering technology may be combined to perform rendering processing on the image of the real external environment or the image of the real external environment and the virtual scene image to obtain the corresponding three-dimensional virtual environment, which is displayed in front of a user wearing the electronic device, and the like.

It should be understood that the image information received by the processor 340 may be acquired by the image acquirer 320 of the electronic device itself, or may include image information acquired by other electronic devices, and the source of the image information processed by the processor 340 is not limited in this application.

In addition, the structure of the electronic device shown in the drawings presented in the present application does not constitute a limitation to the electronic device in the embodiments of the present application, and in practical applications, more or less components than those shown in the drawings of the electronic device may be included, or some components may be combined, such as a communication interface, a memory, and various sensor assemblies, and the like, which are not listed in the present application.

In summary, in the off-axis reflective optical system in the display module in the electronic device according to this embodiment, the curved image source is used to replace the conventional planar image source, so that the aperture of the emitted light beam is increased, the desired target exit pupil can be obtained by reflection of the free-form surface reflector, and the image quality displayed by the electronic device to the user is improved.

Moreover, the curved image source is formed by the light scanning assembly and the curved screen, compared with the traditional image source which needs to be provided with a large number of lenses, reflectors, binary optical elements and the like, the structure of the optical system is simplified, the volume of the optical system is reduced, the design trend of the current portable and small electronic equipment can be met, and the off-axis reflective optical system provided by the application can be suitable for various types of electronic equipment.

Finally, the embodiments in the present specification are described in a progressive or parallel manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the electronic device disclosed in the embodiment, since it includes the off-axis reflective optical system disclosed in the embodiment, the description is simple, and in relation to the above, reference may be made to the description of the embodiment of the off-axis reflective optical system.

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