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1. 发明授权

US10121255B2 Optical sensor for odometry tracking to determine trajectory of a wheel 有权
公开(公告)号：US10121255B2
公开(公告)日：2018-11-06
申请号：US14930668
申请日：2015-11-03
申请人： PixArt Imaging (Penang) SDN. BHD.
发明人： Keen-Hun Leong , Boon-How Kok , Dennis Dominic Donald
IPC分类号： G06K9/00 , G06T7/20 , H04N5/247 , B60W30/00 , G06F3/0362 , B62D15/02 , G01C21/26
摘要： An optical sensor system for determining trajectory of a wheel includes: a wheel mounted in a wheel arch having an outer surface covered with evenly-spaced wheel treads; a plurality of optical sensors mounted in the wheel arch but not touching the wheel, for performing a plurality of counts corresponding to respectively capturing a plurality of images of the wheel according to the wheel treads; and a plurality of clear casings respectively mounted in the wheel arch between the wheel and the plurality of optical sensors, but not touching the wheel. The captured images are compared with a reference image to determine a 2D displacement and a calculation is further performed to convert the measured 2D displacement of the wheel from its original position into a distance the wheel travels along a path in order to determine the wheel trajectory.

2. 发明授权

US10089741B2 Edge detection with shutter adaption 有权
公开(公告)号：US10089741B2
公开(公告)日：2018-10-02
申请号：US15250943
申请日：2016-08-30
申请人： PixArt Imaging (Penang) SDN. BHD.
发明人： Siew Chin Lee
IPC分类号： H04N7/18 , G06K9/40 , G06T7/00 , G06T7/60
摘要： A method for determining leading edge location in an image captured by an optical navigation sensor with auto shutter adaptation includes: plotting average pixel values per sensor column on a graph; determining an average value according to the average pixel values as a threshold value; defining a weighted location in the leading half of the captured image according to the threshold value; and determining the leading edge location according to the defined weighted location.

3. 发明授权

US10057526B2 Pixel circuit with low power consumption, image system including the same and operating method thereof 有权
公开(公告)号：US10057526B2
公开(公告)日：2018-08-21
申请号：US14940369
申请日：2015-11-13
申请人： PIXART IMAGING (PENANG) SDN. BHD.
发明人： Kwai-Lee Pang , Swee-Lin Thor
IPC分类号： H04N5/3745 , H04N5/353 , H04N5/378 , G06F3/01 , H04N5/235 , H04N5/355
CPC分类号： H04N5/378 , G06F3/01 , H01L27/14681 , H04N5/2353 , H04N5/35536
摘要： A pixel circuit including a photodiode, a first storage capacitor and a second storage capacitor is provided. The first storage capacitor discharges to a first output voltage in a first exposure time and to a third output voltage in a third exposure time. The second storage capacitor discharges to a second output voltage in a second exposure time and to a fourth output voltage in a fourth exposure time. The first and second exposure times are included in a first frame period. The third and fourth exposure times are included in a second frame period. The second frame period is a next frame period of the first frame period. In the first frame period, the first exposure time is subsequent to the second exposure time. In the second frame period, the third exposure time is prior to the fourth exposure time.

4. 发明授权

US10042434B2 LED current ramping method for optical mouse 有权
公开(公告)号：US10042434B2
公开(公告)日：2018-08-07
申请号：US15382750
申请日：2016-12-19
申请人： PixArt Imaging (Penang) SDN. BHD.
发明人： Kwai Lee Pang
IPC分类号： G09G5/00 , G06F3/03 , G09G3/32 , G06F1/32
CPC分类号： G06F1/3259 , G06F3/0317 , G06F3/0383 , G09G3/32 , G09G2310/066
摘要： An LED current ramping method for an optical mouse includes: determining a speed of the optical mouse; setting control bits according to the determined speed; sending the control bits to a digital circuit of the mouse; and decoding the control bits to selectively open and close switches in a constant current LED driver of the mouse to adjust a current according to the speed.

5. 发明申请

US20180173324A1 LED CURRENT RAMPING METHOD FOR OPTICAL MOUSE 审中-公开
公开(公告)号：US20180173324A1
公开(公告)日：2018-06-21
申请号：US15382750
申请日：2016-12-19
申请人： PixArt Imaging (Penang) SDN. BHD.
发明人： Kwai Lee PANG
IPC分类号： G06F3/03 , G09G3/32 , G06F1/32
CPC分类号： G06F3/0312 , G06F1/3259 , G09G3/32 , G09G2310/066
摘要： An LED current ramping method for an optical mouse includes: determining a speed of the optical mouse; setting control bits according to the determined speed; sending the control bits to a digital circuit of the mouse; and decoding the control bits to selectively open and close switches in a constant current LED driver of the mouse to adjust a current according to the speed.

6. 发明申请

US20180062630A1 VOLTAGE COMPARING CIRCUIT AND VOLTAGE COMPARING METHOD 审中-公开
公开(公告)号：US20180062630A1
公开(公告)日：2018-03-01
申请号：US15250950
申请日：2016-08-30
申请人： PixArt Imaging (Penang) SDN. BHD.
发明人： Wooi Kip LIM , Yong Yeap Tan
IPC分类号： H03K5/24 , G01K7/34
CPC分类号： H03K5/24 , G01K7/34 , G01K15/005
摘要： A voltage comparing circuit comprising: a comparator,; a time interval computing unit; a switch module,; a first current source, comprising a first charging terminal; a first capacitor, coupled to the first current source at the first charging terminal; and a capacitance adjusting unit, coupled to the first capacitor. In a first calibration mode, the first comparing terminal receives a reference voltage.

7. 发明申请

US20160190195A1 OPTICAL NAVIGATION MODULE CAPABLE OF PERFORMING LATERAL DETECTION AND ADJUSTING TRACKING DISTANCE 审中-公开
标题翻译：执行侧向检测和调整跟踪距离的光学导航模块
公开(公告)号：US20160190195A1
公开(公告)日：2016-06-30
申请号：US14712012
申请日：2015-05-14
申请人： PIXART IMAGING (PENANG) SDN. BHD.
发明人： SAI-MUN LEE , LYE-PIN CHU
IPC分类号： H01L27/146
CPC分类号： H01L25/167 , G06F3/042 , H01L27/14618
摘要： There is provided an optical navigation module including an optical package and a light reflective element. The optical package includes an image sensor which has a sensor surface. The light reflective element is configured to reflect light propagating parallel to the sensor surface to light propagating perpendicular to the sensor surface to impinge on the sensor surface thereby performing the lateral detection.
摘要翻译：提供了包括光学封装和光反射元件的光学导航模块。光学封装包括具有传感器表面的图像传感器。光反射元件被配置为将平行于传感器表面传播的光反射到垂直于传感器表面传播的光以照射在传感器表面上，从而执行横向检测。

8. 发明授权

US09367148B2 Selective frame rate switching 有权
标题翻译：选择性帧速率切换
公开(公告)号：US09367148B2
公开(公告)日：2016-06-14
申请号：US14258022
申请日：2014-04-22
申请人： PixArt Imaging (Penang) SDN. BHD.
发明人： Joon Chok Lee , Kevin Len Li Lim
IPC分类号： G06F3/03 , G06F3/0354
CPC分类号： G06F3/03543 , G06F3/0383
摘要： A method for selectively switching a frame rate of a mouse includes: setting a plurality of acceleration thresholds respectively corresponding to a plurality of frame rates at which the mouse is operated; operating the mouse at a first frame rate of the plurality of frame rates; determining a velocity of the mouse according to a difference between a first frame captured by the mouse at the first frame rate and a second frame following the first frame captured by the mouse at the first frame rate; determining an acceleration of the mouse between the first captured frame and second captured frame according to the velocity of the first frame, the velocity of the second frame, and the frame rate; comparing the acceleration with the plurality of thresholds; and directly switching the frame rate of the mouse to a frame rate which corresponds to the determined threshold.
摘要翻译：用于选择性地切换鼠标的帧速率的方法包括：分别对应于鼠标操作的多个帧速率设置多个加速度阈值; 以所述多个帧速率的第一帧速率操作所述鼠标; 根据鼠标以第一帧速率拍摄的第一帧与第一帧之间的第一帧以第一帧速率捕获的第一帧之间的差异，确定鼠标的速度; 根据第一帧的速度，第二帧的速度和帧速率确定第一拍摄帧和第二拍摄帧之间的鼠标的加速度; 将加速度与多个阈值进行比较; 并将鼠标的帧速率直接切换到对应于所确定的阈值的帧速率。

9. 发明授权

US09292113B2 Driving circuit with fault detection and optical input device having the same 有权
标题翻译：具有故障检测的驱动电路和具有相同功能的光输入装置
公开(公告)号：US09292113B2
公开(公告)日：2016-03-22
申请号：US14287186
申请日：2014-05-26
申请人： PIXART IMAGING (PENANG) SDN. BHD.
发明人： Lee Ling Teh , Poh Weng Yem , Keng Yeam Chang
IPC分类号： G06F3/038 , G06F3/03 , G06F3/0354
CPC分类号： G06F3/0383 , G01R31/02 , G06F3/0317 , G06F3/0354
摘要： The present disclosure provides a driving circuit, which includes a switch, a driver unit, a fault detection circuit, and a processor. The switch is coupled between a power terminal and an anode of a light emitting diode (LED) of a light source. The driver unit is coupled between a cathode of the LED and a ground for generating a driving current according to a control signal. The fault detection circuit operatively detects whether the cathode of the LED is shorted and generate a fault signal when detected that the cathode of the LED is shorted. The processor initiates a fault detection period, during which the processor turns off the switch and the driver unit causes the cathode of the LED to be floating while activates the fault detection circuit to detect whether the cathode of the LED is shorted.
摘要翻译：本公开提供了一种驱动电路，其包括开关，驱动器单元，故障检测电路和处理器。开关耦合在光源的发光二极管（LED）的电源端子和阳极之间。驱动器单元耦合在LED的阴极和根据控制信号产生驱动电流的接地之间。故障检测电路可操作地检测LED的阴极是否短路，并且在检测到LED的阴极短路时产生故障信号。处理器启动故障检测周期，在此期间处理器关闭开关，并且驱动单元使LED的阴极浮动，同时激活故障检测电路以检测LED的阴极是否短路。

10. 发明申请

US20150301627A1 Reduction of Silicon Die Size for a Navigational Sensor using Ultra High Frame Rate Acquisition 有权
标题翻译：使用超高帧率采集降低导航传感器的硅片尺寸
公开(公告)号：US20150301627A1
公开(公告)日：2015-10-22
申请号：US14257014
申请日：2014-04-21
申请人： PixArt Imaging (Penang) SDN. BHD.
发明人： Shan Chong TAN , Kok Chin Pan
IPC分类号： G06F3/038 , G06F3/03 , G06F3/0354
CPC分类号： G06F3/0383 , G06F3/0317 , G06F3/03543
摘要： A navigation device having a small navigation sensor pixel array capable of ultra high speed imaging is proposed. A first image and a second image of a plurality of images are selected according to a predetermined difference between the corresponding acquisition times of the first image and the second image. The first image and the second image are compared to determine an amount of overlap between the first image and the second image. The predetermined difference is adjusted for subsequent image comparisons according to the amount of overlap between the first image and the second image.
摘要翻译：提出了具有能够进行超高速成像的小导航传感器像素阵列的导航装置。根据第一图像和第二图像的相应采集时间之间的预定差异来选择多个图像的第一图像和第二图像。比较第一图像和第二图像以确定第一图像和第二图像之间的重叠量。根据第一图像和第二图像之间的重叠量来调整预定差异以用于后续图像比较。

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