公开(公告)号：US09952732B2

公开(公告)日：2018-04-24

申请号：US15176687

申请日：2016-06-08

Applicant: PixArt Imaging Inc.

Inventor： Sung-Han Wu ,  Yu-Han Chen ,  Ming-Hung Tsai ,  Meng-Lin Yu ,  Hsin-Chia Chen

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

CPC classification number: G06F3/044 ,  G06F3/0418

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.

公开(公告)号：US10831321B2

公开(公告)日：2020-11-10

申请号：US15957726

申请日：2018-04-19

Applicant: PixArt Imaging Inc.

Inventor： Kok-Siang Tan ,  Yu-Han Chen ,  Meng-Lin Yu ,  Kei-Tee Tiew

IPC: G06F3/044

Abstract: There is provided a parallel sensing touch control device including a capacitive sensor array processed by differential unit. In one detection interval, the device is concurrently conducting more than one sensing electrode of the capacitive sensor array so as to reduce a scanning interval of the capacitive sensor array. The differential unit performs a differential operation on detected signals to cancel out common mode noise.

公开(公告)号：US10430005B2

公开(公告)日：2019-10-01

申请号：US15893114

申请日：2018-02-09

Applicant: PixArt Imaging Inc.

Inventor： Sung-Han Wu ,  Yu-Han Chen ,  Ming-Hung Tsai ,  Meng-Lin Yu ,  Hsin-Chia Chen

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

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.