Patents by Inventor Jhih-Siou Cheng

Jhih-Siou Cheng has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10777146
    Abstract: A source driver including a sensing circuit and an operational amplifier is provided. The sensing circuit senses pixel information of an organic light-emitting diode (OLED) pixel circuit. The operational amplifier includes an amplifier circuit and an offset voltage storing and reducing circuit. An input terminal of the amplifier circuit is coupled to the sensing circuit. The amplifier circuit includes a first gain circuit and a second gain circuit. An output terminal of the offset voltage storing and reducing circuit is coupled to a coupling terminal of the first gain circuit. An input terminal of the offset voltage storing and reducing circuit is coupled to an output terminal of the second gain circuit. The offset voltage storing and reducing circuit stores and reduces an offset voltage of the first gain circuit.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: September 15, 2020
    Assignee: Novatek Microelectronics Corp.
    Inventors: Chih-Hsien Chou, Po-Yu Tseng, Jhih-Siou Cheng, Jin-Yi Lin
  • Patent number: 10770011
    Abstract: A buffer circuit, a display module, and a display driving method are disclosed. The buffer circuit comprises a first polarity buffer, a negative polarity buffer. The first polarity buffer receives a first supply voltage and a second supply voltage to output a first reference voltage to a first resistance string. The second supply voltage is less than the first supply voltage. The negative polarity buffer receives the second supply voltage and a third supply voltage to output a negative reference voltage to a negative resistance string. The third supply voltage is less than the second supply voltage.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: September 8, 2020
    Assignee: NOVATEK MICROELECTRONICS CORP.
    Inventors: Chieh-An Lin, Chun-Yung Cho, Jhih-Siou Cheng
  • Patent number: 10762846
    Abstract: A driver of a display panel is provided. The driver includes a plurality of sensing channels and a signal convertor. The plurality of sensing channels are configured to receive a plurality of sensing signals from the display panel via a plurality of sensing lines and output the sensing signals. The signal convertor is coupled to the sensing channels and configured to receive the sensing signals from the sensing channels. The signal convertor receives the sensing signals from the sensing channels in different sequences during different sensing periods.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: September 1, 2020
    Assignee: Novatek Microelectronics Corp.
    Inventors: Jhih-Siou Cheng, Tzong-Honge Shieh, Chieh-An Lin, Ju-Lin Huang
  • Publication number: 20200234636
    Abstract: A sensing circuit for an organic light-emitting diode driver includes a sample and hold circuit and a gain amplifier. The sample and hold circuit is configured to sample a sensing signal received via an input terminal. The gain amplifier is coupled to the sample and hold circuit. The sample and hold circuit includes a first capacitor, a second capacitor, a first switch, a second switch, a third switch and a fourth switch. The first capacitor is coupled between the input terminal and the gain amplifier. The second capacitor is coupled between a reference terminal and the gain amplifier. The first switch is connected between the first capacitor and the input terminal. The second switch is connected between the second capacitor and the reference terminal. The third switch is connected between the first capacitor and the gain amplifier. The fourth switch is connected between the second capacitor and the gain amplifier.
    Type: Application
    Filed: January 21, 2019
    Publication date: July 23, 2020
    Inventors: Jin-Yi Lin, Chieh-An Lin, Jhih-Siou Cheng, Ju-Lin Huang
  • Publication number: 20200226981
    Abstract: A driver of a display panel is provided. The driver includes a plurality of sensing channels configured to receive a plurality of sensing signals from the display panel via a plurality of sensing lines and output the sensing signals, the sensing channels are coupled to the sensing lines in an arrangement selected from one of a random arrangement and a normal arrangement. The driver further includes a signal convertor coupled to the sensing channels and configured to receive the sensing signals from the sensing channels in a sequence selected from one of a random sequence and a normal sequence.
    Type: Application
    Filed: March 26, 2020
    Publication date: July 16, 2020
    Applicant: Novatek Microelectronics Corp.
    Inventors: Jhih-Siou Cheng, Tzong-Honge Shieh, Ju-Lin Huang
  • Publication number: 20200220350
    Abstract: The present invention provides an output circuit with electrostatic discharge (ESD) protection in a semiconductor chip of a source driver. The source driver is configured to drive a display panel. The output circuit includes an output buffer, an output pad, a switch and a first resistor. The switch is coupled between the output buffer and the output pad, wherein data voltages for driving the display panel are transmitted from the output buffer to the output pad via the switch. The switch includes a first metal oxide semiconductor (MOS) transistor, which includes a first terminal coupled to the output pad, a bulk terminal and a gate terminal. The first resistor is coupled between the bulk terminal of the first MOS transistor and a first power supply terminal.
    Type: Application
    Filed: March 17, 2020
    Publication date: July 9, 2020
    Inventors: Jhih-Siou Cheng, Ju-Lin Huang, Chia-En Wu
  • Publication number: 20200211472
    Abstract: The differential difference amplifier circuit includes a differential input stage circuit, a loading stage circuit coupled to the differential input stage circuit, and an output stage circuit coupled to the loading stage circuit. The output stage circuit is configured to generate an output signal. The differential input stage circuit includes a first differential pair having a first transconductance and a second differential pair having a second transconductance. The first differential pair is biased by a first current source and receives a first input signal and the output signal. The second differential pair is biased by a second current source and receives a second input signal and the output signal. At least one of the first transconductance and the second transconductance is adjusted according to the image data.
    Type: Application
    Filed: March 11, 2020
    Publication date: July 2, 2020
    Inventors: Chih-Hsien CHOU, Po-Yu TSENG, Jhih-Siou CHENG
  • Publication number: 20200202767
    Abstract: An electronic device for driving a display panel and an operation method thereof are provided. The electronic device includes a first input terminal, a first circuit and a second circuit. The first input terminal receives a first sensing signal from a first sensing line of the sensing lines of the display panel. The first circuit generates a first signal according to the first sensing signal and provides a processing circuit with the first signal during a pre-processing period. The second circuit generates a second signal according to the first sensing signal and provides the processing circuit with the second signal during a normal processing period after the pre-processing period.
    Type: Application
    Filed: March 4, 2020
    Publication date: June 25, 2020
    Applicant: Novatek Microelectronics Corp.
    Inventors: Po-Hsiang Fang, Jhih-Siou Cheng
  • Publication number: 20200202776
    Abstract: A display apparatus and a method for noise reduction are introduced. The method comprises steps of sensing a first pixel signal being superimposed by noises from a first pixel through a first sensing line in a first phase of a sensing operation and sensing a first noise signal from the first sensing line in a second phase of the sensing operation. The method further comprises steps of sensing a second noise signal from a second sensing line in the first phase of the sensing operation, and sensing a third noise signal from the second sensing line in the second phase of the sensing operation. The method further removes the noises that are superimposed to the first pixel signal according to a difference between the first pixel signal and the first noise signal and a difference between the second noise signal and the third noise signal to generate a denoised sensing value of the first pixel.
    Type: Application
    Filed: June 2, 2019
    Publication date: June 25, 2020
    Applicant: Novatek Microelectronics Corp.
    Inventors: Keko-Chun Liang, Yu-Hsiang Wang, Jhih-Siou Cheng, Yi-Chuan Liu, Ju-Lin Huang
  • Publication number: 20200204743
    Abstract: A video transmission system is disclosed. The video transmission system comprises a multi-drop bus, a first source driving chip, a second source driving chip and a timing controller. The first source driving chip comprises a first source driving circuit and a first terminal circuit. The first terminal circuit is coupled to the multi-drop bus and the first source driving circuit for providing a first terminal resistor. The second source driving chip comprises a second source driving circuit and a second terminal circuit. The second terminal circuit is coupled to the multi-drop bus and the second source driving circuit for providing a second terminal resistor. The timing controller is coupled to the first source driving chip and the second source driving chip via the multi-drop bus.
    Type: Application
    Filed: March 3, 2020
    Publication date: June 25, 2020
    Applicant: NOVATEK MICROELECTRONICS CORP.
    Inventors: Jhih-Siou CHENG, Yi-Chuan LIU, Hung-Cheng HSIAO, Ying-Wen CHOU
  • Publication number: 20200184870
    Abstract: A source driver is provided. The source driver includes an integrated circuit chip, a sensitive circuit and at least one bump. The sensitive circuit is disposed in the integrated circuit chip. The sensitive circuit includes at least one capacitor. The at least one bump is disposed in the integrated circuit chip, and the at least one bump is adjacent to the sensitive circuit.
    Type: Application
    Filed: June 19, 2019
    Publication date: June 11, 2020
    Applicant: Novatek Microelectronics Corp.
    Inventors: Po-Hsiang Fang, Jhih-Siou Cheng, Wen-Ching Huang
  • Publication number: 20200184869
    Abstract: A source driver and an operating method thereof are provided. The source driver includes a high voltage circuit, a low voltage circuit and a sensing circuit. The low voltage circuit is coupled to the high voltage circuit. The high voltage circuit and low voltage circuit drive a display panel. The sensing circuit is coupled to the low voltage circuit. The sensing circuit senses the display panel during an analog-to-digital operating period. At least one of the high voltage circuit and the low voltage circuit is disabled during at least part of the analog-to-digital operating period.
    Type: Application
    Filed: June 2, 2019
    Publication date: June 11, 2020
    Applicant: Novatek Microelectronics Corp.
    Inventors: Po-Hsiang Fang, Jhih-Siou Cheng, Ju-Lin Huang
  • Patent number: 10673391
    Abstract: An operational amplifier circuit is provided. The operational amplifier circuit includes a differential input stage circuit and a loading stage circuit. The differential input stage circuit includes an input circuit, a voltage maintaining circuit, and a current source. The input circuit includes a first input transistor and a second input transistor, for receiving a first and a second input signals, respectively. The voltage maintaining circuit includes a first branch circuit and a second branch circuit. The first branch circuit is coupled to the first input transistor for receiving the first input signal, and the second branch circuit is coupled to the second input transistor for receiving the second input signal. The current source is coupled to the first input transistor and the second input transistor. The loading stage circuit is coupled to the voltage maintaining circuit.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: June 2, 2020
    Assignee: NOVATEK MICROELECTRONICS CORP.
    Inventors: Chih-Wen Lu, Chih-Hsien Chou, Po-Yu Tseng, Jhih-Siou Cheng
  • Patent number: 10673397
    Abstract: An operational amplifier includes an output node; an output stage, comprising a plurality of output current paths and a plurality of control nodes, wherein the plurality of control nodes are respectively coupled to the plurality of output current paths, and the plurality of output current paths are coupled to the output node and respectively coupled to a plurality of power supply sources providing different voltages; and a selecting unit, configured to couple an internal output node of the operational amplifier to one of the plurality of control nodes of the output stage.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: June 2, 2020
    Assignee: NOVATEK Microelectronics Corp.
    Inventors: Jhih-Siou Cheng, Tzong-Honge Shieh
  • Publication number: 20200168154
    Abstract: A sensing circuit for an organic light-emitting diode (OLED) driver includes a sample and hold circuit and a clamping circuit. The sample and hold circuit includes a capacitor. The clamping circuit, coupled to the sample and hold circuit, is configured to clamp a sensing voltage received by the sample and hold circuit to conform to a withstand voltage of the capacitor.
    Type: Application
    Filed: November 22, 2018
    Publication date: May 28, 2020
    Inventors: Jhih-Siou Cheng, Po-Yu Tseng, Keko-Chun Liang, Ju-Lin Huang, Chih-Hsien Chou
  • Patent number: 10643543
    Abstract: A driver of a display panel is provided. The driver includes a plurality of sensing channels configured to receive a plurality of sensing signals from the display panel via a plurality of sensing lines and output the sensing signals, the sensing channels are coupled to the sensing lines in an arrangement selected from one of a random arrangement and a normal arrangement. The driver further includes a signal convertor coupled to the sensing channels and configured to receive the sensing signals from the sensing channels in a sequence selected from one of a random sequence and a normal sequence.
    Type: Grant
    Filed: September 3, 2018
    Date of Patent: May 5, 2020
    Assignee: Novatek Microelectronics Corp.
    Inventors: Jhih-Siou Cheng, Tzong-Honge Shieh, Ju-Lin Huang
  • Patent number: 10636346
    Abstract: An electronic device for driving a display panel and an operation method thereof are provided. The electronic device includes a sensing circuit, a dummy sensing circuit, a multiplexer circuit and a processing circuit. The sensing circuit senses a sensing line of the display panel to output a sensing result. The dummy sensing circuit senses a dummy signal to output a dummy sensing result, wherein the dummy signal is related to a part of or all of signals of the sensing line. The multiplexer circuit time-divisionally outputs the dummy sensing result and the sensing result. The processing circuit is coupled to an output terminal of the multiplexer circuit to time-divisionally receive the dummy sensing result and the sensing result.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: April 28, 2020
    Assignee: Novatek Microelectronics Corp.
    Inventors: Po-Hsiang Fang, Jhih-Siou Cheng
  • Patent number: 10637235
    Abstract: An output circuit with electrostatic discharge (ESD) protection in a semiconductor chip includes a first metal oxide semiconductor (MOS) transistor and a first resistor. The first MOS transistor includes a first terminal coupled to an output pad of the semiconductor chip, a bulk terminal and a gate terminal. The first resistor is coupled between the bulk terminal of the first MOS transistor and a first power supply terminal.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: April 28, 2020
    Assignee: NOVATEK Microelectronics Corp.
    Inventors: Jhih-Siou Cheng, Ju-Lin Huang, Chia-En Wu
  • Patent number: 10616505
    Abstract: A video transmission system is disclosed. The video transmission system comprises a multi-drop bus, a first source driving chip, a second source driving chip and a timing controller. The first source driving chip comprises a first source driving circuit and a first terminal circuit. The first terminal circuit is coupled to the multi-drop bus and the first source driving circuit for providing a first terminal resistor. The second source driving chip comprises a second source driving circuit and a second terminal circuit. The second terminal circuit is coupled to the multi-drop bus and the second source driving circuit for providing a second terminal resistor. The timing controller is coupled to the first source driving chip and the second source driving chip via the multi-drop bus.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: April 7, 2020
    Assignee: NOVATEK MICROELECTRONICS CORP.
    Inventors: Jhih-Siou Cheng, Yi-Chuan Liu, Hung-Cheng Hsiao, Ying-Wen Chou
  • Publication number: 20200020283
    Abstract: A source driver including a sensing circuit and an operational amplifier is provided. The sensing circuit senses pixel information of an organic light-emitting diode (OLED) pixel circuit. The operational amplifier includes an amplifier circuit and an offset voltage storing and reducing circuit. An input terminal of the amplifier circuit is coupled to the sensing circuit. The amplifier circuit includes a first gain circuit and a second gain circuit. An output terminal of the offset voltage storing and reducing circuit is coupled to a coupling terminal of the first gain circuit. An input terminal of the offset voltage storing and reducing circuit is coupled to an output terminal of the second gain circuit. The offset voltage storing and reducing circuit stores and reduces an offset voltage of the first gain circuit.
    Type: Application
    Filed: July 16, 2019
    Publication date: January 16, 2020
    Applicant: Novatek Microelectronics Corp.
    Inventors: Chih-Hsien Chou, Po-Yu Tseng, Jhih-Siou Cheng, Jin-Yi Lin