Head mounted display assembly and related method for adjusting interpupillary distance

Abstract

The disclosed head mounted display assembly may include a first eye cup and a second eye cup, the first eye cup and the second eye cup being configured to position a first lens and a second lens, respectively, in front of an expected position of a user's eyes when the head mounted display assembly is worn. The first eye cup and the second eye cup may be movable relative to each other to adjust according to the interpupillary distance of the user's eyes. A single near eye display screen may be configured to display an image to the user through the first eye cup and the second eye cup. A closure portion above the single near eye display screen may include a first transparent component located between the first lens and the single near eye display screen and a second transparent component located between the second lens and the single near eye display screen. Various other methods, devices, systems, and assemblies are also disclosed.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of U.S. Provisional Patent Application Serial No. 63 / 007,586, filed on April 9, 2020, entitled “HEAD-MOUNTED DISPLAY ASSEMBLIES AND RELATED METHODS FOR INTERPUPILLARY DISTANCE ADJUSTMENTS,” U.S. Provisional Patent Application Serial No. 62 / 929,932, filed on November 3, 2019, entitled “HEAD-MOUNTED DISPLAY ASSEMBLIES AND RELATED METHODS FOR INTERPUPILLARY DISTANCE ADJUSTMENTS,” and U.S. Non-Provisional Patent Application Serial No. 17 / 075,028, filed on October 20, 2020, entitled “HEAD-MOUNTED DISPLAY ASSEMBLIES AND RELATED METHODS FOR INTERPUPILLARY DISTANCE ADJUSTMENTS,” the entire disclosure of each of which is incorporated herein by reference.

[0003] background

[0004] Artificial reality systems, such as virtual reality systems or augmented reality systems, typically display computer-generated content to users to create an immersive experience. The content can be displayed on a head-mounted display ("HMD") screen. For example, a virtual reality system can create a three-dimensional rendering to simulate an environment or virtual space. Alternatively, an augmented reality system can merge computer-generated content with the real-world environment seen by the user to enhance interaction with the real-world environment. These systems can provide users with the ability to browse and change digital content, which can provide useful information about real-world objects. HMD systems sometimes include two optical lenses, one for each eye, and the two optical lenses are located in front of the screen. The lens can magnify the image displayed on the screen and / or provide appropriate focus for the image displayed on the screen. Contaminants on the lens or screen (e.g., dust particles, fingerprints, etc.) may undesirably block or otherwise blur part of the displayed image. Moving parts in the HMD system sometimes cause or move contaminants in front of the displayed image.

[0005] Different users have different head and face shapes and sizes. For example, the eyes of a particular user may be positioned closer or farther from each other than other users. The distance between the centers of the pupils of an HMD user is generally referred to as "inter-pupillary distance" or "IPD". Positioning the lens to match the IPD of a particular user improves the picture quality for that user. In order to accommodate different IPDs, some HMDs include a mechanism for adjusting the IPD setting and thus adjusting the relative position between the optical lenses. Some HMDs include two independent screens coupled to two corresponding lenses. Each lens and screen pair can be moved relative to another lens and screen pair to adjust according to the IPD. Each lens and screen pair can include a sealed interior to inhibit the introduction of contaminants, thereby improving or maintaining picture quality. However, it is generally more expensive to integrate two such screens into an HMD than a single screen. However, conventional HMD systems with one screen and IPD adjustment capabilities generally have a structure that may allow contaminants to be introduced onto the screen and / or the screen side of the lens.

[0006] Overview

[0007] According to a first aspect, a head-mounted display assembly is provided, comprising: a first eye cup and a second eye cup, the first eye cup and the second eye cup being configured to position a first lens and a second lens, respectively, in front of an expected position of a user's eyes when the user wears the head-mounted display assembly; a single near-eye display screen, the single near-eye display screen being configured to display an image to the user through the first eye cup and the second eye cup; and an enclosure located above the single near-eye display screen, the enclosure comprising: a first transparent component located between the first lens and the single near-eye display screen and a second transparent component located between the second lens and the single near-eye display screen, wherein the first eye cup and the second eye cup are movable relative to each other and relative to the first transparent component and the second transparent component to be adjusted according to the interpupillary distance of the user's eyes.

[0008] The first transparent component can be positioned at a first distance from the single near-eye display screen, and the second transparent component can be positioned at a second distance from the single near-eye display screen, wherein the second distance can be less than the first distance. Each of the first distance and the second distance can be in a range of about 10 mm to about 20 mm. The difference between the first distance and the second distance can be at least about 2 mm.

[0009] At least one of the first eye-cup or the second eye-cup may be movable relative to the single near-eye display screen.

[0010] The first transparent member and the second transparent member may include at least one of: a polymer material; a glass material; or a crystalline material.

[0011] The enclosure may include a hermetically sealed enclosure defined above the single near-eye display screen and below the first transparent member and the second transparent member.

[0012] The first transparent component and the second transparent component can be positioned at a distance from the single near-eye display screen so that for a user viewing the single near-eye display screen through the first lens and the second lens, contaminants placed on the first transparent component and the second transparent component are substantially out-of-focus.

[0013] The head mounted display assembly may also include a first sealing element between the first eye cup and the first transparent component and a second sealing element between the second eye cup and the second transparent component. The first sliding interface may be between the first sealing element and the first transparent component, and the second sliding interface may be between the second sealing element and the second transparent component. Alternatively, the first sliding interface may be between the first sealing element and the first eye cup, and the second sliding interface may be between the second sealing element and the second eye cup. Each of the first sealing element and the second sealing element may include at least one of: an elastomeric material; and a closed cell foam material.

[0014] The first eyecup may include a first sidewall and a first flange extending radially outward from the first sidewall adjacent to the first transparent component; the second eyecup may include a second sidewall and a second flange extending radially outward from the second sidewall adjacent to the second transparent component.

[0015] The head mounted display assembly may further include an interpupillary distance adjustment mechanism coupled to the first eye cup and the second eye cup for adjusting the distance between the first eye cup and the second eye cup. The head mounted display assembly may further include a stop mechanism configured to maintain the relative position of the first eye cup and the second eye cup after adjusting according to the interpupillary distance of the user's eyes.

[0016] The first eye-cup and the second eye-cup are movable relative to each other over a distance of up to about 10 millimeters.

[0017] According to a second aspect, a method of manufacturing a head-mounted display assembly is provided, the method comprising: hermetically sealing a first transparent component and a second transparent component over a single near-eye display screen to form a closure; slidably positioning a first eye cup supporting a first lens over the first transparent component; and slidably positioning a second eye cup supporting a second lens over the second transparent component, wherein the first eye cup and the second eye cup are positioned to move relative to each other and relative to the first transparent component and the second transparent component to adjust according to the interpupillary distance of the user's eyes when the user wears the head-mounted display assembly.

[0018] The method may also include positioning a first sealing element between the first eyecup and the first transparent component; and positioning a second sealing element between the second eyecup and the second transparent component.

[0019] The method may also include positioning the first transparent component at a first distance from the single near-eye display screen, and positioning the second transparent component at a second distance from the single near-eye display screen, wherein the second distance may be less than the first distance.

[0020] According to a third aspect, an artificial reality device is provided, comprising: a first eye cup, the first eye cup comprising a first lens; a second eye cup, the second eye cup comprising a second lens, wherein the first eye cup and the second eye cup are movable relative to each other to adjust according to the interpupillary distance of the user's eyes; a single near-eye display screen, the single near-eye display screen being configured to display an image to the user through the first eye cup and the second eye cup; at least one processor, the at least one processor being configured to render an image for display on the single near-eye display screen; and a closure portion, the closure portion being located above the single near-eye display screen, the closure portion comprising a first transparent component located between the first lens and the single near-eye display screen and a second transparent component located between the second lens and the single near-eye display screen, wherein the first transparent component and the second transparent component are stationary relative to the single near-eye display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings illustrate many example embodiments and are a part of the specification. Together with the following description, these drawings demonstrate and explain various principles of the present disclosure.

[0023] Figure 1A is a perspective view of a head mounted display assembly according to at least one embodiment of the present disclosure, and Figure 1B is a cross-sectional side view of a head mounted display assembly according to at least one embodiment of the present disclosure.

[0024] Figure 2 is a detailed cross-sectional side view of the head mounted display assembly of FIG. 1 with an optical lens in a first IPD setting according to at least one additional embodiment of the present disclosure.

[0025] Figure 3 is a detailed cross-sectional side view of the head mounted display assembly of FIG. 1 with the optical lens at a second IPD setting in accordance with at least one embodiment of the present disclosure.

[0026] Figure 4A and Figure 4B is a detailed cross-sectional view of a portion of a head mounted display assembly in accordance with at least some embodiments of the present disclosure.

[0027] Figure 5 is a perspective view of a head mounted display assembly according to at least one embodiment of the present disclosure.

[0028] Figure 6 is a front view of a head mounted display assembly according to at least one additional embodiment of the present disclosure.

[0029] Figure 7 According to at least one embodiment of the present disclosure Figure 6 A rear view of the detent mechanism of the head mounted display assembly.

[0030] Figure 8 yes Figure 7 Side view of the stop mechanism.

[0031] Fig. 9 is a perspective view of a portion of a head mounted display assembly including a position sensor in accordance with at least one embodiment of the present disclosure.

[0032] Fig.10 is a flow chart illustrating a method of manufacturing a head mounted display assembly in accordance with at least one embodiment of the present disclosure.

[0033] Fig.11 is a flow chart illustrating a method of adjusting the interpupillary distance of a head mounted display assembly in accordance with at least one embodiment of the present disclosure.

[0034] Fig.12 is an illustration of an exemplary virtual reality headset that may be used in conjunction with embodiments of the present disclosure.

[0035] Fig.13 is an illustration of an exemplary virtual reality environment according to an embodiment of the present disclosure.

[0036] Throughout the drawings, the same reference symbols and descriptions indicate similar but not necessarily identical elements. Although the example embodiments described herein allow for various modifications and alternative forms, specific embodiments are shown in the drawings as examples and will be described in detail herein. However, the example embodiments described herein are not intended to be limited to the specific forms disclosed. Instead, the present disclosure covers all modifications, equivalents, and alternatives that fall within the scope of the appended claims.

[0037] Detailed Description of Example Embodiments

[0038] The present disclosure generally relates to an HMD assembly that can include a single near-eye display ("NED") screen and two eye cups that are movable relative to each other to adjust according to the IPD of different users. An enclosure can be disposed over the single NED screen. The enclosure can include a first transparent component located between a first lens and the single NED screen and a second transparent component located between a second lens and the single NED screen.

[0039] The enclosure including the first transparent component and the second transparent component can provide a clean volume above a single NED screen to reduce contaminants on the screen while also allowing interpupillary accommodation. As will be explained in more detail below, embodiments of the present disclosure can allow IPD adjustment above a single sealed display screen. Compared to conventional HMD components with two independent display screens, a single display screen can reduce the cost of an HMD assembly with IPD adjustability. In addition, the enclosure above a single NED screen can help keep the screen clean and substantially free from contaminants, which otherwise may prevent a user from viewing blocked pixels of the display screen. Contaminants (e.g., dust, particles, other debris) that may exist between the first lens and the second lens and the corresponding first transparent component and the second transparent component may be substantially unfocused. Unfocused contaminants, if small enough, may be substantially invisible to the user. Even larger contaminants may be less visible than when the contaminants are located on the surface of the NED screen.

[0040] In some examples, the term "substantially" with respect to a given parameter, property, or condition may mean and include to the extent that one of ordinary skill in the art would understand that the given parameter, property, or condition satisfies a small degree of variance, such as within acceptable manufacturing tolerances. For example, depending on a particular parameter, property, or condition being substantially satisfied, the parameter, property, or condition may be satisfied by at least 90%, by at least 95%, or even by at least 99%.

[0041] Features from any of the embodiments described herein may be used in combination with each other according to the general principles described herein. These and other embodiments, features and advantages will be more fully understood by reading the following detailed description in conjunction with the accompanying drawings and claims.

[0042] The following will refer to Figure 1A-Figure 3 , provides a detailed description of various exemplary HMD components according to the present disclosure. Figure 4A and 4B , a detailed description of an example sliding interface for IPD adjustability of an HMD assembly of the present disclosure is provided below. Figure 5 , a detailed description of example HMD components according to further embodiments of the present disclosure will be provided below. Fig.10 and Fig.11 , detailed descriptions of example methods for manufacturing an HMD assembly and adjusting the IPD of an HMD assembly are provided below, respectively. Figure 8 and Fig. 9 , a detailed description of example artificial reality systems and environments that may be used in conjunction with the HMD components of the present disclosure will be provided below.

[0043] Figure 1A and Figure 1B An HMD assembly 100 is illustrated, which may include a first eyecup 102 and a second eyecup 104 positioned over a single NED screen 106 , with a closure 108 positioned between the eyecups 102 , 104 and the single NED screen 106 . Figure 2 Detailed views of certain components of the HMD assembly 100 are shown. Figure 1A-Figure 2 , the eye cups 102, 104, the single NED screen 106, and the closure 108 can be mounted on an HMD support frame 110, which can also support an eye support 112, which can be shaped and positioned to rest on the user's face when the user wears the HMD assembly 100. In some examples, a flexible shield 109 can be positioned over at least some portions (e.g., peripheral portions) of the eye cups 102, 104 to provide an aesthetic and / or dust-proof covering over underlying components of the HMD assembly 100.

[0044] In some examples, unless the context clearly indicates otherwise, relevant terms (such as "first", "second", "upper", "lower", "over", "underlying", etc.) may be used to clearly and conveniently understand the present disclosure and the drawings, and may not necessarily imply or rely on any particular preference, orientation, or order.

[0045] The eye cups 102, 104 can be configured to be positioned in front of the expected position of the user's eyes when the user wears the HMD assembly 100. For example, the first eye cup 102 can be configured for viewing a single NED screen 106 through the user's left eye, and the second eye cup 104 can be configured for viewing a single NED screen 106 through the user's right eye. The first eye cup 102 can support a first optical lens 114, and the second eye cup 104 can support a second optical lens 116. For example, each of the optical lenses 114, 116 can be a corrective ophthalmic lens (e.g., a positive power (i.e., magnification) lens, a negative power (i.e., reduction) lens, a lens for correcting aberrations, etc.), a zero-power optical lens, an adjustable (e.g., deformable) optical lens, a Fresnel lens, or another optical lens element. Optionally, an anti-reflective coating can be applied to the optical lenses 114, 116.

[0046] The first eyecup 102 may include a first rigid shell 118 that at least partially defines a first interior volume 120. Similarly, the second eyecup 104 may include a second rigid shell 122 that at least partially defines a second interior volume 124. The base of the first rigid shell 118 may include a first flange 126 that may extend radially outward from a sidewall of the first rigid shell 118. Similarly, the base of the second rigid shell 122 may include a second flange 128 that may extend radially outward from a sidewall of the second rigid shell 122.

[0047] The optical lenses 114, 116 may be sealed (e.g., hermetically sealed) against and supported by the rigid housings 118, 122. The optical lenses 114, 116 may be positioned to focus an image displayed by the single NED screen 106 to the user's eyes when the user wears the HMD assembly 100.

[0048] The enclosure 108 may include a first transparent member 130 located between the first optical lens 114 and the single NED screen 106 and a second transparent member 132 located between the second optical lens 116 and the single NED screen 106. The outer regions of the first transparent member 130 and the second transparent member 132 may be coupled to the eye-facing surface of the single NED screen 106 via a sealing structure 134 of the HMD support frame 110. Thus, the enclosure 108 may be defined by the first transparent member 130 and the second transparent member 132, the single NED screen 106, and the sealing structure 134. In some examples, the enclosure 108 may be an airtightly sealed enclosure to inhibit contaminants (e.g., particles) from being introduced onto the eye-facing surface of the single NED screen 106. For a user viewing the single NED screen 106 through the optical lenses 114, 116, contaminants that may be present above the first transparent member 130 and the second transparent member (e.g., outside of the enclosure 108) may be substantially out of focus.

[0049] As an example and not limitation, the first transparent component 130 and the second transparent component 132 may be the same material or two different materials, or include the same material or two different materials. The first transparent component 130 and the second transparent component 132 may include a glass material, a transparent polymer material (e.g., polycarbonate, polymethyl methacrylate, polyethylene terephthalate, cyclic olefin copolymer, polypropylene, styrene methyl methacrylate, styrene acrylonitrile resin, polystyrene, etc.) and / or a crystal material, etc. In some examples, the first transparent component 130 and the second transparent component 132 may be substantially flat and may exhibit substantially zero optical power. The first transparent component 130 and the second transparent component 132 may be stationary relative to the single NED screen 106, the eye support 112, and the sealing structure 134. By configuring the first transparent component 130 and the second transparent component 132 to be stationary relative to the single NED screen 106, the number of moving parts adjacent to the single NED screen 106, which may otherwise generate or move contaminants (e.g., particles), may be reduced.

[0050] A first sealing element 136 can be disposed between the first flange 126 and the first transparent member 130. A second sealing element 138 can be disposed between the second flange 128 and the second transparent member 130. The first sealing element 136 and the second sealing element 138 can be configured to allow the first eye cup 102 and the second eye cup 104 to move (e.g., slide) relative to the first transparent member 130 and the second transparent member 132, such as for adjusting an IPD setting of the HMD assembly 100. The first sealing element 136 and the second sealing element 138 can be configured to inhibit particles from entering the first interior volume 120 and the second interior volume 124.

[0051] By way of example and not limitation, the first sealing element 136 and the second sealing element 138 may each be an O-ring, a foam (e.g., closed-cell foam) ring, a foam ring bonded to a structural base (e.g., a foam ring bonded to a polyethylene terephthalate base), a V-ring, an X-ring, a gasket, etc. The material of the first sealing element 136 and the second sealing element 138 may be or include a polymer material, such as an elastomeric material, a foam material, a combination thereof, etc.

[0052] As described above, the first eye cup 102 and the second eye cup 104 can be movable relative to each other (e.g., in a direction parallel to the surface of the single NED screen 106, such as in a direction from Figure 1A and Figure 1BThe eye cups 102 and 104 may be configured to be movable relative to the single NED screen 106 (in the left and right directions of viewing angle) to adjust according to the IPD of the user's eyes. At least one of the eye cups 102 and 104 may also be movable relative to the single NED screen 106. In some embodiments, the first eye cup 102 and the second eye cup 104 may be movable relative to each other at a distance of up to about 10 mm. The eye cups 102 and 104 may be independently movable relative to the HMD support frame 110, or the eye cups 102 and 104 may be configured to move simultaneously inward (e.g., toward each other) or outward (e.g., away from each other) at substantially equal distances and rates relative to the single NED screen 106.

[0053] As shown in FIG. 1 as an example, one or more IPD input mechanisms 140 (e.g., switches, sliders, knobs, buttons, etc.) can be integrated into the HMD support frame 110 and configured to allow the user of the HMD assembly 100 to adjust the IPD of the eye cups 102, 104 according to preference. Alternatively or additionally, the IPD adjustment can be performed by one or more electromechanical actuators (e.g., linear actuators, rotary motors, etc.), which can be controlled by a computing system associated with the HMD assembly 100 or by manipulation of the (one or more) IPD input mechanisms 140 by the user.

[0054] First IPD Set IPD 1 It can correspond to when the first optical lens 114 and the second optical lens are in the first position (such as Figure 2 The first optical axis A of the first optical lens 114 is shown in FIG. 1 and the second optical axis A of the second optical lens 116 2 The distance between the second IPD setting IPD 2 It may correspond to when the first optical lens 114 and the second optical lens are in the second position (eg Figure 3 As shown), the first optical axis A 1 and the second optical axis A 2 In the example shown, the distance between the first IPD and the second IPD 1 In comparison, the first eye cup 102 and the second eye cup 104 set the IPD at the second IPD 2 Therefore, the first IPD sets the IPD 1 Can be used for users with generally wider IPD, while the second IPD sets the IPD 2 Can be used for different users with generally narrower IPD.

[0055] refer to Figure 2 and Figure 3 , the first transparent member 130 may be positioned at a first distance D from the single NED screen 106 1and the second transparent member 132 may be positioned at a second distance D from the single NED screen 106 2 As an example and not limitation, the first distance D 1 and the second distance D 2 Each of can be in the range of about 10 mm to about 20 mm.

[0056] In some embodiments, the first distance D 1 It may be different from the second distance D 2 For example, the first distance D 1 Can be compared to the second distance D 2 The first distance D is at least about 2 mm. 1 and the second distance D 2 The difference between the first and second eye cups 102 and 104 can be such that when the first eye cup 102 and the second eye cup 104 are brought together (eg, at the second IPD setting IPD 2 ), a portion of the first flange 126 and the second flange 128 between the first eye cup 102 and the second eye cup 104 can overlap, such as Figure 3 Therefore, the first distance D 1 and the second distance D 2 The difference between the first and second eyecups 102 and 104 can facilitate positioning of the first and second eyecups 102 and 104 closer together than would otherwise be possible without the difference because the first and second flanges 126 and 128 are at different levels, thereby setting the IPD at the second IPD. 2 There is no physical interference with each other.

[0057] The single NED screen 106 may include an electronic display screen for presenting visual content to a user. For example, the single NED screen 106 may include a liquid crystal display (LCD), a light emitting diode (LED) display, an organic LED (OLED) display, a waveguide for directing light from a projector to a user, and / or any other suitable type of display screen. In some embodiments, the single NED screen 106 may be configured to display corresponding stereoscopic images to the user through the first eye cup 102 and the second eye cup 104 to create the impression of a three-dimensional image.

[0058] Figure 4A A detailed cross-sectional view of a portion of HMD assembly 400A is shown. Figure 1A-Figure 3 The HMD assembly 100 described herein, Figure 4AThe HMD assembly 400A of the embodiment of the present invention may include a first eye cup 402 and a second eye cup 404 disposed on a first transparent component 420 and a second transparent component 432, respectively. The first eye cup 402 may include a first rigid shell 418, and the second eye cup 404 may include a second rigid shell 422. The first flange 426 may extend radially outward from the sidewall of the first rigid shell 418, and the second flange 428 may extend radially outward from the sidewall of the second rigid shell 422. The first sealing element 436 may be positioned between the first flange 426 and the first transparent component 430 to form a seal (e.g., an airtight seal) between the first eye cup 402 and the first transparent component 430. Similarly, the second sealing element 438 may be positioned between the second flange 428 and the second transparent component 432 to form a seal (e.g., an airtight seal) between the second eye cup 404 and the second transparent component 432.

[0059] As an example and not a limitation, the first flange 426 may include a first groove 442 in which a portion of the first sealing element 436 may be positioned. Thus, the first sealing element 436 may be coupled to the first flange 426 and may be movable with the first flange 426 relative to the first transparent member 430. The first sliding interface 444 may be between the first sealing element 436 and the first transparent member 430. Similarly, the second flange 428 may include a second groove 446 in which a portion of the second sealing element 438 may be positioned. The second sealing element 438 may be coupled to the second flange 428 and may be movable with the second flange 428 relative to the second transparent member 432. The second sliding interface 448 may be located between the second sealing element 438 and the second transparent member 432. In this case, in order to adjust according to the IPD of the user, the first eye cup 402 and the second eye cup 404 and the first sealing element 436 and the second sealing element 438 may be movable relative to the first transparent member 430 and the second transparent member 432.

[0060] Figure 4B The diagram shows a Figure 4ADetailed cross-sectional view of a portion of an HMD assembly 400B of a construction of an HMD assembly 400A. In this example, a first groove 442 can be located in the first transparent component 430, and a portion of the first sealing element 436 can be located in the first groove 442. Thus, a first sliding interface 444 can be between the first sealing element 436 and the first flange 426. Similarly, a second groove 446 can be located in the second transparent component 432, and a portion of the second sealing element 438 can be located in the second groove 446. Thus, a second sliding interface 448 can be between the second sealing element 438 and the second flange 428. In this case, in order to adjust according to the IPD of the user, the first eye cup 402 and the second eye cup 404 can be movable relative to the first transparent component 430 and the second transparent component 432 and relative to the first sealing element 436 and the second sealing element 438.

[0061] Figure 5 is a perspective view of a portion of an HMD assembly 500 according to another embodiment of the present disclosure. Figure 5 In order to better view the lower portion of the HMD assembly 500, some components of the HMD assembly 500 are removed. Figure 5 The HMD assembly 500 may be similar to that described above with reference to Figure 1A-Figure 3 1. For example, the HMD assembly 500 may include a first eye cup 502 and a second eye cup 504 positioned above a single NED screen 506. The eye cups 502, 504 and the single NED screen 506 may be coupled to and supported by an HMD support frame 510. The first eye cup 502 may include a first rigid shell 518, and the first optical lens 514 may be coupled to the first rigid shell 518. The second eye cup 504 may include a second rigid shell 522, a second optical lens (not shown for clarity in FIG. 1 ). Figure 5 504) can be coupled to a second rigid shell 522. The first rigid shell 518 can at least partially define a first interior volume 520 of the first eye cup 502. Similarly, the second rigid shell 522 can at least partially define a second interior volume 524 of the second eye cup 504.

[0062] The first eye cup 502 and the second eye cup 504 can be positioned on the closure portion 508 (at Figure 5 The closure 508 may be positioned over the single NED screen 506 and may be movable relative to the closure 508, which may be positioned over the single NED screen 506. The closure 508 may be hermetically sealed to inhibit the introduction of contaminants onto the user-facing surface of the single NED screen 506.

[0063] The eye cups 502, 504 may be movable relative to each other and / or relative to the single NED screen 506, for example, to adjust for a user's IPD. Figure 5 The HMD assembly 500 may also include an IPD adjustment mechanism 550, which may include a track 552 (e.g., a rod, a slide, etc.), a first IPD adjustment bracket 554 that slidably couples the first rigid shell 518 to the track 552, and a second IPD adjustment bracket 556 that slidably couples the second rigid shell 522 to the track 552. In some examples, the IPD adjustment mechanism 550 may also include one or more IPD input mechanisms (in Figure 5 504, 504 for IPD adjustment. In addition or alternatively, a cam, a pusher, an electromechanical actuator (e.g., a motor, a linear actuator, etc.) or other suitable components may be included to move the IPD adjustment brackets 554, 556 and the eye cups 502, 504 along the track 552.

[0064] like Figure 5 As shown, in some embodiments, the IPD adjustment brackets 554, 556 can each include two spaced apart slider elements 558 that engage with and move along the track 552 to provide adequate stability for the corresponding eye cups 502, 504. The slider elements 558 can engage with the track 552 in a manner that holds the eye cups 502, 504 in place after the IPD adjustment is made. In some examples, a stop mechanism 560 (at the end of the eye cup 502, 504) can be used to adjust the eye cup 502, 504 after the IPD adjustment is made. Figure 5 The eye cups 502, 504 are held in their relative positions by the stop mechanism 560 (shown in dashed lines in FIG. 1 ). For example, the stop mechanism 560 may include a ratchet, a friction interface, a pin and rack, or another suitable mechanism for maintaining the relative positions of the eye cups 502, 504. In some examples, the HMD assembly 500 may optionally include another set of tracks and IPD adjustment brackets located between the eye cups 502, 504 and the eye cups 502, 504. Figure 5 The track 552 and IPD adjustment brackets 554, 556 are shown on opposite sides, for example for additional mechanical stability.

[0065] Figure 66 is a front view of an HMD assembly 600, which can include a first eye cup 602 (e.g., a left eye cup for positioning a first optical lens over a left eye of an intended user) and a second eye cup 604 (e.g., a right eye cup for positioning a second optical lens over a right eye of an intended user) positioned over a single NED screen 605. As described above, an enclosure can be positioned between the eye cups 602, 604, and the single NED screen 605. The eye cups 602, 604 and the single NED screen can be mounted on an HMD support frame 608.

[0066] The eye cups 602, 604 can be movable relative to the HMD support frame 608 and / or relative to each other to adjust according to the user's IPD. For example, each of the eye cups 602, 604 can be slidably coupled to an upper track 606 (e.g., a rod, a slide, etc.) and movable along the upper track 606, and the upper track 606 can be mounted on the HMD support frame 608. The eye cups 602, 604 can also be slidably coupled to a first lower track 610 and a second lower track 612, respectively, and movable along the first lower track 610 and the second lower track 612, which can be mounted on the HMD support frame 608. The first lower track 610 and the second lower track 612 can be located on the opposite side of the eye cups 602, 604 from the upper track 606. As shown in FIG. Figure 6 As shown, in some examples, the first lower track 610 and the second lower track 612 can be independent of each other to accommodate the nose of the intended user. In other examples, the first lower track 610 and the second lower track 612 can be parts of a single, complete, integral track.

[0067] The HMD assembly 600 may also include a stop mechanism 614 to hold the eye cups 602, 604 in position relative to each other and relative to the HMD support frame 608. In some embodiments, the stop mechanism 614 may also be configured to keep each eye cup 602, 604 substantially equidistant from the lateral centerline of the HMD assembly 600. Figure 6 As shown, the stop mechanism 614 may include a first rack 616 extending inwardly from the first eye cup 602, a second rack 618 extending inwardly from the second eye cup 604, and a pinion 620 engaged with the first rack 616 and the second rack 618. The pinion 620 may be rotatably coupled to the HMD support frame 608. The teeth of the pinion 620 may engage with the teeth of the first rack 616 on a first side of the pinion 620, and engage with the teeth of the second rack 618 on an opposite second side of the pinion 620. Thus, when the first eye cup 602 is moved inwardly (e.g., from Figure 6 When the second eye cup 604 moves to the right (from the perspective of the eye), due to the rotation of the pinion 620, the second eye cup 604 can also move inward (for example, from Figure 6Similarly, when the first eye cup 602 moves outward (e.g., from Figure 6 When the second eye cup 604 moves to the left (from the perspective of the eye), due to the rotation of the pinion 620 in the opposite direction, the second eye cup 604 can also move outward (for example, from Figure 6 from the perspective of the camera, move right).

[0068] The stop mechanism 614 may include features that enable the eye cups 602, 604 to remain in place once moved. For example, the eye cups 602, 604 may be held in two, three, four, or five different positions by the stop mechanism 614. Figure 7 and Figure 8 An exemplary embodiment of a detent mechanism 614 capable of holding the eye cups 602, 604 in place is illustrated in FIG.

[0069] Figure 7 is a rear view of the stop mechanism 614, and Figure 8 614 is a side view of the stop mechanism 614. Figure 8 As shown in , the pinion 620 can be mounted on the stop base 622. Figure 7 and Figure 8 As shown, the stop base 622 may include a groove 624 in the back side of the stop base 622 opposite the pinion 620. One or more stop extensions 626 may be mounted to the HMD support frame 608 ( Figure 6 In the illustrated embodiment, there are two stop extensions 626, however in other embodiments a single stop extension 626 or more than two stop extensions 626 may be used. When the stop extension 626 and the groove 624 are aligned with each other, the stop extension 626 may be biased (e.g., spring loaded) toward the stop base 622 and positioned relative to at least one of the grooves 624 to protrude into the corresponding groove 624.

[0070] For example, Figure 7 and Figure 8 As shown in , the stop extension 626 may include a ball biased toward the stop base 622 by a coil spring 628. However, the stop extension 626 of the present disclosure is not limited to this configuration. In other embodiments, the stop extension 626 may have a cylindrical shape, a hemispherical shape, a pin shape, a shaft with rounded ends, a shaft with inclined ends (e.g., with a triangular or trapezoidal longitudinal cross-section), or any other suitable shape. In addition, the stop extension 626 can be biased toward the stop base 622 with a biasing element other than a coil spring, such as a leaf spring, an elastomer, or another suitable biasing element.

[0071] The stop mechanism 614 can be configured to position the eye cup 602 at a predetermined IPD setting. For example, the eye cups 602, 604 can be moved inwardly or outwardly by a user applying an inward or outward physical force directly on one or both of the eye cups 602, 604. In other embodiments, an IPD adjustment mechanism can be used, such as the one described above with reference to Figure 1A The IPD adjustment mechanism 140 or electromechanical actuator described above. When the eye cups 602, 604 ( Figure 6 ) moves inward or outward, the first rack 616 and / or the second rack 618 can interact with the pinion 620 to rotate the pinion 620. The rotation of the pinion 620 can in turn rotate the stop base 622. As the stop base 622 rotates, the stop extension 626 can overcome the biasing force applied by the coil spring 628 and be forced out of the corresponding groove 624. As the stop base 622 continues to rotate, the stop extension 626 can be biased into other adjacent grooves 624, providing a tactile indication (e.g., a click or a click) to the user that the eye cups 602, 604 are at a predetermined IPD setting. The grooves 624 can be sized and spaced to correspond to a certain number of predetermined IPD settings, such as two (e.g., large and small), three (e.g., large, medium and small), four or five predetermined IPD settings. In one example, the grooves 624 can be sized and spaced to correspond to a first small IPD setting of approximately 58 mm, a second medium IPD setting of approximately 63 mm, and a third large IPD setting of approximately 68 mm measured between the optical axes of the eye cups 602 , 604 .

[0072] Reference again Figure 6 In some examples, the HMD assembly 600 may also include an IPD indicator 630 to provide an indication of the current IPD setting. For example, the IPD indicator 630 may include a hole through a structure coupled to the first eye cup 602 or the second eye cup 604. Under the hole, there may be a visual indication of the IPD setting. For example, the visual indication may include the letters S, M, and L corresponding to small, medium, and large IPD settings. Other exemplary visual indications may include numbers (e.g., 1 to 5 corresponding to five IPD settings, or 58, 63, and 68 corresponding to IPD settings in millimeters, etc.), other letters (e.g., A to D corresponding to four IPD settings, "min", "med", and "max" corresponding to minimum, medium, and maximum IPD settings, etc.), colors (e.g., green, yellow, and red corresponding to three IPD settings, etc.), diagrams (e.g., showing eyes separated by different distances from each other, etc.), or combinations thereof. When the detent mechanism 614 is used to set the eye cups 602, 604 to one of the predetermined IPD settings, the aperture of the IPD indicator 630 may align with one of the visual indications of the IPD setting so that a user may view the visual indication through the aperture to determine the current IPD setting.

[0073] Even if the stop mechanism 614 is used, the HMD assembly 600 may benefit from a position sensor to accurately measure and / or verify the current IPD setting of the HMD assembly 600 . Fig. 9 A portion of an HMD assembly 900 is shown with an IPD position sensor 942. In some aspects, the HMD assembly 900 may be similar to Figure 6 For example, the HMD assembly 900 may include a first eye cup 902, a second eye cup 904, a single NED screen 905, a track 906 along which the eye cups 902, 904 may move to adjust the IPD setting, an HMD support frame 908, a stop mechanism 914, and an IPD indicator 930.

[0074] The IPD position sensor 942 may be configured to sense the lateral position of one or both of the eye cups 902, 904 relative to each other and / or relative to the HMD support frame 908. For example, the IPD position sensor 942 may include a Hall effect sensor, a rotary encoder, a linear encoder, or another suitable position sensor. Fig. 9 In the example shown, the IPD position sensor 942 is illustrated as a Hall effect sensor configured to sense the magnitude of the magnetic field of a moving magnet. The IPD position sensor 942 may include a probe 944 mounted to the HMD support frame 908 and a permanent magnet 946 mounted to one of the eye cups 902, 904. When the eye cups 902, 904 move laterally, the permanent magnet 946 may move relative to the probe 944. The movement of the permanent magnet 946 may result in a change in the magnitude of the magnetic field sensed by the probe 944. The magnitude change sensed by the probe 944 may be associated with the relative position between the probe 944 and the permanent magnet 946, and ultimately associated with the relative position between the eye cups 902, 904. Data from the IPD position sensor 942 may be used to determine the actual IPD setting of the eye cups 902, 904, such as being used by software to adjust the image displayed on the single NED screen 905 to provide an indication of the IPD setting to the user, etc.

[0075] exist Fig. 9In the embodiment illustrated in , the probe 944 is mounted on the HMD support frame 908, and the permanent magnet 946 is mounted on one of the eye cups 902, 904. However, the present disclosure is not limited to this configuration. In other embodiments, the probe 944 can be mounted on one of the eye cups 902, 904 and the permanent magnet 946 can be mounted on the HMD support frame 908, or the probe can be mounted on one of the eye cups 902, 904 and the permanent magnet 946 can be mounted on the other of the eye cups 902, 904. In yet another embodiment, the permanent magnet 946 can be replaced by a non-permanent magnet such as an electromagnet. In other embodiments, as described above, the IPD position sensor 942 can be another type of position sensor other than a Hall effect sensor.

[0076] Fig.10 1 is a flow chart illustrating a method 1000 of manufacturing an HMD assembly in accordance with at least one embodiment of the present disclosure. At operation 1010, a first transparent component and a second transparent component may be positioned and hermetically sealed over a single NED screen to form an enclosure. Operation 1010 may be performed in a variety of ways. For example, the first transparent component may be positioned at a first distance from the single NED screen, and the second transparent component may be positioned at a different second distance from the single NED screen. In some embodiments, the hermetic seal may be achieved by a sealing structure that may couple the transparent components to the single NED screen.

[0077] At operation 1020, a first eye cup supporting a first lens can be slidably positioned over the first transparent member. Operation 1020 can be performed in a variety of ways. For example, a first sealing element can be positioned between the first eye cup and the first transparent member. The first sliding interface can be between the first eye cup and the first sealing element, or alternatively, can be between the first transparent member and the first sealing element.

[0078] At operation 1030, a second eye cup supporting a second lens can be slidably positioned over the second transparent member. Operation 1030 can be performed in a variety of ways. For example, a second sealing element can be positioned between the second eye cup and the second transparent member. The second sliding interface can be between the second eye cup and the second sealing element, or alternatively, between the second transparent member and the second sealing element. The first eye cup and the second eye cup can be moved relative to each other, such as to adjust according to the IPD of a user of the HMD assembly. In some embodiments, the respective distances between a single NED screen and the first transparent member and the second transparent member can be different, such as allowing flanges extending radially outward from the eye cups to at least partially overlap each other when the IPD setting of the eye cups is in its minimum operating position.

[0079] In some examples, the method 1000 may further include additional operations. For example, an IPD adjustment mechanism may be assembled to the first eyecup and the second eyecup in a suitable position to move the first eyecup and the second eyecup relative to each other, for example, to adjust according to the IPD.

[0080] Fig.11 1 is a flow chart illustrating a method 1100 of adjusting the interpupillary distance of an HMD assembly according to at least one embodiment of the present disclosure. At operation 1110, a first eye cup may be moved over a first transparent member located over a single NED screen. At operation 1120, a second eye cup may be moved over a second transparent member located over the single NED screen. Operations 1110 and 1120 may be performed in a variety of ways. For example, the eye cups may be moved toward or away from each other to adjust according to the IPD of the user. The single NED screen, the first transparent member, and the second transparent member may define an airtightly sealed enclosure.

[0081] Thus, the present disclosure includes HMD assemblies and related methods that can achieve IPD adjustments that inhibit (e.g., reduce or eliminate) contaminants from being introduced onto a display screen. At the same time, the disclosed HMD assemblies can include a single NED screen, which can reduce the cost of manufacturing and operating the HMD assemblies. Various configurations and materials are disclosed, each of which can be advantageously used for a variety of uses and applications.

[0082] As described above, embodiments of the present disclosure may include or be implemented in conjunction with various types of artificial reality systems. Artificial reality content may include video, audio, tactile feedback, or some combination thereof, any of which may be presented in a single channel or multiple channels (such as stereoscopic video that produces a three-dimensional (3D) effect for the viewer). In addition, in some embodiments, artificial reality may also be associated with applications, products, accessories, services, or some combination thereof, which are used, for example, to create content in artificial reality and / or be used in other ways in artificial reality (e.g., to perform activities in artificial reality).

[0083] Artificial reality systems can be implemented in a variety of different form factors and configurations. Artificial reality systems can include NEDs that provide visibility into the real world (e.g., augmented reality systems) or visually immerse a user in an artificial reality (e.g., Fig.121200 in the virtual reality system 1200). While some artificial reality devices may be stand-alone systems, other artificial reality devices may communicate and / or coordinate with external devices to provide an artificial reality experience to a user. Examples of such external devices include handheld controllers, mobile devices, desktop computers, devices worn by a user, devices worn by one or more other users, and / or any other suitable external system.

[0084] As described above, some artificial reality systems can substantially replace one or more of a user's sensory perceptions of the real world with a virtual experience. An example of this type of system is a head-worn display system, such as Fig.12 The virtual reality system 1200 in FIG. 1 completely or nearly completely covers the user's field of view. The virtual reality system 1200 may include a front rigid body 1202 and a band 1204 shaped to fit around the user's head. The virtual reality system 1200 may also include output audio transducers 1206 (A) and 1206 (B). In addition, although in Fig.12 Not shown, but front rigid body 1202 may include one or more electronic components, including one or more electronic displays, one or more inertial measurement units (IMUs), one or more tracking transmitters or detectors, and / or any other suitable device or system for creating an artificial reality experience.

[0085] The artificial reality system may include multiple types of visual feedback mechanisms. For example, the display device in the virtual reality system 1200 may include one or more liquid crystal displays (LCDs), light emitting diode (LED) displays, organic LED (OLED) displays, and / or any other suitable type of display screen. As described above, the artificial reality system may include a single display screen for both eyes. Some artificial reality systems may also include an optical subsystem having one or more lenses (e.g., conventional concave or convex lenses, Fresnel lenses, adjustable liquid lenses, etc.) through which the user can view the display screen.

[0086] In addition to or instead of using a display screen, some artificial reality systems may include one or more projection systems. For example, a display device in the virtual reality system 1200 may include a micro-LED projector that projects light into the display device (using, for example, a waveguide), such as a transparent combination lens that allows ambient light to pass through. The display device can refract the projected light toward the user's pupil, and can enable the user to view both artificial reality content and the real world at the same time. The artificial reality system can also be configured with any other suitable type or form of image projection system.

[0087] The artificial reality system may also include various types of computer vision components and subsystems. For example, the virtual reality system 1200 may include one or more optical sensors, such as a two-dimensional (2D) or 3D camera, a time-of-flight depth sensor, a single-beam or scanning laser rangefinder, a 3D lidar sensor, and / or any other suitable type or form of optical sensor. The artificial reality system may process data from one or more of these sensors to identify the user's location, map the real world, provide the user with context about the real-world surroundings, and / or perform a variety of other functions.

[0088] The artificial reality system may also include one or more input and / or output audio transducers. Fig.12 In the example shown, the output audio transducers 1206(A) and 1206(B) may include voice coil speakers, ribbon speakers, electrostatic speakers, piezoelectric speakers, bone conduction transducers, cartilage conduction transducers, and / or any other suitable type or form of audio transducers. Similarly, the input audio transducers may include condenser microphones, dynamic microphones, ribbon microphones, and / or any other type or form of input transducers. In some embodiments, a single transducer may be used for both audio input and audio output.

[0089] Although in Fig.12 Not shown, but the artificial reality system may include a tactile (i.e., haptic) feedback system that can be incorporated into headwear, gloves, tights, handheld controllers, environmental devices (e.g., chairs, floor mats, etc.), and / or any other type of device or system. The tactile feedback system can provide various types of skin feedback, including vibration, force, traction, texture, and / or temperature. The tactile feedback system can also provide various types of kinesthetic feedback, such as motion and compliance. Tactile feedback can be implemented using motors, piezoelectric actuators, fluidic systems, and / or various other types of feedback mechanisms. The tactile feedback system can be implemented independently of other artificial reality devices, within other artificial reality devices, and / or in combination with other artificial reality devices.

[0090] By providing tactile sensations, audible content, and / or visual content, artificial reality systems can create entire virtual experiences or enhance users' real-world experiences in a variety of contexts and environments. For example, artificial reality systems can help or expand users' perception, memory, or cognition within a specific environment. Some systems can enhance users' interactions with other people in the real world, or can enable more immersive interactions with other people in the virtual world. Artificial reality systems can also be used for educational purposes (e.g., for teaching or training in schools, hospitals, government organizations, military organizations, commercial enterprises, etc.), entertainment purposes (e.g., for playing video games, listening to music, watching video content, etc.), and / or for auxiliary purposes (e.g., as hearing aids, visual aids, etc.). The embodiments disclosed herein can implement or enhance users' artificial reality experiences in one or more of these contexts and environments and / or in other contexts and environments.

[0091] As described above, the artificial reality system 1200 can be used with various other types of devices to provide a more engaging artificial reality experience. These devices may include a tactile interface with a transducer that provides tactile feedback and / or collects tactile information about the user's interaction with the environment. The artificial reality system disclosed herein may include various types of tactile interfaces that detect or convey various types of tactile information, including tactile feedback (e.g., feedback detected by the user through nerves in the skin, also referred to as skin feedback) and / or kinesthetic feedback (e.g., feedback detected by the user through receptors located in muscles, joints, and / or tendons).

[0092] Tactile feedback can be provided by an interface located within the user's environment (e.g., a chair, table, floor, etc.) and / or an interface on an item that the user can wear or carry (e.g., a glove, wristband, etc.). As an example, the vibrotactile system can be in the form of a wearable glove and / or wristband. The tactile device can include a flexible, wearable textile material that is shaped and configured to be positioned against the user's hand and wrist, respectively. The present disclosure also includes a vibrotactile system that can be shaped and configured to be positioned against other human body parts (e.g., fingers, arms, head, torso, feet, or legs). As an example and not limitation, the vibrotactile system according to various embodiments of the present disclosure can also be in the form of gloves, headbands, armbands, sleeves, head covers, socks, shirts, or pants, and there are other possibilities. In some examples, the term "textile" can include any flexible, wearable material, including woven fabrics, non-woven fabrics, leather, cloth, flexible polymer materials, composite materials, and the like.

[0093] Haptic wearable devices can be implemented in various types of artificial reality systems and environments. Fig.13An example artificial reality environment 1300 including a head mounted virtual reality display and two haptic devices (i.e., gloves) is shown, and in other embodiments, any number and / or combination of these and other components may be included in the artificial reality system. For example, in some embodiments, there may be multiple head mounted displays, each head mounted display having an associated haptic device, each head mounted display and each haptic device communicating with the same console, portable computing device, or other computing system.

[0094] Head mounted display 1302 generally represents any type or form of virtual reality system, such as Fig.12 1300 in the virtual reality system 1200. The haptic device 1304 generally represents any type or form of wearable device worn by a user of the artificial reality system that provides tactile feedback to the user to give the user the feeling that he or she is physically in contact with a virtual object. In some embodiments, the haptic device 1304 can provide tactile feedback by applying vibration, motion, and / or force to the user. For example, the haptic device 1304 can limit or enhance the movement of the user. To give a specific example, the haptic device 1304 can limit the forward movement of the user's hand so that the user has the feeling that his or her hand has physically contacted a virtual wall. In this particular example, one or more actuators within the haptic device can achieve physical movement restriction by pumping fluid into an inflatable bladder of the haptic device. In some examples, the user can also use the haptic device 1304 to send an action request to the console. Examples of action requests include, but are not limited to, requests to start an application and / or end an application and / or requests to perform a specific action within an application.

[0095] The haptic device 1304 may include any suitable number and / or type of haptic transducers, sensors, and / or feedback mechanisms. For example, the haptic device 1304 may include one or more mechanical transducers, piezoelectric transducers, and / or fluid transducers. The haptic device 1304 may also include various combinations of different types and forms of transducers that work together or independently to enhance the user's artificial reality experience.

[0096] As non-limiting examples, the following embodiments are included in the present disclosure.

[0097] Example 1: A head-mounted display assembly may include: a first eye cup and a second eye cup, which are configured to position a first lens and a second lens, respectively, in front of the expected position of the user's eyes when the user wears the head-mounted display assembly; a single near-eye display screen, which is configured to display an image to the user through the first eye cup and the second eye cup; and a closure portion, which is located above the single near-eye display screen, the closure portion including: a first transparent component located between the first lens and the single near-eye display screen and a second transparent component located between the second lens and the single near-eye display screen, wherein the first eye cup and the second eye cup are movable relative to each other and relative to the first transparent component and the second transparent component to adjust according to the interpupillary distance of the user's eyes.

[0098] Example 2: A head-mounted display assembly according to Example 1, wherein at least one of the first eye-cup or the second eye-cup is movable relative to the single near-eye display screen.

[0099] Example 3: A head-mounted display assembly according to Example 1 or Example 2, wherein the first transparent component is located at a first distance from a single near-eye display screen, and the second transparent component is located at a second distance from the single near-eye display screen, wherein the second distance is less than the first distance.

[0100] Example 4: A head-mounted display assembly according to Example 3, wherein each of the first distance and the second distance is in the range of about 10 mm to about 20 mm.

[0101] Example 5: A head-mounted display assembly according to Example 3 or 4, wherein the difference between the first distance and the second distance is at least about 2 mm.

[0102] Example 6: A head-mounted display assembly according to any one of Examples 1 to 5, wherein the first transparent component and the second transparent component may include at least one of the following: a polymer material; a glass material; or a crystalline material.

[0103] Example 7: A head-mounted display assembly according to any of Examples 1 to 6, wherein the enclosure can include an airtightly sealed enclosure defined above the single near-eye display screen and below the first transparent member and the second transparent member.

[0104] Example 8: A head-mounted display assembly according to any one of Examples 1 to 7, wherein the first transparent component and the second transparent component are positioned at a distance from a single near-eye display screen so that contaminants placed on the first transparent component and the second transparent component are substantially out of focus for a user viewing the single near-eye display screen through the first lens and the second lens.

[0105] Example 9: The head mounted display assembly of any of Examples 1 to 8 may further include a first sealing element positioned between the first eye cup and the first transparent component and a second sealing element positioned between the second eye cup and the second transparent component.

[0106] Example 10: A head-mounted display assembly according to Example 9, wherein the first sliding interface is located between the first sealing element and the first transparent component, and the second sliding interface is located between the second sealing element and the second transparent component.

[0107] Example 11: A head-mounted display assembly according to Example 9, wherein the first sliding interface is located between the first sealing element and the first eye cup, and the second sliding interface is located between the second sealing element and the second eye cup.

[0108] Example 12: A head-mounted display assembly according to any of Examples 9 to 11, wherein each of the first sealing element and the second sealing element can include at least one of the following: an elastomeric material; or a closed-cell foam material.

[0109] Example 13: A head-mounted display assembly according to any one of Examples 1 to 12, wherein: the first eye cup may include a first side wall and a first flange extending radially outward from the first side wall adjacent to the first transparent component; and the second eye cup may include a second side wall and a second flange extending radially outward from the second side wall adjacent to the second transparent component.

[0110] Example 14: According to any one of Examples 1 to 13, the head-mounted display assembly may also include an interpupillary distance adjustment mechanism, which is coupled to the first eye cup and the second eye cup and is used to adjust the distance between the first eye cup and the second eye cup.

[0111] Example 15: According to the head-mounted display assembly of Example 14, it may also include a stop mechanism configured to maintain the relative position of the first eye cup and the second eye cup after adjusting according to the interpupillary distance of the user's eyes.

[0112] Example 16: A head-mounted display assembly according to any of Examples 1 to 15, wherein the first eye-cup and the second eye-cup are movable relative to each other over a distance of up to about 10 mm.

[0113] Example 17: A method of manufacturing a head-mounted display assembly, the method may include: hermetically sealing a first transparent component and a second transparent component over a single near-eye display screen to form a closure; slidably positioning a first eye cup supporting a first lens over the first transparent component; and slidably positioning a second eye cup supporting a second lens over the second transparent component, wherein the first eye cup and the second eye cup are positioned to move relative to each other and relative to the first transparent component and the second transparent component to adjust according to the interpupillary distance of the user's eyes when the user wears the head-mounted display assembly.

[0114] Example 18: The method of Example 17, further comprising: positioning a first sealing element between the first eyecup and the first transparent component; and positioning a second sealing element between the second eyecup and the second transparent component.

[0115] Example 19: The method according to Example 17 or 18 may also include positioning the first transparent component at a first distance from a single near-eye display screen, and positioning the second transparent component at a second distance from the single near-eye display screen, wherein the second distance is less than the first distance.

[0116] Example 20: An artificial reality device may include: a first eye cup, the first eye cup including a first lens; a second eye cup, the second eye cup including a second lens, wherein the first eye cup and the second eye cup are movable relative to each other to adjust according to the interpupillary distance of the user's eyes; a single near-eye display screen, the single near-eye display screen configured to display an image to the user through the first eye cup and the second eye cup; at least one processor, the at least one processor configured to render an image for display on the single near-eye display screen; and an enclosure located above the single near-eye display screen, the enclosure including a first transparent component located between the first lens and the single near-eye display screen and a second transparent component located between the second lens and the single near-eye display screen, wherein the first transparent component and the second transparent component are stationary relative to the single near-eye display screen.

[0117] Example 21: A method for adjusting the interpupillary distance of a head-mounted display assembly, which may include: moving a first eye cup over a first transparent component located over a single near-eye display screen; and moving a second eye cup over a second transparent component located over the single near-eye display screen, wherein the single near-eye display screen, the first transparent component, and the second transparent component define an airtightly sealed enclosure.

[0118] The process parameters and order of steps described and / or illustrated herein are given as examples only and may be varied as desired. For example, although the steps illustrated and / or described herein may be shown or discussed in a particular order, the steps do not necessarily need to be performed in the order illustrated or discussed. The various exemplary methods described and / or illustrated herein may also omit one or more steps described or illustrated herein, or include additional steps in addition to the disclosed steps.

[0119] The foregoing description has been provided to enable others skilled in the art to best utilize the various aspects of the exemplary embodiments disclosed herein. This example description is not intended to be exhaustive or limited to any precise form disclosed. Many modifications and variations are possible without departing from the spirit and scope of the present disclosure. The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. In determining the scope of the present disclosure, reference should be made to the attached claims and their equivalents.

[0120] Unless otherwise indicated, the terms "connected to" and "coupled to" (and their derivatives) as used in the specification and claims should be interpreted as allowing both direct and indirect (i.e., via other elements or components) connections. In addition, the terms "a" or "an" as used in the specification and claims should be interpreted to mean "at least one of...". Finally, for ease of use, the terms "including" and "having" (and their derivatives) as used in the specification and claims are interchangeable with the word "comprising" and have the same meaning as the word "comprising".

Claims

1. A head mounted display assembly, comprising: a first eye cup and a second eye cup configured to position the first lens and the second lens, respectively, in front of the expected positions of the user's eyes when the user wears the head mounted display assembly; a single near-eye display screen configured to display images to the user through the first eyecup and the second eyecup; and A closure portion, which is above the single near-eye display screen, the closure portion comprising: a first transparent member located between the first lens and the single near-eye display screen; and a second transparent member located between the second lens and the single near-eye display screen, wherein the first eye cup and the second eye cup are movable relative to each other and relative to the first transparent component and the second transparent component to adjust according to the interpupillary distance of the user's eyes; Wherein, the first transparent component and the second transparent component are positioned at a distance from the single near-eye display screen, so that for a user viewing the single near-eye display screen through the first lens and the second lens, contaminants placed on the first transparent component and the second transparent component are substantially out of focus.

2. The head mounted display assembly of claim 1, wherein: The first transparent component is located at a first distance from the single near-eye display screen, and the second transparent component is located at a second distance from the single near-eye display screen, wherein the second distance is less than the first distance.

3. The head mounted display assembly of claim 2, wherein: Each of the first distance and the second distance is in the range of 10 mm to 20 mm and / or a difference between the first distance and the second distance is at least 2 mm.

4. The head mounted display assembly of claim 1, wherein: At least one of the first eye-cup or the second eye-cup is movable relative to the single near-eye display screen.

5. The head mounted display assembly of claim 1, wherein: The first transparent component and the second transparent component include at least one of the following: Polymer materials; Glass material; or Crystalline material.

6. The head mounted display assembly of claim 1, wherein: The enclosure includes a hermetically sealed enclosure defined above the single near-eye display screen and below the first transparent member and the second transparent member.

7. The head mounted display assembly of claim 1, further comprising a first sealing element between the first eye cup and the first transparent component and a second sealing element between the second eye cup and the second transparent component.

8. The head mounted display assembly of claim 7, wherein a first sliding interface is located between the first sealing element and the first transparent component, and a second sliding interface is located between the second sealing element and the second transparent component.

9. The head mounted display assembly of claim 7, wherein a first sliding interface is located between the first sealing element and the first eye cup, and a second sliding interface is located between the second sealing element and the second eye cup.

10. The head mounted display assembly of claim 7, wherein each of the first sealing element and the second sealing element comprises at least one of: Elastomeric materials; and Closed cell foam material.

11. The head mounted display assembly of claim 1 , wherein: The first eye cup includes a first side wall and a first flange, the first flange extending radially outward from the first side wall adjacent the first transparent member; and The second eyecup includes a second sidewall and a second flange extending radially outward from the second sidewall adjacent the second transparent member.

12. The head mounted display assembly of claim 1, further comprising an interpupillary distance adjustment mechanism coupled to the first eye cup and the second eye cup for adjusting a distance between the first eye cup and the second eye cup.

13. The head mounted display assembly of claim 12, further comprising a stop mechanism configured to maintain a relative position of the first eye cup and the second eye cup after adjustment according to the interpupillary distance of the user's eyes.

14. The head mounted display assembly of claim 1, wherein: The first eye-cup and the second eye-cup are movable relative to each other over a distance of at most 10 millimeters.

15. A method of manufacturing a head mounted display assembly, comprising: hermetically sealing the first transparent member and the second transparent member over the single near-eye display screen to form an enclosure; slidably positioning a first eye cup supporting a first lens on the first transparent component; as well as A second eye cup supporting a second lens is slidably positioned over the second transparent component, wherein the first eye cup and the second eye cup are positioned to move relative to each other and relative to the first transparent component and the second transparent component to adjust according to the interpupillary distance of the user's eyes when the user wears the head mounted display assembly.

16. The method according to claim 15, further comprising: positioning a first sealing element between the first eye cup and the first transparent member; and A second sealing element is positioned between the second eye cup and the second transparent member.

17. The method of claim 15, further comprising positioning the first transparent component at a first distance from the single near-eye display screen, and positioning the second transparent component at a second distance from the single near-eye display screen, wherein the second distance is less than the first distance.

18. An artificial reality device comprising: a first eyecup including a first lens; a second eyecup comprising a second lens, wherein the first eyecup and the second eyecup are movable relative to each other to adjust according to an interpupillary distance of an eye of a user; a single near-eye display screen configured to display images to the user through the first eyecup and the second eyecup; at least one processor configured to render an image for display on the single near-eye display screen; as well as A closure portion, which is above the single near-eye display screen, the closure portion comprising: a first transparent member located between the first lens and the single near-eye display screen; and a second transparent member located between the second lens and the single near-eye display screen, wherein the first transparent member and the second transparent member are stationary relative to the single near-eye display screen; Wherein, the first transparent component and the second transparent component are positioned at a distance from the single near-eye display screen, so that for a user viewing the single near-eye display screen through the first lens and the second lens, contaminants placed on the first transparent component and the second transparent component are substantially out of focus.

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