Patents by Inventor An-Chi Liu

An-Chi 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: 20220223716
    Abstract: A high electron mobility transistor (HEMT) includes a buffer layer on a substrate, a barrier layer on the buffer layer, a gate electrode on the barrier layer, a field plate adjacent to two sides of the gate electrode, and a first passivation layer adjacent to two sides of the gate electrode. Preferably, a sidewall of the field plate includes a first curve.
    Type: Application
    Filed: March 28, 2022
    Publication date: July 14, 2022
    Applicant: UNITED MICROELECTRONICS CORP.
    Inventors: An-Chi Liu, Chun-Hsien Lin
  • Patent number: 11380999
    Abstract: A slot antenna comprises a printed circuit board, wherein the printed circuit board has a slot, a first capacitor, a radio frequency signal source, a transmission line, and a ground cable, wherein one end of the slot is open, and the other end is closed; the first capacitor and the ground cable are disposed on the printed circuit board, wherein the first capacitor is located on the open end of the slot; the transmission line connects the first capacitor to the radio frequency signal source; and the radio frequency signal source is configured to stimulate a feeding signal, and feed the feeding signal to the open end of the slot, wherein the radio frequency signal source connects the transmission line to the ground cable, and wherein a feed point from the radio frequency signal source to the transmission line is located outside the slot.
    Type: Grant
    Filed: September 21, 2020
    Date of Patent: July 5, 2022
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Hanyang Wang, Jianming Li, Xuefei Zhang, Chi Liu
  • Patent number: 11381165
    Abstract: The power supply controller is for use in a power supply circuit, for reducing acoustic noise. The power supply control circuit generates a control signal according to a voltage identification (VID) signal and a voltage sense signal, to operate a power switch in a power stage circuit, thus converting an input voltage to an output voltage. The power supply control circuit includes a conversion circuit and a PWM control circuit. The conversion circuit includes a DAC and a slope control circuit. When the power supply controller operates in an acoustic noise reduction mode and when a present level is higher than a requested level, the slope control circuit adjusts a descending slope of an analog voltage identification signal which is generated according to the VID signal, so as to restrain a decrease velocity of the output voltage to be higher than zero but not higher than a predetermined velocity.
    Type: Grant
    Filed: January 11, 2021
    Date of Patent: July 5, 2022
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Chia-Chi Liu, Yu-Chieh Lin, Yen-Hsun Wang, Ruei-Pei Jiang
  • Patent number: 11381173
    Abstract: A switching regulator which has load transient quick response ability includes at least one power stage circuit and a control circuit. The control circuit includes a pulse width modulation (PWM) signal generation circuit and a quick response (QR) signal generation circuit. The PWM signal generation circuit generates a PWM signal according to an output voltage and a QR signal, to control a power switch of the corresponding power stage circuit, thus converting an input voltage to the output voltage. The QR signal generation circuit includes a differentiator circuit and a comparison circuit. The differentiator circuit performs a differential operation on a voltage sensing signal related to the output voltage, to generate a differential signal. The comparison circuit compares the differential signal with a QR threshold signal, such that when the differential signal exceeds the QR signal, the PWM signal generation circuit performs a QR procedure.
    Type: Grant
    Filed: January 11, 2021
    Date of Patent: July 5, 2022
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Yung-Jen Chen, Yu-Chieh Lin, Chia-Chi Liu, Fu-To Lin
  • Patent number: 11382177
    Abstract: A heating apparatus includes: first and second heaters, first and second switches, first and second ramp signal generation circuits, a signal processor circuit, first and second comparison circuits, and a switch control circuit. The first and second ramp signal generation circuits generate first and second ramp signals according to first and second output currents, respectively. The signal processor circuit senses a temperature to generate a temperature-related signal. The first and second comparison circuits compare the first and second ramp signals with the temperature-related signal, to generate a first PWM signal and a second PWM signal for controlling the first and second switches respectively, to determine the first and second output currents so that there is a predetermined ratio between average powers of the first heater and the second heater.
    Type: Grant
    Filed: April 3, 2019
    Date of Patent: July 5, 2022
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Kuo-Chi Liu, Chang-Yu Ho
  • Publication number: 20220207791
    Abstract: A system for estimating attenuation coefficients from only single photon emission computed tomography (SPECT) emission data using deep neural networks includes an artificial neural network based upon machine learning system estimating attenuation maps for SPECT emission data, and associated attenuation correction method.
    Type: Application
    Filed: April 17, 2020
    Publication date: June 30, 2022
    Inventors: Luyao Shi, Chi Liu, John Onofrey, Hui Liu
  • Publication number: 20220174236
    Abstract: There is provided a pixel circuit for performing analog operation including a photodiode, a first temporal circuit, a second temporal circuit and an operation circuit. Within a first interval, the photodiode detects first light energy to be stored in the first temporal circuit. Within a second interval, the photodiode detects second light energy to be stored in the second temporal circuit. Within an operation interval, the first temporal circuit outputs a first detection signal having a first pulse width according to the first light energy and outputs a second detection signal having a second pulse width according to the second light energy for being calculated by the operation circuit.
    Type: Application
    Filed: February 15, 2022
    Publication date: June 2, 2022
    Inventors: REN-CHIEH LIU, CHIH-HUAN WU, YI-HSIEN KO, HAN-CHI LIU
  • Publication number: 20220166324
    Abstract: A resonant switching power converter includes: a power stage circuit and a driving circuit. The power stage circuit includes: a resonant capacitor, a resonant inductor and switches. The driving circuit includes: drivers for driving the switches; and a power supply circuit for providing driving powers to the drivers. The power supply circuit includes: a voltage booster circuit generating a booster power supply according to a clock signal, a DC voltage and an output related signal; driving capacitors, wherein a voltage across each driving capacitor corresponds to one driving power; and supply diodes, which are coupled in series from the booster power supply along a forward direction of the supply diodes. A backward end of each supply diode is coupled to a positive end of one corresponding driving power, to charge one corresponding driving capacitor, thus generating the corresponding driving power.
    Type: Application
    Filed: November 6, 2021
    Publication date: May 26, 2022
    Inventors: Kuo-Chi Liu, Ta-Yung Yang, Chung-Lung Pai
  • Patent number: 11342282
    Abstract: A semiconductor device package includes an electronic component, an electrical contact and a reinforcement layer. The electronic component has a first conductive layer on a first surface of the electronic component. The electronic component has a through-silicon-via (TSV) penetrating the electronic component and electrically connected to the first conductive layer. The electrical contact is disposed on the first surface of the electronic component and electrically connected to the first conductive layer. The reinforcement layer is disposed on the first surface of the electronic component.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: May 24, 2022
    Assignee: ADVANCED SEMICONDUCTOR ENGINEERING, INC.
    Inventors: Hsu-Chiang Shih, Hung-Yi Lin, Meng-Wei Hsieh, Yu Sheng Chang, Hsiu-Chi Liu, Mark Gerber
  • Patent number: 11340645
    Abstract: A power conversion apparatus for tracking maximum power point (MPP) includes: a signal processing circuit generating a first sensing signal at a sensing node; a first comparison circuit generating a first control signal according to a difference between the first sensing signal and a first reference voltage; and a second comparison circuit sensing a second sensing signal generated from the conversion circuit. The second comparison circuit generates a second control signal according to a difference between the second sensing signal and a reference signal. The signal processing circuit includes a bias sensing circuit and a clamp circuit. The bias sensing circuit adjusts the first sensing signal according to the second control signal, to adjust the first control signal. The conversion circuit adjusts a voltage and/or current of the output power according to the adjusted first control signal, so that a power retrieval source operates near its MPP.
    Type: Grant
    Filed: December 30, 2019
    Date of Patent: May 24, 2022
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Kuo-Chi Liu, Chang-Yu Ho
  • Publication number: 20220156033
    Abstract: A method of changing operation based on music transition is disclosed. In the method, an electronic device performs Fourier series transform on a sound signal of music to obtain a rhythm diagram of the sound signal, and then performs an operation to extract a rhythm segment point of a rhythm diagram, a waveform and a spectrogram of the sound signal, when each of intensity of the rhythm diagram, intensity of the waveform and magnitude of the spectrogram has a drop of a preset percentage at the same time for a preset time, a time point of the drop is used as the rhythm segment point, the sound signal of the music is faded out, and the electronic device transmits an operation signal to an operation device at the rhythm segment point. After receiving the operation signal, the operation device performs the corresponding action based on the operation signal.
    Type: Application
    Filed: December 9, 2020
    Publication date: May 19, 2022
    Inventor: You-Chi LIU
  • Publication number: 20220156034
    Abstract: Method of generating actions following the rhythm of music includes the steps of (a) using an electronic device to classify the sound signals from plural musical instruments into a complex pitch range, (b) the electronic device selecting at least one pitch range according to the significance of the sound, and then performing Fourier series conversion on the sound signals of the selected said at least one pitch range to obtain at least one rhythm diagram. (c) the electronic device performing a rhythm change point capture action on the rhythm diagram, and then executing no action if the intensity in the rhythm diagram continues to increase with time, or regarding the point as a rhythm change point if the intensity changes from an increase to a decrease, and then transmitting an action signal to an action device, and (c) the action device executing the corresponding action according to the action signal.
    Type: Application
    Filed: December 9, 2020
    Publication date: May 19, 2022
    Inventor: You-Chi LIU
  • Publication number: 20220159810
    Abstract: A method of producing a light animation with a rhythm of music is disclosed. An electronic device performs Fourier series transform on a sound signal of music produced from at least one musical instrument, so as to obtain a rhythm diagram of the sound signal. The operation to extract a rhythm change point of the rhythm diagram is performed, and when the intensity of the rhythm diagram has a change from increase to decrease, the time point of the change is used as the rhythm change point and the electronic device transmits a lighting control signal to a light emitting device. After receiving the lighting control signal, the light emitting device emits light based on the lighting control signal, and the light emitted from the light emitting device continues to form the light animation, thereby improving overall performance appreciation of the music for audiences.
    Type: Application
    Filed: November 16, 2020
    Publication date: May 19, 2022
    Inventor: You-Chi LIU
  • Publication number: 20220156031
    Abstract: A method of generating actions following the rhythm of music includes the steps of (a) using an electronic device to perform Fourier series conversion on a sound signal from a single musical instrument to obtain a rhythm diagram, (b) the electronic device performing a rhythm change point capture action on the rhythm diagram, and then executing no action if the intensity in said rhythm diagram continues to increase with time, or regarding the point as a rhythm change point if the intensity changes from an increase to a decrease, and then transmitting an action signal to an action device, and (c) the action device executing the corresponding action according to the action signal.
    Type: Application
    Filed: November 16, 2020
    Publication date: May 19, 2022
    Inventor: You-Chi LIU
  • Publication number: 20220156035
    Abstract: A method of generating actions following the rhythm of music includes the steps of (a) using an electronic device to classify the sound signals from plural musical instruments into a complex pitch range, (b) the electronic device performing Fourier series conversion on the sound signals of the complex pitch range to obtain plural rhythm diagrams, (c) the electronic device performing a rhythm change point capture action on each rhythm diagram, and then executing no action if the intensity in the rhythm diagram continues to increase with time, or regarding the point as a rhythm change point if the intensity changes from an increase to a decrease, and then transmitting an action signal to an action device, and (c) the action device executing the corresponding action according to the action signal.
    Type: Application
    Filed: December 9, 2020
    Publication date: May 19, 2022
    Inventor: You-Chi LIU
  • Patent number: 11335601
    Abstract: Non-planar I/O and logic semiconductor devices having different workfunctions on common substrates and methods of fabricating non-planar I/O and logic semiconductor devices having different workfunctions on common substrates are described. For example, a semiconductor structure includes a first semiconductor device disposed above a substrate. The first semiconductor device has a conductivity type and includes a gate electrode having a first workfunction. The semiconductor structure also includes a second semiconductor device disposed above the substrate. The second semiconductor device has the conductivity type and includes a gate electrode having a second, different, workfunction.
    Type: Grant
    Filed: December 4, 2020
    Date of Patent: May 17, 2022
    Assignee: Intel Corporation
    Inventors: Roman W. Olac-Vaw, Walid M. Hafez, Chia-Hong Jan, Pei-Chi Liu
  • Publication number: 20220139922
    Abstract: A memory device includes a first electrode, a first support layer, a dielectric layer and a second electrode. The first electrode is disposed on a substrate and extending upwards. The first support layer laterally supports an upper portion of a sidewall of the first electrode, where the first support layer has a slim portion. The dielectric layer is disposed on the first electrode and the first support layer. The second electrode is disposed on the dielectric layer. In addition, a method of fabricating the memory device is provided.
    Type: Application
    Filed: August 17, 2021
    Publication date: May 5, 2022
    Applicant: Fujian Jinhua Integrated Circuit Co., Ltd.
    Inventors: Yi-Wang Jhan, Yu-Cheng Tung, Fu-Che Lee, Chien-Cheng Tsai, An-Chi Liu, Ming-Feng Kuo, Gang-Yi Lin, JUNYI ZHENG
  • Publication number: 20220140726
    Abstract: A resonant switching power converter includes: a first power stage circuit; a second power stage circuit; a controller; and a current sensing circuit configured to sense a first charging/discharging resonant current flowing through a first charging/discharging inductor of the first power stage circuit and sense a second charging/discharging resonant current flowing through a second charging/discharging inductor of the second power stage circuit, to generate a corresponding first current sensing signal and a corresponding second current sensing signal, respectively. The controller adjusts at least one of a first delay interval, a second delay interval, a third delay interval, a fourth delay interval, and/or input voltages, according to a first current sensing signal and a second current sensing signal, so that a constant ratio between an output current of the first power stage circuit and an output current of the second power stage circuit is achieved.
    Type: Application
    Filed: October 12, 2021
    Publication date: May 5, 2022
    Inventors: Kuo-Chi Liu, Ta-Yung Yang, Chung-Lung Pai
  • Patent number: 11322600
    Abstract: A high electron mobility transistor (HEMT) includes a buffer layer on a substrate, a barrier layer on the buffer layer, a gate electrode on the barrier layer, a first passivation layer adjacent to two sides of the gate electrode, and a p-type semiconductor layer between the gate electrode and the barrier layer. Preferably, a corner of the p-type semiconductor layer contacting a sidewall of the first passivation layer includes a first curve, and a bottom surface of the p-type semiconductor layer directly on the first passivation layer includes a second curve.
    Type: Grant
    Filed: October 14, 2019
    Date of Patent: May 3, 2022
    Assignee: UNITED MICROELECTRONICS CORP.
    Inventors: An-Chi Liu, Chun-Hsien Lin
  • Publication number: 20220117549
    Abstract: Arousal events can be determined for a user associated with a wearable device, such as a user wearing a wearable computing device including one or more sensors. The one or more sensors may obtain EDA information that may determine a sympathetic nervous system response of the user, which may be responsive to an arousal event or an activation. Detection of events that increase the EDA response may provide information to the user regarding arousal events and provide recommendations to the user to address the arousal events to decrease their response.
    Type: Application
    Filed: December 29, 2021
    Publication date: April 21, 2022
    Inventors: Man-Chi Liu, Alexander Statan, Derrick Steven Vickers, Paul Francis Stetson, Elena Perez, James Horng-Kuang Lin, Belen Lafon, Lindsey Michelle Sunden