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公开(公告)号：US20190107916A1
公开(公告)日：2019-04-11
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
CPC classification number: G06F3/0418 , G06F3/044
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：US20180157374A1
公开(公告)日：2018-06-07
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: G06F3/041
CPC classification number: G06F3/0418 , 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.
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公开(公告)号：US09766752B2
公开(公告)日：2017-09-19
申请号：US14710618
申请日：2015-05-13
Applicant: NOVATEK Microelectronics Corp.
Inventor： Hung-Cheng Kuo , Chun-Hung Chen , Chun-Ching Huang
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.
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公开(公告)号：US08810288B2
公开(公告)日：2014-08-19
申请号：US13786481
申请日：2013-03-06
Applicant: Novatek Microelectronics Corp.
Inventor： Chun-Hung Chen
IPC: H03B1/00
CPC classification number: H03K3/012 , H03F3/3023 , H03F3/45183 , H03F3/45219 , H03F2203/45634 , H03F2203/45674 , H03K19/00
Abstract: An output buffer is disclosed. The output buffer includes an input-stage circuit, an output-stage circuit and a compensation circuit. The compensation circuit includes a capacitor, a first switch, a second switch, a third switch, and a fourth switch. The input-stage circuit receives a differential input signal and outputting a response signal. The output-stage circuit receives the response signal and outputting an output signal. The first switch controls a connection between the input-stage circuit and a first terminal of the capacitor. The second switch controls the connection between an output terminal of the compensation circuit and a second terminal of the capacitor. The third switch controls the connection between the input-stage circuit and the second-terminal of the capacitor. The forth switch controls the connection between the output terminal of the compensation circuit and the first terminal of the capacitor.
Abstract translation: 公开了输出缓冲器。 输出缓冲器包括输入级电路，输出级电路和补偿电路。 补偿电路包括电容器，第一开关，第二开关，第三开关和第四开关。 输入级电路接收差分输入信号并输出响应信号。 输出级电路接收响应信号并输出输出信号。 第一开关控制输入级电路和电容器的第一端之间的连接。 第二开关控制补偿电路的输出端子和电容器的第二端子之间的连接。 第三开关控制输入级电路和电容器的第二端之间的连接。 第四开关控制补偿电路的输出端子与电容器的第一端子之间的连接。
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15.发明申请公开(公告)号：US20210349601A1
公开(公告)日：2021-11-11
申请号：US17313818
申请日：2021-05-06
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Chun-Hung Chen , Kai-Wen Shao , Feng-Lin Chan , Shuo-Wen Jang
IPC: G06F3/041 , G09G3/3208
Abstract: The disclosure provides a method for driving an OLED touch-and-display device, a driving circuit, and the OLED touch-and-display device. The method includes: dividing each display frame into at least one display period and at least one touch detection period which are alternated; during each display period, generating sequentially-shifted gate driving signals and sequentially-shifted light-emission control signals, and sequentially applying them to at least a part of gate driving lines of the plurality and corresponding light-emission control lines; during each touch detection period: suspending the generation of gate driving signals or also suspending the generation of light-emission control signals; adjusting the average display luminance of a plurality of rows of pixels within a predetermined time period, so that the display luminance is uniform, and the gate driving signal for each row of pixels and the light-emission control signal of the light-emission control line maintain a preset timing relationship.
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Patent Agency Ranking
16.发明申请公开(公告)号：US20210349600A1
公开(公告)日：2021-11-11
申请号：US17313810
申请日：2021-05-06
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Chun-Hung Chen , Kai-Wen Shao , Feng-Lin Chan , Shuo-Wen Jang
IPC: G06F3/041 , G09G3/3233 , G06F3/044
Abstract: The disclosure provides a method for driving an OLED touch-and-display device, a driving circuit, and an OLED touch-and-display device. The method includes: generating gate driving signals that are sequentially shifted based on the first clock signal (GCK); sequentially applying the gate driving signals that are sequentially shifted to the plurality of GLs; writing display data in a display driving period for each row of pixels, to the row of pixels, wherein a time length of the display driving period depends on a corresponding gate driving signal and is smaller than the clock cycle; and for a display driving period for each of at least one row of pixels, setting a touch detection period corresponding to the display driving period or corresponding to the display driving period for previous row of pixels at least partially overlapping with the display driving period in time.
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17.发明授权公开(公告)号：US10359796B1
公开(公告)日：2019-07-23
申请号：US16221608
申请日：2018-12-17
Applicant: NOVATEK Microelectronics Corp.
Inventor： Jie-Yu Liao , Chun-Hung Chen , Hsueh-Yi Lee
Abstract: A buffer circuit includes a first transistor, a second transistor, a feed-forward circuit and a resistive bias circuit. The first transistor has a first terminal, a second terminal and a third terminal, wherein the first terminal of the first transistor is served as an input terminal of the buffer circuit. The second transistor has a first terminal and a second terminal, wherein the second terminal of the second transistor is coupled to the third terminal of the first transistor and served as an output terminal of the buffer circuit. The feed-forward circuit has a first terminal and a second terminal respectively coupled to the first terminal of the second transistor and the second terminal of the first transistor. The resistive bias circuit has a first terminal and a second terminal respectively coupled to the second terminal of the first transistor and the first terminal of the feed-forward circuit.
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公开(公告)号：US10355679B2
公开(公告)日：2019-07-16
申请号：US15828618
申请日：2017-12-01
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Chien-Chuan Huang , Chia-Hsin Tung , Chun-Hung Chen , Hao-Jan Yang , Chieh-Hsiang Chang
Abstract: A display driving circuit, a calibration module, and an associated calibration method are provided. The display driving circuit includes an internal clock circuit and the calibration module. The internal clock circuit generates an internal clock signal. The calibration module includes a counting circuit and a trimming circuit. The counting circuit counts pulses of a reference clock signal to generate a detected reference-clock count and counts pulses of the internal clock signal to generate a detected internal-clock count. The trimming circuit generates a calibration signal to adjust frequency of the internal clock signal when a predefined condition is satisfied. The predefined condition is related to comparison between a first preset count and one of the detected reference-clock count and the detected internal-clock count.
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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
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.
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20.发明授权公开(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
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.
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