Abstract: An elongated collimator collimates light generated by a microdisplay for coupling to an exit pupil expander of a waveguide. The elongated collimator includes a first portion having four or more freeform surfaces that fold the optical path of the light and then direct the light via total internal reflection through an elongated flat (or nearly flat) second portion of the collimator to form a pupil within a lens of an eyewear display device. The elongated collimator delivers collimated light to a pupil located toward the center of the lens where the light can be collected by an exit pupil expander having a relatively small footprint.

Abstract: A non-planar lightguide directs a display light from an incoupler surface towards an eye of a user via a reduced number of internal reflective interactions with a world-facing surface of the non-planar lightguide and an eye-facing lens surface of the non-planar lightguide.

Abstract: A display system includes a microdisplay and a curved light-guide to direct and magnify light from the microdisplay to a user's eye. The display system includes an incoupler that is thicker than the curved lightguide to couple light from the microdisplay into the curved lightguide and an out-coupler tilted at an angle to receive two bounces of display light and couple the display light out of the curved lightguide, resulting in a large eyebox. In some embodiments, the curved lightguide includes a low-index coating on a world-side surface with a gap through which side image light escapes and a sunglass coating on a lens to absorb the side image light. The curved light-guide includes a half-wave plate (HWP) to flip an input polarization for a main image to an orthogonal polarization and a dielectric mirror to act as a weak analyzer to dim side images.

Abstract: A head mounted display (HMD) provides multiple fields of view of a single micro-display by time-multiplexing the provision of light of different polarizations. The HMD includes a micro-display, a lightguide, and a plurality of combiners coupled to the lightguide, wherein each combiner is configured to combine light of a different polarization. For example, the HMD can include two combiners, with one combiner configured to combine P-polarized light and the other combiner configured to combine S-polarized light. A polarizer switch is included in a filter stack for the lightguide, and a control module controls the switch to alternate the provision of light having P-polarization and S-polarization, respectively. The light of each polarization provides a different field of view of the micro-display.

Abstract: A head-mounted display includes a microdisplay configured to emit light representative of an image and provide the emitted light to an optics relay included in the head-mounted display. The optics relay is configured to magnify the image emitted by the microdisplay by a predetermined power such that an intermediate image based on the magnified image is formed in a curved lightguide of the head-mounted display. The intermediate image is then provided by the curved lightguide to an optical output system included in or otherwise coupled to the curved lightguide. The optical output system then provides at least a portion of the intermediate image to the eye of a user.

Abstract: An HMD employs a multifocal module having one or more voltage controlled optical elements. By changing the voltage applied to the one or more optical elements, the HMD can change the focal length of an image generated by the micro-display. The multifocal module can include a cholesteric liquid crystal (CLC) element and a polarizer switch. By controlling the voltage applied to each of the CLC element and the polarizer switch, the HMD can change the focal length of the image passed through the multifocal module. The HMD can thereby change the focal length of any image generated by the micro-display.

Abstract: A head mounted display includes a combiner configured to receive display light from a micro-display. The world-facing surface of the combiner has a curvature that corresponds to a user's vision correction prescription. The head mounted display also includes a corrective layer having a second curvature that corresponds to the user's vision correction prescription. The corrective layer is disposed on the eye-facing surface of the combiner such that the focal point of the display light is adjusted for the specific user as the display light exits the combiner towards the user's eye.

Abstract: The disclosure herein presents an eyebox expander for a wearable head mounted display. The eyebox expander includes a first liquid crystal layer: an electrode arrangement to apply a voltage to the first liquid crystal layer to modify an orientation associated with the first liquid crystal layer; and a compensation layer to redirect light passing through the eyebox expander based on the modification of the orientation associated with the first liquid crystal layer.

Abstract: A head mounted display (HMD) device and method of manufacturing the same. The HMD includes a frame housing a micro-display to project display light, a lightguide configured to receive the display light from the micro-display, and a corrective layer having a world-side surface coupled to the eye-side surface of the lightguide. The lightguide is further configured to have a world-side surface with a radius of curvature based on an ophthalmic corrective prescription and an eye-side surface having an outcoupler feature formed thereon such that the coupled lightguide and corrective layer form a lens configured to fit within the frame.

Abstract: A head mounted display includes an eyeglasses frame, a lens framed in the eyeglasses frame, and a light engine disposed in the eyeglasses frame. The lens includes an optical shell comprising a world-facing spherical surface and an opposing eye-facing surface and a curved lightguide disposed in the optical shell. The curved lightguide includes an incoupler surface, a first freeform surface facing the world-facing spherical surface, and a second freeform surface facing the eye-facing surface. The lens further includes a first low refractive index region disposed between the first freeform surface and a first conformal freeform surface of the optical shell and a second low refractive index region disposed between the second freeform surface and a second conformal freeform surface of the optical shell.

Abstract: A head-wearable display device is configured to support a plurality of combiners (e.g., at least two combiners) to expand an eyebox associated with the head-wearable display device. The plurality of combiners may expand the pupil and the head-wearable display device may be configured to align the magnification between the plurality of combiners, such that a single magnified virtual image with an expanded eyebox may be delivered to the user.

Abstract: A mobile computing device includes an emissive display panel, where the panel is used as a grating, and spectrometer optics positioned behind/below the emissive display panel. A mobile computing device includes an emissive display panel and a spectrometer positioned below the emissive display panel. The emissive display panel includes a first periodic pattern of pixels that include one or more LEDs and a second periodic pattern of circuit elements that control the pixels, where the first and second periodic patterns are configured to diffract light received from outside the device, which passes through the emissive display, and where the diffraction is wavelength-dependent. The spectrometer is configured to detect intensities of different wavelength ranges of the diffracted light.

Abstract: Systems, devices, and methods are described in which one or more tunable lens elements are incorporated within a lens structure communicatively coupled to a wearable display device operable to present augmented reality (AR) content to a user. The lens structure includes a display optics lens layer having a provided AR display, one or more eye-side lens layers disposed adjacent to the display optics lens layer and facing an eye of the user, and one or more world-side lens layers disposed adjacent to the display optics lens layer and facing away from the eye of the user. The world-side lens layers includes a tunable lens component to selectively adjust a focal modulation of at least a portion of a real-world view of the user via the lens structure.

Abstract: Systems, devices, and techniques provide an increased size of an eyebox presented by a wearable display device by utilizing multiple outcouplers, each including a set of multiple holographic mirrors. Light from a micro-display is polarized via a controllable polarizer that switches between s-type and p-type polarization, collimated, passed to a TIR waveguide, and directed via multiple outcouplers to an eye of a user. The outcouplers may include one or more angular bandwidth holograms that reflect light that is incident on the hologram at a specific angle or a specific range of angles.

Abstract: Techniques for implementing a partially curved lightguide with pupil replicators are disclosed. A partially curved lightguide includes an embedded collimator with surfaces that act to collimate light for display prior to the light encountering a surface in a pupil expansion region of an exit pupil expander. By collimating the light within the lightguide rather than collimating the light prior to entering the lightguide, the requisite volume of a form factor of an AR display is minimized by eliminating select collimating optics and thus enabling a less bulky volume of the AR display in the region of the light source. Using techniques disclosed herein, a partially curved lightguide with pupil replicators is achievable in an eyewear display system having a form factor similar to traditional eyeglasses and curved, thin lenses.

Abstract: A head mounted display includes a combiner configured to receive display light from a micro-display. The world-facing surface of the combiner has a curvature that corresponds to a user's vision correction prescription. The head mounted display also includes a corrective layer having a second curvature that corresponds to the user's vision correction prescription. The corrective layer is disposed on the eye-facing surface of the combiner such that the focal point of the display light is adjusted for the specific user as the display light exits the combiner towards the user's eye.

Abstract: An eyewear device includes a lightguide having a world-side surface and an eye-side surface, a display oriented to emit light toward the lightguide, and a beam steering element that includes a first polarization grating positioned along an optical path between the display. The first polarization grating diffracts light emitted by the display into orders having different polarizations and the orders are selectively conveyed into different eyeboxes. The eyewear device also includes a frame that supports the lightguide, the display, and the first polarization grating. In some cases, the different polarizations include a right circular polarization or a left circular polarization and the beam steering element includes a polarization dependent filter that filters right circularly polarized light in a first state and left circularly polarized light in a second state.

Abstract: A head mounted display (HMD) system employs a holographic element in the optical path of the HMD to direct light to a user's eye. The HMD includes a micro-display, a lightguide, and a holographic element coupled to the lightguide. The holographic element is coupled to a polarization film, and together the element and film reflect and transmit light of different polarities in a specified pattern to assist the lightguide in directing light to the user's eye. For example, the hologram and polarization film can be configured to pass R-polarized light and reflect L-polarized light, thereby directing light from the waveguide along a specified path.

Abstract: A head mounted display includes a combiner configured to receive display light from a micro-display. The world-facing surface of the combiner has a curvature that corresponds to a user's vision correction prescription. The head mounted display also includes a corrective layer having a second curvature that corresponds to the user's vision correction prescription. The corrective layer is disposed on the eye-facing surface of the combiner such that the focal point of the display light is adjusted for the specific user as the display light exits the combiner towards the user's eye.

Abstract: A head-wearable display device is configured to support a plurality of combiners (e.g., at least two combiners) to expand an eyebox associated with the head-wearable display device. The plurality of combiners may expand the pupil and the head-wearable display device may be configured to align the magnification between the plurality of combiners, such that a single magnified virtual image with an expanded eyebox may be delivered to the user.