公开(公告)号：US12106649B2

公开(公告)日：2024-10-01

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: G08B17/10 ,  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.

公开(公告)号：US11854361B2

公开(公告)日：2023-12-26

申请号：US18111605

申请日：2023-02-20

Applicant: PixArt Imaging Inc.

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

IPC: G08B17/10 ,  G08B17/107

CPC classification number: G08B17/107

Abstract: There is provided a smoke detector including a light source, a reflective surface, a light sensor and a processor. The light sensor receives reflected light when the light source emits light toward the reflective surface, and generates a reference detection signal when there is no smoke. The processor receives the detection signal from the light sensor, and automatically selects a set of predetermined condition thresholds according to a profile of the detection signal to be compared with the detection signal thereby determining whether to generate an alarm according to the comparison result.

公开(公告)号：US12046114B2

公开(公告)日：2024-07-23

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: G08B17/10 ,  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.

公开(公告)号：US11615684B2

公开(公告)日：2023-03-28

申请号：US17320222

申请日：2021-05-14

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 light source, a reflective surface, a light sensor and a processor. The light sensor receives reflected light when the light source emits light toward the reflective surface, and generates a reference detection signal when there is no smoke. The processor receives the detection signal from the light sensor, and automatically selects a set of predetermined condition thresholds according to a profile of the detection signal to be compared with the detection signal thereby determining whether to generate an alarm according to the comparison result.

公开(公告)号：US20250022357A1

公开(公告)日：2025-01-16

申请号：US18221377

申请日：2023-07-12

Applicant: PixArt Imaging Inc.

Inventor： Ching-Kun Chen ,  Guo-Zhen Wang

IPC: G08B17/107 ,  G01N21/47

Abstract: A smoke detector comprises a light source, an optical sensor, a first, and a second processing circuit. The optical sensor senses optical data and comprises; a first oscillator, generating a first oscillating signal; and a second oscillator, generating a second oscillating signal. The first processing circuit generates a first command to instruct the first oscillator to oscillate for a first expected oscillating time, and acquires a first real oscillating time, wherein the first processing circuit further computes a time relation between the first expected oscillating time and the first real oscillating time. The first processing circuit generates a second command to instruct the second oscillator to oscillate for a second expected oscillating time according to the time relation. The second processing circuit controls the smoke detector to generate a first alarm according to the time relation. The optical sensor can also be applied to other electronic devices.

公开(公告)号：US11990024B2

公开(公告)日：2024-05-21

申请号：US17878063

申请日：2022-08-01

Applicant: PIXART IMAGING INC.

Inventor： Ching-Kun Chen ,  Guo-Zhen Wang

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

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：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.