Patents by Inventor Dacai Chen

Dacai Chen 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: 8496174
    Abstract: The present invention relates to the smart card field, and more specifically to a smart card operating system and method, to avoid the failure of non-contact communication of the smart card operating system resulting from its inability to obtain the information of access to the non-contact field in the prior art. In the present invention, the communication state control module detects whether the smart card operating system enters and/or leaves the a non-contact field; and sets the communication state of the non-contact communication module of the smart card operating system based on the detection result. By applying the technical scheme of the present invention, we can avoid the communication failure which results from the non-contact communication module inability to respond properly to the inquiry from the non-contact terminal when the smart card operating system re-enters the non-contact field.
    Type: Grant
    Filed: August 7, 2007
    Date of Patent: July 30, 2013
    Assignee: Beijing Watchdata Systems Co., Ltd.
    Inventors: Dacai Chen, Daxing Xu, Tongxin Qi
  • Patent number: 8255706
    Abstract: A dual usage smart card of CPU and logical encryption and its data synchronization method. Said method comprises that a CPU command processing module controls an accessing control module for the logical encryption storage region to read the data in the logical encryption storage region to a data format conversion module; said data format conversion module transmits the data to the CPU control storage region; the CPU command processing module controls the CPU control storage region again to transmit the data of CPU card to the accessing control module for the logical encryption storage region through the data format conversion module; and said accessing control module for the logical encryption storage region writes the data of CPU card into the logical encryption storage region.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: August 28, 2012
    Assignee: Beijing Watch Data System Co., Ltd.
    Inventors: Dacai Chen, Daxing Xu, Tongxin Qi
  • Publication number: 20100017613
    Abstract: A dual usage smart card of CPU and logical encryption and its data synchronization method. Said method comprises that a CPU command processing module controls an accessing control module for the logical encryption storage region to read the data in the logical encryption storage region to a data format conversion module; said data format conversion module transmits the data to the CPU control storage region; the CPU command processing module controls the CPU control storage region again to transmit the data of CPU card to the accessing control module for the logical encryption storage region through the data format conversion module; and said accessing control module for the logical encryption storage region writes the data of CPU card into the logical encryption storage region.
    Type: Application
    Filed: December 7, 2007
    Publication date: January 21, 2010
    Applicant: BEIJING WATCH DATA SYSTEM CO., LTD.
    Inventors: Dacai Chen, Daxing Xu, Tongxin Qi
  • Publication number: 20080051143
    Abstract: The present invention relates to the smart card field, and more specifically to a smart card operating system and method, to avoid the failure of non-contact communication of the smart card operating system resulting from its inability to obtain the information of access to the non-contact field in the prior art. In the present invention, the communication state control module detects whether the smart card operating system enters and/or leaves the a non-contact field; and sets the communication state of the non-contact communication module of the smart card operating system based on the detection result. By applying the technical scheme of the present invention, we can avoid the communication failure which results from the non-contact communication module inability to respond properly to the inquiry from the non-contact terminal when the smart card operating system re-enters the non-contact field.
    Type: Application
    Filed: August 7, 2007
    Publication date: February 28, 2008
    Applicant: Beijing Watchdata System Co., Ltd.
    Inventors: Dacai Chen, Daxing Xu, Tongxin Qi
  • Publication number: 20080000989
    Abstract: The present invention relates to a smart card operating system and process, when the system is powered on, the operation mode selecting module judges the power supply manner for the system, and selects a first operation mode when the power is supplied from a non-contact power source, and selects a second operation mode when the power is supplied from a contact power source; in the first operation mode, a command processing module separately processes a non-contact command received by a non-contact communication module; in a second operation mode, the command processing module processes in parallel a contact command received by a contact communication module and a non-contact command received by a non-contact communication module. The smart card operating system is able to support simultaneously a contact communication and a non-contact communication in use of the technical solution of the present invention, which greatly enhances the application flexibility of the smart card.
    Type: Application
    Filed: June 22, 2007
    Publication date: January 3, 2008
    Applicant: Beijing Watchdata System Co., Ltd.
    Inventors: Dacai Chen, Daxing Xu, Tongxin Qi