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).

  • Patent number: 11736007
    Abstract: A resonant switching power converter includes: capacitors; switches; one charging inductor; and one discharging inductor. In a charging process, by switching the switches, the capacitors and the charging inductor form a charging path between an input voltage and an output voltage, wherein a turned-ON time point and a turned-OFF time point of the switches are synchronous with a start time point and an end time point of a positive half wave of a charging resonant current. In a discharging process, by switching the switches, each capacitor and the discharging inductor are connected in series between the output voltage and a ground voltage level, whereby plural discharging paths are formed, wherein a turned-ON time point and a turned-OFF time point of the switches are synchronous with a start time point and an end time point of a positive half wave of a discharging resonant current.
    Type: Grant
    Filed: April 2, 2021
    Date of Patent: August 22, 2023
    Inventors: Kuo-Chi Liu, Chung-Lung Pai
  • Publication number: 20230246548
    Abstract: A switched capacitor voltage converter circuit for converting a first voltage to a second voltage, includes: a switched capacitor converter and a control circuit. The switched capacitor converter includes at least two capacitors, plural switches and at least one inductor. In a mode switching period wherein the switched capacitor converter switches from a present conversion mode to a next conversion mode, at least two forward switches of the plural switches operate in a unidirectional conduction mode. Each of the forward switches provides a current channel that unidirectionally flows toward the second voltage in the unidirectional conduction mode. The switched capacitor voltage converter circuit is also operable to convert the second voltage to the first voltage.
    Type: Application
    Filed: January 1, 2023
    Publication date: August 3, 2023
    Inventors: Kuo-Chi Liu, Ta-Yung Yang, Wei-Hsu Chang
  • Publication number: 20230240583
    Abstract: A wellness tracking device includes a plurality of electrodes to receive biometric data from a user. The electrodes may receive an input from the user and transmit information, such as electrical data related to the heart or skin conductance, in order to measurement one or more physical properties. The electrodes may be arranged within the form factor provided by the wellness tracking device and also electrically isolated to provide independent data acquisition for the electrodes. Arrangement of the electrodes may be particularly selected to provide an ergonomic arrangement to enable the user to comfortably provide input data.
    Type: Application
    Filed: July 21, 2021
    Publication date: August 3, 2023
    Inventors: Lindsey Michelle Sunden, Jens Mitchell Nielsen, Anthony Zahi Faranesh, Man-Chi Liu, Jaclyn Leverett Wasson, Kyung Nim Noh
  • Patent number: 11716020
    Abstract: A DC-DC power conversion system includes a resonant switched-capacitor converter and a controller. The resonant switched-capacitor converter is switched between a first state and a second state to generate an output voltage, and includes an input terminal, a resonant tank, an output capacitor, a first set of switches and a second set of switches. The input terminal is used to receive an input voltage. The output capacitor is used to generate the output voltage. The first set of switches is turned on in the first state and turned off in the second state according to a first control signal. The second set of switches is turned on in the second state and turned off in the first state according to a second control signal. The controller adjusts the first control signal and the second control signal according to the output voltage.
    Type: Grant
    Filed: October 27, 2021
    Date of Patent: August 1, 2023
    Assignee: RICHTEK TECHNOLOGY CORP.
    Inventors: Kuo-Chi Liu, Ta-Yung Yang, Chung-Lung Pai
  • Patent number: 11714341
    Abstract: A projection device includes at least one heat source and a heat dissipation module. The heat dissipation module is connected to the heat source and is configured to dissipate heat energy generated by the heat source. The heat dissipation module includes a tank, at least one radiator, at least one cold plate, a cooling fluid, and a connection pipe. The connection pipe connects the tank, the radiator, and the cold plate, so that the cooling fluid flows in the heat dissipation module. The tank includes a pressure sensing device configured to measure a liquid level of the cooling fluid in the tank. Also, a tank is provided. The projection device provided in the disclosure can learn the liquid level of the tank in real-time, and the design cost is low.
    Type: Grant
    Filed: March 9, 2021
    Date of Patent: August 1, 2023
    Assignee: Coretronic Corporation
    Inventors: Wei-Chi Liu, Kai-Lun Hou
  • Publication number: 20230236343
    Abstract: The disclosure provides an electronic device including a housing, a light-emitting element and a light diffusion structure. The housing includes a first light-transmitting hole and a second light-transmitting hole. The light-emitting element is disposed in the housing, and is aligned with the first light-transmitting hole. The light diffusion structure includes a first light diffusion layer and a second light diffusion layer. The first light diffusion layer is disposed between the housing and the light-emitting element, and comprises a first semi-transparent region and a first light-shielding region. The first semi-transparent region corresponds to the first light-transmitting hole, and the first light-shielding region surrounds the first semi-transparent region. The second light diffusion layer is disposed between the housing and the light-emitting element, and comprises a second semi-transparent region and a second light-shielding region.
    Type: Application
    Filed: September 7, 2022
    Publication date: July 27, 2023
    Inventors: Chienyi HUANG, Chao-Shun WANG, Chun-Mao TSENG, Yan-Jhang CHENG, Chi LIU, Min Che KAO, Lu-Chien CHEN
  • Publication number: 20230227970
    Abstract: Process chambers are cleaned from tin oxide deposits by a method that includes a step of forming a volatile tin-containing compound by exposing the tin oxide to a mixture of hydrogen (H2) and a hydrocarbon in a plasma, followed by a step that removes a carbon-containing polymer that formed as a result of the hydrocarbon exposure. The carbon-containing polymer can be removed by exposing the carbon-containing polymer to an oxygen-containing reactant (e.g., to O2 in a plasma), or to H2 in an absence of a hydrocarbon. These steps are repeated as many times as necessary to clean the process chamber. The method can be used to clean ALD, CVD, and PVD process chambers and is particularly useful for cleaning at a relatively low temperature of less than about 120° C.
    Type: Application
    Filed: June 10, 2021
    Publication date: July 20, 2023
    Inventors: Jeongseok Ha, Pei-Chi Liu
  • Publication number: 20230223843
    Abstract: A switched capacitor voltage converter circuit includes: a switched capacitor converter, a control circuit and a zero current estimation circuit. The switched capacitor converter includes at least one resonant capacitor, switches and at least one inductor. The zero current estimation circuit is coupled to the at least one inductor and/or the at least one resonant capacitor, for estimating a time point at which a first resonant current is zero during a first process and/or a time point at which a second resonant current is zero during a second process according to a voltage difference between two ends of the inductor, and/or a voltage difference between two ends of the resonant capacitor, to a generate a zero current estimation signal accordingly for generating the operation signal.
    Type: Application
    Filed: December 13, 2022
    Publication date: July 13, 2023
    Inventors: Kuo-Chi Liu, Ta-Yung Yang
  • Publication number: 20230207365
    Abstract: A wafer pod transfer assembly includes a wafer pod port to receive a wafer pod, a transfer axle coupled to the wafer pod port, a shaft receiver, a shaft coupled to the transfer axle and to the shaft receiver, a pin through the shaft receiver and through the shaft, wherein the pin comprises a first end and a second end, opposite the first end, and a pin buckle including a first loop and a second loop. The pin buckle is coupled to the pin, the first loop encircles the first end of the pin, and the second loop encircles the second end of the pin.
    Type: Application
    Filed: March 6, 2023
    Publication date: June 29, 2023
    Inventors: Chih-Wei CHOU, Sheng-Yuan LIN, Yuan-Hsin CHI, Yin-Tun CHOU, Hung-Chih WANG, Yu-Chi LIU
  • Patent number: 11688739
    Abstract: There is provided a logic circuit capable of preventing latch-up. The conducting of a parasitic SCR is prevented by doping an additional N+ active region in the N well region of a PMOS transistor and doping an additional P+ active region in the P well region of an NMOS transistor so as to prevent the occurrence of latch-up.
    Type: Grant
    Filed: March 19, 2021
    Date of Patent: June 27, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Yung-Ju Wen, Han-Chi Liu, Hsin-You Ko
  • Patent number: 11682966
    Abstract: A switched capacitor converter circuit includes: plural capacitors and plural switches which periodically switch the coupling relationships of the plural capacitors. During a first period, the switches control at least two of the capacitors to be electrically connected in series between the first power and the second power, and control a first capacitor of the capacitors to be electrically connected in parallel to the second power. During a second period, the switches control at least two of the capacitors to be electrically connected in series between the second power and a ground voltage level, and control a second capacitor of the capacitors to be electrically connected in parallel with the second power, thereby executing power conversion between the first power and the second power.
    Type: Grant
    Filed: May 20, 2021
    Date of Patent: June 20, 2023
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Kuo-Chi Liu, Ta-Yung Yang, Chung-Lung Pai
  • Publication number: 20230179601
    Abstract: A method for generating an application white list is applicable to a server. The method is performed by a computing device communicably connected to the server and includes following steps: collecting a network log and a system log of the server, performing an analysis procedure to extract a plurality of application attributes from the network log and the system log with one of the application attributes being an application identifier, performing a training procedure according to the plurality of application attributes to generate a candidate rule, according to a plurality of behaviors in the network log and the system log, calculating the ratio of the number of behaviors among said plurality of behaviors that conforming to the candidate rule to a number of all of said plurality of behaviors, and storing the candidate rule to a whitelist when the ratio falls within a trust interval.
    Type: Application
    Filed: December 28, 2021
    Publication date: June 8, 2023
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Tzy-Shiah WANG, Shih-Ming HUANG, Chuan-Yu CHO, Nien-Chi LIU, Che-Hao LIU
  • Publication number: 20230179093
    Abstract: A switched capacitor voltage converter circuit includes: a switched capacitor converter and a control circuit. In a charging process of a resonant operation mode, the switches in the switched capacitor converter operate to form a series connection of at least one capacitor and an inductor between a first voltage and a second voltage, as a charging path. In a discharging process of the resonant operation mode, the switches operate to form a series connection of each capacitor and the inductor between the second voltage and a ground level, thus forming plural discharging paths simultaneously or sequentially. In an inductor switching mode, the switches operate to couple one end of the inductor to the first voltage or the ground level alternatingly. The control circuit decides to operate in the resonant operation mode or the inductor switching mode according to the first voltage, thereby maintaining the second voltage within a predetermined range.
    Type: Application
    Filed: October 25, 2022
    Publication date: June 8, 2023
    Inventors: Kuo-Chi Liu, Ta-Yung Yang
  • Patent number: 11671002
    Abstract: A resonant switching power converter includes: plural capacitors; plural switches; at least one charging inductor; at least one discharging inductor; a controller which generates a charging operation signal and at least one discharging operation signal; and at least one zero current detection circuit which detects a charging resonant current flowing through the charging inductor in a charging process and/or detect a discharging resonant current flowing through the discharging inductor in a discharging process. When detecting that a level of the charging resonant current or a level of the discharging resonant current is zero, the zero current detection circuit generates at least one zero current detection signal which is sent to the controller. The controller determines start time points and end time points of the charging process and the discharging process according to the zero current detection signal. There can be plural discharging processes.
    Type: Grant
    Filed: April 29, 2021
    Date of Patent: June 6, 2023
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Kuo-Chi Liu, Chung-Lung Pai, Ta-Yung Yang
  • Publication number: 20230158742
    Abstract: A high-speed additive manufacturing apparatus includes a main body, a sintering module, a product carrying member, a raw material carrying member, and a raw material wiper. The main body includes a printing tank and a raw material tank adjacent to the printing tank. The sintering module is arranged on the main body. The sintering module includes a plurality of sintering light source assemblies. Each of the sintered light source assemblies has a light beam emitting end. The light beam emitting end emits a sintering light beam. The light beam emitting ends of the sintering light source assemblies are arranged in a plurality of rows. Each light beam emitting end in one row is unaligned with the light beam emitting end in adjacent rows along a direction in which the light beam emitting end moves.
    Type: Application
    Filed: June 29, 2022
    Publication date: May 25, 2023
    Inventors: Jeng-Ywan Jeng, Chih-Hua Hsieh, Hou-Ching Lee, Yi-Chia Chen, Shaou-Chi Liu, Tzu-Yu Hsieh, Zhi-Kai Huang
  • Publication number: 20230157610
    Abstract: Multiple circuits in a computing device can share one or more conductive elements. The use of the conductive element can vary by circuit, such as an antenna radiator for a radio frequency (RF) circuit or an electrode for an electrocardiography (ECG) circuit. The circuitry sharing a conductive element can utilize signals obtained over different frequency ranges. Those ranges can be used to select decoupling circuitry, or elements, that can enable the respective circuits to obtain signals over a respective frequency range, excluding signals over one or more other frequency ranges corresponding to other circuitry sharing the circuit. Such an approach allows for concurrent independent operation of the circuitry sharing a conductive element.
    Type: Application
    Filed: November 21, 2022
    Publication date: May 25, 2023
    Inventors: Faton Tefiku, Yonghua Wei, Kevin Li, Man-Chi Liu, Lindsey Michelle Sunden, Peter W. Richards, Dennis Jacob McCray, Christos Kinezos Ioannou, Kyung Nim Noh
  • Patent number: 11646654
    Abstract: A resonant switching power converter includes: capacitors; switches; at least one charging inductor; at least one discharging inductor; a controller generating a charging operation signal corresponding to charging process and discharging operation signals corresponding to discharging processes, to operate the switches to switch electrical connection relationships of the capacitors. In the charging process, the controller controls the switches via the charging operation signal, so that a series connection of the capacitors and the charging inductor is formed between the input voltage and the output voltage, which forms a charging path. In the discharging processes, the controller controls the switches via the discharging operation signals, so that a series connection of one of the capacitors and the discharging inductor is formed between the output voltage and a ground voltage level, to form plural discharging paths at different periods in a sequential order.
    Type: Grant
    Filed: April 29, 2021
    Date of Patent: May 9, 2023
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Kuo-Chi Liu, Ta-Yung Yang, Chung-Lung Pai
  • Patent number: 11642077
    Abstract: Sleep tracking systems and techniques for monitoring two or more co-sleepers in a single bed are disclosed. Such systems and techniques may incorporate sleeper identification, as well as various non-user-specific aspects. Some implementations may incorporate user-specific or user-tailored alarm functionality.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: May 9, 2023
    Assignee: FITBIT, INC.
    Inventors: Juan Ignacio Correa Ramírez, Conor Joseph Heneghan, Lindsey Michelle Sunden, Lin Yang, Lukas Bielskis, Thomas Samuel Elliot, Benjamin B. Perkins, Priya Vijay Sheth, Jose Roberto Melgoza, Nicholas Adrian Myers, Chris H. Sarantos, Andrew Larsen Axley, Jaydip Das, Samuel Barry Tellman, Man-Chi Liu, Jeffrey Andrew Fisher
  • Publication number: 20230122218
    Abstract: Various embodiments provide a wellness tracking device with a base plate that may be utilized as a combination electrode by a variety of sensors. The base plate may be a multi-material electrode that includes a conductor and a transparent or semi-transparent material to enable optical sensing. In certain embodiments, the base plate supports a plurality of different sensors, which may selectively utilize the base plate as an electrode.
    Type: Application
    Filed: August 19, 2022
    Publication date: April 20, 2023
    Inventors: Jens Mitchell NIELSEN, Jaclyn Leverett WASSON, Kyung Nim NOH, Man-Chi LIU, Alan LUU, Peter Colin DESS, Lindsey Michelle SUNDEN, Lukas BIELSKIS, Thomas CONSOLAZIO, Steven Thomas WOODWARD
  • Publication number: 20230106895
    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: November 29, 2022
    Publication date: April 6, 2023
    Inventors: REN-CHIEH LIU, CHIH-HUAN WU, YI-HSIEN KO, HAN-CHI LIU