CN109963145B - Visual display system and method and head-mounted display device - Google Patents
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
- H04N13/337—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using polarisation multiplexing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04N13/30—Image reproducers
- H04N13/346—Image reproducers using prisms or semi-transparent mirrors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/398—Synchronisation thereof; Control thereof
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- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/014—Head-up displays characterised by optical features comprising information/image processing systems
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- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
The application relates to a visual display system and a visual display method, and a head-mounted display device. The visual display system includes: the image source is a polarized stereoscopic display; an optical device disposed adjacent to the image source, enabling image content played by the image source to be imaged in the optical device; and a first polarizer and a second polarizer arranged in parallel, the first polarizer and the second polarizer being arranged opposite to the optical device, the first polarizer and the second polarizer having different polarization directions. Wherein the image source is configured to emit light polarized in a first direction to display first image content and emit light polarized in a second direction to display second image content; the first direction is the same as the polarization direction of the first polarizer and the second direction is the same as the polarization direction of the second polarizer. The visual display system controls the light path entering the eyes of the user by means of the first polaroid and the second polaroid, so that the angle of view can be increased when stereoscopic display is carried out, and the visual experience of the user is improved.
Description
Technical Field
The present application relates to the field of light field display, and in particular, to a visual display system and method applied to light field display, and a head-mounted display device.
Background
With the development of technology, machine intelligence and information intelligence are becoming popular, and technologies for identifying user images through visual devices such as machine vision or virtual vision to realize man-machine interaction are becoming important.
Head Mounted Displays (HMDs) have long proven to be very valuable for many applications, spanning the fields of scientific visualization, medical and military training, engineering and prototyping, remote manipulation and telepresence, and personal entertainment systems. In mixed reality and augmented reality systems, optically-see-through HMDs are one of the basic methods of combining computer-generated virtual scenes with views of real-world scenes. Computer-generated images are optically overlaid onto the real world view, typically by an optical combiner, an optical see-through head-mounted display (OST-HMD), while maintaining a direct minimally degraded view of the real world. Modern computing and display technologies have facilitated the development of systems for "Virtual Reality (VR)" or "Augmented Reality (AR)" experiences, in which digitally rendered images or portions thereof are presented to a user in a manner in which they appear to be authentic or can be considered authentic. Virtual reality or "VR" scenes typically involve the presentation of digital or virtual image information, while being opaque to other actual real world visual inputs; augmented reality or "AR" scenes generally involve the presentation of digital or virtual image information as an enhancement to the visualization of the real world around the user.
In most of the existing AR/VR display technologies, a display having two display surfaces is generally used for projection, the two display surfaces of the display are projected to an optical device at the same time, and a left eye image and a right eye image are respectively formed, and the left eye image and the right eye image imaged in the optical device are respectively projected to the left eye and the right eye of a user, so that binocular stereoscopic vision is formed. However, due to the limitation of physical structure, in the above-mentioned AR/VR display technology, a binocular stereoscopic vision effect needs to be formed, the angle of view (FIELDANGLE OF VIEW, FOV) is small, the field of view is approximately square, it is difficult to bring a better immersion feeling to the user, and the square field of view gives people a very narrow visual experience of a window, and the visual feeling is poor.
Content of the application
An objective of an embodiment of the present application is to provide a visual display system and a method with a larger field angle, which are used for solving the above technical problems. It is also necessary to provide a head-mounted display device to which the above visual display system is applied.
The embodiment of the application provides a visual display system which is applied to AR/VR field display. The visual display system includes: the image source is a polarized stereoscopic display; an optical device disposed adjacent to the image source such that image content played by the image source is capable of being imaged in the optical device; and a first polarizing plate and a second polarizing plate arranged in parallel, wherein the first polarizing plate and the second polarizing plate are arranged opposite to the optical device, and the polarization directions of the first polarizing plate and the second polarizing plate are different. Wherein the image source is configured to emit light polarized in a first direction to display first image content while emitting light polarized in a second direction to display second image content; the first direction is the same as the polarization direction of the first polarizer, and the second direction is the same as the polarization direction of the second polarizer.
Wherein in some embodiments, the polarization directions of the first and second polarizers are orthogonal to each other.
Wherein in some embodiments, the optical device is a single concave mirror, the concave curved surface of the optical device being disposed towards the first polarizer and the second polarizer.
In some embodiments, the optical device includes two focal points, and the two focal points are respectively offset to two sides of the optical device relative to a geometric center of the optical device and respectively correspond to the first polarizer and the second polarizer.
Wherein in some embodiments the optic is a concave mirror that both reflects light and transmits light, the image source being disposed toward the concave curved surface of the optic.
In some embodiments, the concave curved surface of the optical device includes a plurality of micro-structure curved surfaces, the curvatures of the micro-structure curved surfaces are the same, and the micro-structure curved surfaces are closely arranged.
Wherein in some embodiments, the visual display system further comprises an adjustment mechanism coupled to the image source, the adjustment mechanism for adjusting a distance between the image source and the optics.
Wherein in some embodiments, the visual display system further comprises a zoom mechanism disposed between the image source and the optics.
The embodiment of the application also provides a head-mounted display device, which comprises a glasses body, a wearing fixing piece connected to the glasses body, and the visual display system of any one of the above, wherein the visual display system is arranged on the head-mounted display device, the optical device is arranged on the glasses body and used as a lens display of the head-mounted display device, and the image source, the first polaroid and the second polaroid are connected to the glasses body.
The embodiment of the application also provides a head-wearing display device, which comprises a glasses body and a wearing fixing piece connected to the glasses body, and further comprises: the image source interface is used for installing a polarized stereoscopic display; an optical device disposed adjacent to the image source interface to enable image content played by the polarized stereoscopic display to be imaged in the optical device; and a first polarizing plate and a second polarizing plate arranged in parallel, wherein the first polarizing plate and the second polarizing plate are arranged opposite to the optical device, and the polarization directions of the first polarizing plate and the second polarizing plate are different. The polarized stereoscopic display is used for emitting light polarized along a first direction to display first image content and emitting light polarized along a second direction to display second image content; the first direction is the same as the polarization direction of the first polarizer, and the second direction is the same as the polarization direction of the second polarizer.
The embodiment of the application also provides a visual display method applied to AR light field display, comprising the following steps: providing an optical device and an image source, enabling the image source to project image content to be played to the optical device, wherein the image source is a polarized stereoscopic display; providing a first polarizer and a second polarizer which are arranged in parallel, wherein the first polarizer and the second polarizer are arranged opposite to the optical device, and the polarization directions of the first polarizer and the second polarizer are different; and controlling the image source to emit light polarized in a first direction to display first image content while emitting light polarized in a second direction to display second image content; wherein the first direction is the same as the polarization direction of the first polarizer and the second direction is the same as the polarization direction of the second polarizer.
In some embodiments, before the image source plays the first image content and the second image content, distortion correction is performed on the first image content and the second image content to be played.
Wherein, in some embodiments, before the image source plays the first image content and the second image content, the method further comprises: acquiring optical parameters of the optical device; according to the optical parameters, calculating a first forward mapping relation and a first reverse mapping relation between distortion of first image content observed by a user and the first image content to be played; calculating a second forward mapping relation and a second reverse mapping relation between the distortion of the second image content observed by the user and the second image content to be played according to the optical parameters; and rendering the first image content to be played by using the first reverse mapping relation, and rendering the second image content to be played by using the second direction mapping relation.
Compared with the prior art, the first polaroid and the second polaroid are adopted in the visual display system provided by the embodiment of the application to control the light channel entering the eyes of the user, so that the left eye and the right eye of the user can respectively see the first image content and the second image content, the image source does not need to be divided into the left eye image part and the right eye image part, the optical device does not need to be divided into the left eye display part and the right eye display part, the image source can display the first image content and the second image content in a full screen manner, the field angle of the visual display system is enlarged, the visual display system can have a larger depth of field, and the visual experience of the user is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a visual display system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of another view of the visual display system shown in FIG. 1;
FIG. 3 is a schematic diagram of the imaging principles of the visual display system shown in FIG. 1;
FIG. 4 is a schematic cross-sectional view of the optics of the visual display system shown in FIG. 1;
FIG. 5 is a schematic view of the concave curved surface of the optic of the visual display system of FIG. 1;
FIG. 6 is a schematic view of an imaging optical path of optics of the visual display system shown in FIG. 1;
FIG. 7 is a schematic diagram of a visual display system provided in accordance with another embodiment of the present application;
FIG. 8 is a schematic diagram of a visual display system provided by yet another embodiment of the present application;
FIG. 9 is a schematic diagram of a visual display system provided in accordance with yet another embodiment of the present application;
FIG. 10 is a schematic diagram of a visual display system provided by yet another embodiment of the present application;
fig. 11 is a schematic diagram of a head-mounted display device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, embodiments of the present application provide a visual display system 100, methods, systems and articles of manufacture for stereoscopic vision for virtual reality and/or augmented reality, particularly for virtual reality, augmented reality applications, and other applications such as near-eye display, computing and display applications, or even plain text display, among others.
In particular, in the embodiment shown in fig. 1, the visual display system 100 includes an image source 10, optics 30, and a polarizing module 50. The optics 30 are disposed adjacent the image source 10 and the polarizing module 50 is disposed opposite the optics 30.
When the visual display system 100 works, the image source 10 plays the image content to be played, and the image content to be played can be projected onto the optical device 30 and imaged on the optical device 30, so that a user can view the image content reflected by the optical device 30 via the polarization module 50 to establish a light field display. Further, the polarization module 50 is disposed between the eyes of the user and the optical device 30.
In this embodiment, the image source 10 is a three-dimensional stereoscopic display. Further, the image source 10 is a polarized stereoscopic display, i.e. in the form of a passive stereoscopic display, without strobe, and reduces fatigue of the operator for long-time viewing with glasses. The image source 10 is configured to display polarized light at different angles on different pixel columns, so that only light having the same polarization direction as that of the polarization module 50 can enter the human eye, and finally, the left eye and the right eye of the user can receive different images, thereby forming three-dimensional stereoscopic vision. It will be appreciated that in other embodiments, the image source 10 may include a polarized stereoscopic display screen for displaying polarized light at different angles on different columns of pixels.
Referring to fig. 2, in some embodiments, the polarizing module 50 is a pair of polarizing glasses, and the polarizing module 50 includes a first polarizing plate 52 and a second polarizing plate 54, where the first polarizing plate 52 and the second polarizing plate 54 are disposed in parallel and are used for corresponding to the left eye and the right eye of the user, respectively. The polarization direction of the first polarizer 52 is different from the polarization direction of the second polarizer 56. Further, the polarization direction of the first polarizing plate 52 and the polarization direction of the second polarizing plate 56 are orthogonal to each other.
When the image source 10 plays image content, light polarized in a first direction is emitted to display first image content, while light polarized in a second direction is emitted to display second image content, wherein the first direction is the same as the polarization direction of the first polarizer 52 and the second direction is the same as the polarization direction of the second polarizer 54. Thus, when the first image content played by the image source 10 is imaged in the optical device 30, the light reflected by the optical device 30 cannot pass through the second polarizer 54, but is projected into the left eye of the user via the first polarizer 52. When the second image content played by the image source 10 is imaged in the optical device 30, the light reflected by the optical device 30 cannot pass through the first polarizer 52, but is projected into the user's right eye via the second polarizer 54. Accordingly, when the user views an image through the visual reality system 100, the first image content and the second image content seen by both eyes of the user are superimposed on each other in the brain, thereby enabling the user to see a stereoscopic image.
Referring to fig. 3, in one specific embodiment, the polarization direction of the first polarizer 52 is 45 °, the polarization direction of the second polarizer 54 is 135 °, and the image content played in the image source 10 forms the virtual image 13 in the optical device 30, wherein the light of the first image content 131 is polarized along a first direction, and the first direction is the same as the polarization direction of the first polarizer 52; and light of the second image content 133 is polarized in a second direction that is the same as the polarization direction of the second polarizer 54. The light of the first image content 131 and the light of the second image content 133 reach the polarizing module 50 at the same time. The first image content 131 polarized in the first direction is able to pass through the first polarizer 52 to the left eye of the user and is unable to pass through the second polarizer 54 due to the blocking of the first polarizer 52 and the second polarizer 54; similarly, the second image content 133 polarized in the second direction is able to pass through the second polarizer 54 to the right eye of the user, but is unable to pass through the first polarizer 52. The first image content 131 and the second image content 133 are superimposed in the brain of the user to form a stereoscopic display image.
It is understood that in other embodiments, the structure of the polarizing module 50 is not limited to a polarized glasses structure. For example, in some embodiments, the polarizing module 50 may be a baffle structure and include the first polarizing plate 52 and the second polarizing plate 54 without having a frame and a temple of conventional glasses.
Because the visual display system 100 adopts a polarized stereoscopic display as the image source 10, and adopts the first polarizer 52 and the second polarizer 54 to control the light path entering the eyes of the user, so that the left eye and the right eye of the user can see the first image content and the second image content respectively, the image source 10 does not need to be divided into a left eye image portion and a right eye image portion, the optical device 30 does not need to be divided into a left eye display portion and a right eye display portion, so that the image source 10 can display the first image content and the second image content in a full screen manner, the viewing angle of the visual display system 100 is enlarged, the visual display system 100 can have a larger depth of field, and the visual experience of the user is improved. Meanwhile, since the image source 10 does not need to be divided into a left eye image portion and a right eye image portion, the optical device 30 does not need to be divided into a left eye display portion and a right eye display portion, and the user does not have vertical stripes for blocking the line of sight when watching, so that the visual experience of the user is further improved.
In some embodiments, the image source 10 may include any type of self-emissive or illuminating pixel array for playing video, for example, the image source may include, but is not limited to, a liquid crystal on silicon (LCoS) display device, a Liquid Crystal Display (LCD) panel, an Organic Light Emitting Display (OLED), a ferroelectric liquid crystal on silicon (FLCoS) device, a Digital Mirror Device (DMD), a micro-projector or micro-projector based on the foregoing, a projector beam such as a laser projector or a fiber-optic scanner beam, or any other suitable type of micro-display device, and may be capable of emitting polarized light at different angles to form the first and second image content described above.
It will be appreciated that in other embodiments, the optical display system 100 may not include the image source 10, but instead may be provided by a user as the image source 10. At this time, the optical display system 100 may include an image source interface, and the image source 10 is a display connected to the image source interface. In a specific embodiment, the image source interface is used to install and connect with the image source 10 (or the external image source 10) provided by the user.
The optics 30 are used to present the image content played by the image source 10. In this embodiment, the optical device 30 is a concave mirror, and the concave curved surface 32 thereof is disposed towards the polarizing module 50. Further, the optical device 30 is a single concave mirror.
Further, referring to fig. 5, the concave curved surface 32 of the optical device 30 includes a plurality of micro-structural curved surfaces 321, and the micro-structural curved surfaces 321 are invisible to the naked eye. In this embodiment, the curvatures of the micro-structure cambered surfaces 321 are the same, and the micro-structure cambered surfaces 321 are closely arranged, so that the focal point of the optical device 30 may be an eccentric focal point.
Further, the focal point of the optical device 30 is an off-center focal point, i.e. the focal point of the optical device 30 is offset with respect to the geometric center of the optical device 30. Referring to fig. 6, in some embodiments, the optical device 30 has two focuses, and the two focuses of the optical device 30 are respectively offset towards two opposite sides thereof, so that the two focuses are respectively adapted to the left eye and the right eye of the user, and thus the image seen by the user from the optical device 30 is in the middle portion, so as to further improve the visual effect of the visual display system 100.
Further, in particular in the embodiment shown in fig. 5, the optical device 30 has a first focus F1 and a second focus F2. The first focus F1 and the second focus F2 are offset towards opposite sides of the optical device 30, respectively, with respect to the geometrical center of the optical device 30. The image content in the image source 10 forms a virtual image 13 in the optics 30, enabling a user to view the virtual image 13 through the polarizing module 50. Since the focal point of the optical device 30 is an eccentric focal point, the left eye image content seen by the left eye of the user can be located at the center of the left eye field of view of the user, that is, the optical path L11 from the left edge of the virtual image 13 to the left eye of the user is equal to the optical path L12 from the right edge of the virtual image 13 to the left eye of the user; likewise, the right eye image content seen by the right eye of the user can be located in the center of its right eye field of view, i.e., the optical path L21 from the left edge of the virtual image 13 to the right eye of the user is equal to the optical path L22 from the right edge of the virtual image 13 to the right eye of the user. Thus, the user, whether viewing for the left or right eye, sees an image from the optic 30 that is centered in the field of view, enabling the user to obtain a good visual experience.
When the visual display system 100 described above is applied to a near-eye display, such as a head-mounted display device (fig. 11), the focal length of the optics 30 may be small. For example, the focal length of the optic 30 may be greater than or equal to 1 centimeter. At this time, the distance between the polarizing module 50 and the human eye may be as small as possible, so as to better block the line of sight of the user and ensure that the visual display system 100 has as large an angle of view as possible, so that the left eye of the user only sees the first image content and the right eye only sees the second image content, thereby improving the display effect of the visual display system 100. For example, the distance between the polarizing module 50 and the human eye may be less than or equal to 5 cm. When the visual display system 100 is applied to a normal AR light field display, or a naked eye 3D display, the focal length of the optical device 30 may be relatively large, for example, the focal length of the optical device 30 may range from one centimeter to several meters. It will be appreciated that the focal length range of the optical device 30 may be set according to practical requirements, and is not limited to that described in the present specification.
Further, the optical device 30 is a transflective concave mirror capable of reflecting light and transmitting light, so that the image content played by the image source 10 can form a virtual image in the optical device 30, and a user can observe the real environment in front through the optical device 30, so that the played content on the optical device 30 can be fused and superimposed with the real environment more naturally.
Further, when the optical device 30 is a transflective concave mirror capable of reflecting light and transmitting light, the transmittance of the optical device for light ranges from: more than 0% and less than 100%, and is specifically designed according to actual requirements.
Referring also to fig. 4, in some embodiments, the optical device 30 includes a lens body 34 and a transflective film layer 36. The transparent and reflective film 36 is disposed on the lens body 34 and faces the polarizing module 50, so that the image content played in the image source 10 can be directly reflected by the transparent and reflective film 36 and enter the eyes of the user, thereby avoiding the influence of the thickness of the optical device 30 on the refraction of light, and being beneficial to improving the display effect of the visual display system 100.
In some embodiments, the transflective film layer 36 may be a reflective film or a thin reflective film. When the transflective film layer 36 is a thin reflective film, the thin reflective film is a nano-sized thickness film having a thickness of about several tens nanometers to hundred nanometers. It will be appreciated that the transflective film layer 36 may cover a portion of the area of the lens body 34 or may cover the entire surface of the lens body 34. It will be appreciated that in some embodiments, the transflective film layer 36 may also be disposed on the side of the lens body 34 facing away from the noted side.
Compared to the prior art, the visual display system 100 provided in the embodiment of the present application adopts the first polarizer 52 and the second polarizer 54 to control the light path entering the eyes of the user, so that the left eye and the right eye of the user can respectively see the first image content and the second image content, the image source 10 does not need to be divided into a left eye image portion and a right eye image portion, the optical device 30 does not need to be divided into a left eye display portion and a right eye display portion, the image source 10 can display the first image content and the second image content in a full screen manner, the viewing angle of the visual display system 100 is enlarged, the visual display system 100 can have a larger depth of field, and the visual experience of the user is improved.
It will be appreciated that in a specific embodiment, the specific placement of the image source 10 is not limited, but the image source 10 and the polarizing module 50 are located on the same side of the optical device 30, so that a user can observe a virtual image of the image content played in the image source 10 in the optical device 30 through the polarizing module 50. It will also be appreciated that in other embodiments, the optic 30 may be a structure other than a concave mirror, such as a flat mirror, a convex lens, or the like. Even further, in some embodiments, the image source 10 and the polarizing module 50 may be located on different sides of the optical device 30, so that the user can observe the image content played in the image source 10 in the optical device 30 through the polarizing plate 30.
For example, referring to fig. 1 again, the optical device 30 is a concave mirror, the display screen 11 of the image source 10 is disposed towards the concave curved surface 32 of the optical device 30, and the polarizing module 50 and the image source 10 are located on the same side of the optical device 30. Further, the display screen 11 of the image source 10 is arranged substantially perpendicular to the optical axis 31 of the optical device 30.
For another example, referring to fig. 7, the optical device 30 is a concave mirror, the display 11 of the image source 10 is disposed towards the optical axis 31 of the optical device 30, the image content played by the image source 10 is reflected into the optical device 30 by a reflecting member 12, and the polarizing module 50 and the image source 10 are located on the same side of the optical device 30. Further, the display screen 11 of the image source 10 is arranged substantially parallel to the optical axis 31 of the optical device 30.
For another example, referring to fig. 8, the optical device 30 is a concave mirror, the display screen 11 of the image source 10 is disposed away from the optical axis 31 of the optical device 30, the image content played by the image source 10 is reflected into the optical device 30 by a reflecting element 14, and the polarizing module 50 and the image source 10 are located on the same side of the optical device 30.
For another example, referring to fig. 9, the optical device 30 is a plane mirror, the display 11 of the image source 10 is disposed towards the optical device 30, the image content played by the image source 10 is projected into the optical device 30 via a convex lens 16, and the polarizing module 50 and the image source 10 are located on substantially the same side of the optical device 30.
For another example, referring to fig. 10, the optical device 30 is a concave lens, the display screen 11 of the image source 10 is disposed towards the optical device 30, and the polarizing module 50 and the image source 10 are respectively located at two sides of the optical device 30, so that the optical device 30 is located between the image source 10 and the polarizing module 50. The image content played by the image source 10 is projected to the human eye through the optical device 30 and the polarization module 50. Further, the image source 10, the optical device 30 and the polarizing module 50 are sequentially disposed along the optical axis of the optical device 30. At this time, the visual display system 100 may be applied to a VR display device.
It should be appreciated that the visual display system 100 provided in the embodiment of the present application may be applied to a method, a system and a product for stereoscopic vision of virtual reality and/or augmented reality, and may also be applied to technologies such as naked eye 3D display, AR light field display, near-eye display, and the like.
For example, in some embodiments, the visual display system 100 may be applied to AR light field display, the optics 30 may be used as a translucent display screen, the image source 10 may be used as a player, and the polarizing module 50 may be used as polarized glasses suitable for wearing by a user.
Further, to facilitate controlling the imaging of the play content in the optical device 30, the visual display system 100 may further comprise an adjustment mechanism (not shown in the figure) for adjusting the object distance of the image source 10 in front of the optical device 30 and adjusting the imaging depth of the play content. Specifically, the adjustment mechanism is coupled to the image source 10, which may be an electric motor mechanism or other suitable mechanism. Further, in order to facilitate adjusting parameters such as the imaging size or definition, depth/distance of the imaging plane, etc. of the playing content in the optical device 30, the visual display system 100 may further include a zooming mechanism (not shown in the figure). The zoom mechanism may be disposed between the image source 10 and the optics 30. Specifically, the zooming mechanism may be a manual zooming mechanism or an electric zooming mechanism, and the zooming mechanism may generally include a lens assembly, which is not described in detail in this specification.
As another example, in some other embodiments, the visual display system 100 may be applied to a near-eye display, such as in the head-mounted display device 200 shown in fig. 11.
Meanwhile, the embodiment of the application further provides a head-mounted display device 200, referring to fig. 1 and 11, the head-mounted display device 200 includes a glasses body 201 and a wearing fixing member 203 connected to the glasses body 201, and in this embodiment, the wearing fixing member 203 is an adjustable elastic belt. The visual display system 100 is disposed in the head-mounted display device 200, specifically, the optical device 30 is disposed in front of the glasses body 201 and is used as a lens display of the head-mounted display device 200, and the image source 10 and the polarization module 50 are connected to the glasses body 201 or disposed in the glasses body 201.
In this embodiment, in order to facilitate adjusting parameters such as the imaging size or definition, the depth/distance of the imaging plane, etc. of the playing content in the optical device 30, the visual display system 100 may further include a zooming mechanism (not shown in the figure). The zoom mechanism is disposed within the eyeglass body 201 and may be located between the image source 10 and the optics 30. Specifically, the zooming mechanism may be a manual zooming mechanism or an electric zooming mechanism, and the zooming mechanism may generally include a lens assembly, which is not described in detail in this specification.
Further, the head-mounted display device 200 further includes a controller 205 disposed on the glasses body 201. The controller 205 is disposed at a side of the glasses body 201, and is used for controlling the visual display system 100 and providing an operation portion for a user to operate the head-mounted display device 200. In some embodiments, the controller 205 may include an operation panel 2051 and a display panel 2053, where the operation panel 2051 may be a key panel for controlling play content, imaging depth, display color, display brightness, play volume, and the like, and accordingly, the operation panel 2051 may include a play content selection key, an imaging depth adjustment key, a display color adjustment key, a display brightness adjustment key, a volume adjustment key. The display panel 2053 is configured to display a current state of the head mounted display device 200, such as a playing content, an imaging depth, a display color, a display brightness, or/and a current time, a current power, a current volume, or the like.
It will be appreciated that in other embodiments, the optical display system 100 may not include the image source 10 in the head mounted display apparatus 200, but an image source (e.g., a smart play device such as a cell phone, etc.) provided by a user may be used as the image source 10. At this time, the optical display system 100 includes an image source interface 90, and the image source interface 90 is used to install and connect with the image source 10 provided by the user. In use, a user inserts his own image source 10 directly onto the image source interface 90 for use.
Further, the head-mounted display device 200 further includes an image generation processor (not shown in the figure), which is built in the controller 205 and is used for controlling the playing content of the optical display system 100. In particular, in some embodiments, the image generation processor is capable of converting images or video associated with the play content into a format that can be projected onto the optical device 30. For example, in generating 3D content, the play content may need to be formatted such that a portion of a particular image is displayed on a particular depth plane and other portions are displayed at other depth planes (i.e., controlling imaging depth of different portions in the same image); or all images may be generated at a particular depth plane; or the image generation processor may be configured to present slightly different images to the left and right eyes of the user, respectively, so as to generate the first image content and the second image content, so that when the two eyes of the user observe together, the playing content is coherent and comfortable, and can also present more realistic stereoscopic images; or the image generation processor may be configured to correct distortion of the image content to be played to enhance the stereoscopic effect of the visual display system 100.
Further, the image generation processor may further include a memory, a CPU (central processing unit), a GPU (graphics processing unit), and other circuits for image generation and processing. The image generation processor may be programmed with the desired play content to be presented to a user of the virtual reality or augmented reality system.
In addition, the embodiment of the application also provides a visual display method which can be applied to any one of the visual display systems in the embodiment or/and the head-mounted display device. The visual display system comprises an image source, an optical device and a polarization module, wherein the polarization module comprises a first polarizer and a second polarizer which are arranged in parallel. The image source is used for projecting image content to be played to the optical device, the polarization module is arranged on the imaging side of the optical device, and the first polaroid and the second polaroid are respectively used for corresponding to the left eye and the right eye of a user. The visual display method comprises the following steps:
Step S101: and providing an optical device, and setting a preset included angle between the optical axis of the optical device and the sight line of a user.
Further, the range of the first preset included angle is as follows: greater than 0 degrees and less than 90 degrees. Wherein, in some embodiments, the optical device is a transflective concave mirror that can reflect light and transmit light, and the transmittance of the optical device for light ranges from: greater than 0% and less than 100%. The optical device comprises a lens body and a transflective film layer, wherein the transflective film layer is arranged on one side of a concave curved surface of the lens body.
Step S103: providing an image source, enabling a display screen of the image source to project image content to be played to the optical device.
Further, when the image source is set, a display screen of the image source is set toward the optical device. Wherein in some embodiments, the display screen of the image source is disposed toward a concave curved surface of the optical device having the transflective film layer thereon.
In this embodiment, the image source is a three-dimensional stereoscopic display. Furthermore, the image source is a polarized stereoscopic display, namely a passive stereoscopic mode, no stroboscopic effect exists, and the fatigue of long-time watching of the glasses of an operator is reduced. The image source can display polarized light with different angles on different pixel columns, so that only light with the same polarization direction as that of the polarization module can enter human eyes, and finally, the left eye and the right eye of a user can receive different images, thereby forming three-dimensional stereoscopic vision.
Step S105: providing a polarization module, and enabling the polarization module to be arranged on the imaging side of the optical device.
The polarizing module comprises a first polarizing plate and a second polarizing plate, wherein the first polarizing plate and the second polarizing plate are arranged in parallel, and the first polarizing plate and the second polarizing plate are arranged opposite to the optical device. The first polarizer is used for the left eye of the corresponding user, and the second polarizer is used for the right eye of the corresponding user. Further, when the polarizing module is set, the polarizing module is located between the optical device and the eyes of the user, the first polarizing plate corresponds to the left eye of the user, and the second polarizing plate corresponds to the right eye of the user. The polarization direction of the first polarizer is different from the polarization direction of the second polarizer. Further, the polarization direction of the first polarizer and the polarization direction of the second polarizer are orthogonal to each other.
Step S107: the image source is controlled to emit light polarized in a first direction to display first image content while emitting light polarized in a second direction to display second image content.
Further, when the image source plays the image content, light polarized in a first direction is emitted to display the first image content, and light polarized in a second direction is emitted to display the second image content, wherein the first direction is the same as the polarization direction of the first polarizer, and the second direction is the same as the polarization direction of the second polarizer.
In some embodiments, before the image source plays the image content, distortion correction is performed on the image content, so as to avoid distortion of the edges of the image content seen when the user observes the corresponding image content by a single eye, and thereby eliminate or/and reduce the ghost phenomenon of the edges of the image content finally seen by the user. Specifically, when the image content is subjected to distortion correction, the image content to be played is subjected to anti-distortion treatment respectively, so that when a user observes the corresponding image content in a single eye, the observed image content is a horizontal and vertical picture, thereby eliminating the ghost image finally imaged in human eyes and improving the stereoscopic display effect of the image. The above distortion correction may include the steps of:
Step S1072: acquiring optical parameters of the optical device, and calculating a first forward mapping relation between distortion of first image content observed by the left eye of a user and original first image content according to the optical parameters;
in some embodiments, the optical parameter is a focal parameter of the optical device. It will be appreciated that in other embodiments, the optical parameter may be a curvature parameter or/and a focus parameter of the optical device, etc.;
Step S1073: calculating a first inverse mapping relation of distortion of original first image content and first image content observed by left eyes of a user;
Step S1074: simulating the first forward mapping relation and the first reverse mapping relation by using a function; observing the distortion degree of the first image content observed by the left eye of the simulated user relative to the original first image content, if the distortion degree is within the error allowable range, confirming a first forward mapping relation and a first reverse mapping relation, and if the distortion degree is not within the error allowable range, recalculating the first forward mapping relation and the first reverse mapping relation;
Step S1075: confirming a second mapping relation between the distortion of the second image content observed by the right eye of the user and the original second image content according to the optical parameters;
Step S1076: calculating a second inverse mapping relation of distortion of the original second image content and the second image content observed by the right eye of the user;
step S1077: simulating the second forward mapping relation and the second reverse mapping relation by using a function; observing the distortion degree of the second image content observed by the right eye of the simulated user relative to the original second image content, if the distortion degree is within the error allowable range, confirming a second forward mapping relation and a second reverse mapping relation, and if the distortion degree is not within the error allowable range, recalculating the second forward mapping relation and the second reverse mapping relation; and
Step S1078: and rendering the first image content to be played by using the first reverse mapping relation, and rendering the second image content to be played by using the second direction mapping relation.
Further, when the image source is operated, the first image content played by the image source is imaged in the optical device, and the light reflected by the optical device cannot pass through the second polarizer, but is projected into the left eye of the user via the first polarizer. When the second image content played by the image source is imaged in the optical device, the light reflected by the optical device cannot pass through the first polarizer, but is projected into the right eye of the user via the second polarizer. Accordingly, when a user views an image through the visual reality system, the first image content and the second image content seen by both eyes of the user are superimposed on each other in the brain, thereby enabling the user to see a stereoscopic image.
In the visual display system 100 provided by the application, the first polarizer 52 and the second polarizer 54 are adopted to control the light path entering the eyes of the user, so that the visual display system can be applied to a method, a system and a product for virtual reality and/or augmented reality stereoscopic vision, and can also be applied to technologies such as naked eye 3D display, AR light field display, near-eye display and the like. Because the image source 10 can display the first image content and the second image content simultaneously in full screen, and a single concave mirror is used as the optical device 30, the visual display system 100 has a larger viewing angle and depth of field range, and the visual effect presented by the visual display system is relatively good.
Meanwhile, as the optical device 30 is adopted as the imaging element, the image content played by the image source 10 can be imaged in the optical device 30, and the image distance can reach beyond one meter or more meters, so that a user does not need to fixedly watch a traditional 3D display screen in a short distance, the eyestrain of the user can be effectively relieved, and the user experience is improved.
Further, the head-mounted display device 100 is used for being worn on the head of the user, and the position of the eyes of the user is always approximately fixed relative to the visual reality system 100 no matter what posture the user takes, and no matter where the user is, so that the stereoscopic effect presented by the visual display system 100 is well ensured, thereby avoiding the inconvenience that the user needs to sit/stand at a fixed position in the conventional 3D display.
Further, the visual display system 100 described above can be applied to the AR field, allowing the user to use with the head tracker, which is advantageous for realizing more realistic stereoscopic effect.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (6)
1. A visual display system for use with an AR/VR headset, the visual display system comprising:
The image source is a polarized stereoscopic display;
An optical device arranged adjacent to the image source, so that image content played by the image source can be imaged in the optical device, wherein the optical device is a single concave mirror; and
The first polaroid and the second polaroid are arranged in parallel, the first polaroid and the second polaroid are arranged opposite to the optical device, the polarization directions of the first polaroid and the second polaroid are different, the optical device comprises two focuses, and the two focuses are respectively arranged in an offset manner towards two sides of the optical device relative to the geometric center of the optical device and are respectively corresponding to the first polaroid and the second polaroid;
The image source is used for carrying out anti-distortion processing on the first image content and the second image content to be played, emitting light polarized along a first direction to display the first image content after the anti-distortion processing, and emitting light polarized along a second direction to display the second image content after the anti-distortion processing; the first direction is the same as the polarization direction of the first polaroid, and the second direction is the same as the polarization direction of the second polaroid;
The performing the anti-distortion processing on the first image content and the second image content to be played includes:
acquiring optical parameters of the optical device;
According to the optical parameters, calculating a first forward mapping relation and a first reverse mapping relation between distorted first image content observed by a user and original first image content;
Simulating the distortion degree of the distorted first image content observed by the user relative to the original first image content based on the first forward mapping relation and the first reverse mapping relation, and if the distortion degree is not within the error allowable range, recalculating the first forward mapping relation and the first reverse mapping relation;
calculating a second forward mapping relation and a second reverse mapping relation between distorted second image content observed by a user and original second image content according to the optical parameters;
Simulating the distortion degree of distorted second image content observed by a user relative to original second image content based on the second forward mapping relation and the second reverse mapping relation, and if the distortion degree is not within the error allowable range, recalculating the second forward mapping relation and the second reverse mapping relation;
And rendering the first image content to be played by using the first reverse mapping relation, and rendering the second image content to be played by using the second reverse mapping relation.
2. The visual display system of claim 1, wherein the polarization directions of the first polarizer and the second polarizer are orthogonal to each other.
3. The visual display system of claim 1 wherein the optics are concave mirrors that reflect light as well as transmit light, the image source being disposed toward the concave curved surface of the optics;
Or/and the concave curved surface of the optical device comprises a plurality of micro-structure cambered surfaces, the curvatures of the micro-structure cambered surfaces are the same, and the micro-structure cambered surfaces are closely arranged;
Or/and, the visual display system further comprises an adjusting mechanism connected to the image source, the adjusting mechanism being used for adjusting the distance between the image source and the optical device;
Or/and, the visual display system further comprises a zoom mechanism disposed between the image source and the optics.
4. The utility model provides a wear display device, includes the glasses body and connect wear the mounting on the glasses body, its characterized in that still includes the visual display system of any one of claims 1 ~ 3, visual display system sets up on the wear display device, the optics install in the glasses body to as wear the lens display of display device and use, the image source, first polarizer and second polarizer connect in the glasses body.
5. The utility model provides a wear display device, includes the glasses body and connects wear the mounting on the glasses body, its characterized in that still includes:
the image source interface is used for installing a polarized stereoscopic display;
an optical device arranged adjacent to the image source interface, so that the image content played by the polarized stereoscopic display can be imaged in the optical device, and the optical device is a single concave mirror; and
The first polaroid and the second polaroid are arranged in parallel, the first polaroid and the second polaroid are arranged opposite to the optical device, the polarization directions of the first polaroid and the second polaroid are different, the optical device comprises two focuses, and the two focuses are respectively arranged in an offset manner towards two sides of the optical device relative to the geometric center of the optical device and are respectively corresponding to the first polaroid and the second polaroid;
The polarization stereoscopic display is used for performing anti-distortion processing on first image content and second image content to be played, emitting light rays polarized along a first direction to display the first image content subjected to the anti-distortion processing, and emitting light rays polarized along a second direction to display the second image content subjected to the anti-distortion processing; the first direction is the same as the polarization direction of the first polaroid, and the second direction is the same as the polarization direction of the second polaroid;
The polarized stereoscopic display is also used for acquiring optical parameters of the optical device; according to the optical parameters, calculating a first forward mapping relation and a first reverse mapping relation between distorted first image content observed by a user and original first image content; simulating the distortion degree of the distorted first image content observed by the user relative to the original first image content based on the first forward mapping relation and the first reverse mapping relation, and if the distortion degree is not within the error allowable range, recalculating the first forward mapping relation and the first reverse mapping relation; calculating a second forward mapping relation and a second reverse mapping relation between distorted second image content observed by a user and original second image content according to the optical parameters; simulating the distortion degree of distorted second image content observed by a user relative to original second image content based on the second forward mapping relation and the second reverse mapping relation, and if the distortion degree is not within the error allowable range, recalculating the second forward mapping relation and the second reverse mapping relation; and rendering the first image content to be played by using the first reverse mapping relation, and rendering the second image content to be played by using the second reverse mapping relation.
6. A visual display method applied to an AR/VR headset, the visual display method comprising:
Providing an optical device and an image source, enabling the image source to project image content to be played to the optical device, wherein the image source is a polarized stereoscopic display, and the optical device is a single concave mirror;
providing a first polaroid and a second polaroid which are arranged in parallel, enabling the first polaroid and the second polaroid to be arranged opposite to the optical device, enabling the polarization directions of the first polaroid and the second polaroid to be different, enabling the optical device to comprise two focuses, enabling the two focuses to be respectively arranged in an offset mode towards two sides of the optical device relative to the geometric center of the optical device, and enabling the two focuses to be respectively corresponding to the first polaroid and the second polaroid in an offset mode; and
Controlling the image source to perform anti-distortion processing on the first image content and the second image content to be played, sending out light polarized along the first direction to display the first image content after the anti-distortion processing, and sending out light polarized along the second direction to display the second image content after the anti-distortion processing; wherein the first direction is the same as the polarization direction of the first polarizer and the second direction is the same as the polarization direction of the second polarizer;
Controlling the image source to acquire optical parameters of the optical device; according to the optical parameters, calculating a first forward mapping relation and a first reverse mapping relation between distorted first image content observed by a user and original first image content; simulating the distortion degree of the distorted first image content observed by the user relative to the original first image content based on the first forward mapping relation and the first reverse mapping relation, and if the distortion degree is not within the error allowable range, recalculating the first forward mapping relation and the first reverse mapping relation; calculating a second forward mapping relation and a second reverse mapping relation between distorted second image content observed by a user and original second image content according to the optical parameters; simulating the distortion degree of distorted second image content observed by a user relative to original second image content based on the second forward mapping relation and the second reverse mapping relation, and if the distortion degree is not within the error allowable range, recalculating the second forward mapping relation and the second reverse mapping relation; and rendering the first image content to be played by using the first reverse mapping relation, and rendering the second image content to be played by using the second reverse mapping relation.
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