Patents by Inventor Ching-Yung Han

Ching-Yung Han 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: 7512726
    Abstract: A reconfigurable flash media reader system provides a flash media reader that accepts both asynchronous and synchronous flash media cards. The reader identifies the card type of the inserted flash media card and notifies the host computer of the card type. The host computer has a list of interface information for different types of flash media cards and references the card type in the list and sets the proper baud rate on the reader. If the flash media card is a synchronous card, data that is to written into the flash media card is gathered and converted to the proper card IO strobes for the card type which are interleaved with the proper card clock strobes for the card type into a bit stream in a bulk transfer packet. The reader extracts the data bit stream from said bulk transfer packet and clocks the data bit stream into the flash media card using the baud rate as a reference clock.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: March 31, 2009
    Assignee: O2Micro International Limited
    Inventors: Ching-Yung Han, Chin-Ran Lo
  • Patent number: 7309021
    Abstract: A dual mode smart card controller is provided. In one embodiment, a USB and ISO7816 smart card controller is provided that determines the type of card that is inserted into a slot. If the smart card is a USB smart card, the controller is adapted to pass control of the smart card to an external PC host USB hub circuit. If the smart card is an ISO7816 card, then control is handled by the dual mode controller. In another embodiment, the controller includes an embedded USB hub circuit to permit the controller to directly control both USB and ISO7816 smart cards. Exemplary control sequencing includes monitoring a C4 signal line for a preselected time period, or generating an enable signal if a USB smart card is detected.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: December 18, 2007
    Assignee: O2Micro International Limited
    Inventors: Neil Morrow, Hyang-Kyun Oh, Ching-Yung Han
  • Publication number: 20070084923
    Abstract: A dual mode smart card controller is provided. In one embodiment, a USB and ISO7816 smart card controller is provided that determines the type of card that is inserted into a slot. If the smart card is a USB smart card, the controller is adapted to pass control of the smart card to an external PC host USB hub circuit. If the smart card is an ISO7816 card, then control is handled by the dual mode controller. In another embodiment, the controller includes an embedded USB hub circuit to permit the controller to directly control both USB and ISO7816 smart cards. Exemplary control sequencing includes monitoring a C4 signal line for a preselected time period, or generating an enable signal if a USB smart card is detected.
    Type: Application
    Filed: December 18, 2006
    Publication date: April 19, 2007
    Inventors: Neil Morrow, Hyang-Kyun Oh (Brian Oh), Ching-Yung Han
  • Patent number: 7150397
    Abstract: A dual mode smart card controller is provided. In one embodiment, a USB and ISO7816 smart card controller is provided that determines the type of card that is inserted into a slot. If the smart card is a USB smart card, the controller is adapted to pass control of the smart card to an external PC host USB hub circuit. If the smart card is an ISO7816 card, then control is handled by the dual mode controller. In another embodiment, the controller includes an embedded USB hub circuit to permit the controller to directly control both USB and ISO7816 smart cards. Exemplary control sequencing includes monitoring a C4 signal line for a preselected time period, or generating an enable signal if a USB smart card is detected.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: December 19, 2006
    Assignee: O2Micro International Limited
    Inventors: Neil Morrow, Hyang-Kyun Oh (Brian Oh), Ching-Yung Han
  • Publication number: 20060230204
    Abstract: A reconfigurable flash media reader system provides a flash media reader that accepts both asynchronous and synchronous flash media cards. The reader identifies the card type of the inserted flash media card and notifies the host computer of the card type. The host computer has a list of interface information for different types of flash media cards and references the card type in the list and sets the proper baud rate on the reader. If the flash media card is a synchronous card, data that is to written into the flash media card is gathered and converted to the proper card IO strobes for the card type which are interleaved with the proper card clock strobes for the card type into a bit stream in a bulk transfer packet. The reader extracts the data bit stream from said bulk transfer packet and clocks the data bit stream into the flash media card using the baud rate as a reference clock.
    Type: Application
    Filed: June 20, 2006
    Publication date: October 12, 2006
    Applicant: O2MICRO INTERNATIONAL LIMITED
    Inventors: Ching-Yung Han, Chin-Ran Lo
  • Patent number: 7065591
    Abstract: A reconfigurable flash media reader system provides a flash media reader that accepts both asynchronous and synchronous flash media cards. The reader identifies the card type of the inserted flash media card and notifies the host computer of the card type. The host computer has a list of interface information for different types of flash media cards and references the card type in the list and sets the proper baud rate on the reader. If the flash media card is a synchronous card, data that is to written into the flash media card is gathered and converted to the proper card IO strobes for the card type which are interleaved with the proper card clock strobes for the card type into a bit stream in a bulk transfer packet. The reader extracts the data bit stream from said bulk transfer packet and clocks the data bit stream into the flash media card using the baud rate as a reference clock.
    Type: Grant
    Filed: August 17, 2004
    Date of Patent: June 20, 2006
    Assignee: O2Micro International Limited
    Inventors: Ching-Yung Han, Chin-Ran Lo
  • Publication number: 20050242197
    Abstract: A dual mode smart card controller is provided. In one embodiment, a USB and ISO7816 smart card controller is provided that determines the type of card that is inserted into a slot. If the smart card is a USB smart card, the controller is adapted to pass control of the smart card to an external PC host USB hub circuit. If the smart card is an ISO7816 card, then control is handled by the dual mode controller. In another embodiment, the controller includes an embedded USB hub circuit to permit the controller to directly control both USB and ISO7816 smart cards. Exemplary control sequencing includes monitoring a C4 signal line for a preselected time period, or generating an enable signal if a USB smart card is detected.
    Type: Application
    Filed: July 6, 2005
    Publication date: November 3, 2005
    Inventors: Neil Morrow, Hyang-Kyun Oh (Brian Oh), Ching-Yung Han
  • Patent number: 6913196
    Abstract: A dual mode smart card controller is provided. In one embodiment, a USB and ISO7816 smart card controller is provided that determines the type of card that is inserted into a slot. If the smart card is a USB smart card, the controller is adapted to pass control of the smart card to an external PC host USB hub circuit. If the smart card is an ISO7816 card, then control is handled by the dual mode controller. In another embodiment, the controller includes an embedded USB hub circuit to permit the controller to directly control both USB and ISO7816 smart cards. Exemplary control sequencing includes monitoring a C4 signal line for a preselected time period, or generating an enable signal if a USB smart card is detected.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: July 5, 2005
    Assignee: O2Micro International Limited
    Inventors: Neil Morrow, Hyang-Kyun Oh, Ching-Yung Han
  • Publication number: 20050015526
    Abstract: A reconfigurable flash media reader system provides a flash media reader that accepts both asynchronous and synchronous flash media cards. The reader identifies the card type of the inserted flash media card and notifies the host computer of the card type. The host computer has a list of interface information for different types of flash media cards and references the card type in the list and sets the proper baud rate on the reader. If the flash media card is a synchronous card, data that is to written into the flash media card is gathered and converted to the proper card IO strobes for the card type which are interleaved with the proper card clock strobes for the card type into a bit stream in a bulk transfer packet. The reader extracts the data bit stream from said bulk transfer packet and clocks the data bit stream into the flash media card using the baud rate as a reference clock.
    Type: Application
    Filed: August 17, 2004
    Publication date: January 20, 2005
    Inventors: Ching-Yung Han, Chin-Ran Lo
  • Publication number: 20040268133
    Abstract: A secure personal identification entry system provides an integrated approach to secure identification data entry. A controller resides in a secure PIN smart card keyboard that also contains a numeric keypad and a smart card reader and allows the numeric keypad to server two purposes: the first as a normal keypad in a keyboard and the second as a secure PIN entry keypad. The user inserts his smart card, with his PIN number information stored in the smart card's memory, into the smart card reader. An application program running on a PC that requires secure identification from the user requests that the user enter his PIN number using the keypad on the keyboard. The controller receives the PIN request and switches the keypad from normal mode to PIN entry mode. The keypad is switched to be dedicated to PIN entry and communicates with the controller. The user enters his PIN number into the keypad. The controller receives the PIN number and forwards the PIN number to the smart card.
    Type: Application
    Filed: November 1, 2002
    Publication date: December 30, 2004
    Inventors: Patrick S. Lee, Sterling D. Du, Hyang-Kyun Oh, Ching-Yung Han
  • Patent number: 6779059
    Abstract: A reconfigurable flash media reader system provides a flash media reader that accepts both asynchronous and synchronous flash media cards. The reader identifies the card type of the inserted flash media card and notifies the host computer of the card type. The host computer has a list of interface information for different types of flash media cards and references the card type in the list and sets the proper baud rate on the reader. If the flash media card is a synchronous card, data that is to written into the flash media card is gathered and converted to the proper card IO strobes for the card type which are interleaved with the proper card clock strobes for the card type into a bit stream in a bulk transfer packet. The reader extracts the data bit stream from said bulk transfer packet and clocks the data bit stream into the flash media card using the baud rate as a reference clock.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: August 17, 2004
    Assignee: O2Micro International Limited
    Inventors: Ching-Yung Han, Chin-Ran Lo
  • Publication number: 20030155420
    Abstract: A dual mode smart card controller is provided. In one embodiment, a USB and ISO7816 smart card controller is provided that determines the type of card that is inserted into a slot. If the smart card is a USB smart card, the controller is adapted to pass control of the smart card to an external PC host USB hub circuit. If the smart card is an ISO7816 card, then control is handled by the dual mode controller. In another embodiment, the controller includes an embedded USB hub circuit to permit the controller to directly control both USB and ISO7816 smart cards. Exemplary control sequencing includes monitoring a C4 signal line for a preselected time period, or generating an enable signal if a USB smart card is detected.
    Type: Application
    Filed: October 17, 2002
    Publication date: August 21, 2003
    Inventors: Neil Morrow, Hyang-Kyun Oh, Ching-Yung Han
  • Publication number: 20030041188
    Abstract: A reconfigurable flash media reader system provides a flash media reader that accepts both asynchronous and synchronous flash media cards. The reader identifies the card type of the inserted flash media card and notifies the host computer of the card type. The host computer has a list of interface information for different types of flash media cards and references the card type in the list and sets the proper baud rate on the reader. If the flash media card is a synchronous card, data that is to written into the flash media card is gathered and converted to the proper card IO strobes for the card type which are interleaved with the proper card clock strobes for the card type into a bit stream in a bulk transfer packet. The reader extracts the data bit stream from said bulk transfer packet and clocks the data bit stream into the flash media card using the baud rate as a reference clock.
    Type: Application
    Filed: November 30, 2001
    Publication date: February 27, 2003
    Inventors: Ching-Yung Han, Chin-Ran Lo