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公开(公告)号：US20240264681A1
公开(公告)日：2024-08-08
申请号：US18105884
申请日：2023-02-06
Applicant: NOVATEK Microelectronics Corp.
Inventor： Hsin-Hong Yang , Yen-Cheng Cheng
IPC: G06F3/0354 , G06F3/041
CPC classification number: G06F3/03545 , G06F3/0412
Abstract: A sensing circuit, which is to be coupled to a plurality of sensor pads, includes a plurality of front-end circuits and a plurality of switches. The plurality of switches include first to sixth switches. The first switch is coupled between a first sensor pad and a first front-end circuit. The second switch is coupled between the first sensor pad and the first front-end circuit. The third switch is coupled between a second sensor pad and the first front-end circuit. The fourth switch is coupled between the second sensor pad and a second front-end circuit. The fifth switch is coupled between a third sensor pad and the second front-end circuit. The sixth switch is coupled between the third sensor pad and the second front-end circuit. Wherein, the first sensor pad, the second sensor pad, and the third sensor pad are deployed along a first direction.
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公开(公告)号：US11025253B2
公开(公告)日：2021-06-01
申请号：US16583220
申请日：2019-09-25
Applicant: NOVATEK Microelectronics Corp.
Inventor： Hsin-Hong Yang , Yen-Cheng Cheng
IPC: H03F1/07 , H03K19/0185 , H03F1/02 , H03K17/687 , H03F3/45
Abstract: An output stage circuit includes a first operational amplifier, a second operational amplifier, a switch circuit, a clamp circuit and at least one pull-low transistor. The first operational amplifier is operated in a first voltage domain. The second operational amplifier is operated in a second voltage domain. The switch circuit is coupled to the first operational amplifier and the second operational amplifier. The clamp circuit is coupled between the switch circuit and a plurality of output terminals of the output stage circuit. The at least one pull-low transistor is coupled to the switch circuit.
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公开(公告)号：US10977973B1
公开(公告)日：2021-04-13
申请号：US16582097
申请日：2019-09-25
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Yen-Cheng Cheng , Hsiu-Hui Yang
Abstract: A display device and a detection method applied to the display device are provided. The display device includes a display panel, a source control circuit, and a leakage estimation circuit. The display panel includes pixels being arranged in M columns, wherein at least one panel-partition is defined on the display panel. The source control circuit includes M source drivers which respectively provide data voltages to the M columns of pixels. The leakage estimation circuit includes an evaluation circuit, a defect detection circuit, and a mode-switch. The evaluation circuit controls the defect detection circuit to perform a leakage estimation procedure so that a leakage current corresponding to the panel-partition is estimated when the at least one mode-switch is turned on.
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公开(公告)号：US20200343892A1
公开(公告)日：2020-10-29
申请号：US16583220
申请日：2019-09-25
Applicant: NOVATEK Microelectronics Corp.
Inventor： Hsin-Hong Yang , Yen-Cheng Cheng
IPC: H03K19/0185 , H03F3/45 , H03K17/687 , H03F1/02
Abstract: An output stage circuit includes a first operational amplifier, a second operational amplifier, a switch circuit, a clamp circuit and at least one pull-low transistor. The first operational amplifier is operated in a first voltage domain. The second operational amplifier is operated in a second voltage domain. The switch circuit is coupled to the first operational amplifier and the second operational amplifier. The clamp circuit is coupled between the switch circuit and a plurality of output terminals of the output stage circuit. The at least one pull-low transistor is coupled to the switch circuit.
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公开(公告)号：US12045399B1
公开(公告)日：2024-07-23
申请号：US18105884
申请日：2023-02-06
Applicant: NOVATEK Microelectronics Corp.
Inventor： Hsin-Hong Yang , Yen-Cheng Cheng
IPC: G06F3/041 , G06F3/0354
CPC classification number: G06F3/03545 , G06F3/0412
Abstract: A sensing circuit, which is to be coupled to a plurality of sensor pads, includes a plurality of front-end circuits and a plurality of switches. The plurality of switches include first to sixth switches. The first switch is coupled between a first sensor pad and a first front-end circuit. The second switch is coupled between the first sensor pad and the first front-end circuit. The third switch is coupled between a second sensor pad and the first front-end circuit. The fourth switch is coupled between the second sensor pad and a second front-end circuit. The fifth switch is coupled between a third sensor pad and the second front-end circuit. The sixth switch is coupled between the third sensor pad and the second front-end circuit. Wherein, the first sensor pad, the second sensor pad, and the third sensor pad are deployed along a first direction.
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Patent Agency Ranking
公开(公告)号：US11942015B2
公开(公告)日：2024-03-26
申请号：US17506662
申请日：2021-10-20
Applicant: Novatek Microelectronics Corp.
Inventor： Yen-Cheng Cheng , Hsiu-Hui Yang
IPC: G09G3/20
CPC classification number: G09G3/2074 , G09G2310/0297 , G09G2320/0276 , G09G2320/0673
Abstract: A source driver, including a plurality of channel circuits, each of the plurality of channel circuits 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：US11646707B2
公开(公告)日：2023-05-09
申请号：US17183310
申请日：2021-02-23
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Yen-Cheng Cheng
CPC classification number: H03F3/45475 , H03F2200/129
Abstract: An analog front end circuit with pulse width modulation current compensation comprises sensing a current condition and determining if the current condition is a positive or negative current condition. An appropriate control signal is determined according to the current condition and sent to turn on a positive current electronic switch if the current condition is a negative current condition or sent to turn on a negative current electronic switch if the current condition is a positive current condition. A positive compensation current flows to offset negative parasitic current when the positive current electronic switch is turned on and a negative compensation current flows to offset positive parasitic current when the negative current electronic switch is turned on. A master control unit utilizes pulse width modulation signals of various widths associated with various current conditions to be sent to turn on the positive electronic switch or the negative electronic switch.
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公开(公告)号：US11625121B2
公开(公告)日：2023-04-11
申请号：US17693403
申请日：2022-03-13
Applicant: NOVATEK Microelectronics Corp.
Inventor： Yen-Cheng Cheng , Shih-Chan Huang
IPC: G06F3/041 , G06F3/044 , H04W72/04 , G06F3/038 , G06F3/0354
Abstract: A detection method for a touch device includes transmitting a first uplink signal conforming to a first protocol of a first active stylus and transmitting a second uplink signal conforming to a second protocol of a second active stylus. A chronological sequence of the first uplink signal and the second uplink signal is based at least in part on whether the first active stylus or the second active stylus has just left a detection range of the touch device.
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公开(公告)号：US20220179511A1
公开(公告)日：2022-06-09
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：US10991290B1
公开(公告)日：2021-04-27
申请号：US17064640
申请日：2020-10-07
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Hsiu-Hui Yang , Yu-Shao Liu , Chin-Hung Hsu , Yen-Cheng Cheng
IPC: G09G3/20
Abstract: Control methods of a channel setting module applied to a display panel are provided. The display panel has gate lines, source lines, and pixels. The pixels are arranged in matrix. The pixels disposed at the same row are electrically connected to the same gate line, and the pixels disposed at the same column are electrically connected to the same source line. The adoption of the channel setting module reduces the control signals required by the source lines. The channel setting module includes operational amplifiers and de-mux switches, and the control methods dynamically determine conduction states of the de-mux switches. The voltage outputs of the operational amplifiers are selectively outputted to the source lines, depending on conduction statuses of the de-mux switches. By applying the control methods, the interference between the source lines are reduced, and the instantaneous overshoots/undershoots of floating channels are depressed.
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