公开(公告)号：US09761199B2

公开(公告)日：2017-09-12

申请号：US14515936

申请日：2014-10-16

Applicant: PixArt Imaging Inc.

Inventor： Yu-Ju Lee

IPC: G01C21/00 ,  G09G5/08 ,  G06F1/32 ,  G06F3/03

CPC classification number: G09G5/08 ,  G06F1/3259 ,  G06F3/0317 ,  G09G2360/144 ,  Y02D10/155

Abstract: There is provided an optical navigation system including a light source, a first photosensitive unit, a second photosensitive unit, a control unit and a processing unit. The light source is configured to emit light of a predetermined wavelength. The first photosensitive unit is configured to receive reflected light of the predetermined wavelength reflected by a working surface. The second photosensitive unit is covered with a coating to block light of the predetermined wavelength. The control unit is configured to control the light source, the first photosensitive unit and the second photosensitive unit to expose both the first photosensitive unit and the second photosensitive unit when the light source is turned on. The processing unit is configured to read first image data and second image data respectively from the first photosensitive unit and the second photosensitive unit thereby identifying an ambient light mode or a liftoff mode.

公开(公告)号：US12014567B1

公开(公告)日：2024-06-18

申请号：US18318723

申请日：2023-05-17

Applicant: PIXART IMAGING INC.

Inventor： Yu-Ju Lee ,  Tzung-Min Su

IPC: G06V40/13 ,  G06V40/12 ,  H04N23/71 ,  H04N23/72 ,  H04N23/73 ,  H04N23/74 ,  H04N25/50 ,  G06V40/10

CPC classification number: G06V40/13 ,  G06V40/1353 ,  H04N23/71 ,  H04N23/72 ,  H04N23/73 ,  H04N23/74 ,  H04N25/50 ,  G06V40/15

Abstract: There is provided a finger detection device including a light source, a light sensor and a processor. The light sensor respectively captures a first image frame and a second image frame corresponding to turning on and turning off the light source. The processor calculates a differential image frame of the first image frame and the second image frame, determines a covered region in the differential image frame and identifies whether the covered region is a finger region or not. If the covered region is not the finger region, the processor controls the light sensor to acquire new image frames. If the covered region is the finger region, the processor determines different windows of interest in the finger region.

公开(公告)号：US09274617B2

公开(公告)日：2016-03-01

申请号：US14067632

申请日：2013-10-30

Applicant: PIXART IMAGING INC.

Inventor： Yu-Ju Lee ,  Tzu-Yu Chen

IPC: G06F3/033 ,  G06F3/0354 ,  G06F3/03 ,  G06T7/20

CPC classification number: G06F3/03543 ,  G06F3/0317 ,  G06T7/223 ,  G06T2207/20008 ,  G06T2207/30168

Abstract: An optical navigation apparatus, an optical navigation method, and a non-transitory computer readable medium thereof are provided. The optical navigation apparatus includes a light source unit, an image sensing unit, and a processing unit. The processing unit is electrically connected to the light source unit and the image sensing unit. The light source unit provides a beam of light. The image sensing unit captures a first image at a first time instant when the light is projected onto a reflection surface. The processing unit calculates an image quality index of the first image and determines a matching block size between the first image and a second image according to the image quality index.

Abstract translation: 提供了一种光学导航装置，光学导航方法及其非暂时计算机可读介质。 光学导航装置包括光源单元，图像感测单元和处理单元。 处理单元电连接到光源单元和图像感测单元。 光源单元提供光束。 当光投射到反射表面上时，图像感测单元在第一时刻捕获第一图像。 处理单元计算第一图像的图像质量指数，并根据图像质量指数确定第一图像和第二图像之间的匹配块大小。