CN210401842U - AR display system with adjustable view field - Google Patents

Abstract

The utility model discloses a visual field adjustable AR display system, including display device, waveguide lens and adjusting device, display device output image light extremely adjusting device, image light warp adjusting device adjusts the back, incides to the waveguide lens, warp again waveguide lens total reflection output to people's eye, adjusting device is used for adjusting image light output extremely the angle of waveguide lens, and then realize people's eye observes different visual fields. The angle of the image light output to the waveguide lens is adjusted through the adjusting device, so that different view field ranges can be observed by human eyes, flexible switching between large view field display and small view field display is achieved, and various scene requirements are met.

Description

AR display system with adjustable view field

Technical Field

The utility model relates to a AR shows technical field, especially relates to a visual field adjustable AR display system.

Background

The AR (Augmented Reality) technology is a new technology that integrates real world information and virtual world information "seamlessly", and not only displays the real world information, but also displays the virtual information at the same time, and the two kinds of information complement and overlap each other. In visual augmented reality, the user can see the real world around it by re-composing the real world with computer graphics using a head mounted display. For AR, since most of the visual fields of users present real scenes, how to recognize and understand real scenes and objects, and superimposing virtual objects into the real scenes, which are more real and reliable, becomes the primary task of AR-aware interaction. In addition, due to potential conflicts in the aspects of resolution (definition), field of view (also called field angle, referred to as field range), weight and volume (beautiful and comfortable) and the like, in addition to ensuring visual experience, how to meet the requirement that similar glasses are worn conveniently all day becomes a major technical challenge in the field of AR near-to-eye display.

Most of the current mainstream near-eye augmented reality display devices adopt the optical waveguide principle. For example, Hololens couples an image on LCOS to an optical waveguide through three holographic gratings, transmits the image through three optical waveguides, and finally couples and outputs the image through corresponding holographic gratings right in front of human eyes to project the image to the human eyes, and realizes color projection in a manner of multilayer optical waveguides. Lumus is designed by adopting an array grating waveguide, a semi-transparent and semi-reflective process is carried out on coupled light for several times, and transmitted light enters human eyes to realize augmented reality display. However, in some practical scene applications, the user needs to flexibly switch between the large-field display and the small-field display to meet various scene requirements.

The foregoing description is provided for general background information and is not admitted to be prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a visual field adjustable AR display system realizes the switching between big visual field demonstration and the little visual field demonstration to satisfy various scene demands.

The utility model provides a visual field adjustable AR display system, including display device, waveguide lens and adjusting device, display device output image light extremely adjusting device, image light warp adjusting device adjusts the back, incides to the waveguide lens, warp again waveguide lens total reflection output to people's eye, adjusting device is used for adjusting image light output extremely the angle of waveguide lens, and then realize people's eye observes different field of view scopes.

In one embodiment, the adjusting device comprises a plurality of axially arranged lenses, and controls the axial movement of one or more of the lenses.

In one embodiment, the lens is moved by a distance which does not enable the range of image light rays emitted by the previous lens to exceed the size of the incident light rays emitted by the moving lens; or the lens can not move for a distance which can enable the range of the image light rays emitted by the lens which is moved to exceed the size of the light rays incident on the latter lens.

In one embodiment, the adjusting device further includes an adjusting structure for driving the lenses to move axially, and the adjusting structure is connected to a plurality of lenses respectively.

In one embodiment, the waveguide lens includes an incoupling functional region, a turning functional region and an outcoupling functional region, which are sequentially passed by the image light, and the three functional regions are located on the same side surface of the waveguide lens.

In one embodiment, the waveguide lens is a color waveguide lens through which light rays including three color images of red, green and blue pass, and the light rays of the image of each color are diffracted and bent by each functional region and are emitted to human eyes through the waveguide lens, so that color augmented reality display is realized.

In one embodiment, each functional region is comprised of a nanostructured grating.

In one embodiment, the grating comprises a tilted grating or a rectangular grating or a blazed grating or a volume grating.

In one embodiment, the gratings of the functional regions are the same or different.

The utility model provides a visual field adjustable AR display system adjusts the angle of image light output to waveguide lens through adjusting device, realizes different field of view scopes are observed to the people's eye to realize the nimble switching between big visual field demonstration and the little visual field demonstration, in order to satisfy various scene demands.

Drawings

FIG. 1 is a schematic diagram of the transmission of image light before and after being adjusted by an adjusting device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the transmission of image light within a waveguide lens according to an embodiment of the present invention;

fig. 3 is a schematic diagram of image light transmission of an AR display system with an adjustable viewing field according to an embodiment of the present invention;

fig. 4 is a logic relationship diagram of the AR display system with adjustable view field according to the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Referring to fig. 1 to 2, an AR display system with adjustable viewing field provided in an embodiment of the present invention includes a display device 1, an adjusting device 2, and a waveguide lens 3. The display device 1 outputs image light to the adjusting device 2, the image light is adjusted by the adjusting device 2, then enters the waveguide lens 3, and is diffracted and totally reflected by the waveguide lens 3 and output to human eyes. The adjusting device 2 is used for adjusting the angle of the image light output to the waveguide lens 3, and then different view field ranges can be observed by human eyes.

The adjusting device 2 comprises a plurality of axially arranged lenses 21 and adjusting structures 23, and the adjusting structures 23 are respectively connected with the lenses 21 so that the adjusting structures 23 drive the lenses 21 to move axially. The adjusting structure 23 controls the axial movement of a certain lens 21 or a plurality of lenses 21 to realize the change of the range of the incident angle of the image light entering the waveguide lens 3, thereby realizing the change of the coupling-out angle of the image light passing through the waveguide lens 3.

In the present embodiment, the adjustment device is provided with 3 lenses 21 arranged axially at a distance.

In practical operation, the axial movement distance of the lens 21 cannot exceed a critical distance, so that all the image light rays emitted by the previous lens 21 can enter the moved lens 21; alternatively, the distance that the lens 21 is moved cannot exceed another critical distance, so that all the image light emitted from the moved lens 21 can enter the subsequent lens 21.

The waveguide lens 3 includes an incoupling functional area 31, a turning functional area 33, and an outcoupling functional area 35, which are sequentially passed by image light. As shown in fig. 2, the three functional areas are located on the same side surface of the waveguide lens 3.

In this embodiment, the field-of-view adjustable AR display system is provided with a piece of waveguide lens 3. The waveguide lens 3 is a color waveguide lens 3 through which the light rays of the red, green and blue images can pass, and the light rays of the images of all colors are diffracted and bent through all functional areas and are emitted to human eyes through the waveguide lens 3, so that the color augmented reality display is realized.

As shown in fig. 2, the image light is diffracted by the incoupling functional area 31 and enters the waveguide lens 3, and after being totally reflected in the waveguide lens 3, the image light enters the turning functional area 33, so that the light is bent and then is transmitted to the outcoupling functional area 33, and the light exits to human eyes through the outcoupling functional area 35.

Each functional area is composed of nano-structured gratings, and the gratings of each functional area are the same or different. In particular, the grating comprises a slanted grating or a rectangular grating or a blazed grating or a bulk grating.

When the device is used, according to image light rays output by the display device 1 observed by human eyes, a wearer determines the requirements of different scene view field ranges, the manual control adjusting structure 23 drives the lens 21 to axially move, the image light rays output by the display device 1 are adjusted by the lens 21 after being adjusted by the adjusting device 2, the angle of the image light rays output by the lens 21 is changed, the image light rays larger than or smaller than the initial angle are emitted to the waveguide lens 3, the image light rays are diffracted and totally reflected inside each functional area of the waveguide lens 3, the image light rays are emitted through the coupling-out functional area 35 and guided into human eyes, and therefore the final light ray output angle change is achieved. Therefore, the light rays with different incident angles are incident, the light rays with different emergent angles are emergent finally, and the function of adjusting the system view field is realized.

In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. It will be understood that when an element such as a layer, region or substrate is referred to as being "formed on," "disposed on" or "located on" another element, it can be directly on the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly formed on" or "directly disposed on" another element, there are no intervening elements present.

In this document, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms can be understood in a specific case to those of ordinary skill in the art.

In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the sake of clarity and convenience of description of the technical solutions, and thus, should not be construed as limiting the present invention.

As used herein, the meaning of "a plurality" or "a plurality" is two or more unless otherwise specified.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (9)

1. The AR display system with the adjustable view field is characterized by comprising a display device, a waveguide lens and an adjusting device, wherein the display device outputs image light to the adjusting device, the image light is adjusted by the adjusting device, then enters the waveguide lens and is output to human eyes through total reflection of the waveguide lens, and the adjusting device is used for adjusting the angle of the image light output to the waveguide lens, so that the human eyes can observe different view field ranges.

2. The field-of-view adjustable AR display system of claim 1, wherein said adjustment means comprises a plurality of axially arranged lenses, controlling axial movement of one or more of said lenses.

3. The field-of-view adjustable AR display system of claim 2, wherein said lenses are moved a distance that does not exceed a threshold distance, such that all of the image light rays exiting the previous said lens can enter the moved said lens; or all the image light rays emitted by the lens after moving can enter the latter lens.

4. The field-of-view adjustable AR display system of claim 2, wherein said adjustment means further comprises adjustment structures for driving said lenses to move axially, said adjustment structures being respectively coupled to a plurality of said lenses.

5. The field-of-view adjustable AR display system of claim 1, wherein said waveguide optic comprises an incoupling functional area, a turning functional area and an outcoupling functional area traversed in sequence by said image light, three functional areas being located on the same side surface of said waveguide optic.

6. The field-of-view adjustable AR display system of claim 5, wherein the waveguide lens is a color waveguide lens through which light rays comprising images of red, green and blue pass, and the light rays of the images of each color are diffracted and bent by each functional region and exit to human eyes through the waveguide lens, thereby realizing color augmented reality display.

7. The field-of-view adjustable AR display system of claim 5, wherein each functional region is comprised of a nanostructured grating.

8. The field-of-view adjustable AR display system of claim 7, where the grating comprises a tilted grating or a rectangular grating or a blazed grating or a volume grating.

9. The field-of-view adjustable AR display system of claim 7, wherein the gratings of the functional areas are the same or different.

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