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公开(公告)号：US11410594B1
公开(公告)日：2022-08-09
申请号：US17325215
申请日：2021-05-20
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Chun-Hung Chen , Chia-Hsin Tung , Hsin-Hung Ou , Hung-Yi Lin
IPC: G09G3/20
Abstract: A method of dynamic bias control of a source driver bases on data wing level for power-saving. In order to cover the operating conditions of various loads under normal operations, the output buffer circuit operation is biased. The method utilizes the display gray scale difference between a previous data line and an immediately subsequent data line to determine the bias current to be used for the output buffer. When the difference between the current data line display gray scale and the previous data line display gray scale is not large, the bias current of the output buffer can be reduced. When the difference between the current data line display gray scale and the previous data line display gray scale is large, the bias current of the output buffer is increased and the current of the output buffer is adjusted according to different load conditions to save power.
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公开(公告)号：US20210366407A1
公开(公告)日：2021-11-25
申请号：US17123129
申请日：2020-12-16
Applicant: Novatek Microelectronics Corp.
Inventor： Chun-Hung Chen , Chia-Hsin Tung , Hsin-Hung Ou , Hung-Yi Lin
IPC: G09G3/3291 , G09G3/3258
Abstract: A driving device and an operation method thereof are provided. The driver device includes a source driver circuit, an output switching circuit, and an equalization control circuit. Two input ends of the output switching circuit are coupled to two output ends of the source driver circuit. Two output ends of the output switching circuit are coupled to two data lines of an LED display panel. The equalization control circuit checks whether sub-pixel data of the two data lines meets a predetermined condition. A plurality of sub-pixels located on a current display line of the LED display panel are reset in a reset period. In a data scanning period after the reset period, the equalization control circuit determines whether to control the output switching circuit to perform an equalization operation on the two data lines according to the checking result.
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公开(公告)号：US10902791B2
公开(公告)日：2021-01-26
申请号：US16522661
申请日：2019-07-26
Applicant: NOVATEK Microelectronics Corp.
Inventor： Chia-Hsin Tung , Chun-Hung Chen
IPC: G09G3/3275
Abstract: A method of controlling a source driver includes the steps of: detecting a line of image data to be outputted by a plurality of channels of the source driver, to generate a detection result; generating a plurality of control signals according to the detection result, each of the plurality of control signals corresponding to a channel among the plurality of channels; and enabling or disabling an operational amplifier in each of the plurality of channels via one of the plurality of control signals corresponding to the channel.
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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
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.
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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.
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Patent Agency Ranking
公开(公告)号：US09702914B2
公开(公告)日：2017-07-11
申请号：US14474296
申请日：2014-09-01
Applicant: NOVATEK Microelectronics Corp.
Inventor： He-Wei Huang , Chun-Hung Chen , Chih-Yuan Chang
CPC classification number: G01R27/2605 , G06F3/044 , H03K17/962 , H03K2217/960725
Abstract: A capacitance measurement device for measuring the capacitance of a measured capacitor includes a charging control unit for charging the measured capacitor; a discharging control unit for discharging the measured capacitor; a voltage converting circuit coupled to the measured capacitor, for converting a voltage signal on the measured capacitor into a value that represents the capacitance of the measured capacitor; wherein in a first period, one of the charging control unit and the discharge control unit charges/discharges the measured capacitor and in a second period after the first period, the other one of the charging control unit and the discharge control unit discharges/charges the measured capacitor.
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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。
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8.发明申请公开(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。
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公开(公告)号：US10474293B2
公开(公告)日：2019-11-12
申请号：US15726404
申请日：2017-10-06
Applicant: NOVATEK Microelectronics Corp.
Inventor： Hung-Cheng Kuo , Yung-Fu Lin , Chun-Hung Chen , Ting-Hsuan Hung
Abstract: A signal processing method for a touch panel includes transmitting a first driving signal to a first touch channel of the touch panel; and transmitting a second driving signal to a second touch channel of the touch panel, wherein the second touch channel is neighboring to the first touch channel. The first driving signal is substantially identical to the second driving signal during a first period, and the first driving signal is substantially inverse to the second driving signal during a second period neighboring to the first period.
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公开(公告)号：US10461742B2
公开(公告)日：2019-10-29
申请号：US15255138
申请日：2016-09-01
Applicant: Novatek Microelectronics Corp.
Inventor： Chun-Hung Chen
IPC: H03K5/08 , H03F3/45 , H02M3/04 , G11C11/4074 , H03K17/16 , H03K17/687 , H02M3/07 , H03K17/12
Abstract: The invention is directed to the selectable mode buffer circuit including a plurality of pads, a mode selecting circuit, and a control circuit. The mode selecting circuit has a plurality of switches, coupled to the pads, and performs a charge pumping operation or an interfacing operating by changing on or off status of at least one of the switches according to a mode selecting signal. The control circuit receives the mode selecting signal, and generates a plurality of input signals for controlling the switches according to the mode selecting signal.
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