公开(公告)号：US10216325B2

公开(公告)日：2019-02-26

申请号：US16021029

申请日：2018-06-28

Applicant: Novatek Microelectronics Corp.

Inventor： Hung-Cheng Kuo

IPC: G06F3/041 ,  G06F3/044

Abstract: A touch sensing circuit including a plurality of touch sensing channels is provided. Each of the touch sensing channels includes at least one operational amplifier circuit and a demodulating circuit. The operational amplifier circuit is configured to receive a touch sensing signal, and amplify the touch sensing signal. The operational amplifier circuit includes an operational amplifier. The operational amplifier has an inverting end, and the inverting end is coupled to a direct-current voltage. The demodulating circuit is coupled to the operational amplifier circuit. The demodulating circuit is configured to demodulate the amplified touch sensing signal by mixing the amplified touch sensing signal with a demodulating signal. In addition, a signal demodulating method is also provided.

公开(公告)号：US10088956B2

公开(公告)日：2018-10-02

申请号：US15889228

申请日：2018-02-06

Applicant: NOVATEK Microelectronics Corp.

Inventor： Hung-Cheng Kuo ,  Chun-Hung Chen ,  Chun-Ching Huang

IPC: G06F13/12 ,  G06F13/38 ,  G06F3/041

Abstract: A method of determining a touch event in a touch detection system includes: receiving at least one sensing signal corresponding to at least one driving signal configured to drive a touch panel; determining whether a touch event occurs by performing an initial digital operation on the at least one sensing signal; performing an entire determination on the at least one sensing signal after at least one of one or more predetermined conditions is determined to be satisfied, wherein one of the one or more predetermined conditions is that the touch event is determined to occur; and not performing the entire determination on the at least one sensing signal after each of the one or more predetermined conditions is determined to be unsatisfied.

公开(公告)号：US10042463B2

公开(公告)日：2018-08-07

申请号：US15009753

申请日：2016-01-28

Applicant: Novatek Microelectronics Corp.

Inventor： Hung-Cheng Kuo

IPC: G06F3/041 ,  G06F3/044

Abstract: A touch sensing circuit including a plurality of touch sensing channels is provided. Each of the touch sensing channels includes at least one operational amplifier circuit and a demodulating circuit. The operational amplifier circuit is configured to receive a touch sensing signal, and amplify the touch sensing signal. The operational amplifier circuit includes an operational amplifier. The operational amplifier has an inverting end, and the inverting end is coupled to a direct-current voltage. The demodulating circuit is coupled to the operational amplifier circuit. The demodulating circuit is configured to demodulate the amplified touch sensing signal by mixing the amplified touch sensing signal with a demodulating signal. A waveform of the demodulating signal includes a flat region. In addition, a signal demodulating method is also provided.

公开(公告)号：US10037094B2

公开(公告)日：2018-07-31

申请号：US14925986

申请日：2015-10-29

Applicant: NOVATEK Microelectronics Corp.

Inventor： Chun-Ching Huang ,  Hung-Cheng Kuo ,  Chun-Hung Chen

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/041 ,  G06F3/0418 ,  G06F3/044

Abstract: A carrier touch sensing system includes a demodulation circuit coupled to a touch panel, used for performing in-phase and quadrature demodulations to a plurality of carrier sensing signals to generate and store a plurality of phase delay information if the carrier touch sensing system operates in a phase calibration mode. The demodulation circuit is further used for performing in-phase demodulation to the plurality of carrier sensing signals according to the plurality of phase delay information to generate a plurality of touch signals if the carrier touch sensing system operates in a normal scan mode.

公开(公告)号：US20170351382A1

公开(公告)日：2017-12-07

申请号：US15663834

申请日：2017-07-31

Applicant: NOVATEK Microelectronics Corp.

Inventor： Hung-Cheng Kuo ,  Chun-Hung Chen ,  Chun-Ching Huang

IPC: G06F3/041

CPC classification number: G06F3/0418 ,  G06F3/041

Abstract: A noise detection device includes a drive circuit, a sense circuit and a controller. The drive circuit drives a plurality of drive lines having a first polarity pattern and a second polarity pattern, wherein an operation of the first polarity pattern and the second polarity pattern substantially equals zero over a predetermined time period. The sense circuit senses a plurality of sense signals from at least one sense line during the predetermined time period. The controller derives a magnitude of a noise signal from the at least one sense line according to the sense signals.

公开(公告)号：US20150338448A1

公开(公告)日：2015-11-26

申请号：US14285604

申请日：2014-05-22

Applicant: Novatek Microelectronics Corp.

Inventor： Hung-Cheng Kuo ,  Po-Wei Chen ,  Chun-Hung Chen

IPC: G01R29/26

CPC classification number: G01R29/26 ,  G06F3/0418 ,  G06F3/044

Abstract: A noise detection device, system, and a method of detecting noise signals are disclosed. The noise detection device includes a drive circuit, a sense circuit and a controller. The drive circuit drives a plurality of drive lines having a first polarity pattern and a second polarity pattern, wherein an operation of the first polarity pattern and the second polarity pattern substantially equals zero over a predetermined time period. The sense circuit senses a plurality of sense signals from at least one sense line during the predetermined time period. The controller derives a magnitude of a noise signal from the at least one sense line according to the sense signals.

Abstract translation: 公开了噪声检测装置，系统和检测噪声信号的方法。 噪声检测装置包括驱动电路，感测电路和控制器。 驱动电路驱动具有第一极性图案和第二极性图案的多个驱动线，其中第一极性图案和第二极性图案的操作在预定时间段内基本上等于零。 感测电路在预定时间段期间感测来自至少一个感测线的多个感测信号。 控制器根据感测信号从至少一个感测线导出噪声信号的幅度。

公开(公告)号：US20150309603A1

公开(公告)日：2015-10-29

申请号：US14475582

申请日：2014-09-03

Applicant: Novatek Microelectronics Corp.

Inventor： Hung-Cheng Kuo ,  Tsen-Wei Chang ,  Chun-Hung Chen

IPC: G06F3/041

CPC classification number: G06F3/041 ,  G06F3/0416 ,  G06K9/00503

Abstract: A phase compensation method for multi-scan in touch sensing system is provided. The phase compensation method includes the following steps. A plurality of carrier signals are received, and a demodulating operation is preformed on each of the carrier signals to obtain a first component signal and a second component signal of each of the carrier signals. An inverse matrix operation is respectively preformed on the first component signal and the second component signal both demodulated by the demodulating operation. A signal mixing operation is preformed on the first component signal and the second component signal both processed by the inverse matrix operation to obtain raw data of each of the carrier signals. Furthermore, a phase compensation circuit applying afore-said phase compensation method is also provided.

Abstract translation: 提供了一种用于触摸感测系统中多扫描的相位补偿方法。 相位补偿方法包括以下步骤。 接收多个载波信号，并且在每个载波信号上执行解调操作，以获得每个载波信号的第一分量信号和第二分量信号。 分别在通过解调操作解调的第一分量信号和第二分量信号上进行逆矩阵运算。 在第一分量信号和第二分量信号上执行信号混合操作，二者通过逆矩阵运算进行处理，以获得每个载波信号的原始数据。 此外，还提供了应用上述相位补偿方法的相位补偿电路。

公开(公告)号：US10152148B2

公开(公告)日：2018-12-11

申请号：US14475582

申请日：2014-09-03

Applicant: Novatek Microelectronics Corp.

Inventor： Hung-Cheng Kuo ,  Tsen-Wei Chang ,  Chun-Hung Chen

IPC: G06F3/041 ,  G06K9/00

Abstract: A phase compensation method for multi-scan in touch sensing system is provided. The phase compensation method includes the following steps. A plurality of carrier signals are received, and a demodulating operation is preformed on each of the carrier signals to obtain a first component signal and a second component signal of each of the carrier signals. An inverse matrix operation is respectively preformed on the first component signal and the second component signal both demodulated by the demodulating operation. A signal mixing operation is preformed on the first component signal and the second component signal both processed by the inverse matrix operation to obtain raw data of each of the carrier signals. Furthermore, a phase compensation circuit applying afore-said phase compensation method is also provided.

公开(公告)号：US20180314388A1

公开(公告)日：2018-11-01

申请号：US16029665

申请日：2018-07-09

Applicant: NOVATEK Microelectronics Corp.

Inventor： Hung-Cheng Kuo ,  Chun-Hung Chen ,  Chun-Ching Huang

IPC: G06F3/041

Abstract: A method for processing sensing signals in a sensing system includes receiving at least one sensing signal; performing a first operation on the at least one sensing signal to determine whether the at least one sensing signal satisfies a first predetermined condition; performing a second operation on the at least one sensing signal after a second predetermined condition is determined to be satisfied, wherein the second predetermined condition comprises a condition that the first predetermined condition is determined to be satisfied, wherein the second operation provides more sensing information than the first operation; and not performing the second operation on the at least one sensing signal after a third predetermined condition is determined to be satisfied, wherein the third predetermined condition comprises a condition that the first predetermined condition is determined to be unsatisfied.

公开(公告)号：US20180314382A1

公开(公告)日：2018-11-01

申请号：US16021029

申请日：2018-06-28

Applicant: Novatek Microelectronics Corp.

Inventor： Hung-Cheng Kuo

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0416 ,  G06F3/0418 ,  G06F3/044

Abstract: A touch sensing circuit including a plurality of touch sensing channels is provided. Each of the touch sensing channels includes at least one operational amplifier circuit and a demodulating circuit. The operational amplifier circuit is configured to receive a touch sensing signal, and amplify the touch sensing signal. The operational amplifier circuit includes an operational amplifier. The operational amplifier has an inverting end, and the inverting end is coupled to a direct-current voltage. The demodulating circuit is coupled to the operational amplifier circuit. The demodulating circuit is configured to demodulate the amplified touch sensing signal by mixing the amplified touch sensing signal with a demodulating signal. In addition, a signal demodulating method is also provided.