WO2020119320A1

WO2020119320A1 - Display light machine, method thereof, and near-eye display device

Info

Publication number: WO2020119320A1
Application number: PCT/CN2019/114928
Authority: WO
Inventors: 郝希应; 陈杭; 胡增新
Original assignee: 舜宇光学（浙江）研究院有限公司
Priority date: 2018-12-13
Filing date: 2019-11-01
Publication date: 2020-06-18

Abstract

A display light machine, a method thereof, and a near-eye display device. The display light machine comprises a display unit, a relay assembly, and a perspective reflecting assembly. The display unit is configured to transmit image light having a predetermined spectrum. The relay assembly is disposed on a transmitting path of the display unit. The perspective reflecting assembly is disposed on a reflecting path of the relay assembly, and a reflecting spectrum of the perspective reflecting assembly is substantially consistent with the predetermined spectrum, so that image light reflected by the relay assembly is reflected back to the relay assembly to reduce escape of the image light through the perspective reflecting assembly.

Description

Display optical machine, method and near-eye display device

Technical field

The invention relates to the technical field of augmented reality, in particular to a display optical machine and a manufacturing method thereof, an anti-aliasing display optical machine and a method thereof, and a near-eye display device.

Background technique

Augmented Reality (AugmentedReality, AR for short), also known as augmented reality or mixed reality, is a technology that superimposes virtual objects into the real environment and interacts with them. By projecting images of virtual objects and real environments into the eyes of users, Allow users to get a virtual and real experience. At present, near-eye display devices capable of realizing augmented reality, such as AR glasses, appear on the market.

As shown in FIG. 1, the conventional display light machine 10P generally includes a display unit 11P, a half mirror half lens 12P and a curved mirror 13P. Image light emitted through the display unit 11P passes through the half mirror half lens 12P and the curved surface The reflection mirror 13P reflects into human eyes. Generally, the curved mirror 13P is a partial mirror, that is, it reflects and transmits light according to a certain ratio (such as reflecting 50% of the light and transmitting 50% of the light), so that the curved mirror 13P can not only reflect part of the image light back In the human eye, the person sees the corresponding image, and the light of the real environment is allowed to pass through the curved mirror 13P to enter the human eye, so that the person sees the real environment, thereby achieving the purpose of augmented reality.

However, since the curved mirror 13P of the existing display light machine 10P can only reflect a part of the image light, the other part of the image light will pass through the curved mirror 13P to escape from the front of the display light machine 10P , So that the escaped image light can enter other people's eyes, so that others can also see the displayed image. As shown in FIG. 2, when the user wears the near-eye display device 1P equipped with the display light machine 10P, since part of the image light will escape from the front of the display light machine 10P of the near-eye display device 1P, other people The displayed image can be seen from the front of the near-eye display device 1P, that is, other people can clearly see the image viewed by the user from the outside of the near-eye display device 1P, which is not conducive to the privacy protection of the user. In particular, when the near-eye display device 1P is used in a dim or dark environment, the escaped image light will cause the near-eye display device 1P to appear conspicuous due to light emission, which will embarrass the user himself, and may even cause Dislike of others.

In addition, only half of the image light emitted by the display unit 11P (such as the image source unit) is reflected by the half mirror half lens 12P to the curved mirror 13P, and the other half of the image light will pass through the half mirror The half lens 12P escapes; then, the curved mirror 13P can only reflect nearly half of the image light to the half mirror half lens 12P, and the other half of the image light escapes through the curved mirror 13P; finally, through the curved surface Only half of the image light reflected by the mirror 13P can reach the human eye through the half mirror lens 12P, and the other half of the image light will escape due to the reflection of the half mirror lens 12P. In other words, only 1/8 of the image light emitted through the display unit 11P can enter the human eye, and the remaining 7/8 light is wasted, which greatly reduces the light utilization rate of the image light, that is, the existing The light utilization efficiency of the image light of the display light machine 10P is extremely low, only about 12.5%, which results in insufficient intensity of the image light reaching the human eye, so that the ambient light or interference light entering the human eye will seriously reduce the enhanced display image Contrast, thereby reducing the user's enhanced display experience.

In addition, for the existing display optical machine 10P, the ambient light from below the half mirror half 12P will reach the half mirror half 12P as interference light, and part of the interference light will be reflected to the half mirror half 12P In human eyes, the user will see the virtual image of the object located under the half mirror half 12P, causing visual interference, thereby seriously affecting the user's perception experience.

Of course, as shown in FIG. 26, the existing display optical machine 10P' may also include a display unit 11P', a polarizing beam splitter 12P' curved mirror 13P' and a quarter wave plate 14P', where the polarizing beam splitter 12P' is located On the light-emitting side of the display unit 11P', the curved mirror 13P' is located on the reflective side of the polarization beam splitter 12P', and the quarter-wave plate 14P' is located between the polarization beam splitter 12P' and the curved mirror 13P'. In this way, when the display unit 11P' emits image light, the P-polarized light in the image light escapes through the polarization beam splitter 12P', and the S-polarized light in the image light is reflected to the curved mirror 13P', Then it is reflected back to the polarization beam splitter 12P' by the curved mirror 13P', so that the S polarized light passes through the 1/4 wave plate 14P' twice to be converted into P polarized light, and then passes through the polarization beam splitter 12P 'Into the human eye. At the same time, ambient light can sequentially pass through the curved mirror 13P', the 1/4 wave plate 14P', and the polarization beam splitter 12P' to be incident into the human eye, so that the user can pass through the existing display light machine 10P' get an augmented reality experience.

However, for the existing display light machine 10P', the ambient light from below the existing display light machine 10P' will reach the polarization beam splitter 12P' as interference light, although the P* polarized light in the interference light It can pass through the polarizing beam splitter 12P', but the polarizing beam splitter 12P' will reflect the S* polarized light in the interference light to the human eye, so that the user will see the existing display light machine 10P' below Virtual images (ie, artifacts) of objects cause visual interference, which seriously affects the user's perception experience.

Summary of the invention

An object of the present invention is to provide a display optical machine, a method thereof, and a near-eye display device, which can realize enhanced display while protecting user privacy.

Another object of the present invention is to provide a display light machine, a method thereof, and a near-eye display device, which can reduce the amount of escape of image light and help improve the light utilization rate of image light.

Another object of the present invention is to provide a display optical machine, a method thereof, and a near-eye display device, which can reduce leakage of displayed images to protect user privacy.

Another object of the present invention is to provide a display light machine, a method thereof and a near-eye display device, wherein, in an embodiment of the present invention, the reflection spectrum of the reflective film system of the display light machine and the display light machine The light emission spectrum of the display unit remains basically the same to minimize the escape of the image light emitted by the display unit.

Another object of the present invention is to provide a display optical machine, a method thereof, and a near-eye display device, wherein, in an embodiment of the present invention, without changing the structure of the existing display optical machine, only the setting is required The reflective film system can achieve the effect of protecting privacy.

Another object of the present invention is to provide a display light machine, a method thereof, and a near-eye display device, wherein in order to achieve the above-mentioned object, it is not necessary to use expensive materials or complicated structures in the present invention. Therefore, the present invention successfully and effectively provides a solution that not only provides a display optical machine and its method and near-eye display device, but also increases the practicality and reliability of the display optical machine and its method and near-eye display device .

An object of the present invention is to provide a near-eye display light machine, a method thereof, and a near-eye display device, which can improve the light energy utilization rate of image light of the near-eye display light machine.

Another object of the present invention is to provide a near-eye display optical machine, a method thereof, and a near-eye display device, which help to adapt to the current trend of thinning and miniaturization of near-eye display devices.

Another object of the present invention is to provide a near-eye display optical machine, a method thereof, and a near-eye display device, wherein, in an embodiment of the present invention, the angle between the polarization beam splitting component of the near-eye display optical machine and the optical viewing axis The range is 50° to 70°, which helps to improve the overall compactness of the near-eye display optical machine.

Another object of the present invention is to provide a near-eye display optical machine, a method and a near-eye display device, wherein, in an embodiment of the present invention, the near-eye display optical machine utilizes the characteristics of polarized light through a reasonable optical design To reduce the loss of light energy of the image light, and thereby improve the utilization of light energy of the image light.

Another object of the present invention is to provide a near-eye display light machine, a method thereof, and a near-eye display device, wherein, in an embodiment of the present invention, the near-eye display light machine can reduce the amount of escape of image light and reduce The leakage of the displayed image not only helps to further improve the utilization of light energy of the image light, but also helps protect the privacy of the user.

Another object of the present invention is to provide a near-eye display optical machine, a method and a near-eye display device, wherein, in an embodiment of the present invention, the anti-interference unit of the near-eye display optical machine uses a linear polarizer to eliminate the lower part The artifact interference caused by ambient light helps to improve the user's comfortable experience.

Another object of the present invention is to provide a near-eye display optical machine, a method thereof, and a near-eye display device. In an embodiment of the present invention, the anti-interference unit of the near-eye display optical machine has a simple structure and low cost. And has a good effect of eliminating artifacts.

Another object of the present invention is to provide a near-eye display optical machine, a method thereof, and a near-eye display device, wherein in order to achieve the above-mentioned object, it is not necessary to use expensive materials or complicated structures in the present invention. Therefore, the present invention successfully and effectively provides a solution that not only provides a near-eye display optical machine and its method and near-eye display device, but also increases the practicality of the near-eye display optical machine and its method and near-eye display device. reliability.

An object of the present invention is to provide a display optical machine, a method thereof, and a near-eye display device, which can effectively prevent interference light below from being reflected into the eyes of a user to prevent visual interference.

Another object of the present invention is to provide a display optical machine, a method thereof and a near-eye display device, wherein, in an embodiment of the present invention, the relay system of the display optical machine uses a linear polarizer and 1/4 wave The combination of tablets to eliminate the interference of the ambient light below, helps to improve the user's comfort experience.

Another object of the present invention is to provide a display optical machine, a method thereof, and a near-eye display device, wherein, in an embodiment of the present invention, the protection substrate of the relay system of the display optical machine is provided with antireflection In order to protect the polarizer, the film can also prevent visual interference caused by interference light reflected by the protective substrate into the user's eyes.

Another object of the present invention is to provide a display light machine, a method thereof, and a near-eye display device, wherein, in an embodiment of the present invention, the display light machine can protect users' privacy while implementing augmented reality functions .

Another object of the present invention is to provide a display light machine, a method thereof, and a near-eye display device, wherein, in an embodiment of the present invention, the display light machine can reduce leakage of displayed images to protect the user’s privacy.

An object of the present invention is to provide an anti-artifact type display optical machine, a method thereof, and a near-eye display device, which can effectively prevent the interference light below from being reflected into the user's eyes, and help eliminate artifact interference.

Another object of the present invention is to provide an anti-aliasing type display optical machine, a method thereof and a near-eye display device, wherein, in an embodiment of the present invention, the relay system of the anti-aliasing type display optical machine adopts The combination of polarizing beam splitting element and polarizing filter element can eliminate the interference of ambient light below, which helps to improve the user's comfortable experience.

Another object of the present invention is to provide an anti-aliasing type display optical machine, a method thereof and a near-eye display device, wherein, in an embodiment of the present invention, the relay of the anti-aliasing type display optical machine The system will not reduce the utilization rate of the light energy of the image light while increasing the anti-aliasing function.

Another object of the present invention is to provide an anti-aliasing display optical machine, a method thereof and a near-eye display device, wherein, in an embodiment of the present invention, the anti-aliasing display optical machine can reduce the displayed Images leaked to protect users' privacy.

Another object of the present invention is to provide an anti-aliasing display optical machine, a method thereof and a near-eye display device, wherein, in an embodiment of the present invention, the anti-aliasing display optical machine has a reflective film The predetermined reflection spectrum and the spectrum of the image light emitted by the display unit remain substantially the same to minimize the escape of the image light emitted by the display unit.

Another object of the present invention is to provide an anti-aliasing type display optical machine, a method thereof and a near-eye display device, wherein, in an embodiment of the present invention, the relay of the anti-aliasing type display optical machine The protection substrate of the system is provided with an antireflection film, so that while protecting the linear polarizer, it can also avoid the interference of light rays caused by the protection substrate being reflected into the user's eyes and causing artifacts.

Another object of the present invention is to provide an anti-aliasing type display optical machine, a method thereof, and a near-eye display device, wherein in order to achieve the above-mentioned object, it is not necessary to use expensive materials or complicated structures in the present invention. Therefore, the present invention successfully and effectively provides a solution that not only provides an anti-aliasing display optical machine and its method and near-eye display device, but also adds the anti-aliasing display optical machine and its method and near-eye display Display the practicality and reliability of the device.

In order to achieve at least one of the above objects of the invention or other objects and advantages, the present invention provides a display light machine, including:

A display unit for emitting image light with a predetermined spectrum;

A relay component, wherein the relay component is disposed on the transmission path of the display unit; and

A see-through reflection assembly, wherein the see-through reflection assembly is disposed on a reflection path of the relay assembly, and a reflection spectrum of the see-through reflection assembly remains substantially consistent with the predetermined spectrum for use by the relay assembly The reflected image light is reflected back to the relay component to reduce the escape of the image light through the see-through reflective component.

In an embodiment of the present invention, the see-through reflection component includes a reflection film system, wherein the reflection film system is made by a film system design according to the predetermined spectrum, so that the reflection film system has the reflection spectrum.

In an embodiment of the invention, the see-through reflective assembly further includes a curved base layer, wherein the reflective film is disposed on the inner surface of the curved base layer.

In an embodiment of the invention, the see-through reflective assembly further includes a curved base layer, wherein the reflective film is disposed on the outer surface of the curved base layer.

In an embodiment of the present invention, the see-through reflective assembly further includes a protective film, wherein the protective film is disposed outside the reflective film system.

In an embodiment of the invention, the curved base layer is made of transparent material or translucent material.

In an embodiment of the invention, the curved base layer is a curved lens or a curved mirror.

In an embodiment of the present invention, the transmissive reflection component has a transmittance of 0-10% for light in the wavelength bands of 420-480 nm, 510-570 nm, and 605-660 nm, and a transmittance of light in other wavelength bands of 90- 100%.

In an embodiment of the invention, the thickness of the reflective film system is 0.05-0.15 mm.

In an embodiment of the invention, the relay component is a half-inverted half lens.

In an embodiment of the invention, the relay component is a polarization beam splitter.

In an embodiment of the present invention, the display optical machine further includes a 1/4 wave plate, wherein the 1/4 wave plate is disposed between the polarization beam splitter and the see-through reflection component .

In an embodiment of the invention, the display optical machine further includes a lens assembly, wherein the lens assembly is disposed between the display unit and the relay assembly.

According to another aspect of the present invention, the present invention also provides a display light machine, including:

A display unit for emitting image light;

A relay component, wherein the relay component is disposed on the transmission path of the display unit;

A transmissive film system, wherein the transmissive film system is disposed between the display unit and the relay assembly, and the transmissive film system has a transmissive spectrum for allowing image light having the transmissive spectrum to pass through Past; and

A see-through reflection assembly, wherein the see-through reflection assembly is provided in the reflection path of the relay assembly, and the reflection spectrum of the see-through reflection assembly is kept opposite to the transmission spectrum of the transmission film system for The image light with the transmission spectrum reflected by the relay component is reflected back to the relay component to reduce the escape of the image light through the see-through reflection component.

According to another aspect of the present invention, the present invention also provides a near-eye display device, including:

A device body; and

The display optical machine according to any one of the above, wherein the display optical machine is provided on the device body so that the near-eye display device has a function of protecting privacy.

According to another aspect of the present invention, the present invention also provides a display method of a display light machine, including the steps of:

By a relay component, reflecting image light having a predetermined spectrum emitted through a display unit to a see-through reflective component, wherein the see-through reflective component has a reflection spectrum consistent with the predetermined spectrum; and

With the see-through reflective component, the image light is reflected, so that the image light can be projected into the human eye through the relay component to display the image.

According to another aspect of the present invention, the present invention also provides a manufacturing method of a display light machine, including the steps of:

Setting a relay component in the emission path of a display unit, wherein the display unit is used to emit image light having a predetermined spectrum; and

A perspective reflection component is provided in the reflection path of the relay component, wherein the relay component is used to reflect the image light to the perspective reflection component, wherein the perspective reflection component has a basic level maintained with the predetermined spectrum A uniform reflection spectrum is used to reflect the image light.

In an embodiment of the present invention, the manufacturing method of the display optical machine further includes the steps before the step of disposing a see-through reflective component on the reflection path of the relay component:

A reflective film is disposed on a curved base layer to make the see-through reflective component, wherein the reflective film is made by film design according to the predetermined spectrum.

In an embodiment of the invention, the reflective film is plated on the surface of the curved base layer.

According to another aspect of the present invention, the present invention further provides a near-eye display optical machine, including:

An image source unit for emitting image light along the emission path;

A lens group unit, wherein the lens group unit is provided in the emission path of the image source unit for modulating the image light emitted through the image source;

A polarization beam splitting unit, wherein the polarization beam splitting unit is disposed on the emission path of the image source unit, and the lens group unit is located between the image source unit and the polarization beam splitting unit, wherein the polarization The angle between the beam splitting unit and the optical viewing axis of the near-eye display optical machine is greater than 45°, used to reflect the first polarized image light among the image light modulated by the lens group unit and transmitted through the lens The second polarized image light in the image light modulated by the group unit;

A see-through reflection unit, wherein the see-through reflection unit is provided on the reflection side of the polarization beam splitting unit, and the see-through reflection unit corresponds to the optical viewing axis of the near-eye display optical machine for passing the polarization Part or all of the first polarized image light reflected by the beam splitting unit is reflected back to the polarizing beam splitting unit and allows part of the ambient light to pass through; and

A polarization conversion unit, wherein the polarization conversion unit is disposed between the polarization beam splitting unit and the see-through reflection unit, for converting the first polarized image light into the second polarized image light after passing through twice , And then transmitted through the polarization beam splitting unit to enter the human eye.

In an embodiment of the invention, the angle between the polarization beam splitting unit and the optical viewing axis of the near-eye display optical machine is between 50° and 70°.

In an embodiment of the present invention, the polarization beam splitting unit includes a light-transmitting substrate and a polarization beam splitting film, wherein the polarization beam splitting film is disposed on the first optical surface of the light-transmitting substrate, and the The polarization beam splitting film is located between the light-transmitting substrate and the image source unit.

In an embodiment of the invention, the first optical surface of the light-transmitting substrate has a free-form surface.

In an embodiment of the present invention, the see-through reflection unit includes a curved substrate and a part of reflective film, wherein the partial reflective film is disposed on the second optical surface of the curved substrate, and the partial reflective film Located between the curved substrate and the polarization beam splitting unit.

In an embodiment of the invention, the second optical surface of the curved substrate has a free-form surface.

In an embodiment of the invention, the near-eye display optical machine further includes an anti-interference unit, wherein the anti-interference unit is located on the side of the polarization beam splitter unit 12 away from the image source unit, Prevent visual interference from interfering light from below.

In an embodiment of the present invention, the anti-interference unit includes a polarizing filter element, wherein the polarizing filter element is disposed on a side of the polarization beam splitting unit away from the image source unit, for absorbing the first Polarized light and transmits second polarized light, wherein the polarization state of the first polarized light and the polarization state of the first polarized image light remain the same, and the polarization state of the second polarized light and the polarization of the second polarized image light The state remains consistent.

In an embodiment of the invention, the polarizing filter element is a linear polarizer.

In an embodiment of the present invention, the anti-interference unit further includes a protective substrate and an antireflection film, wherein the protective substrate is located outside the polarizing filter element, so that the polarizing filter element is in the protection Between the substrate and the polarization beam splitting unit, the antireflection film is provided on the outer surface of the protective substrate.

In an embodiment of the invention, the polarization conversion unit is a 1/4 wave plate.

In an embodiment of the invention, the lens group unit includes at least one lens, wherein the surface type of each lens is one of a standard spherical surface, an aspheric surface, a free-form surface, and a diffraction surface.

In an embodiment of the present invention, the image source unit is one of LCD type, OLED type, DLP type and LCOS type micro display devices.

A device body; and

At least one near-eye display light machine according to any one of the above, wherein the near-eye display light machine is disposed on the device body to assemble a compact near-eye display device.

According to another aspect of the present invention, the present invention also provides a method for manufacturing a near-eye display light machine, including the steps of:

A lens group unit is disposed between an image source unit and a polarization beam splitting unit, and the lens group unit and the polarization beam splitting unit are both located in the emission path of the image source unit, wherein the lens group unit is used for The image light emitted via the image source is modulated, wherein the polarization beam splitting unit is used to reflect the first polarized image light in the modulated image light and transmit the second modulated light in the image light Polarized image light;

A see-through reflection unit is disposed on the reflection side of the polarization beam splitting unit to define an optical viewing axis through the see-through reflection unit and the polarization beam splitting unit, wherein the sandwich between the polarization beam splitting unit and the optical viewing axis The angle is greater than 45°, wherein the see-through reflection unit is used to reflect a part or all of the first polarized image light reflected by the polarization beam splitting unit back to the polarization beam splitting unit, and allow some of the ambient light to pass through ;as well as

A polarization conversion unit is provided between the polarization beam splitting unit and the see-through reflection unit to convert the first polarized image light into the second polarized image light after passing through the polarization conversion unit twice, and further Along the optical viewing axis, it is incident into the human eye.

In an embodiment of the invention, the manufacturing method of the near-eye display light machine further includes the steps of:

An anti-interference unit is disposed on a side of the polarization beam splitting unit away from the image source unit, wherein the anti-interference unit includes a polarization filter element for absorbing the first polarized light and transmitting the second polarized light, wherein The polarization state of the first polarized light is consistent with the polarization state of the first polarized image light; and the polarization state of the second polarized light is consistent with the polarization state of the second polarized image light.

According to another aspect of the present invention, the present invention further provides a display light machine, including:

A display unit for emitting image light;

A relay system, wherein the relay system is provided in a transmission path of the display unit, and the relay system includes:

A retroreflective element, used to reflect a part of light and transmit another part of light;

A polarization conversion element for converting the first polarized light into the first circularly polarized light to form a second circularly polarized light after being reflected by the retroreflective element, and also for converting the second circularly polarized light into the second polarized light ;as well as

A polarized light filter element for absorbing the second polarized light and transmitting the first polarized light; wherein the retroreflective element, the polarized light conversion element and the polarized light filter element are sequentially along the emission path of the display unit Arranged such that the disturbing light passes through the polarizing filter element, the polarizing conversion element and the retroreflective element in sequence; and

A see-through reflection unit, wherein the transflective unit is provided in the reflection path of the retroreflective element of the relay system, for reflecting the image light reflected through the retroreflective element back to the relay system .

In an embodiment of the invention, the polarization conversion element is a 1/4 wave plate; wherein the polarization filter element is a linear polarizer.

In an embodiment of the invention, the predetermined angle between the fast axis of the quarter-wave plate and the transmission axis of the linear polarizer is 45°.

In an embodiment of the invention, the retroreflective element is a half-reverse half lens.

In an embodiment of the present invention, the relay system further includes a protective substrate, wherein the protective substrate is located outside the polarizing filter element, so that the polarizing conversion element and the polarizing filter element are located at the Between the protection substrate and the anti-reflection element.

In an embodiment of the present invention, the relay system further includes an anti-reflection film, wherein the anti-reflection film is disposed on the outer surface of the protective substrate to reduce interference of light on the protective substrate The visual disturbance caused by the reflection of the outer surface.

In an embodiment of the present invention, the display optical machine further includes a lens unit, wherein the lens unit is disposed between the display unit and the relay system for The image light is modulated.

In an embodiment of the present invention, the see-through reflection unit is a curved mirror, which is used to shape the image light while reflecting the image light from the relay system back to the relay system .

In an embodiment of the present invention, the reflection spectrum of the see-through reflection unit keeps substantially the same as the predetermined spectrum of the image light emitted through the display unit, and is used to reflect the image light reflected through the relay system back The relay system reduces the amount of escape of the image light through the see-through reflection unit.

In an embodiment of the present invention, the see-through reflection unit includes a reflective film system and a curved base layer, wherein the reflective film system is disposed on the surface of the curved base layer, and the reflective film system is based on the predetermined The spectrum is made by a film design so that the see-through reflection unit has the reflection spectrum.

According to another aspect of the present invention, the present invention further provides a near-eye display device, including:

A device body; and

At least one of the above-mentioned display light machines, wherein the display light machine is disposed on the device body, so that the near-eye display device has a function of eliminating visual interference.

According to another aspect of the present invention, the present invention further provides a method for manufacturing a display light machine, including the steps of:

A relay system is provided in a transmission path of a display unit, wherein the relay system includes a reverse transmission element, a polarization conversion element and a polarization filter element arranged in sequence along the transmission path of the display unit, wherein The retroreflective element is used to reflect the image light emitted through the display unit, and is used to reflect the first polarized light from the polarization filter element; wherein the polarization conversion element is used to pass the first Polarized light is converted into second polarized light; the polarizing filter element is used to absorb the second polarized light and transmit the first polarized light; and

A perspective reflection unit is provided in the reflection path of the relay system, wherein the perspective reflection unit is used to reflect the image light reflected by the retroreflective element back to the relay system.

According to another aspect of the present invention, the present invention further provides a visual interference cancellation method for a display optical machine, including the steps of:

A polarizing filter element absorbs the second polarized light in the interference light and transmits the first polarized light in the interference light;

Converting the first polarized light from the polarizing filter element into first circular polarized light by a polarizing conversion element;

By a retroreflective element, reflecting the first circularly polarized light converted by the polarization conversion element to form a second circularly polarized light reflected back to the polarization conversion element;

Converting the second circularly polarized light reflected back from the retroreflective element into the second polarized light by the polarization conversion element; and

The polarization filter element absorbs the second polarized light converted by the polarization conversion element to eliminate visual interference caused by the interference light.

In order to achieve at least one of the above objects of the invention or other objects and advantages, the present invention provides an anti-aliasing type display optical machine, including

A display unit for emitting image light;

A lens group unit for modulating the image light emitted through the display unit;

A see-through reflective unit; and

A relay system, wherein the relay system includes:

A polarization beam splitting element, wherein the incident side of the polarization beam splitting element corresponds to the lens group unit, and the reflection side of the polarization beam splitting element corresponds to the see-through reflection unit, wherein the polarization beam splitting element is used for reflection to be modulated After the image light rays having the first polarization state, and transmitting the modulated light rays having the second polarization state in the image light;

A polarization conversion element, wherein the polarization conversion element is disposed between the polarization splitting element and the see-through reflection unit, wherein the see-through reflection unit is used to reflect the light reflected by the polarization splitting element with the first polarization The light of the state is reflected back to the polarization beam splitting element to pass through the polarization conversion element twice, wherein the polarization conversion element is used to convert the light with the first polarization state passing through twice into the second Polarized light; and

A polarizing filter element, wherein the polarizing filter element is disposed on the transmission side of the polarization beam splitter element, for absorbing the light with the first polarization state and transmitting the light with the second polarization state, so that the interference light The light with the first polarization state can be absorbed by the polarization filter element, and the light with the second polarization state in the interference light can sequentially pass through the polarization filter element and the polarization beam splitting element.

In an embodiment of the present invention, the polarizing beam splitting element includes a transparent substrate and a polarizing beam splitting film, wherein the polarizing beam splitting film is disposed on the upper surface of the transparent substrate, and the polarizing beam splitting The film is located between the light-transmitting substrate and the lens group unit.

In an embodiment of the invention, the polarization conversion element is a 1/4 wave plate.

In an embodiment of the present invention, the see-through reflective unit includes a curved substrate and a part of reflective film, wherein the partial reflective film is disposed on the inner surface of the curved substrate, and the partial reflective film is located on the Between the curved substrate and the polarization conversion element.

In an embodiment of the present invention, the relay system further includes a protective substrate, wherein the protective substrate is located outside the polarizing filter element, so that the polarizing filter element is between the protective substrate and the polarization Between splitting elements.

In an embodiment of the invention, the relay system further includes an antireflection film, wherein the antireflection film is disposed on the outer surface of the protective substrate.

In an embodiment of the present invention, the display unit is one of LCD type, OLED type, DLP type and LCOS type micro display devices.

A device body; and

At least one anti-artifact display optical machine according to any one of the above, wherein the anti-artifact display optical machine is provided on the device body to be assembled into a near-eye display device having an anti-artifact function.

According to another aspect of the present invention, the present invention further provides a method for manufacturing an anti-artifact display optical machine, including the steps of:

A polarization conversion element and a polarization filter element are respectively provided on the reflection side and the transmission side of a polarization beam splitting element to form a relay system, wherein the polarization beam splitting element is used to reflect light with a first polarization state and transmit Light with a second polarization state, wherein the polarization filter element is used to absorb the light with the first polarization state and transmit the light with the second polarization state;

Sequentially placing a display unit and a lens group unit on the incident side of the polarization conversion element of the relay system so that the lens group unit is located between the display unit and the polarization conversion element; and

A perspective reflection unit is provided on the reflection side of the polarization conversion element of the relay system, and the polarization conversion element is positioned between the polarization splitting element and the perspective reflection unit to form the Artifact display optical machine.

In an embodiment of the invention, the manufacturing method of the anti-aliasing display optical machine further includes the steps of:

Providing a protective substrate outside the polarizing filter element, so that the polarizing filter element is located between the protective substrate and the polarizing beam splitting element; and

An antireflection film is provided on the outer side of the protective substrate, so that the protective substrate is located between the antireflection film and the polarizing filter element.

According to another aspect of the present invention, the present invention further provides an anti-aliasing method for an anti-artifact display optical machine, including the steps of:

By a polarizing filter element of the anti-aliasing type display optical machine, absorbing the light having the first polarization state among the disturbing rays and transmitting the light having the second polarization state among the disturbing rays; and

A polarization beam splitter element on the transmission side of the polarization filter element transmits the light having the second polarization state among the interference rays transmitted through the polarization filter element to eliminate the reflection of the interference light rays Artifacts in the eyes of the user.

Through the understanding of the following description and drawings, further objects and advantages of the present invention will be fully realized.

These and other objects, features and advantages of the present invention are fully reflected in the following detailed description, drawings and claims.

BRIEF DESCRIPTION

FIG. 1 shows a schematic structural diagram of a prior art display optical machine.

FIG. 2 shows an example of a prior art near-eye display device equipped with the display light machine.

3 is a schematic structural diagram of a display optical machine according to an embodiment of the present invention.

FIG. 4 shows an example of a predetermined spectrum of image light emitted by the display unit of the display light machine according to the above-described embodiment of the present invention.

FIG. 5 shows an example of the reflection spectrum of the see-through reflection component of the display light machine according to the above-described embodiment of the present invention.

FIG. 6 shows a first modified embodiment of the display light machine according to the above-mentioned embodiment of the present invention.

FIG. 7 shows a second modified embodiment of the display light machine according to the above-described embodiment of the present invention.

FIG. 8 shows a third modified embodiment of the display light machine according to the above-mentioned embodiment of the present invention.

FIG. 9 shows an example of the transmission spectrum of the transmission film system of the display optical machine according to the above-described fourth modified embodiment of the present invention.

FIG. 10 shows an example of a near-eye display device according to an embodiment of the present invention.

11 is a schematic flowchart of a display method of a display optical machine according to an embodiment of the present invention.

12 is a schematic flowchart of a method for manufacturing a display optical machine according to an embodiment of the present invention.

13 is a schematic structural diagram of a near-eye display optical machine according to a first embodiment of the present invention.

FIG. 14 shows a schematic diagram of the optical path of the near-eye display optical machine according to the above-described first embodiment of the present invention.

15 is a schematic structural diagram of a near-eye display optical machine according to a second embodiment of the present invention.

FIG. 16 shows a partially enlarged schematic view of the near-eye display optical machine according to the second embodiment of the present invention.

FIG. 17 shows an example of a near-eye display device according to an embodiment of the present invention.

18 is a schematic flowchart of a method for manufacturing a near-eye display optical machine according to an embodiment of the present invention.

FIG. 19 is a schematic structural diagram of a display optical machine according to an embodiment of the present invention.

FIG. 20 shows a schematic diagram of the principle of eliminating interference light by the display optical machine according to the above embodiment of the present invention.

FIG. 21 shows an exploded schematic diagram of the relay system of the display optical machine according to the above embodiment of the present invention.

FIG. 22 shows a modified embodiment of the display light machine according to the above-mentioned embodiment of the present invention.

FIG. 23 shows an example of a near-eye display device according to an embodiment of the present invention.

24 is a schematic flowchart of a method for manufacturing a display optical machine according to an embodiment of the invention.

FIG. 25 is a schematic flowchart of a visual interference cancellation method for a display optical machine according to an embodiment of the present invention.

FIG. 26 shows a schematic structural diagram of a conventional display optical machine.

FIG. 27 is a schematic structural diagram of an anti-artifact display optical machine according to an embodiment of the present invention.

FIG. 28 shows a partially enlarged schematic diagram of the relay system of the anti-aliasing type display optical machine according to the above embodiment of the present invention.

FIG. 29 shows an exploded schematic view of the relay system of the anti-aliasing type display optical machine according to the above embodiment of the present invention.

FIG. 30 shows a modified embodiment of the anti-aliasing type display optical machine according to the above embodiment of the present invention.

FIG. 31 shows an example of a near-eye display device according to an embodiment of the present invention.

FIG. 32 is a schematic flowchart of a method for manufacturing an anti-aliasing display optical machine according to an embodiment of the present invention.

33 is a schematic flowchart of an anti-aliasing method for an anti-artifact display optical machine according to an embodiment of the present invention.

detailed description

The following description is used to disclose the present invention to enable those skilled in the art to implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious modifications. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalent solutions, and other technical solutions without departing from the spirit and scope of the present invention.

Those skilled in the art should understand that in the disclosure of the present invention, the terms "portrait", "horizontal", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and The description is simplified, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore the above terms should not be construed as limiting the present invention.

In the present invention, the term "a" in the claims and the specification should be understood as "one or more", that is, in one embodiment, the number of an element may be one, and in other embodiments, the number of the element Can be multiple. Unless it is explicitly indicated in the disclosure of the present invention that the number of the element is only one, the term “one” cannot be understood as unique or single, and the term “one” cannot be understood as a limitation on the number.

In the description of the present invention, it should be understood that “first”, “second”, etc. are for descriptive purposes only, and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through a medium. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the description of this specification, the description referring to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means specific features described in conjunction with the embodiment or examples , Structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, without contradicting each other, those skilled in the art may combine and combine different embodiments or examples and features of the different embodiments or examples described in this specification.

In recent years, with the rapid development of augmented reality technology, near-eye display devices capable of implementing augmented reality have become more and more popular and used by people. However, due to the limitation of the structure of the display optical machine in the existing near-eye display device, part of the image light inevitably escapes from the front of the existing display optical machine, resulting in others being able to The image viewed by the user is clearly seen from the outside, and the privacy of the user cannot be protected. In addition, since nearly half of the image light escapes from the front of the display light machine and is wasted, the light utilization rate of the image light of the display light machine of the near-eye display device is very low, resulting in the existing display light machine. The quality of the displayed image is poor, and it cannot meet people's demand for viewing high-quality images.

In order to solve the above problems, referring to FIGS. 3 to 5, the present invention provides a new display light machine, which can greatly reduce the escape of image light from the front of the display light machine, so that the outside can not see The image displayed by the display optical machine is described to achieve the purpose of protecting privacy. Specifically, as shown in FIG. 3, an embodiment of the present invention provides a display optical machine 10, which includes a display unit 11, a relay assembly 12, and a see-through reflection assembly 13. The display unit 11 is used to emit image light having a predetermined spectrum. The relay component 12 is provided on the transmission path of the display unit 11. The see-through reflection component 13 is provided in the reflection path of the relay component 12, and the reflection spectrum of the see-through reflection component 13 is substantially consistent with the predetermined spectrum of the image light, and is used to pass the relay component 12 The reflected image light reflects back to the relay assembly 12 and allows ambient light to pass through the see-through reflective assembly 13 to enter the relay assembly 12, so that the image light and the ambient light can pass through The relay component 12 is shot into the human eye, so that the human eye can simultaneously view the image to be displayed and the real environment, so as to achieve the purpose of augmented reality. It can be understood that, in this embodiment of the present invention, the error between the reflection spectrum and the predetermined spectrum within 20% can be regarded as that the reflection spectrum and the predetermined spectrum remain substantially consistent.

It is worth noting that, because the reflection spectrum of the see-through reflection component 13 and the predetermined spectrum of the image light emitted by the display unit 11 remain substantially the same, so that the see-through reflection component 13 reflects only light having the predetermined spectrum, And allow light of other spectrum (such as ambient light with unpredetermined spectrum) to pass through. Therefore, when the image light is reflected by the relay assembly 12 to the see-through reflection assembly 13, most of the image light will be reflected back to the relay assembly 12 by the see-through reflection assembly 13 to block The image light passes through the see-through reflection component 13 to reduce the escape of the image light, so that people cannot view the displayed image from the outside of the display light machine 10 to protect the privacy of the user. At the same time, since the ambient light in the real environment usually has a full spectrum, only ambient light with the predetermined spectrum cannot pass through the see-through reflection component 13, while ambient light with other spectrums can pass through the perspective The reflection component 13, that is, a part of the ambient light that has the same spectrum as the image light cannot be transmitted through the perspective reflection component 13 because it is reflected by the perspective reflection component 13, while other ambient light can The projection and reflection component 13 passes through the relay component 12 to enter the human eye smoothly, so that the human eye can see the real environment.

In this way, since most of the image light is reflected into the human eye by the see-through reflection component 13, the light utilization rate of the image light of the display light machine 10 is greatly improved, and therefore, the user can see a high-quality image . In addition, since the predetermined spectrum occupies only a small part of the full spectrum, most of the ambient light can pass through the projection and reflection component 13 to enter the human eye, so that the user can see through the display light machine 10 To a clear, real environment. In other words, the see-through reflection component 13 can not only improve the light utilization rate of the image light, but also improve the contrast between the displayed image and the image of the real environment, so as to enhance the user's viewing experience.

In this embodiment of the present invention, the image light emitted by the display unit 11 of the display light machine 10 is usually synthesized by three colors of red, green, and blue, that is, the predetermined spectrum of the image light Including three colors of red, green and blue. Correspondingly, the reflection spectrum of the see-through reflection component 13 is substantially consistent with the predetermined spectrum, that is to say, the reflection spectrum of the see-through reflection component 13 also includes the spectra of the three colors of red, green and blue .

It is worth mentioning that although FIGS. 3 to 9 and the following description take the predetermined spectrum of the image light including the spectra of three colors of red, green, and blue as an example, the characteristics of the display optical machine 10 of the present invention are explained. And advantages, those skilled in the art can understand that the predetermined spectra disclosed in FIGS. 3 to 9 and the following description are only examples, and do not constitute a limitation on the content and scope of the present invention, for example, In other examples of the display light machine 10, the predetermined spectrum of the image light may also include spectrums of other colors such as the spectrum of two colors of red and blue, or the spectrum of three colors of red, yellow and blue, as long as the perspective reflection is ensured It is sufficient that the reflection spectrum of the component 13 and the predetermined spectrum of the image light are substantially the same, which will not be repeated in the present invention.

Exemplarily, FIG. 4 shows an example of the predetermined spectrum of the image light according to the present invention, wherein the image light includes blue light with a wavelength band of 420-480 nm, green light with a wavelength band of 510-570 nm, and a wavelength band of Red light of 605～660nm. Correspondingly, the see-through reflective component 13 has the reflection spectrum (as shown in FIG. 5 ), wherein the see-through reflective component 13 is directed to blue light in the wavelength band of 420-480 nm, green light in the wavelength band of 510-570 nm, and wavelength band 605 The transmittance of red light at -660 nm is 0 to 10%, and the transmittance of light in other wavelength bands is 90 to 100%.

In this way, when the image light emitted by the display unit 11 strikes the see-through reflective component 13 via the relay component 12, the see-through reflective component 13 reflects most of the image light back to the relay component 12 However, only a small part of the image light can escape through the see-through reflective component 13, so that others cannot see the image light from outside the see-through reflective component 13, which can effectively protect the privacy of the user. At the same time, although ambient light in the real environment with wavelength bands of 420 to 480 nm, 510 to 570 nm, and 605 to 660 nm is reflected by the see-through reflective component 13 and cannot pass through the see-through reflective component 13, but other Ambient light in the wavelength band can pass through the see-through reflection component 13 to be received by human eyes, so that the user can clearly see the real environment through the display light machine 10.

In this embodiment of the present invention, as shown in FIG. 3, the see-through reflective component 13 includes a reflective film system 131 and a curved base layer 132, wherein the reflective film system 131 is based on the predetermined spectrum of the image light Made by film design, so that the reflection spectrum of the reflective film system 131 is the same as the predetermined spectrum of the image light; the reflective film system 131 is disposed on the curved base layer 132 to make the reflection The film system 131 has a curved shape, thereby forming the see-through reflection component 13 with a curved structure, so that the see-through reflection component 13 can modulate the image light while reflecting the image light, so as to improve the Displays the quality of the image displayed by the optical machine.

Specifically, the curved base layer 132 may be made of a transparent material, such as glass, plastic, resin, polymer materials, and other transparent materials, to allow light to pass through the curved base layer 132, which helps to avoid the curved base layer 132 Blocks ambient light from passing through the see-through reflective component 13. Of course, in other examples of the present invention, the curved base layer 132 may also be made of translucent materials, such as glass, plastic, resin, polymer materials, and other translucent materials, to allow light to partially pass through the curved base layer 132, which can appropriately reduce the ambient light from passing through the see-through reflection component 13 to meet different scene requirements.

Exemplarily, the curved base layer 132 may be implemented as a curved lens, but the reflective film 131 is attached to the inner surface 1321 of the curved base layer 132 so that the shape of the reflective film 131 The shape of the inner surface 1321 of the curved base layer 132 remains substantially the same to form the reflective film system 131 having a curved shape. In this way, when the image light is incident on the see-through reflection component 13 via the relay component 12, the image light first reaches the reflective film system 131 to be reflected back to the middle by the reflective film system 131 Following the component 12, there is no need to pass through the curved base layer 132 first, to avoid the curved base layer 132 absorbing the image light and reducing the light energy of the image light.

It is worth noting that, in other examples of the present invention, the curved base layer 132 can also be implemented as a curved mirror, which can reflect a part of light and allow another part of light to pass through. In this way, there is no need to change the original structure of the display optical machine of the prior art, and only the reflective film system 131 needs to be provided on the curved mirror to enable the display optical machine to have a privacy protection function.

In addition, since the reflective film system 131 is attached to the inner surface 1321 of the curved base layer 132, the curved base layer 132 naturally acts as a protective barrier for the reflective film system 131 to prevent other objects from contacting The reflective film system 131 helps to protect the reflective film system 131 from damage, so as to extend the service life of the reflective film system 131.

In particular, in an example of the present invention, the reflective film system 131 may be plated on the inner surface 1321 of the curved base layer 132, which helps to strengthen the relationship between the reflective film system 131 and the curved base layer 132 The bonding strength prevents the reflective film 131 from falling off the curved base layer 132. In addition, since the reflective film system 131 is plated on the inner surface 1321 of the curved base layer 132, and the smoothness of the inner surface 1321 of the curved base layer 132 is high, the reflective film system 131 can It is in close contact with the inner surface 1321 of the curved base layer 132 to ensure that the reflective film system 131 has a high smoothness, which helps to improve the modulation effect of the reflective film system 131 on the image light.

Further, in this embodiment of the present invention, the thickness of the reflective film system 131 is preferably implemented as 0.05 to 0.15 mm, that is, the reflective film system 131 does not increase the display light machine 10 The overall size and weight are particularly suitable for the current trend of miniaturization and thinness.

In this embodiment of the present invention, as shown in FIG. 3, the relay assembly 12 of the display optical machine 10 may be, but not limited to, implemented as a half mirror lens 121 for reflecting a part of light and transmitting another Part of the light. In this way, when the image light strikes the half mirror lens 121, a part of the image light is reflected by the half mirror lens 121 to the see-through reflection component 13, and another part of the image light is The half mirror lens 121 can be transmitted through. For example, the half-reflective lens 121 may be, but not limited to, a lens that is coated with a half-reflective film, which is used to allow half of the light to pass through and reflect the other half of the light.

It is worth noting that, compared with the prior art, the light utilization rate of the image light of the display light machine 10 according to this embodiment of the present invention is greatly improved, which helps to improve the quality of the displayed image. Exemplarily, in the prior art, the image light that can finally reach the human eye through the display light machine 10 only accounts for 1/8 of the image light emitted by the display unit 11P (that is, the display of the prior art The light utilization rate of the image light of the optical machine 10P is 12.5%); and in this embodiment of the present invention, the image light that can finally reach the human eye through the display optical machine 10 accounts for nearly the light emitted by the display unit 11P 1/4 of the image light (that is, the light utilization rate of the image light of the display optical machine 10 of this embodiment of the present invention is 25%).

It is worth mentioning that, as shown in FIG. 3, the display optical machine 10 may further include a lens assembly 14, wherein the lens assembly 14 is disposed between the display unit 11 and the relay assembly 12, After the image light emitted by the display unit 11 passes through the lens assembly 14 to be modulated by the lens assembly 14, it then enters the relay assembly 12 to be reflected by the relay assembly 12 to the Perspective reflection assembly 13. It can be understood that providing the lens assembly 14 between the display unit 11 and the relay assembly 12 can improve the imaging quality of the image light.

FIG. 6 shows a first modified embodiment of the display light machine 10 according to the above example of the present invention, wherein the reflective film system 131 of the see-through reflection assembly 13 of the display light machine 10 is provided On the outer surface 1322 of the curved base layer 132, the image light reflected by the relay component 12 first passes through the curved base layer 132, and then is reflected back to the curved base layer 132 by the reflective film system 131, Furthermore, the relay component 12 reaches the eyes of the person so as to view the corresponding image.

Further, in this first modified embodiment of the present invention, as shown in FIG. 6, the see-through reflection assembly 13 of the display optical machine 10 further includes a protective film 133, wherein the protective film 133 is provided on The outside of the reflective film system 131 is used to protect the reflective film system 131 to prevent the reflective film system 131 from being scratched or damaged. It can be understood that the protective film 133 may be implemented as a transparent film, but may also be implemented as other types of protective films such as an ultraviolet protection film, a radiation protection film, and the like.

FIG. 7 shows a second modified embodiment of the display optical machine 10 according to the above embodiment of the present invention, wherein the relay assembly 12 of the display optical machine 10 is implemented as a polarization beam splitter 122 , Used to allow P polarized light to pass through and reflect S polarized light. In this way, when the image light is directed to the polarization beam splitter 122, the S polarized light (that is, the image light with an S polarization state) in the image light is reflected by the polarization beam splitter 122 to the perspective The reflective component 13, and the P-polarized light (that is, the image light with a P-polarized state) among the image rays passes through the polarization beam splitter 122. For example, the polarizing beam splitter 122 may be, but not limited to, a lens implemented with a polarizing beam splitting film (ie, PBS film), which is used to allow P polarized light to pass through and reflect S polarized light .

It is worth noting that, in this second modified embodiment of the present invention, in order to ensure that the image light reflected by the see-through reflective component 13 passes through the polarizing beam splitter 122 smoothly, the see-through reflective component 13 and the polarization beam splitter 122 change the polarization state of the image light, so that the image light having the S polarization state reflected by the polarization beam splitter 122 is converted into the image light having the P polarization state.

Exemplarily, as shown in FIG. 7, the display optical machine 10 may further include a 1/4 wave plate 15, wherein the 1/4 wave plate 15 is disposed on the polarization beam splitter 122 and the perspective Between the reflection components 13, the image light with the S polarization state reflected by the polarization beam splitter 122 first passes through the 1/4 wave plate and is converted into the image light with the circular polarization state (ie, circularly polarized light) Then, the image light with circular polarization state is reflected by the see-through reflection component 13 to pass through the 1/4 wave plate again and is converted into image light with P polarization state, after which the light with P polarization state The light of the image will pass through the polarization beam splitter 122 for receiving by the human eye, so that the user can view the corresponding image. In other words, since the quarter-wave plate 15 is provided between the polarization beam splitter 122 and the see-through reflection assembly 13, the image with the S polarization state reflected by the polarization beam splitter 122 The light will be reflected by the see-through reflection component 13 to pass through the 1/4 wave plate 15 twice, and converted into image light with P polarization state, so that the image light can smoothly pass through the polarization beam splitter 122 is seen by reaching the human eye.

It is worth mentioning that, compared with the above examples of the present invention, the light utilization rate of the image light of the display light machine 10 of the second modified embodiment of the present invention is further improved. Specifically, in the second modified embodiment of the present invention, the image light that can finally reach the human eye through the display light machine 10 accounts for almost half of the image light emitted by the display unit 11 (that is, the The light utilization rate of the image light of the display light machine 10 of the second modified embodiment has reached 50%), which is nearly one more than the light utilization rate of the image light of the display light machine 10 according to the above-mentioned embodiment of the present invention. Times, which helps to further improve the quality of the image displayed by the display light machine 10.

FIG. 8 shows a third modified embodiment of the display light machine 10 according to the above example of the present invention, wherein the display light machine 10 further includes a transmission film system 17, wherein the transmission film system 17 is It is provided between the display unit 11 and the relay assembly 12, and the transmission spectrum of the transmission film system 17 remains opposite to the reflection spectrum of the reflection film system 131 in the see-through reflection component 13 (inverse ) Is used to allow the transmission of image light with the transmission spectrum and block the transmission of image light with other spectrum. In this way, the image light emitted by the display unit 11 will have the transmission spectrum after passing through the transmission film system 17, that is, the image light transmitted through the transmission film system 17 will have the transmission spectrum. Since the transmission spectrum and the reflection spectrum remain opposite (opposite), the image light transmitted through the transmission film system 17 also has the reflection spectrum, so that the image light transmitted through the transmission film system 17 can It is totally reflected by the see-through reflection component 13 to avoid the escape of image light and effectively protect the privacy of the user.

Exemplarily, the transmissive film system 17 is attached to the emission surface of the display unit 11, and the transmissive film system 17 has a transmission spectrum as shown in FIG. 9, and the see-through reflective component 13 has a 5 shows the reflection spectrum. Since the transmission spectrum and the reflection spectrum are exactly opposite, the image light that can pass through the transmission film system 17 can be exactly reflected by the reflection film system 131 of the see-through reflection component 13 in order to minimize The escape of image light.

In this way, due to the presence of the transmission film system 17, the display unit 11 does not need to emit image light having the predetermined spectrum. That is to say, the display unit 11 can emit image light with a full spectrum or other continuous spectrum to process the image light through the transmission film system 17 to allow image light with the transmission spectrum to pass through, Thereby, the reflection film system 131 of the see-through reflection component 13 reflects the image light with the transmission spectrum into the human eye to prevent the image light from escaping from the front of the display optical machine 10 , And then achieve the effect of protecting privacy.

According to another aspect of the present invention, as shown in FIG. 10, the present invention further provides a near-eye display device equipped with a display light machine to reduce the escape of image light from the front of the near-eye display device and help protect Privacy security of users using the near-eye display device. Exemplarily, as shown in FIG. 10, the near-eye display device 1 may include the display light machine 10 and a device body 20, wherein the display light machine 10 is disposed on the device body 20 so that the The near-eye display device 1 has a function of protecting privacy. In this way, when the user wears the near-eye display device 1 for an augmented reality experience, image light will not escape from the front of the display optical machine 10 of the near-eye display device 1, so that others cannot get out of the near-eye The image viewed by the user is viewed outside the display device 1.

It is worth noting that the device body 20 may be, but not limited to, implemented as a glasses body, so that the near-eye display device 1 is implemented as AR glasses with a privacy protection function, which helps protect user privacy. It can be understood that, in other examples of the present invention, the near-eye display device 1 may also be implemented as other types of AR devices such as AR helmets.

According to another aspect of the present invention, the present invention further provides a display method of a display light machine. Specifically, as shown in FIG. 11, the display method of the display optical machine 10 includes the steps of:

S310: By a relay component 12, the image light having a predetermined spectrum emitted through a display unit 11 is reflected to a see-through reflective component 13, wherein the see-through reflective component 13 has a reflection spectrum that is substantially consistent with the predetermined spectrum ;with

S320: Reflect the image light through the see-through reflection component 13, so that the image light can be projected into the human eye through the relay component 12 to display an image.

According to another aspect of the present invention, the present invention further provides a manufacturing method of a display light machine. Specifically, as shown in FIG. 12, the manufacturing method of the display light machine 10 includes the steps of:

S410: Set a relay component 12 on the emission path of a display unit 11, wherein the display unit 11 is used to emit image light having a predetermined spectrum; and

S420: Set a perspective reflection component 13 on the reflection path of the relay component 12, wherein the relay component 12 is used to reflect the image light to the perspective reflection component 13, wherein the perspective reflection component 13 has A reflection spectrum substantially consistent with the predetermined spectrum is used to reflect the image light.

It is worth noting that in an example of the present invention, before the step S420, the manufacturing method of the display optical machine 10 further includes steps:

A reflective film system 131 is disposed on a curved base layer 132 to make the see-through reflective component 13, wherein the reflective film system 131 is made by film system design according to the predetermined spectrum.

Preferably, in an example of the present invention, the reflective film system 131 is plated on the surface of the curved base layer 132.

It is worth mentioning that in recent years, with the rapid development of augmented reality technology, near-eye display devices capable of implementing augmented reality have become more and more popular and used by people. However, due to the limitation of the structure of the display light machine in the existing near-eye display device, the light energy utilization rate of the existing display light machine for image light is extremely low (usually about 12.5%), and the existing The large size of the display light machine not only results in poor image quality displayed by the existing display light machine, but also does not conform to the current trend of miniaturization and thinning of head-mounted display devices.

In order to solve the above problems, referring to FIGS. 13 and 14, a first embodiment of the present invention provides a new near-eye display optical machine, which not only can greatly improve the light energy utilization rate of image light, but also It helps to make the structure of the near-eye display light machine compact. Specifically, as shown in FIG. 13, the near-eye display light machine 10A includes an image source unit 11A, a polarization beam splitter unit 12A, a see-through reflection unit 13A, a polarization conversion unit 14A, and a lens group unit 15A.

The image source unit 11A has an emission path 110A for emitting image light 1100A along the emission path 110A. The lens group unit 15A is provided in the emission path 110A of the image source unit 11A, and is used to modulate the image light 1100A emitted via the image source unit 11A.

The polarization beam splitting unit 12A is disposed on the emission path 110A of the image source unit 11A, and is used to reflect the first polarized image light 1101A and transmit the second polarized image light 1102A. The polarization beam splitting unit 12A and the image source unit 11A are located on both sides of the lens group unit 15A (that is, the lens group unit 15A is located between the polarization beam splitting unit 12A and the image source unit 11A), And the angle θ between the polarizing beam splitting unit 12A and the optical viewing axis 100A of the near-eye display optical machine 10A is greater than 45°, so that the polarizing beam splitting unit 12A is used to reflect the light modulated by the lens group unit 15A The first polarized image light 1101A in the image light 1100A, and transmits the second polarized image light 1102A in the image light 1100A modulated by the lens group unit 15A.

The see-through reflection unit 13A is provided on the reflection side of the polarization beam splitter unit 12A, and the see-through reflection unit 13A corresponds to the optical viewing axis 100A of the near-eye display optical machine 10A for Part or all of the first polarized image light 1101A reflected by the beam splitting unit 12A is reflected back to the polarizing beam splitting unit 12A, and a part of ambient light is allowed to pass through to propagate to the polarizing beam splitting unit 12A. The polarization conversion unit 14A is disposed between the polarization beam splitting unit 12A and the see-through reflection unit 13A, and is used to convert the first polarized image light 1101A into the polarization conversion unit 14A after passing through the polarization conversion unit 14A twice The second polarized image ray 1102A.

In this way, the second polarized image light 1102A converted by the polarization conversion unit 14A and the ambient light passing through the see-through reflection unit 13A will first pass through the polarization splitting unit 12A and then enter the human eye to be Viewing, so that the user can simultaneously see the virtual image corresponding to the image light 1100A and the real image corresponding to the ambient light by using the near-eye display light machine 10A to achieve an augmented reality experience. It can be understood that the optical viewing axis 100A of the near-eye display optical machine 10A may be a main viewing axis defined jointly by the polarization beam splitting unit 12A and the see-through reflecting unit 13A, so that the user may follow the optical viewing axis 100A can not only see the image light emitted by the image source unit 11A, but also see the external ambient light, so as to obtain an augmented reality experience that integrates virtual and real. It can be understood that the see-through reflection unit 13A can be optimally adjusted according to the specific system design.

In other words, it is precisely because the second polarized image light 1102A converted by the polarization conversion unit 14A can pass through the polarization splitting unit 12A, and there is no loss due to the reflection of the polarization splitting unit 12A, so there is It helps to improve the light energy utilization ratio of the near-eye display optical machine 10A to the image light. For example, when the see-through reflection unit 13A of the near-eye display optical machine 10A is a partial mirror (ie, reflects 50% of light and transmits 50% of light), the image light only reaches the polarization for the first time The splitting unit 12A and the see-through reflection unit 13A respectively lose half, that is, the near-eye display optical machine 10A has a light energy utilization rate of 25% for image light, which is higher than the conventional display optical machine 10P for image light. The utilization rate of light energy has doubled. At the same time, since the angle θ between the polarization beam splitting unit 12A and the optical viewing axis 100A of the near-eye display optical machine 10A is greater than 45°, the eye-relief of the near-eye display optical machine 10A (i.e. The distance between the eye points, such as the distance between the lens and the forehead, is increased, so that users who are near-sighted or far-sighted can increase the adapter to improve the user's wearing experience and comfort. In addition, this configuration also contributes to the design adjustment of the entire system, making the near-eye display optical machine 10A more compact than existing optical machines, and suitable for meeting the current trend of miniaturization and thinning.

Preferably, as shown in FIG. 14, the included angle θ between the polarization beam splitting unit 12A and the optical viewing axis 100A of the near-eye display optical machine 10A is between 50° and 70°, that is, 50°≦θ ≤70°.

It is worth noting that in the present invention, the first polarized image ray 1101A can be implemented as polarized light having a first polarization state, and the second polarized image ray 1102A can be implemented as a second polarization state Polarized light, wherein the polarization direction of the first polarized image ray 1101A is preferably perpendicular to the polarization direction of the second polarized image ray 1102A. For example, the first polarized image ray 1101A may be implemented as S-polarized light or P-polarized light, but not limited to, the second polarized image ray 1102A may be implemented as P-polarized light or S-polarized light.

In addition, in this first embodiment of the present invention, as shown in FIGS. 13 and 14, the polarization conversion unit 14A may be, but not limited to, implemented as a first 1/4 wave plate 141A for The first or second polarized

image light rays

1101A, 1102A passing through the first quarter wave plate 141A are converted into the second or first polarized image light rays 1102A, 1101A. That is, the first 1/4 wave plate 141A is disposed between the polarization beam splitting unit 12A and the see-through reflection unit 13A, so that the first polarized image light reflected through the polarization beam splitting unit 12A 1101A first passes through the first quarter wave plate 141A for the first time to be converted into the first circularly polarized light, and after being reflected by the see-through reflection unit 13A to be converted into the second circularly polarized light, then passes through the second time The first 1/4 wave plate 141A is converted into the second polarized image light 1102A, so that the first polarized image light 1101A is converted into all the light after passing through the first 1/4 wave plate 141A twice The second polarized image light 1102A, so that most of the reflected image light can pass through the polarization beam splitting unit 12A to enter the human eye, which helps to improve the image light of the near-eye display optical machine 10A Light energy utilization.

It is worth mentioning that, as shown in FIG. 14, the polarization beam splitting unit 12A of the near-eye display optical machine 10A of the first embodiment of the present invention may include a light-transmitting substrate 121A and a polarization beam splitting film 122A, The transparent substrate 121A has a first optical surface 120A, and the first optical surface 120A of the transparent substrate 121A faces the image source unit 11A (that is, the first optical surface 120A is The upper surface of the light-transmitting substrate 121A), wherein the polarizing beam splitting film 122A is disposed on the first optical surface 120A of the light-transmitting substrate 121A, so that the polarizing beam splitting film 122A is located on the light-transmitting base Between the sheet 121A and the image source unit 11A, for reflecting the first polarized image light 1101A in the image light 1100A.

In particular, the polarization beam splitting film 122A may be, but not limited to, attached or plated on the first optical surface 120A of the light-transmitting substrate 121A. It can be understood that the light-transmitting substrate 121A may be, but not limited to, made of a light-transmitting material such as optical plastic or optical glass, etc., to ensure that light can pass through the light-transmitting substrate 121A.

Preferably, the shape of the first optical surface 120A of the light-transmitting substrate 121A of the polarization beam splitting unit 12A may be, but not limited to, implemented as a free-form surface, so that image light or ambient light can be split in the polarization beam splitting The unit 12A is shaped when reflecting or transmitting, which helps to improve the imaging quality of the near-eye display optical machine 10A.

Similarly, as shown in FIG. 14, the see-through reflection unit 13A of the near-eye display optical machine 10A of the first embodiment of the present invention may include a curved substrate 131A and a part of the reflective film 132A, wherein the curved substrate The sheet 131A has a second optical surface 130A, and the second optical surface 130A of the curved substrate 131A faces the polarization beam splitter unit 12A (ie, the second optical surface 130A is inside the curved substrate 131A Surface), wherein the partially reflective film 132A is disposed on the second optical surface 130A of the curved substrate 131A, so that the partially reflective film 132A is located between the polarization splitting unit 12A and the curved substrate 131A In the meantime, it is used to reflect the first polarized image light 1101A so that the first polarized image light 1101A passes through the first quarter wave plate 141A twice to be converted into the second polarized image light 1102A.

In particular, the partially reflective film 132A may be, but not limited to, attached or plated on the second optical surface 130A of the curved substrate 131A. It can be understood that the curved substrate 131A may be made of a light-transmitting material such as optical plastic or optical glass to ensure that ambient light can pass through the see-through reflection unit 13A.

Preferably, the surface shape of the second optical surface 130A of the curved substrate 131A of the see-through reflection unit 13A may also be implemented as a free-form surface, so that image light and ambient light can be reflected in the see-through The unit 13A is shaped when the second optical surface 130A is reflected or transmitted.

It is worth noting that, in other examples of the present invention, the first optical surface 130 of the curved substrate 131A may also face the opposite direction of the polarization beam splitter unit 12A (that is, the second optical surface 130A is The outer surface of the curved substrate 131A), so that the curved substrate 131A is located between the partial reflection film 132A and the polarization beam splitter unit 12A, so that image light will first pass through the curved substrate 131A, and then It is emitted by the partial reflection film 132A to pass through the curved substrate 131A again to reach the polarization splitting unit 12A.

According to the above-described first embodiment of the present invention, as shown in FIGS. 13 and 14, the lens group unit 15A of the near-eye display optical machine 10A may include, but is not limited to, at least one lens 151A, wherein each of the lenses 151A The surface type of may be, but not limited to, implemented as a standard spherical surface, aspherical surface, free-form surface or diffraction surface for modulating and shaping the image light 1100A from the image source unit 11A. In other words, the surface type of the at least one lens 151A may be, but not limited to, one or more selected from the group consisting of a standard spherical surface, aspherical surface, free-form surface, and diffraction surface. It can be understood that the free-form surface mentioned in the present invention may be, but not limited to, implemented as an XY polynomial free-form surface, a Zernike polynomial free-form surface, or a toric surface.

It is worth mentioning that, in the above-mentioned first embodiment of the present invention, the image source unit 11A may be, but not limited to, implemented as one of LCD, OLED, DLP, and LCOS type micro display devices for providing The image light 1100A is described. In particular, when the image source unit 11A is implemented as an LCOS type micro display device, the LCOS type micro display device can emit image light having a specific polarization state so as to cooperate with the polarization beam splitting unit 12A so that The image light emitted by the image source unit 11A is not lost at the polarization beam splitter unit 12A, which helps to further improve the light energy utilization rate of the image light by the near-eye display optical machine 10A.

It can be understood that the image source unit 11A of the near-eye display optical machine 10A is implemented as an LCOS type micro display device for emitting the first polarized image light ray 1101A along the emission path 110A. Most of the first polarized image light rays 1101A emitted by the LCOS type micro display device are reflected by the polarizing beam splitting unit 12A to the see-through reflecting unit 13A without being transmitted through the polarizing beam splitting unit 12A Loss occurs, so that the light energy utilization rate of the image light by the near-eye display optical machine 10A can be greatly improved. In other words, the image light is only lost at the see-through reflection unit 13A due to transmission, and no loss is caused at the polarization splitting unit 12A due to reflection or transmission, so that the near-eye display optical machine 10A emits light to the image light The energy utilization rate is close to 50%.

However, it is precisely because the image light will be transmitted at the see-through reflection unit 13A, that is, the image light will escape from the front of the near-eye display optical machine 10A, so this will not only cause loss of light energy of the image light, making all The near-eye display optical machine 10A has a low light energy utilization rate for image light and cannot provide high-quality images; and it also allows others to see the image being viewed by the user from outside the near-eye display optical machine 10A. Protect user privacy.

Therefore, in order to solve these problems, some embodiments of the present invention provide a near-eye display light machine, the image source unit of the near-eye display light machine is used to emit image light having a predetermined spectrum, and the near-eye display light The see-through reflection unit of the camera includes a reflective film system for reflecting the predetermined spectrum, thereby greatly reducing the escape of image light from the front of the near-eye display optical machine, so that the outside cannot see the near-eye display optical machine The displayed image can achieve the purpose of improving the utilization rate of light energy and protecting privacy.

It is worth noting that in these embodiments of the present invention, for a detailed description and various modifications of the see-through reflection unit of the near-eye display light machine, reference may be made to the patent application number 201811523682.9, which the applicant has applied for, and the name is " A Chinese invention patent for a display light machine and its manufacturing method and near-eye display device, which will not be repeated in the present invention.

It is worth mentioning that, due to the structure of the near-eye display optical machine 10A of the first embodiment of the present invention, the ambient light (hereinafter referred to as interference light) below the near-eye display optical machine 10A will inevitably be inevitably It will be reflected into the human eye by the polarization beam splitter unit 12A, causing the user to see the virtual image of the object under the near-eye display optical machine 10A while viewing the scene in front of the near-eye display optical machine 10A, thereby causing vision Interference (ie, artifact interference). Therefore, in order to solve the above-mentioned problems, as shown in FIGS. 15 and 16, the second embodiment of the present invention provides a near-eye display optical machine 10A', which can effectively prevent the disturbing light below from being reflected into the user's eyes to prevent Visual disturbances have occurred. Specifically, as shown in FIG. 15, the near-eye display optical machine 10A′ according to the second embodiment of the present invention differs from the above-described first embodiment of the present invention in that the near-eye display The optical machine 10A' further includes an anti-interference unit 16A', wherein the anti-interference unit 16A' is located on the side of the polarization beam splitter unit 12A away from the image source unit 11A, and is used to prevent from the near-eye display optical machine The interference light 100A' below 10A' produces visual interference.

More specifically, as shown in FIGS. 15 and 16, the anti-interference unit 16A′ includes a polarization filter element 161A′, wherein the polarization filter element 161A′ is disposed on the polarization beam splitter unit 12A away from the image One side of the source unit 11A is used to absorb the first polarized light 101A and transmit the second polarized light 102A, wherein the first polarized light 101A is implemented as polarized light having a first polarization state, the second polarized light 102A is implemented as polarized light having a second polarization state. In other words, in the present invention, the polarization state of the first polarized light 101A is consistent with the polarization state of the first polarized image ray 1101A; and the polarization state of the second polarized light 102A and the second polarized image The polarization state of the light 1102A remains the same (for example, the first polarized light 101A and the first polarized image light 1101A have the same polarization state, and the second polarized light 102A and the second polarized image light 1102A have the same polarization state) . For example, in an example of the present invention, both the first polarized light 101A and the first polarized image ray 1101A are implemented as polarized light with an S-polarized state (abbreviated as S-polarized light); the second polarized light Both 102A and the second polarized image ray 1102A are implemented as polarized light having a P polarization state (referred to as P polarized light for short).

Therefore, when the interference light from below the near-eye display optical machine 10A' passes through the polarization filter element 161A' of the anti-interference unit 16A', first, the interference light 100A is absorbed by the polarization filter element 161A' The first polarized light 101A in', and transmits the second polarized light 102A in the interference light 100A', so that the interference light 100A' is filtered into the second polarized light 102A from unpolarized light; second, through The second polarized light 102A passing through the polarization filter element 161A' propagates upward to the polarization beam splitter unit 12A to escape through the polarization beam splitter unit 12A without being reflected into human eyes, thereby preventing The interference light 100A' from below the near-eye display optical machine 10A' has the purpose of visual interference.

It can be understood that, since the polarization beam splitting unit 12A is used to reflect polarized light having a first polarization state and transmit polarized light having a second polarization state, the second light transmitted through the polarization filter element 161A′ The polarized light 102A will only pass through the polarization splitting unit 12A, and will not be reflected by the polarization splitting unit 12A. In addition, since the polarizing filter element 161A' allows the second polarized light 102A to pass, that is, the polarized light having the second polarization state is allowed to pass, the image light and the ambient light propagating along the optical viewing axis are After passing through the polarization beam splitting unit 12A, it must be able to pass through the polarizing filter element 161A' to propagate into the human eye, so that the anti-interference unit 16A' plays an anti-artifact effect, and will not affect all The original effects of the near-eye display optical machine 10A' (such as image contrast, light energy utilization, etc.) help greatly improve the user's comfortable experience.

Exemplarily, in this embodiment of the present invention, the polarizing filter element 161A' may be, but not limited to, implemented as a linear polarizer to allow only the second polarized light to pass through and absorb the first polarized light. Preferably, the polarizing filter element 161A' is implemented as a P polarizing plate for allowing only P polarized light to pass through and absorb S polarized light, so as to interact with the polarizing beam splitting film (such as PBS film, reflect S polarized light, and transmit P polarized light) to match.

Further, as shown in FIG. 16, the anti-interference unit 16A′ may further include a protective substrate 162A′, wherein the protective substrate 162A′ is located outside the polarizing filter element 161A′, so that the polarizing filter element 161A' is located between the protection substrate 162A' and the polarization beam splitting unit 12A to protect and support the polarization filter element 161A' through the protection substrate 162A'. It can be understood that the protective substrate 162A' may be, but not limited to, made of a light-transmitting material such as glass, transparent plastic, etc. to allow light to pass through the protective substrate 162A'.

Preferably, as shown in FIG. 16, the anti-interference unit 16A′ may further include an antireflection film 163A′, wherein the antireflection film 163A′ is disposed on the outer surface of the protective substrate 162A′ for reducing The reflection of the disturbing light 100A' on the outer surface of the protective substrate 162A' helps prevent visual interference. It can be understood that the antireflection film 163A′ may be, but not limited to, plated on the outer surface of the protective substrate 162A′. For example, in other examples of the present invention, the antireflection film 163A' may be directly attached to the outer surface of the protective substrate 162A'.

It is worth noting that, in the second embodiment of the present invention, in addition to the difference in the above-mentioned structure, other structures of the near-eye display optical machine 10A' are different from the near-eye according to the first embodiment of the present invention The structure of the display light machine 10A is the same, and the near-eye display light machine 10A′ also has similar or the same modified embodiments as the various modified embodiments of the near-eye display light machine 10A of the first embodiment, here No longer.

According to another aspect of the present invention, the present invention further provides a near-eye display device equipped with a near-eye display optical machine. Exemplarily, as shown in FIG. 17, the near-eye display device 1A may include the above-mentioned at least one near-eye display light machine 10A (10A′) and a device body 20A, wherein the near-eye display light machine 10A (10A′) is provided The device main body 20A is assembled into the compact near-eye display device 1A, which makes the near-eye display device small in size and light in weight, which helps to meet the current trend of miniaturization and thinning.

It is worth noting that the device body 20A can be implemented as, but not limited to, a glasses body, so that the near-eye display device 1A is implemented as AR glasses, which helps to improve the user experience. It can be understood that, in other examples of the present invention, the near-eye display device 1A may also be implemented as other types of AR devices such as AR helmets.

According to another aspect of the present invention, the present invention further provides a method for manufacturing a near-eye display light machine. Specifically, as shown in FIG. 18, the manufacturing method of the near-eye display optical machine 10A includes the steps of:

S310A: setting a lens group unit 15A between an image source unit 11A and a polarization beam splitting unit 12A, and the lens group unit 15A and the polarization beam splitting unit 12A are both located in the emission path of the image source unit 11A, wherein The lens group unit 15A is used to modulate the image light 1100A emitted through the image source unit 11A, wherein the polarization beam splitting unit 12A is used to reflect the first polarized image light in the modulated image light 1100A 1101A, and transmits the second polarized image light 1102A in the modulated image light 1100A;

S320A: setting a see-through reflection unit 13A on the reflection side of the polarization beam splitting unit 12A to define an optical viewing axis 100A through the see-through reflection unit 13A and the polarization beam splitting unit 12A, wherein the polarization beam splitting unit 12A and all The angle between the optical viewing axes 100A is greater than 45°, wherein the see-through reflection unit 13A is used to reflect part or all of the first polarized image light rays 1101A reflected through the polarization beam splitter unit 12A back to the A polarization beam splitting unit 12A, and allows a part of ambient light to pass through to propagate to the polarization beam splitting unit 12A; and

S330A: A polarization conversion unit 14A is provided between the polarization beam splitting unit 12A and the see-through reflection unit 13A, and is used to convert the first polarized image light 1101A into the polarization conversion unit 14A after passing through the polarization conversion unit 14A twice. The second polarized image light ray 1102A is further incident on the human eye along the optical viewing axis 100A to be viewed.

It can be understood that, in the method for manufacturing the near-eye display optical machine 10A of the present invention, the order between the step S310A, the step S320A, and the step S330A is in no particular order.

It is worth noting that, in an example of the present invention, the polarization beam splitting unit 12A includes a light-transmitting substrate 121A and a polarization beam splitting film 122A, wherein the polarization beam splitting film 122A is disposed on the light-transmitting substrate 121A The first optical surface 120A, and the polarization beam splitting film 122A is located between the light-transmitting substrate 121A and the image source unit 11A.

In an example of the present invention, the shape of the first optical surface of the light-transmitting substrate is a free-form surface.

In an example of the present invention, the see-through reflection unit 13A includes a curved substrate 131A and a part of the reflective film 132A, wherein the partial reflective film 132A is disposed on the second optical surface 130A of the curved substrate 131A, with The first polarized image light 1101A is reflected so that the first polarized image light 1101A passes through the first quarter wave plate 141A twice to be converted into the second polarized image light 1102A.

In an example of the present invention, the surface shape of the second optical surface of the curved substrate is a free-form surface.

It is worth mentioning that, as shown in FIG. 18, the manufacturing method of the near-eye display optical machine 10A may further include steps:

S340A: setting an anti-interference unit 16A' on the side of the polarization beam splitting unit 12A away from the image source unit 11A, wherein the anti-interference unit 16A' includes a polarization filter element 161A' for absorbing the first polarization Light 101A, and transmits second polarized light 102A, wherein the polarization state of the first polarized light 101A is consistent with the polarization state of the first polarized image light 1101A; and the polarization state of the second polarized light 102A is The polarization state of the second polarized image ray 1102A remains the same.

It is worth noting that in recent years, with the rapid development of augmented reality technology, near-eye display devices capable of implementing augmented reality have become more and more popular and used by people. However, due to the limitation of the structure of the display light machine in the existing near-eye display device, the ambient light (hereinafter referred to as interference light) below the existing display light machine will inevitably be reflected into the user's eyes, causing the user to While viewing the scene in front of the display light machine, you will also see a virtual image of the object below the display light machine, which can cause visual interference.

In order to solve the above problems, referring to FIGS. 19 to 21, an embodiment of the present invention provides a display optical machine, which can effectively prevent the disturbing light below from being reflected into the eyes of users to prevent visual interference. Specifically, as shown in FIG. 19, the display optical machine 10B includes a display unit 11B, a relay system 12B, and a see-through reflection unit 13B. The display unit 11B is used to emit image light. The relay system 12B is provided in the transmission path of the display unit 11B. The see-through reflection unit 13B is provided in the reflection path of the relay system 12B, and is used to reflect the image light reflected by the relay system 12B back to the relay system 12B and allow ambient light to pass through the The perspective reflection unit 13B enters the relay system 12B, so that the image light and the ambient light can pass through the relay system 12B and enter the user's eyes, so that the user can simultaneously view the image to be displayed and Real environment to achieve the purpose of augmented reality.

Specifically, as shown in FIGS. 19 and 20, the relay system 12B of the display optical machine 10B includes a retroreflective element 121B, a polarization conversion element 122B, and a polarization filter element 123B, and the retroreflective element 121B, the polarization conversion element 122B, and the polarization filter element 123B are sequentially arranged along the emission path of the display unit 11B, that is, the retroreflective element 121B and the polarization conversion element 122B are located in the The polarization filter element 123B is between the display unit 11B, and the polarization conversion element 122B is located between the retroreflective element 121B and the polarization filter element 123B. In other words, the retroreflective element 121B, the polarization conversion element 122B, and the polarization filter element 123B of the relay system 12B are sequentially arranged from top to bottom, and the display unit 11B is located on the retroreflective element Above 121B, the disturbing light 100B from below the display light machine 10B passes through the polarizing filter element 123B, the polarizing conversion element 122B, and the retroreflective element 121B in sequence. It can be understood that, since the reflection path of the retroreflective element 121B is implemented as the reflection path of the relay system 12B, the see-through reflection unit 13B is provided on the reflection path of the retroreflective element 121B for The image light reflected through the retroreflective element 121B is reflected back to the relay system 12B.

More specifically, as shown in FIGS. 20 and 21, the polarization filter element 123B is used to transmit the first polarized light 101B and absorb the second polarized light 102B. The polarization conversion element 122B is used to convert the first polarized light 101B into the first circularly polarized light 103B, and also used to convert the second circularly polarized light 104B into the second polarized light 102B. The retroreflective element 121B is used to reflect a part of light and transmit another part of light.

It is worth noting that the polarization direction of the first polarized light 101B is preferably perpendicular to the polarization direction of the second polarized light 102B. For example, in an example of the present invention, the first polarized light may be implemented as S or P polarized light; accordingly, the second polarized light may be implemented as P or S polarized light, but not limited to . Of course, in other examples of the present invention, the first and second polarized lights may also be implemented as polarized lights in other directions perpendicular to each other.

Exemplarily, as shown in FIG. 20 and FIG. 21, according to the above-described embodiments of the present invention, the polarizing filter element 123B of the relay system 12B may be, but not limited to, implemented as a linear polarizer 1231B for allowing only The first polarized light 101B transmits and absorbs the second polarized light 102B. In this way, when the interfering light 100B from below the display optical device 10B passes through the linear polarizer 1231B, the polarizing conversion element 122B, and the retroreflective element 121B sequentially, the linear polarizer 1231B first absorbs the interference The second polarized light 102B in the light 100B, and transmits the first polarized light 101B in the interference light 100B to filter out the second polarized light 102B in the interference light 100B, so that the The disturbing light 100B is converted into the first polarized light 101B from unpolarized light; secondly, the first polarized light 101B from the polarizing filter element 123B is converted into the first circularly polarized light 103B by the polarization conversion element 122B; A part of the first circularly polarized light 103B from the polarization conversion element 122B is reflected back to the polarization conversion element 122B by the retroreflective element 121B, and converted into the second circularly polarized light 104B; finally, the polarized light The conversion element 122B converts the second circularly polarized light 104B from the retroreflective element 121B into the second polarized light 102B to be absorbed by the linear polarizer 1231B, so that the light from below the display light machine 10B The interfering light 100B cannot reach the user's eyes through the relay system 12B, so as to eliminate the visual interference caused by the interfering light 100B from below the display optical machine 10B, which helps to improve the user experience of the display optical machine 10B.

It is worth mentioning that, in the embodiment of the present invention, as shown in FIG. 20, the retroreflective element 121B of the relay system 12B may be, but not limited to, implemented as a half-reverse half lens 1211B for Reflect a part of the light and transmit another part of the light. For example, the half mirror lens 1211B may be, but not limited to, a lens that is coated with a half mirror film to allow half of the light to pass through and reflect the other half of the light. Of course, in other examples of the present invention, the retroreflective element 121B may also be implemented as other types of elements, as long as the effects of partial reflection and partial transmission of light can be achieved.

In addition, in the above-described embodiments of the present invention, as shown in FIGS. 20 and 21, the polarization conversion element 122B of the relay system 12B may be, but not limited to, implemented as a 1/4 wave plate 1221B for The first or second

polarized light

101B, 102B that passes through the quarter wave plate 1221B twice is converted into the second or first

polarized light

102B, 101B. In the relay system 12B of the display optical machine 10B of the present invention, the 1/4 wave plate 1221B is located between the half mirror half lens 1211B and the linear polarizer 1231B, so that when the interference light passes When the linear polarizer 1231B, the linear polarizer 1231B only allows the first polarized light 101B in the interference light 100B to pass through, and absorbs the second polarized light 102B in the interference light 100B; A polarized light 101B passes through the 1/4 wave plate 1221B for the first time to be converted into the first circularly polarized light 103B, and then is reflected back to the 1/4 wave plate 1221B by the half mirror half lens 1211B to be converted into the first Two circularly polarized light 104B, and then passes through the quarter wave plate 1221B for the second time to be converted into the second polarized light 102B, so that the first polarized light 101B passes through the quarter wave plate twice After 1221B, it is converted into the second polarized light 102B, so that the second polarized light 102B converted by the 1/4 wave plate 1221B is absorbed by the linear polarizer 1231B to eliminate the interference light 100B And caused visual interference.

It is worth noting that the transmission axis of the linear polarizer 1231B of the relay system 12B of the present invention can be in any direction, as long as the fast axis of the 1/4 wave plate 1221B and the linear polarizer 1231B are guaranteed There is only a predetermined angle θ (as shown in FIG. 21) in the transmission axis of, where the predetermined angle θ takes a value of about 45°, for example, 40°≦θ≦50°.

Preferably, the predetermined angle θ between the fast axis of the 1/4 wave plate 1221B and the transmission axis of the linear polarizer 1231B is implemented as 45°, so that the 1/4 wave is passed twice The polarization state of the polarized light after the sheet 1221B is perpendicular to the polarization state before passing through, so that the interference light 100B cannot be prevented from passing through the linear polarizer 1231B, so as to eliminate the visual interference caused by the interference light 100B.

Further, as shown in FIGS. 20 and 21, the relay system 12B may further include a protective substrate 124B, wherein the protective substrate 124B is located outside the polarizing filter element 123B, so that the polarizing filter element 123B The polarization conversion element 122B is between the protection substrate 124B and the half mirror half lens 1211B to protect and support the polarization filter element 123B and the polarization conversion element 122B through the protection substrate 124B. It can be understood that the protective substrate 124B may be, but not limited to, made of a light-transmitting material such as glass, transparent plastic, etc. to allow light to pass through the protective substrate 124B.

Preferably, as shown in FIGS. 20 and 21, the relay system 12B may further include an anti-reflection film 125B, wherein the anti-reflection film 125B is disposed on the outer surface of the protective substrate 124B for reducing interference The reflection of the light 100B on the outer surface of the protective substrate 124B helps to prevent visual interference. It can be understood that the antireflection film 125B may be, but not limited to, plated on the outer surface of the protection substrate 124B. For example, in other examples of the present invention, the antireflection film 125B may be directly attached to the outer surface of the protective substrate 124B.

It is worth mentioning that, as shown in FIG. 19, the display optical machine 10B according to the above embodiment of the present invention may further include a lens unit 14B, wherein the lens unit 14B is disposed on the display unit 11B and the The relay system 12B is used to modulate the image light from the display unit 11B, which helps to improve the image quality displayed by the display light machine 10B. It is worth noting that the lens unit 14B of the display optical machine 10B may include, but is not limited to, at least one lens for modulating image light emitted through the display unit 11B.

In addition, in the above embodiment of the present invention, as shown in FIG. 19, the see-through reflection unit 13B of the display light machine 10B may be, but not limited to, implemented as a curved mirror 131B, wherein the curved mirror 131B The reflection path provided in the relay system 12B is used to shape the image light while reflecting the image light transmitted through the relay system 12B back to the relay system 12B. It helps to improve the imaging quality of the display light machine 10B. It can be understood that the curved mirror 131B is a partial mirror, that is, it reflects and transmits light according to a certain ratio, so that the curved mirror 131B can not only reflect a part of the image light back into the human eye and allow the user to view the corresponding The image, and also allows ambient light to pass through the curved mirror 131B to enter the user's eyes to allow people to see the real environment, so as to achieve the purpose of augmented reality.

It is worth mentioning that in other examples of the present invention, the retroreflective element 121B of the relay system 12B may also be directly implemented as a semi-transparent semi-transparent membrane (not shown in the figure), wherein the semi-transparent The transflective film is directly disposed on the upper surface of the 1/4 wave plate 1221B, and is used to directly reflect a part of the first polarized light passing through the 1/4 wave plate 1221B back to the 1/4 wave plate 1221B, so that the first polarized light passes through the quarter wave plate 1221B twice to be converted into second polarized light, so as to be absorbed by the linear polarizer 1231B to avoid visual interference.

It is worth noting that the transflective film can be, but is not limited to, directly coated on the upper surface of the 1/4 wave plate 1221B, so that the relay system 12B can ensure the elimination of interference light on the display light On the premise of the visual interference generated by the machine 10B, the volume and weight of the display light machine 10B can also be reduced, which helps to meet the development needs of the display light machine 10B to be smaller, lighter and thinner. Of course, in yet another example of the present invention, the transflective film can also be provided on the surface of the quarter wave plate 1221B by attaching or the like.

FIG. 22 shows a first modified embodiment of the display light machine 10B according to the above-mentioned embodiment of the present invention. Compared with the above example according to the present invention, the display light machine 10B according to the first modified embodiment of the present invention is different in that the display unit 11B is used to emit image light having a predetermined spectrum, And the reflection spectrum of the see-through reflection unit 13B' is basically consistent with the predetermined spectrum of the image light, and is used to reflect the image light reflected through the relay system 12B back to the relay system 12B and allow ambient light Through the see-through reflective element 13A to enter the relay system 12B, so that the image light and the ambient light can pass through the relay system 12B and enter the user's eyes, so that the user can view the desired The displayed image and the real environment, thus achieving the purpose of augmented reality. It can be understood that, in this embodiment of the present invention, the error between the reflection spectrum and the predetermined spectrum within 20% can be regarded as that the reflection spectrum and the predetermined spectrum remain substantially consistent.

It is worth noting that, because the reflection spectrum of the see-through reflection unit 13B' is substantially the same as the predetermined spectrum of the image light emitted by the display unit 11B, the see-through reflection unit 13B' reflects only those with the predetermined spectrum Light, and allows light of other spectrums (such as ambient light with unpredetermined spectrum) to pass through. Therefore, when the image light is reflected by the relay system 12B to the perspective reflection unit 13B', most of the image light will be reflected back to the relay system 12B by the perspective reflection unit 13B', In order to block the image light from passing through the see-through reflection unit 13B' and reduce the escape of the image light, people cannot view the displayed image from the outside of the display light machine 10B, so as to protect the privacy of the user Therefore, the display optical machine 10B in this modified embodiment of the present invention can not only eliminate the visual interference caused by the interference light, but also protect the privacy of the user, which helps greatly improve the user experience.

Exemplarily, in the first modified embodiment of the present invention, as shown in FIG. 22, the see-through reflection unit 13B' includes a reflective film system 131B' and a curved base layer 132B', wherein the reflective film system 131B' is made by film design according to the predetermined spectrum of the image light, so that the reflection spectrum of the reflective film system 131B' is the same as the predetermined spectrum of the image light; the reflective film system 131B' It is disposed on the curved base layer 132B′, so that the reflective film system 131B′ has a curved shape, thereby forming the perspective reflection unit 13B′ having a curved structure, so that the perspective reflection unit 13B′ reflects the image At the same time as the light, the image light can also be modulated to improve the image quality displayed by the display light machine.

Specifically, the curved base layer 132B' may be made of a transparent material, such as glass, plastic, resin, polymer material, and other transparent materials, to allow light to pass through the curved base layer 132B', which helps to avoid the The curved base layer 132B' blocks ambient light from passing through the see-through reflection unit 13B'. Of course, in other examples of the present invention, the curved base layer 132B' may also be made of translucent materials, such as glass, plastic, resin, polymer materials, and other translucent materials, to allow light to partially pass through the curved surface The base layer 132B′ can appropriately reduce the ambient light from passing through the see-through reflection unit 13B′ to meet different scene requirements.

Exemplarily, the curved base layer 132B′ may be implemented as a curved lens, but the reflective film 131B′ is attached to the inner surface of the curved base layer 132B′, so that the reflective film 131B The shape of 'keeps substantially the same as the shape of the inner surface of the curved base layer 132B' to form the reflective film system 131B' having a curved shape. In this way, when the image light is incident on the see-through reflection unit 13B' via the relay system 12B, the image light first reaches the reflective film system 131B' to be reflected back by the reflective film system 131B' The relay system 12B does not need to pass through the curved base layer 132B' first, so as to prevent the curved base layer 132B' from absorbing the image light and reducing the light energy of the image light.

It is worth noting that in this variant embodiment of the present invention, for a detailed description and various variants of the see-through reflection unit 13B' of the display light machine 10B, reference may be made to the patent application number 201811523682.9 filed by the applicant The Chinese invention patent entitled "A display optical machine and its method and near-eye display device" will not be repeated in the present invention.

According to another aspect of the present invention, as shown in FIG. 23, the present invention further provides a near-eye display device equipped with a display light machine to eliminate visual interference caused by disturbing light from below the near-eye display device to users, which is helpful To improve the user experience. Exemplarily, as shown in FIG. 23, the near-eye display device 1B may include at least one display light machine 10B and a device body 20B, wherein the display light machine 10B is disposed on the device body 20B, so that the The near-eye display device 1B has a function to eliminate visual interference. In other words, when the user wears the near-eye display device 1B for an augmented reality experience, the interfering light from below the near-eye display device 1B will not be reflected by the display light machine 10B of the near-eye display device 1B to In the eyes of the user, to prevent the user from viewing the image below the near-eye display device 1B, thereby effectively eliminating visual interference.

It is worth noting that the device body 20B may be implemented as, but not limited to, a glasses body, so that the near-eye display device 1B is implemented as AR glasses with a function of eliminating visual interference, which helps to improve the user experience. It can be understood that, in other examples of the present invention, the near-eye display device 1B may also be implemented as other types of AR devices such as AR helmets.

According to another aspect of the present invention, the present invention further provides a manufacturing method of a display light machine. Specifically, as shown in FIG. 24, the manufacturing method of the display light machine 10B includes the steps of:

S310B: setting a relay system 12B to the transmission path of a display unit 11B, wherein the relay system 12B includes a retro-reflective element 121B and a polarization conversion element arranged in sequence along the transmission path of the display unit 11B 122B and a polarizing filter element 123B, wherein the retroreflective element 121B is used to reflect the image light emitted through the display unit 11B, and is used to reflect the first polarized light 101B from the polarizing filter element 123B; the polarization conversion The element 122B is used to convert the first polarized light 101B passing through the second time into the second polarized light 102B; the polarizing filter element 123B is used to absorb the second polarized light 102B and transmit the first polarized light 101B; with

S320B: Set a see-through reflection unit 13B on the reflection path of the relay system 12B, wherein the see-through reflection unit 13B is used to reflect the image light reflected through the retroreflective element 121B back to the relay system 12B.

It is worth noting that, in an example of the present invention, the retroreflective element 121B is implemented as a half reverse half lens 1211B.

In an example of the present invention, the polarization conversion element 122B is implemented as a 1/4 wave plate 1221B.

In an example of the present invention, the polarizing filter element 123B may be implemented as a linear polarizer 1231B.

According to another aspect of the present invention, the present invention further provides a visual interference cancellation method for a display light machine. Specifically, as shown in FIG. 25, the visual interference cancellation method includes the steps of:

S410B: A polarizing filter element 123B absorbs the second polarized light 102B in the interference light 100B, and transmits the first polarized light 101B in the interference light 100B;

S420B: Convert the first polarized light 101B from the polarized light filter element 123B into a first circularly polarized light 103B by a polarized light conversion element 122B;

S430B: Reflect the first circularly polarized light 103B converted by the polarization conversion element 122B by a retroreflective element 121B to form a second circularly polarized light 104B;

S440B: the second circularly polarized light 104 reflected from the retroreflective element 121B is converted into second polarized light 102B by the polarization conversion element 122B; and

S450B: The polarized light filter element 123B absorbs the second polarized light 102B converted by the polarized light conversion element 122B to eliminate visual interference caused by the interfering light 100B.

According to another aspect of the present invention, an embodiment of the present invention further provides a method for preventing the downward interference light reflected by the near-eye display device from reflecting to the user's eyes. Specifically, the method for preventing near-interference light reflected by a near-eye display device from reflecting to a user's eyes includes the steps of:

(A) absorb the second polarized light in the interfering light from below the near-eye display device, and transmit the first polarized light in the interfering light from below the near-eye display device;

(B) converting the first polarized light in the interfering light from below the near-eye display device into the second polarized light propagating toward the user's eyes; and

(C) Absorb the second polarized light propagating toward the user's eyes to prevent the interfering light rays from below the near-eye display device from being reflected to the user's eyes.

Further, in an example of the present invention, the step (B) of the method for preventing the reflection of the lower interference light from the near-eye display device to the user's eyes includes the steps of:

(B.1) Convert the first polarized light in the disturbing light from below the near-eye display device into first circularly polarized light;

(B.2) Reflect the first circularly polarized light to form a second circularly polarized light propagating toward the user's eyes;

(B.3) Convert the second circularly polarized light propagating toward the user's eyes into the second polarized light propagating toward the user's eyes.

In an example of the present invention, the method for preventing downward interference light reflected by a near-eye display device from reflecting to a user's eyes further includes the step before the step (A):

The transmission of the disturbing light from below the near-eye display device in the near-eye display device is enhanced to reduce the reflection of the disturbing light by the near-eye display device and prevent the disturbing light from being directly reflected to the user's eyes.

It is worth mentioning that, referring to FIG. 27 to FIG. 29, an embodiment of the present invention provides an anti-aliasing type display optical machine, which can effectively prevent the disturbing light below from being reflected into the user’s eyes to Prevent the occurrence of artifact interference. Specifically, as shown in FIG. 27, the display optical machine 10C includes a display unit 11C, a relay system 12C, a see-through reflection unit 13C, and a lens group unit 14C. The display unit 11C is used to emit image light. The lens group unit 14C is provided between the display unit 11C and the relay system 12C, and is used to modulate the image light emitted via the display unit 11C. The relay system 12C is used to transmit the image light modulated by the lens group unit 14C to the see-through reflection unit 13C. The perspective reflection unit 13C is used to reflect the image light transmitted through the relay system 12C back to the relay system 12C, and allow ambient light to pass through the perspective reflection unit 13C to enter the relay system 12C , So that the image light and the ambient light can penetrate the eyes of the user through the relay system 12C, so that the user can view the image to be displayed and the real environment at the same time, thereby achieving the purpose of augmented reality.

More specifically, as shown in FIGS. 27 and 28, the relay system 12C of the display optical machine 10C includes a polarization beam splitter element 121C, a polarization conversion element 122C, and a polarization filter element 123C, wherein the polarization beam splitter The element 121C is used to reflect light with a first polarization state and transmit light with a second polarization state, wherein the polarization direction of the light with the first polarization state is perpendicular to the polarization direction of the light with the second polarization state ; Wherein the polarization conversion element 122C is used to convert the second-pass light having the first polarization state into the light having the second polarization state; wherein the polarization filter element 123C is used to absorb the The light with the first polarization state transmits the light with the second polarization state. It can be understood that, in the above embodiments of the present invention, the light having the first polarization state may be, but not limited to, implemented as polarized light having an S polarization state (referred to as S polarized light for short); accordingly, the The light of the second polarization state may be, but not limited to, implemented as polarized light having a P polarization state (referred to as P polarized light for short).

In particular, as shown in FIG. 27, the polarizing beam splitting element 121C and the polarizing filter element 123C are sequentially arranged along the emission path of the display unit 11C from top to bottom, and the display unit 11C is located at the Above the polarizing beam splitting element 121C, the light having the second polarization state among the image rays emitted through the display unit 11C first passes through the polarizing beam splitting element 121C, and then passes through the polarizing filter element 123C. At the same time, as shown in FIGS. 27 and 28, the disturbing light from below the anti-aliasing display optical machine 10C is first filtered by the polarization filter element 123C, and then propagated to the polarization beam splitter element 121C. In this way, the light with the first polarization state in the interference light will be absorbed by the polarizing filter element 123C without being reflected by the polarization beam splitter element 121C into the user's eyes; Although the light of the two polarization states can pass through the polarization filter element 123C to propagate to the polarization beam splitter element 121C, it can pass through the polarization beam splitter element 121C without being reflected by the polarization beam splitter element 121C, so that Among the disturbing rays, the rays with the first and second polarization states will not be reflected into the user's eyes, so as to eliminate the artifact interference caused by the disturbing rays from below the anti-aliasing display optical machine 10C, Therefore, the anti-aliasing type display optical machine 10C is provided with an anti-artifact function, improving user experience. It can be understood that, for example, the image light and the interference light are generally both unpolarized light, that is, the image light and the interference light include both P-polarized light and S-polarized light. It is worth noting that, in order to distinguish the image light and the interference light in the figure, the P polarized light in the interference light is recorded as P* polarized light, and the S polarized light in the interference light is recorded as S* polarized light.

In addition, as shown in FIG. 27, the polarization conversion element 122C is disposed between the polarization beam splitter element 121C and the see-through reflection unit 13C, so that the image light emitted via the display unit 11C has the first polarization state The light is first reflected by the polarization beam splitter element 121C, passes through the polarization conversion element 122C for the first time and reaches the see-through reflection unit 13C, and then is reflected back by the see-through reflection unit 13C for a second pass Pass the polarization conversion element 122C to reach the polarization beam splitter element 121C, so that the light having the first polarization state in the image light passes through the polarization conversion element 122C twice to be converted to have the second polarization The light in the state of light then passes through the polarization beam splitter 121C to be incident on the eyes of the user, so that the user can obtain a good augmented reality experience.

In other words, the polarization beam splitter element 121C of the relay system 12C has an incident side, a reflection side, and a transmission side, wherein the display unit 11C corresponds to the incident side of the polarization beam splitter element 121C; The polarization conversion element 122C corresponds to the reflection side of the polarization beam splitter element 121C; the polarization filter element 123C corresponds to the transmission side of the polarization beam splitter element 121C. The light having the first polarization state in the image light emitted through the display unit 11C in this way is reflected by the polarization beam splitter element 121C to propagate toward the reflection side of the polarization beam splitter element 121C to the polarization conversion element 122C; the light having the second polarization state in the image light emitted from the display unit 11C is transmitted by the polarizing beam splitter element 121C to propagate toward the polarizing filter toward the transmission side of the polarizing beam splitter element 121C Element 123C. At the same time, ambient light (ie, interference light) from the transmission side of the polarization beam splitter element 121C will first be filtered by the polarization filter element 123C to absorb the light with the first polarization state among the interference light rays, and Allow the light with the second polarization state among the disturbing light to pass through; the light with the second polarization state among the disturbing light will also escape through the polarization beam splitter 121C and will not be reflected into the user's eyes , To eliminate artifact interference caused by interference with light, which helps to improve the user experience. It can be understood that, in the relay system 12C, the polarization beam splitter element 121C is also located on the transmission side of the polarization filter element 123C, so that the light with the second polarization state among the interfering rays passes through the After the polarizing filter element 123C, it can also pass through the polarizing beam splitter element 121C to eliminate artifacts caused by the interference light being reflected into the user's eyes.

It is worth mentioning that, in the embodiment of the present invention, as shown in FIG. 27 and FIG. 28, the polarization beam splitter element 121C of the relay system 12C may be, but not limited to, implemented by including a light-transmitting base A sheet 1211C and a polarizing beam splitting film 1212C, wherein the polarizing beam splitting film 1212C is disposed on the upper surface of the light-transmitting substrate 1211C, so that the polarizing beam splitting film 1212C is located on the light-transmitting substrate 1211C and the lens group Between the units 14C, so that the polarizing beam splitter 121C is implemented as a polarizing beam splitter for reflecting the light having the first polarization state among the image light emitted through the display unit 11C and allowing the image light The light in the second polarization state passes through. It can be understood that the polarization beam splitting film 1212C may be, but not limited to, attached or plated on the upper surface of the light-transmitting substrate 1211C. In addition, the light-transmitting substrate 1211C may be made of, but not limited to, light-transmitting materials such as optical plastic or optical glass, etc., to ensure that light can pass through the light-transmitting substrate 1211C.

In the above embodiment of the present invention, as shown in FIG. 27, the see-through reflection unit 13C may include, but is not limited to, a curved substrate 131C and a part of reflective film 132C, wherein the partial reflection film 132C is disposed on the curved substrate The inner surface of the sheet 131C, so that the partially reflective film 132C is located between the relay system 12C and the curved substrate 131C, is used to reflect the polarized beam splitter element 121C having the first polarization state At least a part of the light is reflected back to the polarization beam splitter element 121C, so that the light with the first polarization state passes through the polarization conversion element 122C twice to be converted into the light with the second polarization state, and then passes through After passing through the polarization beam splitter 121C, it is incident on the user's eyes. It can be understood that the partial reflection film 132C may be, but not limited to, attached or plated on the inner surface of the curved substrate 131C, and may also be disposed on the outer surface of the curved substrate 131C. In addition, the curved substrate 131C may be made of a light-transmitting material such as optical plastic or optical glass to ensure that ambient light can pass through the see-through reflection unit 13C.

It is worth noting that in the above embodiments of the present invention, the partial reflective film 132C may be, but not limited to, implemented as a semi-transparent semi-transparent film. Of course, in other examples of the present invention, the partial reflection film 132C may also be implemented as a reflection film system having a predetermined reflection spectrum, wherein the predetermined reflection spectrum of the reflection film system and the display unit 11C emit The spectrum of the image light remains consistent, which is used to reflect all the light reflected through the polarizing beam splitter 121C back to the polarizing beam splitter 121C, and also allows the inconsistent part of the ambient light spectrum to pass through the reflective film system for incident In the eyes of users, to ensure that the anti-artifact display optical machine 10C can prevent image leakage on the basis of eliminating the bottom reflection artifacts, improve the system's light energy utilization rate, improve image contrast, and has excellent augmented reality effect.

According to the above embodiment of the present invention, as shown in FIG. 27, the polarization conversion element 122C may be, but not limited to, implemented as a 1/4 wave plate 1221C for passing through the 1/4 wave plate 1221C twice The light having the first or second polarization state is converted into the light having the second or first polarization state. In other words, the first quarter wave plate 1221C is disposed between the polarization beam splitter element 121C and the see-through reflection unit 13C, so that the image light reflected by the polarization beam splitter element 121C has the first The light of a polarization state first passes through the first 1/4 wave plate 1221C to be converted into first circularly polarized light, after being reflected by the see-through reflection unit 13C to be converted into second circularly polarized light, and then second Passes through the first 1/4 wave plate 1221C to be converted into the light with the second polarization state so that the light with the first polarization state passes through the 1/4 wave plate 1221C twice It is converted into the light with the second polarization state, so that most of the image light reflected back can pass through the polarization beam splitter 121C. In particular, the light having the second polarization state transmitted through the polarizing beam splitter element 121C can also pass through the polarizing filter element 123C to be incident into the eyes of the user, and will not be disturbed by the provision of the polarizing filter element 123C Losing the energy of the light with the second polarization state helps to ensure that the anti-aliasing display optical machine 10C has a higher light energy utilization rate for the image light.

In the above embodiment of the present invention, as shown in FIG. 27, the lens group unit 14C of the anti-aliasing display optical machine 10C may include, but is not limited to, at least one lens 141C, in which the surface of each lens 141C The type may be, but not limited to, implemented as a standard spherical surface, aspherical surface, free-form surface, or diffraction surface for modulating and shaping the image light from the display unit 11C. In other words, the surface type of the at least one lens 141C may be, but not limited to, one or more selected from the group consisting of a standard spherical surface, aspherical surface, free-form surface, and diffraction surface. It can be understood that the free-form surface mentioned in the present invention may be, but not limited to, implemented as an XY polynomial free-form surface, a Zernike polynomial free-form surface, or a toric surface.

In addition, in the above-described embodiments of the present invention, the display unit 11C may be, but not limited to, implemented as one of LCD, OLED, DLP, and LCOS type micro display devices for providing the image light. In particular, when the display unit 11C is implemented as an LCOS type micro display device, the LCOS type micro display device can emit image light having a first polarization state so as to cooperate with the polarization beam splitter element 121C so that The image light emitted by the display unit 11C is not lost at the polarization beam splitter 121C, which helps to further improve the light energy utilization rate of the image light by the near-eye display optical machine 10C.

It is worth mentioning that, in this embodiment of the present invention, as shown in FIGS. 28 and 29, the polarizing filter element 123C of the relay system 12C may be, but not limited to, implemented as a linear polarizer 1231C, using Because only light with the second polarization state is allowed to pass through and absorb light with the first polarization state. Exemplarily, as shown in FIG. 27 and FIG. 28, the linear polarizer 1231C of the polarizing filter element 123C is implemented as a P polarizer to allow only P polarized light to pass through and absorb S polarized light in order to Match with the polarization beam splitting film 1212C of the polarization beam splitting element 121C (such as PBS film, which reflects S polarized light and transmits P polarized light).

Further, as shown in FIGS. 27 and 28, the relay system 12C may further include a protective substrate 124C, wherein the protective substrate 124C is located outside the polarizing filter element 123C, so that the polarizing filter element 123C Between the protection substrate 124C and the polarization beam splitter element 121C, to protect and support the polarization filter element 123C through the protection substrate 124C. It can be understood that the protective substrate 124C may be, but not limited to, made of a light-transmitting material such as glass, transparent plastic, etc. to allow light to pass through the protective substrate 124C.

Preferably, as shown in FIGS. 27 and 28, the relay system 12C may further include an anti-reflection film 125C, wherein the anti-reflection film 125C is disposed on the outer surface of the protective substrate 124C to reduce The reflection of the interference light on the outer surface of the protection substrate 124C helps to avoid visual interference. It can be understood that the antireflection film 125C may be, but not limited to, plated on the outer surface of the protective substrate 124C. For example, in other examples of the present invention, the antireflection film 125C may be directly attached to the outer surface of the protective substrate 124C.

It is worth mentioning that, as shown in FIG. 27, in the anti-aliasing type display optical machine 10C of the above embodiment of the present invention, the display optical axis 110C of the display unit 11C is generally perpendicular to the anti-aliasing Viewing axis 100C of the type display optical machine 10C, that is, the angle between the display optical axis 110C of the display unit 11C and the optical viewing axis 100C of the anti-aliasing type display optical machine 10C θ is 90°, that is, the angle between the polarization beam splitter 121C of the relay system 12C and the optical viewing axis 100C is usually 45°. It can be understood that the normal of the display surface of the display unit 11C can be defined as the display optical axis 110C of the display unit 11C; the optical viewing axis 100C of the anti-aliasing display optical machine 10C It can be implemented as a main viewing axis defined jointly by the polarization splitting element 121C and the polarization conversion element 122C of the relay system 12C, and the see-through reflection unit 13C, so that the user follows the optical viewing axis 100C It is possible to see both the virtual image displayed via the display unit 11C and the real image of the external environment, so as to obtain an augmented reality experience in which the virtual and real are integrated. It can be understood that the see-through reflection unit 13C can be optimally adjusted according to the specific system design.

However, since the angle between the polarizing beam splitter 121C and the optical viewing axis 100C is equal to 45°, the eye-relief (ie, the eye-point distance, such as the lens to the forehead) of the anti-aliasing display optical machine 10C The distance) is small, which is not conducive to adding adapters to nearsighted or farsighted users, resulting in poor user experience and comfort. In addition, this configuration is not conducive to the design adjustment of the entire system to make the anti-aliasing display optical machine 10C compact in structure, and cannot meet the current trend of miniaturization and thinning.

FIG. 30 shows a modified embodiment of the anti-aliasing type display optical machine 10C according to the above-mentioned embodiment of the present invention. Compared with the above example according to the present invention, the anti-aliasing type display optical machine 10C according to the modified embodiment of the present invention is different in that the display optical axis 110C of the display unit 11C is The included angle θ between the optical viewing axis 100C is less than 90°, that is, the included angle between the polarizing beam splitting element 121C of the relay system 12C and the optical viewing axis 100C is greater than 45°, thereby increasing the The eye-point distance of the anti-aliasing type display optical machine 10C, so that near-sighted or far-sighted users increase the adapter, improve the user's wearing experience and comfort.

Preferably, an angle θ between the display optical axis 110C of the display unit 11C and the optical viewing axis 100C is between 40° and 80°, that is, 40°≦θ≦80°. In this way, the configuration of the anti-aliasing type display optical machine 10C will facilitate the design adjustment of the entire system to make the anti-aliasing type display optical machine 10C compact in order to meet the current development of miniaturization and thinness trend.

According to another aspect of the present invention, as shown in FIG. 31, the present invention further provides a near-eye display device 1C equipped with an anti-aliasing type display optical machine 10C to eliminate interference light generated from below the near-eye display device 1C Artifacts, to avoid visual interference to users, help to improve the user experience. Exemplarily, as shown in FIG. 31, the near-eye display device 1C may include at least one anti-aliasing type display optical machine 10C and a device body 20C, wherein the anti-aliasing type display optical machine 10C is provided in the The device main body 20C, so that the near-eye display device 1C has a function to eliminate artifact interference. In other words, when the user wears the near-eye display device 1C for an augmented reality experience, the interference light from below the near-eye display device 1C will not be displayed by the anti-aliasing-type display light of the near-eye display device 1C The camera 10C is reflected into the user's eyes to prevent the user from viewing the image below the near-eye display device 1C, thereby effectively eliminating visual interference.

It is worth noting that the device body 20C may be, but is not limited to, implemented as a glasses body, so that the near-eye display device 1C is implemented as AR glasses with the function of eliminating artifact interference, which helps to improve the user experience. It can be understood that, in other examples of the present invention, the near-eye display device 1C may also be implemented as other types of AR devices such as AR helmets.

According to another aspect of the present invention, the present invention further provides a manufacturing method of a display light machine. Specifically, as shown in FIG. 32, the manufacturing method of the anti-aliasing display optical machine 10C includes the steps of:

S310C: A polarization conversion element 122C and a polarization filter element 123C are respectively disposed on the reflection side and the transmission side of a polarization beam splitter element 121C to form a relay system 12C, wherein the polarization beam splitter element 121C is used to reflect the first polarization Light with a second polarization state, and transmits light with a second polarization state, wherein the polarizing filter element 123C is used to absorb the light with a first polarization state and transmit the light with a second polarization state;

S320C: A display unit 11C and a lens group unit 14C are sequentially arranged on the incident side of the polarization conversion element 122C of the relay system 12C, so that the lens group unit 14C is located between the display unit 11C and the polarized light Between the conversion elements 122C; and

S330C: setting a see-through reflection unit 13C on the reflection side of the polarization conversion element 122C of the relay system 12C, and positioning the polarization conversion element 122C between the polarization splitting element 121C and the see-through reflection unit 13C In order to form the anti-aliasing type display optical machine 10C.

It is worth noting that, in an example of the present invention, the polarization beam splitter element 121C is implemented as a polarization beam splitter.

In an example of the present invention, the polarization conversion element 122C is implemented as a 1/4 wave plate 1221C.

In an example of the present invention, the polarizing filter element 123C may be implemented as a linear polarizer 1231C.

Further, in the above embodiment of the present invention, as shown in FIG. 32, the manufacturing method of the anti-aliasing type display optical machine 10C may further include steps:

S340C: providing a protective substrate 124C outside the polarizing filter element 123C, so that the polarizing filter element 123C is located between the protective substrate 124C and the polarizing beam splitter element 121C; and

S350C: An anti-reflection coating 125C is provided on the outer side of the protective substrate 124C, so that the protective substrate 124C is located between the anti-reflection coating 125C and the polarizing filter element 123C.

According to another aspect of the present invention, the present invention further provides an anti-aliasing method for an anti-artifact display optical machine. Specifically, as shown in FIG. 33, the anti-aliasing method for an anti-artifact display optical machine includes the steps of:

S410C: A polarizing filter element 123C absorbs the light having the first polarization state among the disturbing light rays, and transmits the light having the second polarization state among the disturbing light rays; and

S420C: by a polarization beam splitter element 121C on the transmission side of the polarizing filter element 123C, the light having the second polarization state among the interfering rays transmitted through the polarizing filter element 123C is transmitted to eliminate the cause Artifacts caused by the interference light being reflected into the user's eyes.

According to another aspect of the present invention, the present invention further provides a method for preventing near-end interference light from being reflected to a user's eye for a near-eye display device. Specifically, the method for preventing near-interference light reflected by a near-eye display device from reflecting to a user's eyes includes the steps of:

(a) Absorb the light with the first polarization state from the interference light from below the near-eye display device; and

(b) Transmitting the light with the second polarization state among the disturbing rays from below the near-eye display device twice to prevent the disturbing rays from below the near-eye display device from being reflected to the user's eyes.

Further, in an example of the present invention, the step (b) of the method for preventing downward interference light reflected by the near-eye display device from reflecting to the user's eyes includes the steps of:

(b.1) by a polarizing filter element of the near-eye display device, transmitting light with a second polarization state among the interfering light rays from below the near-eye display device; and

(b.2) Through a polarization beam splitting unit of the near-eye display device, the light having the second polarization state transmitted through the polarization filter element is transmitted.

Those skilled in the art should understand that the embodiments of the present invention shown in the above description and the drawings are only examples and do not limit the present invention. The object of the present invention has been completely and effectively achieved. The functions and structural principles of the present invention have been shown and described in the examples. Without departing from the principles, the embodiments of the present invention may have any variations or modifications.

Claims

A display optical machine, characterized in that it includes:

A display unit for emitting image light with a predetermined spectrum;

A relay component, wherein the relay component is disposed on the transmission path of the display unit; and

A see-through reflection assembly, wherein the see-through reflection assembly is disposed on a reflection path of the relay assembly, and a reflection spectrum of the see-through reflection assembly remains substantially consistent with the predetermined spectrum for use by the relay assembly The reflected image light is reflected back to the relay component to reduce the escape of the image light through the see-through reflective component.
The display optical machine according to claim 1, wherein the see-through reflective component includes a reflective film system, wherein the reflective film system is made by a film system design according to the predetermined spectrum, so that the reflective film system With the reflection spectrum.
The display optical machine according to claim 2, wherein the see-through reflective assembly further comprises a curved base layer, wherein the reflective film is disposed on the inner surface of the curved base layer.
The display optical machine according to claim 2, wherein the see-through reflective assembly further comprises a curved base layer, wherein the reflective film is disposed on the outer surface of the curved base layer.
The display optical machine according to claim 4, wherein the see-through reflective assembly further includes a protective film, wherein the protective film is disposed outside the reflective film system.
The display optical machine according to any one of claims 3 to 5, wherein the curved base layer is made of a transparent material or a translucent material.
The display optical machine according to any one of claims 3 to 5, wherein the curved base layer is a curved lens or a curved mirror.
The display optical machine according to any one of claims 1 to 5, wherein the see-through reflection component has a transmittance of 0 to 10% for light in a wavelength band of 420 to 480 nm, 510 to 570 nm, 605 to 660 nm, and others The transmittance of light in the wavelength band is 90 to 100%.
The display device according to any one of claims 2 to 5, wherein the thickness of the reflective film system is 0.05 to 0.15 mm.
The display optical machine according to any one of claims 1 to 5, wherein the relay component is a half mirror lens.
The display optical machine according to any one of claims 1 to 5, wherein the relay component is a polarization beam splitter.
The display optical machine according to claim 11, further comprising a 1/4 wave plate, wherein the 1/4 wave plate is disposed between the polarization beam splitter and the see-through reflection assembly.
The display optical machine according to any one of claims 1 to 5, further comprising a lens assembly, wherein the lens assembly is disposed between the display unit and the relay assembly.
A display optical machine, characterized in that it includes:

A display unit for emitting image light;

A relay component, wherein the relay component is disposed on the transmission path of the display unit;

A transmissive film system, wherein the transmissive film system is disposed between the display unit and the relay assembly, and the transmissive film system has a transmissive spectrum for allowing image light having the transmissive spectrum to pass through Past; and

A see-through reflection assembly, wherein the see-through reflection assembly is provided in the reflection path of the relay assembly, and the reflection spectrum of the see-through reflection assembly is kept opposite to the transmission spectrum of the transmission film system for The image light with the transmission spectrum reflected by the relay component is reflected back to the relay component to reduce the escape of the image light through the see-through reflection component.
A near-eye display device, characterized in that it includes:

A device body; and

At least one display light machine, wherein the display light machine is disposed on the device body so that the near-eye display device has a function of protecting privacy, wherein each of the display light machines includes:

A display unit for emitting image light with a predetermined spectrum;

A relay component, wherein the relay component is disposed on the transmission path of the display unit; and

A see-through reflection assembly, wherein the see-through reflection assembly is disposed on a reflection path of the relay assembly, and a reflection spectrum of the see-through reflection assembly remains substantially consistent with the predetermined spectrum for use by the relay assembly The reflected image light is reflected back to the relay component to reduce the escape of the image light through the see-through reflective component.
A display method of a display optical machine, which is characterized by comprising the steps of:

By a relay component, reflecting image light having a predetermined spectrum emitted through a display unit to a see-through reflective component, wherein the see-through reflective component has a reflection spectrum substantially consistent with the predetermined spectrum; and

With the see-through reflective component, the image light is reflected, so that the image light can be projected into the human eye through the relay component to display the image.
A manufacturing method of a display light machine, characterized in that it includes the steps of:

Setting a relay component in the emission path of a display unit, wherein the display unit is used to emit image light having a predetermined spectrum; and

A perspective reflection component is provided in the reflection path of the relay component, wherein the relay component is used to reflect the image light to the perspective reflection component, wherein the perspective reflection component has a basic level maintained with the predetermined spectrum A uniform reflection spectrum is used to reflect the image light.
The manufacturing method of the display optical machine according to claim 17, before the step of arranging a see-through reflective component in the reflection path of the relay component, further comprising the step of:

A reflective film system is provided with a curved base layer to make the see-through reflective component, wherein the reflective film system is made by film system design according to the predetermined spectrum.
The method for manufacturing a display optical machine according to claim 18, wherein the reflective film is plated on the surface of the curved base layer.
A near-eye display optical machine, characterized in that it includes:

An image source unit for emitting image light along the emission path;

A lens group unit, wherein the lens group unit is provided in the emission path of the image source unit for modulating the image light emitted through the image source;

A polarization beam splitting unit, wherein the polarization beam splitting unit is disposed on the emission path of the image source unit, and the lens group unit is located between the image source unit and the polarization beam splitting unit, wherein the polarization The angle between the beam splitting unit and the optical viewing axis of the near-eye display optical machine is greater than 45°, used to reflect the first polarized image light among the image light modulated by the lens group unit and transmitted through the lens The second polarized image light in the image light modulated by the group unit;

A see-through reflection unit, wherein the see-through reflection unit is provided on the reflection side of the polarization beam splitting unit, and the see-through reflection unit corresponds to the optical viewing axis of the near-eye display optical machine for passing the polarization Part or all of the first polarized image light reflected by the beam splitting unit is reflected back to the polarizing beam splitting unit and allows part of the ambient light to pass through; and

A polarization conversion unit, wherein the polarization conversion unit is disposed between the polarization beam splitting unit and the see-through reflection unit, for converting the first polarized image light into the second polarized image light after passing through twice , And then transmitted through the polarization beam splitting unit to enter the human eye.
The near-eye display optical machine according to claim 20, wherein an angle between the polarizing beam splitting unit and the optical viewing axis of the near-eye display optical machine is between 50° and 70°.
The near-eye display optical machine according to claim 21, wherein the polarizing beam splitting unit comprises a light-transmitting substrate and a polarizing beam splitting film, wherein the polarizing beam splitting film is disposed on the first optical of the light-transmitting substrate And the polarization beam splitting film is located between the light-transmitting substrate and the image source unit.
The near-eye display optical machine according to claim 22, wherein the surface shape of the first optical surface of the light-transmitting substrate is a free-form surface.
The near-eye display optical machine according to any one of claims 20 to 23, wherein the see-through reflection unit includes a curved substrate and a part of a reflective film, wherein the partial reflective film is provided on the second side of the curved substrate Two optical surfaces, and the partially reflective film is located between the curved substrate and the polarization beam splitting unit.
The near-eye display optical machine according to claim 24, wherein the surface shape of the second optical surface of the curved substrate is a free-form surface.
The near-eye display optical machine according to any one of claims 20 to 23, further comprising an anti-interference unit, wherein the anti-interference unit is located on a side of the polarization beam splitting unit away from the image source unit, for preventing Disturbing light from below creates visual interference.
The near-eye display optical machine according to claim 26, wherein the anti-interference unit includes a polarizing filter element, wherein the polarizing filter element is disposed on a side of the polarization beam splitting unit away from the image source unit, It is used to absorb the first polarized light and transmit the second polarized light, wherein the polarization state of the first polarized light and the polarization state of the first polarized image light remain the same, and the polarization state of the second polarized light and the second polarized light The polarization state of the polarized image light remains the same.
The near-eye display optical machine according to claim 27, wherein the polarizing filter element is a linear polarizer.
The near-eye display optical machine according to claim 28, wherein the anti-interference unit further includes a protective substrate and an antireflection film, wherein the protective substrate is located outside the polarizing filter element to filter the polarized light The element is between the protective substrate and the polarization beam splitting unit, wherein the antireflection film is provided on the outer surface of the protective substrate.
The near-eye display optical machine according to any one of claims 20 to 23, wherein the polarization conversion unit is a 1/4 wave plate.
The near-eye display optical machine according to any one of claims 20 to 23, wherein the lens group unit includes at least one lens, wherein each lens has a standard spherical surface, aspherical surface, free-form surface, and diffraction surface One of them.
The near-eye display light machine according to any one of claims 20 to 23, wherein the image source unit is one of an LCD type, an OLED type, a DLP type, and an LCOS type micro display device.
A near-eye display device is characterized by including:

A device body; and

At least one near-eye display light machine, wherein the near-eye display light machine is provided on the device body to assemble a compact near-eye display device, wherein the near-eye display light machine includes:

An image source unit for emitting image light along the emission path;

A lens group unit, wherein the lens group unit is provided in the emission path of the image source unit for modulating the image light emitted through the image source;

A polarization beam splitting unit, wherein the polarization beam splitting unit is disposed on the emission path of the image source unit, and the lens group unit is located between the image source unit and the polarization beam splitting unit, wherein the polarization The angle between the beam splitting unit and the optical viewing axis of the near-eye display optical machine is greater than 45°, used to reflect the first polarized image light among the image light modulated by the lens group unit and transmitted through the lens The second polarized image light in the image light modulated by the group unit;

A see-through reflection unit, wherein the see-through reflection unit is provided on the reflection side of the polarization beam splitting unit, and the see-through reflection unit corresponds to the optical viewing axis of the near-eye display optical machine for passing the polarization Part or all of the first polarized image light reflected by the beam splitting unit is reflected back to the polarizing beam splitting unit and allows part of the ambient light to pass through; and

A polarization conversion unit, wherein the polarization conversion unit is disposed between the polarization beam splitting unit and the see-through reflection unit, for converting the first polarized image light into the second polarized image light after passing through twice , And then transmitted through the polarization beam splitting unit to enter the human eye.
A method for manufacturing a near-eye display light machine, characterized in that it includes the steps of:

A lens group unit is disposed between an image source unit and a polarization beam splitting unit, and the lens group unit and the polarization beam splitting unit are both located in the emission path of the image source unit, wherein the lens group unit is used for The image light emitted via the image source is modulated, wherein the polarization beam splitting unit is used to reflect the first polarized image light in the modulated image light and transmit the second modulated light in the image light Polarized image light;

A see-through reflection unit is disposed on the reflection side of the polarization beam splitting unit to define an optical viewing axis through the see-through reflection unit and the polarization beam splitting unit, wherein the sandwich between the polarization beam splitting unit and the optical viewing axis The angle is greater than 45°, wherein the see-through reflection unit is used to reflect a part or all of the first polarized image light reflected by the polarization beam splitting unit back to the polarization beam splitting unit, and allow some of the ambient light to pass through ;as well as

A polarization conversion unit is provided between the polarization beam splitting unit and the see-through reflection unit to convert the first polarized image light into the second polarized image light after passing through the polarization conversion unit twice, and further Along the optical viewing axis, it is incident into the human eye.
The method for manufacturing a near-eye display optical machine according to claim 34, further comprising the steps of:

An anti-interference unit is disposed on a side of the polarization beam splitting unit away from the image source unit, wherein the anti-interference unit includes a polarization filter element for absorbing the first polarized light and transmitting the second polarized light, wherein The polarization state of the first polarized light is consistent with the polarization state of the first polarized image light; and the polarization state of the second polarized light is consistent with the polarization state of the second polarized image light.
A display optical machine, characterized in that it includes:

A display unit for emitting image light;

A relay system, wherein the relay system is provided in a transmission path of the display unit, and the relay system includes:

A retroreflective element, used to reflect a part of light and transmit another part of light;

A polarization conversion element for converting the first polarized light into the first circularly polarized light to form a second circularly polarized light after being reflected by the retroreflective element, and also for converting the second circularly polarized light into the second polarized light ;as well as

A polarized light filter element for absorbing the second polarized light and transmitting the first polarized light; wherein the retroreflective element, the polarized light conversion element and the polarized light filter element are sequentially along the emission path of the display unit Arranged such that the disturbing light passes through the polarizing filter element, the polarizing conversion element and the retroreflective element in sequence; and

A see-through reflection unit, wherein the transflective unit is provided in the reflection path of the retroreflective element of the relay system, for reflecting the image light reflected through the retroreflective element back to the relay system .
The display optical machine according to claim 36, wherein the polarization conversion element is a 1/4 wave plate; wherein the polarization filter element is a linear polarizer.
The display optical machine according to claim 37, wherein the predetermined angle between the fast axis of the quarter-wave plate and the transmission axis of the linear polarizer is 45°.
The display optical machine according to claim 38, wherein the retroreflective element is a half-reflective lens.
The display optical machine according to claim 39, wherein the relay system further includes a protective substrate, wherein the protective substrate is located outside the polarizing filter element to filter the polarizing conversion element and the polarizing light The element is located between the protective substrate and the retroreflective element.
The display optical machine according to claim 40, wherein the relay system further comprises an anti-reflection film, wherein the anti-reflection film is provided on the outer surface of the protective substrate for reducing interference light The visual interference caused by the reflection of the outer surface of the protection substrate.
The display optical machine according to claim 41, further comprising a lens unit, wherein the lens unit is disposed between the display unit and the relay system, and is used to perform image light from the display unit modulation.
The display optical machine according to any one of claims 36 to 42, wherein the see-through reflection unit is a curved mirror for reflecting the image light from the relay system back to the relay system At the same time, the image light is also shaped.
The display optical machine according to any one of claims 36 to 42, wherein the reflection spectrum of the see-through reflection unit and the predetermined spectrum of the image light emitted through the display unit remain substantially the same for The image light reflected by the relay system is reflected back to the relay system to reduce the amount of escape of the image light through the see-through reflection unit.
The display optical machine according to claim 44, wherein the see-through reflection unit includes a reflective film system and a curved base layer, wherein the reflective film system is disposed on the surface of the curved base layer, and the reflective film system According to the predetermined spectrum, it is made by a film system design so that the see-through reflection unit has the reflection spectrum.
A near-eye display device, characterized in that it includes:

A device body; and

At least one display light machine, wherein the display light machine is disposed on the device body so that the near-eye display device has a function of eliminating visual interference, wherein the display light machine includes:

A display unit for emitting image light;

A relay system, wherein the relay system is provided in a transmission path of the display unit, and the relay system includes:

A retroreflective element, used to reflect a part of light and transmit another part of light;

A polarization conversion element for converting the first polarized light into the first circularly polarized light to form a second circularly polarized light after being reflected by the retroreflective element, and also for converting the second circularly polarized light into the second polarized light ;as well as

A polarized light filter element for absorbing the second polarized light and transmitting the first polarized light; wherein the retroreflective element, the polarized light conversion element and the polarized light filter element are sequentially along the emission path of the display unit Arranged such that the disturbing light passes through the polarizing filter element, the polarizing conversion element and the retroreflective element in sequence; and

A see-through reflection unit, wherein the transflective unit is provided in the reflection path of the retroreflective element of the relay system, for reflecting the image light reflected through the retroreflective element back to the relay system .
A manufacturing method of a display light machine, characterized in that it includes the steps of:

A relay system is provided in a transmission path of a display unit, wherein the relay system includes a reverse transmission element, a polarization conversion element and a polarization filter element arranged in sequence along the transmission path of the display unit, wherein The retroreflective element is used to reflect the image light emitted through the display unit, and is used to reflect the first polarized light from the polarization filter element; wherein the polarization conversion element is used to pass the first Polarized light is converted into second polarized light; the polarizing filter element is used to absorb the second polarized light and transmit the first polarized light; and

A perspective reflection unit is provided in the reflection path of the relay system, wherein the perspective reflection unit is used to reflect the image light reflected by the retroreflective element back to the relay system.
A method for eliminating visual interference of a display optical machine, which is characterized by comprising the steps of:

A polarizing filter element absorbs the second polarized light in the interference light and transmits the first polarized light in the interference light;

Converting the first polarized light from the polarizing filter element into first circular polarized light by a polarizing conversion element;

By a retroreflective element, reflecting the first circularly polarized light converted by the polarization conversion element to form a second circularly polarized light reflected back to the polarization conversion element;

Converting the second circularly polarized light reflected back from the retroreflective element into the second polarized light by the polarization conversion element; and

The polarization filter element absorbs the second polarized light converted by the polarization conversion element to eliminate visual interference caused by the interference light.
The visual interference cancellation method according to claim 48, wherein the polarization conversion element is a 1/4 wave plate; wherein the polarization filter element is a linear polarizer.
A method for preventing near-interference light from reflecting to the user's eyes for a near-eye display device is characterized by including steps:

(A) absorb the second polarized light in the interfering light from below the near-eye display device, and transmit the first polarized light in the interfering light from below the near-eye display device;

(B) converting the first polarized light in the interfering light from below the near-eye display device into the second polarized light propagating toward the user's eyes; and

(C) Absorb the second polarized light propagating toward the user's eyes to prevent the interfering light rays from below the near-eye display device from being reflected to the user's eyes.
The method for preventing near-end interference light reflected by a near-eye display device according to claim 50 from reflecting to a user's eyes, wherein the step (B) includes the steps of:

(B.1) Convert the first polarized light in the disturbing light from below the near-eye display device into first circularly polarized light;

(B.2) Reflect the first circularly polarized light to form a second circularly polarized light propagating toward the user's eyes;

(B.3) Convert the second circularly polarized light propagating toward the user's eyes into the second polarized light propagating toward the user's eyes.
The method for preventing reflection of downward interference light rays of a near-eye display device to a user's eyes according to claim 50 or 51, further comprising the step before the step (A):

The transmission of the disturbing light from below the near-eye display device in the near-eye display device is enhanced to reduce the reflection of the disturbing light by the near-eye display device and prevent the disturbing light from being directly reflected to the user's eyes.
An anti-aliasing display optical machine, characterized in that it includes:

A display unit for emitting image light;

A lens group unit for modulating the image light emitted through the display unit;

A see-through reflective unit; and

A relay system, wherein the relay system includes:

A polarization beam splitting element, wherein the incident side of the polarization beam splitting element corresponds to the lens group unit, and the reflection side of the polarization beam splitting element corresponds to the see-through reflection unit, wherein the polarization beam splitting element is used for reflection to be modulated After the image light rays having the first polarization state, and transmitting the modulated light rays having the second polarization state in the image light;

A polarization conversion element, wherein the polarization conversion element is disposed between the polarization splitting element and the see-through reflection unit, wherein the see-through reflection unit is used to reflect the light reflected by the polarization splitting element with the first polarization The light of the state is reflected back to the polarization beam splitting element to pass through the polarization conversion element twice, wherein the polarization conversion element is used to convert the light with the first polarization state passing through twice into the second Polarized light; and

A polarizing filter element, wherein the polarizing filter element is disposed on the transmission side of the polarization beam splitter element, for absorbing the light with the first polarization state and transmitting the light with the second polarization state, so that the interference light The light with the first polarization state can be absorbed by the polarization filter element, and the light with the second polarization state in the interference light can sequentially pass through the polarization filter element and the polarization beam splitting element.
The anti-aliasing type display optical machine according to claim 53, wherein the polarizing filter element is a linear polarizer.
The anti-aliasing type display optical machine according to claim 54, wherein the polarizing beam splitting element comprises a light-transmitting substrate and a polarizing beam splitting film, wherein the polarizing beam splitting film is disposed on the light-transmitting substrate The upper surface, and the polarization beam splitting film is located between the light-transmitting substrate and the lens group unit.
The anti-aliasing type display optical machine of claim 55, wherein the polarization conversion element is a 1/4 wave plate.
The anti-aliasing type display optical machine according to claim 56, wherein the see-through reflection unit includes a curved substrate and a part of reflective film, wherein the partial reflective film is disposed on the inner surface of the curved substrate, And the partial reflection film is located between the curved substrate and the polarization conversion element.
The anti-artifact display optical machine according to any one of claims 53 to 57, wherein the relay system further includes a protective substrate, wherein the protective substrate is located outside the polarizing filter element, so that all The polarizing filter element is between the protective substrate and the polarizing beam splitting element.
The anti-aliasing type display optical machine according to claim 58, wherein the relay system further comprises an anti-reflection coating, wherein the anti-reflection coating is disposed on the outer surface of the protective substrate.
The anti-artifact display optical machine according to any one of claims 53 to 57, wherein the lens group unit includes at least one lens, wherein the surface type of each lens is a standard spherical surface, aspherical surface, and free-form surface And one of the diffraction planes.
The anti-artifact display optical machine according to any one of claims 53 to 57, wherein the display unit is one of an LCD type, an OLED type, a DLP type, and an LCOS type micro display device.
A near-eye display device, characterized in that it includes:

A device body; and

At least one anti-artifact-type display light machine, wherein the anti-artifact-type display light machine is provided on the device body to assemble into a near-eye display device with anti-artifact function; wherein the anti-artifact type display light The machine includes:

A display unit for emitting image light;

A lens group unit for modulating the image light emitted through the display unit;

A see-through reflective unit; and

A relay system, wherein the relay system includes:

A polarization beam splitting element, wherein the incident side of the polarization beam splitting element corresponds to the lens group unit, and the reflection side of the polarization beam splitting element corresponds to the see-through reflection unit, wherein the polarization beam splitting element is used for reflection to be modulated After the image light rays having the first polarization state, and transmitting the modulated light rays having the second polarization state in the image light;

A polarization conversion element, wherein the polarization conversion element is disposed between the polarization splitting element and the see-through reflection unit, wherein the see-through reflection unit is used to reflect the light reflected by the polarization splitting element with the first polarization The light of the state is reflected back to the polarization beam splitting element to pass through the polarization conversion element twice, wherein the polarization conversion element is used to convert the light with the first polarization state passing through twice into the second Polarized light; and

A polarizing filter element, wherein the polarizing filter element is disposed on the transmission side of the polarization beam splitter element, for absorbing the light with the first polarization state and transmitting the light with the second polarization state, so that the interference light The light with the first polarization state can be absorbed by the polarization filter element, and the light with the second polarization state in the interference light can sequentially pass through the polarization filter element and the polarization beam splitting element.
A manufacturing method of anti-aliasing type display optical machine, characterized in that it includes the steps of:

A polarization conversion element and a polarization filter element are respectively provided on the reflection side and the transmission side of a polarization beam splitting element to form a relay system, wherein the polarization beam splitting element is used to reflect light with a first polarization state and transmit Light with a second polarization state, wherein the polarization filter element is used to absorb the light with the first polarization state and transmit the light with the second polarization state;

Sequentially placing a display unit and a lens group unit on the incident side of the polarization conversion element of the relay system so that the lens group unit is located between the display unit and the polarization conversion element; and

A perspective reflection unit is provided on the reflection side of the polarization conversion element of the relay system, and the polarization conversion element is positioned between the polarization splitting element and the perspective reflection unit to form the Artifact display optical machine.
The method for manufacturing an anti-aliasing display optical machine according to claim 63, further comprising the steps of:

Providing a protective substrate outside the polarizing filter element, so that the polarizing filter element is located between the protective substrate and the polarizing beam splitting element; and

An antireflection film is provided on the outer side of the protective substrate, so that the protective substrate is located between the antireflection film and the polarizing filter element.
An anti-aliasing method for an anti-artifact display optical machine is characterized in that it includes the steps of:

By a polarizing filter element of the anti-aliasing type display optical machine, absorbing the light having the first polarization state among the disturbing rays and transmitting the light having the second polarization state among the disturbing rays; and

A polarization beam splitter element on the transmission side of the polarization filter element transmits the light having the second polarization state among the interference rays transmitted through the polarization filter element to eliminate the reflection of the interference light rays Artifacts in the eyes of the user.
A method for preventing near-interference light from reflecting to the user's eyes for a near-eye display device is characterized by including steps:

(a) Absorb the light with the first polarization state from the interference light from below the near-eye display device; and

(b) Transmitting the light with the second polarization state among the disturbing rays from below the near-eye display device twice to prevent the disturbing rays from below the near-eye display device from being reflected to the user's eyes.
The method for preventing downward interference light reflected by a near-eye display device according to claim 66 from reflecting to a user's eyes, wherein the step (b) includes the steps of:

(b.1) by a polarizing filter element of the near-eye display device, transmitting light with a second polarization state among the interfering light rays from below the near-eye display device; and

(b.2) Through a polarization beam splitting unit of the near-eye display device, the light having the second polarization state transmitted through the polarization filter element is transmitted.
The method for preventing the reflection of interference light below a user's eye for a near-eye display device according to claim 66 or 67, further comprising the step before the step (a):

The transmission of the disturbing light from below the near-eye display device in the near-eye display device is enhanced to reduce the reflection of the disturbing light by the near-eye display device and prevent the disturbing light from being directly reflected to the user's eyes.