公开(公告)号：US11761830B2

公开(公告)日：2023-09-19

申请号：US17235664

申请日：2021-04-20

Applicant: PixArt Imaging Inc.

Inventor： Yen-Po Chen ,  Hao-Che Liu ,  Yen-Chang Chu ,  Chih-Ming Sun

IPC: G01L1/00 ,  G01L1/14 ,  H05K1/11 ,  H05K1/03

CPC classification number: G01L1/144 ,  H05K1/0393 ,  H05K1/118 ,  H05K2201/10151

Abstract: There is provided a force sensor including a substrate and a polymer material layer. The substrate has a circuit layout that includes a first electrode and a second electrode configured to form a capacitor therebetween. The polymer material layer covers at least on a space between the first electrode and the second electrode, and is used to change capacitance of the capacitor while being pressed. The force sensor is arranged inside a stem of an earphone for detecting the user input.

公开(公告)号：US12188865B2

公开(公告)日：2025-01-07

申请号：US17722132

申请日：2022-04-15

Applicant: PIXART IMAGING INC.

Inventor： Cheng-Nan Tsai ,  Yen-Chang Chu ,  Chih-Ming Sun ,  Chi-Chih Shen ,  Kuo-Hsiung Li

IPC: G01N21/47 ,  G01N33/00 ,  G08B17/107 ,  G01N21/53

Abstract: There is provided an optical machine of a smoke detector including a substrate, a light source, a light sensor and a light blocking member. The light source and the light sensor are arranged on the substrate in a first direction. The light blocking member is arranged upon the light source and blocks a part of an emission angle of the light source in the first direction far away from the light sensor.

公开(公告)号：US11913864B2

公开(公告)日：2024-02-27

申请号：US17740392

申请日：2022-05-10

Applicant: PixArt Imaging Inc.

Inventor： Yen-Chang Chu ,  Cheng-Nan Tsai ,  Chih-Ming Sun

IPC: G01N15/06 ,  G08B17/107 ,  G08B29/18 ,  G01N15/00

CPC classification number: G01N15/06 ,  G08B17/107 ,  G08B29/18 ,  G01N2015/0046 ,  G01N2015/0693

Abstract: There is provided a smoke detector including a substrate, a light source and a light sensor. The light source and the light sensor are arranged adjacently on the substrate. The substrate is arranged with an asymmetric structure to cause an illumination region of the light source to deviate toward the light sensor thereby increasing a ratio of light intensity reflected by smoke with respect to reference light intensity.

公开(公告)号：US20230252871A1

公开(公告)日：2023-08-10

申请号：US17741459

申请日：2022-05-11

Applicant: PixArt Imaging Inc.

Inventor： Yen-Chang Chu ,  Yen-Po Chen ,  Chih-Ming Sun ,  Cheng-Nan Tsai ,  Ching-Kun Chen

IPC: G08B17/107

CPC classification number: G08B17/107

Abstract: A smoke detection device includes a housing, a smoke collector, an optical detector and a cover plate. The housing has a piercing hole. The smoker collector has a smoke hole, and position of the smoke hole is close to position of the piercing hole. The optical detector is disposed inside the smoke collector and adapted to detect gaseous concentration inside the smoke collector. The cover plate is disposed between the housing and the smoke collector, and used to set a channel from the piercing hole to the smoke hole, so that gaseous matter flows from outside the smoke detection device into the smoke collector through the piercing hole and the smoke hole.