公开(公告)号：US12253782B2

公开(公告)日：2025-03-18

申请号：US18337865

申请日：2023-06-20

Applicant: e-Vision Smart Optics, Inc.

Inventor： Anthony Van Heugten ,  Anita Trajkovska-Broach ,  Harry Milton

IPC: G02F1/137 ,  G02F1/13 ,  G02F1/1335 ,  G06T19/00

Abstract: Bright ambient light can wash out a virtual image in a conventional augmented reality device. Fortunately, this problem can be prevented with a variable electro-active beam splitter whose reflect/transmit ratio can be varied or switched on and off rapidly at a duty cycle based on the ambient level. As the ambient light gets brighter, the beam splitter's transmit/reflect ratio can be shifted so that the beam splitter reflects more light from the display and transmits less ambient light to the user's eye. The beam splitter can also be switched between a highly reflective state and a highly transmissive state at a duty cycle selected so that the eye spends more time integrating reflected display light than integrating transmitted ambient light. The splitting ratio and/or duty cycle can be adjusted as the ambient light level changes to provide the optimum experience for the user.

公开(公告)号：US20240061300A1

公开(公告)日：2024-02-22

申请号：US18337865

申请日：2023-06-20

Applicant: e-Vision Smart Optics, Inc.

Inventor： Anthony Van Heugten ,  Anita Trajkovska-Broach ,  Harry Milton

IPC: G02F1/137 ,  G02F1/1335 ,  G02F1/13 ,  G06T19/00

CPC classification number: G02F1/13718 ,  G02F1/13355 ,  G02F1/1306 ,  G06T19/006

Abstract: Bright ambient light can wash out a virtual image in a conventional augmented reality device. Fortunately, this problem can be prevented with a variable electro-active beam splitter whose reflect/transmit ratio can be varied or switched on and off rapidly at a duty cycle based on the ambient level. As the ambient light gets brighter, the beam splitter's transmit/reflect ratio can be shifted so that the beam splitter reflects more light from the display and transmits less ambient light to the user's eye. The beam splitter can also be switched between a highly reflective state and a highly transmissive state at a duty cycle selected so that the eye spends more time integrating reflected display light than integrating transmitted ambient light. The splitting ratio and/or duty cycle can be adjusted as the ambient light level changes to provide the optimum experience for the user.

公开(公告)号：US11681193B2

公开(公告)日：2023-06-20

申请号：US17225733

申请日：2021-04-08

Applicant: e-Vision Smart Optics, Inc.

Inventor： Anthony Van Heugten ,  Anita Trajkovska-Broach ,  Harry Milton

IPC: G02F1/1335 ,  G02F1/137 ,  G02F1/13 ,  G06T19/00

CPC classification number: G02F1/13718 ,  G02F1/1306 ,  G02F1/13355 ,  G06T19/006

Abstract: Bright ambient light can wash out a virtual image in a conventional augmented reality device. Fortunately, this problem can be prevented with a variable electro-active beam splitter whose reflect/transmit ratio can be varied or switched on and off rapidly at a duty cycle based on the ambient level. As the ambient light gets brighter, the beam splitter's transmit/reflect ratio can be shifted so that the beam splitter reflects more light from the display and transmits less ambient light to the user's eye. The beam splitter can also be switched between a highly reflective state and a highly transmissive state at a duty cycle selected so that the eye spends more time integrating reflected display light than integrating transmitted ambient light. The splitting ratio and/or duty cycle can be adjusted as the ambient light level changes to provide the optimum experience for the user.

公开(公告)号：US20210223601A1

公开(公告)日：2021-07-22

申请号：US17225733

申请日：2021-04-08

Applicant: e-Vision Smart Optics, Inc.

Inventor： Anthony Van Heugten ,  Anita Trajkovska-Broach ,  Harry Milton

IPC: G02F1/137 ,  G02F1/1335 ,  G02F1/13 ,  G06T19/00

Abstract: Bright ambient light can wash out a virtual image in a conventional augmented reality device. Fortunately, this problem can be prevented with a variable electro-active beam splitter whose reflect/transmit ratio can be varied or switched on and off rapidly at a duty cycle based on the ambient level. As the ambient light gets brighter, the beam splitter's transmit/reflect ratio can be shifted so that the beam splitter reflects more light from the display and transmits less ambient light to the user's eye. The beam splitter can also be switched between a highly reflective state and a highly transmissive state at a duty cycle selected so that the eye spends more time integrating reflected display light than integrating transmitted ambient light. The splitting ratio and/or duty cycle can be adjusted as the ambient light level changes to provide the optimum experience for the user.