Abstract: A display panel for concurrent video output and eye position tracking. The display panel includes a substrate, a plurality of visible light emitting diodes (LEDs) positioned on a side of the substrate, and a plurality of light detectors positioned on the side of the substrate. The visible LEDs transmit quasi-collimated visible light propagating away from the side of the substrate. The light detectors capture invisible light propagating toward the side of the substrate, reflected from an eye of the user. In some embodiments, non-visible LEDs are formed on the side of the substrate. The visible LEDs, light detectors, and non-visible LEDs may be arranged to form pixels of the display panel. The quasi-collimated light emitted from the visible LEDs reduces spread into beam paths of the invisible light between the non-visible LEDs and the light detectors.

Abstract: A Pancharatnam Berry Phase (PBP) color corrected structure is presented that comprises a plurality of switchable gratings and a plurality of PBP active elements. Each switchable grating has an inactive mode when reflects light of a specific color channel, of a set of color channels, and transmits light of other color channels in the set of color channels, wherein the specific color channel is different for each of the plurality of switchable gratings, and to have an active mode to transmit light that is inclusive of the set of color channels. The PBP active elements receive light output from at least one of the plurality of switchable gratings. Each of the PBP active elements is configured to adjust light of a different color channel of the set of color channels by a same amount to output light corrected for chromatic aberration for the set of color channels.

Abstract: An elastomeric interface layer (elayer) is formed over multiple light emitting diode (LED) dies by depositing photoresist materials across multiple LED dies, and using the LED dies as a photolithography mask to facilitate formation of the elayer on each LED die. The elayer facilitates adhesive attachment of each LED die with a pick and place head (PPH), allowing the LED dies to be picked up and placed onto a display substrate including control circuits for sub-pixels of an electronic display. In some embodiments, the LED dies are micro-LED (?LED) dies.

Abstract: An auto-focus head-mounted display (HMD) dynamically generates aberration-adjusted images based on the position and/or orientation of an eye of the user. An aberration-adjusted image is an image distorted to correct aberrations that would otherwise occur at a retina of the user due to image light passing through optics of the HMD that contains one or more optical imperfections. The aberration-adjusted image corrects the aberrations caused by these optical imperfections so that the resulting retinal image is free of optical aberrations due to the HMD while preserving correct eye optical aberrations that correlate with a current accommodative state of the eye.

Abstract: Friction joints for use with head mounted displays are disclosed herein. In various embodiments, a head mounted display includes a front display module and a strap assembly. The strap assembly includes first and second connectors coupling the strap assembly to the front display module. The connectors allow the strap assembly to be moved toward and away from the front display module. The connectors are coupled to the front display module with first and second friction joints.

Abstract: A haptic device comprises a wearable material configured to a portion of a user. A vibrotactile actuator is coupled to the wearable material and provides haptic feedback in accordance with a drive signal. A driver circuit is electrically coupled to the vibrotactile actuator and provides the drive signal to the vibrotactile actuator. The driver circuit includes an alternating current (AC) voltage source assembly that has a first AC voltage source and a second AC voltage source, each having a terminal. The terminal of the first AC voltage source is electrically coupled to the vibrotactile actuator. A capacitive element electrically is coupled to the terminal of the negative AC voltage source and a regulating element. The regulating element includes a first coupling point and a second coupling point. The first coupling point is electrically coupled to the capacitive element and the vibrotactile actuator, and the second coupling point is grounded.

Abstract: A head-mounted display (HMD) includes an electronic display configured to emit image light, an optical assembly that provides optical correction to the image light, an eye tracking system, and a varifocal module. The optical assembly includes a back optical element configured to receive the image light from the electronic display, and a coupling assembly configured to couple a front optical element to a location within the optical assembly such that the front optical element receives light transmitted by the back optical element. The optical correction is determined in part by an optical characteristic of the front optical element that is replaceable. The eye tracking system determines eye tracking information for a first eye of a user of the HMD. A varifocal module adjusts focus of images displayed on the electronic display, based on the eye tracking information and the optical correction.

Abstract: A source assembly for providing light. The source assembly comprises a source element array, and a scanning mirror assembly. The source element array includes a super luminous diode (SLED) array of SLEDs that are configured to emit light. The SLED array is on a single chip. Each SLED in the SLED array may emit light in the same color channel (e.g., green). There may be multiple SLED arrays that each are on respective chips and each are associated with a different color channel (e.g., one is red, one is blue, and one is green). The scanning mirror assembly is configured to scan light emitted from the SLED array (and/or multiple SLED arrays) to an entrance location of an output waveguide (e.g., of a waveguide display) as scanned image light.

Abstract: A wearable actuation device allows a user to interact with virtual objects in an AR or VR environment by providing force or haptic feedback. The wearable actuation device includes one or more actuator assemblies anchored to each of the user's fingers and a controller configured to communicate with a head mounted display. Embodiments of the actuator assembly include an electrorheological actuator, an optically driven actuator, and a piezo actuator sandwich assembly each of which is configured to undergo a reversible change in stiffness in response to an applied voltage or current. In one or more embodiments, the actuator assembly is configured to stiffen, elongate, compress in response to the application of a current or voltage waveform. In still other embodiments, the actuator assembly determines a measures of the current stress or strain being applied by the user on the virtual object.

Abstract: In systems and methods for adjusting the position of a headset element (e.g., a display and/or other optical element), coherent light (e.g., a laser beam) is transmitted through a display of a headset to produce a diffraction pattern on a detector, which detects the diffraction pattern. The orientation of the headset element is determined based in part on the detected diffraction pattern. Based on the determined orientation and a target orientation, an adjustment to the orientation of the headset element is determined. The position of the headset element is adjusted based on the determined adjustment. This method may be repeated until the headset element is determined to be correctly oriented.

Abstract: 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.

Abstract: A head mounted display comprises an eye tracking system configured to enable eye tracking using polarization. The eye tracking system includes one or more illumination sources and an optical detector comprising polarization sensitive pixels. The one or more illumination sources are configured to illuminate a user's eye and generate reflections directed towards the optical detector. The eye tracking system determines, for each polarization sensitive pixel in a subset of the polarization sensitive pixels, one or more estimation parameters. The eye tracking system determines, for the subset of the polarization sensitive pixels, depth information for one or more glints associated with one or more surfaces of the eye, based in part on the polarization of the reflections and the one or more estimation parameters. The determined depth information is used to update a model of the eye. The eye tracking system determines eye tracking information based on the updated model.

Abstract: A display device that includes a liquid crystal (LC) panel, a back light unit (BLU), a first data driver, and a second data driver. The back light unit (BLU) emits light during an illumination portion of a frame period and does not emit light during a remaining portion of the frame period. A first data driver writes data to a first portion of the pixels of the LC panel. A second data driver writes data to a second portion of the pixels of the LC panel. The first and second data drivers write data at an overlapping time during a write portion of the frame period. The write portion overlaps in time with the remaining portion of the frame period during which the BLU does not emit light.

Abstract: A wavelength tuning system determines a temperature calibrated to a DOE of a structured light (SL) projector. The wavelength tuning system includes a camera and controller. The camera captures images of a SL pattern projected by the SL projector. The controller generates tuning instruction. The tuning instructions cause a wavelength regulator of the SL projector to set a light source of the SL projector to different temperatures. The tuning instruction also cause the camera to capture images of the structured light pattern at each of the different temperatures. Using at least some of the captured images, the controller determines the temperature calibrated to the DOE. In one embodiment, the temperature calibrated to the DOE corresponds to a wavelength of light emitted by the light source that result in an estimated minimum power of a zeroth order diffracted beam of the SL pattern.

Abstract: A haptic device provides haptic sensation to a user. The haptic device comprises a haptic plate and a plurality of actuators. The haptic plate includes a center portion and an outer portion that circumscribes the center portion. The plurality of actuators is coupled to the outer portion of the haptic plate. Of the plurality of actuators, one or more actuators are configured to generate, in accordance with haptic instructions, a haptic wave that converges to a specific waveform at a specific region of the center portion of the haptic plate. The shape of the specific waveform and the location of the specific region on the center portion of the haptic plate are based in part on the haptic instructions.

Abstract: A system for calibrating a liquid crystal display (LCD) includes a plurality of temperature sensors, a storage medium, and a controller. Each temperature sensor measures a current temperature of at least one pixel in the LCD. The storage medium stores information about latencies for any LC-based pixel, wherein each latency corresponds to a time period for transition from a starting to an ending illumination state for one temperature of the LC-based pixel. The controller determines, based on the current temperature, the transition information and frame information, a time for each pixel in at least a portion of the LCD to transition from a first to a second illumination state. The controller computes, based on transition times, an LC transition time for at least the portion of the LCD and performs calibration of at least the portion of the LCD based on the LC transition time.

Abstract: A head mounted display (HMD) for displaying variable resolution frames for focus and non-focus areas of a user's eye. The HMD includes the display panel including gate lines and data lines, and a display driver coupled to the display panel. The display driver includes a gate signal duplicator that duplicates gate signal values across multiple adjacent gate lines for the non-focus area, and provides individual gate signals to gate lines for the focus area. The display driver may also include a programmable oscillator that generates a clock signal for the gate lines as a function of the size of the focus area relative to the size of the frame. In some embodiments, the display driver includes a data signal duplicator that duplicates data signal values across multiple adjacent data lines for the non-focus area, and provides individual data signals to data lines for the focus area.

Abstract: An organic light emitting diode (OLED) display including a conic OLED panel portion and a base OLED panel portion. The conic OLED panel portion includes peripheral display surfaces forming a truncated conic shape with an open base region around a center of the conic OLED panel portion. The OLED base portion includes a display surface. The base OLED panel portion is positioned to cover the open base region of the conic OLED panel portion such that the peripheral display surfaces surround the base display surface. The OLED display approximates a circular convex display. The conic OLED panel portion may be fabricated from a flat, flexible OLED panel portion that is bent along the fold regions defining bending axes between the peripheral display surfaces to form the truncated conic shape.