公开(公告)号：US11221488B1

公开(公告)日：2022-01-11

申请号：US16917323

申请日：2020-06-30

Applicant: Apple Inc.

Inventor： Miikka M. Kangas ,  Yu Horie ,  Ehsan Arbabi ,  Patrick R. Gill ,  Jeffrey G. Koller

IPC: G02F1/1333 ,  G02B27/01 ,  G02B27/00 ,  G02F1/03 ,  G02C7/08

Abstract: A pair of eyeglasses may include one or more adjustable lenses that are each configured to align with a respective one of a user's eyes. The adjustable lenses may include a foveated liquid crystal adjustable lens stacked with a non-liquid-crystal adjustable lens such as a fluid-filled lens or an Alvarez lens. The foveated adjustable lens may include electrically modulated optical material such as one or more liquid crystal cells. The liquid crystal cells may include arrays of electrodes that extend along one, two, three, four, or more than four directions. Control circuitry may apply control signals to the array of electrodes in each liquid crystal cell to produce a desired phase profile. Each lens may be foveated such that portions of the lens within the user's gaze exhibit a different phase profile than portions of the lens outside of the user's gaze.

公开(公告)号：US12067161B1

公开(公告)日：2024-08-20

申请号：US17234659

申请日：2021-04-19

Applicant: Apple Inc.

Inventor： Ehsan Arbabi ,  Patrick R. Gill ,  Avery L. Wang

IPC: G06F3/01 ,  G01S7/521 ,  G01S15/00 ,  G01S15/42 ,  G01S15/88

CPC classification number: G06F3/013 ,  G01S7/521 ,  G01S15/003 ,  G01S15/42 ,  G01S15/88

Abstract: Ultrasonic transducers may be used to track the position of an object. For example, eyewear such as a pair of glasses or other head-mounted device may use ultrasonic transducers to track a user's eye position and gaze direction. To increase positioning accuracy over short-range distances, an array of ultrasonic transducers with different center frequencies may be formed on a common substrate. The closely spaced ultrasonic transducers with relatively small individual bandwidths may be used to simulate a single transducer with a larger bandwidth. Control circuitry may adjust the phases of the transducers in the array to steer the ultrasonic signal beam towards the user's eye and/or to receive an ultrasonic signal beam from the direction of the user's eye. The control circuitry may use time delay and/or phase delay measurement techniques to determine a distance and/or direction to the user's eye using the ultrasonic transducer arrays.