公开(公告)号：US20240382159A1

公开(公告)日：2024-11-21

申请号：US18787350

申请日：2024-07-29

Applicant: PixArt Imaging Inc.

Inventor： REN-HAU GU ,  Chih-Hsin Lin

IPC: A61B5/00 ,  A61B5/024 ,  A61B5/0245 ,  A61B5/25

Abstract: There is provided a physiological detection device including a white light source, a molding and a pixel array. The white light source is configured to emit white light having a color temperature between 2800K and 3200K. The molding is formed upon the white light source and configured to constrain an emission angle of the white light between 60 and 80 degrees. The pixel array is covered by a filter layer having a passband between 570 nm and 620 nm configured to filter the white light.

公开(公告)号：US11224384B2

公开(公告)日：2022-01-18

申请号：US16177433

申请日：2018-11-01

Applicant: PixArt Imaging Inc.

Inventor： Ren-Hau Gu ,  Chih-Hsin Lin

IPC: A61B5/00 ,  A61B5/024 ,  A61B5/0245 ,  A61B5/25

Abstract: There is provided a heart rate detection device including a sensing unit for sensing emergent light from subcutaneous tissues illuminated by a single light source of multiple light colors to output multiple light detection signals associated with multiple wavelengths. The heart rate detection device further includes a processor uses the multiple light detection signals associated with the multiple wavelengths to cancel motion artifact to obtain a clean heart rate signal.

公开(公告)号：US20200233210A1

公开(公告)日：2020-07-23

申请号：US16840477

申请日：2020-04-06

Applicant: PixArt Imaging Inc.

Inventor： Ren-Hau Gu ,  Chih-Hsin Lin

IPC: G02B27/00 ,  A61B5/1455 ,  A61B5/00 ,  A61B5/024

Abstract: A light sensing method, applied to a light sensing system comprising a light sensor and at least one light source. The light sensor comprises a plurality of light sensing units. The light sensing method comprises: controlling the light sensor to capture images according to the light source; generating an exposure condition according brightness that each of the light sensing units senses, to control all the light sensing units to generate a target brightness distribution according to the exposure condition; and controlling the light sensing units to sense light from the light source according to the exposure condition. The light sensing system can have a better SNR via adjusting the exposure condition for each one of the light sensing units. Such light sensing method can be applied to compute physiological parameters.

公开(公告)号：US10478128B2

公开(公告)日：2019-11-19

申请号：US15819592

申请日：2017-11-21

Applicant: PixArt Imaging Inc.

Inventor： Ren-Hau Gu ,  Yen-Min Chang ,  Ming-Chang Li ,  Chih-Hsin Lin

IPC: A61B5/00 ,  A61B5/024 ,  G16H50/30 ,  G16H40/63

Abstract: There is provided a system architecture including a PPG hardware module and a MEMS hardware module. The PPG hardware module processes PPG raw data, which is generally composed of analog signals or digital signals. The PPG hardware module filters the raw data for later digital calculation to, for example, find out frequency signals with higher peak values. The PPG hardware module then outputs the selected frequency signals to an MCU for heart rate calculation. The MEMS hardware module receives MEMS raw data from a motion detector made of MEMS elements. The MEMS raw data represents motion status of a user that could possibly affect the heart rate determination result. The MEMS hardware module filters the raw data for later digital calculation to find out frequency signals with higher peak values caused by motion.

公开(公告)号：US09799107B2

公开(公告)日：2017-10-24

申请号：US14300192

申请日：2014-06-09

Applicant: PixArt Imaging Inc.

Inventor： Yu-Chia Lin ,  Yu-Hsiang Huang ,  Chih-Hsin Lin

IPC: G06T5/00 ,  G01S5/16 ,  H04N5/232 ,  G06F3/041 ,  G06F3/042 ,  H04N5/235 ,  H04N5/243

CPC classification number: G06T5/007 ,  G01S5/16 ,  G06F3/0418 ,  G06F3/042 ,  H04N5/23216 ,  H04N5/2351 ,  H04N5/243

Abstract: An image brightness information adjusting method, which comprises: computing background brightness information of an image; computing a first brightness information difference between brightness information for at least one pixel of a first image line of the image and background brightness information corresponding to the first image line; and adjusting brightness information for at least one pixel of a second image line according to the first brightness information difference.

公开(公告)号：US09389731B2

公开(公告)日：2016-07-12

申请号：US13657969

申请日：2012-10-23

Applicant: PixArt Imaging Inc.

Inventor： Tzung-Min Su ,  Chih-Hsin Lin ,  Yi-Hsien Ko ,  Ming-Tsan Kao

IPC: G06F3/042

CPC classification number: G06F3/0421

Abstract: There is provided an optical touch system including at least one lighting unit, at least one image sensing module and a processing unit. The image sensing module is configured to capture light of a pointer and the lighting unit to generate a two-dimensional image and to convert entire of the two-dimensional image to a one-dimensional feature. The processing unit positions the pointer according to the one-dimensional feature.

Abstract translation: 提供了一种光学触摸系统，其包括至少一个照明单元，至少一个图像感测模块和处理单元。 图像感测模块被配置为捕获指针和照明单元的光以生成二维图像并将整个二维图像转换为一维特征。 处理单元根据一维特征定位指针。

公开(公告)号：US09354749B2

公开(公告)日：2016-05-31

申请号：US14052481

申请日：2013-10-11

Applicant: PixArt Imaging Inc.

Inventor： Cheng-Nan Tsai ,  Tzung-Min Su ,  Chih-Hsin Lin ,  Yaun-Yu Peng ,  Yu-Chia Lin ,  Chuan-Ching Lin ,  Teng Wei Hsu

IPC: G06F3/042

CPC classification number: G06F3/042

Abstract: There is provided an optical touch system including a touch surface, a plurality of image sensors and a plurality or compensation light sources, wherein each of the image sensors is adjacent to one of the compensation light sources. When one of the image sensors is capturing an image frame, the compensation light source not adjacent to and within a field of view of the image sensor which is capturing the image frame irradiates so as to compensate a brightness distribution of the image frame.

Abstract translation: 提供了一种包括触摸表面，多个图像传感器和多个或补偿光源的光学触摸系统，其中每个图像传感器与补偿光源中的一个相邻。 当其中一个图像传感器正在拍摄图像帧时，不相邻并且在拍摄图像帧的图像传感器的视场内的补偿光源被照射以补偿图像帧的亮度分布。