CN107728319B - Visual display system and method and head-mounted display device - Google Patents
Visual display system and method and head-mounted display device Download PDFInfo
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- CN107728319B CN107728319B CN201710973323.2A CN201710973323A CN107728319B CN 107728319 B CN107728319 B CN 107728319B CN 201710973323 A CN201710973323 A CN 201710973323A CN 107728319 B CN107728319 B CN 107728319B
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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
- G02B27/0172—Head mounted 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
- G02B2027/0178—Eyeglass type
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Abstract
The invention relates to a visual display system and a visual display method, and a head-mounted display device. The visual display system includes: a first image source; the first transflective optical device is arranged at a first included angle with the first image source; the second image source is arranged at a second included angle with the first transflective device and is positioned at one side of the first transflective device away from the first image source; and a second transflector whose optical axis is arranged at a third angle to the first transflector. When the first image source and the second image source work, the played image content on the first image source and the second image source is projected onto the second transflective device through the first transflective device, and a user can watch the superimposed image content on the second transflective device. According to the visual display system, the image contents played by the first image source and the second image source are overlapped by the first transflective optical device, so that AR light field display with higher quality can be realized at lower cost.
Description
Technical Field
The present invention 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.
However, most of the existing AR display technologies do not have a light field display function, and only three-dimensional stereoscopic effect can be generated by a stereoscopic vision technology (stereoscopic vision). However, three-dimensional display is realized by adopting a stereoscopic vision technology, so that three-dimensional imaging is false, and visual fatigue can be caused by long-term use. In addition, because the human eyes always focus on a fixed position when viewing the virtual object, the virtual object cannot be well fused with the real environment, and the user often needs to switch the focal length unnaturally in the virtual object and the real environment, so that the visual fatigue is further aggravated.
Disclosure of Invention
An object of an embodiment of the present invention is to provide a visual display system and method capable of realizing AR light field display with higher quality at a lower cost, 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.
A visual display system for use in AR light field display, comprising: the first image source is used for playing the first multimedia content; a first transflector disposed at a first included angle with the first image source; the second image source is arranged at a second included angle with the first transflective optical device and is positioned at one side of the first transflective optical device away from the first image source; the second image source is used for playing second multimedia content; and a second transflector, the optical axis of the second transflector being disposed at a third angle to the first transflector.
Wherein in some embodiments, a transflective film layer is disposed on a side of the first transflector that faces the first image source.
Wherein in some embodiments, the first included angle is equal to the second included angle, and an image distance of a virtual image formed by the first image source in the first transflective device is different from a distance between the second image source and the first transflective device.
Wherein, in some embodiments, the first included angle ranges from: 45 degrees or more and less than 90 degrees.
Wherein in some embodiments, the first image source has a virtual image in the first transflector that has an image distance from the second image source to the first transflector that is less than the focal length of the second transflector.
Wherein in some embodiments, the second transflector is a concave lens that both reflects light and transmits light, the concave surface of the second transflector facing the first transflector.
Wherein, in some embodiments, the range of the third included angle is: is greater than the first included angle and less than the sum of the first included angle and the 180 degrees.
In some embodiments, the optical axis of the second light-transmitting and reflecting device forms a fourth included angle with the preset sight line direction of the user.
Wherein, in some embodiments, the fourth included angle ranges from: greater than 0 degrees and less than 90 degrees.
Wherein, in some embodiments, the visual display system further comprises an adjustment mechanism connected to the first image source and the second image source, respectively, the adjustment mechanism being for adjusting a distance between the first image source and the second transflector and for adjusting a distance between the second image source and the second transflector.
Wherein in some embodiments, the visual display system further comprises a zoom mechanism disposed between the first and second transflectors.
The utility model provides a wear display device, includes the glasses body and connects dress mounting on the glasses body, still includes the visual display system of above-mentioned arbitrary one, visual display system sets up wear display device is last, second light-transmitting mirror device sets up the place ahead of glasses body, and as wear display device's lens display uses, first image source second image source and first light-transmitting mirror device sets up in the glasses body.
The utility model provides a wear display device, includes the glasses body and connects wear the mounting on the glasses body, still includes: the first image source is used for playing the first multimedia content; a first transflector disposed at a first included angle with the first image source; the image source interface is connected with the first image source and is used for installing a second image source, so that the second image source and the first transflective optical device are arranged at a second included angle, and the second image source is positioned at one side of the first transflective optical device, which is away from the first image source; the second image source is used for playing second multimedia content; and a second transflector, the optical axis of the second transflector being disposed at a third angle to the first transflector.
A visual display method applied to AR light field display, the visual display method comprising: providing a second transflective device, and enabling a first preset included angle to be formed between an optical axis of the second transflective device and a preset user sight; providing a first transflective device, and enabling a second preset included angle to be formed between optical axes of the first transflective device and the second transflective device; providing a first image source, and setting a third preset included angle between the first image source and the first transflective optical device; providing a second image source, and setting a fourth preset included angle between the second image source and the first transflective optical device; and controlling the first image source to play first multimedia content, and controlling the second image source to play second multimedia content, wherein the image content played on the first image source and the second image source is projected onto the second transflective device through the first transflective device.
Compared with the prior art, in the visual display system provided by the embodiment of the invention, the first multimedia content of the first image source and the second multimedia content of the second image source are overlapped together through the first transflective optical device, so that the playing content can be applied to the light field display of the AR, and the implementation cost is relatively low. When the first multimedia content and the second multimedia content are overlapped, diffraction effects which are easy to generate when two image sources or two displays are overlapped are avoided, so that the interference on the displayed image content in the second transflective optical device is smaller, the imaging quality in the second transflective optical device is relatively higher, the imaging is closer to the natural look and feel, and eyestrain of a user can be prevented better.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, 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 invention, 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 provided by an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of region II of the visual display system shown in FIG. 1;
FIG. 3 is a schematic view of the optics of the visual display system shown in FIG. 1;
FIG. 4 is a schematic view of an optical lens of the visual display system shown in FIG. 1;
FIG. 5 is a schematic illustration of the imaging principles of the visual display system shown in FIG. 1;
fig. 6 is a schematic diagram of a head-mounted display device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
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 invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-2, embodiments of the present invention provide a visual display system, method, system, and article for stereoscopic vision of 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, and the like.
In particular, in the embodiment shown in fig. 1 and 2, the visual display system 100 includes a first image source 10, a second image source 30, a first transflector 50, and a second transflector 70. The first image source 10 and the first transflective device 50 are disposed at a first included angle a, and the second image source 30 is disposed at a side of the first transflective device 50 away from the first image 10 and is disposed at a second included angle B with the first transflective device 50. The second transflector 70 is disposed adjacent to the first transflector 50, and a third angle C is formed between the optical axis 90 of the second transflector 70 and the first transflector 50.
When the visual display system 100 works, the first image source 10 and the second image source 30 play the image content to be displayed, specifically, the first image source 10 includes a first display screen (not labeled in the figure), and the display screen is used for playing the first multimedia content; the second image source 30 comprises a second display screen (not shown) for playing second multimedia content. The first multimedia content and the second multimedia content are projected onto the second transflector 70 by the first transflector 50, so that a user can view the superimposed image content reflected by the second transflector 70 to establish a light field display.
In some specific embodiments, the first included angle a between the first image source 10 and the first transflector 50 ranges from: 45 degrees or more and less than 90 degrees. The second included angle B between the second image source 30 and the first transflective device 50 is in the range of: 45 degrees or more and less than 90 degrees. In this embodiment, the first angle a is equal to the second angle B.
Further, the second image source 30 is spaced from the first image source 10 by a distance such that the image distance of the virtual image formed by the first image source 10 in the first transflector 50 is different from the distance between the second image source 30 and the first transflector 50, so that the virtual image formed by the first image source 10 in the first transflector 50 is spaced from the second image source 30 by a first preset distance L (see fig. 5), that is, the image distance of the virtual image formed by the first image source 10 in the first transflector 50 is different from the distance between the second image source 30 and the first transflector 50 by a first preset distance L, and the second image source 30 is relatively far from the first transflector 50, so that the first multimedia content of the first image source 10 is located in the first transflector 50 in the virtual image 12 before the virtual image formed by the first image source 10 is located in the first transflector 50, that is, the virtual image source 12 is not overlapped with the first image source 30 in the first transflector 30. The first virtual image 14 formed in the second transflector 70 after the image content played in the first image source 10 is reflected by the first transflector 50 and the second virtual image 34 formed in the second transflector 70 after the image content played in the second image source 30 is transmitted by the first transflector 50 are separated by a second preset distance H, so that the image content observed by the user in the second transflector 70 is more stereoscopic and lifelike. In addition, the first virtual image 14 and the second virtual image 34 are spaced by the preset distance H, so that the image content presented on the second transflective device 70 can be more naturally fused and superimposed with the real environment on the other side of the second transflective device 70 when the user views the image, thereby achieving the display effect of augmented reality and preventing the eyestrain of the user. Further, in some embodiments, the first preset distance L between the virtual image of the first image source 10 in the first transflector 50 and the second image source 30 is smaller than the focal length of the second transflector 70.
It will be appreciated that in some embodiments, the second image source 30 and the first image source 10 may be symmetrically disposed about the first transflector 50. At this time, the first transflective device 50 is provided with a transflective film layer 54 on a side facing the first image source 10, and the second image source 30 and the virtual image formed by the first image source 30 in the first transflective device 50 can be separated by the predetermined distance by the thickness of the first transflective device 50.
In some embodiments, the first image source 10 and the second image source 30 may be the same image source, or may be different types of image sources. The image source may include any type of self-emissive or illuminating pixel array for playing imagery, 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.
It will be appreciated that in other embodiments, the optical display system 100 may not include the first image source 10, but instead the image source provided by the user may be the first image source 10. At this time, the optical display system 100 includes a first image source interface and the second image source 30, and the second image source 30 is a display connected to the first image source interface. The first image source interface is used for installing and connecting a first image source 10 (or an external first image source 10) provided by a user, so that the first image source 10 (or the external first image source 10) provided by the user and the second image source 30 are in the positional relationship provided by the embodiment. It should also be understood that, in some embodiments, the optical display system 100 may not include the second image source 30, but include a second image source interface, and an image source (or an external image source) provided by a user is used as the second image source 30, which is not described in detail herein.
The first light transmitting and reflecting device 50 is a light transmitting and reflecting lens capable of reflecting light and transmitting light, and the transmittance range of the first light transmitting and reflecting device 50 to the light is as follows: more than 0% and less than 100%, and is specifically designed according to actual requirements. The first transflector 50 is configured to reflect the image content played in the first image source 10 into the second transflector 70, and allow the image content played in the second image source 30 to be transmitted into the second transflector 70, so that the image content in the first image source 10 and the second image source 30 is represented as a more realistic three-dimensional image in the second transflector 70.
Referring also to fig. 3, in some embodiments, the first transflector 50 includes an optical device body 52 and a transflector layer 54, the transflector layer 54 being a transflector that reflects light as well as transmits light. The transflective film layer 54 is disposed on the first transflective optical device body 52 at a side facing the first image source 10, so that the image content played in the first image source 10 can be directly reflected by the transflective film layer 54, thereby avoiding the influence of the thickness of the first transflective optical device 50 on the refraction of light, enabling the path of light propagation in the first image source 10 to be more accurately controllable, and being beneficial to improving the display effect of the visual display system 100.
In some embodiments, the transflective film layer 54 may be a reflective film or a thin reflective film. When the transflective film layer 54 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 transflector film layer 54 may cover a portion of the first transflector body 52 or may cover the entire surface of the first transflector body 52. It will be appreciated that in some embodiments, the transflector film layer 54 may also be disposed on the side of the first transflector body 52 facing the second image source 30.
In some embodiments, the first transflector 50 may further include a protective film (not shown) to prevent the first transflector body 52 from being corroded, worn or scratched, making the first transflector 500 more durable. Specifically, the protective film layer may be disposed on both or either surface of the first transflector body 52, on a surface of the transflector film layer 54 facing away from the first transflector body 52, or between the first transflector body 52 and the transflector film layer 54.
Referring again to fig. 1 and 2, the second transflector 70 is configured to present image content played by the first image source 10 and the second image source 30. In this embodiment, the second transflector 70 is a concave lens, and its concave surface is disposed towards the first transflector 50. A third included angle C is formed between the optical axis 90 of the second light-transmitting and reflecting device 70 and the first light-transmitting and reflecting device 50, and the range of the third included angle C is as follows: is larger than the first included angle A and smaller than the sum of the first included angle A and the angle of 180 degrees (namely, the first included angle A is smaller than the third included angle C and smaller than 180 degrees and is larger than the first included angle A). In the first embodiment, the third included angle C is equal to the sum of the first included angle a and the 90 degree angle (i.e., the third included angle c=90 degrees+the first included angle a)
When the visual display system 100 described above is applied to a near-eye display, such as a head-mounted display device (fig. 6), the focal length of the second transflector 70 may be small. For example, the focal length of the second transflector 70 may be greater than or equal to 1 centimeter. 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 second transflector 70 may be relatively large, for example, the focal length of the second transflector 70 may range from one centimeter to several meters. It will be appreciated that the scope of the second transflector 70 may be set according to the actual use requirements and is not limited to that described in this specification.
Further, the second transflector 70 is a transflector lens that can reflect light and transmit light, so that the image content played by the first image source 10 through the first transflector 50 and the image content played by the second image source 30 through the first transflector 50 can form a virtual image (the first virtual image 14 and the second virtual image 14) in the second transflector 70, and a user can observe the real environment in front through the second transflector 70, so that the played content on the second transflector 70 can be fused and superimposed with the real environment more naturally.
Further, when the second transflective device 70 is a transflective concave lens capable of reflecting light and transmitting light, the transmittance of the second transflective 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 second transflector 70 includes a lens body 72 and a transflector layer 74. The transflective film layer 74 is disposed on the lens body 72 on a side facing the first transflective optical device 50, so that the image content played in the first image source 10 and the second image source 30 can be directly reflected by the transflective film layer 74 and enter the eyes of the user, thereby avoiding the influence of the thickness of the second transflective optical device 70 on the refraction of light, and being beneficial to improving the display effect of the visual display system.
In some embodiments, the transflective film layer 74 may be a reflective film or a thin reflective film. When the transflective film layer 74 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 74 may cover a portion of the area of the lens body 72 or may cover the entire surface of the lens body 72. It will be appreciated that in some embodiments, the transflector layer 74 may also be disposed on a side of the lens body 72 facing away from the first transflector 50.
In some embodiments, the second transflector 70 may further include a protective film layer 76 to prevent the lens body 72 from being corroded, worn or scratched, making the second transflector 70 more durable. In some embodiments, the protective film 76 may be disposed on either or both surfaces of the lens body 72, on the surface of the transflective film 74 facing away from the lens body 72, or between the lens body 72 and the transflective film 74.
In some embodiments, the second transflector 70 may be an anti-fog lens. Specifically, an anti-fog layer (not shown) is disposed on the second light-transmitting and reflecting device 70, and the anti-fog layer can prevent water vapor in the air from condensing and adhering to the second light-transmitting and reflecting device 70, so as to ensure the definition of the user when watching the playing content. In this embodiment, the anti-fog layer is an electrothermal anti-fog layer. It will be appreciated that in other embodiments, the anti-fog layer may be a nano-anti-fog film that covers the surface of the second transflector 70, or may be an anti-fog coating that is applied to the surface of the second transflector 70.
In some embodiments, the second transflector 70 is provided with a stiffening film thereon. The hardening film serves to enhance the hardness and abrasion resistance of the second transflector 70, to prevent the second transflector 70 from being scratched or damaged by impact. In this embodiment, the hardening film 70 is formed of two layers, and the two layers of hardening films are respectively disposed on two sides of the second transflective optical device 70. It will be appreciated that in other embodiments, the stiffening film may be a layer and disposed on the side of the second transflector 70 facing away from the first transflector 50.
In some embodiments, the second transflector 70 is further provided with an oil-proof film, which is used to prevent the second transflector 70 from being corroded or polluted by oil, grease, sebum and other substances, so that the second transflector 70 is kept clear. In particular in the illustrated embodiment, the oil stain resistant film is located on the side of the second transflector 70 that faces away from the first transflector 50. Because the oil stain-proof film is arranged on the second transflective device 70, the fingerprint is prevented from being left on the second transflective device 70 when the user takes the second transflective device 70, thereby keeping the second transflective device 70 in a clean state.
It will be appreciated that in practical applications, any one of the anti-fog layer, the protective film layer 76, the hard coat layer and the oil stain-proof film may be applied to the second transflector 70 separately, and the film layer disposed on any side of the second transflector 70 may be determined according to practical needs, so as to achieve the optical performance of the second transflector 70; alternatively, any combination of the above-mentioned anti-fog layer, protective film layer 76, hard coat layer and oil stain-proof film may be applied to the second transflector 70 at the same time, and the lamination positions and sequences of the combination of the multiple film layers on the second transflector 70 may be determined according to actual needs.
The visual display system 100 provided by the embodiment of the invention can be applied to a method, a system and a product for stereoscopic vision of virtual reality and/or augmented reality, and can also be applied to technologies such as naked eye 3D display, AR light field display, near-to-eye display and the like.
For example, in some embodiments, the visual display system 100 may be applied to AR light field display, the second transflector 70 may be used as a translucent display screen, and the first image source 10 and the second image source 30 may be used as players. When the visual display system 100 is used, in order to ensure that the glasses of the user can head up to play content, the sight line direction of the user is preset to be the horizontal direction, so that a fourth included angle D (refer to fig. 1) is formed between the optical axis 90 of the second transflective optical device 70 and the horizontal direction, wherein the range of the fourth included angle D is determined by the relative positions of the first image source 10, the second image source 30, and the second transflective optical device 70, that is, the fourth included angle D is determined by the first included angle a, the second included angle B, and the third included angle C; specifically, the range of the fourth included angle D may be: 0 degrees or more and 90 degrees or less. It can be appreciated that, in other embodiments, if the line of sight of the user is a direction other than the horizontal direction, such as the user looking obliquely upward, looking obliquely downward, etc., according to the specific requirements, the included angle formed between the optical axis 90 of the second light-transmitting/reflecting device 70 and the direction of sight of the preset user may be greater than or equal to 0 degrees and less than or equal to 90 degrees, so as to ensure that the user has better viewing experience.
Let the focal length of the second transflector 70 be f, the object distance of the virtual image 12 formed by the first image source 10 in the first transflector 50 before the second transflector 70 be do1, and the image distance of the first virtual image 14 formed by the first image source 10 in the second transflector 70 be di1. Then, according to the lens imaging principle, the relationship among the first image source 10, the virtual image 12 and the first virtual image 14 of the optical lens is:
di1 = -f do 1/(f-do 1); wherein the focal length direction of the second transflector 70 is taken as the positive direction.
At this time, if a desired predetermined imaging depth (dil, i.e., image distance) is to be achieved, the object distance of the virtual image 12 of the first image source 10 in front of the second transflector 70 may be set to do1 according to actual requirements at the determined focal length f of the second transflector 70. In some specific embodiments, the imaging depth (image distance) di1 of the first virtual image 14 formed by the first image source 10 in the second transflector 70 may be set to-20 cm (with the focal length direction of the second transflector 70 being the positive direction), or other suitable distance.
Similarly, let the object distance of the second image source 30 before the second transflective device 70 be do2, and the image distance of the second virtual image 34 formed by the second image source 30 in the second transflective device 70 be di2. Then, according to the lens imaging principle, the relationship between the second image source 30 and the second virtual image 34 of the optical lens is:
di2 = -f do 2/(f-do 2); wherein the focal length direction of the second transflector 70 is taken as the positive direction.
At this time, if the required predetermined imaging depth (di 2, i.e., image distance) is to be achieved, the object distance of the second image source 30 in front of the second transflector 70 may be set to do2 according to the actual requirement at the determined focal length f of the second transflector 70. In some specific embodiments, the imaging depth (image distance) di2 of the second virtual image 34 of the second image source 30 formed in the second transflector 70 may be set to-130 cm, -200cm (with the focal length direction of the second transflector 70 being the positive direction), or other suitable distance.
Further, in order to facilitate controlling the imaging depths di1 and di2 of the play content in the second transflector 70, the visual display system 100 may further include an adjusting mechanism (not shown in the figure) for adjusting the object distance do1 of the virtual image 12 formed by the first image source 10 in the second transflector 70 in front of the second transflector 70 and the object distance do2 of the second image source 30 in front of the second transflector 70, thereby adjusting the imaging depths di1 and di2 of the play content.
Specifically, the adjustment mechanism is connected to the first image source 10 and the second image source 30, respectively, and the adjustment mechanism may be an electric motor mechanism or other suitable mechanism. In a specific embodiment, the adjustment mechanism is used to adjust the distance between the first image source and the second transflector to achieve adjustment of the object distance do1 of the virtual image 12 of the first image source 10 in the second transflector optic 70 in front of the second transflector optic 70; the adjustment mechanism is further configured to adjust a distance between the first image source 10 and the second image source 30 to adjust a distance between the second image source 30 and a virtual image of the first image source 10 in the first transflector 50 and to achieve an adjustment of an object distance do2 of the second image source 30 in front of the second transflector 70. It is understood that the adjusting mechanism is also capable of adjusting the first angle a and the second angle B.
In the visual display system 100, the object distance do1 of the virtual image 12 formed by the first image source 10 in the first transflective device 50 before the second transflective device 70 is different from the object distance do2 of the second image source 30 before the second transflective device 70 (do 1 is not equal to do 2), and the playing contents of the first image source 10 and the second image source 30 are superimposed together by the first transflective device 50, so that the playing contents can be applied to the light field display of the AR, and the implementation cost is relatively low. When the playing contents of the first image source 10 and the second image source 30 are overlapped, the diffraction effect easily generated when the two image sources or the two displays are overlapped is avoided, so that the interference of the playing contents presented in the second transflective optical device 70 is smaller, the imaging quality in the second transflective optical device 70 is relatively higher, and the imaging is closer to the natural look and feel, thereby better preventing the eyestrain of the user. In addition, since do1 is not equal to do2, the first virtual image 14 formed by the first image source 10 in the second transflective optical device 70 and the second virtual image 34 formed by the second image source 30 in the second transflective optical device 70 are not at the same imaging depth (di 1 is not equal to di 2), so that the end user can see two images in different focal segments, and the user can directly experience AR light field display in combination with the light field display rendering algorithm, and therefore, the implementation cost of the visual display system 100 is relatively low.
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 second transflective optical device 70, the visual display system 100 may further include a zooming mechanism (not shown in the figure). The zoom mechanism may be disposed between the first and second transflectors 70, or may be disposed between the first image source 10 and the first transflector 70 and between the second image source 30 and the first transflector 70. 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. 6.
Meanwhile, the embodiment of the invention further provides a head-mounted display device 200, referring to fig. 1 and 6, 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 within the head-mounted display device 200, and in particular, the second transflector 70 is disposed in front of the eyeglass body 201 and is used as a lens display of the head-mounted display device 200, and the first image source 10, the second image source 30, and the first transflector 50 are disposed within the eyeglass 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 second transflector 70, the visual display system 100 may further include a zoom mechanism (not shown in the figure). The zoom mechanism is disposed within the eyeglass body 201 and may be located between the first and second transflectors 70, or may be disposed between the first image source 10 and the first transflector 70 and between the second image source 30 and the first transflector 70. 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, in the head-mounted display apparatus 200, the optical display system 100 may not include the first image source 10, 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 first image source 10. At this time, the optical display system 100 includes a first image source interface 90 and the second image source 30, and the second image source 30 is a display connected to the first image source interface 90. The first image source interface 90 is configured to mount and connect to the first image source 10 provided by the user, so that the first image source 10 provided by the user and the second image source 30 are in the positional relationship provided by the above embodiment. In use, a user inserts his own image source directly onto the first image source interface 90 for use. It is also understood that, in some embodiments, the optical display system 100 of the head-mounted display device 200 may not include the second image source 30, and an image source provided by a user is used as the second image source 30, which is not described in detail herein.
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 videos associated with the play content into a format that can be projected onto the second transflector 70. 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); alternatively, all images may be generated at a particular depth plane; alternatively, the image generation processor may be arranged to present slightly different images to the left and right eyes of the user, respectively, so that when both eyes of the user are viewed together, the content is coherent and comfortable, and a more realistic stereoscopic image can also be presented.
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 invention 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 a first image source, a second image source, an optical device and an optical lens. The first image source and the first transflective optical device are arranged at a first included angle A, and the second image source is arranged at one side of the first transflective optical device, which is away from the first image, and is arranged at a second included angle B with the first transflective optical device. The second transflector is arranged adjacent to the first transflector, and a third included angle C is formed between the optical axis of the second transflector and the first transflector. The visual display method comprises the following steps:
Step S101: and providing an optical lens, and setting a first preset included angle between the optical axis of the second transflective 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 second transflective optical device is a transflective concave lens that can reflect light and transmit light, and the transmittance of the second transflective optical device is in the range of: greater than 0% and less than 100%. The second transflective optical device comprises a lens body and a transflective film layer, and the transflective film layer is arranged on one side of the concave surface of the lens body.
Step S103: and providing an optical device, wherein a second preset included angle is formed between the optical axes of the first transflective optical device and the second transflective optical device.
Wherein, in some embodiments, the side of the first transflective device facing the second transflective device is provided with a transflective film layer, and the transmittance range of the transflective film layer to light is: greater than 0% and less than 100%. Specifically, the first transflector includes an optic body and a transflector film layer. The transflective film layer is disposed on the first transflective device body on a side facing the second transflective device.
Step S205: providing a first image source, and setting a third preset included angle between the first image source and the first transflective optical device. Further, the range of the third preset included angle is as follows: 45 degrees or more and less than 90 degrees.
In some real-time examples, the second preset included angle is greater than the third preset included angle and less than the sum of the third preset included angle and the 180 degrees (i.e., the second preset included angle < the third preset included angle < 180 degrees+the third preset included angle).
Wherein in some embodiments, the first image source is disposed on a side of the first transflector having the transflector layer.
Step S107: providing a second image source, and setting a fourth preset included angle between the second image source and the first transflective optical device. Further, the range of the fourth preset included angle is as follows: 45 degrees or more and less than 90 degrees.
Wherein in some embodiments, the third preset included angle is equal to the fourth preset included angle, and the virtual image formed by the first image source in the first transflective optical device is spaced from the second image source by a first preset distance. Further, the range of the first preset distance is: less than the focal length of the second transflector 70.
In some embodiments, the range of the first preset included angle is determined by the relative positions of the first image source, the second image source and the second transflective device, that is, the range of the first preset included angle is determined by the second preset included angle, the third preset included angle and the fourth preset included angle. Specifically, the range of the first preset included angle may be: 0 degrees or more and 90 degrees or less. Wherein in some embodiments, the second image source is disposed on a side of the first transflector that is free of the transflector layer.
Wherein in some embodiments, the second image source and the first image source are symmetrically disposed about the first transflector.
Step S109: and controlling the first image source and the second image source to synchronously play the same content, wherein the play content on the first image source and the play content on the second image source are projected onto the second transflective optical device through the first transflective optical device, so that a user can watch the play content on the second transflective optical device.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention 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 invention.
Claims (7)
1. A visual display system for use in AR light field display, the visual display system comprising:
the first image source is used for playing the first multimedia content;
the first transflective optical device is arranged at a first included angle with the first image source, and the first included angle is larger than or equal to 45 degrees and smaller than 90 degrees; a transflective film layer is arranged on one side of the first transflective optical device facing the first image source;
the second image source is arranged at a second included angle with the first transflective optical device and is positioned at one side of the first transflective optical device away from the first image source; the second image source is used for playing second multimedia content; the second included angle is greater than or equal to 45 degrees and smaller than 90 degrees, the first included angle is equal to the second included angle, and the second image source and the first image source are symmetrically arranged relative to the first transflective optical device; the image distance of a virtual image formed by the first image source in the first transflective optical device is different from the distance between the second image source and the first transflective optical device, and the difference between the image distance of the virtual image formed by the first image source in the first transflective optical device and the distance between the second image source and the first transflective optical device is smaller than the focal length of the second transflective optical device; and
The optical axis of the second transflective device is set at a third angle with the first transflective device, so that content played by the first image source is reflected to the second transflective device through the first transflective device and content played by the second image source is transmitted to the second transflective device through the first transflective device.
2. The visual display system of claim 1, wherein the optical axis of the second transflector is disposed at a fourth included angle with respect to a predetermined user line of sight.
3. The visual display system of claim 2 wherein the fourth included angle is in the range of: greater than 0 degrees and less than 90 degrees.
4. The visual display system of claim 1 wherein the second transflector is a concave lens that reflects light and transmits light, the concave surface of the second transflector facing the first transflector; the range of the third included angle is as follows: is greater than the first included angle and less than the sum of the first included angle and 180 degrees;
or/and, the visual display system further comprises an adjusting mechanism, the adjusting mechanism is respectively connected to the first image source and the second image source, and the adjusting mechanism is used for adjusting the distance between the first image source and the second transflective optical device and adjusting the distance between the second image source and the second transflective optical device;
Or/and, the visual display system further comprises a zoom mechanism disposed between the first and second transflector.
5. A head-mounted display device, including 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 ~ 4, visual display system sets up on the head-mounted display device, second light-transmitting mirror device sets up the place ahead of glasses body, and as the lens display of head-mounted display device uses, first image source, second image source and first light-transmitting mirror device sets up in the glasses body.
6. 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 first image source is used for playing the first multimedia content;
the first transflective optical device is arranged at a first included angle with the first image source, and the first included angle is larger than or equal to 45 degrees and smaller than 90 degrees; a transflective film layer is arranged on one side of the first transflective optical device facing the first image source;
The image source interface is connected with the first image source and is used for installing a second image source, so that the second image source and the first transflective optical device are arranged at a second included angle, and the second image source is positioned at one side of the first transflective optical device, which is away from the first image source; the second image source is used for playing second multimedia content; the second included angle is greater than or equal to 45 degrees and smaller than 90 degrees, the first included angle is equal to the second included angle, and the second image source and the first image source are symmetrically arranged relative to the first transflective optical device; the image distance of a virtual image formed by the first image source in the first transflective optical device is different from the distance between the second image source and the first transflective optical device, and the difference between the image distance of the virtual image formed by the first image source in the first transflective optical device and the distance between the second image source and the first transflective optical device is smaller than the focal length of the second transflective optical device; and
the optical axis of the second transflective device is set at a third angle with the first transflective device, so that image content played in the first image source is reflected to the second transflective device through the first transflective device, and image content played in the second image source is transmitted to the second transflective device through the first transflective device.
7. A visual display method, applied to AR light field display, comprising:
providing a second transflective device, and enabling a first preset included angle to be formed between an optical axis of the second transflective device and a preset user sight;
providing a first transflective device, and enabling a second preset included angle to be formed between optical axes of the first transflective device and the second transflective device;
providing a first image source, and setting a third preset included angle between the first image source and the first transflective optical device; the first transflective optical device is provided with a transflective film layer on one side facing the first image source, and the third preset included angle ranges from: 45 degrees or more and 90 degrees or less;
providing a second image source, wherein a fourth preset included angle is formed between the second image source and the first transflective optical device, the third preset included angle is equal to the fourth preset included angle, the second image source and the first image source are symmetrically arranged about the first transflective optical device, the fourth preset included angle is larger than or equal to 45 degrees and smaller than 90 degrees, a virtual image formed by the first image source in the first transflective optical device and the second image source are separated by a first preset distance, and the first preset distance is smaller than the focal length of the second transflective optical device;
And controlling the first image source to play first multimedia content and controlling the second image source to play second multimedia content, wherein the content played by the first image source and the content played by the second image source are projected onto the second transflective device through the first transflective device.
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| CN110927969A (en) | 2019-12-09 | 2020-03-27 | 京东方科技集团股份有限公司 | Optical display system and display device |
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| CN105929537A (en) * | 2016-04-08 | 2016-09-07 | 北京骁龙科技有限公司 | Head-mounted display and eyepiece system thereof |
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Denomination of invention: Visual display system and method, as well as head mounted display device Granted publication date: 20240123 Pledgee: China Merchants Bank Limited by Share Ltd. Guangzhou branch Pledgor: GUANGDONG VIRTUAL REALITY TECHNOLOGY Co.,Ltd. Registration number: Y2024980016796 |