Display system and head-mounted display device

Abstract

The application relates to a display system and a head-mounted display device. The wearable device comprises a frame, display lenses connected to the frame, and a display system arranged between the first display lens and the second display lens. The display system comprises a display, a first optical element and a second optical element. The display is used for providing display data information; the first optical element is arranged on one side of the display and is used for projecting the display data information provided by the display to the first display lens. The second optical element is opposite to the first optical element and is arranged on the same side of the display as the first optical element. The second optical element is used for projecting the display data information provided by the display to the second display lens. The head-mounted display device is more portable, improves the user experience, can increase the field of view when binocular display is performed, and improves the visual experience of the user.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, more particularly, to a display system and a head-mounted display device. BACKGROUND

[0002] With the development of technology, machine intelligence and information intelligence are increasingly popular, and the technology of identifying user images through visual devices such as machine vision or virtual vision to realize human-computer interaction is becoming more and more important.

[0003] Head-mounted displays (HMDs) have long proven to be of great value for many applications, spanning the fields of scientific visualization, medical and military training, engineering design and prototyping, tele-manipulation and tele-presence, and personal entertainment systems. In mixed reality and augmented reality systems, optical see-through HMDs are one of the basic methods of combining computer-generated virtual scenes with views of real-world scenes. An optical see-through head-mounted display (OST-HMD) optically overlays computer-generated images onto real-world views, typically through an optical combiner, while maintaining a direct, minimally degraded view of the real world. Modern computing and display technologies have

[0004] In most conventional AR / VR display technologies, a display with two display surfaces is usually used for projection, and the two display surfaces of the display project to an optical element at the same time, and form a first eye image and a second eye image respectively, and the first eye image and the second eye image imaged in the optical element are projected to the first eye and the second eye of the user respectively, thereby forming binocular vision. However, due to physical structure limitations, in the above AR / VR display technology, the device has a large volume, and the field angle of view (FOV) of the display is small, and the visual sense is not good. SUMMARY

[0005] The purpose of the embodiments of the present application is to provide a display system with compact structure, for solving the above technical problems. If necessary, a head-mounted display device applying the above display system is also provided.

[0006] The embodiment of the present application provides a display system, which is applied to a head-mounted display device. The display system comprises a display, a first optical element and a second optical element. The display is used for providing display data information; the first optical element is arranged on one side of the display and is used for projecting the display data information provided by the display to a first display lens of the head-mounted display device. The second optical element is opposite to the first optical element and is arranged on the same side of the display as the first optical element. The second optical element is used for projecting the display data information provided by the display to a second display lens of the head-mounted display device, wherein the second display lens is connected to the first display lens and is arranged in parallel with the first display lens.

[0007] In some embodiments, the first optical element comprises a first transmissive-reflection surface and a first reflection surface, the first transmissive-reflection surface is arranged on the side of the first optical element close to the first display lens, and the first reflection surface is arranged on the side of the first optical element away from the display.

[0008] In some embodiments, the second optical element comprises a second transmissive-reflection surface and a second reflection surface, the second transmissive-reflection surface is arranged on the side of the second optical element close to the second display lens, and the second reflection surface is arranged on the side of the second optical element away from the display.

[0009] In some embodiments, the first optical element and the second optical element are arranged in parallel on the side of the display surface of the display.

[0010] In some embodiments, the first optical element and the second optical element are both triangular prism structures.

[0011] In some embodiments, the first optical element comprises a first anti-reflection surface, and the first anti-reflection surface is arranged on the side of the first optical element facing the display; the second optical element comprises a second anti-reflection surface, and the second anti-reflection surface is arranged on the side of the second optical element facing the display.

[0012] In some embodiments, the angle between the plane where the first anti-reflection surface is located and the plane where the display surface of the display is located is greater than or equal to 45 degrees; and the angle between the plane where the second anti-reflection surface is located and the plane where the display surface of the display is located is greater than or equal to 45 degrees.

[0013] In some embodiments, the display system further comprises a light-transmitting piece, which is arranged on the side of the display facing the first optical element and the second optical element and is connected to the first optical element and the second optical element respectively.

[0014] In some embodiments, the display system further comprises a support piece, which is arranged on the side of the first optical element and the second optical element away from the display and is connected to the first optical element and the second optical element respectively.

[0015] In some embodiments, the display system further comprises a first imaging mirror and a second imaging mirror, the first imaging mirror and the second imaging mirror are respectively arranged on opposite sides of the display; the first imaging mirror is configured to project the display data information provided by the display via the first optical element to the first display lens; and the second imaging mirror is configured to project the display data information provided by the display via the second optical element to the second display lens.

[0016] In some embodiments, the display system further comprises a first shutter and a second shutter, the first shutter is arranged on the light path of the light emitted by the display via the first optical element to the first display lens; the second shutter is arranged on the light path of the light emitted by the display via the second optical element to the second display lens; the display is configured to alternately play a first eye image and a second eye image, and the first shutter and the second shutter are capable of being alternately opened and closed.

[0017] In some embodiments, the first optical element comprises a first transflector, the first transflector is arranged on the side of the first optical element close to the first display lens; the first shutter is arranged on the side of the first transflector away from the second optical element; the second optical element comprises a second transflector, the second transflector is arranged on the side of the second optical element close to the second display lens, and the second shutter is arranged on the side of the second transflector away from the first optical element.

[0018] In some embodiments, the display system further comprises a first polarizer and a second polarizer, the first polarizer is arranged on the light path of the light emitted by the display via the first optical element to the first display lens; the second polarizer is arranged on the light path of the light emitted by the display via the second optical element to the second display lens; the polarization directions of the first polarizer and the second polarizer are different; the display is configured to emit light polarized along a first direction to display a first eye image, and emit light polarized along a second direction to display a second eye image; 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.

[0019] In some embodiments, the first optical element comprises a first transflector, the first transflector is arranged on the side of the first optical element close to the first display lens; the first polarizer is arranged on the side of the first transflector away from the second optical element; the second optical element comprises a second transflector, the second transflector is arranged on the side of the second optical element close to the second display lens, and the second polarizer is arranged on the side of the second transflector away from the first optical element.

[0020] The head-mounted display device provided by the embodiment of the present application comprises a frame and a display lens connected to the frame, wherein the display lens comprises a first display lens and a second display lens, the second display lens is connected to the first display lens and arranged in parallel with the first display lens; the head-mounted display device further comprises a display system, which is arranged between the first display lens and the second display lens.

[0021] In some embodiments, the frame comprises a first leg, a second leg and a nose pad, the first leg is connected to the first display lens, the second leg is connected to the second display lens, and the nose pad is connected to the display system.

[0022] In some embodiments, the first display lens and the second display lens are both transreflective lenses which can transmit light and reflect light.

[0023] In some embodiments, the first display lens and the second display lens are both concave mirrors.

[0024] The head-mounted display device provided by the embodiment of the present application has the following advantages: the display system is arranged between the first display lens and the second display lens, so that the display system can respectively send data information (such as image, video, text and the like) to the first display lens and the second display lens, the structure of the head-mounted display device is simplified, the head-mounted display device is more portable, and the user experience is improved. Furthermore, the data information played by the display is reflected to the first display lens and the second display lens through the first optical element and the second optical element, so that a binocular image can be formed without using two displays, the field of view is relatively large, the user experience is improved, and the system power consumption is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 is a functional architecture schematic diagram of the head-mounted display device provided by the embodiment of the present application;

[0027] Figure 2 is a three-dimensional structure schematic diagram of the head-mounted display device provided by the embodiment of the present application;

[0028] Figure 3 is a principle schematic diagram of the head-mounted display device provided by the first embodiment of the present application;

[0029] Figure 4 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1; Figure 3 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1;

[0030] Figure 5 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1; Figure 3 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1;

[0031] Figure 6 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1;

[0032] Figure 7 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1; Figure 6 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1;

[0033] Figure 8 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1;

[0034] Figure 9 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1; Figure 8 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1;

[0035] Figure 10 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1; Figure 9 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1;

[0036] Figure 11 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1;

[0037] Figure 12 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1; Figure 11 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1;

[0038] Figure 13 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1;

[0039] Figure 14 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1; Figure 13 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1;

[0040] Figure 15 is a structural schematic diagram of a display system of a head-mounted display device shown in FIG. 1. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0042] It should be understood that when an element as a component of one assembly is referred to as being "on" another assembly, it can be directly on the other assembly or intervening assemblies can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. When an element as a component of one assembly is referred to as being "disposed on" another assembly, it can be directly disposed on the other assembly or intervening assemblies can also be present.

[0043] Unless otherwise defined, 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 in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0044] See Figure 1 The embodiments of the present application provide a head-mounted display device 200, a method, a system and an article for stereoscopic vision of augmented reality, virtual reality and / or mixed reality, and are particularly applied to augmented reality, virtual reality and mixed reality applications, and other applications, such as near-eye display, computing and display applications, or even pure text display, and the like.

[0045] Further, the head-mounted display device 200 includes a processor 207, a display system 100 and display lenses 203, the display system 100 is electrically connected to the processor 207, and is used for playing data information to the display lenses 203 under the control of the processor 207, so that the user can watch the played data information on the display lenses 203, and the data information can be in the form of images, symbols, texts, graphics, etc.

[0046] Further, the head-mounted display device 200 further comprises a processor 207, which can be an image generation processor, for controlling the playing content of the display system 100. Specifically, in some embodiments, the processor 207 is capable of converting images or videos associated with the playing content into a format that can be projected to the display lens 203. For example, when generating 3D content, the playing content can need to be formatted such that a portion of a particular image is displayed at a particular depth plane, while other portions are displayed at other depth planes (i.e., controlling the imaging depth of different parts in the same image); or, all images can be generated at a particular depth plane; or, the processor 207 can be used to present slightly different images to the user's first and second eyes respectively, to generate the aforementioned first-eye image and second-eye image, such that when the user's two eyes are observed together, the playing content is coherent and comfortable, and a more realistic stereoscopic image can be presented; or, the processor 207 can be used to correct distortion of the data information to be played, to improve the stereoscopic effect of the display system 100.

[0047] Further, the processor 207 can further comprise a memory, a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), and other circuits for image generation and processing. The processor 207 can be programmed with the desired playing content to be presented to the user of the virtual reality or augmented reality system.

[0048] When the processor 207 needs to process relatively complex data information, the volume of the processor 207 can be large, in which case the processor 207 can be independently arranged outside the head-mounted display device 200, and electrically connected with the display system 100 through a communication module. For example, the processor 207 can be arranged in an external fixed device (such as a computer host, a dedicated image transmission processing device, etc.), or the processor 207 can be an independent processing device, which is worn by the user (such as a head-mounted, shoulder-mounted, backpack-mounted, etc.). The connection between the processor 207 and the display system 100 can be wired or wireless.

[0049] Further, the head-mounted display device 200 can further comprise a communication module 208 and a power module 209, both of which are electrically connected with the processor 207. The communication module 208 is used for communication with peripheral communication devices (not shown), such as a Wi-Fi router, a computer server, a Bluetooth-based transmission device, an Internet-based device, an NFC (Near Field Communication)-based device, etc. The power module 209 is used to supply power to the communication module 208, the processor 207, and the display system 100, to ensure the normal operation of the head-mounted display device 200.

[0050] Please refer to Figure 2 , specifically inFigure 2 In the embodiment shown, the head-mounted display device 200 of the present application is a pair of glasses for a user to wear, which includes a frame 201, a display lens 203 and a display system 100. The display lens 203 is arranged on the frame 201, and the display system 100 is connected to the display lens 203. When the head-mounted display device 200 is in operation, the display system 100 projects data information to the display lens 203, so that the user can watch the played data information on the display lens 203. The data information can be in the form of images, symbols, texts, graphics, etc.

[0051] In the embodiment of the present application, the head-mounted display device 200 can be a frameless pair of glasses or a pair of glasses with frames. In the embodiment, the head-mounted display device 200 is a pair of frameless glasses, the frame 201 includes a first leg 2011 and a second leg 2013, and the display lens 203 is directly connected to the first leg 2011 and the second leg 2013. When the head-mounted display device 200 is arranged as a pair of frameless glasses, it is beneficial to expand the field of view of the head-mounted display device 200. In other embodiments, the head-mounted display device 200 can be a pair of glasses with frames, which can further include a frame arranged between the first leg 2011 and the second leg 2013, and the display lens 203 is connected to the frame. In other embodiments, the head-mounted display device 200 can also be a pair of clip glasses, which does not include legs but includes a clip, and the display lens 203 is connected to the clip. The head-mounted display device 200 is directly clamped on the user's nearsighted glasses by the clip, which brings great convenience to the nearsighted user.

[0052] In some embodiments, the head-mounted display device 200 can further include an operation panel 2051 and a display panel 2053. The operation panel 2051 can be a key panel, which is used to control the playing content, the imaging depth, the display color, the display brightness, the playing volume, etc. Accordingly, the operation panel 2051 can include playing content selection keys, imaging depth adjustment keys, display color adjustment keys, display brightness adjustment keys, and volume adjustment keys. The display panel 2053 is used to display the current state of the head-mounted display device 200, such as the playing content, the imaging depth, the display color and the display brightness, or / and the current time, the current power, the current volume, etc.

[0053] The display lens 203 is arranged between the first temple 2011 and the second temple 2013, and the first temple 2011 and the second temple 2013 are respectively pivotally connected to two sides of the display lens 203, so that the head-mounted display device 200 has a foldable structure. In this embodiment, the display lens 203 includes a first display lens 2031 and a second display lens 2033 arranged side by side, the first display lens 2031 is pivotally connected to the first temple 2011, and the second display lens 2033 is pivotally connected to the second temple 2013. It can be understood that in other embodiments, the display lens 203 can also be a whole lens structure, which can include a first display area and a second display area corresponding to the left eye and the right eye of the user respectively; accordingly, at this time, the first display area can be regarded as the first display lens 2031, and the second display area can be regarded as the second display lens 2033, that is, the first display lens 2031 and the second display lens 2033 can be connected to each other as a whole structure.

[0054] In this embodiment, the display lens 203 is a transflective lens that can reflect and transmit light, so that the data information played by the display system 100 can form a virtual image in the display lens 203, and the user can observe the real environment in front through the display lens 203, so that the played content on the display lens 203 can be more naturally and superimposed with the real environment. Further, the display lens 203 can include a transflective film layer (not shown in the figure) on the side of the display lens 203 facing the display system 100, so that the data information played in the display system 100 can be directly reflected by the transflective film layer and enter the user's eyes, thereby avoiding the influence of the thickness of the display lens 203 on light refraction, and being beneficial to improve the display effect of the head-mounted display device 200. In this embodiment, the first display lens 2031 and the second display lens 2033 of the display lens 203 are both concave mirrors to expand the range of the virtual image formed in the display lens 203.

[0055] The display system 100 is arranged between the first display lens 2031 and the second display lens 2033, and the display system 100 is used to play data information to the display lens 203. Further, in this embodiment, the first display lens 2031 and the second lens 2033 are symmetrically arranged, and the display system 100 is arranged corresponding to the symmetry axis of the first display lens 2031 and the second lens 2033. Specifically, in this embodiment, the display system 100 includes a first display system 1001 and a second display system 1003 arranged symmetrically with respect to the symmetry axis of the first display lens 2031 and the second lens 2033, and the first display system 1001 and the second display system 1003 are respectively arranged corresponding to the first display lens 2031 and the second display lens 2033. Figure 2In the embodiment shown, the display lens 203 of the display system 100 has a central symmetry plane O, the first display lens 2031 and the second display lens 2033 are mirror-symmetrically arranged about the central symmetry plane O, and the display system 100 is arranged between the first display lens 2031 and the second display lens 2033 so that the central symmetry plane O passes through the display system 100 substantially perpendicularly. In other words, the display system 100 is located at the nose pad of the head-mounted display device 200, and when the user wears the head-mounted display device 200, the display system 100 is located between the eyes of the user or between the eyebrows, which can avoid blocking the user's line of sight and facilitate reducing the size of the head-mounted display device 200. Further, the head-mounted display device 200 can further include a nose pad 204 connected to the display system 100 for supporting the head-mounted display device 200 on the bridge of the nose of the user, thereby improving the comfort of the user. It should be understood that in other embodiments, the nose pad 204 can also be connected to the display lens 203.

[0056] Referring to Figure 3 , Figure 3 A schematic diagram of the display system 100 according to the first embodiment of the present application is shown. In this embodiment, the display system 100 includes a display 10, a first optical element 32, and a second optical element 34. The display 10 is arranged between the first display lens 2031 and the second display lens 2033, and the first optical element 32 and the second optical element 34 are arranged on the side of the display 10 away from the display lens 203. When the display system 100 is in operation, the display 10 plays the data information to be played (such as image content, text content, video content, etc.), which can be projected to the first optical element 32 and the second optical element 34 and reflected by the first optical element 32 and the second optical element 34 to the display lens 203 to form a virtual image, so that the user can watch the played data information on the display lens 203. The data information played by the display 10 is reflected by the first optical element 32 to form a virtual image on the first display lens 2031, and the data information played by the display 10 is reflected by the second optical element 34 to form a virtual image on the second display lens 2033, as shown in Figure 5 .

[0057] Further, in the present embodiment, the display 10 is closer to the display lens 203 relative to the first optical element 32 and the second optical element 34, and the display 10 can correspond to a position between the first display lens 2031 and the second display lens 2033 (i.e., correspond to the center of symmetry O, so that the center of symmetry O is substantially vertically through the display 10), or the display 10 can be directly connected between the first display lens 2031 and the second display lens 2033. In the present embodiment, the display 10 is a micro display, which includes a display screen (not labeled in the figure) facing the display lens 203. The display screen can include any type of self-emitting or illuminating pixel array for playing images, for example, the display can include but is not limited to liquid crystal on silicon (LCoS) display device, liquid crystal display (LCD) panel, organic light emitting display (OLED), ferroelectric liquid crystal on silicon (FLCoS) device, digital mirror device (DMD), micro projector or micro projector based on the foregoing, such as laser projector or fiber scanner beam, or any other suitable type of micro display device. In the present embodiment, the display 10 includes one display screen to reduce the manufacturing cost of the head-mounted display device 200 and facilitate reducing the volume and weight of the head-mounted display device 200.

[0058] Please refer to Figure 3 and Figure 4 , the first optical element 32 and the second optical element 34 are disposed on the side of the display 10 away from the display lens 203. In the present embodiment, the first optical element 32 and the second optical element 34 are substantially the same structure, and both are substantially a triangular prism structure. The first optical element 32 and the second optical element 34 are mirror-symmetrically disposed about the center of symmetry O.

[0059] The first optical element 32 includes a first anti-reflection surface 321, a first trans-reflective surface 323, and a first reflective surface 325, which are sequentially disposed on the three sides of the first optical element 32.

[0060] Specifically, the first anti-reflection surface 321 is disposed on the side of the first optical element 32 facing the display 10, and the first anti-reflection surface 321 is used to allow the light of the display 10 to pass through and to increase the light transmittance of the first optical element 32 to improve the imaging effect of the display system 300. An anti-reflection film layer can be provided on the first anti-reflection surface 321 to facilitate improving the light transmittance. Further, the angle between the plane where the first anti-reflection surface 321 is located and the plane where the display surface of the display 10 is located is greater than or equal to a predetermined angle (e.g., 35 degrees, 45 degrees, 50 degrees, etc.), so that the light emitted by the display 10 can pass through the first anti-reflection surface 321 more completely, thereby avoiding the loss of data information displayed by the display 10.

[0061] The first transmissive-refractive surface 323 is disposed on the side of the first optical element 32 away from the second optical element 34 (i.e., on the side of the first optical element 32 close to the first display lens 2031), and is connected to the first anti-reflection surface 321. The first transmissive-refractive surface 323 is disposed towards the first anti-reflection surface 321, and is configured to reflect light that has passed through the first anti-reflection surface 321 to the first reflective surface 325. In this embodiment, the first transmissive-refractive surface 323 is a transmissive-refractive surface that can both transmit and reflect light. The first transmissive-refractive surface 323 can be provided with a transmissive-refractive film layer. Further, the first transmissive-refractive surface 323 is located at the end of the display 10 close to the first display lens 2031, and is substantially perpendicular to the plane in which the display surface of the display 10 lies.

[0062] The first reflective surface 325 is disposed on the side of the first optical element 32 away from the display 10, and is connected between the first anti-reflection surface 321 and the first transmissive-refractive surface 323. The first reflective surface 325 is disposed towards the first transmissive-refractive surface 323 (i.e., towards the first display lens 2031), and is configured to reflect light that has been reflected by the first transmissive-refractive surface 323 to the first display lens 2031. In this embodiment, the first reflective surface 325 is a total reflection mirror surface, so as to improve its reflectivity.

[0063] Referring to Figure 5 , when in use, light emitted by the display 10 passes through the first anti-reflection surface 321, reaches the first transmissive-refractive surface 323, and is reflected by the first transmissive-refractive surface 323 to the first reflective surface 325. The light is then reflected by the first reflective surface 325, passes through the first transmissive-refractive surface 323, and reaches the first display lens 2031, so as to form a virtual image on the first display lens 2031.

[0064] Referring to Figure 3 and Figure 4 , the second optical element 34 is disposed in parallel with the first optical element 32 on the side of the display 10 on which the display surface is located. In this embodiment, the structure of the second optical element 34 is substantially the same as that of the first optical element 32, and it also comprises a second anti-reflection surface 341, a second transmissive-refractive surface 343, and a second reflective surface 345, which are disposed in sequence on the three sides of the second optical element 34.

[0065] Specifically, the second anti-reflection surface 341 is arranged on the side of the second optical element 34 facing the display 10, and is configured to allow the light emitted by the display 10 to pass through and to increase the light transmittance of the second optical element 34, so as to improve the imaging effect of the display system 100. An anti-reflection film layer can be arranged on the second anti-reflection surface 341 to facilitate the increase of the light transmittance. Further, the angle between the plane where the second anti-reflection surface 341 is located and the plane where the display surface of the display 10 is located is greater than or equal to a preset angle (e.g., 35 degrees, 45 degrees, 50 degrees, etc.), so that the light emitted by the display 10 can pass through the second anti-reflection surface 341 more completely, thereby avoiding the loss of the data information displayed by the display 10.

[0066] Further, one side edge of the second anti-reflection surface 341 is in contact with or connected to one side edge of the first anti-reflection surface 321, so that an included angle is formed between the second anti-reflection surface 341 and the first anti-reflection surface 321, and the opening direction of the included angle is towards the display 10, i.e., the connection position of the second anti-reflection surface 341 and the first anti-reflection surface 321 is arranged opposite to the display 10, so that the light emitted by the display 10 can enter the second anti-reflection surface 341 and the first anti-reflection surface 321. Further, the included angle between the second anti-reflection surface 341 and the first anti-reflection surface 321 is less than or equal to a preset angle, e.g., less than or equal to 135 degrees.

[0067] The second transmissive-reflection surface 343 is arranged on the side of the second optical element 34 away from the first optical element 32 (i.e., on the side of the second optical element 34 close to the second display lens 2033), and is connected to the second anti-reflection surface 341. The second transmissive-reflection surface 343 is arranged towards the second anti-reflection surface 341, and is configured to reflect the light passing through the second anti-reflection surface 341 to the second reflection surface 345. In this embodiment, the second transmissive-reflection surface 343 is a transmissive-reflection lens surface, which can both transmit and reflect light. An anti-reflection film layer can be arranged on the second transmissive-reflection surface 343. Further, the second transmissive-reflection surface 343 is arranged at the end of the display 10 close to the second display lens 2033, and is substantially perpendicular to the plane where the display surface of the display 10 is located.

[0068] The second reflection surface 345 is arranged on the side of the second optical element 34 away from the display 10, and is connected between the second anti-reflection surface 341 and the second transmissive-reflection surface 343. The second reflection surface 345 is arranged towards the second transmissive-reflection surface 343 (i.e., towards the second display lens 2033), and is configured to reflect the light reflected by the second transmissive-reflection surface 343 to the second display lens 2033. In this embodiment, the second reflection surface 345 is a full reflection lens surface, so as to improve the reflectivity of the light.

[0069] Please refer to Figure 5When in use, the light emitted by the display 10 penetrates the second anti-reflection surface 341, reaches the second trans-reflective surface 343 and is reflected by the second trans-reflective surface 343 to the second reflective surface 345, and then penetrates the second trans-reflective surface 343 and reaches the second display lens 2033 to form a virtual image on the second display lens 2033.

[0070] In the embodiment, the light emitted by the display 10 is reflected by the first trans-reflective surface 323 and the first reflective surface 325 and then projected onto the first display lens 2031, and the light emitted by the display 10 is reflected by the second trans-reflective surface 343 and the second reflective surface 345 and then projected onto the second display lens 2033, so that the imaging of the data information played by the display 10 is avoided, the magnification of the image is realized, and the viewing experience of the user is improved.

[0071] The head-mounted display device 200 provided in the embodiment of the present application has the display system 100 arranged at a position between the first display lens 2031 and the second display lens 2033, so that the display system 100 can respectively project data information (such as image, video, text and the like) to the first display lens 2031 and the second display lens 2033, the structure of the head-mounted display device 200 is simplified, the head-mounted display device 200 is more portable, the user experience is improved, and a binocular image can be formed by reflecting the data information played by the display 10 to the first display lens 2031 and the second display lens 2033 through the first optical element 32 and the second optical element 34, so that the viewing experience of the user is improved and the system power consumption is reduced.

[0072] Please refer to Figure 6 , Figure 6 The principle schematic diagram of the display system 300 provided in the second embodiment of the present application is shown. In the embodiment, the structure of the display system 300 is substantially the same as that of the display system 100 provided in the first embodiment, and the difference is that the display 10 and the display lens 203 of the display system 300 are arranged at intervals, the first optical element 32 and the second optical element 34 are arranged between the display lens 203 and the display 10, and the display system 300 further includes a first imaging mirror 52 and a second imaging mirror 54.

[0073] Specifically in the embodiment shown in Figure 6 and Figure 7 , the display system 300 includes the display 10, the first optical element 32, the second optical element 34, the first imaging mirror 52 and the second imaging mirror 54. The positional relationship among the display 10, the first optical element 32 and the second optical element 34 can refer to the description of the corresponding positional relationship of the display system 300 in the first embodiment, and the present specification will not be described again.

[0074] In the present embodiment, the display 10 is disposed apart from the display lens 203 and corresponds to a position between the first display lens 2031 and the second display lens 2033 (i.e., corresponds to the center of symmetry O, such that the center of symmetry O passes through the display region 10 substantially perpendicularly).

[0075] The first optical element 32 and the second optical element 34 are disposed between the display 10 and the display lens 203, the first imaging mirror 52 is disposed opposite the first display lens 2031, and the second imaging mirror 54 is disposed opposite the second display lens 2033. When the display system 300 is in operation, the display 10 plays data information (such as image content, text content, video content, etc.), which can be projected to the first optical element 32 and the second optical element 34 and reflected by the first optical element 32 and the second optical element 34 to the first imaging mirror 52 and the second imaging mirror 54, which then reflect the data information to the display lens 203 to form a virtual image, so that a user can view the played data information on the display lens 203.

[0076] Further, the first optical element 32 and the second optical element 34 are disposed on a side of the display 10 facing the display lens 203. In the present embodiment, the structure of the first optical element 32 and the second optical element 34 can refer to the description of the corresponding structure of the display system 300 in the first embodiment, and the present specification will not be repeated here.

[0077] The first imaging mirror 52 and the second imaging mirror 54 are respectively disposed on opposite sides of the display 10, and the first imaging mirror 52 is disposed opposite the first display lens 2031, and the second imaging mirror 54 is disposed opposite the second display lens 2033. The first optical element 32 is adjacent to the first imaging mirror 52 to reflect the data information played by the display 10 to the first imaging mirror 52, and the second optical element 34 is adjacent to the second imaging mirror 54 to reflect the data information played by the display 10 to the second imaging mirror 54. Specifically, in the present embodiment, the first imaging mirror 52 and the second imaging mirror 54 are both plane mirrors with full reflection to obtain better imaging effect.

[0078] The head-mounted display device 200 provided in the embodiment is configured by arranging the display system 300 at a position between the first display lens 2031 and the second display lens 2033, so that the display system 100 can respectively deliver data information (such as image, video, text and the like) to the first display lens 2031 and the second display lens 2033, and the structure of the head-mounted display device 200 is simplified, the head-mounted display device 200 is more portable, and the user experience is improved. Further, the data information played by the display 10 is reflected to the first imaging mirror 52 and the second imaging mirror 54 through the first optical element 32 and the second optical element 34, and then the data information is reflected to the first display lens 2031 and the second display lens 2033, so that a binocular image is formed, which is beneficial to improve the user's viewing experience and reduce the system power consumption.

[0079] Please refer to Figure 8 , Figure 8 The principle schematic diagram of the display system 400 provided in the third embodiment of the present application is shown, and the display system 400 of the third embodiment is substantially the same as the display system 300 of the second embodiment, and both of them include the display 10, the first optical element 32, the second optical element 34, the first imaging mirror 52 and the second imaging mirror 54. The display system 400 of the third embodiment is different from the display system 300 of the second embodiment in that the display system 400 further includes the light-transmitting piece 72 and the support piece 74, and the light-transmitting piece 72 and the support piece 74 are connected with the first optical element 32 and the second optical element 34. The light-transmitting piece 72 and the support piece 74 are used to support the first optical element 32 and the second optical element 34, and together form a relatively stable quadrangular prism optical structure (as shown in Figure 9 、 Figure 10 indicated).

[0080] Specifically in the embodiments shown in Figure 8 and Figure 9 , the light-transmitting piece 72 is arranged between the display 10 and the first optical element 32 and the second optical element 34. The light-transmitting piece 72 is used to support the first optical element 32 and the second optical element 34. In the present embodiment, the light-transmitting piece 72 is an anti-reflection lens, which can also be used to improve the light transmittance of the light rays directed to the first optical element 32 and the second optical element 34, so as to improve the imaging effect of the display system 400. Further, in the present embodiment, the light-transmitting piece 72 is substantially a triangular prism structure (or a transparent triangular prism structure), which is attached to the first anti-reflection surface 321 and the second anti-reflection surface 341. The surface of the light-transmitting piece 72 can be provided with an anti-reflection film layer, or the light-transmitting piece 72 can be doped with an anti-reflection material, so as to facilitate the improvement of the light transmittance.

[0081] The support 74 is disposed on the side of the first optical element 32 and the second optical element 34 away from the display 10, and is disposed opposite to the light-transmitting member 72. Specifically, the support 74 is substantially a triangular prism structure, which is attached to the first reflecting surface 325 and the second reflecting surface 345, and forms a quadrangular prism optical element together with the first optical element 32, the second optical element 34 and the light-transmitting member 72 (see Figure 10 ). Further, the surface of the support 74 facing the first optical element 32 and the second optical element 34 can be coated with a total reflection mirror surface material to facilitate the reflection of light by the first reflecting surface 325 and the second reflecting surface 345, or the support 74 can also be made of a non-light-transmitting material.

[0082] In this embodiment, the light-transmitting member 72 and the support 74 are used to support the first optical element 32 and the second optical element 34, and form a relatively stable quadrangular prism optical structure together with the first optical element 32 and the second optical element 34, which facilitates the production and assembly of the optical structure and improves the stability of the display system 400.

[0083] Please refer to Figure 11 , Figure 11 Fig. 4 shows a schematic diagram of a display system 500 according to a fourth embodiment of the present application. The display system 500 of the fourth embodiment is substantially the same as the display system 300 of the second embodiment, and also includes the display 10, the first optical element 32, the second optical element 34, the first imaging mirror 52 and the second imaging mirror 54. The display system 500 of the fourth embodiment is different from the display system 300 of the second embodiment in that the display system 500 further includes a shutter 80 disposed on the light path from the display 10 to the display lens 103, which is used to control the on-off of light to form a first eye image (such as a left eye image) or a second eye image (such as a right eye image), so that the user can observe a stereoscopic display effect from the display lens 203.

[0084] Further, in this embodiment, the display 10 is used to alternately play the first eye image and the second eye image. Further, when the display 10 plays data information, the frame number of the image is greater than or equal to 60 fps, for example, the frame number of the image played by the display 10 is 120 fps, so that the first eye image and the second eye image can be alternated at a high frequency, and the display effect of the stereoscopic image is ensured.

[0085] Specifically in Figure 11In the embodiment shown, the shutter 80 includes a first shutter 82 and a second shutter 84, and a shutter controller (not shown in the figure). The first shutter 82 is arranged on the side of the first optical element 32 facing the first display lens 2031, and the second shutter 84 is arranged on the side of the second optical element 34 facing the second display lens 2033. The shutter controller is electrically connected to the first shutter 82 and the second shutter 84, and is configured to control the opening and closing of the first shutter 82 and the second shutter 84.

[0086] The opening and closing of the first shutter 82 and the second shutter 84 are set according to the playing content of the display 10. When the display 10 plays the first-eye image, the shutter controller controls the first shutter 82 to open and the second shutter 82 to close, so that the first-eye image played by the display 10 can be reflected by the first imaging mirror 52 to the first display lens 2031 and projected into the first eye of the user via the first display lens 2031. When the display 10 plays the second-eye image, the shutter controller controls the second shutter 84 to open and the first shutter 82 to close, so that the second-eye image played by the display 10 can be reflected by the second imaging mirror 34 to the second display lens 2033 and projected into the second eye of the user via the second display lens 2033. Therefore, when the user watches the image through the display device 200, the display 10 alternately plays the first-eye image and the second-eye image, and the first shutter 82 and the second shutter 84 alternately open and close, so that the first-eye image and the second-eye image seen by the user's eyes are superimposed on each other by the effect of human visual persistence, thereby enabling the user to see a stereoscopic image. Further, the alternating frequency of the first-eye image and the second-eye image played by the display 10 can be set according to actual needs, for example, the alternating frequency can be 60HZ.

[0087] In some embodiments, the first shutter 82 and the second shutter 84 can be liquid crystal screens, also known as liquid crystal light valves. The liquid crystal screen is energized to become black under forward voltage excitation, so as to block the light entering the human eye, and the liquid crystal screen is energized to become transparent under reverse voltage excitation, so as to allow the light to enter the human eye, thereby realizing the opening and closing of the shutter 80. It can be understood that in other embodiments, the shutter 80 can be any device capable of quickly controlling the on-off of light.

[0088] In the embodiment, the shutter 80 is disposed adjacent to the first optical element 32 and the second optical element 34. It can be understood that in other embodiments, the shutter 80 can also be disposed at other positions, i.e., the position of the shutter 80 is not limited, as long as the first shutter 82 is disposed on the light path corresponding to the first display lens 2031 (for example, the light path from the display 10 to the first optical element 32, the light path from the first imaging mirror 52 to the first display lens 2031) and the second shutter 84 is disposed on the light path corresponding to the second display lens 2033 (for example, the light path from the display 10 to the second optical element 34, the light path from the second imaging mirror 54 to the second display lens 2033), so as to facilitate the display system 500 to form a stereoscopic image. For example, the first shutter 82 can be disposed on the side of the first imaging mirror 52 facing the first display lens 2031, and the second shutter 84 can be disposed on the side of the second imaging mirror 54 facing the second display lens 2033 (as shown in Figure 12 FIG. 2B). Alternatively, the first shutter 82 can be disposed on the side of the first anti-reflection lens 321 facing the display 10, and the second shutter 84 can be disposed on the side of the second anti-reflection lens 341 facing the display 10. Of course, the shutter 80 can also be disposed on the display lens 203, for example, the first shutter 82 can be disposed on the surface of the first display lens 2031 or the side facing the user's eye, and the second shutter 84 can be disposed on the surface of the second display lens 2033 or the side facing the user's eye.

[0089] The display system 500 provided in the embodiment controls the light path entering the user's eye by using the first shutter 82 and the second shutter 84, so that the user can alternately see the first eye image and the second eye image. The display 10 does not need to be divided into a first eye image part and a second eye image part, so that the display 10 can display the first eye image or / and the second eye image in full screen, expands the field of view of the display system 500, and enables the display system 500 to have a larger depth of field, thereby improving the user's visual experience. At the same time, since the display 10 does not need to be divided into a first eye image part and a second eye image part, there is no vertical stripe blocking the user's view when the user watches, further improving the user's visual experience.

[0090] Please refer to Figure 13 , Figure 13FIG2 shows a schematic diagram of the principle of a display system 600 provided in a fifth embodiment of the present application. The display system 600 in the fifth embodiment has substantially the same structure as the display system 300 in the second embodiment, and also includes a display 10, a first optical element 32, a second optical element 34, a first imaging mirror 52, and a second imaging mirror 54. The display system 600 in the fifth embodiment differs from the display system 300 in the second embodiment in that the display system 600 further includes a polarizer 90, which is disposed on the optical path from the display 10 to the display lens 203. The polarizer 90 is used to control the on-off of light to form a first-eye image (e.g., a left-eye image) or a second-eye image (e.g., a right-eye image), thereby achieving a stereoscopic display effect.

[0091] In this embodiment, the display 10 is a three-dimensional stereoscopic display. Furthermore, the display 10 is a polarized stereoscopic display, a passive stereoscopic display that is flicker-free and reduces eye fatigue caused by prolonged viewing. The display 10 is configured to display polarized light of different angles on different pixel columns. This allows only light with the same polarization direction as the polarizer 90 to pass through the polarizer 90 and ultimately enter the human eye. This ultimately allows the user's first and second eyes to receive different images, thereby creating three-dimensional vision. It is understood that in other embodiments, the display 10 may include a polarized stereoscopic display screen configured to display polarized light of different angles on different pixel columns.

[0092] Specifically in Figure 13 In the illustrated embodiment, the polarizer 90 includes a first polarizer 92 and a second polarizer 94. The first polarizer 92 is disposed on the side of the first optical element 32 facing the first display lens 2031, and the second polarizer 94 is disposed on the side of the second optical element 34 facing the second display lens 2033. The polarization direction of the first polarizer 92 is different from the polarization direction of the second polarizer 94. Furthermore, the polarization direction of the first polarizer 92 and the polarization direction of the second polarizer 94 are orthogonal to each other.

[0093] When the display 10 plays data information, it emits light polarized along a first direction to display a first-eye image, and simultaneously emits light polarized along a second direction to display a second-eye image. The first direction is the same as the polarization direction of the first polarizer 92, and the second direction is the same as the polarization direction of the second polarizer 94. Therefore, the first-eye image played by the display 10 can pass through the first polarizer 92 and ultimately form an image on the first display lens 2031. At this time, the first-eye image cannot pass through the second polarizer 94, so the user's first eye can see the first-eye image through the first display lens 2031. The second-eye image played by the display 10 can pass through the second polarizer 681 and ultimately form an image on the second display lens 2033. At this time, the second-eye image cannot pass through the first polarizer 92, so the user's second eye can see the second-eye image through the second display lens 2033. Therefore, when a user views an image via the display system 600, the first-eye image and the second-eye image seen by both eyes are superimposed in the user's brain, allowing the user to perceive a stereoscopic image.

[0094] In this embodiment, the polarizer 90 is disposed adjacent to the first optical element 32 and the second optical element 34. It is understood that in other embodiments, the polarizer 90 may be disposed at other locations. That is, the location of the polarizer 90 is not limited, but the first polarizer 92 is disposed on the optical path corresponding to the first display lens 2031 (for example, the optical path from the display 10 to the first optical device 32, and the optical path from the first imaging lens 52 to the first display lens 2031), and the second polarizer 94 is disposed on the optical path corresponding to the second display lens 2033 (for example, the optical path from the display 10 to the second optical device 34, and the optical path from the second imaging lens 54 to the second display lens 2033), so as to facilitate the display system 600 to form a three-dimensional image. For example, the first polarizer 92 may be disposed on the side of the first imaging lens 52 facing the first display lens 2031, and the second polarizer 94 may be disposed on the side of the second imaging lens 54 facing the second display lens 2033 (for example, Figure 14 Alternatively, the first polarizer 92 can be disposed on the side of the first amplifying lens 321 facing the display 10, and the second polarizer 94 can be disposed on the side of the second amplifying lens 341 facing the display 10. Of course, the polarizer 90 can also be disposed on the display lens 203. For example, the first polarizer 92 can be disposed on the surface of the first display lens 2031 or on the side facing the user's eyes, while the second shutter 94 can be disposed on the surface of the second display lens 2033 or on the side facing the user's eyes.

[0095] The display system 600 provided by the embodiment controls the light channel into the user's eyes by using the polarization stereoscopic display 10, the first polarizer 92 and the second polarizer 94, so that the user's first and second eyes can see the first-eye image and the second-eye image respectively. The display 10 does not need to be divided into a first-eye image part and a second-eye image part, so that the display 10 can display the first-eye image and the second-eye image in full screen, the field of view of the visual display system 600 is expanded, the visual display system 600 can have a greater depth of field, and the user's visual experience is improved. Meanwhile, since the display 10 does not need to be divided into a first-eye image part and a second-eye image part, there are no vertical stripes blocking the line of sight when the user watches, and the user's visual experience is further improved.

[0096] Please refer to Figure 15 , Figure 15 Fig. 1 shows a schematic diagram of one use state of the head-mounted display device 200 and the display system thereof provided by the present application. When the user wears the head-mounted display device 200 to navigate, the display system is used to play data information 703 (such as navigation information, or / and road condition information, or / and environmental information). At this time, the user can observe the environmental condition 701 in front of him through the display lens 203, and can observe the above-mentioned data information 703 in the lens 203.

[0097] Further, in Figure 15 , the block diagram 700 is a schematic diagram of the content observed by the user through the lens 203. The display lens 203 forms a display area 2035, which is used to display the above-mentioned data information 703. The position of the display area 2035 on the display lens 203 is not limited to display, and it can occupy part of the display lens 203 or cover the whole surface of the display lens 203.

[0098] The head-mounted display device 200 provided by the present application is used for the user to wear on the head. No matter what posture the user adopts or where the user is, the position of the user's eyes relative to the head-mounted display device 200 is always substantially fixed, so that the image effect presented by the head-mounted display device 200 is well guaranteed, thereby avoiding the inconvenience of the conventional 3D display when the user needs to sit / stand at a fixed position.

[0099] Further, the above-mentioned head-mounted display device 200 can be applied to the field of augmented reality, allowing the user to use it with a head tracker, which is conducive to realizing a more realistic stereoscopic vision effect.

[0100] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the same; although the present application has been described in detail with reference to the foregoing examples, those of ordinary skill in the art will understand that they can still modify the technical solutions described in the foregoing examples, or make equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A display system, applied to a head-mounted display device, characterized in that: The display system comprises: a display for providing display data information; a first optical element arranged on one side of the display for projecting the display data information provided by the display to a first display lens of the head-mounted display device; and a second optical element opposite to the first optical element and arranged on the same side of the display as the first optical element; the second optical element is used for projecting the display data information provided by the display to a second display lens of the head-mounted display device, wherein the second display lens is arranged side by side with the first display lens. The first optical element comprises a first transmissive-reflection surface, a first reflection surface and a first anti-reflection surface; the first transmissive-reflection surface is arranged on the side of the first optical element close to the first display lens; the first reflection surface is arranged on the side of the first optical element away from the display; and the first anti-reflection surface is arranged on the side of the first optical element facing the display; the second optical element comprises a second transmissive-reflection surface, a second reflection surface and a second anti-reflection surface; the second transmissive-reflection surface is arranged on the side of the second optical element close to the second display lens; the second reflection surface is arranged on the side of the second optical element away from the display; and the second anti-reflection surface is arranged on the side of the second optical element facing the display. One side edge of the second anti-reflection surface is in contact with or connected to one side edge of the first anti-reflection surface, so as to form an included angle between the first anti-reflection surface and the second anti-reflection surface, the opening direction of the included angle is towards the display, and the included angle is less than or equal to 135 degrees.

2. The display system of claim 1, wherein, The first optical element and the second optical element are arranged side by side on one side of the display surface of the display.

3. The display system of claim 1, wherein, The first optical element and the second optical element are both in a triangular prism structure.

4. The display system of claim 1, wherein, The angle between the plane where the first anti-reflection surface is located and the plane where the display surface of the display is located is greater than or equal to 45 degrees; and the angle between the plane where the second anti-reflection surface is located and the plane where the display surface of the display is located is greater than or equal to 45 degrees.

5. The display system of claim 1, wherein, The display system further comprises a light-transmitting member arranged on the side of the display facing the first optical element and the second optical element and connected to the first optical element and the second optical element respectively. Or / and, the display system further comprises a support member arranged on the side of the first optical element and the second optical element away from the display and connected to the first optical element and the second optical element respectively.

6. The display system of claim 1, wherein, The display system further comprises a first imaging lens and a second imaging lens arranged on opposite sides of the display respectively; the first imaging lens is used for projecting the display data information provided by the display through the first optical element to the first display lens; and the second imaging lens is used for projecting the display data information provided by the display through the second optical element to the second display lens.

7. The display system of claim 1, wherein, The display system further comprises a first shutter and a second shutter, the first shutter is arranged on the light path of the light emitted by the display to the first display lens via the first optical element, and the second shutter is arranged on the light path of the light emitted by the display to the second display lens via the second optical element. The display is configured to alternately play a first eye image and a second eye image, and the first shutter and the second shutter are configured to alternately open and close.

8. The display system of claim 7, wherein, The first shutter is arranged on the side of the first transflector away from the second optical element, and the second shutter is arranged on the side of the second transflector away from the first optical element.

9. The display system of claim 1, wherein, The display system further comprises a first polarizer and a second polarizer, the first polarizer is arranged on the light path of the light emitted by the display to the first display lens via the first optical element, and the second polarizer is arranged on the light path of the light emitted by the display to the second display lens via the second optical element, the polarization directions of the first polarizer and the second polarizer are different, the display is configured to emit light polarized in a first direction to display a first eye image and emit light polarized in a second direction to display a second eye image, 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.

10. The display system of claim 9, wherein, The first polarizer is arranged on the side of the first transflector away from the second optical element, and the second polarizer is arranged on the side of the second transflector away from the first optical element.

11. A head-mounted display device, comprising a frame and a display lens connected to the frame, characterized in that: The display lens comprises a first display lens and a second display lens arranged side by side with the first display lens, and the head-mounted display device further comprises the display system of any one of claims 1-10, and the display system is arranged between the first display lens and the second display lens.

Images