Patents by Inventor Yen-Ming Liu

Yen-Ming Liu 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).

  • Publication number: 20250125161
    Abstract: Some implementations described herein provide an etch tool having a nozzle component. The nozzle component (e.g., a gas injector component) includes a spinel-based composite material that has an increased resistivity to damage and/or debris generation within the etch tool during a plasma-based etch operation that etches material from a semiconductor substrate. The increased resistivity may decrease contamination within the etch tool to increase a yield of integrated circuit devices on the semiconductor substrate relative to another semiconductor substrate that is etched using another etch tool having another nozzle component of another material.
    Type: Application
    Filed: October 13, 2023
    Publication date: April 17, 2025
    Inventors: Yen-Ming LIU, Li-Chun WANG, Chin-Hau MENG, Ren-Guan DUAN
  • Publication number: 20250088032
    Abstract: A wireless charging module includes a module case, a fan, a coil assembly and a circuit board. The module case defines a first cavity and a second cavity and has a first side and a second side opposite to the first side. The second side defines an air outlet. The fan is disposed at the first side of the module case and configured to form an airflow S. The coil assembly is disposed in the first cavity, so that a first air channel is formed for the airflow S to pass through a first surface of the coil assembly. The circuit board is disposed in the second cavity and configured to form a second air channel allowing the airflow S to pass through a first surface of the circuit board and a third air channel allowing the airflow S to pass through a second surface of the circuit board. The airflow S passes through the first air channel, the second air channel and the third air channel and flows out of the wireless charging module from the air outlet.
    Type: Application
    Filed: September 8, 2023
    Publication date: March 13, 2025
    Inventors: KUAN-YU CHIU, YEN-MING LIU, CHIEN-HUI CHEN, YUNG-YU CHANG
  • Patent number: 11601015
    Abstract: A wireless charger, comprising: a thermal-conductive plastic cover; a first circuit board; and a metallic case, wherein the first circuit board are disposed in the metallic case, wherein a wind tunnel is formed between the thermal-conductive plastic cover and the circuit board for lowering the temperature of an electronic device that is wirelessly charged on the thermal-conductive plastic cover.
    Type: Grant
    Filed: January 24, 2022
    Date of Patent: March 7, 2023
    Assignee: CYNTEC CO., LTD.
    Inventors: Tsung-Chan Wu, Kuan Yu Chiu, Chien-Hui Chen, Yen-Ming Liu
  • Publication number: 20220399763
    Abstract: a wireless charger, comprising: a top cover for placing an electronic device thereon; at least one coil, disposed under the top cover; and a first magnet embedded inside the top cover for aligning with a second magnet of the electronic device for wireless charging the electronic device.
    Type: Application
    Filed: June 10, 2022
    Publication date: December 15, 2022
    Inventors: TSUNG-CHAN WU, Yen-Ming Liu, Xuan-Long Huang
  • Publication number: 20220239152
    Abstract: A wireless charger, comprising: a thermal-conductive plastic cover; a first circuit board; and a metallic case, wherein the first circuit board are disposed in the metallic case, wherein a wind tunnel is formed between the thermal-conductive plastic cover and the circuit board for lowering the temperature of an electronic device that is wirelessly charged on the thermal-conductive plastic cover.
    Type: Application
    Filed: January 24, 2022
    Publication date: July 28, 2022
    Inventors: TSUNG-CHAN WU, Kuan Yu Chiu, Chien-Hui Chen, Yen-Ming Liu
  • Publication number: 20220158491
    Abstract: A wireless charger comprises a top cover; a metallic case; and a first thermoelectric cooler chip, disposed between a bottom surface of the top cover and a top surface of the metallic case to form a heat conductive path from the top cover to the metallic case via the first thermoelectric cooler chip for dissipating heat generated by an electronic device disposed on the top cover for wireless charging the electronic device.
    Type: Application
    Filed: November 10, 2021
    Publication date: May 19, 2022
    Inventors: TSUNG-CHAN WU, Yen-Ming Liu, Chien-Hui Chen
  • Patent number: 9614447
    Abstract: A method for controlling an active-clamp flyback power converter is provided. The control method comprises: generating a first switch signal according to an output voltage and a current sensing signal, and selectively generating a second switch signal in a complementary or non-complementary control mode according to the current sensing signal and the first switch signal. The first switch signal is coupled to drive a low-side power switch for switching a transformer and the output voltage regulation of the active-clamp flyback power converter. The second switch signal is coupled to drive a high-side power switch for recycling leakage energy of the transformer and achieving a soft-switching of the low-side power switch. With the control method, the high-side power switch can adaptively switch in a complementary or non-complementary control mode depending on the output load and input voltage conditions.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: April 4, 2017
    Assignee: FAIRCHILD (TAIWAN) CORPORATION
    Inventor: Yen-Ming Liu
  • Publication number: 20170070152
    Abstract: A method for controlling an active-clamp flyback power converter is provided. The control method comprises: generating a first switch signal according to an output voltage and a current sensing signal, and selectively generating a second switch signal in a complementary or non-complementary control mode according to the current sensing signal and the first switch signal. The first switch signal is coupled to drive a low-side power switch for switching a transformer and the output voltage regulation of the active-clamp flyback power converter. The second switch signal is coupled to drive a high-side power switch for recycling leakage energy of the transformer and achieving a soft-switching of the low-side power switch. With the control method, the high-side power switch can adaptively switch in a complementary or non-complementary control mode depending on the output load and input voltage conditions.
    Type: Application
    Filed: September 3, 2015
    Publication date: March 9, 2017
    Inventor: Yen-Ming Liu
  • Patent number: 9276483
    Abstract: A method for controlling an active-clamp flyback power converter is provided. The method includes comprises: generating a switching signal in response to a feedback signal for switching a low-side transistor and regulating an output of the active-clamp flyback power converter; generating an active-clamp signal after the switching signal is disabled; generating a hysteresis bias to adjust the feedback signal; and generating a pulse signal periodically to enable the switching signal. The low-side transistor is coupled to switch a transformer. The switching signal is coupled to drive the low-side transistor. The active-clamp signal is coupled to drive a high-side transistor. A pulse width of the active-clamp signal is determined by a first resistor. The high-side transistor is connected in series with a capacitor to develop an active-clamp circuit. A minimum frequency of the switching signal is determined by a second resistor during a heavy load condition.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: March 1, 2016
    Assignee: SYSTEM GENERAL CORPORATION
    Inventors: Ta-Yung Yang, Yen-Ming Liu
  • Patent number: 9158323
    Abstract: A power control circuit for a power supply system including a control unit, a driving circuit and a power supply unit is disclosed. The power control circuit includes a current detection unit, a voltage detection unit and a power detection unit. The current detection unit is used for detecting a current signal. The voltage detection unit is used for detecting a voltage signal. The power detection unit is connected with the current detection unit, the voltage detection unit and the control unit for acquiring a power signal according to the current signal and voltage signal. By comparing an adjustable power reference signal with the power signal, the control unit issues a control signal to the driving circuit. In response to the control signal, the power supply unit is driven by the driving circuit to output an adjusted power to the load according to the adjustable power reference signal.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: October 13, 2015
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Yen-Ming Liu, Cheng-Chang Huang, Hui-Hsin Lin
  • Publication number: 20150003121
    Abstract: A method for controlling an active-clamp flyback power converter is provided. The method includes comprises: generating a switching signal in response to a feedback signal for switching a low-side transistor and regulating an output of the active-clamp flyback power converter; generating an active-clamp signal after the switching signal is disabled; generating a hysteresis bias to adjust the feedback signal; and generating a pulse signal periodically to enable the switching signal. The low-side transistor is coupled to switch a transformer. The switching signal is coupled to drive the low-side transistor. The active-clamp signal is coupled to drive a high-side transistor. A pulse width of the active-clamp signal is determined by a first resistor. The high-side transistor is connected in series with a capacitor to develop an active-clamp circuit. A minimum frequency of the switching signal is determined by a second resistor during a heavy load condition.
    Type: Application
    Filed: June 26, 2014
    Publication date: January 1, 2015
    Inventors: Ta-Yung YANG, Yen-Ming LIU
  • Publication number: 20140098580
    Abstract: A power control circuit for a power supply system including a control unit, a driving circuit and a power supply unit is disclosed. The power control circuit includes a current detection unit, a voltage detection unit and a power detection unit. The current detection unit is used for detecting a current signal. The voltage detection unit is used for detecting a voltage signal. The power detection unit is connected with the current detection unit, the voltage detection unit and the control unit for acquiring a power signal according to the current signal and voltage signal. By comparing an adjustable power reference signal with the power signal, the control unit issues a control signal to the driving circuit. In response to the control signal, the power supply unit is driven by the driving circuit to output an adjusted power to the load according to the adjustable power reference signal.
    Type: Application
    Filed: January 8, 2013
    Publication date: April 10, 2014
    Applicant: DELTA ELECTRONICS, INC.
    Inventors: Yen-Ming Liu, Cheng-Chang Huang, Hui-Hsin Lin
  • Publication number: 20120187107
    Abstract: A quasi-resonant inverter control system includes a mains zero-crossing detection circuit and a controller. The mains zero-crossing detection circuit is operable to detect a plurality of zero-crossing points of an input alternating-current voltage and output a zero-crossing detection signal based on the zero-crossing points. The controller is operable to control a plurality of burst mode period and receives the zero-crossing detection signal. Each of the burst mode periods includes a working duration and a non-working duration. Each of the working durations includes a start point and an end point. The controller is operable to determine the start points and the end points of the working durations based on the zero-crossing detection signal and outputs a control signal based on the start points and the end points of the working durations. An electric heating device and a method for controlling the quasi-resonant inverter are also disclosed herein.
    Type: Application
    Filed: September 23, 2011
    Publication date: July 26, 2012
    Applicant: DELTA ELECTRONICS, INC.
    Inventors: Yen-Ming LIU, Yen-Chang CHEN, Chun-Wei LIN
  • Patent number: 8009448
    Abstract: The present invention discloses a forward-flyback converter with active-clamp circuit. The secondary side of the proposed converter is of center-tapped configuration to integrate a forward circuit and a flyback circuit. The flyback sub-circuit operating continuous conduction mode is employed to directly transfer the reset energy of the transformer to the output load. The forward sub-circuit operating discontinuous conduction mode can correspondingly adjust the duty ratio with the output load change. Under the heavy load condition, the mechanism of active-clamp flyback sub-circuit can provide sufficient resonant current to facilitate the parasitic capacitance of the switches to be discharged to zero. Under the light load condition, the time interval in which the resonant current turns from negative into positive is prolonged to ensure zero voltage switching function. Meanwhile, the flyback sub-circuit wherein the rectifier diode is reverse biased is inactive in order to further reduce the power losses.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: August 30, 2011
    Assignee: Delta Electronics, Inc.
    Inventor: Yen-Ming Liu
  • Publication number: 20100067259
    Abstract: The present invention discloses a forward-flyback converter with active-clamp circuit. The secondary side of the proposed converter is of center-tapped configuration to integrate a forward circuit and a flyback circuit. The flyback sub-circuit operating continuous conduction mode is employed to directly transfer the reset energy of the transformer to the output load. The forward sub-circuit operating discontinuous conduction mode can correspondingly adjust the duty ratio with the output load change. Under the heavy load condition, the mechanism of active-clamp flyback sub-circuit can provide sufficient resonant current to facilitate the parasitic capacitance of the switches to be discharged to zero. Under the light load condition, the time interval in which the resonant current turns from negative into positive is prolonged to ensure zero voltage switching function. Meanwhile, the flyback sub-circuit wherein the rectifier diode is reverse biased is inactive in order to further reduce the power losses.
    Type: Application
    Filed: April 3, 2009
    Publication date: March 18, 2010
    Applicant: DELTA ELECTRONICS, INC.
    Inventor: Yen-Ming Liu