Patents by Inventor Han-Jung Kao

Han-Jung Kao 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: 9954432
    Abstract: A power supply apparatus with soft-start function is suitable to a load including a voltage stabilizing unit and a load unit coupled in parallel. The power supply apparatus includes a power unit, a soft-start adjusting unit, a current detecting unit and a controlling unit. The power unit generates a power voltage. The soft-start adjusting unit receives the power voltage, a first controlling signal and a second controlling signal, and transforms the power voltage to a soft-start current accordingly to output the soft-start current to the voltage stabilizing unit or output the power voltage to the voltage stabilizing unit. The current detecting unit measures a current of a loop formed between the power unit and the voltage stabilizing unit to generate a current detecting signal. The controlling unit receives the current detecting signal to generate the first controlling signal and second controlling signal.
    Type: Grant
    Filed: July 2, 2017
    Date of Patent: April 24, 2018
    Assignees: HAN-WIN TECHNOLOGY CO. LTD.
    Inventor: Han-Jung Kao
  • Publication number: 20180006550
    Abstract: A power supply apparatus with soft-start function is suitable to a load including a voltage stabilizing unit and a load unit coupled in parallel. The power supply apparatus includes a power unit, a soft-start adjusting unit, a current detecting unit and a controlling unit. The power unit generates a power voltage. The soft-start adjusting unit receives the power voltage, a first controlling signal and a second controlling signal, and transforms the power voltage to a soft-start current accordingly to output the soft-start current to the voltage stabilizing unit or output the power voltage to the voltage stabilizing unit. The current detecting unit measures a current of a loop formed between the power unit and the voltage stabilizing unit to generate a current detecting signal. The controlling unit receives the current detecting signal to generate the first controlling signal and second controlling signal.
    Type: Application
    Filed: July 2, 2017
    Publication date: January 4, 2018
    Inventor: Han-Jung KAO
  • Patent number: 8417472
    Abstract: A battery management system with synchronized data sampling for a battery pack including multiple battery cells is disclosed. The battery management system includes a plurality of local monitors coupled to a plurality of battery cells and operable for sampling status information for the battery cells. The battery management system further includes a central controller coupled to the local monitors and operable for broadcasting a sample command to the local monitor synchronously, wherein the local monitors start to sample the status information for the battery cells in response to the sample command.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: April 9, 2013
    Assignee: 02Micro Inc.
    Inventors: Han-Jung Kao, Xiaohua Hou, Xiaofeng Wang
  • Publication number: 20120280572
    Abstract: A battery system includes battery cells and a control circuit having a control pin. The control circuit determines a condition of the battery cells according to cell parameters of the battery cells. The control circuit compares a voltage at the control pin with a first voltage threshold to select an operation mode from a first mode and a second mode. In the first mode, the control circuit compares the voltage at the control pin with a second voltage threshold and generates a control signal based on a result of the comparison, such that the control signal is generated if the battery cells remain in the condition for a time period that reaches a first time threshold. In the second mode, the control circuit generates the control signal if the battery cells remain in the condition for a time period that reaches a second time threshold.
    Type: Application
    Filed: April 12, 2012
    Publication date: November 8, 2012
    Applicant: O2Micro, Inc.
    Inventors: Guoxing Li, Han-Jung Kao
  • Patent number: 8242745
    Abstract: A battery management system for a battery pack comprising multiple battery modules is disclosed. Each of the battery modules includes multiple battery cells. The battery management system includes multiple first balancing units, multiple first controllers, a second balancing unit including multiple second balancing circuits, and a second controller coupled to the battery modules and the second balancing circuits. The first controllers are operable for controlling the first balancing units to adjust voltages of battery cells in the battery module if an unbalance occurs between the battery cells. The second controller is operable for controlling said second balancing circuits to adjust voltages of said battery modules if an unbalance occurs between battery modules.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: August 14, 2012
    Assignee: O2Micro Inc.
    Inventors: Wei Zhang, Han-Jung Kao
  • Patent number: 8242742
    Abstract: A charger includes a detection pin, a voltage divider, and a comparator. The detection pin can couple the charger to a power source via a first data line. The voltage divider and the comparator are coupled to the detection pin. The voltage divider divides a power voltage provided by the power source and provides a detection voltage at the detection pin. The comparator compares the detection voltage with a predetermined reference voltage and identifies a type of the power source according to the comparing.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: August 14, 2012
    Assignee: O2Micro, Inc
    Inventors: Han-Jung Kao, Guoxing Li, Ya-Tung Kao, Wei Zhang
  • Patent number: 8198862
    Abstract: A battery management system for a battery pack comprising multiple battery modules is disclosed. Each of the battery modules includes multiple battery cells. The battery management system includes multiple first balancing units, multiple first controllers, a second balancing unit including multiple second balancing circuits, and a second controller coupled to the battery modules and the second balancing circuits. The first controllers are operable for controlling the first balancing units to adjust voltages of battery cells in the battery module if an unbalance occurs between the battery cells. The second controller is operable for controlling said second balancing circuits to adjust voltages of said battery modules if an unbalance occurs between battery modules.
    Type: Grant
    Filed: August 4, 2010
    Date of Patent: June 12, 2012
    Assignee: O2Micro Inc.
    Inventors: Wei Zhang, Han-Jung Kao
  • Patent number: 7973515
    Abstract: A power management system includes a battery pack having a battery controller and includes an adapter operable for charging the battery pack and powering a system load. The adapter generates a power recognition signal indicative of a maximum adapter power and receives a control signal. The battery controller in the battery pack receives the power recognition signal and generates the control signal to adjust an output power of the adapter according to a status of the battery pack and a status of the system load.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: July 5, 2011
    Assignee: O2Micro, Inc
    Inventors: William Densham, Han-Jung Kao, Liusheng Liu
  • Publication number: 20110140650
    Abstract: A battery management system for a battery pack comprising multiple battery modules is disclosed. Each of the battery modules includes multiple battery cells. The battery management system includes multiple first balancing units, multiple first controllers, a second balancing unit including multiple second balancing circuits, and a second controller coupled to the battery modules and the second balancing circuits. The first controllers are operable for controlling the first balancing units to adjust voltages of battery cells in the battery module if an unbalance occurs between the battery cells. The second controller is operable for controlling said second balancing circuits to adjust voltages of said battery modules if an unbalance occurs between battery modules.
    Type: Application
    Filed: August 4, 2010
    Publication date: June 16, 2011
    Inventors: Wei ZHANG, Han-Jung KAO
  • Publication number: 20110089897
    Abstract: A battery management system for a battery pack comprising multiple battery modules is disclosed. Each of the battery modules includes multiple battery cells. The battery management system includes multiple first balancing units, multiple first controllers, a second balancing unit including multiple second balancing circuits, and a second controller coupled to the battery modules and the second balancing circuits. The first controllers are operable for controlling the first balancing units to adjust voltages of battery cells in the battery module if an unbalance occurs between the battery cells. The second controller is operable for controlling said second balancing circuits to adjust voltages of said battery modules if an unbalance occurs between battery modules.
    Type: Application
    Filed: December 22, 2010
    Publication date: April 21, 2011
    Inventors: Wei ZHANG, Han-Jung KAO
  • Publication number: 20100161260
    Abstract: A battery management system with synchronized data sampling for a battery pack including multiple battery cells is disclosed. The battery management system includes a plurality of local monitors coupled to a plurality of battery cells and operable for sampling status information for the battery cells. The battery management system further includes a central controller coupled to the local monitors and operable for broadcasting a sample command to the local monitor synchronously, wherein the local monitors start to sample the status information for the battery cells in response to the sample command.
    Type: Application
    Filed: December 14, 2009
    Publication date: June 24, 2010
    Inventors: Han-Jung KAO, Xiaohua HOU, Xiaofeng WANG
  • Publication number: 20090001937
    Abstract: A power management system includes a battery pack having a battery controller and includes an adapter operable for charging the battery pack and powering a system load. The adapter generates a power recognition signal indicative of a maximum adapter power and receives a control signal. The battery controller in the battery pack receives the power recognition signal and generates the control signal to adjust an output power of the adapter according to a status of the battery pack and a status of the system load.
    Type: Application
    Filed: June 12, 2008
    Publication date: January 1, 2009
    Applicant: O2Micro, Inc.
    Inventors: William Densham, Han-Jung Kao, Liusheng Liu
  • Publication number: 20080303486
    Abstract: A charger includes a detection pin, a voltage divider, and a comparator. The detection pin can couple the charger to a power source via a first data line. The voltage divider and the comparator are coupled to the detection pin. The voltage divider divides a power voltage provided by the power source and provides a detection voltage at the detection pin. The comparator compares the detection voltage with a predetermined reference voltage and identifies a type of the power source according to the comparing.
    Type: Application
    Filed: May 30, 2008
    Publication date: December 11, 2008
    Inventors: Han-Jung Kao, Guoxing Li, Ya-Tung Kao, Wei Zhang
  • Publication number: 20080218127
    Abstract: A battery management system comprises a control circuit and an adapter. The control circuit can be used to generate a control signal according to a status of each cell of a plurality of cells in a battery pack. The adapter receives the control signal and charges the battery pack. An output power of the adapter is adjusted according to the control signal.
    Type: Application
    Filed: June 20, 2007
    Publication date: September 11, 2008
    Inventors: Han-Jung Kao, Jiankui Guo, Liusheng Liu, Ruichao Tang, Guoxing Li, Xiaohua Hou, Zhengming Zhang
  • Patent number: 7331001
    Abstract: The present invention provides a test card for multiple functions testing. The test card includes a host of media devices, all of which reside on a single printed circuit board; and a selection device which selects each one of the host of media devices for testing. The test card can test all SD, MMC, MS (Pro), SMC devices and functions in one time in a bench without inserting and removing the media devices, thus accelerates the production line test speed.
    Type: Grant
    Filed: April 6, 2004
    Date of Patent: February 12, 2008
    Assignee: O2Micro International Limited
    Inventors: Han-Jung Kao, Shih-Chun Chen, Chun-Hsi Lin, Chih-Lang Lin, ShyhShin Lee
  • Publication number: 20040268194
    Abstract: The present invention provides a test card for multiple functions testing. The test card includes a host of media devices, all of which reside on a single printed circuit board; and a selection device which selects each one of the host of media devices for testing. The test card can test all SD, MMC, MS (Pro), SMC devices and functions in one time in a bench without inserting and removing the media devices, thus accelerates the production line test speed.
    Type: Application
    Filed: April 6, 2004
    Publication date: December 30, 2004
    Inventors: Han-Jung Kao, Shih-Chun Chen, Chun-Hsi Lin, Chih-Lang Lin, ShyhShin Lee