WO2023066387A1

WO2023066387A1 - Optical module and optical system, display apparatus, heat-mounted display device, and display system

Info

Publication number: WO2023066387A1
Application number: PCT/CN2022/126789
Authority: WO
Inventors: 翁志彬; 来颖
Original assignee: 小派科技（上海）有限责任公司
Priority date: 2021-10-22
Filing date: 2022-10-21
Publication date: 2023-04-27
Also published as: CN114019679A

Abstract

An optical module and an optical system, a display apparatus, a head-mounted display device, and a display system, relating to the technical field of optical display. During use, the superposition position of a scanned image on a first image is adjusted by controlling the central optical axis of the scanned image. That is, a high-resolution scanned image can be superimposed and displayed at a specific position. Moreover, since human eyes (12) have relatively high requirements for image resolution of the central small-scale field of view, the central small-scale field of view of the human eyes (12) can be aligned with the high-resolution scanned image for viewing, and the viewing experience of a high-resolution center field of view of the human eyes (12) can be improved. The human eyes (12) do not have high requirements for resolution outside the center small-range field of view, and therefore, the resolution of the first image outside the center small-range view field does not affect the impression, and a first image source (1) can adopt an image source having a low resolution, so that the overall device cost of the optical display apparatus can be reduced.

Description

Optical modules and optical systems, display devices, head-mounted display devices and display systems

technical field

The present application relates to the field of optical display technology, in particular to an optical module and optical system, a display device, a head-mounted display device and a display system.

Background of the invention

Existing display technologies generally display a single image on a screen. If it is desired to superimpose and display images with different resolutions on the screen, a single screen cannot meet this requirement. How to superimpose and display images with different resolutions on one screen is a technical problem to be solved in this field.

Contents of the invention

In view of this, the present application provides an optical module, an optical system, a display device, a head-mounted display device, and a display system, which can realize overlapping display of images with different resolutions.

In order to solve the above technical problems, the present application provides an optical module, including: a first image source for displaying a first image; an imaging medium for imaging the first image; a second image source for emitting an image light; the main two-dimensional scanner is arranged in the light emitting direction of the second image source, and the main two-dimensional scanner is used to scan and reflect the image light to emit a scanning image track; and a secondary two-dimensional scanner, Connected with the main two-dimensional scanner, the auxiliary two-dimensional scanner is used to drive the main two-dimensional scanner to rotate; wherein, the imaging medium is located in the scanning reflection direction of the main two-dimensional scanner, and the The scanning image trajectory is irradiated on the imaging medium to form a scanning image, and the resolution of the scanning image is higher than that of the first image.

Optionally, in a possible implementation manner, the optical module further includes: an eye tracking module configured to: detect the gaze point position of the human eye on the imaging medium; The eye tracking module is electrically connected, and the processing module obtains the information of the gaze point position; wherein, the processing module is electrically connected with the secondary two-dimensional scanner, and the processing module is configured to information, and control the secondary two-dimensional scanner to align the central optical axis of the scanned image with the position of the gaze point.

Optionally, the main two-dimensional scanner includes a first base and a first vibrating mirror, and the first vibrating mirror is rotatably connected to the first base; the auxiliary two-dimensional scanner includes an auxiliary two-dimensional A scanner base and a first rotating body, the first rotating body is rotatably connected to the auxiliary two-dimensional scanner base, and the first base is connected to the first rotating body.

Optionally, in a possible implementation manner, the optical module further includes: a projection objective lens group, the light incident side of the projection objective lens group is located in the scanning reflection direction of the main two-dimensional scanner, the The imaging medium is located on the light exit side of the projection objective lens group.

Optionally, the projection objective lens group includes: a half-mirror, and the reflection band of the half-mirror is the light band of the second image source.

Optionally, the second image source includes: a light source, configured to generate visible light; and a modulation module, electrically connected to the light source, and configured to modulate the light source.

Optionally, the light source includes: a plurality of monochromatic light sources, each of which is used to generate monochromatic light of different wavelength bands, and the modulation module is used to modulate each of the monochromatic light sources, so that The monochromatic light source emits modulated monochromatic light corresponding to the wavelength band; and a beam combining component is arranged on the light output path of the monochromatic light source, and the beam combining component is used to combine the modulated monochromatic light of different bands The photosynthetic beam is the image light.

Optionally, one of the monochromatic light sources is a red light source with a first light output window, and the red light source emits modulated red light from the first light output window; one of the monochromatic light sources is a green light source , having a second light output window, the green light machine emits modulated green light from the second light output window; The third light exit window emits modulated green light; wherein, the beam combining component includes: a third reflector, arranged in the light exit direction of the first light exit window, and the reflection band of the optical surface of the third reflector is Red light band; the first dichroic mirror is arranged on the light exit direction of the second light exit window, the transmission band of the first dichroic mirror is the red light band, and the reflection of the first dichroic mirror The waveband is the green light waveband; and the second dichroic mirror is arranged in the light exit direction of the third light exit window, the transmission waveband of the second dichroic mirror is the red light waveband and the green light waveband, and the second dichroic mirror The reflection wavelength band of the two dichroic mirrors is the blue light band; wherein, the third reflecting mirror, the first dichroic mirror and the second dichroic mirror are parallel to each other.

Optionally, a scattering film layer is provided on the display surface of the imaging medium.

In another embodiment, the present application provides an optical system, including: two aforementioned optical modules, the two optical modules serve as a left-eye viewing component and a right-eye viewing component respectively, and the left-eye viewing component and the The right-eye viewing components are symmetrically distributed.

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

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

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

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

In another embodiment, the present application provides a head-mounted display device, including the aforementioned display device.

In another embodiment, the present application provides a display system, the display system is a virtual reality and/or augmented reality display system, the display system includes a signal input module and the aforementioned head-mounted display device, the head-mounted display device The display device receives the signal from the signal input module and processes the signal.

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

Optionally, the display system is a virtual and/or augmented reality display all-in-one machine, and the processing module is further configured to control the operation controller and the display content of the first image source and the display content of the second image source Display content.

The beneficial effect of the present application is embodied in that: when in use, the central optical axis of the scanned image can be controlled to adjust the superimposed position of the scanned image on the first image. That is, the high-resolution scanned image can be superimposed and displayed at a specific position. At the same time, since the human eye has high requirements for the image resolution of the small central field of view, the small central field of view of the human eye can be viewed in alignment with the high-resolution scanned image, which can improve the viewing of the high-resolution central field of view of the human eye. experience. The human eye does not have high requirements for the resolution outside the central small field of view, so the lower resolution of the first image outside the central small field of view will not affect the perception, then the first image source can use an image with a lower resolution source, thereby reducing the overall device cost of the optical display device.

Brief description of the drawings

FIG. 1 is a schematic structural diagram of an optical module provided by an embodiment of the present application.

FIG. 2 is a schematic diagram of the installation structure of the main two-dimensional scanner and the auxiliary two-dimensional scanner in this application.

FIG. 3 is a schematic diagram of the structure when the projection objective lens group is set in the present application.

FIG. 4 is a schematic structural diagram of the display system of the present application.

Modes of Carrying Out the Invention

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

FIG. 1 is a schematic structural diagram of an optical module provided by an embodiment of the present application. This embodiment provides an optical module, as shown in Figure 1, the optical module includes: a first image source 1, an imaging medium 2, a second image source 5, a main two-dimensional scanner 6 and a secondary two-dimensional scanner 7.

Wherein, the first image source 1 is used for displaying the first image, and the imaging medium 2 is used for imaging the first image. The first image source 1 can be a projector or a self-luminous display, and the first image source 1 shown in FIG. The luminous display panel, the first image source 1 and the imaging medium 2 together constitute a display, and the imaging medium 2 is a transmissive panel of the first image source 1, specifically, the imaging medium 2 may be flat glass. In addition, the first image source 1 can also be a projector, and the first image source 1 projects an image on the imaging medium 2 to display the first image.

The second image source 5 is used to emit image light different from the first image, and the main two-dimensional scanner 6 is arranged on the light emitting direction of the second image source 5, and the main two-dimensional scanner 6 is used to scan and reflect the image light to Outgoing scanning image trajectory; the auxiliary two-dimensional scanner 7 is connected with the main two-dimensional scanner 6, and the auxiliary two-dimensional scanner 7 is used to drive the main two-dimensional scanner 6 to rotate; wherein the imaging medium 2 is located at the main two-dimensional scanner 6 In the scanning reflection direction, the scanning image track is irradiated on the imaging medium 2 to form a scanning image.

When this embodiment is in use, when the second image source 5 irradiates the image light on the main two-dimensional scanner 6, the main two-dimensional scanner 6 performs two-dimensional scanning reflection on the image light, and scans the image under a certain time integral. The track is a raster scanning pattern or a Lissajous scanning image on the imaging medium 2 , and the pattern of the scanning image depends on the scanning mode of the main 2D scanner 6 . The secondary 2D scanner 7 can drive the main 2D scanner 6 to rotate, that is, the imaging position of the scanned image on the imaging medium 2 can be changed by changing the irradiation direction of the scanned image. The resolution of the scanned image can be higher than the resolution of the first image, and the image size of the scanned image can be smaller than the image size of the first image, that is, a small image with higher resolution can be superimposed on the first image on the imaging medium 2. image to achieve high-resolution display of small areas.

The specific control principle will be described below with reference to FIG. 1 and FIG. 2 .

FIG. 2 is a schematic diagram of the installation structure of the main two-dimensional scanner and the auxiliary two-dimensional scanner in this application. As shown in Figure 2, the auxiliary two-dimensional scanner 7 includes an auxiliary two-dimensional scanner base 71 and a first rotating body 72, the first rotating body 72 is rotatably connected to the auxiliary two-dimensional scanner base 71, and the auxiliary two-dimensional scanning A rotation driving assembly is provided in the base 71 of the device, which can drive the first rotating body 72 to rotate. Specifically, for example, a rotating motor may be installed in the auxiliary two-dimensional scanner base 71, and the rotating motor drives the first rotating body 72 to rotate. The first rotating body 72 may be a flat plate, and the main 2D scanner 6 is installed on the surface of the first rotating body 72 . Both the main two-dimensional scanner 6 and the auxiliary two-dimensional scanner 7 can be micro-electro-mechanical (MEMS, Micro-Electro-Mechanical System) scanners. The main two-dimensional scanner 6 includes a first base 61 and a first vibrating mirror 62. When the main two-dimensional scanner 6 is stationary, the first rotation of the scanning mirror of the main two-dimensional scanner 6 and the auxiliary two-dimensional scanner 7 Body 72 is parallel. The main 2D scanner 6 uses the first rotating body 72 as a supporting body to perform scanning operations. When the main two-dimensional scanner 6 is at rest, the perpendicular line on the surface of the first oscillating mirror 62 is the central optical axis of the image scanned by the main two-dimensional scanner 6, and the main two-dimensional scanner 6 is installed on the first rotating body 72 , so the perpendicular to the surface of the first rotating body 72 is the central optical axis of the scanning image of the main two-dimensional scanner 6 .

Therefore, actually controlling the direction of the perpendicular of the first rotating body 72 of the sub-2D scanner 7 can control the central optical axis of the scanned image to adjust the position of the scanned image on the first image.

To sum up, with the structure of the present application, the superimposition position of the scanned image on the first image can be adjusted by controlling the central optical axis of the scanned image through the secondary two-dimensional scanner 7. That is, the high-resolution scanned image can be superimposed and displayed at a specific position.

At the same time, since the human eye 12 has high requirements for the image resolution of the central small-scale field of view, the central small-scale field of view of the human eye 12 can be viewed in alignment with the high-resolution scanned image, which can improve the high-resolution central field of view of the human eye 12. field viewing experience. The human eye 12 does not have high requirements for the resolution outside the central small field of view, so the lower resolution of the first image outside the central small field of view will not affect the perception, then the first image source 1 can use a lower resolution image source, thereby reducing the overall device cost of the optical module.

Optionally, the optical module further includes an eye tracking module 3 and a processing module 4 . The eye tracking module 3 is configured to detect the position of the gaze point of the human eye 12 on the imaging medium 2 , the processing module 4 is electrically connected to the eye tracking module 3 , and the processing module 4 obtains the information of the gaze point position. The processing module 4 is electrically connected to the secondary 2D scanner 7, and the processing module 4 is configured to control the secondary 2D scanner 7 to align the central optical axis of the scanned image with the gaze point position according to the gaze point position information.

According to the visual habits of the human eye, the human eye generally only has high-resolution requirements for images in the central small-range field of view, and does not have too high a requirement for the resolution of regions outside the central small-range field of view. For this visual habit, after the eye tracking module 3 detects the position of the fixation point of the human eye 12 on the imaging medium 2, the processing module 4 obtains the information of the fixation point position, and then controls the steering of the auxiliary two-dimensional scanner 7 according to the data. , thereby changing the imaging position of the scanned image on the imaging medium 2 .

The auxiliary two-dimensional scanner 7 can adopt a mechanical scanner, a MEMS scanner or a simple scanning and rotating structure. The relative positions of each device are set in advance, and according to the position of the gaze point, a simple algorithm can be used to obtain the angle to which the secondary two-dimensional scanner 7 can be rotated to align the scanned image with the gaze point position. Specifically, due to the determination of the relative positions of the auxiliary two-dimensional scanner 7 and the imaging medium 2, the position of the gaze point, the auxiliary two-dimensional scanner 7, the vertical foot of the vertical line between the auxiliary two-dimensional scanner 7 and the imaging medium 2, these three The three position points form a triangle, and according to the law of cosines, the auxiliary two-dimensional scanner 7 can be controlled to align the central optical axis of the scanned image with the gaze point.

According to the real-time gaze point position, the cosine law is used to calculate the first angle between the line connecting the secondary two-dimensional scanner 7 and the gaze point position and the vertical line on the surface of the imaging medium 2 . Here, the connecting line between the secondary two-dimensional scanner 7 and the gaze point position can use the geometric center of the secondary two-dimensional scanner 7 and the connecting line of the gaze point position. Then control the auxiliary two-dimensional scanner 7 to rotate, so that the second included angle between the median perpendicular to the surface of the first rotating body 72 of the auxiliary two-dimensional scanner 7 and the perpendicular to the surface of the imaging medium 2 is equal to the first included angle. The median perpendicular to the surface of the first rotating body 72 of the secondary two-dimensional scanner 7 is aligned with the gaze point, that is, the central optical axis of the scanned image is aligned with the gaze point. Regarding the control of the second included angle, a reference direction can be set in advance, for example, when the vertical line of the first rotating body 72 is perpendicular to the surface of the imaging medium 2, the second included angle is 0°, and the secondary angle is controlled by the reference direction. The rotation of the two-dimensional scanner 7 changes the angle value of the second included angle.

Through the eye tracking module 3 and the processing module 4, the central optical axis of the scanned image can be controlled to align with the fixation point in real time, so that the central small-range field of view of the human eye's gaze area can have a high-resolution small area, and the human eye can be improved. 12's high resolution central field of view viewing experience. And through the eye-tracking module 3, the high-resolution scanning image can be tracked and displayed on the central small-range field of view of the human eye gaze area in real time. Since the human eye 12 does not have high requirements for the image resolution of the field of view other than the small central field of view, the first image source 1 can use an image source with a lower resolution, thereby reducing the overall device cost of the optical module.

Optionally, the displayed content of the scanned image is the same as the displayed content of the first image at the region of the scanned image on the first image, but the resolution of the scanned image is higher than that of the first image in the region, and the scanned image Superimposed on the first image. Moreover, the first image source 1 can close the display content of the first image at the area of the scanned image on the first image in real time, or reduce the display of the first image at the area of the scanned image on the first image in real time brightness.

FIG. 3 is a schematic diagram of the structure when the projection objective lens group is set in the present application. Optionally, as shown in FIG. 3 , the optical module further includes a projection objective lens group 11, the light-incoming side of the projection objective lens group 11 is located in the scanning reflection direction of the main two-dimensional scanner 6, and the imaging medium 2 is located in the projection objective lens group 11 The human eye 12 is located in the viewing area of the imaging medium 2 on the light emitting side. FIG. 3 is a schematic side view. When viewing the structure of the present application from the front of the imaging medium 2, the projection objective lens group 11 is not between the imaging medium 2 and the human eye 12, but on the side of the imaging medium.

The irradiation direction of the scanned image can be changed by the projection objective lens group 11 . The size of the scanned image can also be adjusted, that is, the display size of the scanned image on the imaging medium 2 can be adjusted. Through the projection objective lens group 11, the placement position of the main two-dimensional scanner 6 can be made more flexible, thereby improving the installation flexibility of various components of the optical module. Specifically, the projection objective lens group 11 can be a reflecting mirror, a lens, a half-mirror, etc. When the projection objective lens group 11 adopts a reflecting mirror or a half-mirror, the projection direction of the scanned image can be changed, and the imaging medium 2 can be placed The location is more flexible.

Optionally, the second image source 5 includes a light source and a modulation module, the light source is used to generate visible light. The modulation module is electrically connected to the light source, and the modulation module is used for modulating the light source, and the modulated visible light emitted by the light source is image light.

As shown in FIG. 1 , the light source includes a beam combiner 52 and a plurality of monochromatic light sources 51, each monochromatic light source 51 is used to generate monochromatic light of different wavelength bands, and the modulation module is used to modulate each monochromatic light source 51 to The monochromatic light source 51 is made to emit modulated monochromatic light corresponding to the wavelength band. The beam combining component 52 is arranged on the light output path of the monochromatic light source 51, and the beam combining component 52 is used to combine the modulated monochromatic light of different wavelength bands into image light. By combining multiple monochromatic light sources 51 , image display with better colors can be realized.

Specifically, one of the monochromatic light sources 51 is a red light source, the red light source has a first light output window, and the red light source emits modulated red light through the first light output window. One of the monochromatic light sources 51 is a green light machine, which has a second light output window, and the green light machine emits modulated green light from the second light output window. One of the monochromatic light sources 51 is a blue light source, the blue light source has a third light output window, and the blue light source emits modulated green light through the third light output window.

The beam combining component 52 includes a third mirror 521 , a first dichroic mirror 522 and a second dichroic mirror 523 . The third reflecting mirror 521 is arranged in the light emitting direction of the first light emitting window, and the reflection band of the optical surface of the third reflecting mirror 521 is a red light band. The first dichroic mirror 522 is arranged in the light emitting direction of the second light emitting window, the transmission wavelength band of the first dichroic mirror 522 is the red light band, and the reflection wavelength band of the first dichroic mirror 522 is the green light band. The second dichroic mirror 523 is arranged on the light exit direction of the third light exit window, the transmission waveband of the second dichroic mirror 523 is the red light waveband and the green light waveband, and the reflection waveband of the second dichroic mirror 523 is the blue light waveband . The third reflecting mirror 521 , the first dichroic mirror 522 and the second dichroic mirror 523 are parallel to each other.

Optionally, the display surface of the imaging medium 2 is provided with a scattering film layer. When the scanned image is irradiated on the scattering film layer, the scattering film layer can improve the scattering ability of the imaging medium 2 to the scanned image, thereby increasing the visibility of the scanned image. angle. Specifically, the first image source may be a projector, and the projector projects image light corresponding to the first image on the imaging medium 2 to display the first image.

The present application also provides an optical system, which includes: the aforementioned optical module, two optical modules respectively serving as a left-eye viewing component and a right-eye viewing component, and the left-eye viewing component and the right-eye viewing component are symmetrically distributed. When in use, the user's left and right eyes view images from the two optical modules respectively.

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

When in use, when the human eye is in the reflection direction of the imaging medium, the image formed on the imaging medium can be viewed. The optical module can track the position of the human eye's fixation point and display a small area of high-resolution in the central field of view of the human eye. image. Specifically, the display device may be a transmissive/non-transmissive display type virtual reality/augmented reality product, or a head-mounted virtual reality/augmented reality product. The fixed structure provides support for the optical system, avoiding the displacement of various parts of the optical system during use, so as to ensure the durability of the optical system. When the display device is a transmissive virtual reality/augmented reality product, the imaging medium is a transflective lens, so that human eyes can view the real scene outside the imaging medium.

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

When in use, the display device can be worn on the user's head through the head wearing component, and the user's head provides support for the display device, and can conveniently watch virtual reality or augmented reality images.

Optionally, the display device further includes a housing and a camera, the optical system is accommodated in the housing, and the housing can effectively protect the optical system and avoid damage to the optical system. The lens of the camera faces the human eye, and the camera can be used to perform eye-tracking function, that is, the camera is electrically connected to the eye-tracking module. Real-time gaze location.

The present application also provides a head-mounted display device, including the aforementioned display device, wherein the head-mounted assembly includes a spectacle frame, the spectacle frame includes temples, and the optical system is fixed between the temples. In this embodiment, the temples can be hung on the user's ears, and the imaging medium can be installed on the lens installation position of the spectacle frame, so that the head-mounted display device can be conveniently worn on the user's head, providing virtual reality display for the user Or an augmented reality display. When the display device is a transmissive virtual reality/augmented reality product, the imaging medium installed at the lens installation position is a semi-transparent and semi-reflective lens, so that human eyes can watch the real scene outside the imaging medium.

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

FIG. 4 is a schematic structural diagram of the display system of the present application. The present application also provides a display system. The display system is a virtual reality and/or augmented reality display system. As shown in FIG. 4 , the display system includes a signal input module 13 and the aforementioned head-mounted display device. The signals of the signal input module 13 are transmitted to the head-mounted display device for processing. The signal input module 13 includes an operation controller electrically connected to the head-mounted display device. Optionally, the display system is a virtual and/or augmented reality display all-in-one machine, and the processing module 4 is also used to control the operation controller and the display content of the first image source and the display content of the second image source.

In some embodiments, as shown in FIG. 4 , the display system further includes a memory 15 , the processing module 4 is electrically connected to the second image source 5 and the signal input module 13 respectively, and the memory 15 is used to store executable instructions of the processing module 4 .

When used, the processing module 4 may be a central processing unit (CPU) or other form of processing unit having data processing capabilities and/or instruction execution capabilities, and may control other components in the display system to perform desired functions.

Memory 15 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The volatile memory may include random access memory (RAM) and/or cache memory (cache), etc., for example. Non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, and the like. One or more computer program instructions can be stored on the computer-readable storage medium, and the processing module 4 can execute the program instructions to control the second image source 5 to emit image light.

The signal input module 13 may be interconnected with the processing module 4 through a bus system and/or other forms of connection mechanisms (not shown), and the signal input module 13 may include, for example, a keyboard, a mouse, a joystick, and a touch screen.

Of course, for simplicity, only some components in the display system related to the present application are shown in FIG. 4 , and components such as bus, input/output interface, etc. are omitted. Besides, the display system may also include any other suitable components according to specific applications.

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

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

In the devices, equipment and methods of the present application, each component or each step can be decomposed and/or reassembled. These decompositions and/or recombinations should be considered equivalents of this application.

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

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

Claims

An optical module, comprising:

The first image source is used to display the first image;

an imaging medium for imaging the first image;

The second image source is used to emit image light;

The main two-dimensional scanner is arranged in the light emitting direction of the second image source, and the main two-dimensional scanner is used for scanning and reflecting the image light to emit a scanning image track; and

a secondary two-dimensional scanner connected to the main two-dimensional scanner, and the secondary two-dimensional scanner is used to drive the main two-dimensional scanner to rotate;

Wherein, the imaging medium is located in the scanning reflection direction of the main two-dimensional scanner, the scanning image track is irradiated on the imaging medium to form a scanning image, and the resolution of the scanning image is higher than that of the first image resolution.
The optical module according to claim 1, further comprising:

An eye tracking module configured to detect the gaze point position of the human eye on the imaging medium; and

A processing module is electrically connected to the eye tracking module, and the processing module acquires information on the position of the fixation point;

Wherein, the processing module is electrically connected to the auxiliary two-dimensional scanner, and the processing module is configured to control the auxiliary two-dimensional scanner to align the central optical axis of the scanned image according to the information of the gaze point position. align the gaze point.
The optical module according to claim 1 or 2, wherein,

The main two-dimensional scanner includes a first base and a first vibrating mirror, and the first vibrating mirror is rotatably connected to the first base;

The auxiliary 2D scanner includes a base of the auxiliary 2D scanner and a first rotating body, the first rotating body is rotatably connected to the base of the auxiliary 2D scanner, the first base is connected to the base of the auxiliary 2D scanner The first rotor is connected.
The optical module according to any one of claims 1 to 3, further comprising:

A projection objective lens group, the light-incoming side of the projection objective lens group is located in the scanning reflection direction of the main two-dimensional scanner, and the imaging medium is located at the light-emitting side of the projection objective lens group.
The optical module according to claim 4, wherein the projection objective lens group comprises:

A half-mirror, where the reflection waveband of the half-mirror is the light waveband of the second image source.
The optical module according to any one of claims 1 to 5, wherein the second image source comprises:

a light source for generating visible light; and

A modulation module is electrically connected to the light source, and the modulation module is used for modulating the light source.
The optical module according to claim 6, wherein the light source comprises:

A plurality of monochromatic light sources, each of which is used to generate monochromatic light in different bands, and the modulation module is used to modulate each of the monochromatic light sources so that the monochromatic light sources emit light of a corresponding band modulated modulated monochromatic light; and

A beam combining component is arranged on the light-emitting optical path of the monochromatic light source, and the beam combining component is used to combine the modulated monochromatic light of different wavelength bands into the image light.
The optical module according to claim 7, wherein,

One of the monochromatic light sources is a red light machine with a first light exit window, and the red light machine emits modulated red light from the first light exit window;

One of the monochromatic light sources is a green light source with a second light output window, and the green light source emits modulated green light from the second light output window; and

One of the monochromatic light sources is a blue light machine with a third light output window, and the blue light machine emits modulated green light from the third light output window;

Wherein, the bundle assembly includes:

The third reflector is arranged in the light exit direction of the first light exit window, and the reflection band of the optical surface of the third reflector is a red light band;

The first dichroic mirror is arranged in the light exit direction of the second light exit window, the transmission band of the first dichroic mirror is the red light band, and the reflection band of the first dichroic mirror is the green light band band; and

The second dichroic mirror is arranged on the light exit direction of the third light exit window, the transmission bands of the second dichroic mirror are the red light band and the green light band, and the reflection of the second dichroic mirror The band is the Blu-ray band;

Wherein, the third reflecting mirror, the first dichroic mirror and the second dichroic mirror are parallel to each other.
The optical module according to any one of claims 1 to 8, wherein a scattering film layer is provided on the display surface of the imaging medium.
An optical system comprising:

Two optical modules as claimed in any one of claims 1 to 9, the two optical modules are respectively used as a left-eye viewing component and a right-eye viewing component, and the left-eye viewing component and the right-eye viewing Components are symmetrically distributed.
A display device, applied to a virtual reality device or an augmented reality device, the display device comprising:

The optical system of claim 10; and

A fixed structure, the optical system is connected to the fixed structure.
The display device according to claim 11, further comprising:

The head wearing component is connected with the fixed structure, and the head wearing component is used to be worn on the head of a person.
The display device according to claim 11 or 12, further comprising:

a housing, the optical system is accommodated in the housing.
The display device according to any one of claims 11 to 13, further comprising:

A camera, the lens of the camera faces the human eye.
A head-mounted display device, comprising the display device according to any one of claims 12-14.
A display system, the display system is a virtual reality and/or augmented reality display system, wherein the display system includes a signal input module and the head-mounted display device according to claim 15, the head-mounted display The device is used to receive the signal of the signal input module and process the signal.
The display system according to claim 16, wherein,

The signal input module includes an operation controller electrically connected to the head-mounted display device.
The display system according to claim 17, wherein the display system is a virtual and/or augmented reality display all-in-one machine, and the processing module is further configured to control the display content of the operation controller and the first image source and the display content of the second image source.