Amazon Technologies, Inc.

Haiwei Chen

Seokchan Hong

Chulwoo Oh

Suchit Shah

Kibyung Seong

Bo Qu

Robert Arthur Sprague

Jim Weijian Li

A method includes receiving a light beam propagating along an optical path and operating a polarization rotator in a first state to produce an input right-hand circularly polarized beam or in a second state to produce an input left-hand circularly polarized beam. The method also includes converting, using a first diffractive element, the input right-hand circularly polarized beam into an intermediate left-hand circularly polarized beam or converting, using the first diffractive element, the input left-hand circularly polarized beam into an intermediate right-hand circularly polarized beam. The method also includes converting, using a second diffractive element, the intermediate left-hand circularly polarized beam into a right-hand circularly polarized output beam or converting, using the second diffractive element, the intermediate right-hand circularly polarized beam into a left-hand circularly polarized output beam.

Method and system for eyebox expansion in display systems

A method includes receiving a light beam propagating along an optical path, converting, using a first diffractive element, a first portion of the light beam into a first circularly polarized beam, and a second portion of the light beam into a second circularly polarized beam. The method also includes converting, using a second diffractive element, the first circularly polarized beam into a first circularly polarized output beam, and the second circularly polarized beam into a second circularly polarized output beam.

An optical system includes a first set of electrodes arranged in a concentric pattern and a liquid crystal material in electrical communication with the first set of electrodes. The optical system also includes a second set of electrodes arranged in a two-dimensional pattern and in electrical communication with the liquid crystal material.

Tunable liquid crystal lens with electrically tunable axis of astigmatism

Systems, methods, and computer-readable media are disclosed for reflective liquid crystal displays with quantum dot color filter arrays. In one embodiment, an example reflective display structure may include a quantum dot color filter array, a first substrate, a second substrate, a reflective liquid crystal layer disposed between the first substrate and the second substrate, wherein the quantum dot color filter array is disposed on a first side of the reflective liquid crystal layer, a light guide disposed on a second side of the reflective liquid crystal layer, and a light emitting diode optically coupled to the light guide.

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Santa Clara, CA, United States of America

Haiwei Chen