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公开(公告)号：US20200027387A1
公开(公告)日：2020-01-23
申请号：US16517674
申请日：2019-07-22
Applicant: Novatek Microelectronics Corp.
Inventor： Yen-Cheng Cheng , Hsiu-Hui Yang
IPC: G09G3/20
Abstract: A channel circuit of a source driver, including a first digital-to-analog converter (DAC), a second DAC, a first switch, a second switch and an output buffer circuit, is provided. The output terminal of the output buffer circuit is configured to be coupled to a data line of a display panel. An output terminal of the first DAC is coupled to a first input terminal among the input terminals of the output buffer circuit. An output terminal of the second DAC is coupled to a second input terminal among the input terminals of the output buffer circuit. The first switch is disposed along a first signal path between the output terminal of the first DAC and the output terminal of the output buffer circuit. The second switch is disposed along a second signal path between the output terminal of the second DAC and the output terminal of the output buffer circuit.
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公开(公告)号：US11630540B2
公开(公告)日：2023-04-18
申请号：US17676856
申请日：2022-02-22
Applicant: Novatek Microelectronics Corp.
Inventor： Yen-Cheng Cheng
Abstract: The disclosure includes a touch display apparatus having AFE circuit that performs a noise cancellation of an AFE channel by utilizing noise signal received by a neighboring AFE channels. The first AFE channel includes a first integrator having an input terminal coupled to the first terminal receiving a first sensing signal. The second AFE channel includes an input amplifier. The second AFE channel is coupled between the input terminal of the first integrator in the first AFE channel and a second terminal connected to the touch panel. The second AFE channel is configured to generate a reversal input signal based on a second sensing signal received by the second terminal and couple the reversal input signal to a common node between the first integrator and the first terminal.
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公开(公告)号：US11366544B2
公开(公告)日：2022-06-21
申请号：US16882740
申请日：2020-05-25
Applicant: Novatek Microelectronics Corp.
Inventor： Yen-Cheng Cheng
Abstract: A driver chip including a receiving structure, a shielding structure, and a touch control circuit is provided. The receiving structure can receive a touch sensing signal. The shielding structure can be disposed aside the receiving structure. The shielding structure can shield at least one parasitic capacitor coupled to the receiving structure. The touch control circuit can be connected to the receiving structure and configured to receive the touch sensing signal. An electronic device including a driver chip is also provided.
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公开(公告)号：US20210191539A1
公开(公告)日：2021-06-24
申请号：US17126049
申请日：2020-12-18
Applicant: Novatek Microelectronics Corp.
Inventor： Yen-Cheng Cheng
Abstract: The disclosure includes a touch display apparatus having AFE circuit that performs a noise cancellation of an AFE channel by utilizing noise signal received by a neighboring AFE channels. The first AFE channel includes a first integrator having an input terminal coupled to the first terminal receiving a first sensing signal. The second AFE channel includes an input amplifier. The second AFE channel is coupled between the input terminal of the first integrator in the first AFE channel and a second terminal connected to the touch panel. The second AFE channel is configured to generate a reversal input signal based on a second sensing signal received by the second terminal and couple the reversal input signal to a common node between the first integrator and the first terminal.
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公开(公告)号：US10418998B1
公开(公告)日：2019-09-17
申请号：US16121638
申请日：2018-09-05
Applicant: Novatek Microelectronics Corp.
Inventor： Yen-Cheng Cheng
IPC: H03K19/0185 , H03K3/356
Abstract: A level shifter circuit which includes a cross-coupled latch and a set-reset latch is introduced. The level shifter circuit includes a first input node, a second input node and a plurality of switches. The first input node and the second input node are configured to receive a first digital input signal and a second digital input signal, respectively. The plurality of switches are configured to be switched on or off according to at least one control signal to output a first output signal and a second output signal. The set-reset latch is coupled to the cross-coupled latch and includes a set input node, a reset input node and an output node. The set input node and the reset input node are configured to receive the first output signal and the second output signal of the cross-coupled latch, respectively. The output node outputs a level-shifted output signal according to the first output signal and the second output signal of the cross-coupled latch. A method adapted to a level shifter circuit is also introduced.
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Patent Agency Ranking
公开(公告)号：US10367504B1
公开(公告)日：2019-07-30
申请号：US16116877
申请日：2018-08-29
Applicant: NOVATEK Microelectronics Corp.
Inventor： Yen-Cheng Cheng
IPC: H03K19/00 , H03K19/0185
Abstract: A negative voltage level shifter includes a pair of input transistors, a pair of output transistors and a clamp circuit. The clamp circuit is coupled between the pair of input transistors and the pair of output transistors, for clamping source voltages of the pair of input transistors.
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17.发明授权公开(公告)号：US12032781B1
公开(公告)日：2024-07-09
申请号：US18183893
申请日：2023-03-14
Applicant: Novatek Microelectronics Corp.
Inventor： Yen-Cheng Cheng , Ko Ho Lin , Shih-Chan Huang
IPC: G06F3/041 , G06F3/0354
CPC classification number: G06F3/04166 , G06F3/03545 , G06F3/04162
Abstract: The disclosure provides a touch device and an operation method thereof. A touch panel of the touch device is divided into a plurality of stylus connection areas. During a first discovery period, the stylus connection areas detect a stylus one by one in a first scan order. When the stylus is located in one of the stylus connection areas (a hit area), the first discovery period is ended to enter a normal period, and the hit area establishes a connection to the stylus. When the connection between the stylus and the touch panel is interrupted, the normal period is ended to enter a second discovery period, and the first scan order is adjusted to a second scan order according to the hit area in the normal period. During the second discovery period, the stylus connection areas detect the stylus one by one in the second scan order.
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公开(公告)号：US11386863B2
公开(公告)日：2022-07-12
申请号：US16513723
申请日：2019-07-17
Applicant: NOVATEK Microelectronics Corp.
Inventor： Hsiu-Hui Yang , Yen-Cheng Cheng , Chin-Hung Hsu
Abstract: An output circuit of a driver includes a plurality of output nodes, a first output buffer group and a multiplexer. The first output buffer group is configured to output data to the plurality of output nodes, wherein each output buffer in the first output buffer group is configured to output data to at least two output nodes among the plurality of output nodes. The multiplexer, coupled between the plurality of output nodes and the first output buffer group, is configured to select to couple each output buffer in the first output buffer group to one of the plurality of output nodes.
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公开(公告)号：US11287931B2
公开(公告)日：2022-03-29
申请号：US17126049
申请日：2020-12-18
Applicant: Novatek Microelectronics Corp.
Inventor： Yen-Cheng Cheng
Abstract: The disclosure includes a touch display apparatus having AFE circuit that performs a noise cancellation of an AFE channel by utilizing noise signal received by a neighboring AFE channels. The first AFE channel includes a first integrator having an input terminal coupled to the first terminal receiving a first sensing signal. The second AFE channel includes an input amplifier. The second AFE channel is coupled between the input terminal of the first integrator in the first AFE channel and a second terminal connected to the touch panel. The second AFE channel is configured to generate a reversal input signal based on a second sensing signal received by the second terminal and couple the reversal input signal to a common node between the first integrator and the first terminal.
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公开(公告)号：US11099675B1
公开(公告)日：2021-08-24
申请号：US16856043
申请日：2020-04-23
Applicant: Novatek Microelectronics Corp.
Inventor： Yen-Cheng Cheng , Hsiu-Hui Yang
Abstract: A display device, an operation, a driving circuit and a timing control circuit are provided. The display device includes a touch display panel, the driving circuit and the timing control circuit. The driving circuit drives the touch display panel to display image frames and perform touch detection. The timing control circuit outputs display data to the driving circuit through a data transmission path during a display period to display the image frame on the touch display panel. The driving circuit outputs touch detection data corresponding to the touch detection to the timing control circuit through the same data transmission path during a touch detection period.
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