Patents by Inventor JO-CHIEN CHANG

JO-CHIEN CHANG 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).

  • ELECTRONIC DEVICE AND POWER MANAGEMENT METHOD
    Publication number: 20140344590
    Abstract: An electronic device includes a central processing unit (CPU), a plurality of power driving circuits, and a control unit. The control unit includes a microcontroller and a storage electronically connected to the microcontroller, the microcontroller is electronically connected to the CPU and the power driving circuits. The CPU stores control programs in the storage via the microcontroller, the microcontroller reads the control programs from the storage, and controls the power driving circuits according to the control programs.
    Type: Application
    Filed: March 18, 2014
    Publication date: November 20, 2014
    Applicant: FIH (HONG KONG) LIMITED
    Inventor: JO-CHIEN CHANG
  • Portable electronic device having universal earphone jack
    Patent number: 8718296
    Abstract: A portable electronic device includes an earphone jack capable of receiving different types of earphone plugs, a switch, a detecting terminal, and a controlling terminal. The switch is connected to the earphone jack, and capable of switching between a first state and a second state. The detecting terminal is connected to the earphone jack by the switch, and capable of detecting the type of the earphone plug received in the earphone jack. The detecting terminal is connected to the earphone jack by the switch, and capable of detecting the type of the earphone plug received in the earphone jack. The controlling terminal is connected to the switch, and switches the switch to either the first state or the second state according to the type of the earphone plug.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: May 6, 2014
    Assignee: FIH (Hong Kong) Limited
    Inventor: Jo-Chien Chang
  • PORTABLE ELECTRONIC DEVICE HAVING UNIVERSAL EARPHONE JACK
    Publication number: 20120104870
    Abstract: A portable electronic device includes an earphone jack capable of receiving different types of earphone plugs, a switch, a detecting terminal, and a controlling terminal. The switch is connected to the earphone jack, and capable of switching between a first state and a second state. The detecting terminal is connected to the earphone jack by the switch, and capable of detecting the type of the earphone plug received in the earphone jack. The detecting terminal is connected to the earphone jack by the switch, and capable of detecting the type of the earphone plug received in the earphone jack. The controlling terminal is connected to the switch, and switches the switch to either the first state or the second state according to the type of the earphone plug.
    Type: Application
    Filed: June 1, 2011
    Publication date: May 3, 2012
    Applicant: FOXCONN COMMUNICATION TECHNOLOGY CORP.
    Inventor: JO-CHIEN CHANG