Facebook Technologies, LLC

Oculus, Vr, LLC

Bruce A Cleary, Iii

Tristan Thomas Trutna

Sean Jason Keller

David R Perek

Brian Michael Scally

Ke-Yu Chen

Raymond King

A wearable device to be worn on a body part includes a magnetic field generator, a magnetic field sensor, and a controller. The controller instructs the magnetic field generator to generate a magnetic field, instructs magnetic field sensor to measure a sensor signal, and to determine a position of the body part based on the measured sensor signal. The magnetic field sensor can include multiple sensor elements with known or solved positions relative to one another. The wearable device can be a glove. The controller may determine a bend angle of a finger or an angle between two fingers.

Bend angle sensing mechanism for wearable device

A wearable device to be worn on a body part includes deformation sensors and a controller. The controller instructs the deformation sensors to measure deformation forces. The controller determines a position of the body part based on the measured deformation forces and a transfer function that maps deformation forces to positions of a same or corresponding body part. The transfer function is generated based on measurements from calibration and deformation sensors to sense corresponding positions of the body part and deformation forces. A calibration sensor may include a magnetic field generator and a magnetic flux sensor. The wearable device may be a glove and the body part may be a hand.

Kinematic model for hand position

A virtual reality (VR) headset includes an electronic display element that outputs image light via a plurality of sub-pixels that are separated from each other by a dark space. To mask the dark space between adjacent sub-pixels in the electronic display element, an optics block (e.g., a lens) in the VR headset oscillates or the electronic display element oscillates. For example, a piezoelectric material is coupled to the electronic display element or to the optics block. When a voltage is applied to the piezoelectric material, vibration of the piezoelectric material causes oscillation of the electronic display element or the optics block. The oscillation generates blur spots in the image light that mask the dark space between adjacent sub-pixels, with each blur spot corresponding to a blurred image of a sub-pixel in the image light.

Using oscillation of optical components to reduce fixed pattern noise in a virtual reality headset

A wearable device (such as a glove or other control adapted to be worn on a portion of a body) includes multiple magnetic field generators at various locations on the wearable device and a magnetic flux sensor at a predetermined position relative to the wearable device. A position determines spatial positions of locations of the wearable device based on magnetic fields generated by various magnetic field generators and detected by the magnetic flux sensor. In some embodiments, the magnetic field generators have known positions relative to each other. Additionally, each magnetic field generator may generate a magnetic field in response to an input signal having a particular attribute, allowing the magnetic flux sensor to identify magnetic fields generated by different magnetic field generators.

Detecting positions of a device based on magnetic fields generated by magnetic field generators at different positions of the device

A deformation sensing apparatus comprises an elastic substrate, a first strain-gauge element formed on a first surface of the elastic substrate, and configured to output a first signal in response to a strain applied in a first direction, and a second strain-gauge element formed on a second surface of the elastic substrate opposite to the first surface, and configured to output a second signal in response to a strain applied in the same first direction.

Resistive-capacitive deformation sensor

A wearable heat transfer device provides a user with haptic feedback providing sensations of hot or cold. The wearable heat transfer device comprises a heat source/sink and a programmable interface having heat transfer characteristics that are modified based on a signal received by the programmable interface. For example, a thickness of the programmable interface changes based on the received signal, altering heat transfer by the programmable interface. In another example, an electric field is applied to the programmable interface, changing one or more properties of the programmable interface affecting heat transfer.

Wearable accessory with heat transfer capability

A deformation sensing apparatus comprises an elastic substrate, a conductive element, and an additional conductive element. The conductive element includes conductive joints that are separated from each other by resolving elements along a length of the conductive element. Different combinations of conductive joints and resolving elements correspond to different segments of the deformation sensing apparatus. Based on a change in capacitance between a conductive joint and the additional conductive element when a strain is applied to the deformation sensing apparatus, the deformation sensing apparatus generates a signal that allows determination of how the strain deforms the deformation sensing apparatus.

Indexable strain sensor

A deformation sensing apparatus comprises a propagation channel, a transmitter coupled to a first end of the propagation channel, a receiver coupled to a second end of the propagation channel, and a controller. The propagation channel is deformable and the controller instructs the transmitter to transmit a signal, instructs the receiver to capture one or more measurements of the transmitted signal, and determines a bend in the propagation channel based on the one or more measurements. In one embodiment, the transmitter is a light source, the propagation channel is an optical fiber, and the receiver is a photodiode. The propagation channel is made of a material that has a variation in a refractive index responsive to applied mechanical stress. The deformation sensing apparatus may also include a polarizer positioned between the transmitter and the propagation channel and a wave plate positioned between the propagation channel and the receiver.

Birefringence deformation sensing apparatus having a controller to instruct the function of a transmitter and a receiver

A deformation sensing apparatus comprises a transmitter coupled to a propagation channel, and a receiver coupled to the same first end of the propagation channel. The propagation channel of the deformation is a transmission line, where a signal is transmitted by the transmitter and reflected signals are measured by the receiver responsive to the transmitted signals. A bend in the propagation channel results in a change in impedance of the transmission line at a location of the bend, resulting in a reflection of the signal from the location of the bend. The time delay of the reflected signals corresponds to the distance along the length of the channel where a bending of the propagation channel occurs. The amplitude of the reflected signal corresponds to a bend angle.

Wave reflection deformation sensing apparatus

A kinesthetic sensor measure angular displacement of body parts of users by measuring a density of substances contained in a conduit of the kinesthetic sensor. For example, the kinesthetic sensor measures the density of substance including in a conduit by transmitting a signal into the conduit and measuring the signal after the signal passes through the conduit and one or more substances included in the conduit. Based on the density of the one or more substances included in the conduit from the measured signal, an angular displacement of a user's body part proximate to the kinesthetic sensor is determined. Kinesthetic sensors may use different architectures such as an open-loop, a closed-loop architecture, or an architecture using blood vessels as conduits. Additionally, kinesthetic sensors can be flexible to conform to physical contours of different body parts.

Kinesthetic sensors for determining angular displacements

A system modifies data generating haptic feedback to account for changes in user perception of haptic feedback. The system identifies haptic data and determines an estimated amplitude of haptic feedback corresponding to a portion of the haptic data. Responsive to the estimated amplitude of the haptic feedback corresponding to the portion of the haptic data exceeding a threshold value, a refractory period is determined that will occur after haptic feedback corresponding to the portion of the haptic data is applied to the user. The portion of the haptic data is provided to an input interface, and a set of haptic data associated with times within a duration of the refractory period from the identified haptic data is removed to form an adjusted data set that is provided to the input interface to provide haptic feedback to the user in accordance with adjusted haptic data set.

Modifying haptic feedback provided to a user to account for changes in user perception of haptic feedback

A system tracks movement of the VR input device relative to a portion of a user's skin, track movement of the VR input device relative to a physical surface external to the VR input device, or both. The system includes an illumination source integrated with a tracking glove coupled to a virtual reality console, and the illumination source is configured to illuminate a portion of skin on a finger of a user. The system includes an optical sensor integrated with the glove, and the optical sensor is configured to capture a plurality of images of the illuminated portion of skin. The system includes a controller configured to identify differences between one or more of the plurality of images, and to determine estimated position data based in part on the identified differences.

Optical hand tracking in virtual reality systems

A deformation sensing fabric comprises a fabric substrate comprising a first fabric layer and a first conductive element woven into the first fabric layer. The first conductive element outputs a first instrumented signal, responsive to an applied stimulus signal, indicative of a measure of change in an electrical property of the first conductive element in response to a strain applied to the fabric substrate along a long-axis of the first conductive element. The first conductive element is instrumented by a measurement system which stimulates the first conductive element and measures an electrical property of the first conductive element.

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Seattle, WA, United States of America

Bruce A Cleary, Iii