公开(公告)号：US11553163B1

公开(公告)日：2023-01-10

申请号：US17241693

申请日：2021-04-27

Applicant: Amazon Technologies, Inc.

Inventor： Haiwei Chen ,  Chulwoo Oh ,  Kibyung Seong ,  Seokchan Hong ,  Suchit Shah ,  Bo Qu

IPC: H04N9/31 ,  G02B27/01 ,  G02B27/28

Abstract: 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.

公开(公告)号：US10732460B1

公开(公告)日：2020-08-04

申请号：US16165967

申请日：2018-10-19

Applicant: Amazon Technologies, Inc.

Inventor： Haiwei Chen ,  Seokchan Hong

IPC: G02F1/1335 ,  G02F1/13357 ,  G02F1/1333 ,  G02F1/137 ,  G06F3/044

Abstract: 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.

公开(公告)号：US11442332B1

公开(公告)日：2022-09-13

申请号：US17080304

申请日：2020-10-26

Applicant: Amazon Technologies, inc.

Inventor： Robert Arthur Sprague ,  Jim Weijian Li ,  Haiwei Chen

IPC: G02F1/29 ,  G02C7/08

Abstract: 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.

公开(公告)号：US12177611B1

公开(公告)日：2024-12-24

申请号：US18218508

申请日：2023-07-05

Applicant: Amazon Technologies, Inc.

Inventor： Haiwei Chen ,  Chulwoo Oh ,  Kibyung Seong ,  Seokchan Hong ,  Suchit Shah ,  Bo Qu

IPC: H04N9/31 ,  G02B27/01 ,  G02B27/28

Abstract: 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.

公开(公告)号：US11750780B1

公开(公告)日：2023-09-05

申请号：US17973693

申请日：2022-10-26

Applicant: Amazon Technologies, Inc.

Inventor： Haiwei Chen ,  Chulwoo Oh ,  Kibyung Seong ,  Seokchan Hong ,  Suchit Shah ,  Bo Qu

IPC: H04N9/31 ,  G02B27/01 ,  G02B27/28

CPC classification number: H04N9/3152 ,  G02B27/0172 ,  H04N9/3161 ,  G02B27/28

Abstract: 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.