-
公开(公告)号：US20210203330A1
公开(公告)日：2021-07-01
申请号：US16727882
申请日：2019-12-26
Applicant: NOVATEK Microelectronics Corp.
Inventor： Chin-Tung CHAN
Abstract: A frequency locked loop circuit, including a frequency generation circuit, a first impedance circuit, a second impedance circuit and a switching circuit. The frequency generation circuit includes a positive terminal and a negative terminal. The frequency generation circuit outputs an output clock signal according to a voltage difference between the positive terminal and the negative terminal. The first impedance circuit and the second impedance circuit are electrically coupled to a first impedance node and a second impedance node, respectively. The second impedance circuit adjusts an impedance value of the second impedance circuit according to the output clock signal. The switching circuit is configured to periodically conduct the negative terminal to one of the first impedance node and the second impedance node, and periodically conduct the positive terminal to the other one of the first impedance node and the second impedance node.
-
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.
-
公开(公告)号：US11024242B1
公开(公告)日：2021-06-01
申请号：US16816238
申请日：2020-03-11
Applicant: Novatek Microelectronics Corp.
Inventor： Hui-Feng Lin , Yen-Tao Liao
Abstract: A timing controller and an operation method thereof are provided. The timing controller is used to control a signal timing of a display panel. The timing controller includes an analysis circuit and a decision circuit. The analysis circuit analyzes the content of an image frame to obtain an analysis result. The decision circuit is coupled to the analysis circuit to receive the analysis result. The decision circuit determines a global gray level according to the analysis result. In a blanking interval in which a plurality of sub-pixel circuits of the display panel are turned off, a data voltage corresponding to the global gray level is applied to at least one data line of the display panel corresponding to the sub-pixel circuits.
-
公开(公告)号：US20210158006A1
公开(公告)日：2021-05-27
申请号：US16691627
申请日：2019-11-22
Applicant: Novatek Microelectronics Corp.
Inventor： Min Huang
IPC: G06K9/00
Abstract: An optical fingerprint sensing apparatus and an anti-relative illumination (anti-RI) compensation method thereof are provided. The optical fingerprint sensing apparatus includes an optical fingerprint sensor module and a processing circuit. The optical fingerprint sensor module is configured to capture a fingerprint image frame. The processing circuit is coupled to the optical fingerprint sensor module to receive the fingerprint image frame. The processing circuit obtains an anti-RI gain value corresponding to a current pixel in the fingerprint image frame from a lookup table. The processing circuit compensates an original illumination of the current pixel using the anti-RI gain value to obtain a compensated illumination of the current pixel.
-
公开(公告)号：US11019700B2
公开(公告)日：2021-05-25
申请号：US16387539
申请日：2019-04-18
Applicant: Novatek Microelectronics Corp.
Inventor： Wei-Jen Lai
Abstract: A light-emitting diode driving system including a load, a power supply circuit and a light-emitting diode driving device is provided. The load includes one or more light-emitting diode strings. The power supply circuit outputs an output voltage to drive the load according to a feedback signal. The light-emitting diode driving device includes at least one current source, at least one comparator and a control logic circuit. The current source outputs a current to drive the load. The comparator compares a first voltage from the current source to a reference voltage and outputs a second voltage according to a comparison result. The control logic circuit includes a control node. The control logic circuit receives the second voltage through the control node and converts the second voltage to a control signal to adjust a resistance value of a variable resistor circuit. A light-emitting diode driving device is also provided.
-
Patent Agency Ranking
公开(公告)号：US11015914B2
公开(公告)日：2021-05-25
申请号：US16252739
申请日：2019-01-21
Applicant: Novatek Microelectronics Corp.
Inventor： Chen-Tsung Wu , Ji-Ting Chen
Abstract: A capacitive image sensing device and a capacitive image sensing method are provided. The capacitive image sensing device includes a sensor array, a first charge amplifier, a second charge amplifier, a differential amplifier and a first switching circuit. The sensor array includes a plurality of sensing electrodes and a first reference sensing electrode. An input terminal of the first charge amplifier is coupled to one of the sensing electrodes. A first input terminal of the differential amplifier is selectively coupled to an output terminal of the first charge amplifier. A second input terminal of the differential amplifier is coupled to an output terminal of the second charge amplifier. The first switching circuit is configured to selectively electrically connect and disconnect the first reference sensing electrode and the input terminal of the second charge amplifier.
-
公开(公告)号：US11012039B2
公开(公告)日：2021-05-18
申请号：US16393942
申请日：2019-04-24
Applicant: NOVATEK Microelectronics Corp.
Inventor： Min Huang
Abstract: A signal processing circuit, which has a pair of input nodes and a pair of output nodes, includes a first switch pair, a second switch pair, an amplifier, a first compensation capacitor and a second compensation capacitor. The first switch pair is coupled between the pair of input nodes and a plurality of floating nodes. The second switch pair is coupled between the plurality of floating nodes and the pair of output nodes. The amplifier is coupled between the plurality of floating nodes and the pair of output nodes. The first compensation capacitor is coupled between a first floating node among the plurality of floating nodes and a first output node among the pair of output nodes. The second compensation capacitor is coupled between a second floating node among the plurality of floating nodes and the first output node.
-
公开(公告)号：US11004389B2
公开(公告)日：2021-05-11
申请号：US16526992
申请日：2019-07-30
Applicant: Novatek Microelectronics Corp.
Inventor： Hua-Gang Chang
IPC: G09G3/3233
Abstract: A panel control device and an operation method thereof are provided. The panel control device includes a display port and a control circuit. The display port receives video data from a former stage device. The control circuit performs an anti-burn-in process on the video data according to a processing degree. After the former stage device issues a panel self-refresh entering command to the panel control device, the panel control device enters a panel self-refresh mode, and the control circuit increases the processing degree according to the panel self-refresh entering command, so as to perform the anti-burn-in process on the video data according to the increased processing degree.
-
公开(公告)号：US10999107B1
公开(公告)日：2021-05-04
申请号：US16946250
申请日：2020-06-12
Applicant: Novatek Microelectronics Corp.
Inventor： Shih-Chun Lin , Ming-Hung Chien , Shu-Chin Chuang
Abstract: A voltage mode transmitter includes a first output terminal, a second output terminal, and a plurality switch-resistor units between the first output terminal and a first voltage source, between the second output terminal and the first voltage source, between the first output terminal and a second voltage source, and between the second output terminal and the second voltage source. Each switch-resistor unit includes a switch and a resistor connected in series. The switches of the switch-resistor units are controlled such that a common-mode voltage of a differential signal outputted at the first and second output terminals deviates from an average of voltages provided by the first and second voltage sources.
-
公开(公告)号：US10990219B2
公开(公告)日：2021-04-27
申请号：US16451021
申请日：2019-06-25
Applicant: Novatek Microelectronics Corp.
Inventor： Huan-Teng Cheng , Wen-Yi Hsieh , Huang-Chin Tang
Abstract: An integrated circuit and a touch display apparatus are provided. The integrated circuit is configured to drive a touch display panel. The integrated circuit includes a regulator. An output terminal of the regulator is employed as a first node to output a common voltage, wherein the common voltage is configured to be provided to at least one common electrode of the touch display panel. An input terminal of the regulator is coupled to a second node different from the first node to receive a feedback voltage.
-
-
-
-
-
-
-
-
-
Search Results
2044
records
(took 0.026 seconds)
