Display module and imaging method
阅读说明：本技术 显示模组及成像方法 (Display module and imaging method ) 是由 孙洁 李瑞华 于 2018-09-07 设计创作，主要内容包括：本申请提供一种显示模组及成像方法,其中显示模组包括：红色光波导镜片、绿色光波导镜片、蓝色光波导镜片、白色光波导镜片和至少一个投影光机；其中,至少一个投影光机通过第一光路将第一光信号入射红色光波导镜片、绿色光波导镜片和蓝色光波导镜片,经过这些光波导镜片衍射后所出射的光共同在第一焦平面呈现第一图像；至少一个投影光机还通过第二光路将第二光信号入射白色光波导镜片,经过该光波导镜片衍射后所出射的出射光在第二焦平面呈现第二图像,第二焦平面与第一焦平面处于不同的平面上。本申请提供的显示模组及成像方法,通过较少的光波导镜片即可获得两个焦平面显示的功能,一定程度上简化了具备多个焦平面显示功能的显示模组的结构。(The application provides a display module assembly and imaging method, wherein the display module assembly includes: the device comprises a red light waveguide lens, a green light waveguide lens, a blue light waveguide lens, a white light waveguide lens and at least one projection light machine; the at least one projection light machine enables a first light signal to be incident into the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens through a first light path, and lights emitted after being diffracted by the light waveguide lenses jointly represent a first image on a first focal plane; the at least one projection light machine further enables a second light signal to enter the white light waveguide lens through a second light path, emergent light emitted after diffraction of the light waveguide lens presents a second image on a second focal plane, and the second focal plane and the first focal plane are located on different planes. The application provides a display module assembly and imaging method can obtain the function that two focal planes show through less optical waveguide lens, has simplified the structure of the display module assembly that possesses a plurality of focal planes display function to a certain extent.)
1. The utility model provides a display module assembly, its characterized in that, display module assembly includes in being applied to augmented reality's display device or virtual reality's display device:
the device comprises a red light waveguide lens, a green light waveguide lens, a blue light waveguide lens, a white light waveguide lens and at least one projection light machine;
the red light waveguide lens, the green light waveguide lens, the blue light waveguide lens and the white light waveguide lens are arranged in parallel, and the focuses of the red light waveguide lens, the green light waveguide lens, the blue light waveguide lens and the white light waveguide lens are on the same straight line;
the at least one projection light machine is used for enabling a first light signal representing a first image to be incident to the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens through a first light path, and enabling a second light signal representing a second image to be incident to the white light waveguide lens through a second light path;
the red light waveguide lens is used for receiving and diffracting red light in the first optical signal and then emitting the red light, the blue light waveguide lens is used for receiving and diffracting blue light in the first optical signal and then emitting the blue light, the green light waveguide lens is used for receiving and diffracting green light in the first optical signal and then emitting the green light, and the light emitted by the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens jointly presents the first image on a first focal plane;
the white optical waveguide lens is used for receiving and diffracting white light in the second optical signal and then emitting the white light, emergent light emitted by the white optical waveguide lens presents the second image on a second focal plane, and the second focal plane and the first focal plane are on different planes.
2. The display module of claim 1,
the first light path comprises a red light path, a green light path and a blue light path;
the at least one projector is specifically configured to inject the red light into the red light waveguide lens through the red light path, inject the green light into the green light waveguide lens through the green light path, and inject the blue light into the blue light waveguide lens through the blue light path.
3. The display module according to claim 1 or 2,
the at least one light projector engine comprises: a first projector for projecting a first optical signal representing a first image through the first optical path into the red light waveguide lens, the green light waveguide lens, and the blue light waveguide lens; and a second optical signal representing a second image is incident on the white light waveguide lens through the second optical path.
4. The display module of claim 3,
the first light projector includes: the red light source, the green light source, the blue light source and the white light source are independently arranged;
wherein the red light source is configured to generate the red light, the green light source is configured to generate the green light, and the blue light source is configured to generate the blue light; the first light signal representing a first image comprises the red, green, and blue light;
the white light source is configured to generate the white light, and the second optical signal representing the second image is the white light.
5. The display module according to claim 1 or 2,
the at least one light projector engine comprises: the first projector is used for transmitting a first optical signal representing a first image to the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens through the first optical path; the second projector is used for transmitting a second optical signal representing a second image to the white light waveguide lens through the second optical path.
6. The display module of claim 5,
the first light projector includes: a red light source, a green light source and a blue light source, wherein the red light source is configured to generate the red light, the green light source is configured to generate the green light, the blue light source is configured to generate the blue light, and the first light signal representing the first image includes the red light, the green light and the blue light;
the second light projector includes: and a white light source for generating the white light, wherein the second optical signal representing the second image is the white light.
7. The display module according to any one of claims 1-6, further comprising: n white light waveguide lenses, N is an integer greater than or equal to 1;
the at least one projection light machine is further configured to respectively inject N optical signals into the N white light waveguide lenses through N optical paths, where the N optical signals carry different images;
the N white light waveguide lenses are respectively used for diffracting the light signals incident by the projection light machine and then emitting the light signals, so that images corresponding to the incident light signals are displayed on different N focal planes.
8. The display module according to any one of claims 1-7,
the exit pupil gratings of the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens are all arc-shaped, and the focuses of the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens are all located in the first focal plane.
9. The display module according to any one of claims 1-8,
the exit pupil grating of the white optical waveguide lens is arc-shaped, and the focus of the white optical waveguide lens is positioned in the second focus plane.
10. An imaging method, comprising:
acquiring a first optical signal representing a first image and a second optical signal representing a second image;
diffracting red light in the first optical signal by a first optical path and then emitting, diffracting green light in the first optical signal by the first optical path and then emitting, and diffracting blue light in the first optical signal by the first optical path and then emitting, so as to present the first image at a first focal plane;
and diffracting the white light in the second optical signal through a second optical path and then emitting the white light to present the second image on a second focal plane, wherein the second focal plane is on a different plane from the first focal plane.
11. The imaging method of claim 10, wherein the first optical path comprises: a red light path, a green light path and a blue light path; the diffracting red light in the first optical signal by the first optical path and emitting, diffracting green light in the first optical signal by the first optical path and emitting, and diffracting blue light in the first optical signal by the first optical path and emitting includes:
the red light in the first optical signal is diffracted by the red optical path and then emitted, the green light in the first optical signal is diffracted by the green optical path and then emitted, and the blue light in the first optical signal is diffracted by the blue optical path and then emitted.
12. The imaging method according to claim 10 or 11, wherein the acquiring a first light signal representing a first image and a second light signal representing a second image comprises:
and generating the first light signal for representing the first image and the second light signal for representing the second image through a first projection light machine.
13. The imaging method of claim 12, wherein the generating, by a first projector engine, the first light signal representing a first image and the second light signal representing a second image comprises:
the red light is generated by a red light source independently arranged by the first projector, the green light is generated by a green light source independently arranged by the first projector, and the blue light is generated by a blue light source independently arranged by the first projector; the first light signal representing a first image comprises the red, green, and blue light; and generating the white light by a white light source arranged on the first projector.
14. The imaging method according to claim 10 or 11, wherein the acquiring a first light signal representing a first image and a second light signal representing a second image comprises:
and generating the first optical signal for representing the first image through a first projection light machine, and generating the second optical signal for representing the second image through a second projection light machine.
15. The method of claim 14, wherein generating the first light signal representing the first image with a first light projector engine and the second light signal representing the second image with a second light projector engine comprises:
generating the red light by a red light source independently disposed by the first projector, generating the green light by a green light source independently disposed by the first projector, and generating the blue light by a blue light source independently disposed by the first projector, the first light signal representing the first image including the red light, the green light, and the blue light; and generating the white light by a white light source arranged on the second projector.
16. The imaging method of any of claims 10-15, further comprising:
acquiring N optical signals, wherein the N optical signals carry different images, and N is an integer greater than or equal to 1;
and diffracting the N optical signals through N optical paths and then emitting the N optical signals so as to present N images corresponding to the N optical signals on different N focal planes.
17. The imaging method of any one of claims 10 to 16, wherein said diffracting red light in said first light signal by a first light path and exiting, diffracting green light in said first light signal by said first light path and exiting, and diffracting blue light in said first light signal by said first light path and exiting, comprises:
diffracting red light in the first light signal by a red light waveguide optic and exiting from an exit pupil grating, diffracting green light in the first light signal by a green light waveguide optic and exiting from an exit pupil grating, diffracting blue light in the first light signal by a blue light waveguide optic and exiting from an exit pupil grating to present the first image at a first focal plane;
the exit pupil gratings of the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens are all arc-shaped, and the focuses of the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens are all located in the first focal plane.
18. The imaging method according to any one of claims 10 to 17, wherein the diffracting the white light in the second optical signal by the second optical path and then emitting the white light comprises:
diffracting the white light in the second optical signal by a white light waveguide lens and then emitting the white light from an exit pupil grating;
the exit pupil grating of the white optical waveguide lens is arc-shaped, and the focus of the white optical waveguide lens is located in the second focal plane.
19. An augmented reality device, comprising:
a sensor for acquiring a real scene image;
and the display module according to any one of claims 1 to 9, wherein the display module is configured to image on at least two focal planes and to be displayed to a user in superposition with the real scene image.
20. A virtual reality device, comprising:
the display module according to any one of claims 1 to 9, for imaging on at least two focal planes and presenting to a user;
and the processor is used for controlling a projection light machine in the display module to generate a first light signal representing the first image and a second light signal representing the second image.
Technical Field
The application relates to the technical field of display, in particular to a display module and an imaging method.
Background
Augmented Reality (AR) is a technology capable of projecting virtual content represented by an image or video onto an AR display device (e.g., AR glasses) and enabling a user to see the projected virtual content and real content in the real world at the same time through the AR display device. Virtual Reality (VR) is a technology that is capable of projecting Virtual content of an image or video representation onto a VR display device (e.g., VR glasses) so that a user is immersed into a fully Virtual world through the VR display device.
Disclosure of Invention
The application provides a display module and an imaging method, which are used for simplifying the structure of the display module with a plurality of focal plane display functions to a certain extent.
This application first aspect provides a display module assembly, display module assembly is applied to augmented reality's display device or virtual reality's display device in, display module assembly includes:
the device comprises a red light waveguide lens, a green light waveguide lens, a blue light waveguide lens, a white light waveguide lens and at least one projection light machine;
the red light waveguide lens, the green light waveguide lens, the blue light waveguide lens and the white light waveguide lens are arranged in parallel, and the focuses of the red light waveguide lens, the green light waveguide lens, the blue light waveguide lens and the white light waveguide lens are on the same straight line;
the at least one projection light machine is used for enabling a first light signal representing a first image to be incident to the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens through a first light path, and enabling a second light signal representing a second image to be incident to the white light waveguide lens through a second light path;
the red light waveguide lens is used for receiving and diffracting red light in the first optical signal and then emitting the red light, the blue light waveguide lens is used for receiving and diffracting blue light in the first optical signal and then emitting the blue light, the green light waveguide lens is used for receiving and diffracting green light in the first optical signal and then emitting the green light, and the light emitted by the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens jointly presents the first image on a first focal plane;
the white optical waveguide lens is used for receiving and diffracting white light in the second optical signal and then emitting the white light, emergent light emitted by the white optical waveguide lens presents the second image on a second focal plane, and the second focal plane and the first focal plane are on different planes.
The display module provided in this embodiment can make the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens diffract the first light signal and then emit the first light signal through the first light path by using at least one projector, so that the first image is presented on the first focal plane, and the second image is presented on the white light waveguide lens through the second light path, so that the second image is presented on the second focal plane by making the white light waveguide lens diffract the second light signal and then emit the second light signal, and the first focal plane and the second focal plane are located on different planes. Thereby can obtain through four optical waveguide lenses and show the function that shows different images at two different focal planes through a display module assembly, compare with the mode of a plurality of red light waveguide lenses of stack, green light waveguide lens and blue light waveguide lens, reduce the use of optical waveguide lens, and then reduced display module assembly's weight, volume and cost, simplified the structure of the display module assembly that possesses a plurality of focal planes display function to a certain extent. When the display module provided by the embodiment is applied to the AR/VR display device with multiple focal plane display functions, the structure of the AR/VR display device with multiple focal plane display functions can be simplified to a certain extent.
In an embodiment of the first aspect of the present application, the first optical path includes a red optical path, a green optical path, and a blue optical path; the at least one projector is specifically configured to inject the red light into the red light waveguide lens through the red light path, inject the green light into the green light waveguide lens through the green light path, and inject the blue light into the blue light waveguide lens through the blue light path.
The display module in this embodiment can be through different light paths with red light, green light and blue light alone incide with in the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens that these light correspond for the light of diffraction only exists the light of single colour in every optical waveguide lens. And for each optical waveguide lens, the emergent light of the optical waveguide lens only has light with a single color, so that the emergent light of the three optical waveguide lenses can be diffracted more uniformly on a first image formed by the first focal plane together, and crosstalk between optical waveguides with different colors does not exist in the diffraction process of each optical waveguide lens, thereby improving the visual effect of human eyes on the first image.
In an embodiment of the first aspect of the present application, the at least one light projector engine comprises: a first projector for projecting a first optical signal representing a first image through the first optical path into the red light waveguide lens, the green light waveguide lens, and the blue light waveguide lens; and a second optical signal representing a second image is incident on the white light waveguide lens through the second optical path.
In an embodiment of the first aspect of the present application, the first projector engine comprises: the red light source, the green light source, the blue light source and the white light source are independently arranged;
wherein the red light source is configured to generate the red light, the green light source is configured to generate the green light, and the blue light source is configured to generate the blue light; the first light signal representing a first image comprises the red, green, and blue light; the white light source is configured to generate the white light, and the second optical signal representing the second image is the white light.
Alternatively, in an embodiment of the first aspect of the present application, the at least one light projector engine includes: the first projector is used for transmitting a first optical signal representing a first image to the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens through the first optical path; the second projector is used for transmitting a second optical signal representing a second image to the white light waveguide lens through the second optical path.
In an embodiment of the first aspect of the present application, the first projector engine comprises: a red light source, a green light source and a blue light source, wherein the red light source is configured to generate the red light, the green light source is configured to generate the green light, the blue light source is configured to generate the blue light, and the first light signal representing the first image includes the red light, the green light and the blue light; the second light projector includes: and a white light source for generating the white light, wherein the second optical signal representing the second image is the white light.
In this embodiment, at least one of the light projectors in the above embodiments is improved on the existing basis, and the light source in the first light projector is set as three red light sources, green light sources, and blue light sources that are independently set, or an independent white light source may be further set in the first light projector, so that light of a corresponding color emitted by each light source irradiates the microdisplay and then generates independent red light, green light, and blue light, and white light. So that the first projector independently exits the pupil and independently enters the red light waveguide lens, the green light waveguide lens, the blue light waveguide lens and the white light waveguide lens corresponding to the red light, the green light, the blue light and the white light with different wavelengths. And then the diffraction of the first image formed by the emergent light of the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens is uniform, and the crosstalk between the light waveguides with different colors does not exist in the diffraction process of each light waveguide lens, so that the visual effect of human eyes on the first image is improved.
In an embodiment of the first aspect of the present application, the exit pupils of the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens are all arc-shaped, and the focuses of the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens are all located in the first focal plane.
In an embodiment of the first aspect of the present application, the exit pupil grating of the white optical waveguide lens is in an arc shape, and the focal point of the white optical waveguide lens is located in the second focal plane.
The red light waveguide lens, the green light waveguide lens, the blue light waveguide lens and the white light waveguide lens provided in this embodiment all use optical field type optical waveguide lenses with optical power, wherein an outcoupling grating of the optical waveguide lens itself is a diffraction lens, and the outgoing light of the optical waveguide lens has a focus by bending the outcoupling grating. Therefore, the AR/VR display device is not required to be additionally provided with a convex lens for enabling the emergent light to have a focus outside the display module, and the structure of the AR/VR display device is further simplified when the display module provided by the embodiment is applied to the AR/VR display device with a plurality of focal plane display functions.
In an embodiment of the first aspect of the present application, the AR/VR display module further includes: n white light waveguide lenses, N is an integer greater than or equal to 1;
the at least one projection light machine is further configured to respectively inject N optical signals into the N white light waveguide lenses through N optical paths, where the N optical signals carry different images;
the N white light waveguide lenses are respectively used for diffracting the light signals incident by the projection light machine and then emitting the light signals, so that images corresponding to the incident light signals are displayed on different N focal planes.
The display module that this embodiment provided still includes N white light waveguide lenses on the basis of above-mentioned embodiment to can be on the basis that two focal planes provided in the aforesaid, make the display module realize showing the image of more different focal planes. And every increase a focal plane, only need increase a white light waveguide lens on original basis to the increase and the use of optical waveguide lens have been reduced, and then weight, volume and the cost that have reduced display module assembly have simplified the structure that possesses the display module assembly of a plurality of focal planes function.
A second aspect of the present application provides an imaging method comprising:
acquiring a first optical signal representing a first image and a second optical signal representing a second image;
diffracting red light in the first optical signal by a first optical path and then emitting, diffracting green light in the first optical signal by the first optical path and then emitting, and diffracting blue light in the first optical signal by the first optical path and then emitting, so as to present the first image at a first focal plane;
and diffracting the white light in the second optical signal through a second optical path and then emitting the white light to present the second image on a second focal plane, wherein the second focal plane is on a different plane from the first focal plane.
In an embodiment of the second aspect of the present application, the first optical path includes: a red light path, a green light path and a blue light path; the diffracting red light in the first optical signal by the first optical path and emitting, diffracting green light in the first optical signal by the first optical path and emitting, and diffracting blue light in the first optical signal by the first optical path and emitting includes:
the red light in the first optical signal is diffracted by the red optical path and then emitted, the green light in the first optical signal is diffracted by the green optical path and then emitted, and the blue light in the first optical signal is diffracted by the blue optical path and then emitted.
In an embodiment of the second aspect of the present application, the acquiring a first optical signal representing a first image and a second optical signal representing a second image includes: and generating the first light signal for representing the first image and the second light signal for representing the second image through a first projection light machine.
In an embodiment of the second aspect of the present application, the generating, by the first projector engine, the first light signal representing the first image and the second light signal representing the second image includes: the red light is generated by a red light source independently arranged by the first projector, the green light is generated by a green light source independently arranged by the first projector, and the blue light is generated by a blue light source independently arranged by the first projector; the first light signal representing a first image comprises the red, green, and blue light; and generating the white light by a white light source arranged by the first projector.
In an embodiment of the second aspect of the present application, the acquiring a first optical signal representing a first image and a second optical signal representing a second image includes: and generating the first optical signal for representing the first image through a first projection light machine, and generating the second optical signal for representing the second image through a second projection light machine.
In an embodiment of the second aspect of the present application, the generating, by a first light projector, the first light signal representing a first image and generating, by a second light projector, the second light signal representing a second image includes: generating the red light by a red light source independently disposed by the first projector, generating the green light by a green light source independently disposed by the first projector, and generating the blue light by a blue light source independently disposed by the first projector, the first light signal representing the first image including the red light, the green light, and the blue light; and generating the white light by a white light source arranged on the second projector.
In an embodiment of the second aspect of the present application, N optical signals are obtained, where the N optical signals carry different images, and N is an integer greater than or equal to 1;
and diffracting the N optical signals through N optical paths and then emitting the N optical signals so as to present N images corresponding to the N optical signals on different N focal planes.
In an embodiment of the second aspect of the present application, the diffracting red light in the first optical signal by the first optical path and emitting, diffracting green light in the first optical signal by the first optical path and emitting, diffracting blue light in the first optical signal by the first optical path and emitting, includes:
diffracting red light in the first light signal by a red light waveguide optic and then exiting the exit pupil grating, diffracting green light in the first light signal by a green light waveguide optic and then exiting the exit pupil grating, diffracting blue light in the first light signal by a blue light waveguide optic and then exiting the exit pupil grating, to present the first image to a human eye at a first focal plane;
the exit pupil gratings of the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens are all arc-shaped, and the focuses of the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens are all located in the first focal plane.
In an embodiment of the second aspect of the present application, the diffracting the white light in the second optical signal by the second optical path and then emitting the white light includes:
diffracting the white light in the second optical signal by a white light waveguide lens and then emitting the white light from an exit pupil grating;
the exit pupil grating of the white optical waveguide lens is arc-shaped, and the focus of the white optical waveguide lens is located in the second focal plane.
A third aspect of the present application provides an augmented reality device, comprising:
a sensor for acquiring a real scene image;
the display module according to any of the embodiments of the first aspect, wherein the display module is configured to image on at least two focal planes, and to be displayed to a user in an overlapping manner with the image of the real scene.
The present application fourth aspect provides a virtual reality device, including:
the display module according to any of the embodiments of the first aspect, wherein the display module is configured to image on at least two focal planes and present the image to a user;
and the processor is used for controlling a projection light machine in the display module to generate a first light signal representing a first image and a second light signal representing a second image.
Drawings
FIG. 1 is a schematic structural diagram of a display module according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a display module according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of a display module according to an embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of a display module according to an embodiment of the present disclosure;
FIG. 5A is a schematic view of a projection light engine according to an embodiment of the present application;
FIG. 5B is a schematic diagram of an embodiment of a projection optics of the display module of the present application;
FIGS. 5C-5F are schematic diagrams of the optical path structure in the projector of the display module of the present application;
FIG. 6 is a schematic diagram of an optical path of a projection engine according to the present application;
FIG. 7 is a schematic diagram of a light exit structure of a projection light engine according to the present application;
FIG. 8 is a schematic structural diagram of a display module according to an embodiment of the present disclosure;
FIG. 9 is a schematic structural diagram of a display module according to an embodiment of the present disclosure;
FIG. 10 is a schematic structural diagram of a non-optical field type optical waveguide lens;
FIG. 11 is a schematic view of a structure of an optical field type optical waveguide lens in a display module according to the present application;
FIG. 12 is a schematic view of a light-emitting structure of a white light waveguide lens in a display module of the present application;
FIG. 13 is a schematic structural diagram of an AR/VR display device according to an embodiment of the present application;
FIG. 14 is a schematic structural diagram of an AR/VR display device according to an embodiment of the present application;
FIG. 15 is a schematic structural diagram of an AR/VR display device in accordance with an embodiment of the present application;
FIG. 16 is a schematic structural diagram of an AR/VR display device in accordance with an embodiment of the present application;
FIG. 17 is a schematic structural diagram of an AR/VR display device in accordance with an embodiment of the present application;
FIG. 18 is a schematic flow chart diagram of an embodiment of an imaging method of the present application;
fig. 19 is a schematic structural diagram of an embodiment of an augmented reality device according to the present application;
fig. 20 is a schematic structural diagram of a virtual reality device according to an embodiment of the present application.
Detailed Description
Fig. 1 is a schematic structural diagram of a display module according to an embodiment of the present disclosure. As shown in fig. 1, the display module in this embodiment can be used in an AR display device or a VR display device to display images, and specifically, the display module in this embodiment includes: a red
The red
The at least one photo-
Meanwhile, the at least one projection
In summary, as shown in fig. 1, at least one of the
Fig. 2 is a schematic structural diagram of an embodiment of a display module according to the present application, and fig. 2 shows a possible implementation manner of a first
In particular, since the white light for representing the first picture may be composed of red, green and blue light, in the embodiment as shown in fig. 1, the at least one projection
Therefore, in the present embodiment, as shown in fig. 2, the first
Alternatively, since the red
Fig. 3 is a schematic structural diagram of an embodiment of a display module according to the present application, and the embodiment shown in fig. 3 illustrates that at least one projector includes one projector, that is, at least one projector in the above embodiments is the
Fig. 4 is a schematic structural diagram of an embodiment of a display module according to the present application, and the embodiment shown in fig. 4 shows that at least one of the projection
Specifically, the embodiment shown in fig. 4 can be based on the embodiment shown in fig. 1 or fig. 2, and the at least one projection
Further, this embodiment may also be applied to that when the FoV of the image formed by the optical
Fig. 5A is a schematic structural diagram of a projection light engine in the display module of the present application. Fig. 5A shows a structure of a
As shown in fig. 5A, the
Further, fig. 5B is a schematic structural diagram of an embodiment of a projection light engine in the display module of the present application. The structure shown in fig. 5B is the structure shown in fig. 5A, and further includes a white light source provided independently. That is, when the
Specifically, fig. 5C to 5F are schematic diagrams of the inner optical path structure of the projector in the display module of the present application. Fig. 5C independently shows the optical path of the light emitted by the single red light source in fig. 5A in the first projection
In addition, in order to realize the discrete exit pupil of the projector with more focal power images, more LED light sources can be arranged, and the color can be white, red, blue or green, so as to realize more emergent light paths of the projector. For example, the
Fig. 8 is a schematic structural diagram of an embodiment of a display module according to the present application. As shown in fig. 8, the display module of the present embodiment can provide a solution for achieving more focal length display based on the embodiments shown in fig. 1 or fig. 2.
Specifically, as shown in fig. 8, in this embodiment, on the basis of the embodiment shown in fig. 1 or fig. 2, N white light waveguide lenses are further included, where N is an integer greater than or equal to 1, that is, the display module further includes other white light waveguide lenses besides the white
For example, in the embodiment shown in fig. 8, it includes: in addition to the white
Further, assuming that the FoV of the optical
It should be noted that, as shown in fig. 8, which is only an example when N is 1, if more focal planes are needed to be added to the display module, new white
Fig. 9 is a schematic structural diagram of an embodiment of a display module according to the present application. The display module in the embodiment shown in fig. 9 is implemented by the embodiment shown in fig. 8 in a manner that at least one of the light projectors in the embodiment shown in fig. 4 includes a
Fig. 10 is a schematic structural diagram of a non-optical field type optical waveguide lens. A structure of a non-optical field type optical waveguide lens generally used in an optical waveguide lens used in a conventional display module is shown in fig. 10, and an
Therefore, in an embodiment of the present invention, an optical field type optical waveguide lens with optical power is provided, so that the red
Specifically, for the linear grating used in the optical waveguide lens as shown in fig. 10 as the coupling-out grating, the wave vector of the linear grating is a constant
For example: the light guide lens with the curved surface relief grating described above can be simulated by means of binary grating profiles in the optical simulation software Zemax or Fred. Wherein the binary grating surface type passes through a phase formula polynomial
Fig. 12 is a schematic view of a light-emitting structure of a white light waveguide lens in a display module according to the present application, further illustrating a possible light-emitting structure of the white light waveguide lens in the above embodiments.
Specifically, in the prior art, the exit pupil grating of the optical waveguide lens for diffracting white light all adopts a holographic grating, so that the FoV of the optical waveguide lens is narrow and has a certain wavelength selectivity. In the embodiments of the present application, the exit pupil grating of the white light waveguide lens uses a surface relief grating, so that the white light waveguide lens has improved FoV and no wavelength selectivity. As shown in fig. 8, when the white optical waveguide lens is realized by glass having a refractive index of 2.0, there is about 60 degrees with respect to the lateral FoV of the outgoing light after diffraction in the white optical waveguide lens of red light (wavelength 633nm), green light (wavelength 532nm), and blue light (455nm) incident on the white optical waveguide lens, and the outgoing light of each monochromatic light is not completely overlapped laterally. On the other hand, the white light waveguide lens has a lateral FoV of only 25 degrees when combined with the overlapping portion of the outgoing light diffracted by the red light, the green light, and the blue light.
Therefore, when the white optical waveguide lens using the surface relief grating in the present embodiment is applied to the embodiments shown in fig. 1 and fig. 2, it is able to display an image of a short-range view of a small FoV in the second focal plane when the red, green and blue optical waveguide lenses are responsible for displaying an image of a long-range view of a large FoV in the first focal plane, that is, the focal length of the first focal plane is greater than that of the second focal plane of the white optical waveguide lens. For example, when the display module needs to display content that a person walks to near from far, when the person is far, the image of the person generated by the projection optical machine at far is presented to the human eyes by the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens, and when the person walks to near, the image of the person generated by the projection optical machine at near is presented to the human eyes by the white light waveguide lens, and the distance is relative concept, and different focal planes can be set according to actual needs. Because human eyes are more sensitive to the visual experience of the central view field, the depth information and the resolution of the central view field of the human eyes can be enhanced through the image display close range of a small FoV, and therefore the visual effect of the human eyes can be further improved. And adopt the display module assembly of this embodiment display mode, through the red light waveguide lens that contains three lenses, green light waveguide lens and the big FoV image of blue light waveguide lens display, the white light waveguide lens of single lens shows little FoV's image alone, and the mode that the two combined together not only makes the display module assembly guarantee under the prerequisite of FoV maximize, compromise the display of big FoV, the high resolution of display content and comparatively simplify the structure of frivolous display module assembly.
FIG. 13 is a schematic structural diagram of an AR/VR display device according to an embodiment of the present application. The AR/VR display device as shown in FIG. 13 includes a display module as shown in any one of FIGS. 1-12. Specifically, as shown in fig. 13, the AR/VR display device includes the two display modules, which are respectively used for displaying AR/VR contents to the left eye and the right eye of the user. The AR/VR content may be the first image, the second image, and the third image described in the above embodiments. Further, the AR/VR display device further includes: a sensor, a processor, a memory, and a power source. The processor can be connected with a communication network through the network communication module, acquires images needing to be displayed from a server located at a user side or a network side through the communication network, and sends the acquired images to a projection light machine in the display module to be displayed. Or, when the storage of the AR/VR display device stores the image to be displayed, the processor may also directly send the image in the storage to the projector in the display module for displaying. FIG. 14 is a schematic structural diagram of an AR/VR display device according to an embodiment of the present application. Fig. 14 is a system circuit configuration diagram showing the AR/VR display apparatus shown in fig. 13. The processing unit is the processor in the above embodiment, the memory may be used to store images to be displayed, the network communication module is used to connect to a communication network, and the power supply is used to supply power to the modules in the whole AR/VR display device. The micro display circuit system is used for displaying an image to be displayed in a micro display of the projection light machine, and the display illumination driver is used for driving light emitted by an illumination unit of the projection light machine to obtain an optical signal for representing the image after the light passes through the micro display. The sensor unit is used for processing the dynamic information and the position information of the user acquired by the AR/VR display device so as to adjust the displayed image content according to the posture of the user. The embodiment shows only one implementation manner of the AR/VR display device, and the emphasis is that the AR/VR display device includes a display module. Reference may be made to the common general knowledge in the art of AR/VR applications where other modules in the AR/VR display device are not or not shown in their entirety, and the application is not limited thereto.
FIG. 15 is a schematic structural diagram of an AR/VR display device according to an embodiment of the present application. The application scenario shown in fig. 15 is that the AR/VR display apparatus shown in fig. 13 is applied to an AR/VR scenario interacting with a virtual object at a short distance, allowing images to be displayed at a close distance that can be touched by a human hand, and can be applied to a scenario in which a human interacts with a virtual object at a short distance. Specifically, the AR/VR display device may determine a position of a hand of the user through the gesture recognition and positioning system, and retrieve the virtual object to be displayed from the storage system, and the processor of the display device combines the acquired actual images with the pre-virtual object through an image algorithm, so as to obtain that the virtual object in the image to be displayed is located in the hand of the user, and send the image to be displayed to the display system for displaying, where the display system is the display module in the above embodiment. FIG. 16 is a schematic structural diagram of an AR/VR display device according to an embodiment of the present application. The application scenario of FIG. 16 is an AR/VR application in which the AR/VR display device of FIG. 13 is applied to a virtual game scenario. Specifically, the AR/VR display device retrieves a virtual object to be displayed from the storage system, determines the operation of the user on the virtual object through the gesture recognition and positioning system, combines the acquired actual images with the pre-virtual object through the image algorithm, obtains the virtual object in the image to be displayed, moves according to the operation of the user, and sends the image to be displayed to the display system for displaying, where the display system is the display module in the above embodiment. In addition, the image resource to be displayed in the network can be acquired through the wireless network and stored in the storage system for calling. FIG. 17 is a schematic structural diagram of an AR/VR display device according to an embodiment of the present application. The application scenario of FIG. 17 is an AR/VR scenario in which the AR/VR display device of FIG. 13 is applied to a 3D video conference. The equipment is used for collecting images and audios to be displayed through the microphone and the camera and sending the images and the audios to the storage system of the AR/VR display device through the wireless network, so that the images to be displayed are sent to the display system for displaying after being processed through an image algorithm by the AR/VR display device, the display system is the display module in the embodiment, and meanwhile the AR/VR display device also synchronously broadcasts the received audios and the images. It should be noted that the objects processed in the embodiments shown in fig. 15 to fig. 17 may be single images or video contents, and the video contents may be understood as continuous images, and for each single image in the continuous images, the manner and principle of processing the single image by the display module in the foregoing embodiments of the present application may be adopted.
Fig. 18 is a schematic flowchart of an embodiment of an imaging method according to the present application. The imaging method shown in fig. 18 can be used for the display module shown in fig. 1 to present images at the first focal plane or the second focal plane. The imaging method of the embodiment comprises the following steps:
s101: a first optical signal representing a first image and a second optical signal representing a second image are acquired.
S102: the red light in the first optical signal is diffracted by the first optical path and then emitted, the green light in the first optical signal is diffracted by the first optical path and then emitted, and the blue light in the first optical signal is diffracted by the first optical path and then emitted, so that a first image is presented on a first focal plane.
S103: and diffracting the white light in the second optical signal through a second optical path and then emitting the white light to present a second image on a second focal plane, wherein the second focal plane and the first focal plane are on different planes.
The sequence of S102 and S103 is not specifically limited, and in this embodiment, S102 may be executed after S103 is executed, or S102 and S103 may be executed simultaneously.
The imaging method shown in fig. 18 can be implemented in the display module shown in fig. 1, and the specific implementation manner and principle thereof are the same as those described in the embodiment of fig. 1, and are not described again.
Optionally, in the above embodiment, the first optical path includes: a red light path, a green light path, and a blue light path. S102 in the foregoing embodiment specifically includes: the red light in the first optical signal is diffracted by the red optical path and then emitted, the green light in the first optical signal is diffracted by the green optical path and then emitted, and the blue light in the first optical signal is diffracted by the blue optical path and then emitted.
Optionally, S101 in the above embodiment specifically includes: a first light signal representing a first image and a second light signal representing a second image are generated by a first light projector.
Optionally, in the above embodiment, S101 specifically includes: the red light source independently arranged by the first projection light machine generates red light, the green light source independently arranged by the first projection light machine generates green light, and the blue light source independently arranged by the first projection light machine generates blue light; the first light signal representing the first image comprises red light, green light, and blue light; and white light is generated by a white light source arranged on the first projector.
Optionally, S101 in the above embodiment specifically includes: a first light signal representing a first image is generated by a first light projector and a second light signal representing a second image is generated by a second light projector.
Optionally, S101 in the above embodiment specifically includes: the first light signal representing the first image comprises red light, green light and blue light; and white light is generated by a white light source arranged on the second projector.
Optionally, in the above embodiment, the method further includes: acquiring N optical signals, wherein the N optical signals carry different images, and N is an integer greater than or equal to 1; and the N optical signals are diffracted through the N optical paths and then emitted out, so that N images corresponding to the N optical signals are presented on different N focal planes.
Optionally, in the above embodiment, S102 specifically includes: the first image is presented at a first focal plane by diffracting red light in the first light signal by the red light waveguide mirror and exiting the exit pupil grating, diffracting green light in the first light signal by the green light waveguide mirror and exiting the exit pupil grating, and diffracting blue light in the first light signal by the blue light waveguide mirror and exiting the exit pupil grating. The exit pupil gratings of the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens are all arc-shaped, and the focuses of the red light waveguide lens, the green light waveguide lens and the blue light waveguide lens are all located in a first focal plane.
Optionally, in the above embodiment, S103 specifically includes: the white light in the second optical signal is diffracted by the white light waveguide lens and then emitted from the exit pupil grating. The exit pupil grating of the white light waveguide lens is arc-shaped, and the focus of the white light waveguide lens is positioned in the second focus plane.
The imaging method shown in each of the above embodiments can be implemented in the display module shown in the above embodiments, and the specific implementation manner and principle thereof are consistent with those described in the above embodiments, and will not be described again.
The present application further provides an apparatus comprising: a processor and a memory; the memory is used for storing programs; the processor is configured to call a program stored in the memory to perform the imaging method according to any one of the above embodiments.
The present application also provides a computer-readable storage medium having stored therein program code which, when executed, performs the imaging method as in any one of the above embodiments.
The present application also provides a computer program product comprising program code that, when executed by a processor, implements the imaging method as in any one of the above embodiments.
Fig. 19 is a schematic structural diagram of an embodiment of an augmented reality device according to the present application. As shown in fig. 19, the augmented reality device 19 provided in this embodiment includes: a sensor 1901 and a display module 1902. In some possible embodiments, a positioning device 1903 and a processor 1904 may also be included. The display module 1902 may be any one of the display modules described in the previous embodiments of the present application. The sensor 1901 is configured to obtain a real scene map where the augmented reality device 19 is located; the positioning device is used for determining the space position of the augmented reality device 19; the processor 1904 is configured to perform image processing according to the real scene image and the spatial position of the augmented reality device 19; the processed image is imaged on at least two focal planes through the display module 1902 and is displayed to the user in superposition with the real scene graph.
Fig. 20 is a schematic structural diagram of a virtual reality device according to an embodiment of the present application. As shown in fig. 20, the
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
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