Patents by Inventor Chien-Lung Lee

Chien-Lung Lee 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: 12003230
    Abstract: Systems and methods are described herein for controlling a switch. In some embodiments, circuitry may detect a voltage across the switch. A current reference signal may be generated based on the voltage across the switch. The switch may be controlled based, at least in part, on the current reference signal.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: June 4, 2024
    Assignee: MediaTek Inc.
    Inventors: Yun-Yao Hung, Chien-Lung Lee, Shao-Siang Ng, Chun-Yen Tseng
  • Patent number: 11930573
    Abstract: A power supply device is provided. The power supply device includes a power converter and a controller. The controller controls the power converter to generate an output power. The controller includes a first detection circuit and a second detection circuit. The first detection circuit detects the output power to obtain a first detection result. The first detection result is a variation of an output current value of the output power. The second detection circuit detects electrical characteristics other than the output current value to obtain a second detection result. The controller determines whether to limit output of the output power according to a relationship between the first detection result and the second detection result.
    Type: Grant
    Filed: October 5, 2022
    Date of Patent: March 12, 2024
    Assignee: Power Forest Technology Corporation
    Inventors: Rong-Jie Tu, Hung-Chih Chiu, Chien-Lung Lee
  • Patent number: 11791725
    Abstract: The present invention provides a voltage regulator including a voltage control circuit and a current control circuit. The voltage control circuit is configured to receive an output voltage of the voltage regulator to generate a first current to an output terminal of the voltage regulator; and the current control circuit is configured to generate a second current to the output terminal of the voltage regulator according to an output current of the voltage regulator, wherein the output current is generated according to the first current and the second current.
    Type: Grant
    Filed: July 7, 2021
    Date of Patent: October 17, 2023
    Assignee: MEDIATEK INC.
    Inventors: Chien-Lung Lee, Jin-Yan Syu
  • Patent number: 11742743
    Abstract: A switching regulator clamping the power or ground of the power switch driver is introduced. In a buck regulator, the first power switch is coupled between the input terminal of the buck regulator and the first terminal of an inductor. The second terminal of the inductor is coupled to the output terminal of the buck regulator. The second power switch is coupled between the first terminal of the inductor and an internal ground of the buck regulator. There is a driver power clamp configured to clamp the power terminal of the driver of the second power switch when the first power switch is turned off. In a boost regulator, a driver power clamp is configured to clamp the ground terminal of the driver of the power switch that couples the input inductor to an output terminal of the boost regulator when another power switch is turned off.
    Type: Grant
    Filed: November 8, 2022
    Date of Patent: August 29, 2023
    Assignee: MEDIATEK INC.
    Inventors: Chien-Lung Lee, Jin-Yan Syu
  • Publication number: 20230209678
    Abstract: A power supply device is provided. The power supply device includes a power converter and a controller. The controller controls the power converter to generate an output power. The controller includes a first detection circuit and a second detection circuit. The first detection circuit detects the output power to obtain a first detection result. The first detection result is a variation of an output current value of the output power. The second detection circuit detects electrical characteristics other than the output current value to obtain a second detection result. The controller determines whether to limit output of the output power according to a relationship between the first detection result and the second detection result.
    Type: Application
    Filed: October 5, 2022
    Publication date: June 29, 2023
    Applicant: Power Forest Technology Corporation
    Inventors: Rong-Jie Tu, Hung-Chih Chiu, Chien-Lung Lee
  • Publication number: 20230065722
    Abstract: A switching regulator clamping the power or ground of the power switch driver is introduced. In a buck regulator, the first power switch is coupled between the input terminal of the buck regulator and the first terminal of an inductor. The second terminal of the inductor is coupled to the output terminal of the buck regulator. The second power switch is coupled between the first terminal of the inductor and an internal ground of the buck regulator. There is a driver power clamp configured to clamp the power terminal of the driver of the second power switch when the first power switch is turned off. In a boost regulator, a driver power clamp is configured to clamp the ground terminal of the driver of the power switch that couples the input inductor to an output terminal of the boost regulator when another power switch is turned off.
    Type: Application
    Filed: November 8, 2022
    Publication date: March 2, 2023
    Inventors: Chien-Lung LEE, Jin-Yan SYU
  • Patent number: 11522439
    Abstract: A switching regulator clamping the power or ground of the power switch driver is introduced. In a buck regulator, the power switch is coupled between the input terminal of the buck regulator and the first terminal of an inductor. The second terminal of the inductor is coupled to the output terminal of the buck regulator. There is a driver power clamp configured to clamp the ground terminal of the driver of the power switch. In a boost regulator, an inductor is provided which has a first terminal coupled to an input terminal of the boost regulator and has a second terminal coupled to the negative supply terminal of the power supply through a power switch. The boost regulator has a driver power clamp that is configured to clamp the power terminal of the driver of the power switch.
    Type: Grant
    Filed: November 9, 2020
    Date of Patent: December 6, 2022
    Assignee: MEDIATEK INC.
    Inventors: Chien-Lung Lee, Jin-Yan Syu
  • Publication number: 20220045606
    Abstract: The present invention provides a voltage regulator including a voltage control circuit and a current control circuit. The voltage control circuit is configured to receive an output voltage of the voltage regulator to generate a first current to an output terminal of the voltage regulator; and the current control circuit is configured to generate a second current to the output terminal of the voltage regulator according to an output current of the voltage regulator, wherein the output current is generated according to the first current and the second current.
    Type: Application
    Filed: July 7, 2021
    Publication date: February 10, 2022
    Applicant: MEDIATEK INC.
    Inventors: Chien-Lung Lee, Jin-Yan Syu
  • Publication number: 20210226524
    Abstract: A switching regulator clamping the power or ground of the power switch driver is introduced. In a buck regulator, the power switch is coupled between the input terminal of the buck regulator and the first terminal of an inductor. The second terminal of the inductor is coupled to the output terminal of the buck regulator. There is a driver power clamp configured to clamp the ground terminal of the driver of the power switch. In a boost regulator, an inductor is provided which has a first terminal coupled to an input terminal of the boost regulator and has a second terminal coupled to the negative supply terminal of the power supply through a power switch. The boost regulator has a driver power clamp that is configured to clamp the power terminal of the driver of the power switch.
    Type: Application
    Filed: November 9, 2020
    Publication date: July 22, 2021
    Inventors: Chien-Lung LEE, Jin-Yan SYU
  • Publication number: 20190190518
    Abstract: Systems and methods are described herein for controlling a switch. In some embodiments, circuitry may detect a voltage across the switch. A current reference signal may be generated based on the voltage across the switch. The switch may be controlled based, at least in part, on the current reference signal.
    Type: Application
    Filed: December 11, 2018
    Publication date: June 20, 2019
    Applicant: MediaTek Inc.
    Inventors: Yun-Yao Hung, Chien-Lung Lee, Shao-Siang Ng, Chun-Yen Tseng
  • Patent number: 10122258
    Abstract: A DC-DC converter includes an inductor, a switch module, and a pull-up circuit or a pull-down circuit. The inductor has a first node and a second node, and the second node is coupled to an output node of the DC-DC converter. The switch module is arranged for selectively connecting an input voltage or a ground voltage to the first node of the inductor according to a driving signal. The pull-up circuit is arranged for selectively providing a first current to the output node of the DC-DC converter. The pull-down circuit is arranged for selectively sinking a second current from the output node of the DC-DC converter. In addition, the first current or the second current is determined based on an inductor current flowing through the inductor.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: November 6, 2018
    Assignee: MEDIATEK INC.
    Inventors: Shih-Mei Lin, Chien-Wei Kuan, Chien-Lung Lee, Che-Hao Meng
  • Patent number: 9929576
    Abstract: A method, device and adaptor for dynamically adjusting charging current of the adaptor to achieve thermal protection and fast charging. The method includes the steps of: checking whether the adaptor is capable of providing a target current for a battery connected to a charger device, and generating a check result; and according to the check result, making the adaptor to adjust a charging voltage provided by the adaptor from a first voltage to a second voltage so as to adjust the charging current supplied by the adaptor.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: March 27, 2018
    Assignee: MEDIATEK INC.
    Inventors: Chien-Lung Lee, Chih-Chien Huang
  • Publication number: 20180083526
    Abstract: A DC-DC converter includes an inductor, a switch module, and a pull-up circuit or a pull-down circuit. The inductor has a first node and a second node, and the second node is coupled to an output node of the DC-DC converter. The switch module is arranged for selectively connecting an input voltage or a ground voltage to the first node of the inductor according to a driving signal. The pull-up circuit is arranged for selectively providing a first current to the output node of the DC-DC converter. The pull-down circuit is arranged for selectively sinking a second current from the output node of the DC-DC converter. In addition, the first current or the second current is determined based on an inductor current flowing through the inductor.
    Type: Application
    Filed: November 30, 2017
    Publication date: March 22, 2018
    Inventors: Shih-Mei Lin, Chien-Wei Kuan, Chien-Lung Lee, Che-Hao Meng
  • Patent number: 9866119
    Abstract: A DC-DC converter includes an inductor, a switch module, a pull-up circuit and a pull-down circuit. The inductor has a first node and a second node, and the second node is coupled to an output node of the DC-DC converter. The switch module is arranged for selectively connecting an input voltage or a ground voltage to the first node of the inductor according to a driving signal. The pull-up circuit is arranged for selectively providing a first current to the output node of the DC-DC converter. The pull-down circuit is arranged for selectively sinking a second current from the output node of the DC-DC converter. In addition, at least one of the first current provided by the pull-up circuit and the second current sunk by the pull-down circuit is determined based on an inductor current flowing through the inductor.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: January 9, 2018
    Assignee: MEDIATEK INC.
    Inventors: Shih-Mei Lin, Chien-Wei Kuan, Chien-Lung Lee, Che-Hao Meng
  • Publication number: 20170222556
    Abstract: A DC-DC converter includes an inductor, a switch module, a pull-up circuit and a pull-down circuit. The inductor has a first node and a second node, and the second node is coupled to an output node of the DC-DC converter. The switch module is arranged for selectively connecting an input voltage or a ground voltage to the first node of the inductor according to a driving signal. The pull-up circuit is arranged for selectively providing a first current to the output node of the DC-DC converter. The pull-down circuit is arranged for selectively sinking a second current from the output node of the DC-DC converter. In addition, at least one of the first current provided by the pull-up circuit and the second current sunk by the pull-down circuit is determined based on an inductor current flowing through the inductor.
    Type: Application
    Filed: July 5, 2016
    Publication date: August 3, 2017
    Inventors: Shih-Mei Lin, Chien-Wei Kuan, Chien-Lung Lee, Che-Hao Meng
  • Publication number: 20160344219
    Abstract: A method for adjusting a voltage threshold for a battery being connected to a portable device includes: dynamically measuring an internal resistance of the battery; and dynamically adjusting the voltage threshold according to the internal resistance of the battery and a current flowing through the battery.
    Type: Application
    Filed: December 16, 2014
    Publication date: November 24, 2016
    Applicant: MEDIATEK INC,
    Inventors: Chien-Lung Lee, Chih-Chien Huang
  • Publication number: 20160049804
    Abstract: A method, device and adaptor for dynamically adjusting charging current of the adaptor to achieve thermal protection and fast charging. The method includes the steps of: checking whether the adaptor is capable of providing a target current for a battery connected to a charger device, and generating a check result; and according to the check result, making the adaptor to adjust a charging voltage provided by the adaptor from a first voltage to a second voltage so as to adjust the charging current supplied by the adaptor.
    Type: Application
    Filed: June 3, 2014
    Publication date: February 18, 2016
    Inventors: Chien-Lung Lee, Chih-Chien Huang
  • Publication number: 20150355408
    Abstract: An illumination lamp having light guide bar is to dispose with at least a luminous component at an end of the light guide bar, and a plurality of mesh points is formed on a surface of the light guide bar. The luminous component comprises a heat dissipation base, a fastening base, a circuit board and two pins. The fastening base is assembled to the heat dissipation base and disposed with a through hole. An insertion slot is extended from an end of the fastening base. The circuit board is disposed with at least a LED component and placed between the heat dissipation base and the fastening base. The pins are disposed in the insertion slot of the fastening base and engaged to the circuit board. Accordingly, after conducting the luminous component, light source of the LED component enters in the light guide bar. [Light beam can be diffused by utilizing the refraction of the mesh points disposed on the surface of the light guide bar.
    Type: Application
    Filed: June 10, 2014
    Publication date: December 10, 2015
    Inventors: JYH-HUEI LAY, CHIEN-LUNG LEE, HUNG-WEI YANG, HSIN-LIANG LAI
  • Patent number: 8761025
    Abstract: A method used for testing the communication performance of a plurality of wireless signal access devices, and the steps of the testing method of each wireless signal access device include: (a). booting up the wireless signal access device; (b). activating said the wireless signal access device to transmit or receive testing packets to test the communication performance of the wireless signal access device. The feature of the present invention lies in completing a step a of the next wireless signal access device before completing a step b of a first wireless signal access device, and starting the step b of the next wireless signal access device in an appropriate timing after completing the step b of the first wireless signal access device, thereby reaching the goal of reducing the test time.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: June 24, 2014
    Assignee: Accton Technology Corporation
    Inventors: Chien-Lung Lee, Yi-Ming Wang, Chih-Hsien Shen
  • Publication number: 20120243419
    Abstract: A method used for testing the communication performance of a plurality of wireless signal access devices, and the steps of the testing method of each wireless signal access device include: (a). booting up the wireless signal access device; (b). activating said the wireless signal access device to transmit or receive testing packets to test the communication performance of the wireless signal access device. The feature of the present invention lies in completing a step a of the next wireless signal access device before completing a step b of a first wireless signal access device, and starting the step b of the next wireless signal access device in an appropriate timing after completing the step b of the first wireless signal access device, thereby reaching the goal of reducing the test time.
    Type: Application
    Filed: March 23, 2012
    Publication date: September 27, 2012
    Inventors: CHIEN-LUNG LEE, YI-MING WANG, CHIH-HSIEN SHEN