公开(公告)号：US10806378B2

公开(公告)日：2020-10-20

申请号：US16700368

申请日：2019-12-02

Applicant: PIXART IMAGING INC.

Inventor： Ren-Hau Gu ,  Chung-Wen Lo

IPC: A61B5/11 ,  A61B5/00 ,  A61B5/024

Abstract: An action recognition system is illustrated. The action recognition system has an annular body, at least one light emitting unit, at least one light sensing unit and an action recognition module. The annular body is worn on a movable part of a user. One end of the light emitting unit is exposed on an inner side of the annular body, wherein the light emitting unit emits a first light beam illuminating at least a portion of the movable part. One end of the light sensing unit is exposed on the inner side of the annular body. The light sensing unit operatively senses a second light beam reflected by the at least portion of the movable part and generates a light sensing signal. The action recognition module is configured to operatively determine an action of the user according to the light sensing signal.

公开(公告)号：US10478080B2

公开(公告)日：2019-11-19

申请号：US14955463

申请日：2015-12-01

Applicant: PIXART IMAGING INC.

Inventor： Wei-Ru Han ,  Chih-Yuan Chuang ,  Cheng-Nan Tsai ,  Ren-Hau Gu

IPC: A61B5/02 ,  A61B5/026 ,  A61B5/0295 ,  A61B5/00 ,  A61B5/024

Abstract: A physiological detection system including an array sensor and a processing unit is provided. The array sensor is configured to output array PPG signals. The processing unit is configured to construct a 3D energy distribution according to the array PPG signals to accordingly identify different microcirculation states.

公开(公告)号：US10429947B2

公开(公告)日：2019-10-01

申请号：US15673420

申请日：2017-08-10

Applicant: PixArt Imaging Inc.

Inventor： Ren-Hau Gu

IPC: G06F3/03 ,  G06F3/0354

Abstract: A method for dynamically learning a material of a working surface on which an optical navigation device is moving, includes: using light emitting unit (s) to emit light ray (s) to the surface so as to generate image(s) on an image sensor; estimating and calculating average offset(s) of image(s) of sensing pixel(s) of the image sensor according to at least one image motion information sensed by the sensing pixel(s) during a specific time; and, dynamically determining whether the image value(s) sensed by the sensing pixel (s) correspond to a fixed pattern or correspond to a feature image of the device moving on the surface according to the average offset(s) and a threshold.

公开(公告)号：US10299730B2

公开(公告)日：2019-05-28

申请号：US14728051

申请日：2015-06-02

Applicant: PIXART IMAGING INC.

Inventor： Ren-Hau Gu ,  Chih-Hsin Lin ,  Yung-Chang Lin ,  Chien-Lung Liao

IPC: A61B5/00 ,  A61B5/024 ,  A61B5/1455

Abstract: There is provided a physiological detection system including a physiological detection device and a host. The physiological detection device is configured to transmit a physiological data series to the host according to a local oscillation frequency. The host is configured to calculate a physiological value according to the physiological data series and determine a correction parameter according to a receiving data parameter and a reference data parameter, wherein the correction parameter is configured to correct the physiological value, process the physiological data series or adjust the local oscillation frequency of the physiological detection device.

公开(公告)号：US10120459B2

公开(公告)日：2018-11-06

申请号：US15800079

申请日：2017-11-01

Applicant: PixArt Imaging Inc.

Inventor： Chun-Wei Chen ,  Ren-Hau Gu

IPC: G06F3/03

Abstract: An image processing method capable of detecting noise includes adjusting a lighting unit to acquire an over-exposure image, comparing each pixel of the over-exposure image with at least one threshold value, labeling a pixel of the over-exposure image as the noise while bright intensity of the pixel is lower than the threshold value, calculating a simulating value according to bright intensity of pixels around the noise and except the noise, and utilizing the simulating value and bright intensity of other pixels except the noise to execute a displacement detecting calculation.

公开(公告)号：US10092244B2

公开(公告)日：2018-10-09

申请号：US14685782

申请日：2015-04-14

Applicant: PIXART IMAGING INC.

Inventor： Chih-Yuan Chuang ,  Cheng-Nan Tsai ,  Ming-Tsan Kao ,  Ren-Hau Gu ,  Yen-Min Chang

IPC: A61B5/024 ,  A61B5/00 ,  A61B5/1455

Abstract: A biometric detection module including a light source module, a detection region and a control module is provided. The light source module is configured to emit green light, red light and IR light in a time division manner to illuminate a skin surface. The detection region is configured to detect penetration light emitted from the light source module for illuminating the skin surface and passing through body tissues to correspondingly generate a green light signal, a red light signal and an IR light signal. The control module is configured to determine a filtering parameter according to the green light signal to accordingly filter the red light signal and the IR light signal, and calculate a biometric characteristic according to at least one of the green light signal, a filtered red light signal and a filtered IR light signal.

公开(公告)号：US09578222B2

公开(公告)日：2017-02-21

申请号：US14991350

申请日：2016-01-08

Applicant: PIXART IMAGING INC.

Inventor： Ren-Hau Gu

IPC: G06F3/03 ,  H04N5/33 ,  H04N5/225 ,  G06F1/32

CPC classification number: H04N5/2256 ,  G06F1/3259 ,  G06F3/0317 ,  G06F3/0325 ,  H04N5/332 ,  Y02D10/155

Abstract: There is provided an optical navigation device including at least one light source, an image sensor and a processing unit. The light source illuminates a work surface in a first brightness value and a second brightness value. The image sensor receives reflected light from the work surface and outputs a first image frame corresponding to the first brightness value and a second image frame corresponding to the second brightness value. The processing unit calculates a differential image of the first image frame and the second image frame and identifies an operating state according to the differential image.

Abstract translation: 提供了一种包括至少一个光源，图像传感器和处理单元的光学导航装置。 光源以第一亮度值和第二亮度值照亮工作表面。 图像传感器接收来自工作表面的反射光并输出对应于第一亮度值的第一图像帧和对应于第二亮度值的第二图像帧。 处理单元计算第一图像帧和第二图像帧的差分图像，并根据差分图像识别操作状态。

公开(公告)号：US09536128B2

公开(公告)日：2017-01-03

申请号：US14300401

申请日：2014-06-10

Applicant: PIXART IMAGING INC.

Inventor： Ren-Hau Gu ,  Yen-Min Chang

IPC: G06K9/00

CPC classification number: G06K9/0004 ,  G06K2009/0006

Abstract: There is provided a thin biometric detection module, which is advantageous in being able to detect scattered light from body tissue after the light transmitting in the body tissue without additional optical mechanism placed on the semiconductor optical detection pixel of the detection module for biometric detection.

Abstract translation: 提供了薄的生物特征检测模块，其有利的是能够在身体组织中的光透射之后检测来自身体组织的散射光，而不需要将附加的光学机构放置在用于生物特征检测的检测模块的半导体光学检测像素上。

公开(公告)号：US09229545B2

公开(公告)日：2016-01-05

申请号：US13873700

申请日：2013-04-30

Applicant: PIXART IMAGING INC.

Inventor： Yu-Hao Huang ,  Ming-Tsan Kao ,  Ren-Hau Gu ,  Hsin-Chia Chen ,  Yung-Chang Lin ,  Tsung-Fa Wang

IPC: G06F3/038 ,  G06F3/03

CPC classification number: G06F3/038 ,  G06F3/0317

Abstract: An optical navigation apparatus and an optical navigation method are provided. The optical navigation apparatus includes a light source unit, an image sensing unit, and a processing unit, wherein the processing unit is electrically connected to the light source unit and the image sensing unit. The light source unit generates a beam of light. The image sensing unit captures a plurality of images within a time interval. The processing unit determines that the beam of light is projected onto a touch object according to the images, calculates a piece of displacement information related to the touch object according to the images, generates a comparison result by comparing the piece of displacement information with a threshold, and sets a displacement resolution of the optical navigation apparatus according to the comparison result.

Abstract translation: 提供了一种光学导航装置和光学导航方法。 光学导航装置包括光源单元，图像感测单元和处理单元，其中处理单元电连接到光源单元和图像感测单元。 光源单元产生光束。 图像感测单元在时间间隔内捕获多个图像。 处理单元根据图像确定光束被投影到触摸对象上，根据图像计算与触摸对象相关的位移信息，通过将该位移信息与阈值进行比较来生成比较结果 ，并根据比较结果设定光学导航装置的位移分辨率。

公开(公告)号：US09195900B2

公开(公告)日：2015-11-24

申请号：US14629764

申请日：2015-02-24

Applicant: PIXART IMAGING INC.

Inventor： Ren-Hau Gu ,  Ming-Tsan Kao ,  Sen-Huang Huang

IPC: G06K9/00 ,  G01N33/48 ,  G06K9/46 ,  G06K9/62 ,  H04N7/18

CPC classification number: G06K9/46 ,  G06K9/00013 ,  G06K9/00604 ,  G06K9/00892 ,  G06K9/6201 ,  G06K2009/00932 ,  G06T2207/30076 ,  H04N7/18

Abstract: A system and method based on hybrid biometric detection capture first images of a user that is projected by first light of different wavelengths, extract various biometric informations from the first images, analyze and compare for each of the biometric informations to generate a matching score, determine an identity for the user according to all of the matching scores, generate second images and PPG signals from dispensed second light from the user, generate a time and PPG variation signal and a space and PPG variation signal for each frame of the second images, convert the time and PPG variation signals into frequency domain signals, determine a reference frequency according to the space and PPG variation signals, retrieve energy of the frequency domain signals at the reference frequency, and establish a three-dimensional energy distribution from the retrieved energy.

Abstract translation: 基于混合生物特征检测的系统和方法捕获由不同波长的第一光投射的用户的第一图像，从第一图像中提取各种生物信息，分析和比较每个生物信息以产生匹配分数，确定 根据所有匹配分数的用户的身份，从分配的来自用户的第二光产生第二图像和PPG信号，为第二图像的每个帧生成时间和PPG变化信号以及空间和PPG变化信号，转换 将时间和PPG变化信号转换为频域信号，根据空间和PPG变化信号确定参考频率，检索参考频率下的频域信号的能量，并从检索到的能量建立三维能量分布。