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    Handwriting System and Sensing Method Thereof
    1.
    发明申请
    Handwriting System and Sensing Method Thereof 有权
    手写体系及其传感方法

    公开(公告)号：US20130106786A1

    公开(公告)日：2013-05-02

    申请号：US13664388

    申请日：2012-10-30

    Applicant: PIXART IMAGING INC.

    Inventor： SHU-SIAN YANG ,  HAN-PING CHENG

    IPC: G06F3/042

    CPC classification number: G06F3/042 ,  G06F1/169 ,  G06F3/0421 ,  G06F3/0425

    Abstract: A handwriting system includes a first light source module, a second light source module, an image sensing device and a processing circuit. The first light source module is configured to provide a first light to illuminate an object on a plane. The second light source module is configured to provide a second light to illuminate the object on the plane, wherein the second light source module is disposed under the first light source module. The image sensing device is disposed above the plane and configured to capture an image of the object reflecting the first light only or an image of the object reflecting the first and the second lights both. The processing circuit is electrically connected to the image sensing device and configured to receive the image captured by the image sensing device and generate control information according to light-spot information in the captured image.

    Abstract translation: 手写系统包括第一光源模块，第二光源模块，图像感测装置和处理电路。 第一光源模块被配置为提供第一光以照亮平面上的物体。 第二光源模块被配置为提供第二光以照亮平面上的物体，其中第二光源模块设置在第一光源模块下方。 图像感测装置设置在平面上方并且被配置为捕获反映仅第一光的物体的图像或反射第一和第二光的物体的图像。 处理电路电连接到图像感测装置并且被配置为接收由图像感测装置捕获的图像，并且根据捕获的图像中的光点信息生成控制信息。

    HANDHELD DEVICE AND POSITIONING METHOD THEREOF
    3.
    发明申请
    HANDHELD DEVICE AND POSITIONING METHOD THEREOF 审中-公开

    公开(公告)号：US20170371425A1

    公开(公告)日：2017-12-28

    申请号：US15687525

    申请日：2017-08-27

    Applicant: PIXART IMAGING INC.

    Inventor： HAN-PING CHENG ,  CHAO-CHIEN HUANG

    IPC: G06F3/03 ,  G06F3/038 ,  G06F3/0346

    CPC classification number: G06F3/0304 ,  G06F3/0346 ,  G06F3/0383

    Abstract: A positioning method and a handheld device for performing the method are disclosed. In the method, a handheld device captures images corresponding to positions of a reference when the handheld device points toward the reference. A first image position, a first tilt angle indicative of a rotation angle of the handheld device, and a first pointing coordinate of the reference can obtained. A second pointing coordinate according to the first image position and a second tilt angle are obtained. Therefore, a first displacement vector between the first pointing coordinate and the second pointing coordinate can be computed. A third pointing coordinate can also be obtained. When a substantial movement of the positions of the reference revealed in the images captured by the handheld device is found, an output pointing coordinate is obtained. The output can be outputting a cursor parameter for controlling a cursor controlled by the handheld device.

    POINTER POSITIONING METHOD OF HANDHELD POINTER DEVICE
    4.
    发明申请
    POINTER POSITIONING METHOD OF HANDHELD POINTER DEVICE 有权
    手指定位装置的指针定位方法

    公开(公告)号：US20150009141A1

    公开(公告)日：2015-01-08

    申请号：US14318627

    申请日：2014-06-28

    Applicant: PIXART IMAGING INC.

    Inventor： HAN-PING CHENG ,  CHAO-CHIEN HUANG ,  CHIA-CHEUN LIANG

    IPC: G06F3/0346

    CPC classification number: G06F3/0346 ,  G06F3/0325 ,  G06F3/038 ,  G06F3/04812 ,  G06F2203/0384

    Abstract: A pointer positioning method of a handheld pointer device, which includes capturing a first image frame containing a reference point to compute a first pointing coordinate according to the image position of the reference point in the first image frame; generating a cursor parameter of a cursor according to the first pointing coordinate; when the handheld pointer device enters a pointer-lock mode, records the first pointing coordinate and positions the cursor at the first pointing coordinate on a display apparatus; when the handheld pointer device exits the pointer-lock mode, captures a second image frame to compute a second pointing coordinate according to the image position of the reference point in the second image frame to obtain a displacement vector between the first and the second pointing coordinates; generating the cursor parameter and controlling the movement of the cursor according to the displacement vector and the first pointing coordinate.

    Abstract translation: 一种手持式指针装置的指针定位方法，其特征在于，包括拍摄包含基准点的第一图像帧，根据所述参照点在所述第一图像帧中的图像位置来计算第一指示坐标; 根据第一指向坐标生成光标的光标参数; 当手持式指针装置进入指针锁定模式时，记录第一指示坐标并将光标定位在显示装置上的第一指向坐标处; 当手持指针装置退出指针锁定模式时，根据第二图像帧中的参考点的图像位置捕获第二图像帧以计算第二指示坐标，以获得第一和第二指示坐标之间的位移矢量 ; 生成光标参数，并根据位移矢量和第一指向坐标来控制光标的移动。

    Handwriting Systems and Operation Methods Thereof
    5.
    发明申请
    Handwriting Systems and Operation Methods Thereof 审中-公开
    手写系统及其操作方法

    公开(公告)号：US20130162592A1

    公开(公告)日：2013-06-27

    申请号：US13663470

    申请日：2012-10-30

    Applicant: Pixart Imaging Inc.

    Inventor： HAN-PING CHENG ,  SHU-SIAN YANG

    IPC: G06F3/045

    CPC classification number: G06F3/0425 ,  G06F3/045 ,  G06F3/04883

    Abstract: A handwriting system includes a light source module, an image sensing apparatus and a processing circuit. The light source module is configured to provide a light source to illuminate an object on a plane. The image sensing apparatus is disposed on the plane and configured to capture an image of the object reflecting the light source. The processing circuit is electrically connected to the image sensing apparatus and configured to receive the image captured by the image sensing apparatus, analyze the shape of each of light spot(s) in the captured image and filter out the light spot(s) not qualified to the shape of the object. Another handwriting system and two handwriting system operation methods are also provided.

    Abstract translation: 手写系统包括光源模块，图像感测装置和处理电路。 光源模块被配置为提供光源以照亮平面上的物体。 图像感测装置设置在平面上并且被配置为捕获反映光源的对象的图像。 处理电路电连接到图像感测装置，并被配置为接收由图像感测装置拍摄的图像，分析捕获图像中的每个光点的形状并滤出不合格的光点 对象的形状。 还提供了另一个手写系统和两个手写系统操作方法。

    OBJECT DETECTION METHOD AND CALIBRATION APPARATUS OF OPTICAL TOUCH SYSTEM
    10.
    发明申请
    OBJECT DETECTION METHOD AND CALIBRATION APPARATUS OF OPTICAL TOUCH SYSTEM 审中-公开
    光学触摸系统的对象检测方法和校准装置

    公开(公告)号：US20150253934A1

    公开(公告)日：2015-09-10

    申请号：US14615670

    申请日：2015-02-06

    Applicant: PIXART IMAGING INC.

    Inventor： YU-CHIA LIN ,  CHUAN-CHING LIN ,  YU-HSIN LIN ,  HAN-PING CHENG ,  TZUNG-MIN SU ,  CHIH-HSIN LIN ,  HSIN-CHI CHENG ,  CHUN-SHENG LIN ,  YU-HSIANG HUANG ,  KUAN-HSU CHEN ,  CHUN-YI LU

    IPC: G06F3/042

    CPC classification number: G06F3/0428 ,  G06F3/0418

    Abstract: The present disclosure provides an object detection method including: pre-storing a lookup table of touch reference values, wherein the lookup table of touch reference values records a plurality of touch reference values associated with image positions of a plurality of calibration object images formed in calibration images captured by a first image sensor; capturing a first image, wherein the first image has at least an object image corresponding to a pointer formed therein; generating a first light distribution curve according to the first image; defining a first detection region in the first light distribution curve; obtaining at least one touch reference value associated with the object image using the lookup table of touch reference values; comparing at least one brightness value within the first detection region of the first light distribution curve with the at least one touch reference value obtained.

    Abstract translation: 本公开提供一种对象检测方法，包括：预存储触摸参考值的查找表，其中所述触摸参考值的查找表记录与校准中形成的多个校准对象图像的图像位置相关联的多个触摸参考值 由第一图像传感器拍摄的图像; 拍摄第一图像，其中所述第一图像至少具有与其中形成的指针相对应的对象图像; 根据第一图像生成第一光分布曲线; 在第一光分布曲线中限定第一检测区域; 使用所述触摸参考值的查找表获得与所述对象图像相关联的至少一个触摸参考值; 将第一光分布曲线的第一检测区域内的至少一个亮度值与所获得的至少一个触摸参考值进行比较。

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