公开(公告)号：US20220252457A1

公开(公告)日：2022-08-11

申请号：US17620619

申请日：2020-06-19

Applicant: The Texas A&M University System

Inventor： Ya Wang ,  Libo Wu ,  Zhangjie Chen

IPC: G01J5/0804 ,  G01J5/0875 ,  G01J5/00

Abstract: A passive infrared (PIR) sensor system, includes a PIR sensor configured to produce an output signal in response to receiving infrared (IR) radiation, an electronic shutter positionable in a field of view (FOV) of the PIR sensor, wherein the electronic shutter includes a liquid crystal (LC) material, wherein the electronic shutter includes a first state providing a first transmissivity of IR radiation through the electronic shutter and a second state providing a second transmissivity of IR radiation through the electronic shutter that is less than the first transmissivity, and a shutter actuator configured to apply an actuation signal to the electronic shutter to actuate the electronic shutter between the first state and the second state.

公开(公告)号：US20250093207A1

公开(公告)日：2025-03-20

申请号：US18970547

申请日：2024-12-05

Applicant: The Texas A&M University System

Inventor： Ya Wang ,  Libo Wu ,  Zhangjie Chen

IPC: G01J5/0804 ,  G01J5/00 ,  G01J5/02 ,  G01J5/04 ,  G01J5/06 ,  G01J5/0805 ,  G01J5/0831 ,  G01J5/0875 ,  G01J5/34

Abstract: A passive infrared (PIR) sensor system, includes a PIR sensor configured to produce an output signal in response to receiving infrared (IR) radiation, an electronic shutter positionable in a field of view (FOV) of the PIR sensor, wherein the electronic shutter includes a liquid crystal (LC) material, wherein the electronic shutter includes a first state providing a first transmissivity of IR radiation through the electronic shutter and a second state providing a second transmissivity of IR radiation through the electronic shutter that is less than the first transmissivity, and a shutter actuator configured to apply an actuation signal to the electronic shutter to actuate the electronic shutter between the first state and the second state.

公开(公告)号：US12196618B2

公开(公告)日：2025-01-14

申请号：US17620619

申请日：2020-06-19

Applicant: The Texas A&M University System

Inventor： Ya Wang ,  Libo Wu ,  Zhangjie Chen

IPC: G01J5/08 ,  G01J5/00 ,  G01J5/02 ,  G01J5/04 ,  G01J5/06 ,  G01J5/0804 ,  G01J5/0805 ,  G01J5/0831 ,  G01J5/0875 ,  G01J5/34

Abstract: A passive infrared (PIR) sensor system, includes a PIR sensor configured to produce an output signal in response to receiving infrared (IR) radiation, an electronic shutter positionable in a field of view (FOV) of the PIR sensor, wherein the electronic shutter includes a liquid crystal (LC) material, wherein the electronic shutter includes a first state providing a first transmissivity of IR radiation through the electronic shutter and a second state providing a second transmissivity of IR radiation through the electronic shutter that is less than the first transmissivity, and a shutter actuator configured to apply an actuation signal to the electronic shutter to actuate the electronic shutter between the first state and the second state.