Electronic device with lens position sensing

Abstract

A head mounted device may have a display having an array of pixels that display content to a user. A head-mounted support structure in the device supports the array of pixels on the head of the user. A left locator may be used to locate a left lens assembly including a left lens and a first pixel array. A right locator may be used to locate a right lens assembly including a right lens and a second pixel array. A control circuit may use interpupillary distance information to adjust the position of the left lens assembly and the right lens assembly. Sensing circuitry, such as force sensing circuitry, may be used to ensure that the lens assembly does not exert excessive force on the nose. A force sensor may be included between the lens assembly and the nose, such as in, on, or adjacent to the nose flap, or may be coupled to the lens assembly.

Description

[0001] This patent application claims priority to U.S. Patent Application No. 18 / 336,703 filed on June 16, 2023, U.S. Provisional Patent Application No. 63 / 355,990 filed on June 27, 2022, and U.S. Provisional Patent Application No. 63 / 431,514 filed on December 9, 2022, which are hereby incorporated by reference in their entirety. Background Art

[0002] This document relates generally to electronic devices, and more particularly, to wearable electronic device systems.

[0003] Electronic devices are sometimes configured to be worn by a user. For example, a head-mounted device is provided with a head-mounted structure that allows the device to be worn on the user's head. The head-mounted device may include an optical system with lenses. The lenses allow a display in the device to present visual content to the user.

[0004] Different users have faces of different shapes and sizes. This can present challenges when a headset will be used by multiple users. If care is not taken, the headset may not fit perfectly for some users. Summary of the invention

[0005] The head mounted device may have a display that displays content for a user. A head mounted support structure in the device supports the display on the user's head.

[0006] The head mounted device may have a lens in a lens assembly (also referred to herein as a lens module). A left positioner may be used to position the left lens assembly. A right positioner may be used to position the right lens assembly. The left lens module and the right lens module may have corresponding left and right lenses and corresponding left and right portions of a display.

[0007] To accommodate users with different interpupillary distances, the left and right lens assemblies may be moved toward or away from each other. The user may provide the user's interpupillary distance to the head mounted device, an image sensor or other device may be used to measure the interpupillary distance for provision to the head mounted device, and / or a gaze tracking sensor in the head mounted device may measure the user's interpupillary distance when the head mounted device is worn on the user's head. If desired, other sensing devices may be used to measure the position of the lens assembly relative to the user's nose.

[0008] To avoid excessive pressure on the user's nose, sensing circuitry such as force sensing circuitry may be used to detect the pressure applied to the user's nose by the left and right lens assemblies. The control circuitry may, in response to determining that a force threshold has been reached, prevent the positioner from moving the lens assembly closer to the user's nose, and may reposition the lens assembly further away from the nose if necessary. In this manner, the lens assembly may be adjusted to match the user's interpupillary distance or as close to the user's interpupillary distance as possible without applying too much force to the user's nose. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic diagram of an exemplary electronic device such as a head-mounted display device according to an embodiment.

[0010] Figure 2 is a top view of an exemplary head mounted device according to an embodiment.

[0011] Figure 3 is a front view of an illustrative lens assembly with a force or position sensor according to an embodiment.

[0012] Figure 4A is a front view of an illustrative direct force sensor according to an embodiment.

[0013] Figure 4B is a top view of an illustrative sensor woven into a fabric according to an embodiment.

[0014] Figure 4C is a cross-sectional side view of an illustrative nasal flap with an airbag sensor, according to an embodiment.

[0015] Figure 5 is a front view of an illustrative lens assembly with a proximity sensor according to an embodiment.

[0016] Figure 6 is a front view of an illustrative lens assembly having a movable component that blocks a light emitting component to indicate the position of the lens assembly according to an embodiment.

[0017] Figure 7 is a circuit diagram of an illustrative control circuit for controlling a positioner motor while monitoring feedback from the motor, according to an embodiment.

[0018] Figure 8 is a flowchart of illustrative steps involved in operating a head mounted device according to an embodiment.

[0019] Fig. 9 is a front view of an illustrative lens assembly having strain gauges on a blade between an optical module, an intermediate structure, and a trim piece according to an embodiment.

[0020] Fig.10 is a front view of an illustrative lens assembly and attachment structure having a strain gauge coupled to a flexible member of the attachment structure according to an embodiment.

[0021] FIG. 11A to FIG. 11D is a front view of an illustrative force sensor including a spring and a load cell according to some embodiments. DETAILED DESCRIPTION

[0022] The electronic device may include a display and other components for presenting content to a user. The electronic device may be a wearable electronic device. A wearable electronic device such as a head-mounted device may have a head-mounted support structure that allows the head-mounted device to be worn on the user's head.

[0023] The head mounted device may include a display formed of one or more display panels (displays) for displaying visual content to a user. A lens system may be used to allow the user to focus on the display and view the visual content. The lens system may have a left lens aligned with the user's left eye and a right lens aligned with the user's right eye.

[0024] Not all users have eyes separated by the same interpupillary distance. To ensure that a wide range of users can comfortably view content on the display, the head mounted device may be provided with a lens positioner. The lens positioner may be used to adjust the lens-to-lens distance between the left lens and the right lens to match the interpupillary distance of the user.

[0025] To prevent excessive pressure on the surface of the user's nose, a force sensor may be used to determine how much pressure the lens applies to the user's nose when the lens-to-lens spacing changes. The control circuit in the head-mounted device may adjust the left and right lenses to match the user's interpupillary distance unless the lens applies too much pressure to the user's nose (e.g., the pressure measured by the force sensor exceeds a threshold). In some cases, the left and right lenses may be spaced apart so that the lens-to-lens spacing between the left and right lenses matches the user's interpupillary distance. In other cases, the lens-to-lens spacing between the left and right lenses will be slightly larger than the user's interpupillary distance to ensure that the lenses are not excessively pressed against the user's nose. Sensor circuits such as force sensing circuits may be used to provide real-time feedback to the control circuit about the pressure applied by the lens to the user's nose, thereby ensuring that the positions of the left and right lenses are satisfactorily adjusted.

[0026] Figure 1 A schematic diagram of an exemplary system having an electronic device with sensor circuitry that ensures satisfactory placement of a lens relative to a user's facial features is shown. Figure 1As shown, system 8 may include one or more electronic devices such as electronic device 10. The electronic devices of system 8 may include computers, cellular phones, head-mounted devices, wristwatch devices, and other electronic devices. The configuration in which electronic device 10 is a head-mounted device is sometimes described herein as an example.

[0027] like Figure 1 As shown, an electronic device such as electronic device 10 may have a control circuit 12. The control circuit 12 may include storage devices and processing circuits for controlling the operation of the device 10. The circuit 12 may include storage devices, such as hard disk drive storage devices, non-volatile memory (e.g., electrically programmable read-only memory configured to form a solid-state drive), volatile memory (e.g., static or dynamic random access memory), etc. The processing circuit in the control circuit 12 may be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio chips, graphics processing units, application-specific integrated circuits, and other integrated circuits. Software code may be stored on a storage device in the circuit 12 and run on a processing circuit in the circuit 12 to implement control operations of the device 10 (e.g., data acquisition operations, operations involved in processing three-dimensional facial image data, operations involving the use of control signal conditioning components, etc.). The control circuit 12 may include wired and wireless communication circuits. For example, the control circuit 12 may include radio frequency transceiver circuits, such as cellular telephone transceiver circuits, wireless local area network transceiver circuits, etc. transceiver circuitry, millimeter wave transceiver circuitry, and / or other wireless communication circuitry.

[0028] During operation, the communication circuitry of the devices in system 8 (e.g., the communication circuitry of control circuitry 12 of device 10) can be used to support communication between electronic devices. For example, one electronic device can send video and / or audio data to another electronic device in system 8. The electronic devices in system 8 can use wired and / or wireless communication circuitry to communicate over one or more communication networks (e.g., the Internet, a local area network, etc.). The communication circuitry can be used to allow device 10 to receive data from and / or provide data to external equipment (e.g., a network sharing computer, a portable device such as a handheld device or a laptop computer, an online computing equipment such as a remote server or other remote computing equipment, or other electrical equipment).

[0029] Device 10 may include input-output devices 22. Input-output devices 22 may be used to allow a user to provide user input to device 10. Input-output devices 22 may also be used to gather information about the environment in which device 10 operates. Output components in device 22 may allow device 10 to provide output to a user, and may be used to communicate with external electrical equipment.

[0030] like Figure 1As shown, input-output device 22 may include one or more displays such as display 14. In some configurations, display 14 of device 10 includes left and right display panels (sometimes referred to as left and right portions of display 14 and / or left and right displays) that are aligned with the user's left and right eyes, respectively, and can be viewed through left and right lens assemblies. In other configurations, display 14 includes a single display panel that extends across both eyes.

[0031] Display 14 may be used to display images. Visual content displayed on display 14 may be viewed by a user of device 10. Displays such as display 14 in device 10 may be organic light emitting diode displays or other displays based on arrays of light emitting diodes, liquid crystal displays, liquid crystal on silicon displays, projectors or displays based on projecting light beams directly or indirectly onto a surface through specialized optics (e.g., digital micromirror devices), electrophoretic displays, plasma displays, electrowetting displays, micro-LED displays, or any other suitable display.

[0032] Display 14 may present computer-generated content, such as virtual reality content and mixed reality content, to a user. Virtual reality content may be displayed without real-world content. Mixed reality content, which may sometimes be referred to as augmented reality content, may include computer-generated images superimposed on real-world images. The real-world image may be captured by a camera (e.g., a front-facing camera) and merged with the superimposed computer-generated content, or an optical coupling system may be used to allow computer-generated content to be superimposed on the real-world image. For example, a pair of mixed reality glasses or other augmented reality head-mounted display may include a display device that provides an image to a user through a beam splitter, prism, holographic coupler, or other optical coupler. A configuration in which display 14 is used to display virtual reality content to a user through a lens is described herein as an example.

[0033] The input-output device 22 may include a sensor 16. The sensor 16 may include, for example, a three-dimensional sensor (e.g., a three-dimensional image sensor such as a structured light sensor that emits a light beam and uses a two-dimensional digital image sensor to collect image data for a three-dimensional image from a light spot generated when the light beam illuminates a target; a binocular three-dimensional image sensor that uses two or more cameras in a binocular imaging arrangement to collect a three-dimensional image; a three-dimensional lidar (light detection and ranging) sensor; a three-dimensional radio frequency sensor; or other sensors that collect three-dimensional image data), a camera (e.g., an infrared and / or visible digital image sensor), a gaze tracking sensor (e.g., a gaze tracking system based on an image sensor and, if necessary, based on a light source that emits one or more light beams, wherein after the light beams are reflected by the user's eyes, using an image sensor to track the one or more light beams), touch sensors, buttons, force sensors, sensors such as switch-based contact sensors, gas sensors, pressure sensors, humidity sensors, magnetic sensors, audio sensors (microphones), ambient light sensors, microphones for collecting voice commands and other audio input, sensors configured to collect information about motion, position and / or orientation (e.g., accelerometers, gyroscopes, compasses, and / or inertial measurement units including all of these sensors or a subset of one or both of these sensors), fingerprint sensors and other biometric sensors, optical position sensors (optical encoders), and / or other position sensors such as linear position sensors and / or other sensors. Figure 1 As shown, sensor 16 may include sensing circuitry (sensor circuitry) configured to measure pressure applied between objects in system 8. The sensing circuitry may include one or more sensors, such as one or more force sensors 20. Sensing circuitry such as force sensors 20 may be used, for example, to sense the amount of pressure applied by a lens assembly in device 10 to a user's nose.

[0034] User input and other information may be collected using sensors and other input devices in input-output devices 22. If desired, input-output devices 22 may include other devices 24 such as tactile output devices (e.g., vibrating components), light emitting diodes and other light sources, speakers for producing audio output such as ear speakers, and other electronic components. Device 10 may include circuitry for receiving wireless power, circuitry for wirelessly sending power to other devices, batteries and other energy storage devices (e.g., capacitors), joysticks, buttons, and / or other components.

[0035] The electronic device 10 may have a housing structure (eg, housing walls, strips, etc.), such as Figure 126. In a configuration where the electronic device 10 is a head-mounted device (e.g., a pair of glasses, goggles, a helmet, a hat, a headband, etc.), the support structure 26 may include a head-mounted support structure (e.g., a helmet shell, a headband, temples in a pair of glasses, a goggle shell structure, and / or other head-mounted structures). The head-mounted support structure may be configured to be worn on the user's head during operation of the device 10 and may support the display 14, the sensor 16, other components 24, other input-output devices 22, and the control circuit 12.

[0036] Figure 2 2 is a top view of electronic device 10 in an exemplary configuration in which electronic device 10 is a head mounted device. Figure 2 As shown, the electronic device 10 may include a support structure (see, e.g. Figure 1 The device 10 may be mounted on the user's head using support structures 26 that are used in housing components of the device 10 and in wearing the device 10 on the user's head. These support structures may include, for example, structures forming housing walls and other structures (e.g., external housing walls, lens assembly structures, etc.) and straps for the main unit 26-2, or other auxiliary support structures, such as structure 26-1 that helps to hold the main unit 26-2 on the user's face so that the user's eyes are located within the eye-adaptive zone 60.

[0037] The display 14 may include left and right display panels (e.g., left and right pixel arrays, sometimes referred to as left and right displays or left and right display portions), which are mounted in left and right display modules 70, respectively, corresponding to the user's left eye (and left eye zone 60) and right eye (and right eye zone), respectively. The modules 70, which may sometimes be referred to as lens support structures, lens assemblies, lens housings, or lens and display housings, may be individually positioned relative to the housing wall structure of the main unit 26-2 and relative to the user's eyes using positioning circuits such as respective left and right positioners 58. The positioners 58 may include stepper motors, piezoelectric actuators, motors, linear electromagnetic actuators, and / or other electronic components for adjusting the position of the lens assembly. During operation of the device 10, the positioners 58 may be controlled by the control circuit 12. For example, the positioners 58 may be used to adjust the spacing between the modules 70 (and therefore the lens-to-lens spacing between the left and right lenses of the modules 70) to match the interpupillary distance (IPD) of the user's eyes. This allows the user to view left and right display portions of display 14 in the left and right lens modules. However, in some cases, the lenses may apply excessive pressure to the user's nose if adjusted to the user's IPD. Therefore, a sensor may be incorporated into device 10 to monitor the pressure on the user's nose. Figure 3 An exemplary arrangement including a force sensor to monitor pressure applied to a user's nose is shown in FIG.

[0038] like Figure 3 As shown, when the device 10 is worn on the user's head, the lens assembly 70 (e.g., Figure 2 One of the two lens modules 70 shown may be adjacent to the user's nose 40. For simplicity, Figure 3 Only one of the two lens modules is shown in FIG. 1 , but the other lens assembly 70 may have the same structure.

[0039] In order to ensure that when the user's eyes are located in the eye-friendly area 60 ( Figure 2 ), the control circuit 12 may attempt to align the lens center LC with the center PC of the user's eye when the user can see the display 14. At the same time, the control circuit 12 may use a sensor circuit such as a force sensor 20 to monitor the pressure applied by the lens module 70 to the nose 40 to ensure that the lens module 70 does not press too hard on the nose 40 and cause discomfort.

[0040] In the case of a user with a small nose, there may be sufficient available space to align the lens center LC with the eye center PC. In the case of a user with a larger nose, the control circuit 12 may Figure 3 Positioning module 70 as shown. For example, the distance between lens modules 70 (lens-to-lens spacing) can be greater than the distance desired for perfect alignment of lens center LC with eye center PC. Using such a wider lens-to-lens spacing helps ensure that lens module 70 does not exert an inward force on nose 40 that is greater than what is comfortable for the user, while still allowing the user to satisfactorily view content on display 14 through lens 72. Lens module 70 can be placed at a non-zero distance (gap) from the side surface of nose 40, or can be spaced apart from the side surface of nose 40 by a predetermined gap. The user can select the option that is most comfortable for the user among these options, and / or a default setting can be provided to control circuit 12.

[0041] In operation, the positioner 58 enables the lens module 70 ( Figure 2 ) toward the nose 40, thereby attempting to align the lens center LC of each lens with the eye center PC. Sensors may be incorporated into the device 10 to ensure that the lens module 70 does not apply excessive pressure to the nose 40. In general, any desired sensor circuitry may be used to measure pressure on the nose 40. In one example, each lens module 70 may have one or more force sensors 20.

[0042] The force sensor 20 may be incorporated between the nasal flap 29 and each lens assembly 70. The nasal flap 29 may be a fabric, polymer, or other material composition that allows a user of the device 10 to fit comfortably. For example, the nasal flap 29 may be inserted between each lens assembly 70 and the nose 40. In some embodiments, the nasal flap 29 may extend along both sides and over the top of the nose 40 (e.g., over at least a portion of the bridge of the nose 40). However, this is merely exemplary. The nasal flap 29 may have two separate parts, one between the left lens assembly 70 and the nose 40, and the other between the right lens assembly 70 and the nose 40, or may be omitted from the device 10 if desired.

[0043] In an embodiment in which a nasal flap 29 is included in the device 10, a force sensor 20 may be incorporated between each lens assembly 70 (i.e., the left lens assembly 70 and the right lens assembly 70) and the nasal flap 29. However, this position of the force sensor 20 is merely exemplary. In general, the force sensor 20 may be included in any desired position within the device 10. For example, the force sensor 20 may be formed between the nasal flap 29 and the nose 40 as shown in position 20', may be formed within the nasal flap 29 or integral with the nasal flap 29 as shown in position 20", or may be formed within the lens assembly 70 as shown in position 20'".

[0044] although Figure 3 A single force sensor 20 is shown between the nose 40 and the lens assembly 70, but this is merely illustrative. The device 10 may have one force sensor 20 between the nose 40 and each lens assembly 70, may have multiple force sensors between the nose 40 and each lens assembly 70, may have a single force sensor between the nose 40 and one lens assembly 70, or may have any other desired arrangement of force sensors 20.

[0045] Regardless of where the force sensor 20 is formed within the device 10, the force sensor 20 can monitor the amount of force applied to the nose 40 by the lens module 70 to ensure that excessive pressure is not applied to the nose 40. The force sensor 20 can continuously monitor the applied force, or can flag the control circuit 12 when the applied force exceeds a threshold. The force sensor 20 can be any desired type of sensor that monitors the amount of force / pressure applied to the nose 40. Some examples of force sensors 20 are shown in FIG. FIG. 4A to FIG. 4C Shown in.

[0046] In some examples, force sensor 20 may be a direct force sensor, such as Figure 4A The force sensor 20. Figure 4AThe direct force sensor 20 of FIG. 1 may be a piezoresistor and may include electrodes formed by interdigitated traces 27. Specifically, when pressure is applied to the direct force sensor 20, resistance may be determined due to changes in distance between portions of the interdigitated traces 27, and circuitry such as the control circuit 12 may determine the force applied to the direct force sensor 20. If the direct force sensor 20 is placed Figure 3 , or is otherwise placed between the user's nose and the lens assembly 70, the direct force sensor 20 can be used to determine the force applied by the lens assembly 70 to the nose 40 as the lens assembly 70 moves toward the nose 40. The direct force sensor 20 can be used to continuously measure the pressure against the nose 40, or can be used as a threshold sensor (i.e., the control circuit 12 can determine that the resistance of the direct force sensor 20 exceeds a threshold and therefore the force on the nose 40 is too great).

[0047] In other examples, force sensor 20 may be formed from conductive strands, yarns, or fibers and incorporated into a fabric in device 10. For example, force sensor 20 may be formed from a smart fabric or other fabric that includes conductive strands. The conductive strands may be arranged to form a force sensor. Figure 4B An example of such an arrangement is shown in .

[0048] like Figure 4B As shown, the force sensor 20 can be incorporated into the fabric 31. Specifically, the fabric 31 can include conductive strands 28 and non-conductive strands 33. The conductive strands 28 can be arranged to form a force sensor or a portion of a force sensor (e.g., an electrode of a sensor that indicates when the sensor is in contact with the user's nose). For example, a control circuit such as the control circuit 12 can measure the change in capacitance or resistance between the conductive strands 28. Because the capacitance / resistance will change as the distance between the conductive strands 28 changes, the capacitance / resistance measurement indicates the amount of force on the fabric 31. The conductive strands can be formed of a metal (such as silver or copper), which can optionally be coated onto the polymer or fabric strands.

[0049] Although the conductive strands 28 are Figure 4B In the embodiment shown as straight strands, this is merely exemplary. In some embodiments, the conductive strands 28 may be serpentine or have other desired shapes, which may allow the fabric 31 to have improved flexibility.

[0050] If desired, non-conductive strands 33 may be interspersed between at least some of the conductive strands 28. Figure 4B As shown, every other strand may be a non-conductive strand. However, this is merely exemplary. Any desired number of conductive strands and non-conductive strands may be incorporated into fabric 31 to form force sensor 20.

[0051] Fabric 31 may form some or all of nasal flap 29, or may otherwise cover nasal flap 29. Because when device 10 is worn by a user ( Figure 2 ), the nasal flap 29 is located between the nose 40 and the lens assembly 70, so the force sensor 20 can indicate the amount of force applied to the nose 40 by the lens assembly 70. Any desired number of force sensors 20 can be incorporated into the nasal flap 29 in this manner.

[0052] Alternatively or in addition, fabric 31 may be incorporated into device 10 in other ways. For example, fabric 31 may form a curtain fabric that is incorporated into device 10 between support structure 26-2 and lens 70 ( Figure 2 ) to hide the internal components. At least a portion of the curtain fabric with force sensors 20 can be located between the lens assembly 70 and the nose 40 (e.g., between the lens assembly 70 and the nose flap 29), and can therefore measure the force applied to the nose 40 by the lens assembly 70. However, in general, the fabric 31 can be incorporated into the device 10 in any desired manner. Any desired number of force sensors 20 can be incorporated into the fabric 31.

[0053] In other examples, the force sensor 20 may be incorporated into the interior region of the nasal flap 29. Figure 4C An example of an arrangement in which the force sensor is located inside the nasal flap 29 is shown in .

[0054] like Figure 4C As shown, the nasal flap 29 may have a peripheral region 29A surrounding an inner region 29B (also referred to herein as a chamber). The peripheral region 29A may be formed of a polymer, rubber, or any other desired material. The inner region 29B may be filled with air, a gas, a liquid, or any other desired substance. The force sensor 20 may be located in the inner region 29B and may generate force measurements in response to an increase in pressure in the inner region 29B. For example, when the lens assembly 70 presses the nasal flap 29 against the nose 40 ( Figure 2 ), the pressure of the air, gas, liquid, or other material within nasal flap 29 may increase, thereby increasing the pressure on force sensor 20. In some examples, force sensor 20 may be an atmospheric pressure sensor that measures the increased pressure within interior region 29B as lens assembly 70 moves against nose 40. Thus, force sensor 20 may generate force measurements indicative of the force applied by lens assembly 70 to the user's nose.

[0055] although Figure 4C One side or a portion of the nasal flap 29 is shown, but this is for illustrative purposes only. Any desired number of force sensors 20 may be incorporated into the interior region 29B of the nasal flap 29 located on one or both sides of the user's nose. Figure 4CThe force sensor 20 is shown implemented as a pressure sensor in the nose flap 29, but the force sensor 20 can be a pressure sensor anywhere between the nose 40 and the lens assembly 70 when worn by the user. For example, if desired, the force sensor 20 can be implemented within the edge portion of the lens assembly 70 (i.e., at Figure 3 The position of the pressure sensor is 20”’.

[0056] As FIG. 4A to FIG. 4C As an alternative to the sensor shown in FIG. 1 , the force sensor 20 may be implemented to measure the deflection of the nasal flap 29 relative to the lens assembly 70. An example of this type of force sensor is shown in FIG. Figure 5 Shown in.

[0057] like Figure 5 As shown, the force sensor 20 may be mounted to a portion of (or within) the lens assembly 70. The force sensor 20 may be a sensor that measures the proximity of the nasal flap 29, such as a capacitive proximity sensor, a resistive proximity sensor, an optical proximity sensor, an ultrasonic proximity sensor, or any other desired type of proximity sensor. Alternatively, the magnet 32 ​​may be embedded in (or mounted to) the nasal flap 29, and the force sensor 20 may be implemented as a Hall effect sensor. In this manner, the Hall effect sensor may determine the proximity of the magnet 32 ​​and, therefore, the proximity of the nasal flap 29. By measuring the proximity of the nasal flap 29 (i.e., the amount that the nasal flap 29 has moved), the proximity sensor may provide an output indicative of the amount of force applied to the user's nose by the lens assembly 70.

[0058] Although previous embodiments have included a dedicated force sensor 20 to ensure that excessive force is not applied to the user's nose, this is merely exemplary. Device 10 may use other sensors (such as sensor 16) to determine whether the force applied to nose 40 exceeds a threshold. Figure 6 An example of such an arrangement is shown in .

[0059] like Figure 6 As shown, one or more flexible members 34 may extend from the lens assembly 70. The flexible member 34 may be formed of rubber, polymer, fabric, or any other desired flexible material. The device 10 may also include a light emitting component 36 and a light detecting component 42, which may be used for gaze tracking or other desired operations. For example, the light emitting component 36 may be an infrared light emitting component, and the light detecting component 42 may be an infrared light detecting component. In order to determine the gaze of the user of the device 10, the infrared light emitting component 36 may emit light to the user's eyes, and the reflections from the user's eyes may be detected by the infrared light detecting component 42. These reflections may indicate the direction of the user's gaze. However, in general, the light emitting component 36 and the light detecting component 42 may be any desired components and may operate in any desired wavelength.

[0060] As assembly 70 moves toward nasal flap 29 (and therefore toward nose 40), it will eventually contact and push against nasal flap 29 and nose 40, thereby moving flexible member 34 in direction 38. If flexible member 34 moves far enough (i.e., the amount of force applied to nose 40 exceeds or reaches a threshold), flexible member 34 may block light emitting component 36. As a result, light detecting component 42 may stop detecting light emitted by light emitting component 36. Based on the changing signal of light detecting component 42, control circuit 12 may prevent positioner 58 from moving lens assembly 70 further toward the user's nose.

[0061] Although the flexible member 34 is shown as covering the light emitting component 36, this is merely exemplary. The flexible member 34 may cover the light detecting component 42, or may simply move between the light emitting component 36 and the light detecting component 42. Additionally, any desired number of flexible members 34 may be used.

[0062] In some embodiments, light detection component 42 can be used to determine the position of the user's nose without the intervening flexible member 34. For example, light detection component 42 can be a camera (e.g., a camera sensitive to visible light) that determines how close lens assembly 70 is to nose 40. Control circuitry such as control circuit 12 ( Figure 1 ) may process images or video captured by camera 42 to determine the position of lens assembly 70 relative to nose 40. Control circuitry 12 may prevent positioner 58 from moving lens assembly 70 closer to nose 40 if lens assembly 70 is within a threshold distance of nose 40 or nose 40 has been depressed a threshold amount.

[0063] Alternatively or in addition, a three-dimensional scan may be performed on the user of device 10 to ensure proper fit. The three-dimensional scan may be performed by a three-dimensional sensor in device 10 or external to device 10 (such as a camera, an infrared dot projector, an infrared sensor, etc.). The three-dimensional scan may be used to capture the topography of the user's face. Control circuitry 12 may then use the topography of the user's face to ensure that positioner 58 does not move lens assembly 70 too close to nose 40 or apply too much force to nose 40. For example, control circuitry 12 may use the topography information to calculate the maximum distance that the lens assembly can move without applying too much force to nose 40, and limit the movement to that maximum distance.

[0064] Alternatively or in addition, the device 10 may include a manual button that the user may press to indicate discomfort caused by excessive force on the nose 40. In response to detecting the pressing of the manual button, the positioner 58 may stop moving the lens assembly 70 toward the nose 40. If desired, the positioner 58 may also reverse the lens assembly 70 away from the nose 40 in response to the pressing of the manual button and / or excessive force detection. For example, the positioner 58 may move the lens module 70 away from the nose 40 by a desired gap (e.g., a gap G of at least 0.1 mm, at least 0.2 mm, at least 1 mm, at least 2 mm, less than 5 mm, or other suitable intervals).

[0065] If desired, as lens module 70 is moved into contact with a surface of nose 40 , feedback from the motor in positioner 58 may be used to measure the position of lens module 70 relative to the corresponding surface of nose 40 . Figure 7 An exemplary control circuit for a positioner such as positioner 58 is shown. Control circuit 12 ( Figure 1 ) may include a motor controller such as controller 80. Controller 80 may drive motor 86 in positioner 58 to move associated lens module 70 by providing a power supply voltage Vin to motor 86 using path 84. When voltage Vin is provided to motor 86, controller 80 of control circuit 12 uses sensor circuit 82 (e.g., a current sensing resistor with corresponding analog-to-digital converter circuit, etc.) to monitor the resulting current (current I) through path 84. As motor 86 moves lens assembly 70, power supply voltage Vin may remain relatively constant. Positioner 58 may initially be used to position an edge of lens assembly 70 away from nose 40. Control circuit 12 may then direct positioner 58 to move lens assembly 70 toward nose 40. Controller 80 of control circuit 12 may monitor current I flowing through path 84 and I sensed by sensor 82. When lens assembly 70 is pressed against the side of nose 40, current I will increase. When the current I exceeds a desired threshold value (which is related to the force applied to the nose 40 ), the control circuit 12 may prevent the positioner 58 from applying more force to the nose 40 with the lens assembly 70 .

[0066] Figure 8 Illustrative operations involved in operating device 10 in system 8 are shown.

[0067] During the operation of frame 100, information about the distance between the user's eyes (interpupillary distance IPD, sometimes referred to as pupil distance) may be collected. For one exemplary arrangement, device 10 or other equipment in system 8 collects the user's interpupillary distance by prompting the user to enter the interpupillary distance into a data input box on display 14 or other equipment in system 8. The user may also provide the user's interpupillary distance using voice input or other user input arrangements. For another exemplary arrangement, a sensor in device 10 or other sensors in a stand-alone computer, portable device, or other device in system 8 may measure the user's interpupillary distance. For example, a sensor such as a two-dimensional or three-dimensional image sensor may collect an image of the user's face to measure the value of the interpupillary distance IPD. After the interpupillary distance has been measured, the interpupillary distance may be provided to device 10 (e.g., via a wired or wireless communication path). If desired, a gaze tracker may measure the position of the center PD of the user's eyes, thereby determining the IPD by direct measurement when the user wears device 10 on the user's head.

[0068] After collecting the interpupillary distance IPD, control circuitry 12 of device 10 may use positioner 58 to adjust the lens-to-lens distance between lens centers LC during operation of block 102 so that the distance matches the interpupillary distance IPD and so that the centers of lenses 72 are aligned with respective eye centers PC. While positioner 58 is moving lens module 70 and lenses 72 (e.g., while the lens-to-lens distance is being reduced to move module 70 toward an adjacent surface of a user's nose), control circuitry 12 uses force sensing circuitry (e.g., force sensor 20) to monitor the force applied by lens module 70 on nose 40. In some cases, user nose 40 may prevent lenses 72 from being brought sufficiently close together to allow the lens-to-lens distance to accurately match the IPD without risking discomfort to the user.

[0069] In other words, the force sensor 20 may indicate that the force applied by the lens module 70 to the nose 40 is too great, or that the force applied by the lens module 70 to the nose 40 has reached a threshold. Alternatively or in addition, the device 10 may include a manual button that the user may press to indicate discomfort caused by the excessive force on the nose 40. In response to the excessive force measured by the force sensor 20 or the user's pressing of the button, the control circuit 12 may then prevent the positioner 58 from moving the lens module 70 further toward the nose 40. If desired, the positioner 58 may move the lens module 70 away from the nose 40 by a desired gap (e.g., a gap G of at least 0.1 mm, at least 0.2 mm, at least 1 mm, at least 2 mm, less than 5 mm, or other suitable intervals).

[0070] After positioning module 70 at a desired location relative to nose 40 to ensure that the user feels comfortable when wearing device 10 , control circuitry 12 may use display 14 to present visual content to the user through lens 72 (block 104 ).

[0071] As an alternative or in addition to mounting the force sensor on the nasal flap, the force sensor may be coupled to the lens module. An illustrative example of a force sensor coupled to a lens module is shown in Fig. 9 Shown in.

[0072] like Fig. 9 As shown, the lens module 70 may include an optical module 69 (also referred to herein as an optical portion) surrounded by a decorative ring 90. The decorative ring 90 may be a metal, plastic, or other material decorative ring surrounding the optical module 69. In addition, the lens module 70 may have an intermediate decorative piece 71 located between the optical portion 69 and the decorative ring 90. In order to mount the force sensor to the lens module 70, blades 92A to 92D may be mounted between the intermediate decorative piece 71 and the decorative ring 90, and blades 94A to 94D may be mounted between the optical portion 69 and the intermediate decorative piece 71. Specifically, the flexible structures 92 and 94 (also referred to herein as flexible structures and blade structures) may be formed of metal, plastic, other polymers, or other desired materials. In an illustrative example, the flexible structures 92 and 94 may be formed of flexible metal sheets, such as steel or other metals having a low thickness (such as less than 300 microns, less than 260 microns, less than 250 microns, or other suitable thicknesses).

[0073] The blade 92 may extend in the x-direction between the middle trim piece 71 and the trim ring 90. The blade 94 may extend in the y-direction between the optical portion 69 and the middle trim piece 71. To measure the force applied to the lens module 70, such as when the lens module 70 contacts the user's nose when adjusting based on the IPD, strain gauges 96A and 96B may be coupled to the blades 92 and 94. Fig. 9 In the example of FIG. 1 , strain gauge 96A is coupled to blade 92B, and strain gauge 96B is coupled to blade 94B. However, this arrangement is merely illustrative. In general, strain gauge 96 may be coupled to either of flexible structures 92 and 94. Furthermore, more than two strain gauges 96 may be used if desired. In some embodiments, all flexible structures 92 and 94 may have associated strain gauges 96. Alternatively, only one of flexible structures 92 or 94 may have strain gauges 96 if desired.

[0074] When the lens module 70 contacts the user's nose, the decorative ring 90 and / or the intermediate decorative piece 71 may deflect, thereby causing the deflection of the blades 92 and / or the blades 94. The strain gauges 96 may measure these deflections, which may be proportional to the force applied to the nose. In this way, the strain gauges 96 may monitor the force applied to the nose by the lens module 70. If the force is too great, the control circuitry, such as the control circuit 12, may prevent the lens module from moving toward the user's nose and, if necessary, may move back a set distance away from the user's nose. In this way, the strain gauges on the blades 92 and / or 94 may monitor the force applied to the user's nose to avoid excessive pressure on the nose.

[0075] although Fig. 9 A flexible structure 92 between the intermediate trim 71 and the trim ring 90 and a flexible structure 94 between the optical portion 69 and the intermediate trim 71 are shown, but this is merely exemplary. If desired, the blade 92 may extend between the intermediate trim 71 and the optical portion 69, and the blade 94 may extend between the intermediate trim 71 and the trim ring 90. Regardless of the arrangement of the blades 92 and 94, a strain gauge 96 may be coupled to the blades to detect whether the lens module 70 is applying excessive pressure to the nose.

[0076] although Fig. 9 The blades 92 and 94 are shown extending in the x and y directions, but this is for illustration only. In general, the blades 92 and 94 may extend in any desired direction, including the z direction or an intermediate direction between the x, y and / or z directions. Fig. 9 The blades 92 and 94 are shown between the optical portion 69 , the intermediate trim 71 and the trim ring 90 , but this is merely exemplary. In some embodiments, the intermediate trim 71 may be omitted, and the blades 92 and 94 may extend directly between the optical portion 69 and the trim ring 90 .

[0077] As an alternative or in addition to having a strain gauge within the lens module 70 , the strain gauge may be coupled to the attachment mechanism between the lens module 70 and the head mounted housing 26 . Fig.10 An illustrative example of such an arrangement is shown in .

[0078] like Fig.10 As shown, the device 10 may include an attachment structure 98 (also referred to herein as a coupler 98) that can couple the lens module 70 to a head-mounted housing, such as Figure 2 The coupler 98 can be attached to the housing 26 using an attachment 106. In some embodiments, the attachment 106 can include a pin, a rod, or other mechanism that allows the lens module 70 to slideably move relative to the head-mounted housing 26. However, in general, the attachment 106 can include any desired component that attaches the lens module 70 to the housing 26.

[0079] The coupler 98 may also include a flexible structure 108 (also referred to herein as a blade 108) extending between the optical module 70 and the attachment 106. The flexible structure 108 may be formed of metal, plastic, or other material that bends when a force is applied to the lens module 70 (e.g., because the attachment 106 remains fixed). For example, the blade 108 may be formed of steel or other metal having a small thickness, such as less than 300 microns, less than 260 microns, less than 250 microns, or other suitable thickness.

[0080] A strain gauge 110 may be mounted on at least one of the blades 108. The strain gauge 110 may measure the strain of the blade 108 when a force is applied to the lens module 70, the strain being proportional to the force on the lens module 70. In this manner, the force applied by the lens module 70 on the nose may be monitored, and if excessive force is applied, the pressing of the lens module 70 against the nose may be prevented.

[0081] Although strain gauge 110 is shown on only one of blades 108 , this is merely exemplary. In general, strain gauge 110 may be applied to any or all of blades 108 .

[0082] As an alternative to mounting strain gauges 110 on blades 108 in coupler 98 , coupler 98 may include a spring structure and a load cell or position sensor to determine the amount of force applied by module 70 to the nose. FIG. 11A to FIG. 11D An exemplary arrangement of springs and force sensing components is shown in FIG.

[0083] like Fig.11A As shown, the coupler 98 may include a structure 112 that may be coupled to the top of the module 70 and a tension spring 116 coupled to the structure 112. Specifically, the tension spring 116 may extend from a member 118 to a load cell 114, which may correspond to Fig.10 106 (e.g., between coupler 98 and head mounted housing). Load cell 114 can monitor the force applied by spring 114. Because spring 116 is coupled to component 118 and / or structure 112 (which is coupled to the optical module), load cell 114 can be triggered when a force exceeding a desired threshold (determined by spring 114) is applied to the nose. Specifically, the force is proportional to the force applied by module 70 on the nose. In this way, the output of load cell 114 can be monitored, and if excessive force is detected (e.g., when load cell 114 is triggered), module 70 can be prevented from applying additional pressure to the nose.

[0084] As use Fig.11A Instead of the tension spring in the example, a compression spring 120 ( Fig. 11B ) or a double spring having segments 122 and 124 may be used ( Fig. 11CRegardless of the type of spring used, the output of the load cell 114 can be monitored and if excessive force is detected, the module 70 can be prevented from applying additional pressure to the nose.

[0085] For example, Fig.11D As shown, a spring interferometer can be used. Fig.11D As shown, coupler 98 may include spring 128 coupled to member 118. Interferometer 126 may measure the force applied to the nose by module 70 by monitoring the position of member 118.

[0086] The physical environment refers to the physical world that people can sense and / or interact with without the help of electronic devices. The physical environment may include physical features, such as physical surfaces or physical objects. For example, the physical environment corresponds to a physical park including physical trees, physical buildings, and physical people. People can directly sense and / or interact with the physical environment, such as through vision, touch, hearing, taste, and smell. In contrast, the extended reality (XR) environment refers to a fully or partially simulated environment that people sense and / or interact with via electronic devices. For example, the XR environment may include augmented reality (AR) content, mixed reality (MR) content, virtual reality (VR) content, and the like. In the case of an XR system, a subset of a person's physical movements or a representation thereof is tracked, and in response, one or more characteristics of one or more virtual objects simulated in the XR environment are adjusted in a manner that complies with at least one physical law. As an example, the XR system may detect head movement, and in response, adjust the graphical content and sound field presented to the person in a manner similar to the way such views and sounds change in the physical environment. As another example, the XR system may detect movement of an electronic device (e.g., a mobile phone, tablet, laptop, etc.) presenting the XR environment, and in response, adjust the graphical content and sound fields presented to a person in a manner similar to how such views and sounds would change in a physical environment. In some cases (e.g., for accessibility reasons), the XR system may adjust characteristics of the graphical content in the XR environment in response to representations of physical movement (e.g., voice commands).

[0087] There are many different types of electronic systems that enable people to sense and / or interact with various XR environments. Examples include head-mounted systems, projection-based systems, heads-up displays (HUDs), vehicle windshields with integrated display capabilities, windows with integrated display capabilities, displays formed as lenses designed to be placed on a person's eyes (e.g., similar to contact lenses), headphones / earpieces, speaker arrays, input systems (e.g., wearable or handheld controllers with or without tactile feedback), smartphones, tablet computers, and desktop / laptop computers. A head-mounted system may have one or more speakers and an integrated opaque display. Alternatively, a head-mounted system may be configured to accept an external opaque display (e.g., a smartphone). A head-mounted system may incorporate one or more imaging sensors for capturing images or video of a physical environment and / or one or more microphones for capturing audio of a physical environment. Instead of an opaque display, a head-mounted system may have a transparent or translucent display. A transparent or translucent display may have a medium through which light representing an image is directed to a person's eyes. The display may utilize digital light projection, OLED, LED, uLED, liquid crystal on silicon, laser scanning light source, or any combination of these technologies. The medium may be an optical waveguide, a hologram medium, an optical combiner, an optical reflector, or any combination thereof. In some implementations, a transparent or translucent display may be configured to selectively become opaque. A projection-based system may employ retinal projection technology that projects a graphic image onto a person's retina. The projection system may also be configured to project a virtual object into a physical environment, such as a hologram or onto a physical surface.

[0088] As described above, one aspect of the present technology is to collect and use information, such as sensor information. The present disclosure contemplates that, in some cases, data including personal information data may be collected that uniquely identifies or can be used to contact or locate a specific person. Such personal information data may include demographic data, location-based data, phone numbers, email addresses, Twitter IDs, home addresses, data or records related to the user's health or fitness level (e.g., vital sign measurements, medication information, exercise information), date of birth, user name, password, biometric information, or any other identification or personal information.

[0089] The present disclosure recognizes that the use of such personal information in the present technology can be used to benefit users. For example, the personal information data can be used to deliver targeted content that users are more interested in. Therefore, the use of such personal information data enables users to have control over the content delivered. In addition, the present disclosure also anticipates other uses of personal information data that benefit users. For example, health and fitness data can be used to provide insights into the user's overall health status, or can be used as positive feedback to individuals who use technology to pursue health goals.

[0090] The disclosure anticipates that entities responsible for the collection, analysis, disclosure, transmission, storage or other uses of such personal information data will comply with sound privacy policies and / or privacy measures. Specifically, such entities should implement and adhere to the use of privacy policies and measures that are recognized as meeting or exceeding industry or government requirements for maintaining the privacy and security of personal information data. Such policies should be easy for users to access and should be updated as changes in the collection and / or use of data occur. Personal information from users should be collected for legal and reasonable entity purposes and should not be shared or sold outside these legal purposes. In addition, such collection / sharing should be carried out after receiving the user's informed consent. In addition, such entities should consider taking any necessary steps to protect and safeguard access to such personal information data and ensure that other entities with access to personal information data comply with their privacy policies and procedures. In addition, such entities may subject themselves to third-party assessments to prove that they comply with widely accepted privacy policies and measures. In addition, policies and measures should be adapted to specific types of personal information data collected and / or accessed, and to applicable laws and standards including considerations of special jurisdictions. For example, in the United States, the collection or access of certain health data may be governed by federal and / or state laws such as the Insurance Portability and Accountability Act (HIPAA), while health data in other countries may be subject to other regulations and policies and should be handled accordingly. Therefore, different privacy measures should be advocated for different types of personal data in each country.

[0091] Regardless of the foregoing, the present disclosure also contemplates implementation schemes in which users selectively block the use or access of personal information data. That is, the present disclosure contemplates providing hardware elements and / or software elements to prevent or block access to such personal information data. For example, the technology of the present invention may be configured to allow users to choose to "opt in" or "opt out" to participate in the collection of personal information data at any time during or after registration for a service. In another example, a user may choose not to provide certain types of user data. In yet another example, a user may choose to limit the length of time that user-specific data is maintained. In addition to providing "opt-in" and "opt-out" options, the present disclosure also contemplates providing notifications related to access or use of personal information. For example, a user may be notified that their personal information data will be accessed when downloading an application ("app"), and then the user may be reminded again before the personal information data is accessed by the app.

[0092] In addition, it is the intention of the present disclosure that personal information data should be managed and processed in a manner that minimizes the risk of unintentional or unauthorized access or use. Once the data is no longer needed, the risk can be minimized by limiting data collection and data deletion. In addition, and when applicable, including in certain health-related applications, data de-identification can be used to protect the privacy of users. Where appropriate, de-identification can be facilitated by removing specific identifiers (e.g., date of birth, etc.), controlling the amount or characteristics of stored data (e.g., collecting location data at the city level rather than the address level), controlling how the data is stored (e.g., aggregating data between users), and / or other methods.

[0093] Thus, while the present disclosure broadly encompasses the use of information that may include personal information data to implement one or more of the various disclosed embodiments, the present disclosure also contemplates that various embodiments may be implemented without requiring access to personal information data. That is, various embodiments of the present technology will not fail to function properly due to the lack of all or a portion of such personal information data.

[0094] According to an embodiment, a head-mounted device is provided, comprising: a display having a first display portion and a second display portion; a control circuit configured to supply content using the display; a first lens assembly and a second lens assembly, the first lens assembly comprising the first display portion, and the second lens assembly comprising the second display portion; a positioning circuit configured to adjust a lens-to-lens spacing between the first lens assembly and the second lens assembly; and a sensor circuit configured to collect force sensor information in response to the first lens assembly and the second lens assembly applying force to the nose.

[0095] According to another embodiment, the head-mounted device includes a nasal flap configured to separate the first lens assembly and the second lens assembly from the nose.

[0096] According to another embodiment, the sensor circuit includes a first sensor and a second sensor, wherein the first sensor is interposed between the nasal flap and the first lens assembly, and the second sensor is interposed between the nasal flap and the second lens assembly.

[0097] According to another embodiment, the first sensor and the second sensor are direct force sensors.

[0098] According to another embodiment, the direct force sensor includes a resistor having interdigitated traces.

[0099] According to another embodiment, the first sensor and the second sensor are proximity sensors configured to measure the proximity of the nasal flap to the first lens assembly and the second lens assembly.

[0100] According to another embodiment, the head-mounted device includes a magnet located in the nasal flap, and the first sensor and the second sensor are Hall effect sensors configured to measure the proximity of the magnet.

[0101] According to another embodiment, the sensor circuit includes a camera configured to capture an image, and the control circuit is configured to determine the position of the first lens assembly and the second lens assembly relative to the nose based on the image.

[0102] According to another embodiment, the positioning circuit is configured to stop moving the first lens assembly and the second lens assembly toward the nose in response to the control circuit determining that the distance between the first lens assembly and the second lens assembly and the nose is less than a threshold.

[0103] According to another embodiment, the control circuit is configured to determine a maximum distance that the first lens assembly and the second lens assembly can move toward the nose based on a three-dimensional facial scan, and the positioning circuit is configured to stop moving the first lens assembly and the second lens assembly toward the nose after moving the maximum distance.

[0104] According to another embodiment, the nasal flap includes a material surrounding a cavity, and the sensor circuit includes a pressure sensor within the cavity.

[0105] According to another embodiment, the pressure sensor is an atmospheric pressure sensor.

[0106] According to another embodiment, the sensor circuit includes a light emitting component and a light detecting component, and the system also includes a flexible member extending from the first lens assembly and the second lens assembly, and the flexible member is configured to move between the light emitting component and the light detecting component when the force exceeds a threshold.

[0107] According to another embodiment, the positioning circuit includes a motor and the sensor circuit includes a sensor that measures a voltage and a current of the motor to determine the force.

[0108] According to another embodiment, the positioning circuit is configured to move the first lens assembly and the second lens assembly toward the nose, and is configured to stop moving the first lens assembly and the second lens assembly toward the nose in response to the force exceeding a threshold.

[0109] According to another embodiment, the positioning circuit is further configured to move the first lens assembly and the second lens assembly away from the nose by a gap in response to the force exceeding the threshold.

[0110] According to another embodiment, the sensor circuit is coupled to the first lens assembly and the second lens assembly and is configured to collect nasal contact force information.

[0111] According to another embodiment, the head-mounted device includes a flexible structure, which is coupled to the first lens assembly, and the sensor circuit includes a strain gauge coupled to the flexible structure.

[0112] According to another embodiment, the lens-to-lens spacing is configured to be adjusted along a first direction, and the flexible structure extends along a second direction perpendicular to the first direction.

[0113] According to another embodiment, the flexible structure is a first flexible structure and the strain gauge is a first strain gauge, the head-mounted device also includes a second flexible structure, the second flexible structure extends along the first direction, and the sensor circuit also includes a second strain gauge coupled to the second flexible structure.

[0114] According to another embodiment, the first lens assembly and the second lens assembly include a first decorative piece and a second decorative piece, respectively, and the first flexible structure and the second flexible structure extend from an optical portion of the first lens assembly to the first decorative piece.

[0115] According to another embodiment, the head-mounted device includes a third flexible structure, which extends along a third direction different from the first direction and the second direction, and the sensor circuit also includes a third strain gauge coupled to the third flexible structure.

[0116] According to another embodiment, the head-mounted device includes a head-mounted shell and a first coupler and a second coupler, wherein the first coupler and the second coupler respectively attach the first lens assembly and the second lens assembly to the head-mounted shell, and the sensor circuit is coupled to the first coupler and the second coupler.

[0117] According to another embodiment, the head-mounted device includes a flexible structure, which is coupled to the first coupler and the second coupler, and the sensor circuit includes a strain gauge coupled to the flexible structure.

[0118] According to another embodiment, the lens-to-lens spacing is configured to be adjusted along a first direction, and the flexible structure extends along a second direction perpendicular to the first direction.

[0119] According to another embodiment, the head-mounted device includes: a spring, which is coupled to the first coupler and the second coupler; and a load cell, which is coupled to the spring, and the load cell is configured to measure the force.

[0120] According to another embodiment, the spring is a tension spring.

[0121] According to another embodiment, the spring is a compression spring.

[0122] According to another embodiment, the spring comprises a double spring coupled to each of the first coupler and the second coupler.

[0123] According to another embodiment, the head-mounted device includes: a spring, which is coupled to the first coupler and the second coupler; and a sensor, which is coupled to the first coupler and the second coupler, and the sensor is configured to determine the distance between the sensor and the spring to determine the force.

[0124] According to an embodiment, a head-mounted device is provided, which includes: a first pixel array and a second pixel array, wherein the first pixel array and the second pixel array are configured to display content; a left positioner and a right positioner; a left lens assembly and a right lens assembly, wherein the left lens assembly and the right lens assembly are positioned by the left positioner and the right positioner, respectively, the left lens assembly includes a left lens and the first pixel array, and the right lens assembly includes a right lens and the second pixel array; a nasal flap, wherein the nasal flap is configured to separate a nose from the left lens assembly and the right lens assembly; a left force sensor, wherein the left force sensor is adjacent to the left lens assembly; a right force sensor, wherein the right force sensor is adjacent to the right lens assembly; and a control circuit, wherein the control circuit is configured to use the left positioner and the right positioner to position the left lens assembly and the right lens assembly based on information from the left force sensor and the right force sensor.

[0125] According to another embodiment, the left force sensor and the right force sensor are interposed between the nasal flap and the left lens assembly and between the nasal flap and the right lens assembly, respectively.

[0126] According to another embodiment, the left force sensor and the right force sensor are integrated into the nasal flap.

[0127] According to another embodiment, the left force sensor and the right force sensor are interposed between the nasal flap and the nose.

[0128] According to an embodiment, a head-mounted device is provided, which includes: a display; a lens assembly, the lens assembly including a portion of the display, the lens assembly including an optical portion and a decorative ring extending around the optical portion; a plurality of blades, the plurality of blades coupled to the optical portion and the decorative ring; a positioning circuit, the positioning circuit configured to move the lens assembly; and a strain gauge, the strain gauge being located on the plurality of blades, the strain gauge being configured to collect force sensor measurement results.

[0129] According to another embodiment, the lens assembly further comprises an intermediate decorative piece, wherein the intermediate decorative piece is located between the optical part and the decorative ring, a first blade among the plurality of blades is coupled to the optical part and the intermediate decorative piece, and a second blade among the plurality of blades is coupled to the intermediate decorative piece and the decorative ring.

[0130] According to another embodiment, a first blade among the plurality of blades extends along a first direction, a second blade among the plurality of blades extends along a second direction perpendicular to the first direction, at least one of the strain gauges is located on a first blade among the first blades, and at least another one of the strain gauges is located on a second blade among the second blades.

[0131] According to another embodiment, each blade of the plurality of blades is coupled to an associated one of the strain gauges.

[0132] The foregoing is merely illustrative and various modifications may be made to the embodiments described. The foregoing embodiments may be implemented individually or in any combination.

Claims

1. A head mounted device, comprising: a display having a first display portion and a second display portion; control circuitry configured to supply content using the display; a first lens assembly and a second lens assembly, wherein the first lens assembly includes the first display portion and the second lens assembly includes the second display portion; a positioning circuit configured to adjust a lens-to-lens spacing between the first lens assembly and the second lens assembly; and A sensor circuit is configured to collect force sensor information in response to the first lens assembly and the second lens assembly applying a force to the nose.

2. The head mounted device according to claim 1, further comprising: A nasal flap is configured to separate the first lens assembly and the second lens assembly from the nose.

3. A head-mounted device according to claim 2, wherein the sensor circuit includes a first sensor and a second sensor, the first sensor is inserted between the nasal flap and the first lens assembly, and the second sensor is inserted between the nasal flap and the second lens assembly.

4. The head mounted device of claim 3, wherein the first sensor and the second sensor are direct force sensors.

5. The head mounted device of claim 4, wherein the direct force sensor comprises a resistor having interdigitated traces.

6. The head-mounted device of claim 3, wherein the first sensor and the second sensor are proximity sensors configured to measure proximity of the nasal flap to the first lens assembly and the second lens assembly.

7. The head mounted device according to claim 3, further comprising: A magnet is located in the nasal flap, wherein the first sensor and the second sensor are Hall effect sensors configured to measure the proximity of the magnet.

8. A head-mounted device according to claim 2, wherein the sensor circuit includes a camera configured to capture an image, and the control circuit is configured to determine the position of the first lens assembly and the second lens assembly relative to the nose based on the image.

9. A head-mounted device according to claim 8, wherein the positioning circuit is configured to stop moving the first lens assembly and the second lens assembly toward the nose in response to the control circuit determining that the distance between the first lens assembly and the second lens assembly and the nose is less than a threshold value.

10. A head-mounted device according to claim 2, wherein the control circuit is configured to determine a maximum distance that the first lens assembly and the second lens assembly can move toward the nose based on a three-dimensional facial scan, and the positioning circuit is configured to stop moving the first lens assembly and the second lens assembly toward the nose after moving the maximum distance.

11. The head mounted device of claim 2, wherein the nasal flap comprises material surrounding a cavity, and the sensor circuit comprises a pressure sensor located within the cavity.

12. The head mounted device of claim 11, wherein the pressure sensor is an atmospheric pressure sensor.

13. The head mounted device of claim 1 , wherein the sensor circuit comprises a light emitting component and a light detecting component, and the system further comprises: A flexible member extends from the first lens assembly and the second lens assembly, wherein the flexible member is configured to move between the light emitting component and the light detecting component when the force exceeds a threshold.

14. The head mounted device of claim 1, wherein the positioning circuit comprises a motor and the sensor circuit comprises a sensor that measures a voltage and a current of the motor to determine the force.

15. A head-mounted device according to claim 1, wherein the positioning circuit is configured to move the first lens assembly and the second lens assembly toward the nose, and is configured to stop moving the first lens assembly and the second lens assembly toward the nose in response to the force exceeding a threshold.

16. The head mounted device of claim 15, wherein the positioning circuit is further configured to move the first lens assembly and the second lens assembly away from the nose by a certain gap in response to the force exceeding the threshold.

17. The head mounted device of claim 1, wherein the sensor circuit is coupled to the first lens assembly and the second lens assembly and is configured to collect nose contact force information.

18. The head mounted device according to claim 17, further comprising: A flexible structure is coupled to the first lens assembly, wherein the sensor circuit includes a strain gauge coupled to the flexible structure.

19. The head mounted device of claim 18, wherein the lens-to-lens spacing is configured to be adjusted along a first direction, and the flexible structure extends along a second direction perpendicular to the first direction.

20. The head mounted device of claim 19, wherein the flexible structure is a first flexible structure and the strain gauge is a first strain gauge, the head mounted device further comprising: A second flexible structure extends along the first direction, wherein the sensor circuit further includes a second strain gauge coupled to the second flexible structure.

21. A head-mounted device according to claim 20, wherein the first lens assembly and the second lens assembly respectively include a first decorative piece and a second decorative piece, and wherein the first flexible structure and the second flexible structure extend from an optical portion of the first lens assembly to the first decorative piece.

22. The head mounted device of claim 20, further comprising: A third flexible structure extends in a third direction different from the first direction and the second direction, wherein the sensor circuit further includes a third strain gauge coupled to the third flexible structure.

23. The head mounted device of claim 17, further comprising: Head mounted housing; and A first coupler and a second coupler, the first coupler and the second coupler respectively attaching the first lens assembly and the second lens assembly to the head mounted housing, wherein the sensor circuit is coupled to the first coupler and the second coupler.

24. The head mounted device of claim 23, further comprising: A flexible structure is coupled to the first coupler and the second coupler, wherein the sensor circuit includes a strain gauge coupled to the flexible structure.

25. The head mounted device of claim 24, wherein the lens-to-lens spacing is configured to be adjusted along a first direction, and the flexible structure extends along a second direction perpendicular to the first direction.

26. The head mounted device of claim 23, further comprising: a spring coupled to the first coupler and the second coupler; and A load cell is coupled to the spring, wherein the load cell is configured to measure the force.

27. A head mounted device according to claim 26, wherein the spring is a tension spring.

28. A head mounted device according to claim 26, wherein the spring is a compression spring.

29. The head mounted device of claim 26, wherein the spring comprises a double spring coupled to each of the first coupler and the second coupler.

30. The head mounted device of claim 23, further comprising: a spring coupled to the first coupler and the second coupler; and A sensor is coupled to the first coupler and the second coupler, wherein the sensor is configured to determine a distance between the sensor and the spring to determine the force.

31. A head mounted device, the head mounted device comprising: a first pixel array and a second pixel array, wherein the first pixel array and the second pixel array are configured to display content; left locator and right locator; a left lens assembly and a right lens assembly, the left lens assembly and the right lens assembly being positioned by the left positioner and the right positioner, respectively, wherein the left lens assembly includes a left lens and the first pixel array, and wherein the right lens assembly includes a right lens and the second pixel array; a nasal flap configured to separate a nose from the left and right lens assemblies; a left force sensor, the left force sensor being adjacent to the left lens assembly; a right force sensor, the right force sensor being adjacent to the right lens assembly; and A control circuit is configured to position the left and right lens assemblies based on information from the left and right force sensors using the left and right positioners.

32. A head-mounted device according to claim 31, wherein the left force sensor and the right force sensor are respectively inserted between the nasal flap and the left lens assembly and between the nasal flap and the right lens assembly.

33. A head-mounted device according to claim 31, wherein the left force sensor and the right force sensor are integrated into the nasal flap.

34. A head-mounted device according to claim 31, wherein the left force sensor and the right force sensor are interposed between the nasal flap and the nose.

35. A head mounted device, the head mounted device comprising: monitor; a lens assembly comprising a portion of the display, wherein the lens assembly includes an optical portion and a decorative ring extending around the optical portion; a plurality of vanes coupled to the optical portion and to the trim ring; a positioning circuit configured to move the lens assembly; and A strain gauge is located on the plurality of blades, wherein the strain gauge is configured to collect force sensor measurements.

36. The head mounted device of claim 35, wherein the lens assembly further comprises: An intermediate trim piece is located between the optical portion and the trim ring, wherein a first blade of the plurality of blades is coupled to the optical portion and the intermediate trim piece, and a second blade of the plurality of blades is coupled to the intermediate trim piece and the trim ring.

37. A head-mounted device according to claim 36, wherein a first blade among the plurality of blades extends along a first direction, a second blade among the plurality of blades extends along a second direction perpendicular to the first direction, at least one of the strain gauges is located on a first blade among the first blades, and at least another strain gauge among the strain gauges is located on a second blade among the second blades.

38. A head mounted device according to claim 35, wherein each of the plurality of blades is coupled to an associated one of the strain gauges.

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