公开(公告)号：US09395858B2

公开(公告)日：2016-07-19

申请号：US14337325

申请日：2014-07-22

Applicant: PIXART IMAGING INC.

Inventor： Chung-Wen Lo ,  Tom Murphy ,  Hsin-Chia Chen

IPC: G06F3/045 ,  G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0338 ,  G06F3/03547 ,  G06F3/0412

Abstract: There is provided an operating method of a capacitive finger navigation device including the steps of: calculating a touch coordinate according to a predetermined position coordinate and associated detected variation of each of a plurality of detecting cells when the associated detected variations of the detecting cells exceed a threshold; mapping the touch coordinate to a touch position associated with a touch surface; entering a relative motion mode when the touch position is in a first area; and entering an absolute coordinate mode when the touch position is in a second area.

Abstract translation: 提供了一种电容手指导航装置的操作方法，包括以下步骤：当检测单元的相关联的检测变化超过一个时，根据预定位置坐标和相关联的检测到的多个检测单元的检测变化来计算触摸坐标 阈; 将所述触摸坐标映射到与触摸表面相关联的触摸位置; 当触摸位置处于第一区域时进入相对运动模式; 并且当触摸位置处于第二区域时进入绝对坐标模式。

公开(公告)号：US09170693B2

公开(公告)日：2015-10-27

申请号：US14085934

申请日：2013-11-21

Applicant: PIXART IMAGING INC.

Inventor： Tom Murphy ,  Hsin-Chia Chen ,  William Han ,  Raman Sahgal

IPC: G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0416

Abstract: There is provided a capacitive touch system including a gain control unit sequentially receiving a plurality of digital detected signals of a detection frame. The gain control unit includes a gain buffer and a control circuit. The gain buffer is configured to store a current gain sheet. The control circuit calculates a first gain sheet according to a setpoint and the digital detected signals of the detection frame, compares a current roughness of the current gain sheet with a first roughness of the first gain sheet and replaces the current gain sheet in the gain buffer by the first gain sheet when the first roughness is flatter than the current roughness.

Abstract translation: 提供了一种电容式触摸系统，其包括依次接收检测帧的多个数字检测信号的增益控制单元。 增益控制单元包括增益缓冲器和控制电路。 增益缓冲器配置为存储当前增益表。 控制电路根据设定点和检测帧的数字检测信号来计算第一增益片，将当前增益片的当前粗糙度与第一增益片的第一粗糙度进行比较，并将增益缓冲器中的当前增益片代替 当第一粗糙度比当前粗糙度更平坦时，通过第一增益片。

公开(公告)号：US09389742B2

公开(公告)日：2016-07-12

申请号：US14565622

申请日：2014-12-10

Applicant: PIXART IMAGING INC.

Inventor： Ken Crandall ,  Chung-Wen Lo ,  David Touney ,  Tom Murphy ,  Hsin-Chia Chen

IPC: G06F3/045 ,  G06F3/044

CPC classification number: G06F3/044 ,  G06F3/0416

Abstract: There is provided a capacitive touch device including a touch panel, a detection circuit and a processing unit. The touch panel includes a plurality of drive electrodes and a plurality of receiving electrodes configured to form a coupling electric field with an external touch panel, and the receiving electrodes are respectively configured to output a detection signal. The detection circuit is coupled to one of the receiving electrodes and configured to modulate the detection signal with two signals to generate two detection components. The processing unit is configured to obtain a phase value according to the two detection components to accordingly decode transmission data.

Abstract translation: 提供了一种包括触摸面板，检测电路和处理单元的电容式触摸装置。 触摸面板包括多个驱动电极和被配置为与外部触摸面板形成耦合电场的多个接收电极，并且接收电极分别被配置为输出检测信号。 检测电路耦合到接收电极中的一个并被配置为用两个信号调制检测信号以产生两个检测分量。 处理单元被配置为根据两个检测组件获得相位值，以相应地解码发送数据。