公开(公告)号：US20150205375A1

公开(公告)日：2015-07-23

申请号：US14593043

申请日：2015-01-09

Applicant: PIXART IMAGING INC.

Inventor： Chi-Chieh LIAO ,  Han-Shu LIN ,  Tse-Chung SU

IPC: G06F3/038 ,  G06F3/0354 ,  G06F3/041

CPC classification number: G06F3/038 ,  G06F3/0213 ,  G06F3/03547 ,  G06F3/0416

Abstract: A method of determining an adaptive DPI curve includes the steps of: detecting, by a sensing element, an object on a touch surface and outputting a detected frame; calculating, by a processing unit, a contact range according to the detected frame; and determining a DPI curve according to the contact range.

Abstract translation: 确定自适应DPI曲线的方法包括以下步骤：通过感测元件检测触摸表面上的对象并输出检测到的帧; 由处理单元根据检测到的帧计算接触范围; 并根据接触范围确定DPI曲线。

公开(公告)号：US20140043297A1

公开(公告)日：2014-02-13

申请号：US13856432

申请日：2013-04-03

Applicant: PIXART IMAGING INC.

Inventor： Tzung-Min SU ,  Chi-Chieh LIAO ,  Han-Ping CHENG ,  Chih-Hsin LIN ,  Ming-Tsan KAO

IPC: G06F3/042

CPC classification number: G06F3/042 ,  G06F3/0418 ,  G06F3/0428 ,  G06F2203/04104

Abstract: An optical touch control method includes steps of: providing a bright background from at least one edge of a touch surface in a first period; providing illumination light to the touch surface in a second period; capturing a first image of an indicator object blocking a portion of the bright background in the first period; and capturing a second image of the indicator object reflecting the illumination light in the second period. An optical touch system is also provided.

Abstract translation: 光学触摸控制方法包括以下步骤：在第一周期中从触摸表面的至少一个边缘提供明亮的背景; 在第二周期中向所述触摸表面提供照明光; 捕获在所述第一周期中阻挡所述明亮背景的一部分的指示对象的第一图像; 以及在所述第二周期中捕获反映所述照明光的所述指示对象的第二图像。 还提供了光学触摸系统。

公开(公告)号：US20220357829A1

公开(公告)日：2022-11-10

申请号：US17316345

申请日：2021-05-10

Applicant: PIXART IMAGING INC.

Inventor： Chi-Chieh LIAO

IPC: G06F3/041 ,  G06F3/044

Abstract: There is provided a touch force sensor including a first drive electrode, a second drive electrode and a receiving electrode. The first drive electrode is used to form a first capacitance with the receiving electrode. The second drive electrode is used to form a second capacitance with the receiving electrode. The receiving electrode shields the first drive electrode such that when a conductor approaches the receiving electrode, only the second capacitance is changed but the first capacitance is not changed. The first capacitance is changed only when the conductor gives a force upon the receiving electrode.

公开(公告)号：US20170045969A1

公开(公告)日：2017-02-16

申请号：US15337555

申请日：2016-10-28

Applicant: PIXART IMAGING INC.

Inventor： Chi-Chieh LIAO ,  Yi-Hsien KO ,  Chih-Hsiung SHIH

IPC: G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0338 ,  G06F3/0416 ,  G06F2203/04102 ,  G06F2203/04103 ,  G06F2203/04105 ,  Y10T29/49155

Abstract: A capacitive finger navigation module including a pressure detection mode and a finger movement detection mode is provided. In the pressure detection mode, a finger press is detected to generate a continuous cursor movement signal. In the finger movement detection mode, a finger movement is detected to generate a single cursor movement signal.

Abstract translation: 提供了包括压力检测模式和手指移动检测模式的电容手指导航模块。 在压力检测模式中，检测到手指按压以产生连续的光标移动信号。 在手指移动检测模式中，检测到手指移动以产生单个光标移动信号。