公开(公告)号：US20240404384A1

公开(公告)日：2024-12-05

申请号：US18801885

申请日：2024-08-13

Applicant: PixArt Imaging Inc.

Inventor： CHENG-NAN TSAI ,  GUO-ZHEN WANG ,  CHING-KUN CHEN ,  YEN-CHANG CHU ,  CHIH-MING SUN

IPC: G08B17/107

Abstract: There is provided a smoke detector including a first light source, a second light source surface, a light sensor and a processor. The light sensor receives reflected light when the first light source and the second light source emit light, and generates a first detection signal corresponding to light emission of the first light source and a second detection signal corresponding to light emission of the second light source. The processor distinguishes smoke and floating particles according to a similarity between the first detection signal and the second detection signal.

公开(公告)号：US20240257632A1

公开(公告)日：2024-08-01

申请号：US18632330

申请日：2024-04-11

Applicant: PixArt Imaging Inc.

Inventor： CHING-KUN CHEN ,  GUO-ZHEN WANG

IPC: G08B29/20 ,  G08B17/103 ,  G08B25/00 ,  G08B29/18

CPC classification number: G08B29/20 ,  G08B17/103 ,  G08B29/185 ,  G08B25/008

Abstract: There is provided a fire alarm device including multiple light sources, a light sensor, a first processor and a second processor. In a standby mode, the first processor identifies whether to wake up the second processor according to a detection result of the light sensor obtained by detecting emission light of one of the multiple light sources. The second processor identifies whether to generate an alarm according to a detection result of the light sensor obtained by detecting emission light of the multiple light sources. The fire alarm device further includes a thermal sensor for providing detected temperature values to the first processor and/or the second processor to perform the identifying procedure.

公开(公告)号：US20240078887A1

公开(公告)日：2024-03-07

申请号：US18509350

申请日：2023-11-15

Applicant: PIXART IMAGING INC.

Inventor： CHENG-NAN TSAI ,  GUO-ZHEN WANG ,  CHING-KUN CHEN ,  YEN-CHANG CHU ,  CHIH-MING SUN

IPC: G08B17/107

CPC classification number: G08B17/107

Abstract: There is provided a smoke detector including a first light source, a second light source surface, a light sensor and a processor. The light sensor receives reflected light when the first light source and the second light source emit light, and generates a first detection signal corresponding to light emission of the first light source and a second detection signal corresponding to light emission of the second light source. The processor distinguishes smoke and floating particles according to a similarity between the first detection signal and the second detection signal.