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公开(公告)号：US20180364857A1
公开(公告)日：2018-12-20
申请号：US16049823
申请日：2018-07-31
Applicant: NOVATEK Microelectronics Corp.
Inventor： Chih-Chang Lai , Chih-Yuan Chang
IPC: G06F3/041
CPC classification number: G06F3/0416 , G06F3/044
Abstract: A touch sensor system includes a touch panel, at least one multiplexer and a touch controller. The touch panel includes one or more touch sensing areas. The at least one multiplexer is coupled to the one or more touch sensing areas through one or more connecting wire groups on the touch panel, wherein each of the connecting wire groups includes one or more connecting wires. The touch controller is coupled to the at least one multiplexer via one or more touch control wires and one or more touch sensing wires. Each of the at least one multiplexer includes one or more switch groups each coupled between one of the one or more touch sensing wires and one of the connecting wire groups, and each of the switch groups includes one or more switches respectively controlled by one or more control signals transmitted through the one or more touch control wires.
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公开(公告)号：US20140368223A1
公开(公告)日：2014-12-18
申请号：US14474296
申请日：2014-09-01
Applicant: NOVATEK Microelectronics Corp.
Inventor： He-Wei Huang , Chun-Hung Chen , Chih-Yuan Chang
IPC: G01R27/26
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.
Abstract translation: 用于测量测量电容器的电容的电容测量装置包括用于对测量的电容器进行充电的充电控制单元; 放电控制单元，用于对测量的电容器进行放电; 耦合到测量的电容器的电压转换电路，用于将测量的电容器上的电压信号转换成表示测量的电容器的电容的值; 其中，在第一时段中，所述充电控制单元和所述放电控制单元之一对所测量的电容器进行充电/放电，并且在所述第一时段之后的第二时段中，所述充电控制单元和所述放电控制单元中的另一个对所述电容器进行放电/充电 测量电容。
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公开(公告)号：US12113532B2
公开(公告)日：2024-10-08
申请号：US18091381
申请日：2022-12-30
Applicant: Novatek Microelectronics Corp.
Inventor： Chih-Yuan Chang , Yu-Te Liao , Wei Cheng Liu
Abstract: Pseudo resistor having an auto-tune function automatically calibrates resistance of the pseudo resistor and compensates for DC drift based on an output signal of an electrical circuit to which the pseudo resistor is coupled, as to mitigate signal phenomenon in the output signal caused by PVT variation. The pseudo resistor includes first transistor, second transistor, and adder. The first terminal of the second transistor is coupled to the first terminal of the first transistor and forms a first common node. The control terminal of the first transistor is coupled to the control terminal of the second transistor and forms second common node. The adder is coupled between the first and second common nodes and configured to receive adjustment voltage for generating a bias voltage for controlling the first and second transistors, where the adjustment voltage corresponds to the output signal coupled to the second terminal of the second transistor.
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公开(公告)号：US11250232B2
公开(公告)日：2022-02-15
申请号：US16789448
申请日：2020-02-13
Applicant: NOVATEK Microelectronics Corp.
Inventor： Hung-Kai Chen , Ting-Hsuan Hung , Chih-Yuan Chang , Feng-Lin Chan
IPC: G06K9/00
Abstract: A fingerprint detecting system comprises a fingerprint module, for receiving a fingerprint driving signal and performing a frequency modulation on the fingerprint driving signal, to correspondingly outputting a fingerprint signal with a first frequency based on the fingerprint driving signal, and a signal processing circuit, coupled to the fingerprint module, for receiving the fingerprint signal with the first frequency, performing a frequency demodulation to shift the first frequency of the fingerprint signal to a second frequency, and filtering the fingerprint signal with the second frequency based on the first frequency, whereby the filtered fingerprint signal is used for a fingerprint data analysis.
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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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Patent Agency Ranking
公开(公告)号：US09389738B2
公开(公告)日：2016-07-12
申请号：US14056975
申请日：2013-10-18
Applicant: Novatek Microelectronics Corp.
Inventor： Chih-Yuan Chang , Chih-Peng Hsia , Hui-Hung Chang
CPC classification number: G06F3/044 , G06F3/0418
Abstract: A touching apparatus and a touching detecting method thereof are provided. The touching detecting method is adapted for a touch panel. The touch panel has a plurality of touching rows and a plurality of touching columns. The touching detecting method includes: performing a mutual-capacitor touching detection and a self-capacitor touching detection alternatingly to the touch panel for obtaining a mutual-capacitor detection result and a self-capacitor detection result, respectively; and obtaining position information of at least one touch point on the touch panel by an operation based on the mutual-capacitor detection result and the self-capacitor detection result.
Abstract translation: 提供一种触摸装置及其触摸检测方法。 触摸检测方法适用于触摸面板。 触摸面板具有多个触摸行和多个触摸列。 触摸检测方法包括：分别对触摸面板交替地执行互电容器触摸检测和自身电容器触摸检测，以分别获得互电容器检测结果和自身电容器检测结果; 以及通过基于所述互电容检测结果和所述自身电容检测结果的操作来获取所述触摸面板上的至少一个触摸点的位置信息。
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公开(公告)号：US20140267146A1
公开(公告)日：2014-09-18
申请号：US14056975
申请日：2013-10-18
Applicant: Novatek Microelectronics Corp.
Inventor： Chih-Yuan Chang , Chih-Peng Hsia , Hui-Hung Chang
IPC: G06F3/044
CPC classification number: G06F3/044 , G06F3/0418
Abstract: A touching apparatus and a touching detecting method thereof are provided. The touching detecting method is adapted for a touch panel. The touch panel has a plurality of touching rows and a plurality of touching columns. The touching detecting method includes: performing a mutual-capacitor touching detection and a self-capacitor touching detection alternatively to the touch panel for obtaining a mutual-capacitor detection result and a self-capacitor detection result, respectively; and obtaining position information of at least one touch point on the touch panel by an operation based on the mutual-capacitor detection result and the self-capacitor detection result.
Abstract translation: 提供一种触摸装置及其触摸检测方法。 触摸检测方法适用于触摸面板。 触摸面板具有多个触摸行和多个触摸列。 触摸检测方法包括：分别对触摸面板进行互电容器触摸检测和自电容器触摸检测，以分别获得互电容器检测结果和自身电容器检测结果; 以及通过基于所述互电容检测结果和所述自身电容检测结果的操作来获取所述触摸面板上的至少一个触摸点的位置信息。
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公开(公告)号：US20240223161A1
公开(公告)日：2024-07-04
申请号：US18091381
申请日：2022-12-30
Applicant: Novatek Microelectronics Corp.
Inventor： Chih-Yuan Chang , Yu-Te Liao , Wei Cheng Liu
Abstract: Pseudo resistor having an auto-tune function automatically calibrates resistance of the pseudo resistor and compensates for DC drift based on an output signal of an electrical circuit to which the pseudo resistor is coupled, as to mitigate signal phenomenon in the output signal caused by PVT variation. The pseudo resistor includes first transistor, second transistor, and adder. The first terminal of the second transistor is coupled to the first terminal of the first transistor and forms a first common node. The control terminal of the first transistor is coupled to the control terminal of the second transistor and forms second common node. The adder is coupled between the first and second common nodes and configured to receive adjustment voltage for generating a bias voltage for controlling the first and second transistors, where the adjustment voltage corresponds to the output signal coupled to the second terminal of the second transistor.
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公开(公告)号：US11190198B1
公开(公告)日：2021-11-30
申请号：US16953311
申请日：2020-11-19
Applicant: NOVATEK Microelectronics Corp.
Inventor： Guan-Ying Huang , Chih-Yuan Chang
Abstract: A switched capacitor circuit includes an output capacitor, a first transmission switch, a first reference buffer, a second transmission switch, a second reference buffer and a charge compensation circuit. The output capacitor includes a first terminal and a second terminal, wherein the first terminal is coupled to an output terminal of the switched capacitor circuit, and the second terminal is coupled to a reference node. The first transmission switch is coupled to the reference node. The first reference buffer is coupled to the first transmission switch. The second transmission switch is coupled to the reference node. The second reference buffer is coupled to the second transmission switch. The charge compensation circuit is coupled to the reference node.
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公开(公告)号：US20210090498A1
公开(公告)日：2021-03-25
申请号：US16576776
申请日：2019-09-20
Applicant: Novatek Microelectronics Corp.
Inventor： Chih-Yuan Chang , Feng-Lin Chan
IPC: G09G3/3233 , H03F3/393
Abstract: A sensing circuit of a display device is provided. The sensing circuit includes a chopper circuit, a first operational amplifier and a filter. The chopper circuit is configured to receive a sensing input signal of the display device and modulate the sensing input signal. The first operational amplifier is coupled to the chopper circuit. The first operational amplifier is configured to receive the modulated sensing input signal and output the modulated sensing input signal to the chopper circuit. The chopper circuit is further configured to demodulate the modulated sensing input signal from the first operational amplifier and output the demodulated sensing input signal. The filter is coupled to the chopper circuit. The filter is configured to filter the demodulated sensing input signal from the chopper circuit and output the filtered sensing input signal as a sensing output signal. A source driver including the sensing circuit is also provided.
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