公开(公告)号：US20170220177A1

公开(公告)日：2017-08-03

申请号：US15009753

申请日：2016-01-28

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. A waveform of the demodulating signal includes a flat region. In addition, a signal demodulating method is also provided.

公开(公告)号：US20150338993A1

公开(公告)日：2015-11-26

申请号：US14710618

申请日：2015-05-13

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 method of determining a touch event in a touch detection system includes transmitting at least one driving signal to a touch panel of the touch detection system; receiving a sensing signal corresponding to the driving signal from the touch panel; determining whether the touch event occurs by performing an initial digital operation on the sensing signal; determining whether the sensing signal is interfered with by a noise signal; and performing an entire determination on the sensing signal when the touch event is determined to occur or the sensing signal is determined to be interfered with by the noise signal.

Abstract translation: 一种在触摸检测系统中确定触摸事件的方法包括将至少一个驱动信号发送到触摸检测系统的触摸面板; 从所述触摸面板接收与所述驱动信号相对应的感测信号; 通过对感测信号执行初始数字操作来确定触摸事件是否发生; 确定感测信号是否被噪声信号干扰; 以及当确定触摸事件发生时或者感测信号被噪声信号干扰时，对感测信号执行整个确定。

公开(公告)号：US20150338992A1

公开(公告)日：2015-11-26

申请号：US14607031

申请日：2015-01-27

Applicant: Novatek Microelectronics Corp.

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

IPC: G06F3/041

CPC classification number: G06F3/0418 ,  G06F3/044

Abstract: A noise detection method including the following steps is provided. During different time periods, plural sets of driving signals are respectively transmitted to driving lines of the touch panel to drive sensing lines of the touch panel to generate plural sets of sensing signals. The plural sets of sensing signals are respectively received and calculated to obtain plural sets of summation signals. One set of summation signals includes first summation signals, and another set of summation signals includes second summation signals. A part or all of the first summation signals is replaced by the second summation signals. A signal value of a combination of the first and the second summation signals is calculated to obtain a summation thereof. The summation of the signal value of the combination is smaller than a summation of a signal values of the first summation signals before recombination.

Abstract translation: 提供了包括以下步骤的噪声检测方法。 在不同的时间段期间，将多组驱动信号分别发送到触摸面板的驱动线，以驱动触控面板的感测线，产生多组感测信号。 分别接收和计算多组感测信号以获得多组求和信号。 一组求和信号包括第一求和信号，另一组求和信号包括第二求和信号。 第一求和信号的一部分或全部由第二求和信号代替。 计算第一和第二求和信号的组合的信号值以获得其总和。 组合的信号值的总和小于复合之前的第一求和信号的信号值的总和。