Optical systems with lens-based static foveation

    公开(公告)号:US12292572B2

    公开(公告)日:2025-05-06

    申请号:US18514710

    申请日:2023-11-20

    Applicant: Apple Inc.

    Abstract: An electronic device may include a display module that produces light having an image, a lens that directs the light to a waveguide, and a waveguide that directs the light to an eye box. The lens may produce a foveated image in the light by applying a non-uniform magnification to the image in the light. The non-uniform magnification may vary as a function of angle within a field of view of the lens. This may allow the foveated image to have higher resolution within the central region than in the peripheral region. Performing foveation using the lens maximizes the resolution of images at the eye box without increasing the size of the display module. Control circuitry on the device may apply a pre-distortion to the image that is an inverse of distortion introduced by the lens in producing the foveated image.

    Head-Mounted Display Systems With Gaze Tracker Alignment Monitoring

    公开(公告)号:US20240219735A1

    公开(公告)日:2024-07-04

    申请号:US18604849

    申请日:2024-03-14

    Applicant: Apple Inc.

    Abstract: A head-mounted device may have displays that provide images. Waveguides may be used in conveying the images to eye boxes. The waveguides may overlap lenses in a glasses frame or other head-mounted support structure. The waveguides and lenses may be transparent. This allows real-world objects to be viewed from the eye boxes. Infrared-light reflectors may overlap the lenses. Gaze tracking system light sources may supply infrared light that reflects from the infrared-light reflectors to the eye boxes to illuminate a user's eyes. Gaze tracking system cameras capture gaze tracking images of the eyes from the eye boxes to track the user's gaze. Fiducials associated with the infrared-light reflectors may be monitored using the gaze tracking system cameras. This allows components such as the gaze tracking system cameras to be calibrated.

    Head-mounted devices with forward facing cameras

    公开(公告)号:US11950022B1

    公开(公告)日:2024-04-02

    申请号:US17187289

    申请日:2021-02-26

    Applicant: Apple Inc.

    Abstract: A head-mounted device may have a head-mounted support structure with a left side portion, a right side portion, and a transparent front portion forming a lens. The lens may extend across the front of a user's face between the left and right side portions. The lens may have a mirror coating or other optical coating that helps obscure objects on the inner side of the lens when viewed from an exterior region surrounding the head-mounted device. Left and right forward-facing cameras with overlapping fields of view may be used to capture visible-light images through the lens. The cameras may also be used for gaze tracking. Left and right light sources may provide eye illumination that reflects from the lens into left and right eye boxes. Images from the eye boxes may reflect from the lens towards the left and right forward-facing cameras.

    Optical Systems with Lens-Based Static Foveation

    公开(公告)号:US20240085706A1

    公开(公告)日:2024-03-14

    申请号:US18514710

    申请日:2023-11-20

    Applicant: Apple Inc.

    Abstract: An electronic device may include a display module that produces light having an image, a lens that directs the light to a waveguide, and a waveguide that directs the light to an eye box. The lens may produce a foveated image in the light by applying a non-uniform magnification to the image in the light. The non-uniform magnification may vary as a function of angle within a field of view of the lens. This may allow the foveated image to have higher resolution within the central region than in the peripheral region. Performing foveation using the lens maximizes the resolution of images at the eye box without increasing the size of the display module. Control circuitry on the device may apply a pre-distortion to the image that is an inverse of distortion introduced by the lens in producing the foveated image.

    Heat dissipation for head-mountable device

    公开(公告)号:US11751366B1

    公开(公告)日:2023-09-05

    申请号:US17228589

    申请日:2021-04-12

    Applicant: Apple Inc.

    CPC classification number: H05K7/20963 G02B27/0172 G02B27/0176 G02B2027/0178

    Abstract: A head-mountable device can provide passive cooling that utilizes surfaces of an optical assembly to allow heat to be managed in a manner that does not detrimentally impact the visual information displayed to the user. Lenses can be coated with a transparent and thermally conductive material, such as silver nanowire. Such a thermal layer can provide superior thermal conductivity, transmittance, flexibility, flat transmission, low cost, and angular color stability. The thermal layer can passively manage heat by increasing the surface area across which heat can be efficiently dissipated.

    Head-Mounted Display Systems With Alignment Monitoring

    公开(公告)号:US20240402500A1

    公开(公告)日:2024-12-05

    申请号:US18805187

    申请日:2024-08-14

    Applicant: Apple Inc.

    Abstract: A head-mounted device may have a left display and a right display that provide respective left and right images. Left and right optical combiner systems may be configured to pass real-world light to left and right eye boxes while directing the left and right images respectively to the left and right eye boxes. Misalignment of the left and right images with respect to the left and right eye boxes may be detected using gaze tracking systems, using cameras such as front-facing cameras in conjunction with a database of known real-world object properties, using visual inertial odometry systems formed from cameras and inertial measurement units, or using one or more sensors in a portable head-mounted device case or other item with a receptacle configured to receive a head-mounted device. Compensating adjustments may be made to the images based on the measured misalignment.

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