公开(公告)号：US20230206743A1

公开(公告)日：2023-06-29

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: G08B17/107

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：US20220165141A1

公开(公告)日：2022-05-26

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：US20180084190A1

公开(公告)日：2018-03-22

申请号：US15821891

申请日：2017-11-24

Applicant: PIXART IMAGING INC.

Inventor： Han-Chang LIN ,  Guo-Zhen WANG ,  Nien-Tse CHEN

IPC: H04N5/232 ,  G02B27/00 ,  G06K9/00 ,  G06F3/01

CPC classification number: H04N5/23219 ,  G02B27/0093 ,  G06F3/013 ,  G06K9/00228 ,  G06K9/00597 ,  H04N5/23293

Abstract: An electronic system including a display device, an image sensor, a face detection engine, an eye detection engine and an eye protection engine is provided. The image sensor captures an image. The face detection engine recognizes a user face in the image. The eye detection engine recognizes user eyes in the image. The eye protection engine turns off the display device when the user eyes are recognized in the image but the user face is not recognized in the image.

公开(公告)号：US20170363723A1

公开(公告)日：2017-12-21

申请号：US15359911

申请日：2016-11-23

Applicant: PIXART IMAGING INC.

Inventor： Guo-Zhen WANG

IPC: G01S7/497 ,  G01S17/08

CPC classification number: G01B11/14 ,  G01B3/30 ,  G01B11/026 ,  G01B11/2504 ,  G01B21/042

Abstract: An optical calibration system including a calibration module, a light source, an optical sensing device and a calculation module is provided. The calibration module includes a calibration plane and a plurality of calibration structures between the calibration plane and the light source, wherein the calibration structures are disposed at predetermined calibration positions. The light source projects a linear light section toward the calibration module. The optical sensing device senses reflected light from the calibration plane and the calibration structures reflecting the linear light section to generate a sensed frame. The calculation module calculates positions of gravity centers of a plurality of calibration points in the sensed frame corresponding to the calibration structures.

公开(公告)号：US20160232679A1

公开(公告)日：2016-08-11

申请号：US14935960

申请日：2015-11-09

Applicant: PIXART IMAGING INC.

Inventor： Guo-Zhen WANG ,  Chia-Yi LIU

IPC: G06T7/00 ,  H04N5/235 ,  H04N5/225

CPC classification number: G06T7/55 ,  G01C3/00 ,  G01S17/46 ,  G01S17/89 ,  G06T2207/10144

Abstract: There is provided an operating method of a distance measurement system including the steps of successively capturing image frames with an image sensor; controlling a sampling parameter to converge an average brightness value of an object image in the image frames to be within a predetermined range; calculating a plurality of first object sizes of a converged object image in a converged image frame and calculating a first average value of the first object sizes; calculating a second average value of the first average values corresponding to a plurality of converged image frames; and comparing the second average value with a lookup table to determine an object depth.

Abstract translation: 提供了一种距离测量系统的操作方法，包括以下步骤：用图像传感器连续拍摄图像帧; 控制采样参数以将图像帧中的对象图像的平均亮度值收敛在预定范围内; 计算会聚图像帧中的会聚对象图像的多个第一对象尺寸并计算第一对象尺寸的第一平均值; 计算对应于多个聚焦图像帧的第一平均值的第二平均值; 以及将所述第二平均值与查找表进行比较以确定对象深度。