CN216285981U

CN216285981U - Optical module, optical module system, display device, head-mounted display equipment and system thereof

Info

Publication number: CN216285981U
Application number: CN202122421325.5U
Authority: CN
Inventors: 翁志彬; 来颖
Original assignee: Pimax Technology Shanghai Co ltd
Current assignee: Xiaopai Technology (Hangzhou) Co.,Ltd.; Xiaopai Technology Rizhao Co ltd
Priority date: 2021-10-08
Filing date: 2021-10-08
Publication date: 2022-04-12
Anticipated expiration: 2031-10-08

Abstract

The application provides an optical module, optical system, display device, head-mounted display equipment and display system. The optical module includes: the first wave plate and the second wave plate are positioned on one side of the transmission direction of incident light, the incident light comprises first light, the first light sequentially passes through the first wave plate and the second wave plate to form second light, and the second light is linearly polarized light; the plane polarization reflection assembly is fixed on one side of the second wave plate and used for reflecting the second light to the second wave plate to obtain third light; and the curved surface reflection assembly is used for receiving the third light and reflecting the third light to the second wave plate again to form fourth light, the fourth light is linearly polarized light with the vibration direction vertical to that of the second light, and the fourth light is transmitted to human eyes through the plane polarization reflection assembly.

Description

Optical module, optical module system, display device, head-mounted display equipment and system thereof

Technical Field

The application relates to the technical field of optics, concretely relates to optical module, optical system, display device, head-mounted display equipment and display system.

Background

With the development of technology, the field of optical display has changed with the ground. Among them, Near to Eye Display (NED) technology has achieved a very large success. The user can obtain immersive sensory experience through NED technologies such as Virtual Reality (VR), Augmented Reality (AR), and the like.

The structure and performance of the optical module directly affect the user experience of using the display device comprising the optical module. The problems of the prior art will be described with reference to the optical module shown in fig. 1 and 2.

Fig. 1 illustrates an optical module 100. The optical module 100 can be used to convert the light displayed on the display screen 101 into light incident to human eyes. The optical module comprises a first optical component 102 and a second optical component 103.

Fig. 1 shows the light path by a grey broken line, light emitted by the display screen 101 is reflected by the first optical element 102 to the second optical component 103, the second optical component 103 reflects the light back to the first optical component 102, and the first optical component 102 further transmits the light into the human eye.

It can be seen that the optical module 100 includes one or more components that can be both transmissive and reflective, and that some light is lost when light passes through these components. For example, if the reflectance of the first optical element 102 is 50% and the transmittance thereof is 50%, the residual light efficiency of the original image displayed on the display screen 101 reaching the human eye is 25% or 50%. Therefore, only a small part of light rays emitted by the display screen 101 can enter human eyes, the brightness of the light rays entering the human eyes is low, and the light energy utilization rate (light efficiency) of the optical module is low. In order to achieve the brightness acceptable to human eyes, the screen brightness needs to be adjusted to a higher level, but this causes the screen heating phenomenon to be serious, which not only wastes energy, but also reduces the life of the optical module.

In order to improve the optical efficiency of the optical module, a polarization reflection assembly and a wave plate are generally disposed. Taking the optical module 200 shown in fig. 2 as an example, the optical module 200 includes: a polarizing reflective assembly 202, a wave plate 203, and a reflective assembly 204. The wave plate 203 is generally fixed or attached to a surface of the reflective assembly 204, and in this case, the reflective assembly 204 can serve as a support for the wave plate 203. In order to achieve a better display effect, the reflection assembly 204 is generally a curved reflection assembly, and in order to achieve connection between the curved reflection assembly and the wave plate, the wave plate needs to be processed into a curved structure, or a planar wave plate needs to be attached to the surface of the curved reflection assembly. However, the curved surface wave plate has a complex processing technology, the planar wave plate is difficult to be attached to the surface of the curved surface reflection assembly, and even if the attachment is realized, the attachment effect is poor. In order to simplify the manufacturing process, the wave plate may be placed separately from the curved reflective component, but this requires an additional supporting structure for the wave plate, which results in an increase in the volume and weight of the optical module. The AR or VR display device used in the optical module is usually a head-mounted display device, and the increase in the volume and weight of the head-mounted display device will seriously affect the experience of the user.

SUMMERY OF THE UTILITY MODEL

In view of this, the present application is directed to provide an optical module, an optical system, a display device, a head-mounted display apparatus and a display system, so as to solve the problems of increased energy consumption, complicated processing process or increased volume caused by the improvement of the light efficiency of the conventional optical module.

In a first aspect, the present application provides an optical module comprising: the first wave plate and the second wave plate are positioned on one side of the transmission direction of incident light, the incident light comprises first light, the first light sequentially passes through the first wave plate and the second wave plate to form second light, and the second light is linearly polarized light; the plane polarization reflection assembly is fixed on one side of the second wave plate and used for reflecting the second light to the second wave plate to obtain third light; and the curved surface reflection assembly is used for receiving the third light and reflecting the third light to the second wave plate again to form fourth light, the fourth light is linearly polarized light with the vibration direction vertical to that of the second light, and the fourth light is transmitted to human eyes through the plane polarization reflection assembly.

As an embodiment, the first wave plate is disposed on a light-emitting side surface of the component formed by the incident light, and the second wave plate is disposed on a side surface of the plane polarization reflection component close to the incident light.

As an embodiment, the plane polarization reflection assembly includes a polarization reflection film plated on the surface of the second wave plate far away from the incident light.

As one embodiment, the plane polarization reflection assembly includes a substrate and a polarization reflection film.

In one embodiment, the polarization reflection film is configured to reflect polarized light with a vibration direction perpendicular to an incident plane and transmit polarized light with a vibration direction parallel to the incident plane, where the incident plane is a plane where a light ray incident on the polarization reflection film and a normal line of the polarization reflection film are located.

As one embodiment, the component for providing the incident light rays comprises a display screen, and the second wave plate is close to the surface of the display screen and forms an included angle alpha with the display screen, wherein the included angle alpha satisfies 35 degrees and more than or equal to 65 degrees.

As one embodiment, the first wave plate is 1/4 wave plate, and the second wave plate is 1/4 wave plate

A wave plate.

As an embodiment, the exit angle between the first light and the display screen is less than 5 °, when the first light passes through the first wave plate or the second wave plate, the first light is decomposed into light a and light B, and after the first light passes through the first wave plate and the second wave plate, the phase difference between the light a and the light B is half wavelength.

As an embodiment, the second light ray is obliquely incident on the second wave plate at an incident angle β, the incident angle β satisfies 35 ° β ≦ 55 °, and when the second light ray passes through the second wave plate, the second light ray is decomposed into a light ray a and a light ray B, and after the second light ray passes through the second wave plate twice, the phase difference between the light ray a and the light ray B is half wavelength.

As an embodiment, the curved reflective component is concave towards human eyes in vertical and horizontal directions, and the focal length f of the curved reflective component satisfies the following condition: 5mm < f <200 mm.

As an embodiment, the curved reflective element is an aspherical mirror.

As one embodiment, the curved reflective element is a transflective mirror.

In a second aspect, the present application provides an optical system, including the display screen, being located the left eye lens subassembly and the right eye lens subassembly of display screen light source one side, its characterized in that, left eye lens subassembly and right eye lens subassembly include the first aspect respectively optical module.

In a third aspect, the present application provides a display device comprising the optical system of the second aspect and a housing, the optical system being accommodated in the housing.

As one embodiment, the display device includes: VR display device and camera, the camera lens of camera faces the people's eye.

In a fourth aspect, the present application provides a head-mounted display device comprising the optical system according to the second aspect and a glasses frame, wherein the glasses frame comprises temples, and the optical system is fixed between the temples.

In a fifth aspect, the present application provides a head-mounted display device, wherein the head-mounted display device comprises the optical system according to the second aspect and a buckle member disposed therein, and the buckle member is used for fixing the optical system in front of human eyes.

In a sixth aspect, the present application provides a display system, which is a virtual reality and/or augmented reality display system, and is characterized in that the display system includes a signal input device and a head-mounted display device as in the fourth aspect or the fifth aspect, and the head-mounted display device receives a signal of the signal input device and transmits the signal to the head-mounted display device for processing.

As an embodiment, the signal input device includes a handle controller for electrically connecting with the head-mounted display device.

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

This application is through setting up first wave plate and second wave plate to it is fixed with second wave plate and plane polarization reflection subassembly, on the basis of the light efficiency that improves optical module, avoided being connected the problem that the technology is complicated that leads to with wave plate and curved surface reflection subassembly on the one hand, on the other hand also need not additionally to increase the strutting arrangement of wave plate, thereby has reduced optical module's volume, has improved user experience and has felt.

Drawings

Fig. 1 is a schematic diagram of an optical path trace of an optical module in the prior art.

Fig. 2 is a schematic diagram of an optical path trace of another optical module in the prior art.

Fig. 3 is a schematic diagram of an optical path trace of an optical structure of an optical module according to the present invention.

Fig. 4 is a schematic diagram of an optical path trace of a polarization reflection assembly in the optical module according to the present invention.

Detailed Description

This application provides an optical module to the technical problem who exists among the prior art. Fig. 3 is a block diagram of an optical module 300 according to an embodiment of the present disclosure, which includes: a first waveplate 301, a second waveplate 303, a planar polarization reflective element 304, and a curved reflective element 305.

The incident ray forming assembly 500 emits incident rays that are incident to the optical module. The incident light rays may include a first light ray L1. For convenience of description, the assembly 500 formed by incident light rays is hereinafter simply referred to as the light-emitting source 500.

Take the light source 500 as an example of a display screen. The light source 500 is used for emitting a first light L1 to display an original image. The original image may be a picture or a video. The first light L1 may be linearly polarized light. The Display may be a passive light emitting Display, such as a Liquid Crystal Display (LCD). The display screen may also be an active Light Emitting display screen, such as a Light Emitting Diode (LED) display screen. The active luminescent screen has a better luminescent effect, so the application of the active luminescent screen is wider.

In order to explain the role of the first waveplate 301 or the second waveplate 303, the principle of the waveplate will be described below.

After the light enters the wave plate, a birefringence phenomenon occurs, and the light is decomposed into two polarized lights with mutually perpendicular vibration directions, different propagation speeds and different refractive indexes, namely a light ray A and a light ray B. Ray a obeys the law of refraction and is called ordinary wave (o-ray). The light ray B is not refracted according to the angle of the law of refraction and is called extraordinary ray (e-light). The vibration direction of the o light is perpendicular to the optical axis of the wave plate, and the vibration direction of the e light is parallel to the optical axis of the wave plate. Because the o light and the e light have different characteristics, after the light passes through the wave plate, an additional optical path difference (or referred to as optical phase difference) is generated between the o light and the e light. Different wave plates can generate different additional optical path differences, for example, the wave plate capable of generating the additional optical path difference of 1/4 wavelengths for the o light and the e light is the 1/4 wave plate, and the wave plate capable of generating the additional optical path difference of 1/2 wavelengths for the o light and the e light is the 1/2 wave plate. Based on the above-mentioned characteristics of the wave plate, a variety of functions can be achieved by means of the wave plate. Taking 1/4 wave plate as an example, linearly polarized light passes through 1/4 wave plate, which can generate additional optical path difference of 1/4 wavelength, thereby forming circular or elliptical polarized light; or, circular or elliptical polarized light passes through 1/4 wave plate to generate additional optical path difference of 1/4 wavelength, so as to form linearly polarized light; alternatively, the linearly polarized light passes through the 1/4 wave plate twice, an additional optical path difference of 1/2 wavelength can be generated, and thus the linearly polarized light perpendicular to the original vibration direction is formed.

The first waveplate 301 and the second waveplate 303 are both located on the light-emitting side of the light-emitting source 500. The first light beam L1 passes through the first wave plate 301 and the second wave plate 303 in sequence to form a second light beam L2. The second light L2 is linearly polarized light, and the vibration direction is the first direction.

Continuing with the example of the light source 500 as a display screen. The first light ray L1 may exit the display screen (i.e., from the light source 500) at an angle of less than 5 °. The first wave plate 301 and the second wave plate 303 are arranged such that the phase difference between the o light and the e light is half wavelength after the first light L1 passes through the first wave plate 301 and the second wave plate 303, thereby forming a second light L2. The vibration direction (i.e., the first direction) of the second light ray L2 is perpendicular to the vibration direction of the first light ray L1.

Note that the present application does not limit the material of the first wave plate 301 or the second wave plate 303, and for example, the material may be plastic, glass, crystal, or the like.

In addition, the present application does not limit the position where the first wave plate 301 is disposed. For example, the first waveplate 301 may be separately disposed on the light-emitting side of the light-emitting source 500. Alternatively, the first wave plate 301 may be connected to the light-emitting side surface of the light source 500, for example, attached to the light-emitting side surface of the light source 500. Alternatively, the first wave plate 301 may be connected to a device disposed on the light emitting side of the light source 500, and as shown in fig. 3, the first wave plate may be attached to the surface of the lens 302. In consideration of the difficulty of attachment, the first wave plate 301 may be attached to the planar surface of the lens 302.

The plane polarization reflection assembly 304 is located at one side of the second wave plate, and is used for reflecting the second light L2 to the second wave plate 303, so as to obtain a third light L3. The plane polarization reflection assembly 304 may reflect most of the linearly polarized light with the first vibration direction (or called as the polarization direction) (the reflectivity of the linearly polarized light with the first vibration direction is greater than 50%, and may be close to 100%), and transmit most of the linearly polarized light with the first vibration direction perpendicular to the first vibration direction (the transmissivity of the linearly polarized light with the vibration direction perpendicular to the first vibration direction is greater than 50%, and may be close to 100%). Wherein the second direction may be perpendicular to the first direction. Therefore, the plane polarization reflection assembly 304 receives the second light L2 with the vibration direction being the first direction, and can reflect most of the second light L2 back to the second wave plate 303. The second light beam L2 passes through the second wave plate 303 to form a third light beam L3. The third light L3 may be circularly polarized light or elliptically polarized light.

Fig. 4 is an example of a polarizing reflective assembly 400. The polarization reflective member 400 can reflect as much as possible a light component having a polarization direction perpendicular to the incident plane (generally referred to as P light), and transmit as much as possible a light component having a polarization direction parallel to the incident plane (generally referred to as S light). The incident plane is a plane where the incident light and the surface normal are located. For such a polarizing reflective member, it may be referred to as a P-transparent S-reflective member, and may be, for example, a P-transparent S-reflective film. As shown in fig. 3, the incident light rays include P light (indicated by a double-headed arrow in fig. 4) and S light (indicated by a dot in fig. 4). The polarization reflection assembly 400 reflects most of the S light in the incident light to form a reflected light, and transmits most of the P light in the incident light to form a transmitted light. It can be seen that when the incident light includes only P light, most of the incident light will be transmitted through the polarization reflective assembly 400, i.e. the transmittance of the polarization reflective assembly 400 for P light is greater than 50%; when the incident light includes only S light, most of the incident light will be reflected by the polarization reflective member 400, i.e., the polarization reflective member 400 has a reflectivity of more than 50% for S light.

It is understood that fig. 4 is only an example of the polarization reflective assembly, and the polarization reflective assembly of the present application may be a P-transparent S-reflective film, or may be other elements.

The curved surface reflection assembly 305 is configured to receive the third light L3 and reflect the third light L3 to the second wave plate 303 again to form a fourth light L4. The fourth light L4 is linearly polarized light, and the vibration direction is the second direction. The fourth light ray L4 may be transmitted to the human eye through the plane polarization reflective assembly 304. The curved surface of the curved reflective element 305 may be concave to the human eye in both the vertical and horizontal directions. The focal length f of the curved reflective component 305 can satisfy 5mm < f <200 mm.

The curved surface structure of the curved surface reflection assembly 305 can realize the convergence effect on light rays, so that more light rays can enter human eyes by the curved surface reflection assembly 305, and the effect of improving the display brightness is achieved.

The curved reflective component 305 may perform only a reflective function, such that the optical module 300 may be used in a VR system to allow a user of the VR system to view a virtual image. The curved surface reflection assembly 305 may also be a half-transparent and half-reflective mirror, so that light rays of the external environment enter human eyes through the curved surface reflection assembly 305 and the planar half-transparent and half-reflective assembly 304, thereby realizing the fusion of the content displayed by the light source and the external environment, and further realizing the AR function.

The curved reflective component 103 can be an aspherical mirror. The aspherical mirror is lighter and thinner, the imaging effect is better, the definition and the brightness of imaging are improved, and the lightweight of an optical module is realized.

In addition to the optical components described above, the optical module 300 may further include other optical components, which is not limited in this application. For example, the optical module 300 may include a lens 302. The lens 302 may be disposed on the light exit side of the light exit source 500. The lens 302 may be a convex mirror for focusing or diffusing. For example, the convex mirror can diffuse the incident light emitted from the light source 500, so that the incident light can be more uniformly incident on the planar semi-transmissive and semi-reflective assembly 304, and the resolution of the subsequent components on the optical path for processing the light is higher, which is beneficial to improving the fineness of the picture received by human eyes.

The optical path of the optical module 300 is shown by the gray line in fig. 3. The residual light efficiency through the optical module 300 is calculated as follows.

The maximum reflectivity of the plane polarization reflection assembly 304 for the linearly polarized light with the vibration direction being the first direction is d%, and the transmittance for the linearly polarized light with the vibration direction being the second direction is e%, so that the residual light efficiency of the light rays (the original image displayed by the display screen when the light source 500 is the display screen) which are displayed by the light source 500 and reach human eyes is d% × e%. As can be seen from the above, both d% and e% are greater than 50%, and thus, d%. times.e% is greater than 25%. Taking the example of the optical module 300 applied to an AR display device, the curved reflective element 305 is a transflective mirror with a reflectivity of 50%, the residual light efficiency of the light rays emitted from the light source 500 reaching human eyes is d% × 50% × e%, and both d% and e% are greater than 50%, so that d% × 50% × e% is greater than 12.5%.

The application provides an optical module can make the light that goes out the light source demonstration reach the surplus light efficiency of people's eye department higher to can reduce the demonstration luminance of going out the light source, can also reduce optical module's energy consumption and generate heat, and then improve optical module's life-span, and reduced the energy consumption.

It should be noted that the present application is not limited to the specific structure of the plane polarization reflection assembly 304. For example, the plane polarization reflective member 304 may be a polarization reflective film, a polarization mirror, or the like. The polarizing mirror may include a substrate and a polarizing reflective film, and the polarizing reflective film may be connected to a surface of the substrate. Alternatively, the plane polarization reflection assembly 304 may be a polarization reflection film, and the polarization reflection film may be connected with other optical components, for example, the second wave plate 303. The substrate can be a transparent flat plate or a plane semi-transparent and semi-reflective mirror.

Alternatively, the polarizing reflective film may be a transflective S-reflective film. The second waveplate 303 may be disposed on a surface of the plane polarization reflection assembly 304 near the incident light. The arrangement mode may be, for example, a fixed arrangement, and the fixed arrangement may be, for example, a contact fixed or a non-contact fixed, that is, other components may be further included between the plane polarization reflection assembly 304 and the second wave plate 303.

It should be noted that the plane polarization reflection assembly 304 is fixed on one side of the second wave plate 303, so that the plane polarization reflection assembly 304 and the second wave plate 303 have a supporting relationship, for example, the plane polarization reflection assembly 304 can support the second wave plate 303. Alternatively, the second waveplate 303 may support the planar polarizing reflective assembly 304.

The application is not limited to the fixing or connecting of the second waveplate 303 to the plane polarization reflective member 304. For example, the plane polarization reflection assembly 304 includes a substrate and a polarization reflection film, the second wave plate 303 may be a hard plate or a soft plate, and the second wave plate 303 may be fixed with the plane polarization reflection film or the surface of the substrate. In this case, the plane polarization reflective member 304 may provide support for the second waveplate 303. Alternatively, the plane polarization reflection assembly 304 is a soft plate, the second wave plate 303 is a hard plate, and the plane polarization reflection assembly 304 and the second wave plate 303 may be surface-fixed. In this case, the second waveplate 303 may provide support for the planar polarizing reflective assembly 304.

It should be noted that the present application is not limited to the above-mentioned specific fixing or connecting manner, and there may be a supporting relationship between the fixed or connected components. The fixing or connecting mode can be flexibly selected according to the requirement, for example, the mode of surface attaching or evaporation coating can be adopted.

This application is fixed or link together with the plane polarization reflection assembly in second wave plate and the optical module, has avoided laminating the wave plate in the curved surface of curved surface reflection assembly, has also avoided setting up extra strutting arrangement for the wave plate. Thereby avoiding complex process steps, simplifying the structure of the optical module and reducing the volume of the optical module. When the user uses the display device comprising the optical module, better user experience can be obtained.

The incident light element may comprise a display screen. As shown in fig. 3, the surface of the second waveplate 303 close to the display screen (i.e. the light source 500) forms an included angle α with the display screen. Since the second wave plate 303 is fixedly connected to the plane polarization reflection assembly 304, the surface of the plane polarization reflection assembly 304 and the display screen also form an angle α. The size of the included angle alpha can meet the condition that the alpha is more than or equal to 35 degrees and less than or equal to 65 degrees. On one hand, the setting of α can make the curved surface reflection assembly 305 receive as much light as possible, so as to further reflect more light to the human eye, thereby improving the display brightness of the image that the human eye can see. On the other hand, this can further improve the supporting effect of the plane polarization reflection assembly 304 on the second wave plate 303, and reduce the deformation or offset of the second wave plate 303 caused by the influence of gravity.

To adapt α, the second waveplate 303 needs to be adjusted. The optical path difference generated between the o light and the e light by the wave plate is related to the distance of the light propagating in the wave plate, and when the light is vertically incident to the wave plate, the optical path difference which is consistent with the expectation can be generated. Since 35 ≦ α ≦ 65 °, the second light ray L2 is not incident perpendicularly to the second waveplate 303. Therefore, the parameters of the second waveplate 303 need to be adjusted so that the second waveplate 303 can generate a predetermined optical path difference for light. The parameter of the second waveplate 303 may be, for example, the thickness of the second waveplate 303 or other parameters related to the optical path difference. For example, the first wave plate may be 1/4 wave plate, and the second wave plate may be 1/4 wave plate

The first light ray sequentially passes through the first wave plate and the second wave plateAfter the wave plate, a second light ray can be formed, the first light ray and the second light ray are linearly polarized light, and the vibration direction of the second light ray is vertical to that of the first light ray; after the second light passes through the second wave plate twice, a fourth light can be formed, the fourth light is linearly polarized light, and the vibration direction of the fourth light is perpendicular to the vibration direction of the second light.

It should be noted that the application does not limit the angle at which the second light enters the second wave plate. For example, the second light ray may be obliquely incident on the second waveplate at an incident angle β. Optionally, the incident angle β satisfies 35 ° ≦ β ≦ 55 °, and the second wave plate is disposed such that the phase difference between the o-light and the e-light is half wavelength, i.e., π, after the second light passes through the second wave plate twice.

The application also provides an optical system. The optical system comprises a display screen, a left eyeglass component and a right eyeglass component, wherein the left eyeglass component and the right eyeglass component are positioned on one side of a light source of the display screen. The left-eye lens assembly and the right-eye lens assembly respectively comprise any one of the optical modules. The display screen is used for emitting incident light received by the optical module to form an original image. Incident light enters the left eye and the right eye of a person through the left lens assembly and the right lens assembly respectively. The left lens assembly and the right lens assembly can transmit the same image to human eyes and can also transmit different images. When the images transmitted to the human eyes by the left lens component and the right lens component are different, richer and more diverse display experiences can be provided for the user.

The application also provides a display device comprising any one of the optical modules. The display device may comprise a near-eye display device, for example may comprise a VR display device or an AR display device, or the like. For example, a display device may perform the function of AR alone, and then the display device includes an AR display device, and a display device may also perform the function of VR alone, and then the display device includes a VR display device, or a display device may perform both the functions of VR and AR, then the display device includes both VR and AR display devices.

The display device may include a housing in which the optical module is accommodated, and the housing may isolate the optical module from an external environment, thereby achieving protection of the optical module. The housing may also be used to secure the display device near the eyes of a person, for example on the head of a user, so that the user does not need to support the display device by hand during use.

Optionally, the display device may further include a camera. For example, the camera may face the human eye for human eye detection or human eye tracking. The camera can also feed back the shot image to the display device for predicting the state and the demand of the user and responding, thereby achieving the purpose of controlling the display device by using the glasses.

The application also provides a head-mounted display device, and the display device comprises any one of the optical systems and the glasses frame. The eyeglass frame comprises temples, and the optical system is fixed between the temples. Such a head-mounted display device may also be referred to as a glasses-type display device.

The application also provides a head-mounted display device, and the display device comprises any one of the optical systems and the buckle piece. The buckle hoop is used for fixing the optical system in front of the human eyes. The present application does not limit the specific structure of the buckle, and may be, for example, helmet-shaped, strap-shaped, or the like.

The present application further proposes a display system being a virtual reality and/or augmented reality (AR and/or VR) display system comprising a signal input device and a head mounted display device of any of the above. The signal input device is used for inputting signals to the head-mounted display device. The head-mounted display device receives the signal of the signal input device and transmits the signal to the head-mounted display device for processing.

Wherein, display system can realize AR's function alone, then this display system includes AR display system, and display system also can realize VR's function alone, then this display system includes VR display system, and perhaps, display system can realize VR and AR's function simultaneously, then this display system includes VR and AR display system.

The present application is not limited to a particular type of signal input device. For example, the signal input device may be a sensor, which may include: a speed sensor, an acceleration sensor, a vibration sensor, or the like, and correspondingly, the signal input to the head-mounted display device may be a sensor signal such as a speed signal, an acceleration signal, or a vibration signal. Alternatively, the signal input to the head-mounted display device may be another signal generated based on the sensor signal. In particular, the signal input device may include a handle controller for electrically connecting with the head-mounted display device. The user can realize the control of the head-mounted display device through the handle controller.

The processing mode of the head-mounted display device is not limited in the application, and for example, the processing can adjust the displayed content, the displayed parameters and the like according to the handle controller.

Optionally, the display system may be a virtual reality and/or augmented reality all-in-one machine, and the head-mounted display device is provided with an independent central processing unit. The central processor can be used for controlling the handle controller and displaying content. Based on this, the display system can independently perform calculation and processing without being connected to a PC.

Optionally, the devices may be all intelligent display devices. The intelligent display device can realize intelligent processing, for example, a neural network learning model can be operated, and the display screen can be a liquid crystal display screen or an LED display screen.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modifications, equivalents and the like that are within the spirit and principle of the present application should be included in the scope of the present application.

Claims

1. An optical module, comprising:

the light source comprises a first wave plate and a second wave plate, wherein the first wave plate and the second wave plate are positioned on one side of the transmission direction of incident light, the incident light comprises first light, the first light sequentially passes through the first wave plate and the second wave plate to form second light, and the second light is linearly polarized light;

the plane polarization reflection assembly is fixed on one side of the second wave plate and used for reflecting the second light to the second wave plate to obtain third light;

and the curved surface reflection assembly is used for receiving the third light and reflecting the third light to the second wave plate again to form fourth light, the fourth light is linearly polarized light with a vibration direction vertical to that of the second light, and the fourth light passes through the plane polarization reflection assembly and is transmitted to human eyes.

2. The optical module of claim 1,

the first wave plate is arranged on the surface of one side of the light source of the element for providing the incident light, and the second wave plate is arranged on the surface of one side of the plane polarization reflection assembly, which is close to the incident light.

3. The optical module of claim 2,

the plane polarization reflection assembly comprises a polarization reflection film, and the polarization reflection film is plated on the surface of the second wave plate far away from the incident light.

4. The optical module of claim 3,

the plane polarization reflection assembly comprises a substrate and a polarization reflection film.

5. The optical module of claim 4,

the polarization reflection film is used for reflecting polarized light with the vibration direction perpendicular to the incident plane and transmitting the polarized light with the vibration direction parallel to the incident plane, wherein the incident plane is a plane where light rays incident on the polarization reflection film and the normal line of the polarization reflection film are located.

6. The optical module of claim 1,

the element for providing the incident light comprises a display screen, and the second wave plate is close to the surface of the display screen and forms an included angle alpha with the display screen, wherein the included angle alpha is more than or equal to 35 degrees and less than or equal to 65 degrees.

7. The optical module of claim 6,

the first wave plate is 1/4 wave plate, and the second wave plate is

A wave plate.

8. The optical module of claim 7,

the first light and the display screen emergent angle are smaller than 5 degrees, the first light passes through the first wave plate or during the second wave plate, the first light is decomposed into light A and light B, the first light passes through the first wave plate and the second wave plate, and the phase difference between the light A and the light B is half wavelength.

9. The optical module of claim 7,

the second light is obliquely incident on the second wave plate at an incident angle beta, the incident angle beta is larger than or equal to 35 degrees and smaller than or equal to 55 degrees, when the second light passes through the second wave plate, the second light is decomposed into light A and light B, and after the second light passes through the second wave plate twice, the phase difference between the light A and the light B is half wavelength.

10. The optical module of claim 1,

the curved surface reflection assembly is concave to human eyes in the vertical direction and the horizontal direction, and the focal length f of the curved surface reflection assembly meets the following conditions: 5mm < f <200 mm.

11. The optical module of claim 1,

the curved surface reflection assembly is an aspherical mirror.

12. The optical module of claim 1,

the curved surface reflection assembly is a semi-transparent semi-reflecting mirror.

13. An optical system comprising a display screen, a left-eye lens assembly and a right-eye lens assembly on a light source side of the display screen, wherein the left-eye lens assembly and the right-eye lens assembly each comprise an optical module according to any one of claims 1 to 12.

14. A display device, characterized in that the display device comprises the optical system of claim 13 and a housing;

wherein the optical system is housed within the housing.

15. The display device of claim 14, wherein the display device comprises a VR display device and a camera, and wherein a lens of the camera faces a human eye.

16. A head-mounted display device, characterized in that the head-mounted display device comprises the optical system of claim 13 and an eyeglass frame; wherein the eyeglass frame comprises temples, and the optical system is fixed between the temples.

17. A head-mounted display device comprising the optical system of claim 13 disposed therein and a clasp for securing the optical system in front of a human eye.

18. A display system, the display system being a virtual reality and/or augmented reality display system, wherein the display system comprises a signal input device and the head-mounted display device according to any one of claims 16-17, the head-mounted display device receiving signals from the signal input device and transmitting the signals to the head-mounted display device for processing.

19. The display system of claim 18,

the signal input device comprises a handle controller which is electrically connected with the head-mounted display device.

20. The display system of claim 19, wherein the display system comprises a virtual and/or augmented reality display all-in-one machine, and the head-mounted display device is provided with a separate central processor for controlling the handle controller and displaying content.