Device with near field communication

Abstract

A head-mounted device can have a head-mounted housing. The head-mounted housing can have a display that displays images for a user through a lens. The display and lens can be mounted in left and right optical modules. Attachment structures, such as magnets, can be used to removably attach left and right vision correction lenses to the left and right optical modules, respectively. When the user wears the head-mounted device, the images can be viewed from an eyebox through the vision correction lenses. The vision correction lenses and head-mounted device can be provided with near field communication antennas. The antennas can be formed from coils that surround corrective lens elements in the vision correction lenses. In the head-mounted device, the antennas can be formed from coils that surround lenses in the optical modules and / or can include other coils.

Description

[0001] This patent application claims priority to U.S. Provisional Patent Application No. 63 / 075,660, filed September 8, 2020, which is hereby incorporated by reference in its entirety. TECHNICAL FIELD

[0002] The present disclosure relates generally to electronic devices, and more particularly to electronic devices such as head-mounted devices. BACKGROUND

[0003] Electronic devices such as head-mounted devices can have displays for displaying images. A user can view the displayed images while wearing the head-mounted device. SUMMARY

[0004] A head-mounted device is disclosed that can have a head-mounted housing. The head-mounted housing can support left and right optical modules that are respectively aligned with a user’s left and right eyes. The optical modules can include displays for displaying images and lenses through which the images can be viewed.

[0005] Attachment structures such as magnets can be used to removably attach left and right vision correction lenses to the left and right optical modules, respectively. During operation, the displayed images can be viewed through the vision correction lenses from the eyebox.

[0006] The vision correction lenses and the head-mounted device can be provided with near field communication antennas. The antennas can be formed from coils that surround corrective lens elements in the vision correction lenses. In the head-mounted device, the antennas can be formed from coils that surround lenses in the optical modules and / or can include other coils.

[0007] Information such as vision correction information and other information can be stored in the vision correction lenses and transmitted from the vision correction lenses to the head-mounted device using near field communication. In response to the near field communication information received from the vision correction lenses, the head-mounted device can adjust content displayed on the displays or can take other actions. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 is a schematic diagram of an illustrative system having electronic devices in accordance with an embodiment.

[0009] Figure 2 is a side view of an illustrative electronic device such as a head-mounted device in accordance with an embodiment.

[0010] Figure 3 is a top view of an illustrative head-mounted device in accordance with an embodiment.

[0011] Figure 4is a back view of an illustrative removable vision correction lens having near field communication capabilities according to an embodiment.

[0012] Figure 5 is a circuit diagram of an illustrative near field communication circuit according to an embodiment.

[0013] Figure 6 is a flow diagram of illustrative operations involved in using a head mounted device according to an embodiment. DETAILED DESCRIPTION

[0014] A head mounted device can include a head mounted support structure that allows the device to be worn on a user's head. The head mounted device can have a display supported by the head mounted support structure so that the display can show images to a user when the head mounted device is being worn. To communicate with other devices, the head mounted device can be provided with an antenna. The wireless communication circuit can include multiple antennas. The antennas can include near field communication antennas that operate over a relatively short distance. For example, the head mounted device can have one or more near field communication antennas that range less than 20 cm, less than 10 cm, less than 5 cm, 0-25 cm, 0-15 cm, or other suitable range. By using near field communication, information can be securely transferred between external devices and the head mounted device.

[0015] An illustrative system that can include a head mounted device having near field communication circuitry is shown in Figure 1 FIG. 8. As shown in Figure 1 FIG. 8, system 8 can have one or more electronic devices 10. Devices 10 can include a head mounted device, an accessory such as headphones, a component that is removably attached to a head mounted device, or other electronic device, associated computing equipment (e.g., a cellular telephone, a tablet computer, a laptop computer, a desktop computer, and / or a remote computing equipment that supplies content to a head mounted device), and / or other devices (e.g., devices that communicate with a head mounted device).

[0016] Each electronic device 10 can have a control circuit 12. The control circuit 12 can include storage and processing circuitry for controlling the operation of the device 10. The circuit 12 can include storage such as a hard drive storage, 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 circuitry in the control circuit 12 can 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 can be stored on storage in the circuit 12 and run on processing circuitry in the circuit 12 to implement control operations for the device 10 (e.g., data acquisition operations, operations involving adjustment of components of the device 10 using control signals, etc.). The control circuit 12 can include wired and wireless communication circuitry. For example, the control circuit 12 can include radio frequency transceiver circuitry such as cellular telephone transceiver circuitry, wireless local area network transceiver circuitry (e.g., circuitry), millimeter wave transceiver circuitry, near field communication circuitry, and / or other wireless communication circuitry.

[0017] To support interaction with external equipment, the control circuit 12 can be used to implement communication protocols. Communication protocols that can be implemented using the control circuit 12 include Internet protocols, wireless local area network protocols (e.g., IEEE 802.11 protocols - sometimes referred to as Wi-Fi® protocols - such as the IEEE 802.11 ad protocol), protocols for other short range wireless communication links such as the Bluetooth® protocol or other wireless personal area network (WPAN) protocols, IEEE 802.15.4 ultra wideband communication protocols or other ultra wideband communication protocols, near field communication protocols, etc.

[0018] During operation, the communication circuitry of devices in the system 8 (e.g., the communication circuitry of the control circuit 12 of the device 10) can be used to support communication between electronic devices. For example, one electronic device can transmit video data, audio data, and / or other data to another electronic device in the system 8. The electronic devices in the 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 the device 10 to receive data from and / or provide data to external equipment (e.g., a tethered computer, a portable device such as a handheld device or a laptop computer, online computing equipment such as a remote server or other remote computing equipment, or other electrical equipment). ​​

[0019] Device 10 may include an input-output device 22. Input-output device 22 may be used to allow users to provide user input to device 10. Input-output device 22 may also be used to acquire 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.

[0020] like Figure 1 As shown, input-output device 22 may include one or more displays such as display 14. In some configurations, device 10 (e.g., a head-mounted device) includes a left display device and a right display device. Device 10 may include, for example, left and right components such as a left scanning mirror display device and a right scanning mirror display device or other image projector, a silicon-based liquid crystal display device, a digital mirror device or other reflective display device; a left and right display panel based on a light-emitting diode pixel array (e.g., an organic light-emitting display panel or display device based on a pixel array formed from crystalline semiconductor light-emitting diode dies); a liquid crystal display panel; and / or other left and right display devices that provide images to the left and right eye-adaptive zones for viewing by the user's left and right eyes, respectively.

[0021] During operation, display 14 can be used to display visual content to the user of device 10. The content presented on display 14 may include virtual objects and other content provided to display 14 by control circuitry 12. This virtual content may sometimes be referred to as computer-generated content. Computer-generated content may be displayed in the absence of real-world content, or it may be combined with real-world content. In some configurations, real-world images may be captured by a camera (e.g., a forward-facing camera, sometimes referred to as a front-facing camera) such that computer-generated content can be electronically overlaid on portions of the real-world image (e.g., when device 10 is a virtual reality headset).

[0022] The input-output devices 22 can include the sensors 16. The sensors 16 can include, for example, three-dimensional sensors (e.g., structured light sensors that emit a beam of light and use a two-dimensional digital image sensor to capture image data for a three-dimensional image from light dots generated when a target is illuminated by the beam, binocular three-dimensional image sensors that capture three-dimensional images with two or more cameras in a binocular imaging arrangement, three-dimensional light detection and ranging sensors (sometimes referred to as lidar sensors), three-dimensional radio frequency sensors, or other sensors that capture three-dimensional image data), cameras (e.g., infrared and / or visible light digital image sensors), line-of-sight tracking sensors (e.g., line-of-sight tracking systems based on image sensors and, if desired, also based on light sources that emit one or more beams of light that are tracked with image sensors after reflecting from a user's eyes), touch sensors, capacitive proximity sensors, light-based (optical) proximity sensors, other proximity sensors, force sensors (e.g., strain gauges, capacitive force sensors, resistive force sensors, etc.), sensors such as switch-based contact sensors, gas sensors, pressure sensors, humidity sensors, magnetic sensors, audio sensors (microphones), ambient light sensors, microphones for capturing voice commands and other audio input, sensors configured to capture information about motion, position, and / or orientation (e.g., accelerometers, gyroscopes, compasses, and / or inertial measurement units that include all of these sensors or a subset of one or two of these sensors), and / or other sensors.

[0023] User input and other information can be captured with the sensors and other input devices in the input-output devices 22. If desired, the input-output devices 22 can include other devices 24, such as haptic output devices (e.g., a vibrating component), light-emitting diodes and other light sources, speakers such as ear speakers for producing audio output, circuitry for receiving wireless power, circuitry for wirelessly transmitting power to other devices, batteries and other energy storage devices (e.g., capacitors), joysticks, buttons, and / or other components.

[0024] The electronic device 10 (e.g., a head-mounted device) can have a head-mounted support structure such as a head-mounted support structure 26 (e.g., a head-mounted housing structure such as a housing wall, headband, etc.). The head-mounted support structure can be configured to be worn on a user's head (e.g., against a user's face, so as to cover a user's eyes) during operation of the device 10, and can support the display 14, the sensors 16, other components 24, other input-output devices 22, and the control circuitry 12.

[0025] Figure 2is a side view of an illustrative head-mounted electronic device. A head-mounted support structure 26 of the device 10 (which can sometimes be referred to as a housing or case) can have walls or other structures that separate an interior region of the device 10, such as an interior region 42, from an exterior region surrounding the device 10, such as an exterior region 44. Electrical components 30 (e.g., integrated circuits, sensors, control circuitry, input-output devices, etc.) can be mounted on printed circuits and / or other structures within the device 10 (e.g., in the interior region 42).

[0026] To present images for viewing from eyeboxes, such as the eyeboxes 34, the device 10 can include displays, such as the display 14, and lenses, such as the lenses 38. These components can be mounted in optical modules, such as the optical modules 36 (e.g., barrels), to form respective left and right optical systems. For example, there can be a left display in a left optical module to present images to a user’s left eye through a left lens in a left eyebox and a right display in a right optical module to present images to a user’s right eye in a right eyebox. When a rear face R of the structure 26 rests against an outer surface of a user’s face, the user’s eyes are in the eyeboxes 34. To accommodate different interpupillary distances, the lateral separation between the left and right optical modules in the device 10 can be adjusted manually and / or automatically (e.g., using electrically adjustable actuators).

[0027] The support structure 26 can include a main housing support structure, such as the portion 26M. An optically forward-facing publicly viewable display, such as the display 14, can be mounted on a front side F of the portion 26M.

[0028] Different users can have different vision correction needs. A user with perfect vision can use a device 10 without vision correction components. A user with vision correction needs can be provided with removable vision correction lenses, such as the lenses 36C. A user can be provided with a left vision correction lens to correct a vision deficiency in the user’s left eye and a right vision correction lens to correct a deficiency in the user’s right eye. Each vision correction lens can have a corresponding vision correction lens element, such as the vision correction lens element 50 mounted in a vision correction lens housing, such as the housing 60. An adjustable lens 36C can use the lens element 50 to correct a vision deficiency, such as myopia, hyperopia, presbyopia, astigmatism, higher order aberrations, and / or other vision deficiencies.

[0029] Device 10 (e.g., each optical module 36 in device 10) may have a structure that facilitates the removable attachment of a vision correction lens to the rear side of the corresponding optical module 36. For example, each optical module 36 may have an attachment structure 54 for use with a corresponding attachment structure 52 in the housing 60 of the corresponding vision correction lens 36C. Structure 54 may be a magnet, a magnetic component attracted to a magnet (e.g., an iron bar), a snap, clip, or other mechanical interlocking feature, may have threads, and / or may be other structures for receiving the vision correction lens 36C and removably attaching it to device 10 in a manner aligned with the corresponding optical module 36. When the vision correction lens 36C is attached to the optical module 36, a user with visual impairment will be able to clearly view the content displayed on the left and right displays of device 10 through the vision correction lens and the optical module lens 38.

[0030] Each vision correction lens 36C may be equipped with control circuitry and / or other components (e.g., Figure 1 (Some or all of the circuitry in the electronic device). To support communication with the head-mounted device 10, each vision correction lens 36C may have a near-field communication circuit. The device 10 may have a corresponding near-field communication circuit.

[0031] Using the near-field communication antennas in device 10 and lens 36C, information can be exchanged between device 10 and lens 36C. As an example, a user's eyeglass prescription and / or other user information, already implemented using lens element 50, can be stored in each lens 36C. When a user attaches each lens 36C to device 10, device 10 can communicate with that lens via near-field communication (e.g., to obtain user information, such as the user's eyeglass prescription or other information). Device 10 can then adjust its operation based on the obtained information.

[0032] For example, if a user's vision is limited to a narrow field of view, information about this visual impairment can be stored in lens 36C. When lens 36C is attached to device 10, device 10 can be informed that the user has limited vision and can reduce the lateral size of the image displayed on display 14 to accommodate this visual impairment. The user information in lens 36C can also be used as a key to unlock device 10, and can be used to identify the user (e.g., enabling device 10 to present user-specific menu options on display 14 and / or to display images containing information associated with the user's online account), etc.

[0033] To support near field communication, the lenses 36C and the device 10 can be provided with near field communication antennas. For example, the antennas can be antennas formed from coiled wires and / or other coils (e.g., coils formed from metal traces on printed circuits, polymer substrates such as molded polymer members, and / or other coils). Each coil can have a single turn or can have two turns or more turns. The use of multiple turns in each antenna coil can help to enhance antenna sensitivity. The use of a single turn (or fewer turns in a multi-coil arrangement) can help to reduce volume.

[0034] As shown in Figure 2 each lens 36C can have a coil of vision correction lens elements 50 around the lens to form a corresponding near field communication antenna (antenna 56). For example, when viewed along the Y direction of Figure 2 the lens elements 50 can have a circular shape or other suitable shape, and the coil forming the antenna 56 can extend around the peripheral edge of the lens elements (e.g., to form a circular ring or other suitably shaped ring). One or more corresponding near field communication antennas can be provided in the device 10 to communicate with the antenna 56. As shown in the example of Figure 2 each optical module (such as the optical module 36 of Figure 2 can be provided with a corresponding coil to form an associated near field communication antenna (such as antenna 58). The coil forming the antenna 58 can extend in a loop around the peripheral edge of the lens 38. By extending around the lens 38 in this way, the antenna 58 can overlap and align with the antenna 56 (e.g., the antennas 56 and 58 can lie in planes that are parallel to each other and can be concentric). In this way, the left optical module of the device 10 can use its near field communication antenna to communicate with the left vision correction lens attached to the left optical module, and the right optical module of the device 10 can use its near field communication antenna to communicate with the right vision correction lens attached to the right optical module.

[0035] If desired, the device 10 can use a single near field communication antenna to communicate with both of the near field communication antennas 56 of the left and right vision correction lenses. In Figure 3 such a type of arrangement is shown. In Figure 3 a top view of the device 10, the head-mounted electronic device near field communication antenna 58NB is located near the center of the head-mounted support structure 26 (e.g., in the nose bridge portion NB, which is configured to rest on the nose of a user). The antenna 58NB can be configured to communicate via near field communication with the vision correction lens near field communication antenna 56L in the left vision correction lens 36CL and with the vision correction lens near field communication antenna 56R in the right vision correction lens 36CR. Due to the location of the antenna 58NB within the nose bridge portion NB (as opposed to forming a set of concentrically overlapping antenna coils), the amount of electromagnetic near field coupling between the antenna 58NB and the antennas 56R and 56L can be less thanFigure 2 The amount of electromagnetic near-field coupling between the left and right head-mounted device antennas and their corresponding left and right vision correction lens antennas. However, it is possible to use... Figure 3 The arrangement shown in the figure reduces the total number of near-field antennas used in device 10, which helps to reduce the size of device 10.

[0036] Figure 4 This is a diagram illustrating a vision-correcting lens. For example... Figure 4 As shown in lens 36C, the vision correction antenna 56 can be supported by an annular housing member, such as housing member 60, which surrounds and supports the vision correction lens element 50 for the vision correction lens 36. Each lens 36C may include circuitry 70 (e.g., one or more integrated circuits, etc.) coupled to the vision correction lens near-field antenna 56 of that lens. Figure 5 As shown, circuit 70 may include power harvesting circuitry, such as power receiving circuitry 72 (e.g., wireless power receiving circuitry, such as a rectifier, capacitor, battery, or other energy storage device, voltage regulator circuitry, etc.). Circuit 72 may be used to harvest energy from near-field signals transmitted by the near-field communication circuitry of device 10 and received by antenna 56 (e.g., circuit 72 may receive wireless signals from device 10 that serve as wireless power signals). If desired, circuit 70 may include a battery that can be recharged via a wired connection, a replaceable battery (e.g., a non-rechargeable battery), and / or other power sources.

[0037] Using power from circuit 72, control and communication circuitry 74 can communicate with device 10. This may include, for example, circuits such as... Figure 1 The control circuit 74 of the control circuit 12 and the communication circuit may have a near-field communication receiver for receiving near-field communication data already transmitted by the corresponding near-field communication transmitter in the device 10, and may have a near-field communication transmitter for transmitting near-field communication data to the near-field communication receiver in the device 10. In this way, the lens 36C can transmit data to the device 10 (e.g., when powered on, when the lens 36C is attached to the device 10, and / or at other suitable times) and / or the device 10 can transmit data to the lens 36C. Near-field communication between the detachable vision correction lens and the device 10 can be performed at near-field communication frequencies of 13.56 MHz, less than 100 MHz, less than 50 MHz, less than 25 MHz, less than 5 MHz, at least 10 kHz, at least 100 kHz, and / or other suitable near-field communication frequencies.

[0038] exist Figure 6 The flowchart illustrates exemplary operations associated with the use of device 10 and vision correction lens 36C.

[0039] During the operation of block 80, information associated with the user of device 10 and lens 36C, information associated with lens 36, information associated with device 10, and / or other information can be stored in the control circuit of lens 36C (e.g., in circuit 74 of circuit 70 of lens 36C). As an example, this information can be stored in lens 36C during manufacturing, during a registration process after manufacturing, during use of device 10, or at another suitable time. Information stored in the storage of lens 36C can include information about the user's vision correction needs (e.g., the user's eyeglass prescription used in forming corrective lens element 50, and / or other information about the user's vision deficiency), information about the user's identity (e.g., the user's full name, a username, an email address, or other user identifier), biometric information, information about the user's account settings (e.g., for an online account or other account associated with device 10), information about the user's preferences (e.g., user-selected settings such as display settings, content preferences, etc.), information about the user's pupillary distance settings to be used in establishing lateral spacing between optical modules 36 to accommodate the user's pupillary distance, a passkey, and / or other information. Figure 4 During the operation of block 80, information associated with the user of device 10 and lens 36C, information associated with lens 36, information associated with device 10, and / or other information can be stored in the control circuit of lens 36C (e.g., in circuit 74 of circuit 70 of lens 36C). As an example, this information can be stored in lens 36C during manufacturing, during a registration process after manufacturing, during use of device 10, or at another suitable time. Information stored in the storage of lens 36C can include information about the user's vision correction needs (e.g., the user's eyeglass prescription used in forming corrective lens element 50, and / or other information about the user's vision deficiency), information about the user's identity (e.g., the user's full name, a username, an email address, or other user identifier), biometric information, information about the user's account settings (e.g., for an online account or other account associated with device 10), information about the user's preferences (e.g., user-selected settings such as display settings, content preferences, etc.), information about the user's pupillary distance settings to be used in establishing lateral spacing between optical modules 36 to accommodate the user's pupillary distance, a passkey, and / or other information.

[0040] If lens 36C has not yet been attached to device 10, lens 36C can be removably coupled to a corresponding optical module 36 in device 10 during the operation of block 82.

[0041] During the operation of block 84, device 10 and lens 36C can communicate using near field communication antennas of device 10 and lens 36C. As an example, device 10 can transmit information to lens 36C for storage in lens 36C and / or some or all of the information stored in each lens 36C can be transmitted to one or more near field antennas in device 10 via near field communication. Information transmitted from lens 36C to device 10 can include a passkey or other information for unlocking device 10 for the user, can include information about the user's vision deficiency so that device 10 can be adjusted accordingly, can include lens prescription information (e.g., lens power and other lens properties of corrective lens element 50), can include information about the user's pupillary distance, can include the user's identity (e.g., a user identifier such as a username), and / or can include other information.

[0042] In some cases, device 10 can transmit information to lens 36C through near field communication. For example, user-specific device settings such as user pupil distance settings, user content preferences, user account settings, and / or other information can be wirelessly transmitted from device 10 to lens 36C and stored in lens 36C for subsequent use (e.g., subsequent retrieval by device 10 from lens 36C). In some configurations, device 10 can obtain information from devices other than lens 36C via near field communication. For example, device 10 can obtain the same types of information provided from lens 36C and / or different types of information (e.g., user identifiers, payment authorization information, etc.) from nearby devices such as cellular telephones having near field communication circuitry in communication with the near field communication antenna of device 10 during the operations of block 84.

[0043] During the operations of block 86, device 10 can be operated by a user. As an example, device 10 can be used to display images for the user (e.g., display 14 in optical module 36 can display content for the user). In operation, device 10 can use information received from lens 36C using the near field communication circuitry. As an example, the size of images presented on display 14 by control circuitry 12 of device 10 can be adjusted based on received information about the user's ability to view content at the periphery of the user's vision. As an example, a user having a limited field of view can be provided content that has been reduced in size to fit within the user's field of view. If desired, device 10 can adjust the operation of device 10 based on the identity of the user (e.g., received in a user identifier or other information from one or more of lenses 36C). For example, device 10 can provide a list of content suggestions to the user based on the user's preferences. As another example, one or both of lenses 36C can be used as a key to unlock device 10. When lens 36C is not present, device 10 can remain in a locked state (e.g., device 10 can be prevented from displaying images and / or access to the user's account and / or other information associated with the user can be blocked). In response to verifying the presence of the user by obtaining a user identifier, a cryptographic key associated with the user, or other appropriate information that serves as a digital key for the user, device 10 can unlock the user's account and can allow the user to freely access the functionality of device 10. These are illustrative examples. If desired, other actions can be taken in response to obtaining information from lens 36C or other electronic equipment via near field communication.

[0044] According to one embodiment, there is provided a head-mounted device operable with a removable vision correction lens that transmits near field communication signals, the head-mounted device comprising a head-mounted support structure; left and right displays supported by the head-mounted support structure and configured to provide images viewable through the removable vision correction lens from an eyebox; and a near field communication antenna configured to receive the transmitted near field communication signals.

[0045] According to another embodiment, the eyebox comprises left and right eyeboxes and the removable vision correction lens comprises left and right vision correction lenses, the head-mounted device comprises attachment structures configured to removably couple the vision correction lenses to the head-mounted support structure; a left lens through which left images from the left display are viewable from the left eyebox and a right lens through which right images from the right display are viewable from the right eyebox, the near field communication antenna comprises a coil extending around the right lens.

[0046] According to another embodiment, the attachment structures comprise magnets configured to attract corresponding magnets in the removable vision correction lenses.

[0047] According to another embodiment, the vision correction lens comprises left and right vision correction lenses, the head-mounted support structure comprises a nose bridge portion, and the near field communication antenna is in the nose bridge portion and configured to receive the transmitted near field communication signals from the left and right vision correction lenses.

[0048] According to another embodiment, the near field communication antenna is configured to operate at a frequency less than 100 MHz.

[0049] According to another embodiment, the transmitted near field communication signals comprise vision correction information, and the left and right displays are configured to display images based on the vision correction information of the transmitted near field communication signals.

[0050] According to another embodiment, the transmitted near field communication signals comprise an identifier, and the displays are configured to display the images based on the identifier.

[0051] According to one embodiment, there is provided a head-mounted device operable with a left vision correction lens and a right vision correction lens, the head-mounted device comprising a left optical module and a right optical module, the left optical module having a left display and a left lens configured to display a left image in a left eyebox through the left vision correction lens, and the right optical module having a right display and a right lens configured to display a right image in a right eyebox through the right vision correction lens; a left antenna located in the left optical module; and a right antenna located in the right optical module.

[0052] According to another embodiment, the left antenna comprises a left coil configured to receive a near field communication signal from the left vision correction lens, and the right antenna comprises a right coil configured to receive a near field communication from the right vision correction lens.

[0053] According to another embodiment, the left coil extends around a peripheral edge of the left lens and the right coil extends around a peripheral edge of the right lens.

[0054] According to another embodiment, the near field communication signal received by the left coil and the right coil comprises a signal having a frequency less than 100 MHz.

[0055] According to another embodiment, the head-mounted device comprises a magnet configured to removably attach the left vision correction lens and the right vision correction lens to the left optical module and the right optical module, respectively, in alignment with the left lens and the right lens.

[0056] According to another embodiment, the left vision correction lens and the right vision correction lens comprise respective left vision correction lens elements and right vision correction lens elements, and comprise respective left and right near field communication antennas surrounding the left and right vision correction lens elements, respectively, and the left and right coils are configured to align with the left and right near field communication antennas of the left and right vision correction lenses, respectively, when the left and right vision correction lenses are coupled to the left and right optical modules.

[0057] According to another embodiment, the head-mounted device comprises control circuitry configured to take action in response to receiving the near field communication signal.

[0058] According to another embodiment, the near field communication signal comprises vision correction information, and the control circuitry is configured to take action based on the vision correction information.

[0059] According to another embodiment, the near field communication signal includes user information, and the control circuit is configured to take action based on the user information.

[0060] According to another embodiment, the head-mounted device includes a magnet configured to removably attach the left vision correction lens and the right vision correction lens to the left optical module and the right optical module, respectively, in alignment with the left lens and the right lens.

[0061] According to one embodiment, a head-mounted device vision correction lens configured to be removably coupled to a head-mounted device is provided, the head-mounted device vision correction lens including a vision correction lens housing; a vision correction lens element located in the vision correction lens housing; a coil located in the vision correction lens housing, the coil configured to form a near field communication antenna; and a near field communication circuit coupled to the coil, the near field communication circuit configured to transmit a near field communication signal to a head-mounted device using the near field communication antenna.

[0062] According to another embodiment, the coil extends around the vision correction lens element.

[0063] According to another embodiment, the near field communication circuit is further configured to receive wireless power from the head-mounted device using the near field communication antenna.

[0064] The foregoing is merely illustrative and various modifications can be made to the described embodiments. Such modifications can be independently implemented or combined in any combination.

Claims

1. A head-mounted device operable with removable vision correction lenses that transmit near field communication signals, the head-mounted device comprising: a head-mounted support structure; left and right displays supported by the head-mounted support structure and configured to provide images viewable through the removable vision correction lenses from eyeboxes; a lens mounted in an optical module of the head-mounted device; an attachment structure in the optical module configured to removably attach a given one of the removable vision correction lenses to the optical module; and a near field communication antenna configured to receive the transmitted near field communication signals, wherein the near field communication antenna comprises a coil that extends around a peripheral edge of the lens, and wherein the coil is configured to overlap a corresponding coil of the given removable vision correction lens when the given removable vision correction lens is attached to the optical module.

2. The head-mounted device of claim 1, wherein the eyeboxes comprise left and right eyeboxes, wherein the given removable vision correction lens is a right vision correction lens, wherein the lens is a right lens, and wherein the removable vision correction lenses comprise a left vision correction lens, the head-mounted device further comprising: an additional attachment structure configured to removably couple the left vision correction lens to the head-mounted support structure; a left lens, wherein left images from the left display are viewable from the left eyebox through the left lens and the left vision correction lens, and wherein right images from the right display are viewable from the right eyebox through the right lens and the right vision correction lens.

3. The head-mounted device of claim 2, wherein the attachment structure and the additional attachment structure comprise magnets configured to attract corresponding magnets in the removable vision correction lenses.

4. The head-mounted device of claim 1, wherein the near field communication antenna is configured to operate at a frequency less than 100 MHz.

5. The head-mounted device of claim 1, wherein the transmitted near field communication signals comprise vision correction information, and wherein the left and right displays are configured to display the images based on the vision correction information of the transmitted near field communication signals.

6. The head-mounted device of claim 1, wherein the transmitted near field communication signals comprise an identifier, and wherein the displays are configured to display the images based on the identifier.

7. A head-mounted device operable with left and right vision correction lenses, the head-mounted device comprising: ​ a left optical module and a right optical module, wherein the left optical module has a left display and a left lens configured to display a left image in a left eyebox through the left vision correction lens, and wherein the right optical module has a right display and a right lens configured to display a right image in a right eyebox through the right vision correction lens; a left antenna located in the left optical module and configured to communicate with a corresponding coil in the left vision correction lens; and a right antenna located in the right optical module and configured to communicate with a corresponding coil in the right vision correction lens.

8. The head-mounted device of claim 7, wherein the left antenna comprises a left coil configured to receive a near field communication signal from the left vision correction lens, and wherein the right antenna comprises a right coil configured to receive a near field communication from the right vision correction lens.

9. The head-mounted device of claim 8, wherein the left coil extends around a peripheral edge of the left lens, and wherein the right coil extends around a peripheral edge of the right lens.

10. The head-mounted device of claim 9, wherein the near field communication signal received by the left coil and the right coil comprises a signal having a frequency less than 100 MHz.

11. The head-mounted device of claim 10, further comprising a magnet configured to removably attach the left vision correction lens and the right vision correction lens to the left optical module and the right optical module, respectively, in alignment with the left lens and the right lens.

12. The head-mounted device of claim 8, wherein the left vision correction lens and the right vision correction lens comprise respective left and right vision correction lens elements, and comprise respective left and right near field communication antennas around the left and right vision correction lens elements, respectively, and wherein the left coil and the right coil are configured to align with the left and right near field communication antennas of the left and right vision correction lenses, respectively, when the left and right vision correction lenses are coupled to the left and right optical modules.

13. The head-mounted device of claim 8, further comprising a control circuit configured to take action in response to receiving the near field communication signal.

14. The head-mounted device of claim 13, wherein the near field communication signal comprises vision correction information, and wherein the control circuit is configured to take action based on the vision correction information.

15. The head-mounted device of claim 13, wherein the near field communication signal comprises user information, and wherein the control circuit is configured to take action based on the user information. ​ 16. The head-mounted device of claim 7, further comprising a magnet configured to removably attach the left and right vision correction lenses to the left and right optical modules, respectively, in alignment with the left and right lenses.

17. A head-mounted device vision correction lens configured to be removably coupled to a head-mounted device, the head-mounted device vision correction lens comprising: a vision correction lens housing; a vision correction lens element located in the vision correction lens housing; a coil located in the vision correction lens housing, wherein the coil is configured to form a near field communication antenna; and a near field communication circuit coupled to the coil, the near field communication circuit configured to transmit near field communication signals to the head-mounted device using the near field communication antenna.

18. The head-mounted device vision correction lens of claim 17, wherein the coil extends around the vision correction lens element.

19. The head-mounted device vision correction lens of claim 18, wherein the near field communication circuit is further configured to receive wireless power from the head-mounted device using the near field communication antenna. ​

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